Transmitting apparatus, receiving apparatus, transmitting method, and receiving method

Abstract

The present application improves reliability of a transmission channel. A transmission terminal includes a control circuit that decides a transmission size in one of a first time interval in which a first channel and a second channel are arranged and a second time interval in which the first channel is arranged, based on an amount of time resources used in deciding the transmission size of the first channel in the one time interval, and a transmission circuit that performs transmission processing of the first channel in the first time interval and the second time interval based on the decided transmission size.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a transmission device, a reception device, a transmission method, and a reception method. BACKGROUND

[0002] With respect to standardization of a fifth generation mobile communication system (5G), a new radio access technology (for example, referred to as NR: New Radio) that does not necessarily have backward compatibility with LTE (Long Term Evolution) or LTE-Advanced (Long Term Evolution Advanced) has been discussed in the 3GPP (3rd Generation Partnership Project).

[0003] PRIOR ART DOCUMENTS

[0004] NON-PATENT DOCUMENTS

[0005] Non-Patent Document 1: 3GPP TS 38.214 V15.6.0, "NR; Physical layer procedures for data (Release 15)," 2019-06 SUMMARY

[0006] However, in the new radio access technology, there is room for studying a method for improving reliability of a transmission channel.

[0007] The non-limiting embodiments of the present disclosure are useful in providing a transmission device, a reception device, a transmission method, and a reception method that can improve reliability of a transmission channel.

[0008] The transmission device of one embodiment of the present disclosure includes a control circuit that decides a transmission size in one of a first time interval in which a first channel and a second channel are arranged and a second time interval in which the first channel is arranged, based on an amount of time resources used in deciding the transmission size of the first channel in the one of the time intervals, and a transmission circuit that performs a transmission process of the first channel in the first time interval and the second time interval based on the decided transmission size.

[0009] Note that these general and specific incorporated by reference are implemented by a system, a device, a method, an integrated circuit, a computer program, or a recording medium, or any combination of a system, a device, a method, an integrated circuit, a computer program, and a recording medium.

[0010] According to one embodiment of the present disclosure, it is possible to improve reliability of a transmission channel.

[0011] Further advantages and effects of one embodiment of the present disclosure will be clarified by the description and the drawings. These advantages and / or effects are respectively provided by several embodiments, and the features described in the description and the drawings, but it is not necessary to provide all of them in order to obtain one or more of the same features. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a block diagram showing a configuration example of a part of a transmitting terminal.

[0013] Figure 2 is a block diagram showing a configuration example of a part of a receiving terminal.

[0014] Figure 3 is a block diagram showing a configuration example of a terminal.

[0015] Figure 4 is a flowchart showing an action example of a terminal.

[0016] Figure 5 is a diagram showing an example of a method for determining a transport block size (TBS).

[0017] Figure 6 is a diagram showing an example of a method for determining a TBS. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0019] For example, in LTE / LTE-Advanced, a base station (may also be referred to as eNB, for example) specifies a size of a transport block (TBS) to a terminal (may also be referred to as UE (User Equipment), for example) through control information when allocating a downlink data signal or an uplink data signal for the terminal.

[0020] Further, for example, the downlink data signal corresponds to a downlink data channel (PDSCH (Physical Downlink Shared CHannel)), the uplink data signal corresponds to an uplink data channel (PUSCH (Physical Uplink Shared CHannel)), and the control information corresponds to a downlink control channel (PDCCH (Physical Downlink Control CHannel)). In addition, the TBS is also referred to as an amount of information bits, for example.

[0021] For example, the terminal decides (for example, calculates) the TBS and the coding rate decided by the base station, based on the amount of frequency domain resources (for example, the number of resource blocks (RBs) or PRBs (Physical RBs)) included in the PDCCH, and the modulation and coding scheme (MCS) at the time of PDSCH decoding or PUSCH encoding. The terminal decides, for example, the reception buffer size or the transmission buffer size based on the decided TBS.

[0022] In NR, it has been agreed to support the decision of the TBS in the terminal based on the control information.

[0023] In NR, unlike LTE / LTE-Advanced, the TBS is decided based on, for example, the amount of time domain resources (for example, the number of symbols) allocated for the transmission of the TB, in addition to the amount of frequency domain resources (for example, the number of RBs) allocated for the transmission of the TB (for example, see Non-Patent Literature 1). The TBS is decided based on the amount of time domain resources because data allocation by the number of symbols has become possible in NR.

[0024] In addition, in NR, in addition to cellular communication, support of technologies for improving the reliability of data transmission (for example, TB transmission) in various scenarios such as vehicle communication (for example, V2X (Vehicle to Everything)), communication via artificial satellites (for example, NTN: Non-Terrestrial Network), or ultra-reliable and low-latency communication (for example, URLLC: Ultra-Reliable and Low-Latency Communications) is being studied. The technologies for improving the reliability of data transmission include, for example, a technology for transmitting the same TB multiple times (for example, referred to as repetition and blind retransmission).

[0025] For example, when the same TB is transmitted multiple times, if different TBSs are set for each of the multiple transmissions of the TB, it can be erroneously recognized at the receiving side such as the base station (for example, also referred to as eNB or gNB) or the terminal (for example, also referred to as UE) that different TBs are being received, and the TBs cannot be combined. Therefore, under some TBS settings, it can not be possible to improve the reliability of TB transmission.

[0026] In NR, a base station or a transmitting terminal determines the size (e.g., TBS) of a data signal at the time of PDSCH or PUSCH transmission, for example. In addition, control information including resource allocation of PDSCH or PUSCH is transmitted from the base station or the transmitting terminal to a receiving terminal, for example, through a channel (e.g., PDCCH) different from PDSCH.

[0027] In addition, the base station or the receiving terminal determines (e.g., calculates) the TBS at the time of reception of a data signal (e.g., TB) based on information such as resource allocation information in the time domain of the TB, resource allocation information in the frequency domain (e.g., the number of PRBs), the number of Demodulation Reference Signals (DM-RS), the MCS order, or the Coding Rate, which are notified from the base station or the transmitting terminal according to the control information.

[0028] The following describes an example (calculation example) of determining the TBS.

[0029] For example, the terminal (e.g., UE) calculates the number of REs (N' RE ) contained in 1 PRB. For example, the number of REs (N' RE ) can be calculated according to the following formula (1).

