Technical field
[0001]
　The present disclosure, the terminal apparatus, base station apparatus, a communication method.
BACKGROUND
[0002]
　Cellular mobile communication radio access scheme and a radio network (hereinafter, "Long Term Evolution (LTE)", "LTE-Advanced (LTE-A)", "LTE-Advanced Pro (LTE-A Pro)", "New Radio ( . that NR) ", also referred to as" New Radio Access Technology (NRAT) "," Evolved Universal Terrestrial Radio Access (EUTRA) ", or" Further EUTRA (FEUTRA) ") is the third generation partnership project (3rd generation partnership project: It has been studied in 3GPP). In the following description, LTE includes LTE-A, LTE-A Pro, and the EUTRA, NR is NRAT, and a FEUTRA. In LTE and NR, the base station apparatus (base station) eNodeB (an evolved NodeB), the terminal apparatus (mobile station, the mobile station apparatus, terminal) also called UE (User Equipment). LTE and NR are cellular communication system providing a plurality of areas in which the base station apparatus covers the cellular. Single base station apparatus may manage a plurality of cells.
[0003]
　NR is the next generation radio access scheme for LTE, and LTE are different RAT (Radio Access Technology). NR is, eMBB (Enhanced mobile broadband), an access technique that can accommodate a variety of use cases including mMTC (Massive machine type communications) and URLLC (Ultra reliable and low latency communications). NR is usage scenarios in those use cases, requirements, and is considered with the aim of corresponding technical frameworks like deployment scenario. Scenario details and requirements of NR, is disclosed in Non-Patent Document 1.
[0004]
　In LTE and NR, the predetermined time interval may be defined as a unit time for transmitting data. Such time interval transmission time intervals: is referred to as (TTI Transmission Time Interval). Base station apparatus and the terminal apparatus, based on the TTI, performs transmission and reception of physical channels and / or physical signals. For example, the TTI details in LTE, is disclosed in Non-Patent Document 2.
[0005]
　Also, TTI is used as a unit for defining a procedure of data transmission. For example, in the procedure of the data transmission, HARQ-ACK indicating whether the received data is correctly received (Hybrid Automatic Repeat request - acknowledgement) report, time after defined from the reception of the data by an integer multiple of TTI in It is sent. In that case, the time (delay, latency) for data transmission will be determined depending on the TTI. In particular, latency for which requirements are different depending on the use case, TTI is desirably altered by the use case. Procedure for such data transmission is disclosed in Non-Patent Document 3.
CITATION
Non-patent literature
[0006]
非特許文献1 : 3rd Generation PartnershipProject; Technical Specification Group Radio Access Network; Study on Scenariosand Requirements for Next Generation Access Technologies; (Release 14), 3GPP TR38.913 V0.3.0.
非特許文献2 : 3rd　Generation　Partnership　Project;　Technical　Specification　Group　Radio　Access　Network;　Evolved　Universal　Terrestrial　Radio　Access　(E-UTRA)　and　Evolved　Universal　Terrestrial　Radio　Access　Network　(E-UTRAN);　Overall　description;　Stage　2　(Release　13),　3GPP　TS　36.300　V13.3.0.
非特許文献3 : 3rd　Generation　Partnership　Project;　Technical　Specification　Group　Radio　Access　Network;　Evolved　Universal　Terrestrial　Radio　Access　(E-UTRA);　Physical　layer　procedures　(Release　12)　,　3GPP　TS　36.213　V13.1.1.
Summary of the Invention
Problems that the Invention is to Solve
[0007]
　In the radio access technology, the parameters (physical parameters) of the transmission signal such as a sub-carrier spacing and symbol length is preferably optimally designed depending on the use case. However, in consideration of the LTE expansion technology, the terminal device using the extension techniques, from the viewpoint of frequency utilization efficiency, it is important to perform the multiplexing of the conventional LTE terminals. Therefore, extended techniques in LTE is backward compatible is required, can result in giving limitations to its extended technology. As a result, such a limit may result in affecting relative transmission efficiency of the entire system.
[0008]
　Further, in the use case latency is an important element, TTI size (length) affects the characteristics. In order to reduce the time required for data transmission, when assigning successively more physical resources to the terminal device of such a use case, becomes a factor of transmission efficiency of the overall system degrades significantly.
[0009]
　The present disclosure has been made in view of the above problems, its object is a communication system in which a base station apparatus and the terminal apparatus to communicate, for various use cases including particularly use cases reduction is required latency by flexibly designed Te, the base station apparatus capable of greatly improve the transmission efficiency of the whole system, a terminal device, a communication system is to provide a communication method and an integrated circuit.
Means for Solving the Problems
[0010]
　According to the present disclosure, a terminal apparatus communicating with the base station apparatus, and a control unit that sets one or more second TTI set by the control information from the base station apparatus, the second TTI settings If set, monitored and first PDCCH corresponding to a first TTI, and a second PDCCH corresponding to a second TTI shorter duration than the first TTI, the second TTI receiving a second PDSCH mapped to, when said second TTI setting is not set, the first PDCCH monitoring, the first receiving unit for receiving the PDSCH is mapped to a first TTI comprising the door, terminal device is provided.
[0011]
　Further, according to the present disclosure, a base station device communicating with the terminal device, and a control unit that sets one or more second TTI set by the control information to the terminal device, the second TTI If the setting is set, and monitoring the first PDCCH corresponding to a first TTI, and a second PDCCH corresponding to a second TTI shorter duration than the first TTI, the second send a second PDSCH mapped to the TTI, when the second TTI settings are not set, and monitoring the first PDCCH, and transmits a first PDSCH is mapped to the first TTI and a transmitter, the base station apparatus is provided.
[0012]
　Further, according to the present disclosure, the steps of a communication method used in a terminal device communicating with the base station apparatus sets one or more second TTI set by the control information from the base station apparatus, wherein If the second TTI setting is set, a first PDCCH corresponding to a first TTI, and a second PDCCH corresponding to a second TTI shorter duration than the first TTI monitored , if receiving a second PDSCH is mapped to the second TTI, the second TTI settings are not set, and monitoring the first PDCCH, second it is mapped to the first TTI and a step of receiving the first PDSCH, the communication method is provided.
[0013]
　Further, according to the present disclosure, the steps of a communication method used in a base station device communicating with the terminal apparatus, sets the one or more second TTI set by the control information to the terminal device, the If the second TTI setting is set, a first PDCCH corresponding to a first TTI, and a second PDCCH corresponding to a second TTI shorter duration than the first TTI monitored If the sending the second PDSCH is mapped to the second TTI, the second TTI settings are not set, and monitoring the first PDCCH, second it is mapped to the first TTI and a step of transmitting one of the PDSCH, a communication method is provided
Effect of the invention
[0014]
　According to the present disclosure described above, in a radio communication system having a base station apparatus and the terminal apparatus to communicate, thereby improving the transmission efficiency.
[0015]
　Incidentally, the above effect is not necessarily restrictive, with the above effects, or instead of the above effects, any effects shown herein, or other effects that may be grasped from the description, it may be achieved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016]
Is a diagram showing an example of a setting of a component carrier in FIG. 1 embodiment.
Is a diagram showing an example of a setting of a component carrier in FIG. 2 embodiment.
3 is a diagram showing an example of an LTE downlink subframe in the present embodiment.
Is a diagram illustrating an example of an LTE uplink sub-frame in FIG. 4 embodiment.
It is a diagram illustrating an example set of parameters related to the transmission signal in the NR cell in FIG. 5 embodiment.
6 is a diagram showing an example of a downlink subframe of the NR in this embodiment.
7 is a diagram showing an example of an uplink subframe of the NR in this embodiment.
8 is a schematic block diagram showing a configuration of a base station apparatus of the present embodiment.
9 is a schematic block diagram showing a configuration of a terminal device of the present embodiment.
It is a diagram illustrating an example of an LTE downlink resource element mapping in FIG. 10 embodiment.
11 is a diagram showing an example of a downlink resource elements mapping NR in this embodiment.
It is a diagram illustrating an example of a downlink resource elements mapping NR in FIG. 12 embodiment.
13 is a diagram showing an example of a downlink resource elements mapping NR in this embodiment.
14 is a diagram showing an example of a resource element mapping method of NR in the present embodiment.
It is a diagram illustrating an example of a resource element mapping method of NR in FIG. 15 embodiment.
It is a diagram illustrating an example of a frame structure of a self-contained transmission in FIG. 16 embodiment.
17 is a diagram showing an example of scheduling in the first TTI and the second TTI in this embodiment.
18 is a diagram showing an example of scheduling in the first TTI and the second TTI in this embodiment.
19 is a diagram showing an example of a flow for monitoring the control channel in the present embodiment.
Is a block diagram showing a first example of a schematic configuration of an eNB [20] according to the disclosed technique may be applied.
21 is a block diagram showing a second exemplary configuration of an eNB of the technology according to the present disclosure may be applied.
22 is a block diagram showing an example of a schematic configuration of a smart phone 900 which techniques may be applied according to the present disclosure.
FIG. 23 is a block diagram showing an example of a schematic configuration of the car navigation system 920 techniques may be applied according to the present disclosure.
DESCRIPTION OF THE INVENTION
[0017]
　Reference will now be described in detail preferred embodiments of the present disclosure. In the specification and the drawings, components having substantially the same function and structure are a repeated explanation thereof by referring to the figures. Further, unless otherwise specified, the techniques described below, functions, methods, construction, procedure, and all other described can be applied to LTE and NR.
[0018]
　　
　In the present embodiment, the wireless communication system, characterized by at least the base station apparatus 1 and terminal apparatus 2. The base station apparatus 1 can accommodate a plurality of terminal devices. The base station apparatus 1 can be connected together by another base station apparatus and the X2 interface means. Further, the base station apparatus 1 can be connected to an EPC (Evolved Packet Core) by means of a S1 interface to an. Furthermore, the base station apparatus 1 may be connected to the MME (Mobility Management Entity) by means of S1-MME interface can connect to a S-GW (Serving Gateway) by means of S1-U interface. S1 interface to an are between the MME and / or S-GW and the base station apparatus 1 and supports a many-to-many connections. Further, in the present embodiment, the base station apparatus 1 and terminal apparatus 2 supports LTE and / or NR, respectively.
[0019]
　　
　In the present embodiment, the base station apparatus 1 and the terminal device 2, supports one or more radio access technology (RAT), respectively. For example, RAT includes LTE and NR. One RAT corresponds to one cell (component carrier). That is, when a plurality of RAT are supported, their RAT, each correspond to a different cell. In this embodiment, the cell, the downlink resource, uplink resource, and / or a combination of side links. In the following description, the cell corresponding to the LTE is referred to as LTE cell, the cell corresponding to NR is referred to as a NR cell. Also, LTE is referred to as the first RAT, NR is referred to as the second RAT.
[0020]
　Communication downlink is a communication for the terminal apparatus 2 from the base station apparatus 1. Uplink communication is a communication from the terminal device 2 to the base station apparatus 1. Communication side links is a communication to another terminal apparatus 2 from the terminal device 2.
[0021]
　Communication side links are defined for direct proximity detection and proximity direct communication between terminals. Communication side links may use the same frame structure and the uplink and downlink. The communication of the side links may be limited to a portion of the uplink resource and / or downlink resources (subset).
[0022]
　The base station apparatus 1 and terminal apparatus 2, the downlink, in uplink and / or side links, capable of supporting communication using a set of one or more cells. A set of a plurality of cells is referred to as carrier aggregation or dual connectivity. For more information on carrier aggregation and dual connectivity will be described later. Further, each cell using a predetermined frequency bandwidth. Maximum value in a predetermined frequency bandwidth, minimum and Possible values ​​may be defined in advance.
[0023]
　Figure 1 is a diagram showing an example of a setting of a component carrier in the present embodiment. In the example of FIG. 1, one LTE cell and two NR cell is set. One LTE cell is set as the primary cell. Two NR cell is set as the primary secondary cell and the secondary cell, respectively. Two NR cell is integrated by the carrier aggregation. Also, LTE cell and NR cell is integrated by the dual connectivity. Incidentally, LTE cell and NR cell may be integrated by the carrier aggregation. In the example of FIG. 1, NR, since it can be assisted to connect the LTE cell is the primary cell may not support some functions, such as functions for communicating standalone. Function for communicating a standalone includes functions required for initial connection.
[0024]
　Figure 2 is a diagram showing an example of a setting of a component carrier in the present embodiment. In the example of FIG. 2, two NR cell is set. Two NR cell is set as the primary cell and secondary cell, respectively, it is integrated by the carrier aggregation. In this case, NR cell by supporting function for communicating a standalone, assist LTE cell becomes unnecessary. Incidentally, the two NR cell may be integrated dual connectivity.
[0025]
　　
　In the present embodiment, 10 ms radio frame consists of (in milliseconds) (radio frame) is defined. Each radio frame includes two half-frames. Time interval of half-frame is 5ms. Each half-frame consists of five subframes. Time interval of the subframe is 1 ms, is defined by two consecutive slots. Time interval of the slot is 0.5 ms. I th subframe in the radio frame is composed of a (2 × i) th slot and (2 × i + 1) th slot. That is, in each radio frame, 10 subframes are defined.
[0026]
　Sub-frame includes a downlink sub-frame, the uplink sub-frame, and special sub-frame and the side link sub-frame.
[0027]
　Downlink subframe is a subframe are reserved for downlink transmission. Uplink subframe is a subframe are reserved for uplink transmission. Special sub-frame is made up of three fields. Three fields, DwPTS (Downlink Pilot Time Slot), GP (Guard Period), and UpPTS the (Uplink Pilot Time Slot). DwPTS, the length of the sum of the GP, and UpPTS is 1ms. DwPTS is a field that is reserved for transmission downlink. UpPTS is a field that is reserved for the uplink transmission. GP is a field downlink transmission and uplink transmission is not performed. Note that special subframe may be configured only by the DwPTS and GP, it may be constituted only by GP and UpPTS. Special subframe is arranged between the downlink subframe and the uplink subframe in TDD, it is used to switch to the uplink sub-frame from the downlink subframe. Side subframe is a subframe that is reserved or set for the side link communication. Side links are used for proximity direct communication and direct proximity detection between terminals.
[0028]
　Single radio frame is a downlink subframe, an uplink subframe, and a special subframe and / or the side subframe. Also, a single radio frame is a downlink subframe, an uplink subframe may be configured only in special subframe or the side subframe.
[0029]
　A plurality of radio frame structure is supported. Radio frame structure is defined by the frame structure type. Frame structure type 1 applicable only to FDD. Frame structure type 2 is applicable only to TDD. Frame structure type 3 is applicable only to the operation of the LAA (Licensed Assisted Access) secondary cell.
[0030]
　In the frame structure type 2, a plurality of uplink - downlink configuration is defined. Uplink - in the downlink arrangement, each of the 10 sub-frames in one radio frame, downlink subframe, corresponding to one uplink subframe and special subframe. Subframe 0, subframe 5 and DwPTS are always reserved for downlink transmission. UpPTS and sub-frame immediately following the special subframe is always reserved for uplink transmission.
　In the frame structure type 3, 10 sub-frames within one radio frame is reserved for downlink transmission. Terminal 2 deals with each sub-frame as an empty subframe. Terminal device 2, a predetermined signal, without this being detected at the subframe is channel and / or downlink transmission is assumed that the absence of any signal and / or channel to the sub-frame. Downlink transmission is occupied by one or more contiguous subframes. Its first subframe of the downlink transmission, where may be initiated even from within that sub-frame. The last sub-frame of the downlink transmission, either completely occupied, either exclusively in the time interval defined by the DwPTS, may be either.
[0031]
　Note that in the frame structure type 3, 10 sub-frames within one radio frame may be reserved for uplink transmission. Further, each of the 10 sub-frames within one radio frame, downlink subframe, an uplink subframe, may correspond to any of the special subframe and the side subframe.
[0032]
　The base station apparatus 1 in the DwPTS of the special subframe may transmit a physical downlink channel and the physical downlink signal. The base station apparatus 1 in the DwPTS of the special subframe, can limit the transmission of the PBCH. The terminal apparatus 2, in the UpPTS of the special subframe may transmit a physical uplink channel and the physical uplink signal. The terminal apparatus 2, in the UpPTS of the special subframe, can limit the transmission of part of a physical uplink channel and the physical uplink signal.
