0001]The present disclosure, the terminal apparatus, a base station apparatus and a communication method.
Background technique
[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)", or "Evolved Universal . that Terrestrial Radio Access (EUTRA) "and also referred to) is the third generation partnership project (3rd generation partnership project: has been studied in 3GPP). In the following description, LTE includes LTE-A, LTE-A Pro, and the EUTRA. In LTE, the base station apparatus (base station) eNodeB (an evolved NodeB), the terminal apparatus (mobile station, the mobile station apparatus, terminal) also referred a UE (User Equipment). LTE is a 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]
　LTE is a frequency division duplex (Frequency Division Duplex: FDD) and time division duplex: corresponds to (Time Division Duplex TDD). The LTE which adopted the FDD system also referred to as FD-LTE or LTE FDD. TDD is by frequency division multiplexing the uplink signal and the downlink signal is a technology that allows full-duplex communication in at least two frequency bands. The LTE employing the TDD scheme is also referred to as TD-LTE or LTE TDD. TDD is that by time-division multiplexing the uplink signal and the downlink signal is a technology that allows full-duplex communication in a single frequency band. Details of FD-LTE and TD-LTE is disclosed in Non-Patent Document 1.
[0004]
　The base station apparatus, the physical resources configured based on predefined frame structure, and maps the physical channel and the physical signal, and transmits. Terminal apparatus receives a physical channel and a physical signal transmitted from the base station apparatus. In LTE, defining a plurality of frame structure type, data transmission is performed using a physical resource of a frame configuration corresponding to the respective frame structure type. For example, the frame structure type 1 applicable to FD-LTE frame structure type 2 is applicable to TD-LTE. Details of the frame structure, is disclosed in Non-Patent Document 1.
[0005]
　In LTE, the predetermined time interval is defined as a unit time for transmitting data. Such time interval transmission time intervals: is referred to as (TTI Transmission Time Interval). For example, TTI is 1 millisecond, in which case the one TTI corresponds to one subframe length. Base station apparatus and the terminal apparatus, based on the TTI, performs transmission and reception of physical channels and / or physical signals. TTI Details of are disclosed in Non-Patent Document 2.
[0006]
　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. Therefore, the time (delay, latency) for data transmission will be determined depending on the TTI. Procedure for such data transmission is disclosed in Non-Patent Document 3.
CITATION
Non-Patent Document
[0007]
非特許文献1 : 3rd　Generation　Partnership　Project;　Technical　Specification　Group　Radio　Access　Network;　Evolved　Universal　Terrestrial　Radio　Access　(E-UTRA);　Physical　Channels　and　Modulation　(Release　12),　3GPP　TS　36.211　V12.7.0　(2015-09).
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　12),　3GPP　TS　36.300　V12.7.0　(2015-09).
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　V12.7.0　(2015-09).
Summary of the Invention
Problems that the Invention is to Solve
[0008]
　In LTE, only 1 millisecond TTI are defined, physical channels and physical signals are defined based on the TTI of 1 millisecond. Also, the time required for data transmission is also an integral multiple of one millisecond. Therefore, in the use case time required for data transmission is important, 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, in consideration of the time required for data transmission, to improve the transmission efficiency of the entire system it base station apparatus may, terminal device, 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 the upper layer processing unit that sets one or more second PDCCH set by higher layer signaling from the base station apparatus, the second If PDCCH setting is not set, only the common search space and the terminal device-specific search space in the first PDCCH monitoring, if the second PDCCH setting is set, the terminal device in at least a second PDCCH specific search space and a reception unit for monitoring, the first PDCCH is transmitted on the basis of the sub-frame defined by a predetermined number of symbols, the second PDCCH, rather than the number of symbols corresponding to the sub-frame and extended subframe small number of symbols, resource set by the second PDCCH set Is transmitted based on the scan block, the terminal device is provided.
