Technical field
[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 for setting a SPDSCH set by higher layer signaling from the base station apparatus, when the SPDSCH setting is not set, the PDSCH receiving, when said SPDSCH setting is set, includes a receiving unit for receiving SPDSCH, the said SPDSCH is mapped to any one or more of SPDSCH candidate set based on said SPDSCH setting, the SPDSCH number of symbols of the resource used in the mapping, the terminal apparatus characterized by less than the number of symbols of the resource used in the mapping of the PDSCH is provided.
[0011]
　Further, according to the present disclosure, a base station device that communicates with the terminal apparatus, to the terminal device, and the upper layer processing unit for setting a SPDSCH set by higher layer signaling, if the SPDSCH setting is not set transmits PDSCH, when said SPDSCH setting is set, includes a transmitting unit that transmits the SPDSCH, the said SPDSCH is mapped to any one or more of SPDSCH candidate set based on the SPDSCH setting is the number of symbols of the resource used in the mapping of the SPDSCH the base station apparatus is provided, characterized in that fewer than the number of symbols of the resource used in the mapping of the PDSCH.
[0012]
　Further, according to the present disclosure, there is provided a communication method for use in a terminal device communicating with the base station apparatus, and setting a SPDSCH set by higher layer signaling from the base station apparatus, the SPDSCH setting is not set If, receives PDSCH, when said SPDSCH setting is set, a receiving a SPDSCH, the said SPDSCH is any one or more of SPDSCH candidate set based on the SPDSCH setting mapped, the number of symbols of the resource used in the mapping of the SPDSCH to a communication method, characterized in that fewer than the number of symbols of the resource used in the mapping of the PDSCH is provided.
[0013]
　Further, according to the present disclosure, there is provided a communication method used in a base station device communicating with the terminal apparatus, to the terminal device, and setting a SPDSCH set by higher layer signaling, the SPDSCH configuration settings If non is, it sends the PDSCH, when said SPDSCH setting is set, has a step of transmitting the SPDSCH, the said SPDSCH may be any one or more SPDSCH candidate set based on the SPDSCH setting It is mapped to the number of symbols of the resource used in the mapping of the SPDSCH to a communication method, characterized in that fewer than the number of symbols of the resource used in the mapping of the PDSCH 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.
It is a diagram illustrating an example of the HARQ-ACK reporting in SPDSCH transmitting the terminal apparatus in FIG. 9 the base station apparatus.
Is a diagram illustrating an example of the HARQ-ACK reporting in SPDSCH transmitting the terminal apparatus in FIG. 10 the base station apparatus.
It is a view showing a flowchart of FIG. 11 terminal device STTI setting is set.
Is a diagram illustrating an example of the operation of FIG. 12 base station apparatus and the terminal apparatus when performing the setting for the same SPDSCH the plurality of terminal devices.
13 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.
14 is a block diagram showing a second exemplary configuration of an eNB of the technology according to the present disclosure may be applied.
15 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.
16 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 a S1 interface to an. Furthermore, the base station apparatus 1 may be connected to the MME (Mobility Mnagement 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.
[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 Ramdom 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.

The scope of the claims
[Requested item 1]
　A terminal apparatus for communicating with a base station apparatus,
　and the upper layer processing unit for setting a SPDSCH set by higher layer signaling from the base station apparatus,
　when the SPDSCH setting is not set to receive the PDSCH, the SPDSCH set If There is set, includes a receiving unit for receiving SPDSCH, and
　the SPDSCH is mapped to any one or more of SPDSCH candidate set based on said SPDSCH set,
　used to map the SPDSCH the number of symbols of the resource is less than the number of symbols of the resource used in the mapping of the PDSCH, the terminal device.
[Requested item 2]
　The number of symbols of the resource used in the mapping of PDSCH is predefined, the number of symbols of the resource used in the mapping of the SPDSCH is set on the basis of the SPDSCH setting, the terminal device according to claim 1.
[Requested item 3]
　The receiving unit performs the reception processing on all of the SPDSCH candidate terminal apparatus according to claim 1.
[Requested item 4]
　The receiving unit is configured to receive a PDCCH including control information to enable scheduling of SPDSCH set based on the SPDSCH set,
　the receiving unit, when the control information is detected, the reception processing start, the terminal device according to claim 3.
[Requested item 5]
　The receiving unit receives the PDCCH including control information for releasing the scheduling of SPDSCH that is set based on the SPDSCH set,
　the receiving unit, when the control information is detected, it stops the receiving process to, the terminal device according to claim 3.
[Requested item 6]
　A base station apparatus for communicating with the terminal apparatus,
　to the terminal device, and the upper layer processing unit for setting a SPDSCH set by higher layer signaling,
　transmits when the SPDSCH setting is not set, the PDSCH, the SPDSCH If the configuration is set, includes a transmitting unit that transmits the SPDSCH, and
　the SPDSCH is mapped to any one or more of SPDSCH candidate set based on said SPDSCH set,
　used in the mapping of the SPDSCH the number of symbols of the resource to be is less than the number of symbols of the resource used in the mapping of the PDSCH, the base station apparatus.
[Requested item 7]
　The number of symbols of the resource used in the mapping of PDSCH is predefined, the number of symbols of the resource used in the mapping of the SPDSCH is set on the basis of the SPDSCH setting, the base station apparatus according to claim 6.
[Requested item 8]
　Wherein all SPDSCH candidate is assumed to be received and processed to the terminal device, the base station apparatus according to claim 6.
[Requested item 9]
　The transmitting unit transmits a PDCCH including control information to enable scheduling of SPDSCH that is set based on the SPDSCH set,
　and the transmission unit, when the control information is transmitted, the terminal device assume to start the reception process, the base station apparatus according to claim 8.
[Requested item 10]
　The transmitting unit receives a PDCCH including control information for releasing the scheduling of SPDSCH that is set based on the SPDSCH set,
　and the transmission unit, when the control information is transmitted, the terminal device receives assume to stop processing, the base station apparatus according to claim 8.
[Requested item 11]
　A communication method used in a terminal device communicating with the base station apparatus,
　and setting a SPDSCH set by higher layer signaling from the base station apparatus,
　when the SPDSCH setting is not set to receive the PDSCH, the If SPDSCH setting is set, a receiving a SPDSCH, and
　the SPDSCH is mapped to any one or more of SPDSCH candidate set based on said SPDSCH set,
　the mapping of the SPDSCH the number of symbols of the resource used is less than the number of symbols of the resource used in the mapping of the PDSCH, a communication method.
[Requested item 12]
　A communication method used in a base station device communicating with the terminal apparatus,
　to the terminal device, and setting a SPDSCH set by higher layer signaling,
　transmits when the SPDSCH setting is not set, the PDSCH, If the SPDSCH setting is set, has a step of transmitting the SPDSCH, and
　the SPDSCH is mapped to any one or more of SPDSCH candidate set based on said SPDSCH setting,
　mapping of the SPDSCH the number of symbols of the resources used is less than the number of symbols of the resource used in the mapping of the PDSCH, a communication method.