[0033]
　　
　FIG. 3 is a diagram showing an example of LTE downlink subframe in the present embodiment. The view shown in Figure 3, also referred to as LTE downlink resource grid. The base station apparatus 1, in the downlink subframe to the terminal device 2 can transmit LTE physical downlink channel and / or LTE physical downlink signals. The terminal apparatus 2, in the downlink sub-frame from the base station apparatus 1 can receive the LTE physical downlink channel and / or LTE physical downlink signals.
[0034]
　Figure 4 is a diagram showing an example of an LTE uplink sub-frame in this embodiment. The view shown in Figure 4, also referred to as LTE uplink resource grid. The terminal apparatus 2, in the uplink subframe to the base station apparatus 1 can transmit the LTE physical uplink channel and / or LTE physical uplink signal. The base station apparatus 1 in the uplink subframe from a terminal device 2 can receive the LTE physical uplink channel and / or LTE physical uplink signal.
[0035]
　In the present embodiment, the physical resources of LTE may be defined as follows. One slot is defined by a plurality of symbols. Physical signal or a physical channel transmitted in each slot is represented by a resource grid. In the downlink, resource grid includes a plurality of subcarriers for the frequency direction is defined by a plurality of OFDM symbols for the time direction. In uplink, the resource grid includes a plurality of subcarriers for the frequency direction is defined by a plurality of SC-FDMA symbols for the time direction. The number of subcarriers or resource blocks may be determined depending on the band width of the cell. The number of symbols in one slot, depends on the type of CP (Cyclic Prefix). Type of CP is a normal CP or an extended CP. In the normal CP, the number of OFDM symbols or SC-FDMA symbols constituting one slot is 7. In Extended CP, the number of OFDM symbols or SC-FDMA symbols constituting one slot is 6. It referred respectively to as a resource element of the element in the resource grid. Resource element is identified by using the index of the symbol index subcarrier (ID) (No.). In the description of this embodiment, OFDM symbols or SC-FDMA symbols are simply referred to as a symbol.
[0036]
　Resource blocks are used for mapping certain physical channels (such as PDSCH or PUSCH) to resource elements. Resource block includes a virtual resource block and physical resource block. Certain physical channel is mapped to the virtual resource blocks. Virtual resource block is mapped to physical resource blocks. One physical resource block is defined by the successive symbols of a predetermined number in the time domain. One physical resource block is defined and a consecutive subcarriers of a predetermined number in the frequency domain. The number of symbols and the number of subcarriers in one physical resource block, the type of CP in the cell is determined based like parameters set by the sub-carrier spacing and / or the upper layer. For example, a type is a normal CP in CP, when the subcarrier spacing is 15 kHz, the number of symbols in one physical resource blocks is 7, the number of subcarriers is 12. In that case, one physical resource block is composed of (7 × 12) pieces of resource elements. Physical resource blocks are numbered from 0 in the frequency domain. Further, the same physical resource block number corresponds, two resource blocks in one subframe is defined as a physical resource block pairs (PRB pairs, RB pair).
[0037]
　In each of the LTE cell, in some subframe, one predetermined parameter is used. For example, the predetermined parameter is a parameter related to the transmission signal. Parameters relating to transmission signals, CP length, a subcarrier spacing, number of symbols in one subframe (predetermined time length), the number of subcarriers definitive one resource blocks (predetermined frequency band), TTI size, a multiple access scheme and including signal waveform.
[0038]
　That is, in the LTE cell, the downlink signal and uplink signal are respectively predetermined time length (for example, subframe) in, is generated using one predetermined parameter. In other words, the terminal device 2, a downlink signal transmitted from the base station apparatus 1, and an uplink signal to be transmitted to the base station apparatus 1 in each predetermined time length, it is generated at one predetermined parameter , and it is assumed. Further, the base station apparatus 1, a downlink signal to be transmitted to the terminal device 2, and, as an uplink signal transmitted from the terminal apparatus 2, at each predetermined time length, is generated at one predetermined parameter set to.
[0039]
　　
　In each of NR cell, a certain predetermined length of time (e.g., subframes), the one or more predetermined parameters are used. That is, in the NR cell, downlink signals and uplink signals in each predetermined time length, is generated using one or more predetermined parameters. In other words, generation terminal apparatus 2, a downlink signal transmitted from the base station apparatus 1, and an uplink signal to be transmitted to the base station apparatus 1 in each predetermined length of time at one or more predetermined parameters is is, to be assumed. Further, the base station apparatus 1, a downlink signal to be transmitted to the terminal device 2, and the uplink signal transmitted from the terminal apparatus 2, at each predetermined time length, is generated at one or more predetermined parameters It can be set to. If a plurality of predetermined parameters are used, the signal generated is used their predetermined parameters are multiplexed by a predetermined method. For example, the predetermined method, FDM (Frequency Division Multiplexing), TDM (Time Division Multiplexing), etc. CDM (Code Division Multiplexing) and / or SDM (Spatial Division Multiplexing).
[0040]
　The combination of predetermined parameters to be set in NR cell, as a parameter set can be defined in advance plural kinds.
[0041]
　Figure 5 is a diagram showing an example of a parameter set related to the transmission signal in the NR cell. In the example of FIG. 5, the parameters relating to the transmission signal included in the parameter set, subcarrier spacing, number of subcarriers per resource block in NR cell, the number of symbols per subframe, and a CP length type. CP length type is a CP length type used in NR cell. For example, CP lengths Type 1 corresponds to the normal CP in LTE, CP length Type 2 corresponds to the extended CP in LTE.
[0042]
　Parameter sets for transmitting signals in the NR cell can be defined individually in the downlink and uplink. The parameter sets for transmitting signals in the NR cell can be set independently in the downlink and uplink.
[0043]
　Figure 6 is a diagram showing an example of a downlink subframe of the NR in this embodiment. In the example of FIG. 6, a parameter set 1, signal generated using the parameter set 0 and the parameter set 2, in the cell (system bandwidth), is FDM. The view shown in FIG. 6 is referred to as downlink resource grid of NR. The base station apparatus 1, in the downlink subframe to the terminal device 2 can transmit physical downlink signal of the physical downlink channel and / or NR a NR. The terminal apparatus 2, in the downlink sub-frame from the base station apparatus 1 can receive the physical downlink signal of the physical downlink channel and / or NR a NR.
[0044]
　Figure 7 is a diagram showing an example of the uplink sub-frame of the NR in this embodiment. In the example of FIG. 7, a parameter set 1, signal generated using the parameter set 0 and the parameter set 2, in the cell (system bandwidth), is FDM. The view shown in FIG. 6 is referred to as an uplink resource grid of NR. The base station apparatus 1 in the uplink subframe to the terminal device 2 can transmit physical uplink signal of the physical uplink channel and / or NR a NR. The terminal apparatus 2, in the uplink sub-frame from the base station apparatus 1 can receive the physical uplink signal of the physical uplink channel and / or NR a NR.
[0045]
　　
　antenna port, the propagation channel for carrying a symbol is defined in order to be able to infer from the propagation channel carrying another symbol in the same antenna port. For example, different physical resources in the same antenna port, can be assumed to have been transmitted in the same transmission channel. That is, the symbols in one antenna port, it is possible to estimate the propagation channel by a reference signal at the antenna port, and demodulates. Also, there is one resource grid for each antenna port. Antenna port is defined by the reference signal. Further, each of the reference signal can define multiple antenna ports.
　Antenna port is specified or identified by the antenna port number. For example, antenna ports 0-3 is an antenna port CRS is transmitted. That, PDSCH transmitted on antenna ports 0 to 3 can be demodulated by CRS corresponding to antenna ports 0 to 3.
[0046]
　If two antenna ports predetermined condition is satisfied, the quasi-same position: it can be expressed as a (QCL Quasi co-location). The predetermined condition, wide-area characteristic of the propagation channel for carrying symbols at a antenna port is to be inferred from the propagation channel carrying the symbols in another antenna port. Regional characteristics comprise delay spread, Doppler spread, Doppler shift, the average gain and / or average delay.
[0047]
　In this embodiment, the antenna port number may be defined differently for each RAT, it may be defined in common between RAT. For example, antenna ports 0-3 in LTE is an antenna port CRS is transmitted. In NR, antenna ports 0-3, the antenna may have ports CRS similar to LTE are transmitted. Further, the antenna port in the NR, in which the same LTE CRS are transmitted may be a different antenna port number is the antenna port 0-3. In the description of this embodiment, the predetermined antenna port numbers, can be applied to LTE and / or NR.
[0048]
　　
　In the present embodiment, the physical channels and physical signals are used.
[0049]
　Physical channel includes a physical downlink channel, a physical uplink channel and a physical side link channel. Physical signals include the physical downlink signal, the physical uplink signals and side link physical signals.
[0050]
　Physical channels and physical signals in the LTE is referred to as LTE physical channel and LTE physical signals. Physical channels and physical signals in the NR is also called respectively NR physical channels and NR physical signals. LTE physical channels and NR physical channel may be defined as a different physical channel respectively. LTE physical signals and NR physical signals can be defined as different physical signals. In the description of this embodiment, LTE physical channel and NR physical channels are simply referred to as physical channels, LTE physical signals and NR physical signal is simply referred to as physical signals. That is, description for the physical channel can be applied to any of the LTE physical channel and NR physical channel. Description of the physical signal can be applied to any of the LTE physical signals and NR physical signals.
[0051]
　Physical downlink channel, a physical broadcast channel (PBCH: Physical Broadcast Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid automatic repeat request Indicator Channel), a physical downlink control channel (PDCCH: Physical Downlink Control Channel) , extended physical downlink control channel (EPDCCH: Enhanced PDCCH), MTC (Machine Type Communication) physical downlink control channel (MPDCCH: MTC PDCCH), a relay physical downlink control channel (R-PDCCH: relay PDCCH), physical downlink shared channel (PDSCH: Physical Downlink shared channel), and, including PMCH (Physical Multicast channel).
[0052]
　Physical downlink signal, the synchronization signal (SS: Synchronization signal), a downlink reference signal (DL-RS: Downlink Reference Signal) and the detection signal (DS: Discovery signal) and the like.
[0053]
　Synchronization signal, the primary synchronization signal (PSS: Primary synchronization signal) and the secondary synchronization signal (SSS: Secondary synchronization signal) and the like.
[0054]
　Reference signal in the downlink cell-specific reference signals (CRS: Cell-specific reference signal), the terminal device-specific reference signal associated with PDSCH (PDSCH-DMRS: UE-specific reference signal associated with PDSCH), demodulation associated with the EPDCCH reference signal (EPDCCH-DMRS: Demodulation reference signal associated with EPDCCH), PRS (Positioning reference signal), CSI reference signal (CSI-RS: Channel State Information - reference signal), and tracking the reference signal (TRS: Tracking reference signal), etc. including. PDSCH-DMRS is referred to as URS or simply URS related PDSCH. EPDCCH-DMRS is also called DMRS or simply DMRS associated EPDCCH. PDSCH-DMRS and EPDCCH-DMRS is simply referred to as DL-DMRS or downlink demodulation reference signal. CSI-RS comprises an NZP CSI-RS (Non-Zero Power CSI-RS). Also, downlink resource, ZP CSI-RS (Zero Power CSI-RS), CSI-IM - including (Channel State Information Interference Measurement).
[0055]
　Physical uplink channel is a physical uplink shared channel (PUSCH: Physical Uplink Shared Channel), a physical uplink control channel (PUCCH: Physical Uplink Control Channel), and a physical random access channel (PRACH: Physical Random Access Channel) and the like .
[0056]
　Physical uplink signal, an uplink reference signal: including (UL-RS Uplink Reference Signal).
[0057]
　Uplink reference signal, an uplink demodulation signal (UL-DMRS: Uplink demodulation signal) and a sounding reference signal (SRS: Sounding reference signal) and the like. UL-DMRS is associated with transmission of the PUSCH or PUCCH. SRS is not associated with transmission of the PUSCH or PUCCH.
[0058]
　Physical side link channel is a physical side links broadcast channel (PSBCH: Physical Sidelink Broadcast Channel), a physical side link control channel (PSCCH: Physical Sidelink Control Channel), a physical side links detection channel (PSDCH: Physical Sidelink Discovery Channel), and the physical side link shared channel (PSSCH: Physical Sidelink shared channel), and the like.
[0059]
　Physical channels and physical signals are simply referred to as channels and signals. That is, the physical downlink channel, a physical uplink channel and a physical side link channel, the downlink channel respectively, are referred to as uplink channels, and a side link channel. Physical downlink signal, the physical uplink signals and the physical side link signal, the downlink signal, respectively, are referred to as uplink signals, and side links signals.
[0060]
　BCH, MCH, UL-SCH and DL-SCH is a transport channel. Medium access control: a channel used by the (Medium Access Control MAC) layer is referred to as a transport channel. The unit of transport channel used in the MAC layer, the transport block (transport block: TB) or also referred to as MAC PDU (Protocol Data Unit). Control of HARQ (Hybrid Automatic Repeat reQuest) is performed for each transport block in the MAC layer. Transport block is a unit of the MAC layer passes to the physical layer (deliver) data. In the physical layer, the transport block is mapped to a codeword, the encoding process is performed for each code word.
[0061]
　Incidentally, the downlink reference signal and uplink reference signal is simply referred to as the reference signal (RS).
[0062]
　　
　As described already, description for the physical channel and the physical signal can respectively applied to LTE physical channel and LTE physical signals. LTE physical channel and LTE physical signal is referred as follows.
[0063]
　LTE physical downlink channel includes LTE-PBCH, LTE-PCFICH, LTE-PHICH, LTE-PDCCH, LTE-EPDCCH, LTE-MPDCCH, LTE-R-PDCCH, LTE-PDSCH, and the like LTE-PMCH.
[0064]
　LTE physical downlink signals, including LTE-SS, LTE-DL- RS and LTE-DS. LTE-SS is, including LTE-PSS and LTE-SSS. LTE-RS comprises LTE-CRS, LTE-PDSCH- DMRS, LTE-EPDCCH-DMRS, LTE-PRS, LTE-CSI-RS, and LTE-TRS like.
　LTE physical uplink channel includes LTE-PUSCH, LTE-PUCCH, and LTE-PRACH and the like.
[0065]
　LTE Physical Uplink signals include LTE-UL-RS. LTE-UL-RS is, including LTE-UL-DMRS and LTE-SRS.
[0066]
　LTE physical side links channel includes LTE-PSBCH, LTE-PSCCH, LTE-PSDCH, and LTE-PSSCH the like.
[0067]
　　
　As described already, description for the physical channel and the physical signal can be applied to NR physical channels and NR physical signals. NR physical channels and NR physical signal is referred as follows.
[0068]
　It is NR physical downlink channel, NR-PBCH, NR-PCFICH, NR-PHICH, NR-PDCCH, NR-EPDCCH, NR-MPDCCH, NR-R-PDCCH, NR-PDSCH, and including NR-PMCH.
[0069]
　NR physical downlink signals, including NR-SS, NR-DL-RS and NR-DS. NR-SS is, including NR-PSS and NR-SSS. NR-RS comprises NR-CRS, NR-PDSCH-DMRS, NR-EPDCCH-DMRS, NR-PRS, NR-CSI-RS, and NR-TRS like.
[0070]
　It is NR physical uplink channel, including NR-PUSCH, NR-PUCCH, and NR-PRACH and the like.
[0071]
　NR Physical Uplink signals include NR-UL-RS. NR-UL-RS comprises like NR-UL-DMRS and NR-SRS.
[0072]
　NR physical side links channel includes NR-PSBCH, NR-PSCCH, NR-PSDCH, and NR-PSSCH the like.
[0073]
　　 PDCCH and EPDCCH is downlink control information (Downlink Control Information: DCI) used to transmit. Mapping of information bits of the downlink control information is defined as the DCI format. Downlink control information includes downlink grant (downlink grant) and uplink grant (uplink grant). Downlink grant, also referred to as a downlink assignment (downlink assignment) or downlink allocation (downlink allocation).
[0074]
　PDCCH is transmitted by a set of contiguous one or more CCE (Control Channel Element). CCE is comprised of nine REG (Resource Element Group). REG is comprised of four resource elements. If PDCCH is composed of n consecutive CCE, the PDCCH begins satisfies CCE remainder of dividing i is an index (number) of CCE in which n is 0.
