WO2021029124A1 - 送信装置、受信装置、送信方法及び受信方法 - Google Patents
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- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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Definitions
- the present disclosure relates to a transmitting device, a receiving device, a transmitting method, and a receiving method.
- NR New Radio
- LTE Long Term Evolution
- 3rd 3rd
- the non-limiting examples of the present disclosure contribute to the provision of a transmitting device, a receiving device, a transmitting method, and a receiving method capable of improving the reliability of the transmitting channel.
- the transmitting device has a time of either a first time section in which the first channel and the second channel are arranged and a second time section in which the first channel is arranged.
- the first time based on the control circuit that determines the transmission size in the other time interval and the determined transmission size based on the amount of time resources used to determine the transmission size of the first channel for the interval.
- a transmission circuit that performs transmission processing of the first channel in the section and the second time section is provided.
- the reliability of the transmission channel can be improved.
- TBS Transport Block Size
- a base station (sometimes called eNB) assigns a downlink data signal or an uplink data signal to a terminal (for example, UE: User Equipment).
- a terminal for example, UE: User Equipment.
- the size of the transport block (TB: Transport Block) (for example, TBS: Transport Block Size) is specified to the terminal by the control information.
- the downlink data signal corresponds to the downlink data channel (PDSCH: Physical Downlink Shared CHannel)
- the uplink data signal corresponds to the uplink data channel (PUSCH: Physical Uplink Shared CHannel)
- the control information corresponds to the downlink control channel (PDCCH).
- PDSCH Physical Downlink Shared CHannel
- PUSCH Physical Uplink Shared CHannel
- the control information corresponds to the downlink control channel (PDCCH).
- PDCCH Physical Downlink Control CHannel
- TBS is also called, for example, the amount of information bits.
- the terminal determines the number of resources in the frequency domain (for example, resource block (RB: Resource block) or PRB (Physical RB)) included in the PDCCH and modulation coding during PDSCH decoding or PUSCH coding. Based on the method (MCS: Modulation and Coding Scheme), the TBS and coding rate determined by the base station are determined (for example, calculated). The terminal determines the receive buffer size or the transmit buffer size based on, for example, the determined TBS.
- resource block Resource block
- PRB Physical RB
- NR has also agreed to support TBS decisions based on control information at terminals.
- TBS has, for example, the amount of resources in the frequency domain allocated for TB transmission (for example, the number of RBs), as well as the amount of resources in the time domain allocated for that TB transmission (for example, the number of RBs). For example, it is determined based on the number of symbols) (see, for example, Non-Patent Document 1). The determination of TBS based on the amount of resources in the time domain is because NR enables data allocation with a specified number of symbols.
- NR in addition to cellular communication, communication with automobiles (for example, V2X: Vehicle to Everything), communication via artificial satellites (for example, NTN: Non-Terrestrial Network), or ultra-reliable and low-delay communication (for example).
- URLLC Ultra-Reliable and Low-Latency Communications
- Techniques for improving the reliability of data transmission include, for example, techniques for transmitting the same TB multiple times (for example, called regression and blind retransmission).
- a base station for example, also called eNB or gNB
- a terminal for example, also called UE
- the receiving side may mistakenly recognize the reception of different TBs and may not be able to synthesize the TBs. Therefore, depending on the TBS setting, it may not be possible to improve the reliability of TB transmission.
- the base station or the transmitting terminal determines the size of the data signal (for example, TBS) at the time of PDSCH or PUSCH transmission. Further, the control information including the resource allocation of PDSCH or PUSCH is transmitted from the base station or the transmitting terminal to the receiving terminal by, for example, a channel different from PDSCH (for example, PDCCH).
- a channel different from PDSCH for example, PDCCH
- the base station or the receiving terminal receives a data signal (for example, TB), the resource allocation information in the time area of TB and the resource allocation information in the frequency area (for example) notified from the base station or the transmitting terminal by the control information.
- PRB number number of demodulation reference signals (DM-RS: DeModulation Reference Signal), MCS order, or TBS is determined (for example, calculated) based on information such as coding rate (Coding Rate).
- TBS determination example (calculation example) will be explained.
- the terminal calculates RE number contained within 1PRB the (N 'RE).
- the RE number ( N'RE ) may be calculated according to the following equation (1).
- N Symb sh indicates the number of symbols assigned to PDSCH
- N DMRS PRB is contained within 1 PRB. Indicates the number of REs used in the DM-RS, and Now PRB indicates the value set by the upper layer.
- the UE calculates the total number of REs (N RE ) assigned to PDSCH, for example, according to the following equation (2).
- n PRB indicates the total number of PRBs assigned to the UE.
- the terminal calculates N info indicating the intermediate value (Intermediate Number) of the number of information bits of the data transmitted in PDSCH.
- N info may be calculated according to the following equation (3).
- R indicates the code rate (Target Code Rate)
- Q m indicates the modulation order
- v indicates the number of layers.
- the terminal determines the TBS based on the quantized value N'info according to the value of the median N info .
- the TBS determination example (example using calculation) has been explained above.
- resources are allocated to each transmission in the repeated transmission or retransmission of the same TB, for example, by an individual control signal (for example, PDCCH, PUCCH, or Physical Sidelink Shared CHannel (PSSCH)). Therefore, even if the TB is the same, different TBSs can be calculated for repeated transmission or retransmission, for example, at the time of initial transmission and at the time of retransmission.
- an individual control signal for example, PDCCH, PUCCH, or Physical Sidelink Shared CHannel (PSSCH)
- the base station or the receiving terminal determines the buffer size in the receiving buffer based on the TBS calculated at the time of TB reception.
- the receive buffer temporarily buffers the received TB.
- the base station or the receiving terminal synthesizes and decodes the buffered TB of the previous transmission (for example, the first transmission) and the TB at the time of repeated transmission or retransmission.
- the size of the data to be combined (or the buffer in which the data is buffered) will be different, and the reliability of the decoding result will be improved by the synthesis. It may not be possible to improve.
- SL Sidelink
- PC5 Physical Sidelink Control CHannel Support for channels such as (PSCCH), PSSCH, Physical Sidelink Feedback CHannel (PSFCH), or Physical Sidelink Broadcast CHannel (PSBCH) is expected.
- PSSCH is a channel for TB transmission. It is assumed that the transmitting terminal determines TBS at the time of TB transmission by PSSCH, and the receiving terminal determines (for example, calculates) TBS at the time of TB reception by PSSCH.
- PSFCH is a channel for notifying the transmitting terminal of the success or failure of decryption of PSSCH.
- PSFCH resources for example, it is assumed that at least the last symbol in a certain slot is used.