[0030] (Formula 1)

[0031]

[0032] where N SC RB denotes the number of subcarriers (e.g., N SC RB = 12) contained in 1 PRB, N Symb sh denotes the number of symbols allocated to PDSCH, N DMRS PRB denotes the number of REs for DM-RS contained in 1 PRB, N oh PRB denotes a value set by a higher layer.

[0033] Next, the UE calculates the total number of REs (N RE ) allocated to PDSCH, for example, according to the following formula (2).

[0034] (Formula 2)

[0035] N RE = min(156, N' RE ) · n PRB (2)

[0036] where n PRBrepresents the sum of the number of PRBs allocated to the UE.

[0037] Next, the terminal calculates N info , which is an intermediate value representing the number of information bits of data transmitted in the PDSCH. info may be calculated according to the following equation (3).

[0038] (Equation 3)

[0039] N info = N RE · R · Q m · v (3)

[0040] where R represents a target code rate, Q m represents a modulation order, and v represents the number of layers.

[0041] Then, the terminal decides the TBS based on a value N' info quantized from the value of the intermediate value N info

[0042] The above describes an example of deciding the TBS (an example of using a calculation method).

[0043] It is assumed that resources are allocated by separate control signals (e.g., PDCCH, PUCCH, or Physical Sidelink Shared CHannel (PSSCH)) for each transmission, for example, in each transmission of repeated transmissions or retransmissions of the same TB. Therefore, even for the same TB, different TBSs can be calculated in the repeated transmissions or retransmissions, for example, at the time of the initial transmission and at the time of the retransmission.

[0044] For example, the base station or the receiving terminal decides the buffer size of the reception buffer based on the TBS calculated at the time of receiving the TB. Further, the reception buffer temporarily buffers the received TB. Then, at the time of the repeated transmission or retransmission, the base station or the receiving terminal combines the TB of the previous transmission (e.g., the initial transmission) buffered and the TB of the repeated transmission or retransmission and performs decoding.

[0045] Therefore, in the repeated transmissions or retransmissions of the same TB, if the TBSs calculated for each transmission are different, the size of the data to be combined (or the buffer in which the data is buffered) is different, and thus it can be impossible to improve the reliability of the decoding result by combining.

[0046] ​For example, in the V2X scenario of NR, it is envisaged that direct transmission and direct reception between terminals using a link called sidelink (SL) or PC5 (in other words, communication not via a network including a base station) is supported, such as the following channels: Physical Sidelink Control CHannel (PSCCH), PSSCH, Physical Sidelink Feedback CHannel (PSFCH), or Physical Sidelink Broadcast CHannel (PSBCH).

[0047] For example, the PSSCH is a channel for TB transmission. It is envisaged that the transmitting terminal decides the TBS when transmitting a TB on the PSSCH, and the receiving terminal decides (for example, calculates) the TBS when receiving a TB on the PSSCH.

[0048] In addition, for example, the PSFCH is a channel for notifying the transmitting terminal of whether or not decoding of the PSSCH was successful from the receiving terminal. For example, it is envisaged that the last symbol within at least a certain slot is used as a resource for the PSFCH. In addition, it is not limited to the case where the PSFCH is transmitted every slot. For example, it is envisaged that if there is no terminal that transmits the PSFCH, no resource is allocated to the PSFCH.

[0049] In addition, with respect to the period of the slot in which the PSFCH resource can be allocated, for example, one of every slot, one of two slots, and one of four slots can be envisaged. It is envisaged that, for example, information related to the period of the slot in which the PSFCH resource can be allocated is set in a higher layer or an application layer, or the like. In addition, support for other periods is also being studied. In addition, it is not limited to the time domain resource, and for example, it is also envisaged that in the frequency domain resource (for example, subchannel), whether or not the PSFCH resource is allocated differs for each subchannel.

[0050] As a result, whether or not the PSFCH resource is allocated or the amount of the PSFCH resource can differ for each subchannel or slot, and therefore, for example, it is envisaged that the resource allocated to the PSSCH, which is a different channel from the PSFCH, can also differ for each subchannel or slot.

[0051] Furthermore, for example, in sidelink communication, a terminal cannot perform transmission and reception at the same time. For example, it is possible that in a terminal, even in a subchannel in which the PSFCH is not allocated, the terminal cannot transmit the PSCCH in the symbol in which the PSFCH is transmitted when transmitting and receiving the PSFCH on the other subchannel.

[0052] As described above, in the repeated transmission or retransmission of the TB in the NR, the amount of resources that can be allocated to the TB (for example, PSSCH in the sidelink communication) can differ depending on the frequency domain resources and the time domain resources allocated to each transmission. Therefore, the TBS decided (or calculated) in the transmitter and the receiver can also differ for each transmission. Since the TBS differs for each transmission, for example, the effect of improving the transmission reliability of the repeated transmission or retransmission can not be obtained.

[0053] Therefore, in one embodiment of the present disclosure, a method of improving the reliability of transmission in repeated transmission or retransmission is described.

[0054] (Embodiment 1)

[0055] [Outline of communication system]

[0056] The communication system of the present embodiment is an example of a communication system that supports NR V2X communication (which can be referred to as "sidelink communication"). The communication system of the present embodiment, for example, has a plurality of terminals 100. The terminal 100 may, for example, have a structure of one of a transmitting terminal and a receiving terminal, or both.

[0057] Figure 1 is a block diagram showing an example of a structure of a part of the transmitting terminal 100a of the present embodiment. In Figure 1 In the transmitting terminal 100a shown in FIG. 10, for example, with respect to a first time interval (for example, a first slot) and a second time interval (for example, a second slot), the control section (for example, corresponding to a control circuit) decides the transmission data size in the other time interval based on the amount of time resources (for example, the number of symbols) used when deciding the transmission data size (for example, TBS) for one of the time intervals. For example, it can be that a data channel (for example, PSSCH) and a channel different from the data channel (for example, PSFCH) are configured in the first time interval. It can be that a data channel is configured in the second time interval, and the second time interval is an interval in which a channel different from the data channel is not set. The transmission section (for example, corresponding to a transmission circuit) performs transmission processing (for example, processing including encoding, modulation, transmission, or retransmission) of the data channel in the first time interval and the second time interval based on the decided transmission data size.