[0075]
　EPDCCH is transmitted by a set of contiguous one or more of ECCE (Enhanced Control Channel Element). ECCE is composed of a plurality of EREG (Enhanced Resource Element Group).
[0076]
　Downlink grant is used for scheduling of the PDSCH in a cell. Downlink grant, the downlink grant is used for scheduling PDSCH in the same subframe as the subframe was transmitted. Uplink grant is used for the scheduling of PUSCH in a cell. Uplink grant, the uplink grant is used for the scheduling of a single PUSCH in a subframe after four more than the sub-frames transmitted.
[0077]
　The DCI, CRC (Cyclic Redundancy Check) parity bits are added. CRC parity bits are scrambled by RNTI (Radio Network Temporary Identifier). RNTI is depending on the purpose of the DCI, an identifier that can be defined or set. RNTI is an identifier which is set as the information unique predefined by the identifier, the cell specification, the identifier is set as the information unique to the terminal device 2, or is set as the information unique to the group to which belongs the terminal apparatus 2 that is an identifier. For example, the terminal device 2, in the monitoring of the PDCCH or EPDCCH, descramble a predetermined RNTI on the CRC parity bits which are added to the DCI, identify whether the CRC is correct. If the CRC is correct, it can be seen that DCI is DCI for the terminal device 2.
[0078]
　PDSCH is a downlink data: used for transmitting (Downlink Shared Channel DL-SCH) to. Also, PDSCH is also used for transmitting control information of the upper layer.
[0079]
　In PDCCH region, a plurality of PDCCH frequency, time, and / or may be spatially multiplexed. In EPDCCH region, a plurality of EPDCCH frequency, time, and / or may be spatially multiplexed. In PDSCH region, a plurality of PDSCH frequency, time, and / or may be spatially multiplexed. PDCCH, PDSCH and / or EPDCCH frequency, time, and / or may be spatially multiplexed.
[0080]
　　
　synchronization signal, the terminal device 2 is used to synchronize the frequency domain and / or time domain of the downlink. Synchronization signal includes a PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal). Synchronization signal is arranged in a predetermined subframe in a radio frame. For example, in a TDD system, the synchronization signals are arranged in sub-frame 0, 1, 5, and 6 in the radio frame. In FDD scheme, the synchronization signals are arranged in sub-frame 0 and 5 in the radio frame.
[0081]
　PSS may be used to identify a coarse frame / symbol timing synchronization (synchronization in the time domain) or cell groups. SSS may be used for more accurate identification of frame timing synchronization and cell. That is, by using the PSS and SSS, it is possible to perform frame timing synchronization and cell identification.
[0082]
　Downlink reference signals, channel estimation of the terminal device 2 is a physical downlink channel, the propagation path compensation, the calculation of the downlink CSI (Channel State Information, the channel state information), and / or the measurement of positioning of the terminal device 2 used to perform.
[0083]
　CRS is transmitted over the entire band of the sub-frame. CRS is, PBCH, PDCCH, PHICH, used for performing PCFICH, and receiving the PDSCH (the demodulation). CRS may be used for the terminal device 2 calculates the downlink channel state information. PBCH, PDCCH, PHICH, and the PCFICH is transmitted at antenna port used for transmission of the CRS. CRS supports the structure of 1, 2 or 4 antenna ports. CRS is transmitted on one or more antenna ports 0-3.
[0084]
　URS related PDSCH are transmitted in the subframe and the bandwidth used for transmitting the PDSCH that URS is associated. URS is used to demodulate the PDSCH that URS is associated. URS related PDSCH is sent in one or more antenna ports 5,7-14.
[0085]
　PDSCH based on the transmission mode and the DCI format, is transmitted on antenna port used for transmission of the CRS or URS. DCI format 1A is used for scheduling PDSCH to be transmitted at the antenna port used for transmission of the CRS. DCI format 2D is used for scheduling PDSCH to be transmitted at the antenna port used for transmission of the URS.
[0086]
　DMRS associated with EPDCCH is, DMRS is transmitted in sub-frame and the bandwidth used for transmitting the associated EPDCCH. DMRS is used to demodulate the EPDCCH the DMRS is associated. EPDCCH is transmitted on antenna port used for transmission of the DMRS. DMRS associated with EPDCCH is transmitted on one or more antenna ports 107-114.
[0087]
　　
　PUCCH is an uplink control information: a physical channel used for transmitting (Uplink Control Information UCI). Uplink control information, downlink channel state information (Channel State Information: CSI), scheduling request indicating a request of the PUSCH resource (Scheduling Request: SR), downlink data (Transport block: TB, Downlink- Shared Channel: DL including HARQ-ACK for -SCH). HARQ-ACK is, ACK / NACK, HARQ feedback, or, also called response information. Further, HARQ-ACK for the downlink data indicate ACK, NACK or DTX,.
[0088]
　PUSCH is uplink data: a physical channel used to transmit (Uplink-Shared Channel UL-SCH). Further, PUSCH may be used to transmit the HARQ-ACK and / or channel state information with the uplink data. Further, PUSCH, the channel state information only, or may be used to transmit only the HARQ-ACK and channel state information.
[0089]
　PRACH is a physical channel used for transmitting the random access preamble. PRACH may be the terminal device 2 is used to synchronize the time domain base station apparatus 1. Further, PRACH, the initial connection establishment (initial connection establishment) procedure (process), a handover procedure, connections restructuring (connection re-establishment) procedures, synchronization (timing adjustment) for the uplink transmission, and / or a request for PUSCH resources It is also used to indicate a.
[0090]
　In PUCCH region, a plurality of PUCCH is frequency, time, and spatial and / or code multiplexing. In PUSCH region, a plurality of PUSCH frequency, time, or may be spatially and / or code multiplexing. PUCCH and PUSCH are frequency, time, or may be spatially and / or code multiplexing. PRACH may be disposed over a single sub-frame or sub-frame. A plurality of PRACH may be code-multiplexed.
[0091]
　　
　uplink DMRS is associated with the transmission of the PUSCH or PUCCH. DMRS is multiplexed PUSCH or PUCCH and time. The base station apparatus 1 may use DMRS to perform propagation path compensation of the PUSCH or PUCCH. In the description of this embodiment, the transmission of the PUSCH also includes multiplexed and transmitted PUSCH and DMRS. In the description of this embodiment, PUCCH transmission also includes transmitting by multiplexing PUCCH and DMRS. In addition, the uplink DMRS is also referred to as UL-DMRS. SRS is not related to the transmission of the PUSCH or PUCCH. The base station apparatus 1 may use SRS to measure channel state of the uplink.
[0092]
　SRS is transmitted with the last SC-FDMA symbols in the uplink subframe. That, SRS is arranged at the end of the SC-FDMA symbols in the uplink subframe. The terminal apparatus 2, the SC-FDMA symbols of a cell, can limit the SRS, PUCCH, the simultaneous transmission of the PUSCH and / or PRACH. The terminal apparatus 2, in the uplink sub-frame with a cell, its using SC-FDMA symbols except the last SC-FDMA symbol in uplink subframe to transmit the PUSCH and / or PUCCH, the uplink sub it can transmit the SRS by using the last SC-FDMA symbols in a frame. That is, in an uplink subframe of a cell, the terminal device 2 can transmit the SRS, and PUSCH and PUCCH, the.
[0093]
　　
　resource element group (REG: Resource Element Group) is used to define the mapping of the resource elements and a control channel. For example, REG is used PDCCH, PHICH or mapping PCFICH,. REG is the same OFDM symbol, in the same resource block consists of four consecutive resource elements not used for CRS. Further, REG is comprised of first OFDM symbol in the first slot within a subframe in the fourth OFDM symbol.
[0094]
　Expanded resource element group (EREG: Enhanced Resource Element Group) is used to define the mapping of the extended control channel resource elements. For example, EREG is used for mapping EPDCCH. One resource block pair is composed of 16 of EREG. Each EREG are numbered from 0 to 15 for each resource block pair. Each EREG, in one resource block pair, composed of nine resource element except for resource elements used for DM-RS associated with EPDCCH.
[0095]
　　
　Fig. 8 is a schematic block diagram showing a configuration of a base station apparatus 1 of the present embodiment. As shown, the base station apparatus 1 is configured to include higher layer processing unit 101, the control unit 103, receiving unit 105, transmitting unit 107, and transmitting and receiving antenna 109, a. The receiving unit 105, decoding unit 1051, a demodulation unit 1053, the demultiplexing unit 1055, configured to include a radio reception unit 1057, and the channel measurement unit 1059. Also configured transmission section 107, coding section 1071, modulation section 1073, multiplexing section 1075, the radio transmission unit 1077, and include a downlink reference signal generating unit 1079. Incidentally, the upper layer processing unit 101 may be included in the control unit.
[0096]
　As already described, the base station apparatus 1 can support one or more RAT. Some or all of the components included in the base station apparatus 1 shown in FIG. 8 can be configured individually in accordance with the RAT. For example, the receiving unit 105 and the transmitting unit 107 is configured separately for the LTE and NR. Further, in the NR cell, some or all of the components included in the base station apparatus 1 shown in FIG. 8 can be configured individually in accordance with the parameter set for the transmission signal. For example, in certain NR cell, the radio reception unit 1057 and radio transmission unit 1077 may be configured individually in accordance with the parameter set for the transmission signal.
[0097]
　Higher layer processing unit 101, the medium access control (MAC: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: RLC) layer, a radio resource control (Radio Resource Control: performing processing RRC) layer. Also, higher layer processing unit 101 generates control information for controlling the receiving unit 105 and the transmitting unit 107, and outputs to the control unit 103.
[0098]
　Control unit 103, based on control information from the higher layer processing unit 101 controls the receiving unit 105 and the transmitting unit 107. Control unit 103 generates control information to the higher layer processing unit 101, and outputs to the upper layer processing unit 101. Control unit 103 inputs the channel estimation results from the decoded signal and the channel measurement unit 1059 from the decoding unit 1051. Control unit 103 outputs a signal for encoding to the encoding section 1071. The control unit 103 is used to control all or part of the base station apparatus 1.
[0099]
　Higher layer processing unit 101, RAT control, radio resource control, subframe configuration, scheduling control, and / or performs processing and management relating to CSI reporting control. Processing and management in the higher layer processing unit 101 is performed in the terminal apparatus common connecting each terminal device, or the base station apparatus. Processing and management in the higher layer processing unit 101 may be performed only by the higher layer processing unit 101 may acquire from the upper node or another base station apparatus. The processing and management in the higher layer processing unit 101 may be performed individually in accordance with the RAT. For example, upper layer processing section 101 performs a processing and management in LTE, the processing and management in the NR separately.
[0100]
　In RAT control in higher layer processing unit 101, management related RAT is performed. For example, in RAT control, management related to the management and / or NR about LTE is performed. Management of the NR, including setting and processing parameters set for transmitting signals in the NR cell.
[0101]
　In the radio resource control in the upper layer processing unit 101, downlink data (transport block), system information, RRC message (RRC parameters), and / or, MAC control elements: generation and / or management of (CE Control Element) It takes place.
[0102]
　The subframe configuration in the upper layer processing unit 101, a sub-frame set, a subframe pattern setting, uplink - downlink setting, uplink reference UL-DL configuration and / or management a row for downlink reference UL-DL Configuration divide. Note that subframe configuration in the upper layer processing unit 101, also referred to as a base station sub-frame configuration. The sub-frame set in the higher layer processing unit 101 may be determined based on the traffic volume of traffic and the downlink uplink. The sub-frame set in the higher layer processing unit 101 may be determined based on the scheduling result of the scheduling control in higher layer processing unit 101.
[0103]
　Scheduling control in higher layer processing unit 101, based on such a quality estimate and the channel of the propagation path input from the channel state information and the channel measurement unit 1059 has received, the frequency and the sub-frame allocate a physical channel, a physical channel such as code rate and modulation scheme and transmission power are determined. For example, the control unit 103, based on the scheduling result of the scheduling control in higher layer processing unit 101 generates control information (DCI format).
[0104]
　In CSI reporting control in the upper layer processing unit 101, CSI reporting of the terminal device 2 is controlled. For example, settings for CSI reference resource for assumed for calculating the CSI in the terminal device 2 is controlled.
[0105]
　Receiving unit 105 under the control of the control unit 103 receives a signal transmitted from the terminal device 2 through the transmitting and receiving antenna 109, further separation, demodulation, performs reception processing such as decoding, the information reception process and outputs to the control unit 103. The reception process in the reception unit 105, predefined set or base station apparatus 1, is performed based on the set notified to the terminal device 2.
[0106]
　Radio reception section 1057, with respect to the uplink signal received through the transmitting and receiving antenna 109, converted to an intermediate frequency (down-conversion), removal of unwanted frequency components, so that the signal level is appropriately maintained control of amplification level, quadrature demodulation based on in-phase and quadrature components of the received signal, converted to a digital signal from an analog signal, the guard interval: removal of (guard interval GI), and / or a fast Fourier transform (fast Fourier Transform: for extracting a frequency domain signal by FFT).
[0107]
　Demultiplexing unit 1055, from the signal inputted from radio receiving section 1057, separates the uplink channel and / or uplink reference signals such as PUCCH or PUSCH. Demultiplexing unit 1055 outputs the uplink reference signal to the channel measurement unit 1059. Demultiplexing unit 1055, the estimated value of the propagation path input from the channel measurement unit 1059 performs channel compensation of for the uplink channel.
[0108]
　Demodulation unit 1053, the modulated symbols of the uplink channel, BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, received signal using a modulation scheme such as 256QAM It performs demodulation of. Demodulation unit 1053 performs separation and demodulation of the uplink channel which is MIMO multiplexed.
[0109]
　Decoding unit 1051, the coded bits of the demodulated uplink channel, performs a decoding process. The decoded uplink data and / or uplink control information has is output to the control unit 103. Decoding unit 1051, for the PUSCH, performs decoding processing for each transport block.
[0110]
　Channel measurement unit 1059, such as by measuring the estimated value and / or the channel quality of the channel from the uplink reference signal input from the demultiplexing unit 1055, and outputs to the demultiplexing unit 1055 and / or the control unit 103. For example, UL-DMRS measures the estimated value of the propagation path to perform channel compensation for the PUCCH or PUSCH, SRS measures the quality of the channel in the uplink.
[0111]
　Transmitting unit 107 under the control of the control unit 103, with respect to downlink control information and downlink data input from the higher layer processing unit 101, encoding, transmission processing such as modulation and multiplexing. For example, the transmission unit 107, PHICH, PDCCH, EPDCCH, PDSCH, and generates and multiplexes the downlink reference signal to generate a transmission signal. The transmission processing in the transmission section 107, predefined set, setting the base station apparatus 1 is notified to the terminal device 2, or on the basis of the set to be notified through PDCCH or EPDCCH transmitted in the same subframe It takes place.
[0112]
　Encoding unit 1071, is input from the control unit 103 HARQ indicator (HARQ-ACK), the downlink control information, and the downlink data, block coding, convolutional coding, predetermined coding such as turbo coding encoding is performed by using the method. Modulation unit 1073 modulates the coded bits input from the encoding unit 1071 BPSK, QPSK, 16QAM, 64QAM, a predetermined modulation scheme such as 256QAM. Downlink reference signal generating unit 1079, a physical cell identifier (PCI: Physical cell identification), and the like based on RRC parameters set in the terminal device 2, generates a downlink reference signal. Multiplexing unit 1075, a modulation symbol and downlink reference signals of each channel are multiplexed and arranged in a predetermined resource elements.
[0113]
　Radio transmission section 1077, to the signal from the multiplexing unit 1075, an inverse fast Fourier transform (Inverse Fast Fourier Transform: IFFT) conversion to a signal in the time domain by the addition of a guard interval, generation of the digital baseband signal, conversion to an analog signal, quadrature modulation, conversion from intermediate frequency signal to a high frequency signal (up-conversion: Stay up-the convert), removal of unnecessary frequency components, performs processing such as power amplification, to generate a transmission signal . Transmission signal radio transmitting section 1077 is output is transmitted from the transmitting and receiving antenna 109.