[0011]
　Further, according to the present disclosure, a base station device that communicates with the terminal device, and the upper layer processing unit that sets one or more second PDCCH set by higher layer signaling to the terminal device, the If the second PDCCH setting is not set, if a common search space or the terminal device-specific search space in the first PDCCH, and transmits the mapped first PDCCH, second PDCCH configuration is set, at least the terminal-specific search space in the second PDCCH, and a transmitting unit that transmits the mapped second PDCCH, includes a transmitting the first PDCCH, based on the sub-frame defined by a predetermined number of symbols is, the second PDCCH is extended subfolder of fewer symbols than the number of symbols corresponding to the sub-frame And over beam, it is transmitted based on the resource blocks set by the second PDCCH set, 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 PDCCH set by higher layer signaling from the base station apparatus , when said second PDCCH setting is not set, if only the common search space and the terminal device-specific search space in the first PDCCH monitoring, the second PDCCH setting is set, the terminal in at least a second PDCCH comprising the steps of monitoring the system-specific search space, wherein the first PDCCH is transmitted on the basis of the sub-frame defined by a predetermined number of symbols, the second PDCCH is corresponding to the sub-frame and extended subframe fewer symbols than the number of symbols, the second PDCCH Is transmitted based on the resource blocks set by the constant, a 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 PDCCH set by higher layer signaling to the terminal device , if the second PDCCH setting is not set, if a common search space or the terminal device-specific search space in the first PDCCH, and transmits the mapped first PDCCH, second PDCCH configuration is set , the terminal device-specific search space in at least a second PDCCH, and transmitting by mapping second PDCCH, have, the first PDCCH is based on the sub-frame defined by a predetermined number of symbols sent Te, the second PDCCH is less thin than the number of symbols corresponding to the sub-frame And the number of extended sub-frame of Le, the transmitted based on the resource blocks set by the second PDCCH setting, 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]
[1] is a diagram showing an example of a downlink sub-frame of this embodiment.
2 is a diagram showing an example of an uplink subframe of the present embodiment.
3 is a schematic block diagram showing a configuration of a base station apparatus 1 of the present embodiment.
4 is a schematic block diagram showing the configuration of the terminal device 2 of this embodiment.
5 is a diagram showing an example of a resource element mapping in the downlink in the present embodiment.
6 is a diagram showing an example of a TTI in this embodiment.
7 is a diagram showing an example of a TTI in this embodiment.
Is a diagram illustrating an example of a set of FIG. 8] SPDSCH candidates.
9 is a diagram showing an example of the SPDCCH set and SPDSCH in this embodiment.
It is a diagram illustrating an example of the SPDCCH set and SPDSCH the PDCCH region and PDSCH in FIG. 10 embodiment.
11 is a diagram showing an example of SREG the configuration in this embodiment.
It is a diagram showing an example of SCCE configuration in FIG. 12 embodiment.
13 is a diagram showing an example of a transmission of the HARQ-ACK for the HARQ-ACK and PDSCH for SPDSCH.
14 is a diagram showing an example of SPDCCH and / or SPDSCH resource element mapping.
Is a block diagram showing a first example of a schematic configuration of an eNB techniques may be applied according to FIG. 15 the present disclosure.
Is a block diagram showing a second exemplary configuration of an eNB [16] the technology according to the present disclosure may be applied.
17 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.
18 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.
[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 the S1 interface. 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. The S1 interface between the MME and / or S-GW and the base station apparatus 1 and supports a many-to-many connections.
[0019]
　　
　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.
[0020]
　Subframe, the downlink subframe (first subframe), uplink subframe (the second sub-frame), and including special subframe (third sub-frame).
[0021]
　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. The three fields, DwPTS (Downlink Pilot Time Slot), a GP (Guard Period), and UpPTS (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 the downlink transmission. 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.
[0022]
　Single radio frame is a downlink sub-frame, composed of the uplink subframe, and / or special subframe. Also, a single radio frame is a downlink sub-frame, may be formed of only the uplink subframe or special subframe.