[0058] Figure 2 is a block diagram showing an example of a structure of a part of the receiving terminal 100b of the present embodiment. In Figure 2In the illustrated reception terminal 100b, for example, with respect to the first time interval (e.g., the first slot) and the second time interval (e.g., the second slot), the control section (e.g., corresponding to the control circuit) decides the transmission data size in the other time interval based on the amount of time resources (e.g., the number of symbols) used when deciding the transmission data size (e.g., TBS) for one of the time intervals. For example, the data channel (e.g., PSSCH) and the channel different from the data channel (e.g., PSFCH) can be configured in the first time interval. The data channel can be configured in the second time interval, and the second time interval can be an interval in which the channel different from the data channel is not provided. The reception section (e.g., corresponding to the reception circuit) performs reception processing (e.g., including demodulation, decoding, and combining, etc.) of the data channel in the first time interval and the second time interval based on the decided transmission data size.

[0059] [Structure of terminal]

[0060] Figure 3 is a block diagram showing a structure example of the terminal 100 of the present embodiment. In Figure 3 , the terminal 100 has a PSFCH setting section 101, a resource pool setting section 102, an SCI generation section 103, an ACK / NACK generation section 104, a TBS decision section 105, a transmission data buffer section 106, an error correction encoding section 107, a modulation section 108, a signal distribution section 109, a transmission section 110, a reception section 111, a signal separation section 112, an SCI (Sidelink Control Information) reception section 113, a demodulation section 114, an error correction decoding section 115, a TBS calculation section 116, and a reception data buffer section 117.

[0061] In addition, Figure 3 The illustrated terminal 100 is a structure in which one each of the transmission data processing system and the reception data processing system are included, and for example, in V2X, both communication with a base station (not shown) and communication between the terminals 100 are assumed, and thus two each of the transmission and reception data processing systems can be included.

[0062] Further, Figure 1 The illustrated control section can include, for example, Figure 3 The illustrated TBS decision section 105, the transmission section can include, for example, Figure 3 The illustrated transmission data buffer section 106 and the transmission section 110. Further, Figure 2 The illustrated control section can include, for example, Figure 3 The illustrated TBS calculation section 116, the reception section can include, for example, Figure 3 The illustrated reception section 111 and the reception data buffer section 117.

[0063] In Figure 3 The PSFCH setting section 101 sets, for example, resource allocation (for example, at least one of a time slot and a subchannel) of the PSFCH for feedback from the reception terminal to the transmission terminal, based on information related to PSFCH setting input from the error correction decoding section 115. The PSFCH setting section 101 outputs information related to PSFCH setting to the signal separation section 112 in the case of a transmission terminal that is data associated with the set PSFCH, and outputs information related to PSFCH setting to the signal allocation section 109 in the case of a reception terminal that is data associated with the set PSFCH, for example.

[0064] The resource pool setting section 102 sets, for example, a group of resources (for example, referred to as a resource pool) of frequency and time domain that can be used in sidelink communication. The resource pool setting section 102 sets a resource pool (for example, a time resource and a frequency resource) used by the terminal 100 on a sidelink, based on information related to the resource pool input from the error correction decoding section 115, for example. The resource pool setting section 102 outputs information related to the set resource pool to the SCI generation section 103, the signal allocation section 109, and the signal separation section 112 in the case of a transmission terminal, and outputs information related to the set resource pool to the signal separation section 112 in the case of a reception terminal, for example.

[0065] The SCI generation section 103 generates control information (for example, SCI) transmitted from a transmission terminal to a reception terminal, based on information input from the resource pool setting section 102, for example. Information related to resources of a PSSCH transmitted can be included in the SCI, for example. The SCI generation section 103 outputs the generated SCI to the signal allocation section 109 and the signal separation section 112.

[0066] The ACK / NACK generation section 104 determines whether or not a received data signal is successfully decoded, based on the received data signal input from the error correction decoding section 115. The ACK / NACK generation section 104 generates information indicating whether or not information related to success or failure of decoding of a received data signal is fed back, or information including one of ACK (decoding success) and NACK (decoding failure) (for example, also referred to as a response signal, ACK / NACK, or HARQ-ACK), based on the determination result, for example, and outputs it to the signal allocation section 109.

[0067] The TBS decision section 105 decides a TBS set to a transmission data signal (for example, a TB). For example, the TBS decision section 105 can decide a TBS based on resource allocation information of a transmission data signal or information notified from a higher layer (for example, information associated with a PSFCH, such as information including a time slot, a subchannel, or a resource pool allocated to a PSFCH). The TBS decision section 105 outputs the decided information related to a TBS to the transmission data buffer section 106.

[0068] The transmission data buffer section 106 temporarily buffers a transmission data signal. The transmission data buffer section 106 can output the buffered transmission data signal to the error correction encoding section 107, for example, at the time of retransmission or retransmission of a transmission data signal. In addition, the transmission data buffer section 106 can decide an amount of data to be buffered (also referred to as a buffer size) based on information related to a TBS input from the TBS decision section 105. The transmission data buffer section 106 can be a circular buffer, for example.

[0069] The error correction encoding section 107 inputs a transmission data signal or a higher layer signal (or also referred to as a higher layer parameter. Not shown) as an input, performs error correction encoding on the input signal, and outputs the encoded signal to the modulation section 108.

[0070] The modulation section 108 modulates a signal input from the error correction encoding section 107, and outputs the modulated signal to the signal allocation section 109.

[0071] The signal allocation section 109 allocates a PSCCH signal including an SCI, a signal of a PSSCH including a signal input from the modulation section 108, or a signal of a PSFCH including a signal input from the ACK / NACK generation section 104 to a wireless resource of a sidelink, for example, based on information input from the PSFCH setting section 101, information input from the resource pool setting section 102, and information input from the SCI generation section 103. The signal allocation section 109 outputs the signal allocated to the resource to the transmission section 110.

[0072] The transmission section 110 performs radio transmission processing such as up-conversion on a signal input from the signal allocation section 109, and transmits the transmission signal to a reception terminal via an antenna.

[0073] The reception section 111 receives a signal transmitted from a transmission terminal via an antenna, performs reception processing such as down-conversion on the received signal, and outputs the signal to the signal separation section 112.