[0114]
　　
　FIG. 9 is a schematic block diagram showing the configuration of the terminal device 2 of this embodiment. As illustrated, the terminal device 2 is configured higher layer processing unit 201, the control unit 203, receiving unit 205, including a transmission unit 207 and the transmitting and receiving antenna 209,. The receiving unit 205, decoding unit 2051, a demodulation unit 2053, the demultiplexing unit 2055, configured to include a radio reception unit 2057, and the channel measurement unit 2059. Also configured transmission section 207, coding section 2071, modulation section 2073, multiplexing section 2075, the radio transmission unit 2077, and includes an uplink reference signal generation unit 2079. Incidentally, the upper layer processing unit 201 may also be included in the control unit.
[0115]
　As already described, the terminal device 2 can support more than one RAT. Some or all of the components included in the terminal device 2 shown in FIG. 9 may be configured separately depending on the RAT. For example, the receiving unit 205 and the transmitting unit 207 is configured separately for the LTE and NR. Further, in the NR cell, some or all of the components included in the terminal device 2 shown in FIG. 9 may be configured separately according to the parameter set for the transmission signal. For example, in certain NR cell, the radio reception unit 2057 and radio transmission unit 2077 may be configured individually in accordance with the parameter set for the transmission signal.
[0116]
　Higher layer processing unit 201, the uplink data (transport block), and outputs to the control unit 203. Higher layer processing unit 201, the medium access control (MAC: Medium Access Control) layer, a packet data integration protocol (Packet Data Convergence Protocol: PDCP) layer, a radio link control (Radio Link Control: RLC) layer, a radio resource control (Radio Resource Control: RRC) performs processing of the layer. Also, higher layer processing unit 201 generates control information for controlling the receiving unit 205, and the transmitting unit 207, and outputs to the control unit 203.
[0117]
　Control unit 203, based on control information from the higher layer processing unit 201, controls the reception unit 205 and transmission unit 207. Control unit 203 generates control information to the higher layer processing unit 201, and outputs to the upper layer processing unit 201. Control unit 203 inputs the channel estimation results from the decoded signal and the channel measurement unit 2059 from the decoding unit 2051. Control unit 203 outputs a signal for encoding to the encoding section 2071. The control unit 203 may be used to control all or part of the terminal device 2.
[0118]
　Higher layer processing unit 201, RAT control, radio resource control, subframe configuration, scheduling control, and / or the processing and management of CSI reporting control performed. Processing and management in the higher layer processing unit 201 sets defined in advance, and / or is made based on the setting based on the control information set or notified from the base station apparatus 1. For example, the control information from the base station apparatus 1 includes RRC parameters, the MAC control element or DCI. The processing and management in the higher layer processing unit 201 may be performed individually in accordance with the RAT. For example, higher layer processing unit 201 performs the processing and management in LTE, the processing and management in the NR separately.
[0119]
　In RAT control in higher layer processing unit 201, management related RAT is performed. For example, in RAT control, management related to the management and / or NR about LTE is performed. Management of the NR, including setting and processing parameters set for transmitting signals in the NR cell.
[0120]
　In the radio resource control in the upper layer processing unit 201, the management configuration information in the device itself is performed. In the radio resource control in the upper layer processing unit 201, the uplink data (transport block), system information, RRC message (RRC parameters), and / or, MAC control elements: generation and / or management of (CE Control Element) It takes place.
[0121]
　The subframe configuration in the upper layer processing unit 201, a sub-frame set in the different base station apparatus and the base station apparatus 1 and / or the base station apparatus 1 is managed. Subframe configuration, the setting of the uplink or downlink for the sub-frame, subframe pattern setting, uplink - including downlink setting, uplink reference UL-DL configuration, and / or, a downlink reference UL-DL configuration. Note that subframe configuration in the upper layer processing unit 201, also referred to as terminal subframe configuration.
[0122]
　Scheduling control in higher layer processing unit 201, based on the DCI (scheduling information) from the base station apparatus 1, the control information for performing control related to scheduling for the receiving unit 205 and the transmission unit 207 is generated.
[0123]
　In CSI reporting control in the upper layer processing unit 201, control is performed for reporting CSI to the base station apparatus 1. For example, the CSI report control, settings related to CSI reference resource for assumed to calculate the CSI with channel measurement unit 2059 is controlled. The CSI report control, based on the DCI and / or RRC parameters, control resources (timing) used to report CSI.
[0124]
　Information receiving unit 205, which under control of the control unit 203 receives a signal transmitted from the base station apparatus 1 via the transmitting and receiving antenna 209, further separation, demodulation, performs reception processing such as decoding, the received processed and outputs to the control unit 203. The reception processing in the receiver unit 205 is performed based on the notification or setting from predefined set or base station apparatus 1,.
[0125]
　Radio reception section 2057, with respect to the uplink signal received via the transmitting and receiving antenna 209, converted to an intermediate frequency (down-conversion), removal of unwanted frequency components, so that the signal level is appropriately maintained control of amplification level, quadrature demodulation based on in-phase and quadrature components of the received signal, converted to a digital signal from an analog signal, the guard interval: removal of (guard interval GI), and / or a fast Fourier transform (fast Fourier Transform: the extraction of the signal in the frequency domain by FFT).
[0126]
　Demultiplexing unit 2055, from the signal inputted from radio receiving section 2057, separates PHICH, PDCCH, downlink channels such as EPDCCH or PDSCH, a downlink synchronization signal and / or the downlink reference signal. Demultiplexing unit 2055 outputs the downlink reference signal to the channel measurement unit 2059. Demultiplexing unit 2055, the estimated value of the propagation path input from the channel measurement unit 2059 performs channel compensation of for the downlink channel.
[0127]
　Demodulator 2053 performs the modulated symbols of the downlink channel, BPSK, QPSK, 16QAM, 64QAM, the demodulation of the received signal using a modulation scheme such as 256QAM. Demodulator 2053 performs separation and demodulation of downlink channels that are MIMO multiplexed.
[0128]
　Decoding unit 2051, the coded bits of the downlink channel which is demodulated, performs a decoding process. Downlink data and / or downlink control information decoded is output to the control unit 203. Decoding unit 2051, for the PDSCH, performs decoding processing for each transport block.
[0129]
　Channel measurement unit 2059, such as by measuring the estimated value and / or the channel quality of the channel from the downlink reference signal input from the demultiplexing unit 2055, and outputs to the demultiplexing unit 2055 and / or the control unit 203. Downlink reference signal channel measurement unit 2059 is used for measurement may be determined based on the transmission mode and / or other RRC parameters are set by at least RRC parameters. For example, DL-DMRS measures the estimated value of the propagation path to perform channel compensation for the PDSCH or EPDCCH. CRS is the estimated value of the propagation path to perform channel compensation for the PDCCH or PDSCH, and / or measures the channel in the downlink for reporting CSI. CSI-RS measures the channel in the downlink for reporting CSI. Channel measurement unit 2059, CRS, based on the CSI-RS or detection signals, calculates the RSRP (Reference Signal Received Power) and / or RSRQ (Reference Signal Received Quality), and outputs to the upper layer processing unit 201.
[0130]
　The transmission unit 207 is performed according to control of the control unit 203, with respect to uplink control information and uplink data input from the higher layer processing unit 201, encoding, transmission processing such as modulation and multiplexing. For example, the transmission unit 207 generates and multiplexes the uplink channel and / or uplink reference signals such as PUSCH or PUCCH, to generate a transmission signal. The transmission processing in the transmission section 207, pre-defined set, or is made based on the set or notified from the base station apparatus 1.
[0131]
　Encoding unit 2071, is input from the control unit 203 HARQ indicator (HARQ-ACK), the uplink control information, and the uplink data, block coding, convolutional coding, predetermined coding such as turbo coding encoding is performed by using the method. Modulation unit 2073 modulates the coded bits input from the encoding unit 2071 BPSK, QPSK, 16QAM, 64QAM, a predetermined modulation scheme such as 256QAM. Uplink reference signal generating unit 2079, based on such a RRC parameters set in the terminal device 2, generates an uplink reference signal. Multiplexing unit 2075, a modulation symbol and uplink reference signals of each channel are multiplexed and arranged in a predetermined resource elements.
[0132]
　Radio transmission section 2077, to the signal from the multiplexing unit 2075, an inverse fast Fourier transform (Inverse Fast Fourier Transform: IFFT) conversion to a signal in the time domain by the addition of a guard interval, generation of the digital baseband signal, conversion to an analog signal, quadrature modulation, conversion from intermediate frequency signal to a high frequency signal (up-conversion: Stay up-the convert), removal of unnecessary frequency components, performs processing such as power amplification, to generate a transmission signal . Transmission signal radio transmitting section 2077 is output is transmitted from the transmitting and receiving antenna 209.
[0133]
　　
　base station apparatus 1 and terminal apparatus 2, the signaling of the respective control information (notification, notification, set) for, can be used a variety of methods. Signaling control information may be performed in different layers (layers). Signaling control information includes physical layer physical layer signaling is a signaling through (layer), RRC signaling is a signaling through the RRC layer, and the like MAC signaling is a signaling through the MAC layer. RRC signaling is dedicated RRC signaling for notifying the specific control information to the terminal device 2 (Dedicated RRC signaling), or is the common RRC signaling for notifying the specific control information to the base station apparatus 1 (Common RRC signaling) . Such as RRC signaling or MAC signaling, signaling an upper layer is used as viewed from the physical layer it is also called high layer signaling.
[0134]
　RRC signaling is achieved by signaling the RRC parameters. MAC signaling is achieved by signaling the MAC Control element. Physical layer signaling is downlink control information (DCI: Downlink Control Information) or uplink link control information: the (UCI Uplink Control Information) is achieved by signaling. RRC parameters and MAC Control element is transmitted by using the PDSCH or PUSCH. DCI is transmitted using the PDCCH or EPDCCH. UCI is transmitted using the PUCCH or PUSCH. RRC signaling and MAC signaling is used to signal the quasi-static (semi-static) control information, also referred to as quasi-static signaling. Physical layer signaling, dynamic (dynamic) control information used for signaling, also referred to as dynamic signaling. DCI is used for such scheduling scheduling or PUSCH for PDSCH. The UCI, CSI reporting, HARQ-ACK reporting and / or scheduling request: used, such as for (SR Scheduling Request).
[0135]
　　
　DCI is notified using the DCI format with fields defined in advance. Fields defined in DCI format, predetermined information bits are mapped. The DCI downlink scheduling information, uplink scheduling information, side links scheduling information, requests aperiodic CSI reporting, or notifies the uplink transmission power command.
[0136]
　DCI format which the terminal device 2 monitors is determined by the transmission mode set for each serving cell. That is, a part of the DCI format which the terminal device 2 monitors can vary from transmission mode. For example, the terminal device 2 downlink transmission mode 1 is set, monitor the DCI format 1A and DCI format 1. For example, the terminal device 2 downlink transmission mode 4 has been set, monitor the DCI format 1A and the DCI format 2. For example, the terminal device 2 uplink transmission mode 1 is set, monitor the DCI format 0. For example, the terminal device 2 uplink transmission mode 2 is set, monitor the DCI format 0 and DCI format 4.
[0137]
　Regulatory region PDCCH is arranged to notify the DCI for the terminal device 2 is not notified, the terminal device 2 detects the DCI for the terminal device 2 by blind decoding (blind detection). Specifically, the terminal device 2, the serving cell, to monitor a set of PDCCH candidates. Monitoring, for each of the PDCCH in the set, means to attempt to decode the DCI formats all monitors. For example, the terminal device 2, all of the aggregation level that may be transmitted to the terminal device 2, PDCCH candidate and attempts to decode the DCI format. Terminal 2 recognizes DCI decoding (detection) was successfully (PDCCH) as DCI (PDCCH) to the terminal device 2.
[0138]
　Relative DCI, cyclic redundancy check (CRC: Cyclic Redundancy Check) is added. CRC is used for error detection and DCI blind detection of DCI. CRC (CRC parity bits) is scrambled by the RNTI (Radio Network Temporary Identifier). Terminal device 2 on the basis of the RNTI, to detect whether DCI for the terminal device 2. Specifically, the terminal device 2, the bit corresponding to the CRC, performs descrambling with a predetermined RNTI, to extract the CRC, to detect whether the corresponding DCI is correct.
[0139]
　RNTI is defined or set in accordance with the purpose and application of DCI. RNTI is, C-RNTI (Cell-RNTI), SPS C-RNTI (Semi Persistent Scheduling C-RNTI), SI-RNTI (System Information-RNTI), P-RNTI (Paging-RNTI), RA-RNTI (Random Access -RNTI), TPC-PUCCH-RNTI (Transmit Power Control-PUCCH-RNTI), TPC-PUSCH-RNTI (Transmit Power Control-PUSCH-RNTI), temporary C-RNTI, M-RNTI (MBMS (Multimedia Broadcast Multicast Services ) -RNTI), and, including the eIMTA-RNTI.
[0140]
　C-RNTI and SPS C-RNTI is a terminal device 2 in the base station apparatus 1 in the (cell) is a unique RNTI, an identifier for identifying the terminal device 2. C-RNTI is used to schedule the PDSCH or PUSCH in one subframe. SPS C-RNTI is used to periodic scheduling activation or release resources for PDSCH or PUSCH. Control channel having a scrambled CRC in SI-RNTI is used to schedule SIB (System Information Block). Control channel having a scrambled CRC in P-RNTI is used to control the paging. Control channel having a scrambled CRC in RA-RNTI is used to schedule a response to RACH. Control channel having a scrambled CRC in TPC-PUCCH-RNTI is used to perform the power control of the PUCCH. Control channel having a scrambled CRC in TPC-PUSCH-RNTI is used to perform the power control of the PUSCH. Temporary control channel having a scrambled CRC in C-RNTI is used by the mobile station device is C-RNTI is not set or recognized. Control channel having a scrambled CRC in M-RNTI is used to schedule the MBMS. Control channel having a scrambled CRC in eIMTA-RNTI, in the dynamic TDD (eIMTA), used for notifying the information about the TDD UL / DL Configuration of TDD serving cell. The present invention is not limited to the above RNTI, it may be DCI format with the new RNTI is scrambled.
[0141]
　Scheduling information (downlink scheduling information, uplink scheduling information, side links scheduling information), as the scheduling of the frequency domain, including information for performing scheduling resource block or resource block group to the unit. Resource block group is a set of contiguous resource blocks indicates the resources allocated for the terminal apparatus to be scheduled. The size of the resource block group is dependent on the system bandwidth.
[0142]
　　 DCI is transmitted using a control channel such as PDCCH or EPDCCH. Terminal device 2 monitors the one or more sets of PDCCH candidates Activating been serving cell and / or EPDCCH set of candidate set by RRC signaling. Here, the monitoring is to attempt to decode PDCCH and / or EPDCCH in the set corresponding to the DCI format to be all monitors.
[0143]
　Set of the set or the EPDCCH candidate of PDCCH candidates are also referred to as a search space. The search space, shared search space (CSS) and the terminal-specific search space (USS) is defined. CSS may be defined only for the search space on the PDCCH.
[0144]
　CSS (Common Search Space) is a search space that is set on the basis of specific parameters and / or predefined parameters to the base station apparatus 1. For example, CSS is a search space used in common by a plurality of terminal devices. Therefore, the base station apparatus 1 by mapping the common control channel by a plurality of terminal devices to CSS, resources for transmitting is reduced control channel.
[0145]
　USS (UE-specific Search Space) is a search space that is set using the parameters specific to at least the terminal device 2. Therefore, USS is a unique search spaces on the terminal device 2 can transmit individual-specific control channel to the terminal apparatus 2. Therefore, the base station apparatus 1 can efficiently mapping specific control channels to a plurality of terminal devices.
[0146]
　USS may be set to be used in common to a plurality of terminal devices. For common USS is set to a plurality of terminal devices, parameters specific to the terminal apparatus 2 is set to be the same value among the plurality of terminal devices. For example, unit set to the same parameters between the plurality of terminal devices, cell, and the like transmission point or a group of a predetermined terminal device.
[0147]
　Search space of aggregation level each is defined by a set of PDCCH candidates. Each PDCCH, are transmitted using a set of one or more CCE (Control Channel Element). The number of CCE used for one PDCCH is also aggregation level is referred. For example, the number of CCE's used for one PDCCH is 1, 2, 4 or 8.