- PSFCH is not limited to the case where it is transmitted for each slot. For example, if there is no terminal that sends PSFCH, it is assumed that no resources will be allocated to PSFCH.
- the cycle of the slot to which the PSFCH resource can be allocated for example, one of the cycles such as every slot, 1 slot in 2 slots, and 1 slot in 4 slots can be assumed.
- Information about the period of slots to which PSFCH resources can be allocated is assumed to be set in, for example, an upper layer or an application layer. Support for other cycles will also be considered. Further, it is expected that whether or not PSFCH resources are allocated changes not only in resources in the time domain but also in resources in the frequency domain (for example, subchannels).
- PSFCH resources are allocated for each subchannel or slot, or the amount of PSFCH resources can vary. Therefore, resources allocated to channels different from PSFCH, such as PSSCH, are also allocated for each subchannel or slot. It is assumed that it can fluctuate to.
- the terminal cannot send and receive at the same time. For example, even if the terminal is a subchannel to which PSFCH is not assigned, when transmitting / receiving PSFCH on another subchannel, the terminal may not be able to transmit / receive PSCCH at the symbol to which PSFCH is transmitted / received.
- the amount of resources that can be allocated to TB may differ depending on the resources in the frequency domain and the resources in the time domain allocated to each transmission. Therefore, the TBS determined (or calculated) by the transmitter and the receiver may also differ from transmission to transmission. Since the TBS for each transmission is different, for example, the effect of improving the reliability of transmission in repeated transmission or retransmission may not be obtained.
- the communication system according to the present embodiment is, for example, a communication system that supports NR V2X communication (which may be referred to as "side link communication").
- the communication system according to the present embodiment includes, for example, a plurality of terminals 100.
- the terminal 100 may include, for example, one or both of a transmitting terminal and a receiving terminal.
- FIG. 1 is a block diagram showing a partial configuration example of the transmission terminal 100a according to the present embodiment.
- the control unit (for example, corresponding to a control circuit) is, for example, either a first time section (for example, a first slot) or a second time section (for example, a second slot).
- the transmission data size in the other time interval may be determined based on the amount of time resources (for example, the number of symbols) used to determine the transmission data size (for example, TBS) for one time interval.
- a data channel for example, PSSCH
- a channel different from the data channel for example, PSFCH
- a data channel may be arranged, but a channel different from the data channel may not be arranged.
- the transmission unit (for example, corresponding to a transmission circuit) performs processing (for example, coding, modulation, transmission, retransmission, etc.) of data channels in the first time interval and the second time interval based on the determined transmission data size. Including).
- FIG. 2 is a block diagram showing a partial configuration example of the receiving terminal 100b according to the present embodiment.
- the control unit (for example, corresponding to a control circuit) is, for example, either a first time section (for example, a first slot) or a second time section (for example, a second slot).
- the transmission data size in the other time interval may be determined based on the amount of time resources (for example, the number of symbols) used to determine the transmission data size (for example, TBS) for one time interval.
- a data channel for example, PSSCH
- a channel different from the data channel for example, PSFCH
- a data channel may be arranged, but a channel different from the data channel may not be arranged.
- the receiving unit (for example, corresponding to a receiving circuit) performs reception processing (including processing such as demodulation, decoding and synthesis) of the data channel in the first time interval and the second time interval based on the determined transmission data size. Do.
- FIG. 3 is a block diagram showing a configuration example of the terminal 100 according to the present embodiment.
- the terminal 100 includes a PSFCH setting unit 101, a resource pool setting unit 102, an SCI generation unit 103, an ACK / NACK generation unit 104, a TBS determination unit 105, a transmission data buffer unit 106, and error correction.
- TBS calculation unit 116 and reception data buffer unit 117 are examples of reception data buffer unit 117.
- the terminal 100 shown in FIG. 3 has a configuration in which one processing system for transmission data and one processing system for reception data are included. For example, in V2X, communication with a base station (not shown) and communication between terminals 100 and between terminals 100 are performed. Since two types of communication are assumed, two transmission / reception data processing systems may be included.
- control unit shown in FIG. 1 may include, for example, the TBS determination unit 105 shown in FIG. 3, and the transmission unit may include, for example, the transmission data buffer unit 106 and the transmission unit 110 shown in FIG.
- control unit shown in FIG. 2 may include, for example, the TBS calculation unit 116 shown in FIG. 3
- reception unit may include, for example, the reception unit 111 and the reception data buffer unit 117 shown in FIG.
- the PSFCH setting unit 101 allocates PSFCH resources (for example, slots or) used for feedback from the receiving terminal to the transmitting terminal based on the information regarding the PSFCH setting input from the error correction decoding unit 115, for example. Set at least one of the subchannels). For example, the PSFCH setting unit 101 outputs information related to the PSFCH setting to the signal separation unit 112 in the case of a data transmitting terminal related to the set PSFCH, and assigns a signal in the case of a receiving terminal related to the set PSFCH. Output to unit 109.
- PSFCH resources for example, slots or
- the resource pool setting unit 102 sets, for example, a resource group (for example, called a resource pool) in a frequency and time domain that can be used in side link communication.
- the resource pool setting unit 102 sets the resource pool (for example, time resource and frequency resource) used by the terminal 100 for the side link based on the information about the resource pool input from the error correction decoding unit 115.
- the resource pool setting unit 102 outputs information about the set resource pool to, for example, the SCI generation unit 103, the signal allocation unit 109, and the signal separation unit 112 at the transmission terminal, and outputs to the signal separation unit 112 at the reception terminal.
- the SCI generation unit 103 generates control information (for example, SCI) to be transmitted from the transmitting terminal to the receiving terminal, for example, based on the information input from the resource pool setting unit 102.
- the SCI may contain, for example, information about the resource that sends the PSSCH.
- the SCI generation unit 103 outputs the generated SCI to the signal allocation unit 109 and the signal separation unit 112.
- the ACK / NACK generation unit 104 determines whether or not the received data signal has been successfully decoded based on the received data signal input from the error correction decoding unit 115.
- the ACK / NACK generation unit 104 indicates, for example, whether or not to feed back information regarding the success or failure of decoding of the received data signal based on the determination result, or either ACK (decoding success) or NACK (decoding failure).
- ACK decoding success
- NACK decoding failure
- the TBS determination unit 105 determines the TBS to be set in the transmission data signal (for example, TB). For example, the TBS determination unit 105 is based on resource allocation information of a transmission data signal or information notified from an upper layer (for example, information related to PSFCH such as a slot containing allocated resources, a subchannel, or a resource pool). TBS may be determined. The TBS determination unit 105 outputs information about the determined TBS to the transmission data buffer unit 106.