[0074] The signal separation section 112 outputs a signal component of the PSCCH among the signals input from the reception section 111 to the SCI reception section 113 and outputs a signal component of the PSSCH to the demodulation section 114, for example, on the basis of information input from the PSFCH setting section 101, information input from the resource pool setting section 211, or information input from the SCI reception section 113.

[0075] The SCI reception section 113 reads (may also be referred to as "receives") control information transmitted from the transmitting terminal on the basis of the signal component of the PSCCH (for example, SCI) input from the signal separation section 112. The SCI reception section 113 can output, for example, resource allocation information of the PSSCH addressed to the terminal 100 included in the SCI to the signal separation section 112. In addition, the SCI reception section 113 can also output information associated with the TBS included in the SCI to the TBS calculation section 116.

[0076] The demodulation section 114 performs demodulation processing on the signal input from the signal separation section 112 and outputs the resulting demodulated signal to the error correction decoding section 115.

[0077] The error correction decoding section 115 decodes the demodulated signal input from the demodulation section 114 and outputs information associated with the PSFCH setting included in the resulting higher layer signaling to the PSFCH setting section 101 and outputs information associated with the resource pool to the resource pool setting section 102. In addition, the error correction decoding section 115 outputs the resulting received data signal to the ACK / NACK generation section 104 and the reception data buffer section 117.

[0078] The TBS calculation section 116 decides (for example, calculates) what the TBS set to the received data is on the basis of the information associated with the TBS input from the SCI reception section 113 (for example, resource allocation information of the TB or information associated with the PSFCH such as a time slot, a subchannel, or a resource pool including a resource allocated to the PSFCH). The TBS calculation section 116 outputs the calculated TBS to the reception data buffer section 117.

[0079] The reception data buffer section 117 temporarily buffers the received data signal input from the error correction decoding section 115. The reception data buffer section 117 can merge the buffered received data signal with the received data signal input from the error correction decoding section 115, for example, at the time of repeated transmission or retransmission of the transmitted data signal. In addition, the reception data buffer section 117 can also decide the amount of data to be buffered (also referred to as the buffer size) on the basis of the information associated with the TBS input from the TBS calculation section 116. The reception data buffer section 117 can be a circular buffer, for example.

[0080] Further, control information related to sidelink such as PSFCH configuration information or resource pool configuration information is not limited to being configured by high layer signaling, and can be configured in an application layer called "pre-configured", for example, and can also be pre-configured in a subscriber identity module (SIM) possessed by the terminal 100.

[0081] [Actions of terminal 100]

[0082] Next, an example of the actions of the terminal 100 (e.g., a transmitting terminal and a receiving terminal) will be described.

[0083] Figure 4 is a flowchart showing an example of the processing of the terminal 100.

[0084] The transmitting terminal decides a TBS of the transmission data (e.g., TB) (ST101). For example, the transmitting terminal can decide the TBS based on resource allocation information of the PSSCH and information associated with the PSFCH.

[0085] The transmitting terminal transmits, for example, the PSCCH including the SCI and the PSSCH including the transmission data to the receiving terminal (ST102). The transmitting terminal performs transmission of the transmission data (TB), for example, based on the decided TBS. In addition, the transmitting terminal buffers the transmission data in the transmission data buffer 106. Further, the transmitting terminal can decide a buffer size of the transmission data based on the TBS, for example. The PSCCH and the PSSCH are received by the receiving terminal.

[0086] In the receiving terminal, a decision (or calculation) is made as to how much the TBS of the data transmitted from the transmitting terminal is (ST103). For example, the receiving terminal can decide as to how much the TBS is set to the reception data based on the resource allocation information included in the SCI and the configuration information related to the PSFCH from the high layer. In addition, the receiving terminal buffers the reception data in the reception data buffer 117. Further, the receiving terminal can decide a buffer size of the reception data based on the TBS, for example.

[0087] The receiving terminal transmits, for example, the PSFCH including the ACK / NACK for the reception data to the transmitting terminal (ST104). The receiving terminal can decide a slot in which the PSFCH is transmitted based on the PSFCH configuration information, for example.

[0088] The transmitting terminal can retransmit the transmission data based on the PSFCH fed back from the receiving terminal, for example. Alternatively, the transmitting terminal can repeatedly transmit the transmission data. In the case of the repeated transmission or retransmission of the transmission data, the transmitting terminal and the receiving terminal can repeatedly perform the above-described processing, for example. Figure 4The processing of ST101 to ST104 shown.

[0089] In addition, for example, the terminal 100 can be configured with parameters related to the sidelink (for example, PSFCH configuration information and resource pool configuration information) in the following manner: it can be provisioned in advance in the standard, it can be configured in an application layer called Pre-configured, it can be provisioned in advance in the SIM, and it can be configured in a higher layer such as a SIB (System Information Block) or other RRC (Radio Resource Control) called configured.

[0090] Next, an example of a method of determining the TBS will be described.

[0091] In the present embodiment, the terminal 100 (for example, a transmitting terminal and a receiving terminal) can set a fixed value to the TBS, for example, in a plurality of time intervals (for example, a plurality of slots) in the repeated transmission or retransmission of the TB, without being affected by the allocation of the PSFCH or the variation in the amount of resources allocated to the PSFCH. In other words, for example, the TBS in each of the plurality of slots can be determined in a manner that does not take into account part or all of the variation in the allocated resources of the transmission data signal for each slot, subchannel, or resource pool. In addition, "determined in a manner that does not take into account ○○" can be expressed by "determined in a manner that is not based on ○○", "determined in a manner that is not dependent on ○○", "determined independently of ○○", and the like, which can be mutually substituted.

[0092] Next, the determination method 1 to the determination method 3 of the TBS will be described.

[0093] [Determination method 1]

[0094] The terminal 100 (for example, a transmitting terminal or a receiving terminal) determines (or calculates) the TBS set to the transmission data, for example, based on the resource allocation information of the transmission data signal (for example, PSSCH) and the information related to the PSFCH. For example, the terminal 100 can determine the TBS in a manner that does not take into account part or all of the allocation of the PSSCH, the amount of resources allocated to the PSFCH, or the configuration or notification related to the resource allocation.