[0148]
　Search space of aggregation level each is defined by a set of EPDCCH candidate. Each EPDCCH, is transmitted using a set of one or more ECCE (Enhanced Control Channel Element). The number of ECCE used in one EPDCCH is also aggregation level is referred. For example, the number of ECCE used in one EPDCCH is 1,2,4,8,16 or 32.
[0149]
　Count of the number or EPDCCH candidates PDCCH candidates is determined based on at least the search space and aggregation level. For example, in CSS, the number of PDCCH candidates in aggregation level 4, and 8 are respectively 4 and 2. For example, in the USS, the number of PDCCH candidates in aggregation 1, 2, 4, and 8 are each 6,6,2 and 2.
[0150]
　Each ECCE is composed of a plurality of EREG (Enhanced resource element group). EREG is used to define the mapping for resource elements EPDCCH. In each RB pair are numbered from 0 to 15, 16 EREG is defined. That is, in each RB pair, EREG0 ~ EREG15 are defined. In each RB pair, EREG0 ~ EREG15, relative to resource elements other than resource elements in which a predetermined signal and / or channel is mapped, in favor of a frequency direction, it is periodically defined. For example, resource elements demodulation reference signal associated with the EPDCCH transmitted on antennas ports 107-110 is mapped does not define the EREG.
[0151]
　The number of ECCE used in one EPDCCH depends on EPDCCH format is determined based on other parameters. The number of ECCE used in one EPDCCH is also aggregation level is referred. For example, the number of ECCE used in one EPDCCH the number of resource elements which can be used for EPDCCH transmission in one RB pair based the like on the transmission method of EPDCCH, is determined. For example, the number of ECCE used in one EPDCCH is 1,2,4,8,16 or 32. The number of EREG used in one ECCE is determined based on the type and the type of cyclic prefix sub-frame, 4 or 8. Method of transmitting the EPDCCH, distributed transmission (Distributed Transmission) and localized transmission (the Localized Transmission) is supported.
[0152]
　EPDCCH may use distributed transmission or localized transmission. Distributed transmission and localized transmission, the mapping of ECCE is different for EREG and RB pair. For example, in a distributed transmission, one ECCE is constructed of a EREG multiple RB pairs. In localized transmission, one ECCE is constructed of a EREG one RB pair.
[0153]
　The base station apparatus 1 to the terminal device 2 performs the setting for EPDCCH. Terminal device 2, based on the setting from the base station apparatus 1, for monitoring a plurality of EPDCCH. Set of RB pairs terminal device 2 for monitoring the EPDCCH can be set. Set of RB pair are referred to as EPDCCH set or EPDCCH-PRB set. To one of the terminal device 2 can be set more than one EPDCCH set. Each EPDCCH set consists of one or more RB pairs. Also, settings for EPDCCH can be performed separately for each EPDCCH set.
[0154]
　The base station apparatus 1 to the terminal device 2, can be set EPDCCH set of a predetermined number. For example, EPDCCH set up to two, as EPDCCH set 0 and / or EPDCCH set 1 can be set. Each EPDCCH set, can be constituted by a predetermined number of RB pairs. Each EPDCCH set constitute one set of ECCE. The number of ECCE constructed in one EPDCCH sets, the number of RB pairs is set as the EPDCCH set, and, based on the number of EREG used in one ECCE, it is determined. If the number of ECCE constructed in one EPDCCH sets is N, each EPDCCH set constitutes the ECCE, numbered 0 ~ N-1. For example, when the number of EREG used in one ECCE is 4, the EPDCCH set composed of four RB pairs constituting 16 ECCE.
[0155]
　　
　terminal device 2 includes a plurality of cells are set, it is possible to perform multi-carrier transmission. Communication terminal device 2 uses a plurality of cells is referred to as CA (carrier aggregation) or DC (dual connectivity). The contents described in this embodiment can be applied to each or some of the plurality of cells to be set to the terminal device 2. The cells that are set in the terminal apparatus 2, also referred to as the serving cell.
[0156]
　CA Oite, a plurality of serving cells to be set, one primary cell and a:: (Secondary Cell SCell) (PCell Primary Cell) and one or more secondary cells. The terminal device 2 that supports CA, one of the primary cell and one or more secondary cells may be set.
[0157]
　Primary cell, the initial connection establishment (initial connection establishment) procedure is performed serving cell connection rebuild (connection re-establishment) serving to start the process, or a cell that has been indicated as the primary cell in the handover procedure. Primary cell, the operation on the primary frequency. Secondary cell may be set after construction or reconstruction of the connection. Secondary cell, the operation in the secondary frequency. It should be noted that the connection is also referred to as RRC connection.
[0158]
　DC is an operation of the radio resource specified terminal device 2 consumes provided from at least two different network point. Network point, the master base station (MeNB: Master eNB) and secondary base station apparatus: a (SeNB Secondary eNB). Dual connectivity, the terminal device 2 is to perform an RRC connection with at least two network points. In dual connectivity, two networks points may be connected by a non-ideal backhaul (non-ideal backhaul).
[0159]
　In DC, is connected to at least S1-MME (Mobility Management Entity), it referred to serving base station apparatus 1 of the core network mobility anchor as the master base station device. Also referred to the base station apparatus 1 is not a master base station apparatus which provides an additional radio resource to the terminal device 2 and the secondary base station device. Groups of the serving cell that is associated with the master base station device, a master cell group (MCG: Master Cell Group) also is referred. Groups of the serving cell which are associated with secondary base station apparatus, the secondary cell group (SCG: Secondary Cell Group) also is referred.
[0160]
　In DC, the primary cell belongs to the MCG. Also, in SCG, a secondary cell corresponding to the primary cell primary secondary cell (PSCell: Primary Secondary Cell) and referred. The PSCell (base station apparatus constituting the PSCell), the same functions as PCell (base station apparatus constituting the PCell) (capacity, performance) may be supported. In addition, the PSCell, only some of the functions of the PCell may be supported. For example, the PSCell, using different search space and CSS or USS, function for PDCCH transmission may be supported. In addition, PSCell may always be in a state of activation. Further, PSCell is a cell that can receive PUCCH.
[0161]
　In DC, radio bearer (data radio bearer (DRB: Date Radio Bearer), and / or signaling radio bearer (SRB: Signaling Radio Bearer)) may be assigned individually by the MeNB and SeNB. Against MCG (PCell) and SCG (PSCell), may each be set individually duplex mode. MCG (PCell) and SCG (PSCell) may not be synchronized with each other. Against MCG (PCell) and SCG (PSCell), parameters for the plurality of timing adjustment (TAG: Timing Advance Group) may be set independently. In dual connectivity, the terminal device 2, the UCI for a cell in an MCG transmitted only MeNB (PCell), transmitting the UCI for a cell in SCG only SeNB (pSCell). In the transmission of each of UCI, transmission method using PUCCH and / or PUSCH is applied in each cell group.
[0162]
　PUCCH and PBCH (MIB) is transmitted only in PCell or PSCell. Further, PRACH, as long as the plurality of TAG (Timing Advance Group) is not set between the cells in the CG, it is transmitted only in PCell or PSCell.
[0163]
　In PCell or PSCell, it may be performed SPS (Semi-Persistent Scheduling) and DRX (Discontinuous Transmission). In the secondary cell, it may be subjected to the same DRX as the PCell or PSCell of the same cell group.
[0164]
　In the secondary cell, the information / parameters related to setting of the MAC is covalently basically, the same cell group PCell or PSCell. Some of the parameters may be set for each secondary cell. Some of the timer or counter, may be applied to only PCell or PSCell.
[0165]
　In CA, the cell cell and FDD scheme TDD scheme is applied is applied may be aggregated. If the cell TDD cell and FDD is that is applied is applied are aggregated, it is possible to apply the present disclosure with respect to one of the cells where the cell and FDD TDD is applied is applied.
[0166]
　Terminal device 2, information indicating a combination of a band CA is supported by the terminal device 2, and transmits to the base station apparatus 1. The terminal apparatus 2, for each of combinations of the band, information indicating whether it supports the simultaneous transmission and reception of the plurality of serving cells in the different bands, and transmits to the base station apparatus 1.
[0167]
　　
　The base station apparatus 1, as a method for resource allocation of PDSCH and / or PUSCH to the terminal device 2, can be used several ways. The method of resource allocation include dynamic scheduling, semi-persistent scheduling, multi-subframe scheduling, and cross subframe scheduling.
[0168]
　In dynamic scheduling, one DCI performs resource allocation in one subframe. Specifically, PDCCH or EPDCCH in a certain sub-frame, performs scheduling for PDSCH in that subframe. PDCCH or EPDCCH in a certain sub-frame, performs scheduling for PUSCH in a given subframe after that sub-frame.
[0169]
　In the multi-subframe scheduling, one DCI performs resource allocation in one or more sub-frames. Specifically, PDCCH or EPDCCH in a certain sub-frame, performs scheduling for PDSCH in one or more sub-frames after the predetermined number than the sub-frame. PDCCH or EPDCCH in a certain sub-frame, performs scheduling for PUSCH in one or more sub-frames after the predetermined number than the sub-frame. The predetermined number may be an integer greater than or equal to zero. The predetermined number may be predefined, may be determined on the basis of the physical layer signaling and / or RRC signaling. In the multi-subframe scheduling may be contiguous subframes Scheduling, subframe having a predetermined period may be scheduled. The number of subframes to be scheduled may be predefined, may be determined on the basis of the physical layer signaling and / or RRC signaling.
[0170]
　In cross subframe scheduling, one DCI performs resource allocation in one subframe. Specifically, PDCCH or EPDCCH in a certain sub-frame, performs scheduling for PDSCH in one sub-frame after the predetermined number than the sub-frame. PDCCH or EPDCCH in a certain sub-frame, performs scheduling for PUSCH in one subframe after the predetermined number than the sub-frame. The predetermined number may be an integer greater than or equal to zero. The predetermined number may be predefined, may be determined on the basis of the physical layer signaling and / or RRC signaling. In cross subframe scheduling may be contiguous subframes Scheduling, subframe having a predetermined period may be scheduled.
[0171]
　In semi-persistent scheduling (SPS), one DCI performs resource allocation in one or more sub-frames. The terminal apparatus 2, information about the SPS is configured by RRC signaling, when detecting a PDCCH or EPDCCH to enable SPS, to enable processing regarding SPS, given PDSCH and / or on the basis of the settings relating to SPS PUSCH to receive. Terminal device 2, if the SPS finds the PDCCH or EPDCCH to release the SPS when it is effective, the SPS release (disable) to stop the reception of the predetermined PDSCH and / or PUSCH. SPS release may be performed on the basis of when a predetermined condition is satisfied. For example, when receiving the data of a predetermined number of empty transmission, SPS is released. Empty transmission of data to release the SPS corresponds to MAC PDU including zero MAC SDU (Service Data Unit) (Protocol Data Unit).
[0172]
　Information about the SPS by RRC signaling, SPS C-RNTI is an RNTI of SPS, information about the period (interval) to be scheduled for PDSCH, information on the period (interval) to be scheduled for PUSCH, on setting for releasing the SPS information, and / or a number of HARQ processes in SPS. SPS is supported only on the primary cell and / or primary secondary cell.
[0173]
　　
　FIG. 10 is a diagram showing an example of an LTE downlink resource element mapping in the present embodiment. In this example, in the case the number of OFDM symbols one resource block and one slot is 7, the set of resource elements are shown in one resource block pair. Also, seven OFDM symbols in the first half in the time direction in the resource block pair, slot 0 (the first slot) also is referred. 7 OFDM symbols in the second half in the time direction of a resource block pair, slot 1 (second slot) also is referred. Further, each of the OFDM symbols in each slot (resource blocks), represented by OFDM symbol numbers 0-6. Further, each of the frequency direction of a sub-carrier in the resource block pair, indicated by subcarrier numbers 0 to 11. Incidentally, when the system bandwidth is constituted by a plurality of resource blocks, the sub-carrier number is assigned differently across the system bandwidth. For example, the system bandwidth can consist of six resource blocks, subcarriers subcarrier numbers 0 to 71 is assigned are used. In the description of this embodiment, the resource elements (k, l) is a resource elements indicated by subcarrier number k and the OFDM symbol number l.
[0174]
　Resource elements indicated by R0 ~ R3 are each shows a cell-specific reference signal of the antenna ports 0-3. In the following, the cell-specific reference signal of the antenna ports 0-3 are also referred to as CRS (Cell-specific RS). In this example, CRS is the case of four antenna ports can be varied in number. For example, CRS may use one antenna port or two antenna ports. Further, CRS can be based on the cell ID, and shifts the frequency direction. For example, CRS can be based on the remainder of dividing a cell ID in 6 shifts the frequency direction.
[0175]
　Resource elements indicated by C1 ~ C4 are indicating channel state information reference signal antenna ports 15 ~ 22 (CSI-RS). Resource elements indicated by C1 ~ C4 show the CSI-RS CDM groups 1 ~ CDM group 4, respectively. CSI-RS is composed of an orthogonal sequence using Walsh code (orthogonal code), and scrambling code using the pseudo random sequence. Furthermore, CSI-RS, within CDM group, are code division multiplexed by orthogonal codes for each Walsh code, and the like. Furthermore, CSI-RS is between CDM groups are frequency division multiplexed (FDM) with each other.
[0176]
　CSI-RS for antenna ports 15 and 16 are mapped to C1. CSI-RS for antenna ports 17 and 18 are mapped to C2. CSI-RS for antenna ports 19 and 20 are mapped to C3. CSI-RS for antenna ports 21 and 22 are mapped to C4.
[0177]
　Number of antenna ports of CSI-RS is more defined. CSI-RS can be set as a reference signal corresponding to the eight antenna ports of the antenna ports 15-22. Furthermore, CSI-RS can be set as a reference signal corresponding to the four antenna ports of the antenna ports 15-18. Furthermore, CSI-RS can be set as a reference signal corresponding to two antenna ports of antenna ports 15-16. Furthermore, CSI-RS can be set as a reference signal corresponding to a single antenna port of the antenna ports 15. CSI-RS can be mapped onto some subframes, for example, it may be mapped to each of a plurality of subframes. Mapping pattern for resource elements of CSI-RS is more defined. Further, the base station apparatus 1 to the terminal device 2, it is possible to set a plurality of CSI-RS.
[0178]
　CSI-RS can transmit power to zero. Transmission power CSI-RS of zero is referred to as zero-power CSI-RS. Zero power CSI-RS is set independently of the CSI-RS for antenna ports 15-22. Incidentally, CSI-RS for antenna ports 15-22 are referred to as non-zero power CSI-RS.
[0179]
　The base station apparatus 1, through RRC signaling, as specific control information to the terminal device 2, sets the CSI-RS. The terminal device 2 through the RRC signaling by the base station apparatus 1, CSI-RS is set. Further, the terminal device 2, CSI-IM resource is a resource for measuring interference power can be set. Terminal device 2, based on the setting from the base station apparatus 1, CRS, using CSI-RS and / or CSI-IM resource, generates the feedback information.
[0180]
　Resource elements indicated by D1 ~ D2 shows the DL-DMRS CDM groups 1 ~ CDM group 2, respectively. DL-DMRS is constructed using an orthogonal sequence (orthogonal code) using Walsh codes, and a scrambling sequence according to a pseudo random sequence. Also, DL-DMRS is independent for each antenna port, can be multiplexed within each resource block pair. DL-DMRS is by CDM and / or FDM, they are orthogonal to each other among the antenna ports. DL-DMRS, within CDM group are CDM by the orthogonal codes. DL-DMRS is between CDM groups, the FDM each other. DL-DMRS in the same CDM group are respectively mapped to the same resource element. DL-DMRS in the same CDM group are different orthogonal sequences used respectively between antenna ports, their orthogonal sequences are mutually orthogonal. DL-DMRS for PDSCH may use some or all of the eight antenna ports (antenna ports 7-14). That, PDSCH associated with the DL-DMRS can MIMO transmission of up to eight ranks. DL-DMRS for EPDCCH may use some or all of the four antenna ports (antenna ports 107-110). Also, DL-DMRS in accordance with the number of ranks of the associated channel, it is possible to change the number of CDM spreading code length and mapped the resource elements.