- the transmission data buffer unit 106 temporarily buffers the transmission data signal.
- the transmission data buffer unit 106 may output the buffered transmission data signal to the error correction coding unit 107, for example, when the transmission data signal is repeatedly transmitted or retransmitted. Further, the transmission data buffer unit 106 may determine the amount of data to be buffered (also referred to as a buffer size) based on the information regarding TBS input from the TBS determination unit 105.
- the transmission data buffer unit 106 may be, for example, a circular buffer.
- the error correction coding unit 107 takes a transmission data signal or a higher layer signal (also referred to as a higher layer parameter; not shown) as an input, error corrects the input signal, and sends the coded signal to the modulation unit 108. Output.
- a higher layer signal also referred to as a higher layer parameter; not shown
- the modulation unit 108 modulates the signal input from the error correction coding unit 107, and outputs the modulated signal to the signal allocation unit 109.
- the signal allocation unit 109 for example, is a PSCCH signal including the SCI based on the information input from the PSFCH setting unit 101, the information input from the resource pool setting unit 102, and the information input from the SCI generation unit 103.
- the PSSCH signal including the signal input from the modulation unit 108 or the PSFCH signal including the signal input from the ACK / NACK generation unit 104 is assigned to the radio resource of the side link.
- the signal allocation unit 109 outputs the signal allocated to the resource to the transmission unit 110.
- the transmission unit 110 performs wireless transmission processing such as up-conversion on the signal input from the signal allocation unit 109, and transmits the transmission signal to the receiving terminal via the antenna.
- the receiving unit 111 receives the signal transmitted from the transmitting terminal via the antenna, performs reception processing such as down-conversion on the received signal, and then outputs the signal to the signal separation unit 112.
- the signal separation unit 112 is input from the reception unit 111 based on, for example, the information input from the PSFCH setting unit 101, the information input from the resource pool setting unit 211, or the information input from the SCI reception unit 113. Of the signals, the signal component of PSCCH is output to the SCI receiving unit 113, and the signal component of PSSCH is output to the demodulating unit 114.
- the SCI receiving unit 113 reads the control information transmitted from the transmitting terminal based on the signal component (for example, SCI) of the PSCCH input from the signal separating unit 112 (may be referred to as “receive”). For example, the SCI receiving unit 113 may output the PSSCH resource allocation information addressed to the terminal 100 included in the SCI to the signal separation unit 112. Further, the SCI receiving unit 113 may output information related to TBS included in the SCI to the TBS calculating unit 116.
- the signal component for example, SCI
- the SCI receiving unit 113 may output the PSSCH resource allocation information addressed to the terminal 100 included in the SCI to the signal separation unit 112. Further, the SCI receiving unit 113 may output information related to TBS included in the SCI to the TBS calculating unit 116.
- the demodulation unit 114 performs demodulation processing on the signal input from the signal separation unit 112, and outputs the obtained demodulation signal to the error correction decoding unit 115.
- the error correction decoding unit 115 decodes the demodulated signal input from the demodulation unit 114, outputs information on the PSFCH setting included in the obtained upper layer signaling to the PSFCH setting unit 101, and outputs information on the resource pool to the resource pool setting. Output to unit 102. Further, the error correction / decoding unit 115 outputs the obtained received data signal to the ACK / NACK generation unit 104 and the reception data buffer unit 117.
- the TBS calculation unit 116 is based on the information related to TBS input from the SCI reception unit 113 (for example, the resource allocation information of TB or the information related to PSFCH in the slot, subchannel, or resource pool containing the allocated resource). Then, the TBS set in the received data is determined (for example, calculated). The TBS calculation unit 116 outputs the calculated TBS to the reception data buffer unit 117.
- the received data buffer unit 117 temporarily buffers the received data signal input from the error correction decoding unit 115.
- the reception data buffer unit 117 may synthesize the buffered reception data signal and the reception data signal input from the error correction decoding unit 115, for example, when the transmission data signal is repeatedly transmitted or retransmitted. Further, the reception data buffer unit 117 may determine the amount of data to be buffered (also referred to as a buffer size) based on the information regarding TBS input from the TBS calculation unit 116.
- the reception data buffer unit 117 may be, for example, a circular buffer.
- control information related to the side link such as PSFCH setting information or resource pool setting information is not limited to signaling in the upper layer, and may be set in, for example, an application layer called "Pre-configured", and the subscriber identity provided in the terminal 100. It may be preset in the module (SIM).
- FIG. 4 is a flowchart showing an example of processing of the terminal 100.
- the transmitting terminal determines the TBS of the transmitted data (for example, TB) (ST101). For example, the transmitting terminal may determine TBS based on the resource allocation information of PSSCH and the information related to PSFCH.
- the transmitting terminal transmits, for example, PSCCH including SCI and PSSCH including transmission data to the receiving terminal (ST102).
- the transmitting terminal transmits transmission data (TB), for example, based on the determined TBS.
- the transmission terminal buffers the transmission data in the transmission data buffer unit 106.
- the transmission terminal may determine the buffer size of the transmission data based on, for example, TBS. PSCCH and PSSCH are received by the receiving terminal.
- the receiving terminal determines (or calculates) the TBS of the data transmitted from the transmitting terminal (ST103). For example, the receiving terminal may determine the TBS to be set in the received data based on the resource allocation information included in the SCI and the setting information regarding PSFCH from the upper layer. Further, the receiving terminal buffers the received data in the receiving data buffer unit 117. The receiving terminal may determine the buffer size of the received data based on, for example, TBS.
- the receiving terminal transmits, for example, PSFCH including ACK / NACK for the received data to the transmitting terminal (ST104).
- the receiving terminal may determine, for example, a slot for transmitting PSFCH based on the PSFCH setting information.
- the transmitting terminal may retransmit the transmitted data, for example, based on the PSFCH fed back from the receiving terminal.
- the transmitting terminal may repeatedly transmit the transmitted data.
- the transmitting terminal and the receiving terminal may, for example, repeat the processes of ST101 to ST104 shown in FIG.
- parameters related to side links may be predetermined for the terminal 100, for example, in the standard, or may be set in an application layer called Pre-configured.
- SIM may be preset, or may be set in a higher layer such as SIB or other RRC called configured.
- the terminal 100 (for example, a transmitting terminal and a receiving terminal) is assigned to PSFCH or is assigned to PSFCH in a plurality of time intervals (for example, a plurality of slots) in repeated transmission or retransmission of TB.
- a fixed value may be set in TBS regardless of the fluctuation of the amount of resources to be received.