[0023]
　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.
[0024]
　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.
[0025]
　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.
[0026]
　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 one 10 subframes in the radio frame, downlink subframe, may correspond to one of the uplink subframe and special subframe.
[0027]
　The base station apparatus 1 in the DwPTS of the special subframe, PCFICH, PHICH, PDCCH, EPDCCH, PDSCH, synchronization signals, and may send a downlink reference 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 be transmitted PRACH, and SRS. That is, the terminal device 2, can be limited in the UpPTS of the special subframe, PUCCH, PUSCH, and the transmission of the DMRS.
[0028]
　Figure 1 is a diagram showing an example of a downlink sub-frame of this embodiment. The view shown in FIG. 1 is referred to as downlink resource grid. The base station apparatus 1, in the downlink sub-frame from the base station apparatus 1 to the terminal device 2 can transmit downlink physical channel and / or downlink physical signals.
[0029]
　Downlink physical channels are 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 physical downlink control channel), a physical downlink shared channel (PDSCH: physical downlink shared channel), and, including PMCH (physical Multicast channel). Downlink physical signal, the synchronization signal (SS: Synchronization signal), the reference signal (RS: Reference Signal) and the detection signal (DS: Discovery signal) and the like. In Figure 1, for simplicity, the region of PDSCH and PDCCH are shown.
[0030]
　Synchronization signal, the primary synchronization signal (PSS: Primary synchronization signal) and the secondary synchronization signal (SSS: Secondary synchronization signal) and the like. 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).
[0031]
　Figure 2 is a diagram showing an example of the uplink sub-frame of this embodiment. The view shown in FIG. 2 is referred to as an uplink resource grid. The terminal apparatus 2, in the uplink sub-frame from the terminal device 2 to the base station apparatus 1 can transmit the uplink physical channels and / or uplink physical signals. Uplink physical channel includes 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 . Uplink physical signal, the reference signal: including (Reference Signal RS).
[0032]
　Reference signal in the uplink, 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.
[0033]
　Collectively downlink physical channels and downlink physical signals, referred to as a downlink signal. Collectively uplink physical channels and uplink physical signal, referred to as an uplink signal. Collectively downlink physical channels and uplink physical channels, referred to as a physical channel. Collectively downlink physical signals and uplink physical signal, referred to as a physical signal.
[0034]
　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.
[0035]
　　
　In the present embodiment, 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 the resource elements of a physical channel (such as PDSCH or PUSCH). 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]
　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.
[0038]
　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.
[0039]
　　
　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.
[0040]
　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.
[0041]
　　
　PBCH is used to inform the MIB (Master Information Block) is a specific broadcast information in the serving cell of the base station apparatus 1. PBCH is transmitted only in subframes 0 in the radio frame. MIB can be updated at 40ms interval. PBCH is repeatedly transmitted in the 10ms period. Specifically, SFN (System Frame Number) in subframe 0 initial transmission of the MIB is carried out in a satisfying radio frame modulo is 0 at 4, at subframe 0 in all other radio frames re-transmission of the MIB (repetition) is performed. SFN is the number of the radio frames (system frame number). MIB is a system information. For example, MIB includes information indicating the SFN.
[0042]
　PCFICH is used to transmit the information about the number of OFDM symbols used for transmitting the PDCCH. Area indicated by PCFICH is referred to as PDCCH region. Information transmitted in PCFICH is referred to as CFI (Control Format Indicator).
[0043]
　PHICH is uplink data from the base station apparatus 1 receives: transmitting (Uplink Shared Channel UL-SCH) for ACK (acknowledgment) or NACK HARQ-ACK indicating the (Negative acknowledgment) (HARQ indicator, HARQ feedback response information) They are used to. For example, but when receiving the HARQ-ACK indicating the ACK, it does not retransmit the corresponding uplink data. For example, if the terminal device 2 receives the HARQ-ACK indicating the NACK, it retransmits the uplink data terminal device 2 corresponding in a predetermined uplink subframe. There PHICH transmits the HARQ-ACK for a uplink data. The base station apparatus 1 transmits using a plurality of PHICH respective HARQ-ACK for a plurality of uplink data included in the same PUSCH.