[0181]
　DL-DMRS for PDSCH to be transmitted at the antenna port 7, 8, 11 and 13 are mapped to resource elements indicated by D1. DL-DMRS for PDSCH to be transmitted at the antenna port 9, 10, 12 and 14 are mapped to resource elements indicated by D2. Also, DL-DMRS for EPDCCH to be transmitted by the antenna port 107 and 108 are mapped to resource elements indicated by D1. DL-DMRS for EPDCCH to be transmitted by the antenna port 109 and 110 are mapped to resource elements indicated by D2.
[0182]
　　
　Hereinafter, the NR, describes an example of downlink resource elements mapped in a given resource.
　Here, the predetermined resource, the resource blocks in NR, NR-RB (NR resource blocks) also may be referred. The given resource, NR-PDSCH or NR-PDCCH given channel or unit of allocation for a given signal, the unit to define mappings for the resource elements of a given channel or a predetermined signal, such as, and / or parameters set may be defined based like unit set.
[0183]
　Figure 11 is a diagram showing an example of a downlink resource elements mapping NR in this embodiment. 11, when the parameter set 0 is used, shows a set of resource elements in a given resource. Given resource shown in FIG. 11 is a resource of the same time length and bandwidth as a single resource block pair in LTE.
[0184]
　In the example of FIG. 11, the predetermined resource, 14 OFDM symbols represented by OFDM symbol numbers 0 to 13 in the time direction, and, consists of 12 subcarriers indicated by subcarrier numbers 0 to 11 in the frequency direction It is. If the system bandwidth is comprised of a plurality of predetermined resources, the sub-carrier number is assigned across the system bandwidth.
　Resource elements indicated by C1 ~ C4 are indicating channel state information reference signal antenna ports 15 ~ 22 (CSI-RS) . Resource elements indicated by D1 ~ D2 shows the DL-DMRS CDM groups 1 ~ CDM group 2, respectively.
[0185]
　Figure 12 is a diagram showing an example of a downlink resource elements mapping NR in this embodiment. 12, when the parameter set 1 is used, shows a set of resource elements in a given resource. Given resource shown in FIG. 12 is a resource of the same time length and bandwidth as a single resource block pair in LTE.
[0186]
　In the example of FIG. 12, the predetermined resource, seven OFDM symbols represented by the OFDM symbol numbers 0-6 in the time direction, and, consists of 24 subcarriers indicated by subcarrier numbers 0-23 in the frequency direction It is. If the system bandwidth is comprised of a plurality of predetermined resources, the sub-carrier number is assigned across the system bandwidth.
　Resource elements indicated by C1 ~ C4 are indicating channel state information reference signal antenna ports 15 ~ 22 (CSI-RS) . Resource elements indicated by D1 ~ D2 shows the DL-DMRS CDM groups 1 ~ CDM group 2, respectively.
[0187]
　Figure 13 is a diagram showing an example of a downlink resource elements mapping NR in this embodiment. 13, when the parameter set 1 is used, shows a set of resource elements in a given resource. Given resource shown in FIG. 13 is a resource of the same time length and bandwidth as a single resource block pair in LTE.
[0188]
　In the example of FIG. 13, the predetermined resource, 28 OFDM symbols represented by OFDM symbol numbers 0 to 27 in the time direction, and the structure of six subcarriers indicated by subcarrier numbers 0-6 in the frequency direction It is. If the system bandwidth is comprised of a plurality of predetermined resources, the sub-carrier number is assigned across the system bandwidth.
　Resource elements indicated by C1 ~ C4 are indicating channel state information reference signal antenna ports 15 ~ 22 (CSI-RS) . Resource elements indicated by D1 ~ D2 shows the DL-DMRS CDM groups 1 ~ CDM group 2, respectively.
[0189]
　For example, the NR, the reference signal corresponding to the CRS in LTE may be not transmitted.
[0190]
　　
　As previously described, multiple in the present embodiment, the NR, parameters different physical signal related to the transmission signal as shown in FIGS. 11 to 13, such as by FDM It can be. For example, the multiplexing is carried out a predetermined resource units. Further, the multiplex, even if the base station apparatus 1 performs such scheduling to recognize, the terminal device 2 may not be recognized. Terminal device 2 may be only a recognition physical signal terminal device 2 receives or transmits and be unaware of the physical signal terminal device 2 does not receive or transmit.
[0191]
　The parameter relating to the transmission signal is defined in a mapping to resource elements may be set or defined. In NR, resource elements mapping can be performed using a variety of methods. In the present embodiment, a method of resource element mapping of NR is described downlink, also applicable to uplink and side links.
[0192]
　First mapping method for resource element mapping in NR is a method to set or define the parameters (physical parameters) relating to the transmitted signal for a given resource.
[0193]
　In the first mapping method, the predetermined resource, the parameters are set regarding the transmission signal. The parameter relating to the transmission signal set for a given resource, subframe interval of subcarriers in a given resource, the number of subcarriers included in a predetermined resource, the number of symbols included in the predetermined resource, CP at a given resource multiple access scheme used long type, in a given resource, and / or a parameter set for a given resource.
[0194]
　For example, in the first mapping method, the resource grid in NR may be defined by the given resource.
[0195]
　Figure 14 is a diagram showing an example of a resource element mapping method of NR in the present embodiment. In the example of FIG. 14, in a given system bandwidth and a predetermined time domain (sub-frame), one or more predetermined resources can be FDM.
[0196]
　Time length of the bandwidth and / or given resource at a given resource may be defined in advance. For example, the bandwidth at a given resource corresponds to 180 kHz, the time length in a given resource corresponds to 1 millisecond. That is, the predetermined resource, correspond to the same bandwidth and time length and resource block pair in LTE.
[0197]
　The time length of the band width and / or given resource at a given resource may be set by RRC signaling. For example, the time length of the bandwidth and / or given resource at a given resource is set to the base station apparatus 1 (cell) specific based on the information contained in the MIB or SIB is transmitted through such a broadcast channel. Further, for example, the time length of the bandwidth and / or given resource at a given resource is set to the terminal device 2-specific based on the specific control information to the terminal device 2.
[0198]
　In the first mapping method, the parameters relating to the transmission signal set for a given resource may be set by RRC signaling. For example, the parameter is set to the base station apparatus 1 (cell) specific based on the information contained in the MIB or SIB is transmitted through such a broadcast channel. Further, for example, the parameter is set to the terminal device 2-specific based on the specific control information to the terminal device 2.
[0199]
　In the first mapping method, setting of the parameters relating to transmission signal set for a given resource is performed based on at least one of the following methods or definitions.
[0200]
　　(1) Parameters related to the transmission signal is set individually for each of the given resource.
[0201]
　　(2) parameters related to the transmission signal is set individually for each group of a predetermined resource. Group of a given resource is a set of given resource continuous in the frequency direction. The number of predetermined resources included in the group, may be defined in advance or may be set through RRC signaling.
[0202]
　　(3) a predetermined resource parameters are set in a predetermined resource to be started, and / or determined based on information indicating the predetermined resource to be ended, a predetermined resource consecutive. The information may be set such as through RRC signaling.
[0203]
　　(4) a predetermined resource parameters are set in is indicated by the information of the bitmap. For example, each of the bits included in the information of the bitmap corresponds to a given resource or group of given resource. If a bit contained in the information of the bit map is 1, given resource or group of predetermined resources corresponding to that bit, the parameters are set. Information of the bit map may be set such as through RRC signaling.
[0204]
　　(5) a predetermined resource predetermined signal or a predetermined channel is mapped (transmission), the parameter is used as defined previously. For example, predetermined resources synchronizing signal or the broadcast channel is transmitted, the parameter is used as defined previously. For example, the parameter may correspond to the same bandwidth and time length and resource block pairs in LTE, which is defined in advance.
[0205]
　　(6) Parameter predetermined signal or a predetermined channel mapping predetermined time region including the predetermined resources (transmission) (i.e., all of a given resource of a predetermined time included in the region) is defined in advance It is used. For example, the sub-frame including a given resource synchronization signal or the broadcast channel is transmitted, the parameter is used as defined previously. For example, the parameter may correspond to the same bandwidth and time length and resource block pairs in LTE, which is defined in advance.
[0206]
　　(7) parameters are given not set resource parameters are used as defined previously. For example, in certain resource parameter is not set, the same parameters as given resource synchronization signal or the broadcast channel is transmitted is used.
[0207]
　　(8) In a cell (component carrier), the parameters that can be set is limited. For example, in one cell, the subcarrier interval may be set to a value bandwidth in a given resource is an integral multiple of the subcarrier spacing. Specifically, if the bandwidth of the given resource is 180 kHz, the subcarrier interval may be set, including 3.75kHz, 7.5kHz, 15kHz, 30kHz, and 60 kHz.
[0208]
　Second mapping method for resource element mapping in NR is a method based on the sub resource element used to define a resource element.
[0209]
　In the second mapping method, the sub-resource element defines a resource element corresponding to the parameter related to the transmission signal is used to set or define. In the second mapping method, resource elements and sub-resource elements are referred to as first and second elements, respectively.
[0210]
　In other words, in the second mapping method, the parameters related to the transmission signal (physical parameters) based on the setting relating to the sub resource element is set.
[0211]
　For example, in a given resource, the number or pattern of the sub-resource element constituting one resource element is set. Further, given resource may be the same as the predetermined resource of the embodiments described below.
[0212]
　For example, in the second mapping method, the resource grid in NR may be defined by a predetermined number of sub-resource elements.
[0213]
　Figure 15 is a diagram showing an example of a resource element mapping method of NR in the present embodiment. In the example of FIG. 15, each of the predetermined resource, and a time and 28 sub-resource element in the direction, and 24 sub-resource element in the frequency direction. That is, when the frequency bandwidth at a given resource is 180 kHz, the frequency bandwidth in the sub-resource element becomes 7.5 kHz.
[0214]
　Time length of bandwidth and / or sub-resource elements in the sub-resource element may be defined in advance. Further, for example, sub-resource element corresponds to a same bandwidth (15 kHz) and the time length and sub resource element in LTE.
[0215]
　The time length of the band width and / or sub-resource elements in the sub-resource element may be set by RRC signaling. For example, the time length of the bandwidth and / or sub-resource elements in the sub-resource element is set in the base station apparatus 1 (cell) specific based on the information contained in the MIB or SIB is transmitted through such a broadcast channel. Further, for example, the time length of the bandwidth and / or sub-resource elements in the sub-resource element is set to the terminal 2-specific based on the specific control information to the terminal device 2. Also, if the time length in bandwidth and / or sub-resource elements in the sub-resource element is not set, the sub-resource element may correspond to the same bandwidth (15 kHz) and the time length and sub resource element in LTE .
[0216]
　In the second mapping method, settings for sub-resource elements constituting one resource element is performed based on at least one of the following methods or definitions.
[0217]
　　(1) the setting is performed individually for each of the given resource.
[0218]
　　(2) the setting is performed separately for each group of a predetermined resource. Group of a given resource is a set of given resource continuous in the frequency direction. The number of predetermined resources included in the group, may be defined in advance or may be set through RRC signaling.
[0219]
　　(3) given resource whose setting is performed, the predetermined resource to be started, and / or determined based on information indicating the predetermined resource to be ended, a predetermined resource consecutive. The information may be set such as through RRC signaling.
[0220]
　　(4) given resource whose setting is made is indicated by the information of the bitmap. For example, each of the bits included in the information of the bitmap corresponds to a given resource or group of given resource. If a bit contained in the information of the bit map is 1, given resource or group of predetermined resources corresponding to that bit, the setting is performed. Information of the bit map may be set such as through RRC signaling.
[0221]
　　(5) In certain resources predetermined signal or a predetermined channel is mapped (transmission) sub-resource elements constituting one resource element is defined in advance. For example, in certain resources synchronizing signal or the broadcast channel is transmitted, the sub-resource elements constituting one resource element is defined in advance. For example, pre-sub-resource elements defined corresponds to the same bandwidth and time length and resource elements in LTE.
[0222]
　　In (6) a predetermined signal or a predetermined channel mapping (transmitted) by the predetermined given time including the resource area (i.e., all of a given resource included in the predetermined time domain), one resource element sub-resource elements constituting is defined in advance. For example, the predetermined time region including the predetermined resources synchronizing signal or the broadcast channel is transmitted, the sub-resource elements constituting one resource element is defined in advance. For example, pre-sub-resource elements defined corresponds to the same bandwidth and time length and resource elements in LTE.
[0223]
　　(7) In the setting of predetermined not performed resource sub-resource elements constituting one resource element is defined in advance. For example, in certain resources that setting is not performed, the sub-resource element constituting one resource element is identical to the sub-resource element used in the predetermined resources synchronizing signal or the broadcast channel is transmitted.
[0224]
　　(8) the setting is the number of sub-resource elements constituting one resource element. The number of frequency direction and / or time direction in the sub resource element constituting one resource element. For example, sub-resource element, consider a set as shown in FIG. 15. In given resource, one if the resource element is composed of two sub-resource elements in the two sub-resource element and the time direction in the frequency direction, the predetermined resource of 12 subcarriers and 14 symbols in constructed. This configuration (setting) is the same as the number of subcarriers and symbols configured resource block pair in LTE, it is preferable to use case EMBB. Further, at a given resource, one case composed of sub-resource element, the pieces 6 subcarriers and 28 the predetermined resource in the four sub-resource element and the temporal direction single resource elements in the frequency direction composed of symbols. This configuration (setting) is suitable for use case URLLC. Further, at a given resource, the four cases consisting of sub-resource element, 24 subcarriers and 7 thereof given resource in one sub-resource element and the temporal direction single resource elements in the frequency direction composed of symbols. This configuration (setting) is suitable for use case MMTC.
[0225]
　　(9) the number of sub-resource elements constituting one resource element described in (8) is pre-patterned, information indicating the pattern (index) is used in its setting. The pattern, CP length type, the definition of sub-resource element, multiple access scheme, and / or may include a parameter set.
[0226]
　　(10) in one cell (component carrier) or a single time domain (sub-frame), the number of sub-resource elements constituting one resource element is constant. For example, in one cell or one time domain, the as in the example described in (8), the number of sub-resource elements constituting a single resource element are all 4. That is, in the example, the bandwidth and time length of resource elements the number of sub-resource element can be a 4 to constitute one resource element can be constructed.
[0227]
　In the description of this embodiment, the NR, the predetermined resource, downlink has been described to be used for the resource element mapping in the uplink or side links. However, the invention is not limited thereto. The given resource, downlink, of uplink and side links, may be used for resource element mapping in two or more links.
[0228]
　For example, given resource is used for the resource element mapping in the downlink and uplink. In one given resource, a predetermined number of symbols of the front is used for the resource element mapping in the downlink. In the predetermined resource, a predetermined number of symbols of the rear is used for the resource element mapping in the uplink. In the predetermined resource, a predetermined number of symbols between the front of the predetermined number of symbols and the rear of a predetermined number of symbols may be used for the guard period. In the predetermined resource, in front of a predetermined number of symbols of the symbol and the rear of a predetermined number may be used the same physical parameters respectively, may be physical parameters is used to be set independently.
[0229]
　In the description of this embodiment, the NR, downlink, has been described as a link to the uplink and side links are defined independently, without being limited thereto. Downlink, uplink and side links may be defined as a common link. For example, the channel described in the present embodiment, the signal, such as processing and / or resources, downlink, irrespective of uplink and side links are defined. The base station apparatus 1 or the terminal apparatus 2 is set to be defined in advance, based on the control information in the set and / or physical layer by RRC signaling, channel, signal, such as processing and / or resources is determined. For example, the terminal device 2, based on the setting from the base station apparatus 1, the channel and the signal is determined can be transmitted and received.
[0230]
　　
　In NR, a physical channel and / or physical signal self-contained transmission (self-contained,
can be transmitted by Transmission). Figure 16 shows an example of a frame structure of a self-contained transmission in the present embodiment. The self-contained transmission, one transmission and reception, the downlink successive transmissions from the head, and a GP (Guard Period), and consecutive downlink transmission order. The successive downlink transmission includes at least one downlink control information and DMRS. As downlink control information instructing transmission of the uplink physical channel included in the uplink transmission to reception, or continuous downlink physical channels included in a downlink transmission to the continuous. If the downlink control information instructs the receiving of the downlink physical channel, the terminal device 2 attempts to receive the downlink physical channel based on the downlink control information. Then, the terminal apparatus 2, the reception success or failure of the downlink physical channel (decoding success or failure), and transmits the uplink control channel included in the uplink transmission to be allocated after GP. On the other hand, if the downlink control information instructs the transmission of the uplink physical channels, for transmission, including the uplink physical channel transmitted based on the downlink control information on uplink transmission. Thus, the downlink control information, by switching flexibly transmit the transmission and downlink data uplink data, it is possible to respond immediately to changes in the traffic ratio of uplink and downlink. Further, by notifying in uplink transmission immediately after the reception success or failure of the downlink, it is possible to realize low delay communication of the downlink.