[0095] For example, the terminal 100 determines the number N of symbols allocated to the data signal in the receiving terminal for determining the TBS, regardless of whether there is a symbol allocated to the PSFCH in the slot. symb sh The value is set to include the number of symbols allocated to the PSFCH. For example, the terminal 100 can determine the number N of symbols allocated to the data signal in the receiving terminal for determining the TBS, regardless of whether there is a symbol allocated to the PSFCH in the slot.symb sh The number of symbols of the PSSCH in the case where the PSSCH is set to be unassigned.

[0096] Figure 5 An example of a relationship between the amount of time-domain resources (e.g., the number of symbols) allocated to a TB (e.g., a signal of a PSSCH) in the determination method 1 and the amount of time-domain resources of the TB used for determination (or calculation) of a TBS is shown.

[0097] In the determination method 1, the terminal 100 determines the TBS based on the number of symbols of the PSSCH configured in the slot in which the PSSCH is included and the PSFCH is not included. Figure 5 In the example shown, the resources (e.g., symbols) actually allocated to the TB (PSSCH) are allocated in a manner not overlapping with the resources allocated to the PSFCH. In addition, the term “overlap” can be mutually replaced with “collision”.

[0098] For example, in the slot shown in (a) of FIG. 30-3, there is no allocation of the PSFCH, and all of the symbols up to the end of the slot are allocated with the PSSCH. Figure 5

[0099] On the other hand, in the slot shown in (b) of FIG. 30-3, there is an allocation of the PSFCH, and the PSFCH is allocated to the symbol at the end of the slot. In (b) of FIG. 30-3, the PSSCH is allocated to a symbol different from the PSFCH in the slot. Figure 5 Figure 5

[0100] In the determination method 1, the terminal 100 determines the TBS based on the number of symbols of the PSSCH configured in the slot in which the PSSCH is included and the PSFCH is not included. Figure 5 In other words, regardless of whether or not the PSFCH is allocated in the slot, the terminal 100 determines (or calculates) the TBS based on the allocation of the PSSCH shown in (a) of FIG. 30-3. Figure 5 For example, even in the slot shown in (b) of FIG. 30-3 (a case where there is an allocation of the PSFCH), the terminal 100 determines the TBS based on the allocation (e.g., the number of symbols) of the PSSCH in the slot shown in (a) of FIG. 30-3. In other words, the terminal 100 determines the TBS in the slot shown in (b) of FIG. 30-3 based on the number of symbols used for determination of the TBS in the slot shown in (a) of FIG. 30-3.

[0101] Figure 5 Figure 5 Figure 5 Figure 5

[0102] ​​​​​​​​For example, in actual allocation (e.g., PSSCH mapping) of time resources (e.g., symbols), the PSSCH is allocated to resources that do not overlap with the resources of the PSFCH, taking into account the resources allocated to the PSFCH. In contrast, in TBS determination (e.g., TBS calculation), the TBS is determined based on the resources allocated to the PSSCH within the slot as indicated in (a) without taking into account the resources (e.g., symbols) allocated to the PSFCH, regardless of the presence or absence of allocation of the PSFCH. Figure 5

[0103] In determination method 1, as indicated in (a), the terminal 100 determines the number of symbols N Figure 5 Figure 5 allocated to the data signal in a certain slot (e.g., the slot of (a)) among the multiple slots in which the repeated transmission or retransmission is performed, for the determination of the TBS. symb sh The number of symbols N Figure 6 allocated to the data signal is also used for the determination of the TBS in other slots (e.g., the slots of (b)). By thus determining, in determination method 1, as indicated in (b), the terminal 100 can determine the TBS to be the same in the multiple slots regardless of the presence or absence of the PSFCH. Figure 6

[0104] [Decision method 2]

[0105] The terminal 100 (e.g., a transmitting terminal or a receiving terminal) determines (or calculates) the TBS set to the transmitted data, for example, based on the resource allocation information of the transmitted data signal (e.g., PSSCH) and the information related to the PSFCH. For example, the terminal 100 can determine the TBS taking into account the presence or absence of allocation of the PSSCH, a part or all of the amount of resources allocated to the PSFCH, or the setting or notification related to the resource allocation.

[0106] For example, the terminal 100 sets the number of symbols N symb sh allocated to the data signal in the receiving terminal for the determination of the TBS to a value that does not include the number of symbols allocated to the PSFCH. For example, the terminal 100 can set the number of symbols N symb sh allocated to the data signal in the receiving terminal for the determination of the TBS to the number of symbols of the PSSCH in the case where the PSFCH is allocated.

[0107] Figure 6 An example of the relationship between the amount of time domain resources (e.g., the number of symbols) allocated to the TB (e.g., the signal of the PSSCH) and the amount of TB time domain resources used for the determination (or calculation) of the TBS in determination method 2 is shown.​​​

[0108] exist Figure 6 In the example shown, the resources (e.g., symbols) actually allocated to TB (PSSCH) are allocated in a manner that does not overlap with the resources allocated to PSFCH.

[0109] For example in Figure 6 In the time slot shown in (a), there is no PSFCH allocation, and PSSCH is allocated until the last symbol in the time slot.

[0110] On the other hand, Figure 6 In the time slot shown in (b), there is a PSFCH allocation, and the PSFCH is allocated to the last symbol within the time slot. Additionally, in Figure 6 In (b), the PSSCH is assigned a different symbol than the PSFCH in the time slot.

[0111] In decision method 2, terminal 100 is based on the PSSCH and PSFCH. Figure 6 The number of symbols configured for PSSCH (e.g., TB) in the time slot shown in (b) determines the TBS. In other words, regardless of whether PSFCH is allocated within the time slot, terminal 100 bases its TBS on... Figure 6 The allocation of PSSCH shown in (b) is used to determine (or calculate) TBS.

[0112] For example, even for Figure 6 In the time slot shown in (a) (without PSFCH allocation), terminal 100 is also based on Figure 6 The TBS is determined by the allocation of PSSCH (e.g., the number of symbols) in the time slot shown in (b). In other words, terminal 100 determines the TBS based on the allocation of PSSCH in the time slot. Figure 6 The number of symbols used in the time slot shown in (b) to determine the TBS is used to make the decision. Figure 6 The TBS in the time slot shown in (a).

[0113] For example, in the actual allocation of time resources (e.g., symbols) (e.g., PSSCH mapping), taking into account the resources allocated to PSFCH, PSSCH is allocated to resources that do not overlap with those of PSFCH. In contrast, in TBS decision (e.g., TBS calculation), regardless of whether PSFCH is allocated, it is based on the resources (e.g., symbols) allocated to PSFCH. Figure 6 The resources allocated to PSSCH within the time slot shown in (b) determine TBS.