- the TBS in each of the plurality of slots may be determined without considering, for example, some or all of the variation in the allocated resources of the transmitted data signal for each slot, subchannel or resource pool.
- "decide without considering XX” means "determine without considering XX", “determine without depending on XX", “determine independently of XX", May be replaced with each other.
- the TBS determination methods 1 to 3 will be described below.
- the terminal 100 determines (or calculates) the TBS to be set in the transmission data based on, for example, the resource allocation information of the transmission data signal (for example, PSSCH) and the information about PSFCH. To do. For example, terminal 100 may determine TBS without considering whether PSSCH is allocated, part or all of the amount of resources allocated to PSFCH, or settings or notifications regarding resource allocation.
- the resource allocation information of the transmission data signal for example, PSSCH
- the information about PSFCH For example, terminal 100 may determine TBS without considering whether PSSCH is allocated, part or all of the amount of resources allocated to PSFCH, or settings or notifications regarding resource allocation.
- the terminal 100 is assigned the number of symbols N symb sh assigned to the data signal used for the TBS determination in the receiving terminal to the PSFCH regardless of whether or not the symbol assigned to the PSF CH exists in the slot.
- the terminal 100 may set the number of symbols N symb sh assigned to the data signal used for the TBS determination in the receiving terminal to the number of symbols of PSSCH when PSFCH is not assigned.
- FIG. 5 shows the amount of resources in the time domain (for example, the number of symbols) allocated to TB (for example, PSSCH signal) in the determination method 1, and the amount of resources in the time domain of TB used for determining (or calculating) TBS. An example of the relationship with is shown.
- the resources actually allocated to TB (PSSCH) (for example, symbols) are allocated without overlapping with the resources allocated to PSFCH. It should be noted that the term “overlap” may be read as "collision”.
- PSFCH is not assigned, and PSSCH is assigned up to the last symbol in the slot.
- PSFCH is assigned and assigned to the last symbol in the slot.
- PSSCH is assigned to a symbol different from PSFCH in the slot.
- the terminal 100 determines the TBS based on the number of symbols in which the PSSCH (for example, TB) is arranged in the slot shown in FIG. 5A, which includes the PSSCH and does not include the PSFCH. In other words, the terminal 100 determines (or calculates) TBS based on the allocation of PSSCH shown in FIG. 5A regardless of whether or not PSFCH in the slot is allocated.
- the PSSCH for example, TB
- the terminal 100 determines (or calculates) TBS based on the allocation of PSSCH shown in FIG. 5A regardless of whether or not PSFCH in the slot is allocated.
- the terminal 100 determines TBS based on the PSSCH allocation (for example, the number of symbols) in the slot shown in FIG. 5A even in the slot shown in FIG. 5B (when PSFCH is assigned). In other words, the terminal 100 determines the TBS in the slot shown in FIG. 5 (b) based on the number of symbols used in determining the TBS in the slot shown in FIG. 5 (a).
- PSSCH is allocated to a resource that does not overlap with the resource of PSFCH in consideration of the allocated resource of PSFCH.
- TBS determination (for example, TBS calculation)
- the PSSCH in the slot shown in FIG. 5 (a) is determined regardless of the presence or absence of PSFCH allocation and without considering the PSFCH allocation resource (for example, symbol).
- TBS is determined based on the allocated resources.
- the terminal 100 uses a data signal for determining the TBS in a certain slot (for example, the slot of FIG. 5A) among a plurality of slots for repeated transmission or retransmission.
- the number of symbols assigned to N symb sh is also used to determine the TBS in other slots (eg, the slot of FIG. 5B).
- the terminal 100 can determine the same TBS in a plurality of slots regardless of the presence or absence of PSFCH.
- the terminal 100 determines (or calculates) the TBS to be set in the transmission data based on, for example, the resource allocation information of the transmission data signal (for example, PSSCH) and the information about PSFCH. To do. For example, terminal 100 may determine TBS in consideration of whether PSSCH is allocated, part or all of the amount of resources allocated to PSFCH, or settings or notifications regarding resource allocation.
- the resource allocation information of the transmission data signal for example, PSSCH
- the information about PSFCH For example, terminal 100 may determine TBS in consideration of whether PSSCH is allocated, part or all of the amount of resources allocated to PSFCH, or settings or notifications regarding resource allocation.
- the terminal 100 is assigned the number of symbols N symb sh assigned to the data signal used for the TBS determination in the receiving terminal to the PSFCH regardless of whether or not the symbol assigned to the PSF CH exists in the slot. Set to a value that does not include the number of symbols.
- the terminal 100 may set the number of symbols N symb sh assigned to the data signal used for the TBS determination in the receiving terminal to the number of symbols of PSSCH when PSFCH is assigned.
- FIG. 6 shows the amount of resources in the time domain (for example, the number of symbols) allocated to TB (for example, PSSCH signal) in the determination method 2, and the amount of resources in the time domain of TB used for determining (or calculating) TBS. An example of the relationship with is shown.
- the resources actually allocated to TB (PSSCH) (for example, symbols) are allocated without overlapping with the resources allocated to PSFCH.
- PSFCH is not assigned, and PSSCH is assigned up to the last symbol in the slot.
- PSFCH is assigned and assigned to the last symbol in the slot.
- PSSCH is assigned to a symbol different from PSFCH in the slot.
- the terminal 100 determines the TBS based on the number of symbols in which the PSSCH (for example, TB) is arranged in the slot shown in FIG. 6 (b) including the PSSCH and the PSFCH. In other words, the terminal 100 determines (or calculates) TBS based on the PSSCH allocation shown in FIG. 6 (b) regardless of whether or not the PSFCH in the slot is allocated.
- the PSSCH for example, TB
- the terminal 100 determines (or calculates) TBS based on the PSSCH allocation shown in FIG. 6 (b) regardless of whether or not the PSFCH in the slot is allocated.
- the terminal 100 determines the TBS based on the PSSCH allocation (for example, the number of symbols) in the slot shown in FIG. 6B even in the slot shown in FIG. 6A (when no PSFCH allocation is made). In other words, the terminal 100 determines the TBS in the slot shown in FIG. 6A based on the number of symbols used in determining the TBS in the slot shown in FIG. 6B.
- the PSSCH allocation for example, the number of symbols
- the terminal 100 determines the TBS in the slot shown in FIG. 6A based on the number of symbols used in determining the TBS in the slot shown in FIG. 6B.
- PSSCH is allocated to a resource that does not overlap with the resource of PSFCH in consideration of the allocated resource of PSFCH.