[0231]
　Unit slot time, downlink transmission, GP, is the smallest time unit to define the uplink transmission or side link transmission. Unit slot time, downlink transmission, GP, is reserved for either the uplink transmission, or side link transmission. Some unit slot time, does not include both the predetermined downlink transmission and the predetermined uplink transmission. For example, a unit slot time includes a transmission downlink in, does not contain simultaneously the uplink transmission for the HARQ-ACK for the downlink transmission. Unit slot time may be the minimum transmission time of the channel associated with the DMRS included in the unit slot time. One unit slot time is, for example, the sampling interval (T a NR s is defined as an integer multiple of) or symbol length.
[0232]
　A unit frame time may be a minimum time specified by the scheduling. A unit frame time may be a minimum unit which a transport block is transmitted. Unit slot time may have a maximum transmission time of the channel associated with the DMRS included in the unit slot time. A unit frame time may be a unit time for determining the uplink transmission power in the terminal device 2. A unit frame period, may be referred to as a subframe. Units frame time, downlink transmission only, uplink transmission only, three types of combinations of uplink transmission and downlink transmission are present. One unit frame time, for example, the sampling interval of the NR (T s ), is defined as an integer multiple of the symbol length or unit slot time.
[0233]
　Reception time is the one reception time. One transceiver and another between the transmission and reception, which physical channels and physical signals also occupied by the time not transmitted (the gap). The terminal apparatus 2, do not mean the CSI measurements between different transceiver. Receiving time may also be referred to as TTI. One transceiver time, for example, the sampling interval of the NR (T s ), symbol length, the unit slot time, or defined by an integral multiple of a unit frame time.
[0234]
　Further, as in shown in FIG. 16 (b) and (c), the uplink transmission to downlink transmission and continuous continuous, by one control channel, collectively may be scheduled, in each unit frame time in the transmission is the control channel may be scheduled separately. In any case, the control channel, the time length of the downlink transmission may include the time length of the uplink transmission, and / or the time length of GP. The control channel may include information about the timing of the uplink transmission for the HARQ-ACK for a downlink transmission.
[0235]
　　
　In the present embodiment, the size of a plurality of TTI (TTI length) is defined. For example, the mode relating to the size of the TTI (TTI mode) is more defined, the base station apparatus sets the mode through the control information to the terminal device. The base station apparatus performs data transmission based on TTI mode set in the terminal device. Terminal apparatus performs data transmission based on TTI mode set by the base station apparatus. Configuring TTI mode can be performed individually for each cell (serving cell).
[0236]
　A plurality of TTI are respectively defined separately for LTE and NR.
[0237]
　First TTI mode is a mode based on the first TTI length, the second TTI mode is a mode based on a second TTI length. For example, the first TTI length is the length of the subframe in LTE, or TTI length in the parameter set 0 of NR is used. The second TTI length is a time length corresponding to a predetermined number of symbols less than the length of the subframe in LTE, or TTI length in the parameter set 1 NR is used. Further, for example, TTI in the first TTI mode is an integer multiple of the sub-frame length, TTI in the second TTI mode is an integer multiple of the symbol length. Further, for example, TTI in the first TTI mode is defined by one sub-frame used in the conventional systems, TTI in the second TTI mode defined by an integral multiple of the symbol length not used in conventional systems or it is set. Incidentally, TTI is defined or set in the first TTI mode is also referred to as a first TTI, TTI defined or set in the second TTI mode is referred to as a second TTI.
[0238]
　Configuring TTI mode can be formed using a variety of methods. In one example of TTI mode setting, the terminal first TTI mode or a second TTI mode is set by the control information. If the first TTI mode is set, data transmission is performed based on the first TTI. If the second TTI mode is set, data transmission is performed based on the second TTI. In another example of the TTI mode setting, the terminal device second TTI mode by control information (extended TTI mode, STTI (Short TTI) mode) it is set. If the second TTI mode is not set, the data transmission is performed based on the first TTI. If the second TTI mode is set, data transmission is performed based on the second TTI. The second TTI is referred to as extended TTI or STTI, (Short TTI).
[0239]
　Settings for STTI (STTI setting) is set through signaling of an RRC signaling and / or physical layers. STTI settings, information about the TTI size (parameter) settings relating STTI in a downlink (downlink STTI setting), setting related STTI in the uplink (uplink STTI setting), and / or control for notifying control information about STTI including the information for monitoring the channel. STTI settings can be set individually for each cell (serving cell).
[0240]
　Setting related STTI in the downlink is set for transmission (sending and receiving) of a downlink channel in STTI mode (PDSCH, PDCCH and / or EPDCCH), including settings related to downlink channel in STTI mode. For example, settings for STTI in the downlink, setting related PDSCH in STTI mode, setting for PDCCH in STTI mode, and / or a setting for EPDCCH in STTI mode.
[0241]
　Setting related STTI in the uplink is a setting for transmission of the uplink channel (PUSCH and / or PUCCH) (transceiver) in STTI mode, including setting relating to uplink channel in STTI mode. For example, settings for STTI in the uplink, settings for PUSCH in STTI mode, and / or a setting for PUCCH in STTI mode.
[0242]
　Information for monitoring a control channel carrying control information regarding STTI is RNTI for scrambling the CRC added to the control information about STTI (DCI). The RNTI is also referred to as STTI-RNTI. Further, STTI-RNTI may be set in common to STTI in STTI and uplink in the downlink may be set independently. Also, if the STTI setting is more set, STTI-RNTI may be set in common to all STTI setting it may be set independently.
[0243]
　Information about the TTI size is information indicating the size of the TTI at STTI mode (i.e., the size of STTI). For example, information about the TTI size, including the number of OFDM symbols to set the TTI in which the OFDM symbol as a unit. Also, if the information about the TTI size is not included in STTI setting, TTI size can be predefined values. For example, if the information about the TTI size is not included in STTI setting, TTI size, a 1-symbol length or one sub-frame length. Further, information on TTI size, may be set in common to STTI in STTI and uplink in the downlink may be set independently. Also, if the STTI setting is more set, information about the TTI size, may be set in common to all STTI setting may be set independently.
[0244]
　In the description of this embodiment, the channel in STTI mode (STTI channel) includes an uplink channel in a downlink channel and / or STTI mode in STTI mode. Setting about the channel in STTI mode (STTI channel setting) includes a setting relating to uplink channel in setting and / or STTI modes for downlink channel in STTI mode. PDCCH in STTI mode, SPDCCH (Shortened PDCCH), FEPDCCH (Further Enhanced PDCCH), or RPDSCH (Reduced PDCCH) also is referred. PDSCH in STTI mode, SPDSCH (Shortened PDSCH), EPDSCH (Enhanced PDSCH), or RPDSCH (Reduced PDSCH) also is referred. PUSCH in STTI mode, SPUSCH (Shortened PUSCH), also referred to as EPUSCH (Enhanced PUSCH), or RPUSCH (Reduced PUSCH). PUCCH in STTI mode, SPUCCH (Shortened PUCCH), also referred to as EPUCCH (Enhanced PUCCH), or RPUCCH (Reduced PUCCH). STTI channel includes SPDCCH, SPDSCH, SPUSCH, or SPUCCH. STTI channel settings, SPDCCH set (second PDCCH setting), SPDSCH set (second PDSCH set), including SPUSCH set (second PUSCH setting), or SPUCCH set (second PUCCH configuration).
[0245]
　In the present embodiment, data transmission and scheduling method for channel in STTI mode, it is possible to use a variety of methods or schemes. For example, channels in STTI mode is mapped to a part or all of one or more periodic resources set or notified through signaling of the signaling and / or physical layer of the upper layer.
[0246]
　In the present embodiment, the physical downlink control channel in the first TTI mode is also called PDCCH or the first PDCCH, Physical Downlink Control Channel in the second TTI mode is also called SPDCCH or second PDCCH.
[0247]
　In the present embodiment, the physical downlink shared channel in the first TTI mode is also called PDSCH or first PDSCH physical downlink shared channel in the second TTI mode is also called SPDSCH or second PDSCH.
[0248]
　In the present embodiment, the physical uplink control channel in the first TTI mode is also called PUCCH or the first PUCCH, Physical Uplink Control Channel in the second TTI mode is also called SPUCCH or second PUCCH.
[0249]
　In the present embodiment, the physical uplink shared channel in the first TTI mode is also called PUSCH or first PUSCH, a physical uplink shared channel in the second TTI mode is also called SPUSCH or second PUSCH.
[0250]
　Channel in STTI mode is mapped on the basis of the sub-resource blocks. Sub resource blocks are used to represent the mapping of the predetermined channel in STTI mode for resource elements. One sub-resource block is defined by a consecutive subcarriers corresponding to one TTI in the time domain, and consecutive subcarriers corresponding to one resource block in the frequency domain. Certain sub resource block may be configured to include only one resource block may be arranged over two resource blocks. Furthermore, certain sub-resource blocks may be arranged across the two resource blocks in one resource block pair, but may not be configured over a plurality of resource block pair.
[0251]
　Channel in STTI mode is transmitted and received based on the extended sub-frame. Extended sub-frame is defined or set by the TTI length in STTI mode. For example, when the TTI length is 2 symbols, the extended sub-frame is defined or set by two symbols. Extended subframe length is the time length of the sub-resource blocks. Extended sub-frame is defined or set a smaller number of symbols than the number of symbols corresponding to the sub-frame. Extended sub-frame, sub-sub-frame, also referred to as short sub-frame.
[0252]
　Each channel in STTI mode of transport block (codeword) is transmitted using one or more sub-resource blocks in the same TTI.
[0253]
　　
　terminal device, through signaling of the signaling and / or physical layer of the upper layer, resource channels in STTI mode (STTI channel) can be mapped (sub resource blocks) is set. Resource channel may be mapped in STTI mode is referred to as STTI channel candidates. The series of STTI channel candidates set by one STTI channel configuration is referred to as the set of STTI channel candidates.
[0254]
　In NR, STTI channel setting may be a setting related parameter set 2.
[0255]
　Set of STTI channel candidates, the TTI of a predetermined period in the time domain is specified by a given sub-resource blocks in the frequency domain. In the same STTI channel can STTI channel setting multiple sets. That is, each set of STTI channel candidates, can be independently set resources in period and / or frequency domain in the time domain. If multiple STTI channel setting is set, the terminal may monitor the plurality of sets of STTI channel candidates that has been set.
[0256]
　STTI channel configuration includes STTI channel setting information in the time domain, STTI channel setting information in the frequency domain, and / or the information about the HARQ-ACK for STTI channel. Incidentally, STTI channel configuration, information about the TTI size, and / or may further include information for monitoring a control channel carrying control information regarding STTI channel. STTI channel setting information in the time domain is information for determining resources STTI channel candidates in the time domain. STTI channel setting information in the frequency domain is information for determining resources STTI channel candidates in the frequency domain.
[0257]
　Information for determining resources STTI channel candidates can be used various forms (format). Resources STTI channel in the frequency domain, determining a resource block or sub-resource block units (set, defined, designated) is.
[0258]
　An example of STTI channel setting information in the time domain, including the offset period and a predetermined number of TTI of a predetermined number of TTI. Offset of TTI is an offset (shift) from TTI to be a reference, it is set to TTI units. For example, if the offset of the TTI is three, sets of STTI channel candidates, the 3TTI from TTI as a reference is set include a TTI offset. For example, if the period of the TTI is 3, the set of STTI channel candidates, is set at a period of 2TTI intervals. If the period of the TTI is 1, all TTI continuous is set.
[0259]
　Another example of STTI channel setting information in the time domain, using the bitmap information indicating the TTI of STTI channel candidates. For example, one bit in the bitmap information corresponds to a respective TTI in a predetermined number of subframes or a predetermined number of radio frames. In the bitmap information, if a bit is 1, TTI corresponding to the bit indicates that the TTI containing STTI channel candidates. In the bitmap information, if a bit is 0, indicating that the TTI is not a TTI including STTI channel candidates corresponding to the bit. Specifically, if the TTI size is 1 subframe, the number of TTI in five sub-frame is 70. In that case, the bitmap information is the 70-bit information. The bitmap information is applied from the TTI as a reference, it is applied repeatedly every TTI corresponding to the bitmap information.
[0260]
　An example of STTI channel setting information in the frequency domain, using the bitmap information indicating the set of sub-resource blocks or sub-resource blocks STTI channel candidates. For example, one bit in the bitmap information corresponds to a respective set of a predetermined number of sub-resource blocks. In the bitmap information indicates that there if the bit is 1, the sub-resource blocks in the set of sub-resource blocks corresponding to the bit is a sub-resource blocks including STTI channel candidates. In the bitmap information, if a bit is 0, indicating that it is not a sub-resource block sub-resource blocks in the set of sub-resource blocks corresponding to the bits containing STTI channel candidates.
[0261]
　Another example of STTI channel setting information in the frequency domain, using a sub resource block to be started, and the number of sub-resource blocks to be allocated contiguously.
[0262]
　A set of sub-resource block is composed of a predetermined number of sub-resource blocks consecutive in the frequency domain. A predetermined number of sub-resource blocks constituting the set of sub-resource blocks may be determined based on other parameters, such as the system bandwidth may be set through RRC signaling. In the description of this embodiment, the set of sub-resource blocks includes simply sub-resource blocks.
[0263]
　Subresource blocks set by STTI channel setting information in the frequency domain may be the same for all TTI, by switching for each TTI in a predetermined number (hopping) may be. For example, the sub-resource blocks STTI channel candidates in a certain TTI is a number indicating the TTI (index information) further by being determined using a sub-resource blocks STTI channel candidates is set differently for each TTI . This frequency diversity effect can be expected.
[0264]
　Information about the HARQ-ACK for STTI channel includes information about the resources to report HARQ-ACK for STTI channel. For example, if STTI channel is SPDSCH, information on HARQ-ACK for STTI channel, explicitly or implicitly indicating the resource in an uplink channel to report HARQ-ACK for SPDSCH.
[0265]
　If the same multiple STTI channel settings for STTI channels is set, it may be all the parameters are set independently in STTI channel setting may be some parameters are commonly set. For example, a plurality of STTI channel setting, STTI channel setting information in STTI channel configuration information and the frequency domain in the time domain is set independently. For example, a plurality of STTI channel setting, STTI channel setting information in the time domain are commonly set, STTI channel setting information in the frequency domain is set independently. For example, a plurality of STTI channel settings are set to independently STTI channel setting information in the time domain, STTI channel setting information in the frequency domain is commonly set. The information that is set in common may be only partially, or may be commonly set the period of TTI included in STTI channel setting information in the time domain.
[0266]
　Some of the information or parameters set by STTI set in this embodiment, may be reported through the signaling of the physical layer. For example, STTI channel setting information in the frequency domain, is notified through the signaling of the physical layer.
[0267]
　In one example of operation in the terminal device STTI mode, the terminal device operates only with the control information notified by the higher layer signaling (RRC signaling). Terminal device, when STTI channel setting is set by the control information notified by the higher layer signaling, and starts monitoring or reception of corresponding STTI channel. Terminal device, when it is released by the control information is STTI channel setting set is notified by the higher layer signaling, and stops the monitoring or reception of corresponding STTI channel. In this example, works only with the control information notified by the higher layer signaling, the signaling of the physical layer for it does not signal, can be realized STTI mode without increasing the overhead in the signaling of the physical layer.