[0044]
　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).
[0045]
　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.
[0046]
　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).
[0047]
　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.
[0048]
　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.
[0049]
　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.
[0050]
　PMCH is multicast data (Multicast Channel: MCH) is used to transmit.
[0051]
　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.
[0052]
　　
　synchronization signal, the terminal device 2 is used to synchronize the frequency domain and / or time domain of the downlink. Synchronization signal, PSS (Primary Synchronization
Signal) and SSS (Secondary
including 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.
[0053]
　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.
[0054]
　Downlink reference signals, channel estimation of the terminal device 2 is a downlink physical channel, channel compensation, the downlink CSI (Channel State
Calculation of Information, the channel state information), and / or the measurement of positioning of the terminal device 2 used to perform.
[0055]
　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.
[0056]
　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.
[0057]
　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.
[0058]
　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.
[0059]
　CSI-RS is transmitted in subframe set. Resources CSI-RS is transmitted is set by the base station apparatus 1. CSI-RS is used for the terminal device 2 calculates the downlink channel state information. Terminal device 2 performs signal measurement (channel measurement) using a CSI-RS. CSI-RS supports the setting of some or all of the antenna ports of 1,2,4,8,12,16,24 and 32. CSI-RS is transmitted in one or more antenna ports 15-46. The antenna ports are supported, the terminal device capability terminal device 2, setting the RRC parameters, and / or may be determined based, such as the transmission mode to be set.
[0060]
　Resources ZP CSI-RS is set by higher layers. Resources ZP CSI-RS is transmitted at a power of zero output. That is, the resources of the ZP CSI-RS does not transmit anything. In the set resource of the ZP CSI-RS, PDSCH and EPDCCH is not transmitted. For example, resource ZP CSI-RS is used for adjacent cells to transmit the NZP CSI-RS. Further, for example, resources ZP CSI-RS is used to measure the CSI-IM.
[0061]
　Resources CSI-IM is set by the base station apparatus 1. Resources CSI-IM, in CSI measurement, a resource that is used to measure interference. Resources of CSI-IM is, overlap with part of the resources of the ZP CSI-RS (overlap) and can be set. For example, if a resource of the CSI-IM is set overlap with a part of the resources of the ZP CSI-RS, signals from the cell to be CSI measurement on the resource is not transmitted. In other words, the base station apparatus 1, in the set resource of the CSI-IM, does not transmit the like PDSCH or EPDCCH. Therefore, the terminal device 2 can perform efficiently CSI measurement.
[0062]
　MBSFN RS is transmitted over the entire band of a sub-frame used for transmitting the PMCH. MBSFN RS is used to perform demodulation of the PMCH. PMCH is transmitted on transmit antenna ports used for MBSFN RS. MBSFN RS is transmitted at the antenna port 4.
[0063]
　PRS, the terminal device 2 is used to measure the positioning of the terminal device 2. PRS is transmitted by the antenna port 6.
[0064]
　TRS can be mapped only predetermined sub-frame. For example, TRS is mapped to a sub-frame 0 and 5. Further, TRS can be used the same configuration as part or all of the CRS. For example, in each of the resource blocks, the position of the resource elements TRS is mapped can be the same as the position of the resource elements CRS antenna port 0 is mapped. Also, sequences used in TRS (value) can be determined based PBCH, PDCCH, the information set through EPDCCH or PDSCH (RRC signaling). Sequence used in the TRS (value), the cell ID (for example, physical layer cell identifier), can be determined based on parameters such as the slot number. Sequence used in the TRS (value) can be determined by different methods (expression) and the sequence (the value) used in the CRS antenna port 0.