[0114] In decision method 2, such as Figure 6 As shown, terminal 100 will repeatedly send or retransmit a certain time slot among multiple time slots (e.g.,Figure 6 The number of symbols N allocated to the data signal in the time slot (b) for TBS determination symb sh It is also used in other time slots (e.g., Figure 5 The determination of TBS in time slot (a). Through this determination, in determination method 2, as... Figure 5 As shown, terminal 100 can determine the same TBS in multiple time slots regardless of the presence or absence of PSFCH.

[0115] [Decision Method 3]

[0116] In decision method 3, terminal 100 (e.g., transmitting terminal or receiving terminal) determines (or calculates) the TBS set for transmitting data, for example, based on resource allocation information of the transmitted data signal (e.g., PSSCH) and information related to PSFCH.

[0117] In decision method 3, terminal 100 determines, for example, the number of symbols N allocated to the data signal for determining TBS based on settings or notifications to terminal 100. symb sh In other words, terminal 100 determines whether to consider settings related to PSFCH based on settings or notifications.

[0118] For example, if the settings related to PSFCH are set or notified not to be considered, terminal 100 can determine TBS based on the amount of allocated resources (e.g., number of symbols) of PSSCH in a time slot that includes PSSCH but not PSFCH, similar to determination method 1. On the other hand, if the settings related to PSFCH are set or notified to be considered, terminal 100 can determine TBS based on the amount of allocated resources (e.g., number of symbols) of PSSCH in a time slot that includes both PSSCH and PSFCH, similar to determination method 2.

[0119] In other words, the amount of time resources (e.g., the number of symbols N) used in the TBS decision in terminal 100 symb sh The value of the number of symbols in the configuration TB is one of the following two: a time slot including PSSCH but excluding PSFCH, and a time slot including both PSSCH and PSFCH. The fact that the time slot of the above two is either one is notified to the terminal 100 or set in the terminal 100.

[0120] By the determination method 3, the terminal 100 is able to select, for example, the determination method of the determination method 1 and the determination method 2 that is suitable for the TBS determination by the terminal 100. For example, the determination method of the TBS can be set in or notified to the terminal 100 based on the capability of the terminal 100 (e.g., UE capability or buffer size, etc.).

[0121] The determination method of the TBS is described above.

[0122] Next, an action example related to the TBS determination is described.

[0123] [Action Example 1]

[0124] In Action Example 1, the TBS determination processing is described.

[0125] [Action Example 1-1]

[0126] In Action Example 1-1, among the resource allocation information for the TB used when the TBS is determined in the transmitting terminal and the receiving terminal, the number of symbols (e.g., N symb sh ) is, for example, specified as a fixed value or a candidate group by a standard (or a specification).

[0127] For example, the number of symbols N symb sh may be specified as a fixed value in the standard or selected from the candidate group specified in the standard.

[0128] Here, in the case where the candidate group of the number of symbols N symb sh is provided, the terminal 100 can determine the selected candidate from the candidate group based on the content set by the SCI notification or by the higher layer, etc., or can determine the selected candidate according to a certain reference.

[0129] According to Action Example 1-1, for example, it is possible to reduce the signaling amount without performing the notification of the fixed value or the candidate group of the number of symbols N symb sh for determining the TBS.

[0130] [Action Example 1-2]

[0131] In Action Example 1-2, the transmitting terminal and the receiving terminal determine the TBS based on the number of symbols allocated to the TB used when the TBS is determined (or calculated) and whether the allocated symbols overlap with the allocable symbols of the PSFCH.

[0132] Hereinafter, an example in which Action Example 1-2 is applied to Decision Method 1 of TBS will be described.

[0133] (Action Example 1-2a)

[0134] An example in which Action Example 1-2 is applied to Decision Method 1 of TBS will be described.

[0135] For example, it is assumed that resources not allocated to other channels or signals different from the PSSCH are set as resources allocated to the PSSCH within a slot.

[0136] Here, the resources allocated to other channels or signals different from the PSSCH include, for example, resources allocated to the PSCCH, the PSFCH, symbols corresponding to a switching transition time from transmission to reception and from reception to transmission, or symbols corresponding to automatic gain control (AGC).

[0137] The terminal 100 (transmitting terminal or receiving terminal) can determine the number of symbols N symb sh .

[0138] For example, in a case where the PSSCH resources overlap the PSFCH resources, the terminal 100 can set the number of symbols allocated to the PSSCH as N symb sh On the other hand, in a case where the PSSCH resources do not overlap the PSFCH resources, the terminal 100 can set, as N symb sh .

[0139] In addition, for example, as in NR of Rel. 16, it is assumed that a starting symbol within a slot and an allocated symbol length of resources allocated to a data channel (for example, PDSCH or PSSCH) are notified by control information (for example, DCI or SCI).

[0140] The transmitting terminal and the receiving terminal can determine, for example, based on the notification, whether the resources allocated to the PSSCH overlap the resources allocable to the PSFCH. The value of the number of symbols N symb sh in the TBS determination differs according to the determination result of the transmitting terminal and the receiving terminal. For example, in a case where the PSSCH resources overlap the PSFCH resources, the number of symbols allocated to the PSSCH is set as the number of symbols N symb shthe value of the number of symbols allocated to the PSFCH is set to N symb sh the value of the number of symbols allocated to the PSFCH is set to N

[0141] According to Action Example 1-2a, even in a case where the same TB occurs repeatedly or is retransmitted, the terminal 100 (transmitting terminal or receiving terminal) can determine the same TBS with respect to a data signal (for example, PSSCH) associated with the repeated transmission or retransmission, regardless of whether the PSSCH resource overlaps the PSFCH resource. In addition, according to Action Example 1-2a, the terminal 100 can flexibly allocate resources to each transmission data, for example, in correspondence with the situation of the slot or subchannel.

[0142] (Action Example 1-2b)

[0143] An example of applying Action Example 1-2 to the determination method 2 of TBS will be described.

[0144] For example, it is assumed that, within a slot, a resource not allocated to another channel or signal other than PSSCH is set as a resource allocated to PSSCH.