[0268]
　In another example of operation in the terminal device STTI mode, the terminal device operates the control information notified by the signaling control information and the physical layer is notified by the higher layer signaling (RRC signaling). Terminal device, when STTI channel setting is set by the control information notified by the higher layer signaling, the scheduling of the corresponding STTI channel enable information to (activation) (DCI) is notified through the signaling of the physical layer , starts the monitoring or reception of corresponding STTI channel. Terminal is set by the control information STTI channel setting is notified by the higher layer signaling, if the information to release the scheduling of the corresponding STTI channel (DCI) is notified through the signaling of the physical layer, corresponding STTI channel to stop the monitoring or receiving. In this example, for notifying the signaling of the physical layer part of the control information for operating the STTI mode, it can be used dynamically switching operations relating STTI mode.
[0269]
　If multiple STTI channel setting is set, the information to the information or release to enable scheduling of STTI channel may notify in common for each STTI channel may notify independently.
[0270]
　Multiple STTI channel setting is set, if the STTI channel candidate set differently collide in the same TTI (i.e., when a plurality of STTI channel candidates within the same TTI is set), the terminal device all it may be monitoring the STTI channel candidate, may also be monitoring the part of the STTI channel candidates. When monitoring a portion of STTI channel candidates, the terminal device, based on a predetermined priority, it may determine the monitoring to STTI channel candidates. For example, a given priority, the type of STTI channel is determined based on factors (parameters) including the ability of the index (number) and / or the terminal apparatus according to the STTI channel setting.
[0271]
　　
　In the present embodiment, SPDSCH and / or SPUSCH is scheduled based on the DCI to be transmitted on the PDCCH and / or SPDCCH.
[0272]
　An example of SPDSCH and / or SPUSCH scheduling method, SPDSCH and / or SPUSCH includes a first DCI transmitted at predetermined PDCCH, scheduled by the second DCI transmitted at predetermined SPDCCH. For example, in the scheduling of certain SPDSCH and / or SPUSCH, first DCI is transmitted on the PDCCH in a first TTI containing the SPDSCH and / or SPUSCH, second DCI has its SPDSCH and / or SPUSCH It sent in SPDCCH in the second TTI, including.
[0273]
　Figure 17 is a diagram showing an example of scheduling in the first TTI and the second TTI. In the example of FIG. 17, the system bandwidth in the frequency direction, and it has been shown resources defined by the length of the first TTI in the time direction. For example, the length of the time direction in the resources indicated in Figure 17, the sub-frame length in the LTE, corresponding to such TTI length used in parameter set 0 in NR. In this figure shows the case where SPDSCH is scheduled as an example, also applicable to scheduling of SPUSCH.
[0274]
　In Figure 17, PDCCH-1 transmits the DCI for scheduling PDSCH. PDCCH-2 transmits a first DCI for scheduling SPDSCH in the second TTI included in the first TTI. SPDCCH-4 from SPDCCH-1 transmits the second DCI for scheduling SPDSCH-4 from each SPDSCH-1. That is, each from SPDSCH-1 SPDSCH-4, is scheduled in the first DCI transmitted on PDCCH-2, by the second DCI transmitted in from each SPDCCH-1 SPDCCH-4.
[0275]
　Further, SPDSCH can be scheduled only by DCI transmitted on SPDCCH. In this case, PDCCH-2, the information indicating whether the first SPDCCH and / or SPDSCH the TTI is transmitted, or may be transmitted contains information on the monitoring of SPDCCH in that the first TTI .
[0276]
　Here, the first DCI is generated based on the first DCI format (DCI format X1). Second DCI is generated based on the second DCI format (DCI format X2).
[0277]
　The first DCI and second DCI indicating the scheduling SPDSCH are respectively referred to as a second DCI for the first DCI and SPDSCH for SPDSCH. First DCI and second DCI indicating the scheduling SPUSCH are respectively referred to as a second DCI for the first DCI and SPUSCH for SPUSCH.
[0278]
　Figure 18 is a diagram showing an example of scheduling in the first TTI and the second TTI. Example of FIG. 18 is almost the same as the example of FIG. 17, the difference is that the PDCCH region PDCCH-1 and PDCCH-2 is mapped is set. Its PDCCH region, it is possible not contain PDSCH, it is SPDSCH and SPDCCH. In this figure shows the case where SPDSCH is scheduled as an example, also applicable to scheduling of SPUSCH.
[0279]
　In the first TTI, the terminal device 2, based on such setting from the base station apparatus 1, the monitoring of the control channel is determined.
[0280]
　Figure 19 is a diagram showing an example of a flow for monitoring the control channel in the present embodiment. In step S1, the terminal device 2 determines whether STTI channel setting has been set. In step S1, in the first TTI with, the terminal apparatus 2 may determine whether STTI channel setting is valid.
[0281]
　In step S2, if the STTI channel setting is not set, the terminal device 2 monitors the PDCCH-1 of a predetermined number in the first TTI. In step S2, if the terminal device 2 detects a PDCCH-1, and transmits the received and / or PUSCH of PDSCH based on the PDCCH-1.
[0282]
　On the other hand, in step S3, if the STTI channel setting is set, the terminal device 2 monitors the PDCCH-1 and PDCCH-2 of a predetermined number of predetermined number in the first TTI. In step S2, if the terminal device 2 detects a PDCCH-1, and transmits the received and / or PUSCH of PDSCH based on the PDCCH-1.
[0283]
　In step S4, the terminal device 2 determines whether it has detected the PDCCH-2. If the terminal device 2 does not detect the PDCCH-2, the terminal device 2 does not monitor the SPDCCH in each of the second TTI included in the first TTI. If the terminal device 2 detects a PDCCH-2, the terminal device 2 for monitoring a predetermined number of SPDCCH in each of the second TTI included in the first TTI. If the terminal device 2 detects the SPDCCH, the terminal device 2, based on the DCI transmitted on PDCCH-2 and SPDCCH, the transmission of the reception and / or SPUSCH of SPDSCH in a second TTI that SPDCCH is detected do.
[0284]
　Further, in step S4, if the PDCCH-2 is detected, the terminal apparatus 2 may be assumed to PDCCH-1 is not detected in the first TTI. Further, in step S4, if the PDCCH-1 is detected, the terminal apparatus 2 may be assumed to PDCCH-2 and / or SPDCCH is not detected in the first TTI.
[0285]
　　
　In the present embodiment, of the set and / or SPDCCH candidates PDCCH candidates that the terminal device 2 is monitoring may be determined based on the setting for the terminal device 2 . For example, the terminal device 2, based on whether or not STTI channel setting has been set, switches the set of the set and / or SPDCCH candidates PDCCH candidates for blind detection. In other words, it sets and / or SPDCCH set of candidate PDCCH candidates for blind detection is different depending on whether STTI channel setting has been set.
[0286]
　In the description of this embodiment, on the basis of whether STTI channel setting has been set, not be described that the process for the blind detection is switched to be limited thereto. For example, the switching of the processing, STTI channel setting is set, and may be based on whether the sub-frame is activation (whether valid).
[0287]
　If STTI channel setting is not set, the terminal device 2 monitors the first set of PDCCH candidates. In that case, the terminal device 2 does not monitor the set of SPDCCH candidate.
[0288]
　If STTI channel setting is set, the terminal device 2 monitors the second set of PDCCH candidates. In that case, the terminal device 2 further monitors a set of SPDCCH candidate. As already described, monitoring of the set of SPDCCH candidate may be determined based on whether it has detected the PDCCH including a second DCI.
[0289]
　The difference relates to the monitoring of the case and the control channel if STTI channel setting is set and STTI channel setting is not set, an item, or a combination thereof are shown below.
[0290]
　(A) relating to the number of the differences candidate. For example, the number of candidates in the second set of PDCCH candidates is less than the number of candidates in the first set of PDCCH candidates.
[0291]
　(B) related to the difference the search space. For example, if the STTI channel setting is not set, the terminal device 2 monitors the PDCCH candidates in CSS and USS. If STTI channel setting is set, the terminal device 2 monitors the PDCCH candidates in CSS, the SPDCCH candidates in USS. Further, for example, the number of candidates in CSS is the same in the second set of the first set and the PDCCH candidates PDCCH candidates, with regard USS, the number of candidates in the second set of PDCCH candidates, PDCCH less than the number of candidates in the first set of candidates.
[0292]
　(C) on the DCI format that difference is to be monitoring. For example, if the STTI channel setting is not set, the terminal device 2 monitors the PDCCH candidates in the DCI format 0 / 1A and DCI format 2. If STTI channel setting is set, the terminal device 2 monitors the PDCCH candidates in DCI format 0 / 1A and DCI format X1, the SPDCCH candidate DCI format X2. Further, the number of bits of the DCI format X1 may be the same as the number of bits of the DCI format 0 / 1A. In that case, it may be RNTI is scrambled differently.
[0293]
　(D) the difference is related to the aggregation level of monitoring. For example, aggregation level of PDCCH candidates in the case where STTI channel setting has been set is part of the aggregation level of the PDCCH candidates in the case where STTI channel setting is not set. Specifically, the aggregation level of the PDCCH candidates in the case where STTI channel setting is not set are 1, 2, 4 and 8, the aggregation level of the PDCCH candidates in the case where STTI channel setting has been set is 4 and 8.
[0294]
　(E) the difference is about RNTI. For example, if the STTI channel setting is set, the terminal device 2 given RNTI is set independently of the C-RNTI. That given RNTI is used to scramble the DCI format X1 and / or DCI format X2. Moreover, the DCI format X1 and DCI format X2, may be scrambled by the RNTI set independently. Further, DCI format X1 is scrambled with the predetermined RNTI, DCI format X2 may be scrambled by the C-RNTI.
[0295]
　　
　In the present embodiment, PDCCH and / or SPDCCH can be transmitted to the scheduling SPDSCH or SPUSCH. That is, the first DCI and / or the second DCI includes information about the scheduling of SPDSCH or SPUSCH.
[0296]
　As an example of the first DCI and / or the second DCI, first DCI and / or the second DCI is produced by the same DCI format in the scheduling of scheduling and SPUSCH of SPDSCH. That is, the first DCI and / or the second DCI is the same number of bits in the scheduling of scheduling and SPUSCH of SPDSCH. In that case, unlike the RNTI for scrambling the first DCI and / or the second DCI for scheduling SPDSCH, the RNTI for scrambling the first DCI and / or the second DCI for scheduling SPUSCH It is set Te. Further, RNTI but are identical, the first DCI and / or the second DCI may include information indicating whether scheduling scheduling or SPUSCH of SPDSCH.
[0297]
　As another example of the first DCI and / or the second DCI, first DCI and / or the second DCI is produced by different DCI format in the scheduling of scheduling and SPUSCH of SPDSCH. That is, the first DCI and / or the second DCI is the number of bits defined independently for the scheduling of scheduling and SPUSCH of SPDSCH. In that case, the first DCI and / or the number of candidates for the second DCI for scheduling SPDSCH (second TTI monitoring), the first DCI and / or the second for scheduling SPUSCH it may be different from the number of candidates (second TTI monitoring) for DCI.
[0298]
　　
　As described previously, each of SPDSCH and SPUSCH, can be scheduled by the first DCI and / or the second DCI.
[0299]
　An example of SPDSCH and / or SPUSCH scheduling, the first DCI includes information indicating SPDCCH, SPDSCH and / or SPUSCH resource (resource block, subframe, etc.), the second DCI is shown in the first DCI including information about SPDSCH and / or SPUSCH in resources.
[0300]
　As another example of SPDSCH and / or SPUSCH scheduling, RRC signaling SPDCCH, SPDSCH and / or SPUSCH resource (resource block, subframe, etc.) includes information indicating a first DCI relates SPDSCH and / or SPUSCH comprise a portion of the information, the second DCI includes the remaining portion of the information on SPDSCH and / or SPUSCH. The second DCI may include alteration amount of information about the notified SPDSCH and / or SPUSCH at first DCI.
[0301]
　Second DCI can be among the notified resources in RRC signaling and / or first DCI, it notifies resources SPDSCH and / or SPUSCH is mapped. Thus, it is possible to reduce the amount of information needed to allocate resources.
[0302]
　
　　[Application for base station Example
　　　(first applied example)
　FIG. 20 is a block diagram showing a first example of a schematic configuration of an eNB of the technology according to the present disclosure may be applied. eNB800 has one or more antennas 810, and the base station apparatus 820. Each antenna 810 and base station apparatus 820 may be connected to each other via a RF cable.
[0303]
　Each antenna 810, a single or multiple antenna elements (e.g., a plurality of antenna elements of MIMO antennas) have, is used to send and receive radio signals by the base station apparatus 820. eNB800 has a plurality of antennas 810 as shown in FIG. 20, a plurality of antennas 810, for example, may correspond to a plurality of frequency bands eNB800 uses. Although in FIG. 20 shows an example in which ENB800 has a plurality of antennas 810, ENB800 may have a single antenna 810.
[0304]
　The base station apparatus 820 includes a controller 821, a memory 822, a network interface 823 and a wireless communication interface 825.

claims
[Requested item 1]
　A terminal apparatus for communicating with a base station apparatus,
　and a control unit that sets one or more second TTI set by the control information from the base station apparatus,
　when the second TTI setting is set, the a first PDCCH corresponding to one TTI, monitoring a second PDCCH corresponding to a second TTI shorter duration than the first TTI, the second mapped to the second TTI receive the PDSCH,
　when the second TTI settings are not set, and monitoring the first PDCCH, and a receiving unit for receiving the first PDSCH is mapped to the first TTI, the terminal device .
[Requested item 2]
　Said second PDSCH, the sent in the first PDCCH, and a first downlink control information for the second PDSCH, the sent in the second PDCCH, second for the second PDSCH It is scheduled based on the downlink control information, the terminal device according to claim 1.
[Requested item 3]
　The receiving unit, when the first PDCCH including a first downlink control information for the second PDSCH is not detected, no monitoring the second PDCCH, the terminal device according to claim 2.
[Requested item 4]
　Number of bits of the first downlink control information, the first is PDSCH same number of bits of downlink control information transmitted in the first PDCCH for scheduling, terminal device according to claim 2 .
[Requested item 5]
　Candidate first PDCCH to be the monitoring, and if the second TTI setting is set different between the case where the second TTI setting is not set, the terminal device according to claim 1.
[Requested item 6]
　Aggregation levels are different for the candidate terminal apparatus according to claim 5.
[Requested item 7]
　Downlink control information format for the candidate is different, the terminal device according to claim 5.
[Requested item 8]
　RNTI is different for said candidate terminal apparatus according to claim 5.
[Requested item 9]
　Search spaces are different with respect to the candidate, the terminal device according to claim 5.
[Requested item 10]
　If the second TTI setting is set, it transmits a second PUSCH mapped to the second TTI,
　when the second TTI setting is not set, the mapped to the first TTI further comprising a transmission unit that transmits the first PUSCH,
　the second PUSCH, the sent in the first PDCCH, and a first downlink control information for the second PUSCH, in the second PDCCH is transmitted are scheduled based on the second downlink control information for the second PUSCH, the terminal device according to claim 1.
[Requested item 11]
　A base station device communicating with the terminal device,
　and a control unit that sets one or more second TTI set by the control information to the terminal device,
　when the second TTI setting is set, the a first PDCCH corresponding to one TTI, monitoring a second PDCCH corresponding to a second TTI shorter duration than the first TTI, the second mapped to the second TTI of sending the PDSCH,
　when the second TTI setting is not set, the first PDCCH monitoring, and a transmitter for transmitting a first PDSCH is mapped to the first TTI, the base station apparatus.
[Requested item 12]
　A communication method used in a terminal device communicating with the base station apparatus,
　a step of setting one or more second TTI set by the control information from the base station apparatus,
　the second TTI settings are set that case, a first PDCCH corresponding to a first TTI, monitoring a second PDCCH corresponding to a second TTI shorter duration than the first TTI, mapped to the second TTI receiving a second PDSCH that is,
　when the second TTI setting is not set, and receiving the first PDCCH monitoring, first PDSCH is mapped to the first TTI the having, communication method.
[Requested item 13]
　A communication method used in a base station device communicating with the terminal device,
　and setting one or more second TTI set by the control information to the terminal device,
　the second TTI settings are set that case, a first PDCCH corresponding to a first TTI, monitoring a second PDCCH corresponding to a second TTI shorter duration than the first TTI, mapped to the second TTI transmitting a second PDSCH that is,
　when the second TTI setting is not set, and transmitting the first PDCCH monitoring, first PDSCH is mapped to the first TTI the having, communication method.