[0065]
　　
　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,.
[0066]
　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.
[0067]
　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.
[0068]
　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.
[0069]
　　
　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.
[0070]
　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.
[0071]
　In SRS, as trigger type of different SRS, trigger type 0SRS and Trigger Type 1SRS are defined. Trigger type 0SRS is by upper layer signaling, is transmitted when the parameters are set regarding trigger type 0SRS. Trigger type SRS is by high layer signaling, the parameters are set regarding trigger type SRS, DCI format 0,1A, 2B, 2C, and transmitted when the transmission by SRS request included in 2D or 4, it is requested. Incidentally, SRS request for DCI format 0,1A or 4, included in both the FDD and TDD, DCI format 2B, 2C, or for 2D, is included only in the TDD. If the transmission of the transmission and trigger type 1SRS trigger type 0SRS occurs in the same sub-frame of the same serving cell, the transmission of the trigger type 1SRS takes precedence.
[0072]
　　
　Fig. 3 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.
[0073]
　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: RRC) performs processing of the 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.
[0074]
　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 may be used to control all or part of the base station apparatus 1.
[0075]
　Higher layer processing unit 101, a 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 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.
[0076]
　In the radio resource control in the upper layer processing unit 101, downlink data (transport block), system information, RRC message (RRC parameters), and / or, generation and / or management of MAC CE (Control Element) are performed.
[0077]
　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.
[0078]
　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, frequency and sub-allocate a physical channel (PDSCH and PUSCH) frame, such as code rate and modulation scheme and transmission power of the physical channel (PDSCH and PUSCH) 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).
[0079]
　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.
[0080]
　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.
[0081]
　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: the extraction of the signal in the frequency domain by FFT).
[0082]
　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.
[0083]
　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.
[0084]
　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.
[0085]
　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.
[0086]
　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.
[0087]
　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.
[0088]
　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.
[0089]
　　
　Fig. 4 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.
[0090]
　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.
[0091]
　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.
[0092]
　Higher layer processing unit 201, a 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.
[0093]
　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.
[0094]
　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.
[0095]
　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.
[0096]
　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.
[0097]
　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,.
[0098]
　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).
[0099]
　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.
[0100]
　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.
[0101]
　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.
[0102]
　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.
[0103]
　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.
[0104]
　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.
[0105]
　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.
[0106]
　　
　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.
[0107]
　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).
[0108]
　　
　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.
[0109]
　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.
[0110]
　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.
[0111]
　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.
[0112]
　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.
[0113]
　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.
[0114]
　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.
[0115]
　　 DCI is transmitted using a 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.
[0116]
　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.
[0117]
　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.
[0118]
　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.
[0119]
　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.
[0120]
　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.
[0121]
　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.
[0122]
　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.
[0123]
　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.
[0124]
　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.
[0125]
　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.
[0126]
　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.
[0127]
　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.
[0128]
　　
　terminal 2 reports the CSI to the base station apparatus 1 (report). Time and frequency resources used for reporting CSI is controlled by the base station apparatus 1. The terminal apparatus 2, settings for CSI is performed by the RRC signaling from the base station apparatus 1. The terminal apparatus 2, at a given transmission mode, one or more CSI process is set. CSI reported by the terminal device 2 corresponds to the CSI process. For example, CSI process is a unit of the control or setting about the CSI. Each CSI process, CSI-RS resource, CSI-IM resource settings for periodic CSI reporting (e.g., reporting period and offset), and / or can be set settings for aperiodic CSI reports independently.