[0145] Here, the resource allocated to another channel or signal other than PSSCH includes, for example, a resource allocated to PSCCH, PSFCH, a symbol corresponding to a switching transition time from transmission to reception and from reception to transmission, or a symbol corresponding to AGC.

[0146] The terminal 100 (transmitting terminal or receiving terminal) can determine the number of symbols N symb sh for the determination of TBS, for example, in accordance with whether the resource allocated to PSSCH overlaps the resource allocable to PSFCH.

[0147] For example, in a case where the PSSCH resource overlaps the PSFCH resource, the terminal 100 can set, as N symb sh , the value obtained by subtracting the number of symbols allocated to the PSFCH from the number of symbols allocated to the PSSCH. On the other hand, in a case where the PSSCH resource does not overlap the PSFCH resource, the terminal 100 can set, as N symb sh , the number of symbols allocated to the PSSCH.

[0148] In addition, for example, as in NR of Rel. 16, it is assumed that the starting symbol within a slot and the allocated symbol length of the resource in which a data channel (for example, PDSCH or PSSCH) is allocated are notified by control information (for example, DCI or SCI).

[0149] The sending and receiving terminals can, for example, use this notification to determine whether the resources allocated to the PSSCH overlap with the resources available for allocation to the PSFCH. The number of symbols N in the TBS decision. symb sh The value varies depending on the judgment results of the sending and receiving terminals. For example, when PSSCH resources overlap with PSFCH resources, the value obtained by subtracting the number of symbols allocated to PSFCH from the number of symbols allocated to PSSCH is set as the number of symbols N in the TBS determination. symb sh The value of . In contrast, when PSSCH resources and PSFCH resources do not overlap, the number of symbols allocated to PSSCH is set to the number of symbols N determined in TBS. symb sh The value of .

[0150] According to Operation Examples 1-2b, even in the case of repeated transmissions or retransmissions of the same TBS, regardless of whether the PSSCH resources and PSFCH resources overlap, the terminal 100 (transmitting terminal or receiving terminal) can determine the same TBS for the data signal (e.g., PSSCH) associated with the repeated transmission or retransmission. Furthermore, according to Operation Examples 1-2b, the terminal 100 can, for example, flexibly allocate resources to each transmitted data according to the conditions of the time slot or sub-channel.

[0151] [Action Example 2]

[0152] Action Example 2 explains the process following the TBS decision and the actual resource allocation decision.

[0153] The following describes an example of a method for adjusting the coding rate, for instance, after the transmitting terminal has determined the TBS and the resources allocated to the data channels (e.g., PDSCH, PUSCH, or PSSCH) actually used for the transmission of the TBS.

[0154] <Action Example 2-1>

[0155] In TBS decision method 1 or decision method 3, for example, Figure 6 As shown in (b), the number of symbols (N) identified as being allocated to the data signal when the receiving terminal determines the TBS. symb sh The number of symbols allocated to the data signal may be greater than the actual number of symbols allocated to it. In this case, the TBS set to the TB may be greater than the TBS determined based on the actual number of symbols allocated to the TB. Furthermore, for example, in... Figure 6In (b), TB may be allocated a smaller resource (e.g., PSSCH resource) than the resource equivalent to the determined TBS.

[0156] Therefore, the transmitting terminal can, for example, thin the transmitted data. This process is also known as puncture or puncturing. By thinning the transmitted data, the transmitting terminal can, for example, allocate the punctured transmitted data to a smaller resource (e.g., PSSCH resource) than the resource corresponding to the determined TBS.

[0157] Therefore, for a TB whose TBS is determined to be larger than the TBS set based on the actual number of allocated symbols, allocating that TB to resources smaller than those corresponding to the determined TBS can suppress the decrease in transmission reliability caused by the smaller allocated resources. Furthermore, by repeatedly transmitting the TB, transmission reliability can be further improved.

[0158] <Action Example 2-2>

[0159] In TBS decision method 2 or decision method 3, for example, Figure 5 As shown in (a), the number of symbols (N) identified as being allocated to the data signal when the receiving terminal determines the TBS. symb sh The number of symbols actually allocated to the data signal may be smaller than the actual number of symbols allocated to the data signal. In this case, the TBS set to the TB may be smaller than the TBS determined based on the actual number of symbols allocated to the TB. Furthermore, for example, in... Figure 6 In (a), TB may be allocated a resource larger than the resource equivalent to the determined TBS (e.g., PSSCH resource).

[0160] Therefore, the transmitting terminal can adjust the coding rate by, for example, by adding redundant bits to the transmitted data. By adjusting the coding rate, the transmitting terminal can, for example, allocate the transmitted data with added redundant bits to a resource larger than the resource equivalent to the determined TBS (e.g., PSSCH resource).

[0161] Therefore, for example, even in cases where the TBS is determined to be smaller than the TBS determined based on the actual number of symbols allocated, and the TBS is allocated to resources larger than the resources equivalent to the set TBS, the utilization efficiency of the allocated resources and the reliability of transmission can be improved.

[0162] [Action Example 3]

[0163] Action Example 3 explains the actions involved in resource reservation.

[0164] In NR V2X, for example, it is assumed that resources for a plurality of PSSCHs are reserved on a certain resource pool by a certain single SCI to avoid collision with transmissions of other terminals. This operation is also referred to as "resource reservation". In resource reservation, the plurality of PSSCHs can be used for repeated transmission or retransmission of the same TB, or for different plurality of TBs.

[0165] For example, in a case where information associated with resources for a plurality of PSSCHs is notified by a certain single SCI in resource reservation, for a TB transmitted in the plurality of PSSCHs, the above-described determination method 1 to determination method 3 of TBS can be applied in determination (or calculation) of TBS of the TB. For example, in a case where resources for a plurality of PSSCHs are reserved by a single SCI, in a case where the plurality of PSSCHs are all used for repeated transmission or retransmission of the same TB, the receiving terminal can calculate the same TBS in respective reception and decoding processes of the plurality of PSSCHs. By calculating the same TBS, it is possible to improve reliability of a decoding result by merging of decoding results based on the plurality of PSSCHs.

[0166] The operation examples are described above.