- TBS determination (for example, TBS calculation)
- the allocation of PSSCH in the slot shown in FIG. 6B is taken into consideration regardless of the presence or absence of PSFCH allocation, considering the allocation resource (for example, symbol) of PSFCH.
- TBS is determined based on resources.
- the terminal 100 uses a data signal for determining the TBS in a certain slot (for example, the slot of FIG. 6B) among a plurality of slots for repeated transmission or retransmission.
- the number of symbols assigned to N symb sh is also used to determine the TBS in other slots (eg, the slot of FIG. 6A ).
- the terminal 100 can determine the same TBS in a plurality of slots regardless of the presence or absence of PSFCH.
- the terminal 100 determines the TBS set in the transmission data based on, for example, the resource allocation information of the transmission data signal (for example, PSSCH) and the information regarding PSFCH. Determine (or calculate).
- the terminal 100 determines the number of symbols N symb sh assigned to the data signal used for the TBS determination, for example, based on the setting or notification for the terminal 100. In other words, the terminal 100 determines whether or not to consider the setting related to PSFCH when determining TBS, based on the setting or notification.
- the amount of resources allocated to PSSCH in the slot including PSSCH and not including PSFCH (for example, the number of symbols) is the same as in the determination method 1.
- the TBS may be determined based on.
- the terminal 100 is set or notified to consider the setting related to PSFCH, it is based on the allocated resource amount (for example, the number of symbols) of PSSCH in the slot including PSSCH and PSFCH as in the determination method 2.
- TBS may be determined.
- the amount of time resources based on the TBS determination (for example, the number of symbols N symb sh ) is arranged by TB in one of the slot containing PSSCH and not containing PSFCH and the slot containing PSSCH and PSFCH. It is a value based on the number of symbols to be made, and one of the above slots is notified to the terminal 100 or set in the terminal 100.
- the terminal 100 can select, for example, the determination method suitable for the TBS determination by the terminal 100 from the determination method 1 and the determination method 2.
- the method of determining TBS may be set or notified to the terminal 100 based on the capacity of the terminal 100 (for example, UE capability or buffer size, etc.).
- the number of symbols assigned to the TB (for example, N symb sh ) is, for example, a standard (or a specification). ) Defines a fixed value or candidate group.
- the number of symbols N symb sh assigned to the data signal used in the TBS calculation of the receiving terminal may be set to a fixed value in the standard, or may be selected from the candidate group defined in the standard.
- the terminal 100 may determine a candidate to be selected from the candidate group based on the notification by SCI or the setting by the upper layer or the like. , May be determined according to certain criteria.
- the transmitting terminal and the receiving terminal have the number of symbols assigned to TB used when determining TBS (or calculating TBS), and whether or not the assigned symbols overlap with the symbols that can be assigned to PSFCH. Determine the TBS based on.
- a resource that is not assigned to another channel or signal different from PSSCH in the slot is set as a resource assigned to PSSCH.
- resources assigned to other channels or signals different from PSSCH include, for example, PSCCH, PSFCH, symbols corresponding to transmission / reception and transmission / reception switching transient times, or automatic gain control (AGC: Automatic Gain Control). May include resources assigned to the symbol corresponding to.
- the terminal 100 transmitting terminal or receiving terminal determines, for example, the number of symbols N symb sh used in determining TBS, depending on whether the resources allocated to PSSCH overlap with the resources that can be allocated to PSFCH. Good.
- the terminal 100 may set the number of symbols assigned to the PSSCH to N symb sh .
- the terminal 100 may set N symb sh to a value obtained by adding the number of symbols assigned to PSFCH to the number of symbols assigned to PSSCH .
- the first symbol in the slot of the resource to which the data channel (for example, PDSCH or PSSCH) is assigned by the control information (for example, DCI or SCI) and the assigned symbol length, such as NR of Rel.16. Is expected to be notified.
- the control information for example, DCI or SCI
- the transmitting terminal and the receiving terminal may determine whether or not the resource allocated to PSSCH and the resource that can be allocated to PSFCH overlap.
- the value of the number of symbols N symb sh in the TBS determination differs depending on the judgment result by the transmitting terminal and the receiving terminal. For example, when the PSSCH resource and the PSFCH resource overlap, the number of symbols assigned to PSSCH is set to the value of the number of symbols N symb sh in the TBS determination. On the other hand, if the PSSCH resource and the PSFCH resource do not overlap, the value obtained by adding the number of symbols assigned to PSFCH to the number of symbols assigned to PSSCH is set to the value of the number of symbols N symb sh in the TBS determination. Will be done.
- the terminal 100 (transmitting terminal or receiving terminal) is related to the repeated transmission or retransmission regardless of the duplication of the PSSCH resource and the PSFCH resource.
- the same TBS can be determined for a data signal (eg PSSCH).
- the terminal 100 can flexibly allocate resources to each transmission data, for example, according to the situation of the slot or the sub-channel.
- a resource that is not assigned to another channel or signal different from PSSCH in the slot is set as a resource assigned to PSSCH.
- the resources assigned to other channels or signals different from PSSCH include, for example, PSCCH, PSFCH, symbols corresponding to transmission / reception and transmission / reception switching transient times, or resources assigned to symbols corresponding to AGC. May be included.
- the terminal 100 transmitting terminal or receiving terminal determines, for example, the number of symbols N symb sh used in determining TBS, depending on whether the resources allocated to PSSCH overlap with the resources that can be allocated to PSFCH. Good.
- the terminal 100 may set N symb sh to a value obtained by subtracting the number of symbols assigned to PSFCH from the number of symbols assigned to PSSCH .
- the terminal 100 may set the number of symbols assigned to the PSSCH to N symb sh .
- the control information eg DCI or SCI
- the transmitting terminal and the receiving terminal may determine whether or not the resource allocated to PSSCH and the resource that can be allocated to PSFCH overlap.
- the value of the number of symbols N symb sh in the TBS determination differs depending on the judgment result by the transmitting terminal and the receiving terminal. For example, when the PSSCH resource and the PSFCH resource overlap, the value obtained by subtracting the number of symbols assigned to PSFCH from the number of symbols assigned to PSSCH is set to the value of the number of symbols N symb sh in the TBS determination. On the other hand, if the PSSCH resource and the PSFCH resource do not overlap, the number of symbols assigned to PSSCH is set to the value of the number of symbols N symb sh in the TBS determination.
- the terminal 100 (transmitting terminal or receiving terminal) is related to the repeated transmission or retransmission regardless of the duplication of the PSSCH resource and the PSFCH resource.
- the same TBS can be determined for a data signal (eg PSSCH).