[0129]
　CSI is composed of CQI (Channel quality indicator), PMI (Precoding matrix indicator), PTI (Precoding type indicator), RI (Rank indicator), and / or CRI (CSI-RS resource indicator). RI indicates the number of transmission layers (number of ranks). PMI is information indicating a predefined precoding matrix. PMI is a single information or pieces of information, indicating one precoding matrix. PMI in the case of using the two information are referred to as first PMI and the second PMI. CQI is information indicating a combination of a predefined modulation scheme and a coding rate. CRI, when CSI-RS resource is set two or more in one CSI process, it is information indicating a one CSI-RS resource selected from those CSI-RS resource (single instance). Terminal 2 reports the CSI for recommended base station apparatus 1. The terminal apparatus 2, for each transport block (codeword), reports the CQI satisfying a predetermined reception quality.
[0130]
　In CRI report, it is selected one CSI-RS resource from CSI-RS resource set. If the CRI is reported, the reported PMI, CQI and RI is calculated (selected) based on the reported CRI. For example, if the CSI-RS resources set are precoded respectively, by the terminal device 2 to report the CRI, suitable precoding (beam) is reported to the terminal device 2.
[0131]
　Periodic CSI reporting possible sub-frame (reporting instances), the parameter of the upper layer (CQIPMI index, RI indices, CRI index) is set by, is determined by the period and the sub-frame offset of the report. The parameter of the upper layer can be set independently for the sub-frame set which is set up to measure the CSI. If only one information to a plurality of subframe set not set, the information may be common among the subframe set. In each of the serving cell, one or more periodic CSI report is set by higher layer signaling.
[0132]
　CSI report types, supports the PUCCH CSI reporting mode. CSI report type, also referred to as PUCCH report type. Type 1 report supports the CQI feedback for the terminal selected subband. Type 1a report, supports the sub-band CQI and feed bank of the second PMI. Type 2, type 2b, 2c type report, supports the feedback of wideband CQI and PMI. Type 2a report supports a feed bank of the wide-band PMI. Type 3 report, supports the feedback of RI. Type 4 report, supports the feedback of wide band CQI. Type 5 report, supports the feedback of RI and wideband PMI. Type 6 report, supports the feedback of RI and the PTI. Type 7 report, supports the feedback of CRI and RI. Type 8 report, it supports the feedback of CRI and the RI and wideband PMI. Type 9 report, supports the feedback of CRI and the RI and the PTI. Type 10 report, supports the CRI of feedback.
[0133]
　The terminal apparatus 2, information about the CSI measurement and CSI report is set from the base station apparatus 1. CSI measurement reference signal and / or reference resource (e.g., CRS, CSI-RS, CSI-IM resource, and / or DRS) is performed based on. Reference signal used for CSI measurement is determined based on such setting of the transmission mode. CSI measurement is carried out based on the interference measurement with the channel measurement. For example, channel measurement measures the power of the desired cell. Interference measurements, measures the non-desired cell power and noise power.
[0134]
　For example, the CSI measurement, the terminal device 2 performs the interference measurement with the channel measurement based on the CRS. For example, the CSI measurement, the terminal device 2 performs the channel measurement based on the CSI-RS, perform interference measurements based on CRS. For example, the CSI measurement, the terminal device 2 performs the channel measurement based on the CSI-RS, perform interference measurement based on the CSI-IM resource.
[0135]
　CSI process is set as the information unique to the terminal device 2 by higher layer signaling. Terminal device 2, one or more CSI process is set, perform CSI measurement and CSI reporting based on the configuration of the CSI process. For example, the terminal device 2, when a plurality of CSI process is set to report multiple CSI based on their CSI processes independently. Each CSI process set for the cell status information, CSI process identifier, configuration information about CSI-RS, setting information related to CSI-IM, subframe pattern set for CSI reporting, periodic CSI reporting setting information on, and / or contains configuration information about the aperiodic CSI reporting. The setting for the cell state information may be common to a plurality of CSI processes.