- the terminal 100 can flexibly allocate resources to each transmission data, for example, according to the situation of the slot or the sub-channel.
- the number of symbols (N symb sh ) recognized by the receiving terminal as being assigned to the data signal used in the TBS determination is, for example, the data signal as shown in FIG. 5 (b). Can be more than the number of symbols actually assigned to.
- the TBS set in the TB can be larger than the TBS determined based on the number of symbols actually assigned to the TB.
- TB may be allocated to a resource smaller than the resource corresponding to the determined TBS (eg, PSSCH resource).
- the transmitting terminal may thin out the transmitted data, for example. This process is also referred to as, for example, puncturing or puncturing.
- the transmission terminal can allocate the punctured transmission data to, for example, a resource smaller than the resource corresponding to the determined TBS (for example, the PSSCH resource).
- the allocated resource becomes smaller. It is possible to suppress the reduction of transmission reliability due to. In addition, the reliability of transmission can be further improved by repeatedly transmitting TB.
- the number of symbols (N symb sh ) recognized by the receiving terminal as being assigned to the data signal used in the TBS determination is, for example, the data signal as shown in FIG. 6A .
- the TBS set in the TB can be smaller than the TBS determined based on the number of symbols actually assigned to the TB.
- TB can be allocated to a resource that is larger than the resource corresponding to the determined TBS (eg, PSSCH resource).
- the transmitting terminal may adjust the coding rate by adding a redundant bit or the like to the transmitted data, for example.
- the transmitting terminal can allocate transmission data with redundant bits added to, for example, a resource larger than the resource corresponding to the determined TBS (for example, a PSSCH resource).
- NR V2X for example, it is assumed that a single SCI reserves resources for multiple PSSCHs on a resource pool to avoid collisions with transmissions from other terminals. This operation is also called "Resource reservation". In Resource reservation, multiple PSSCHs may be used for repeated transmissions or retransmissions of the same TB, or for different TBs.
- TBS determination (or TBS calculation) of TB transmitted in multiple PSSCHs is described in TBS as described above. 1 to 3 may be applied.
- the receiving terminal may receive and decode each of the multiple PSSCHs.
- the same TBS can be calculated. By calculating the same TBS, the reliability of the decoding result can be improved by synthesizing the decoding result based on multiple PSSCHs.
- the terminal 100 (for example, a transmitting terminal and a receiving terminal) has a PSSCH transmission size (for example, a slot in which PSSCH and PSFCH are arranged, and a slot in which PSSCH is arranged.
- a PSSCH transmission size for example, a slot in which PSSCH and PSFCH are arranged, and a slot in which PSSCH is arranged.
- the TBS in the other slot is determined based on the number of symbols used in the determination of TBS). Then, the transmitting terminal performs the PSSCH transmission processing in each slot based on the determined TBS, and the receiving terminal performs the PSSCH reception processing in each slot based on the determined TBS.
- the TBS in each transmission can be set to be the same.
- the buffer size of the transmission data or the reception data can be set to be the same, and the reliability of the transmission channel (for example, PSSCH or TB) can be improved.
- NR V2X NR V2X
- eMBB enhanced mobile broadband
- URLLC enhanced mobile broadband
- NTN NR-U
- the transmitting terminal in the above embodiment is replaced with a base station or terminal
- PSCCH is replaced with PDCCH or PUCCH
- PSSCH is replaced with PDSCH or PUSCH
- PSFCH is replaced with PUCCH
- SCI is replaced with DCI
- the resource pool May be replaced with Component Carrier (CC) and subchannels may be replaced with Bandwidth Part (BWP).
- CC Component Carrier
- BWP Bandwidth Part
- the presence / absence of symbols or the change in the number of symbols is not limited to the case of PSFCH, but may be due to other channels or signals different from PSFCH, other symbols or resources.
- PSFCH instead of PSFCH, in the NRV2X scenario, PSCCH, PSSCH, PSBCH, a symbol corresponding to the transient time of transmission / reception switching or transmission / reception switching, or a symbol corresponding to AGC may be used.
- the presence / absence of symbols or the variation in the number of symbols is assigned to the same subchannel, slot, or subchannel and slot as the resource allocation of the TB corresponding to the TBS.
- PSFCH symbols PSFCH symbols assigned to different subchannels and slots can also be applied.
- the channel for determining the transmission size is not limited to the data channel (for example, PSSCH, PDSCH or PUSCH), and may be another channel.
- the transmission / reception terminal includes, for example, a terminal that performs transmission processing and does not perform reception processing, a terminal that performs reception processing and does not perform transmission processing, or a terminal that performs both transmission and reception. Good.
- PSCCH and PSSCH As an example of the arrangement of PSCCH and PSSCH, for example, as shown in FIGS. 5 and 6, an example in which PSCCH is arranged at the first number symbol of PSSCH has been described, but the arrangement of PSCCH and PSSCH is shown in FIGS. 5 and 6. It is not limited to the arrangement shown.
- the above embodiment can be applied to an arrangement in which PSCCH and PSSCH are time-multiplexed (TDM: Time Division Multiplexing) and an arrangement in which frequency multiplexing (FDM: Frequency Division Multiplexing) is performed.
- TDM Time Division Multiplexing
- FDM Frequency Division Multiplexing
- the PSFCH format is not limited to the format arranged in the last symbol in the slot, and may be another format.
- PSFCH may be placed on a different symbol than the end in the slot.
- PSFCH may be arranged in two or more symbols.
- the present invention is not limited to this, and the TBS is set to a plurality of slots that are repeatedly transmitted or retransmitted.
- TBS may be determined in a slot.
- the TBS set in the plurality of slots that are repeatedly transmitted or retransmitted does not have to be determined for each of the plurality of slots.
- the number of symbols assigned to PSSCH may be, for example, assigned by the corresponding PSCCH, or may be preset when the resource pool is set.
- the slot in which a plurality of TBs are openly transmitted may be a slot that is continuous in time or a slot that is not continuous in time.
- the unit of the time resource is not limited to the combination of slots and symbols, and may be, for example, a time resource unit such as a frame, a subframe, a slot, a subslot, or a symbol, or another resource unit such as a resource element (RE).
- a time resource unit such as a frame, a subframe, a slot, a subslot, or a symbol
- another resource unit such as a resource element (RE).
- RE resource element
- Each functional block used in the description of the above embodiment is partially or wholly realized as an LSI which is an integrated circuit, and each process described in the above embodiment is partially or wholly. It may be controlled by one LSI or a combination of LSIs.
- the LSI may be composed of individual chips, or may be composed of one chip so as to include a part or all of the functional blocks.
- the LSI may include data input and output.