[0136]
　Terminal device 2 uses the CSI reference resource to perform CSI measurement. For example, the terminal device 2, using a group of downlink physical resource blocks indicated by the CSI reference resource, measures the CSI when the PDSCH is transmitted. If CSI subframe set is set by higher layer signaling, each CSI reference resource belongs to one of the CSI subframe set, it does not belong to both the CSI subframe set.

claims

A terminal apparatus for communicating with a base station apparatus,
　and the upper layer processing unit that sets one or more second PDCCH set by higher layer signaling from the base station apparatus,
　the second PDCCH setting is not set If, only common search space and the terminal device-specific search space in the first PDCCH monitoring, if the second PDCCH configuration is set, a receiving section for monitoring the terminal-specific search space in at least a second PDCCH , comprising a
　first PDCCH is transmitted on the basis of the sub-frame defined by a predetermined number of symbols,
　the second PDCCH is extended sub fewer number of symbols than the number of symbols corresponding to the sub-frame a frame, on the resource block which is set by the second PDCCH set It sent Zui, the terminal device.
[Requested item 2]
　The receiving unit, when the second PDCCH configuration is set, does not monitor the terminal-specific search space in the first PDCCH, the terminal device according to claim 1.
[Requested item 3]
　The receiving unit, when said second PDCCH setting is set, monitoring the common search space in the further first PDCCH, the terminal device according to claim 1.
[Requested item 4]
　The receiving unit, when said second PDCCH setting is set, monitoring the common search space in the further second PDCCH, the terminal device according to claim 1.
[Requested item 5]
　Wherein the combination of the second possible values ​​of the resource blocks used for transmitting the PDCCH is determined based on the number of symbols of the extended sub-frame set by the second PDCCH setting terminal according to claim 1 apparatus.
[Requested item 6]
　It said minimum value included in the combination of the possible values, the increases as the number of symbols of the extended sub-frame is small, the terminal device according to claim 5.
[Requested item 7]
　A base station device communicating with the terminal device,
　and the upper layer processing unit that sets one or more second PDCCH set by higher layer signaling, to the terminal device
　the second PDCCH setting is not set If, in the common search space or the terminal device-specific search space in the first PDCCH, and transmits the mapped first PDCCH, when said second PDCCH setting is set, the terminal device in at least a second PDCCH specific the search space, a transmitting unit for transmitting the mapped second PDCCH, includes a
　　first PDCCH is transmitted on the basis of the sub-frame defined by a predetermined number of symbols,
　the second PDCCH is the extended sub-frame of a small number of symbols than the number of symbols corresponding to the sub-frame, the second P It is transmitted based on the resource blocks set by CCH setting, the base station apparatus.
[Requested item 8]
　A communication method used in a terminal device communicating with the base station apparatus,
　a step of setting one or more second PDCCH set by higher layer signaling from the base station apparatus,
　the second PDCCH configuration If not set, only the common search space and the terminal device-specific search space in the first PDCCH monitoring, if the second PDCCH setting is set, the step of monitoring the terminal-specific search space in at least a second PDCCH When having a
　first PDCCH is transmitted on the basis of the sub-frame defined by a predetermined number of symbols,
　the second PDCCH is a smaller number of symbols than the number of symbols corresponding to the sub-frame Li is set and the extended sub-frame, by the second PDCCH set It is transmitted based on the over scan block, communication method.
[Requested item 9]
　A communication method used in a base station device communicating with the terminal device,
　and setting one or more second PDCCH set by higher layer signaling to the terminal device,
　the second PDCCH configuration If not set, the common search space or the terminal device-specific search space in the first PDCCH, if transmitted by mapping a first PDCCH, second PDCCH setting is set, the terminal in at least a second PDCCH the device-specific search space, has a step of transmitting by mapping second PDCCH, and
　the first PDCCH is transmitted on the basis of the sub-frame defined by a predetermined number of symbols,
　the second PDCCH is extended less number of symbols than the number of symbols corresponding to the sub-frame subframe When the transmitted based on the resource blocks set by the second PDCCH setting, a communication method.