- LSIs may be referred to as ICs, system LSIs, super LSIs, and ultra LSIs depending on the degree of integration.
- the method of making an integrated circuit is not limited to LSI, and may be realized by a dedicated circuit, a general-purpose processor, or a dedicated processor. Further, an FPGA (Field Programmable Gate Array) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connection and settings of the circuit cells inside the LSI may be used.
- the present disclosure may be realized as digital processing or analog processing. Furthermore, if an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology or another technology derived from it, it is naturally possible to integrate functional blocks using that technology. There is a possibility of applying biotechnology.
- the communication device may include a wireless transmitter / receiver (transceiver) and a processing / control circuit.
- the wireless transmitter / receiver may include a receiver and a transmitter, or both as functions.
- the radio transmitter / receiver (transmitter, receiver) may include an RF (Radio Frequency) module and one or more antennas.
- the RF module may include an amplifier, an RF modulator / demodulator, or the like.
- Non-limiting examples of communication devices include telephones (mobile phones, smartphones, etc.), tablets, personal computers (PCs) (laptops, desktops, notebooks, etc.), cameras (digital stills / video cameras, etc.).
- Digital players digital audio / video players, etc.
- wearable devices wearable cameras, smart watches, tracking devices, etc.
- game consoles digital book readers
- telehealth telemedicines remote health Care / medicine prescription
- vehicles with communication functions or mobile transportation automobiles, airplanes, ships, etc.
- combinations of the above-mentioned various devices can be mentioned.
- Communication devices are not limited to those that are portable or mobile, but are not portable or fixed, any type of device, device, system, such as a smart home device (home appliances, lighting equipment, smart meters or Includes measuring instruments, control panels, etc.), vending machines, and any other "Things” that can exist on the IoT (Internet of Things) network.
- a smart home device home appliances, lighting equipment, smart meters or Includes measuring instruments, control panels, etc.
- vending machines and any other "Things” that can exist on the IoT (Internet of Things) network.
- Communication includes data communication using a combination of these, in addition to data communication using a cellular system, wireless LAN system, communication satellite system, etc.
- the communication device also includes devices such as controllers and sensors that are connected or connected to communication devices that perform the communication functions described in the present disclosure.
- devices such as controllers and sensors that are connected or connected to communication devices that perform the communication functions described in the present disclosure.
- controllers and sensors that generate control and data signals used by communication devices that perform the communication functions of the communication device.
- Communication devices also include infrastructure equipment that communicates with or controls these non-limiting devices, such as base stations, access points, and any other device, device, or system. ..
- the transmitting device has a time of either a first time section in which the first channel and the second channel are arranged and a second time section in which the first channel is arranged.
- the first time based on the control circuit that determines the transmission size in the other time interval and the determined transmission size based on the amount of time resources used to determine the transmission size of the first channel for the interval.
- a transmission circuit that performs transmission processing of the first channel in the section and the second time section is provided.
- the time resource amount is the number of symbols in which the first channel is arranged in the first time interval.
- the time resource amount is the number of symbols in which the first channel is arranged in the second time interval.
- the time resource amount is the number of symbols in which the first channel is arranged in either the first time interval or the second time interval, and the one is the same.
- the time interval of is notified to the transmitting device or set to the transmitting device.
- control circuit determines the buffer size of the buffer corresponding to the first channel based on the transmission size.
- the first channel is a data channel that is repeatedly transmitted in the first time interval and the second time interval, or the first time interval and the second time interval.
- the receiving device is the time of either the first time interval in which the first channel and the second channel are arranged and the second time interval in which the first channel is arranged.
- the first time based on the control circuit that determines the transmission size in the other time interval and the determined transmission size based on the amount of time resources used to determine the transmission size of the first channel for the interval. It includes a receiving circuit that performs reception processing of the first channel in the section and the second time section.
- the transmission device is either a first time section in which the first channel and the second channel are arranged, or a second time section in which the first channel is arranged.
- the transmission size in the other time interval is determined based on the amount of time resources used to determine the transmission size of the first channel for one time interval, and the first transmission size is determined based on the determined transmission size.
- the transmission processing of the first channel in the time interval and the second time interval is performed.
- the receiving device is either a first time section in which the first channel and the second channel are arranged, or a second time section in which the first channel is arranged.
- the transmission size in the other time interval is determined based on the amount of time resources used to determine the transmission size of the first channel for one time interval, and the first transmission size is determined based on the determined transmission size.
- the reception processing of the first channel in the time interval and the second time interval is performed.
- One embodiment of the present disclosure is useful for mobile communication systems.
- Terminal 101 PSFCH setting unit 102 Resource pool setting unit 103 SCI generation unit 104 ACK / NACK generation unit 105 TBS determination unit 106 Transmission data buffer unit 107 Error correction coding unit 108 Modulation unit 109 Signal allocation unit 110 Transmission unit 111 Reception unit 112 Signal separation unit 113 SCI reception unit 114 Demodulation unit 115 Error correction decoding unit 116 TBS calculation unit 117 Received data buffer unit
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Abstract
Description
[通信システムの概要]
本実施の形態に係る通信システムは、一例として、NR V2X通信(「サイドリンク通信」と称されてもよい)をサポートする通信システムである。本実施の形態に係る通信システムは、例えば、複数の端末100を備える。端末100は、例えば、送信端末及び受信端末の何れか一方、又は双方の構成を備えてよい。
図3は、本実施の形態に係る端末100の構成例を示すブロック図である。図3において、端末100は、PSFCH設定部101と、リソースプール設定部102と、SCI生成部103と、ACK/NACK生成部104と、TBS決定部105と、送信データバッファ部106と、誤り訂正符号化部107と、変調部108と、信号割当部109と、送信部110と、受信部111と、信号分離部112と、SCI受信部113と、復調部114と、誤り訂正復号部115と、TBS算出部116と、受信データバッファ部117と、を有する。
次に、端末100(例えば、送信端末及び受信端末)の動作の一例について説明する。
端末100(例えば、送信端末又は受信端末)は、例えば、送信データ信号(例えば、PSSCH)のリソース割当情報、及び、PSFCHに関する情報に基づいて、送信データに設定されるTBSを決定(又は算出)する。例えば、端末100は、PSSCHの割当の有無、PSFCHに割り当てられるリソース量の一部又は全て、又は、リソース割当に関する設定又は通知を考慮せずに、TBSを決定してよい。
端末100(例えば、送信端末又は受信端末)は、例えば、送信データ信号(例えば、PSSCH)のリソース割当情報、及び、PSFCHに関する情報に基づいて、送信データに設定されるTBSを決定(又は算出)する。例えば、端末100は、PSSCHの割当の有無、PSFCHに割り当てられるリソース量の一部又は全て、又は、リソース割当に関する設定又は通知を考慮して、TBSを決定してよい。
決定方法3では、端末100(例えば、送信端末又は受信端末)は、例えば、送信データ信号(例えば、PSSCH)のリソース割当情報、及び、PSFCHに関する情報に基づいて、送信データに設定されるTBSを決定(又は算出)する。
動作例1では、TBS決定処理について説明する。
動作例1-1では、送信端末及び受信端末におけるTBS決定の際に用いられるTBへのリソース割当情報のうち、TBに割り当てられるシンボル数(例えば、Nsymb sh)は、例えば、規格(又は仕様)によって固定値又は候補群が規定される。
動作例1-2では、送信端末及び受信端末は、TBS決定(又はTBS算出)の際に用いられるTBに割り当てられるシンボル数、及び、割り当てられるシンボルがPSFCHの割り当てられ得るシンボルに重複するか否かに基づいて、TBSを決定する。
動作例1-2をTBSの決定方法1に適用した例について説明する。
動作例1-2をTBSの決定方法2に適用した例について説明する。
動作例2では、TBS決定及び実際のリソース割当決定の後の処理について説明する。
TBSの決定方法1又は決定方法3において、受信端末がTBS決定の際に用いるデータ信号に割り当てられたと認識するシンボル数(Nsymb sh)は、例えば、図5(b)のように、データ信号に実際に割り当てられたシンボル数よりも多くなり得る。この場合、TBに設定されるTBSは、TBに実際に割り当てられたシンボル数に基づいて決定されるTBSよりも大きくなり得る。また、例えば、図5(b)では、TBは、決定されたTBSに相当するリソースよりも小さいリソース(例えば、PSSCHリソース)に割り当てられ得る。
TBSの決定方法2又は決定方法3において、受信端末がTBS決定の際に用いるデータ信号に割り当てられたと認識するシンボル数(Nsymb sh)は、例えば、図6(a)のように、データ信号に実際に割り当てられたシンボル数よりも小さくなり得る。この場合、TBに設定されるTBSは、TBに実際に割り当てられたシンボル数に基づいて決定されるTBSよりも小さくなり得る。また、例えば、図6(a)では、TBは、決定されたTBSに相当するリソースよりも大きいリソース(例えば、PSSCHリソース)に割り当てられ得る。
動作例3では、Resource reservation時の動作について説明する。
上記実施の形態では、一例として、NR V2Xシナリオを前提とする場合について説明した。しかし、本開示の一実施例は、NR V2Xに限らず、例えば、モバイルブロードバンドの高度化(eMBB: enhanced Mobile Broadband)、URLLC、NTN及びNR-UといったNRをベースとする様々なシナリオにおける同一TBの複数回送信(又は再送)に対して適用可能である。この場合、例えば、上記実施の形態における送信端末を基地局又は端末に置き換え、PSCCHをPDCCH又はPUCCHに置き換え、PSSCHをPDSCH又はPUSCHに置き換え、PSFCHをPUCCHに置き換え、SCIをDCIに置き換え、リソースプールをComponent Carrier(CC)に置き換え、サブチャネルをBandwidth Part(BWP)に置き換えてよい。
101 PSFCH設定部
102 リソースプール設定部
103 SCI生成部
104 ACK/NACK生成部
105 TBS決定部
106 送信データバッファ部
107 誤り訂正符号化部
108 変調部
109 信号割当部
110 送信部
111 受信部
112 信号分離部
113 SCI受信部
114 復調部
115 誤り訂正復号部
116 TBS算出部
117 受信データバッファ部
Claims (9)
- 第1チャネルおよび第2チャネルが配置される第1の時間区間、及び、前記第1チャネルが配置される第2の時間区間の何れか一方の時間区間について前記第1チャネルの送信サイズの決定に用いた時間リソース量に基づいて、他方の時間区間における前記送信サイズを決定する制御回路と、
決定した前記送信サイズに基づいて、前記第1の時間区間及び前記第2の時間区間における前記第1チャネルの送信処理を行う送信回路と、
を具備する送信装置。 - 前記時間リソース量は、前記第1の時間区間において前記第1チャネルが配置されるシンボル数である、
請求項1に記載の送信装置。 - 前記時間リソース量は、前記第2の時間区間において前記第1チャネルが配置されるシンボル数である、
請求項1に記載の送信装置。 - 前記時間リソース量は、前記第1の時間区間及び前記第2の時間区間の何れか一方の時間区間において前記第1チャネルが配置されるシンボル数であり、
前記一方の時間区間は、前記送信装置に通知される、又は、前記送信装置に設定される、
請求項1に記載の送信装置。 - 前記制御回路は、前記送信サイズに基づいて、前記第1チャネルに対応するバッファのバッファサイズを決定する、
請求項1に記載の送信装置。 - 前記第1チャネルは、前記第1の時間区間及び前記第2の時間区間において繰り返し送信されるデータチャネル、又は、前記第1の時間区間及び前記第2の時間区間のうち一方における送信に対して他方において再送されるデータチャネルである、
請求項1に記載の送信装置。 - 第1チャネルおよび第2チャネルが配置される第1の時間区間、及び、前記第1チャネルが配置される第2の時間区間の何れか一方の時間区間について前記第1チャネルの送信サイズの決定に用いた時間リソース量に基づいて、他方の時間区間における前記送信サイズを決定する制御回路と、
決定した前記送信サイズに基づいて、前記第1の時間区間及び前記第2の時間区間における前記第1チャネルの受信処理を行う受信回路と、
を具備する受信装置。 - 送信装置は、
第1チャネルおよび第2チャネルが配置される第1の時間区間、及び、前記第1チャネルが配置される第2の時間区間の何れか一方の時間区間について前記第1チャネルの送信サイズの決定に用いた時間リソース量に基づいて、他方の時間区間における前記送信サイズを決定し、
決定した前記送信サイズに基づいて、前記第1の時間区間及び前記第2の時間区間における前記第1チャネルの送信処理を行う、
送信方法。 - 受信装置は、
第1チャネルおよび第2チャネルが配置される第1の時間区間、及び、前記第1チャネルが配置される第2の時間区間の何れか一方の時間区間について前記第1チャネルの送信サイズの決定に用いた時間リソース量に基づいて、他方の時間区間における前記送信サイズを決定し、
決定した前記送信サイズに基づいて、前記第1の時間区間及び前記第2の時間区間における前記第1チャネルの受信処理を行う、
受信方法。
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