[0167] In the present embodiment, the terminal 100 (for example, a transmitting terminal and a receiving terminal) determines TBS in a time slot of the other one, for example, with respect to both a time slot in which a PSSCH and a PSFCH are configured and a time slot in which only a PSSCH is configured, based on a number of symbols used when determining a transmission size (for example, TBS) of the PSSCH of one of them. Then, the transmitting terminal performs transmission processing of the PSSCH in each time slot based on the determined TBS, and the receiving terminal performs reception processing of the PSSCH in each time slot based on the determined TBS.

[0168] By this operation, for example, even in a case where resources allocated to the PSSCH or the PSFCH in each transmission can be different at the time of repeated transmission or retransmission of a TB, it is possible to set TBS in each transmission to be the same. By setting the TBS to be the same, for example, it is possible to set a buffer size of transmission data or reception data to be the same, and it is possible to improve reliability of a transmission channel (for example, a PSSCH or a TB).

[0169] The embodiments of the present disclosure are described above.

[0170] (Other Embodiments)

[0171] In the above-described embodiments, a case where the NR V2X scenario is assumed is described as an example. However, one embodiment of the present disclosure is not limited to the NR V2X, and the same applies to the multiple transmissions (or retransmissions) of the same TB in various scenarios based on the NR such as enhanced Mobile Broadband (eMBB), URLLC, NTN, and NR-U (New Radio in Unlicensed Spectrum, NR-based access to unlicensed spectrum), for example. In this case, for example, the transmission terminal of the above-described embodiment can be replaced with a base station or a terminal, the PSCCH can be replaced with a PDCCH or a PUCCH, the PSSCH can be replaced with a PDSCH or a PUSCH, the PSFCH can be replaced with a PUCCH, the SCI can be replaced with a DCI, the resource pool can be replaced with a component carrier (CC), and the subchannel can be replaced with a bandwidth part (BWP).

[0172] In the above-described embodiments, in deciding the TBS, the presence or absence of the symbol or the variation in the number of symbols is not limited to the PSFCH, and can be other channels or signaling, other symbols or resources different from the PSFCH. For example, in the NR V2X scenario, instead of the PSFCH, it can be the PSCCH, the PSSCH, the PSBCH, a symbol corresponding to a transition time of a transmission-to-reception switch or a reception-to-transmission switch, or a symbol corresponding to the AGC.

[0173] In the above-described embodiments, in deciding the TBS, the presence or absence of the symbol or the variation in the number of symbols is not limited to the PSFCH symbol allocated to the same one of the subchannel, the slot, or the subchannel and the slot as the resource allocation of the TB corresponding to the TBS, and can also be applied to the PSFCH symbol allocated to a different subchannel or slot.

[0174] In the above-described embodiments, the channel in which the transmission size (for example, the TBS) is decided is not limited to the data channel (for example, the PSSCH, the PDSCH, or the PUSCH), and can also be another channel.

[0175] In addition, the transceiving terminal in the sidelink 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, and a terminal that performs both transmission and reception.

[0176] As an example of the configuration of the PSCCH and the PSSCH, an example in which the PSCCH is configured on the first several symbols of the PSSCH is described as shown in Figure 5 and Figure 6 However, the configuration of the PSCCH and the PSSCH is not limited to Figure 5 andFigure 6 The above-described embodiments can also be applied to a configuration in which the PSCCH and the PSSCH are time division multiplexed (TDM: Time Division Multiplexing), a configuration in which they are frequency division multiplexed (FDM: Frequency Division Multiplexing), and the like.

[0177] The format of the PSFCH is not limited to the format of one symbol configured at the end of a slot as illustrated in ​ and ​ The format of the PSFCH can also be other formats, for example, a format in which the PSFCH is configured in a symbol other than the end of a slot. In addition, for example, the PSFCH can also be configured in two or more symbols.

[0178] In addition, in the above-described embodiments, the case in which the TBS is decided for each of a plurality of slots in which the TB is repeatedly transmitted or retransmitted is described, but the present technology is not limited thereto, and the TBS decided in a certain slot can be set to a plurality of slots in which the TB is repeatedly transmitted or retransmitted. In other words, the TBS set to a plurality of slots in which the TB is repeatedly transmitted or retransmitted can not necessarily be decided for each of the plurality of slots.

[0179] The number of allocated symbols of the PSSCH can be allocated by the corresponding PSCCH, or can be set in advance when a resource pool is set.

[0180] The slots in which the TB is transmitted a plurality of times can be time-continuous slots, or time-discontinuous slots.

[0181] The unit of the time resource is not limited to a combination of a slot and a symbol, and can be a frame, a subframe, a slot, a sub-slot, a symbol, or another resource unit such as a resource element (RE).

[0182] The present disclosure can be implemented by software, hardware, or software in cooperation with hardware. Each functional block used in the description of the aforementioned embodiments can be realized by an LSI that is an integrated circuit, or a part or all of the functional blocks can be realized as integrated circuits. Each process described in the aforementioned embodiments can be controlled by one LSI or a combination of LSIs as a part or all of the functional blocks. The LSI can be configured of a dedicated circuit or a general-purpose processor or a special-purpose processor. In addition, the LSI can be a post-LSI manufactured FPGAs (Field Programmable Gate Array) or reconfigurable processors in which the connections and settings of circuit cells included in the LSI can be reconfigured. The present disclosure can be realized as digital processing or analog processing. If a technology replacing LSIs emerges as a result of advancement in technology or derivation of other technologies, the functional blocks can of course be integrated using the technology. There is also a possibility that biotechnology or the like is applied.

[0183] The present disclosure can be implemented in all kinds of apparatuses, devices, and systems (collectively referred to as "communication apparatuses") having a communication function. The communication apparatuses can include a wireless transceiver and a processing / control circuit. The wireless transceiver can include a receiving section and a transmitting section, or function as these sections. The wireless transceiver (transmitting section, receiving section) can include an RF (Radio Frequency) module and one or more antennas. The RF module can include an amplifier, an RF modulator / demodulator, or the like. Non-limiting examples of the communication apparatuses include a telephone (a mobile phone, a smartphone, or the like), a tablet, a personal computer (PC) (a laptop computer, a desktop computer, a notebook computer, or the like), a camera (a digital still camera, a digital video camera, or the like), a digital player (a digital audio / video player, or the like), a wearable device (a wearable camera, a smart watch, a tracking device, or the like), a game machine, an electronic book reader, a remote health / telemedicine (remote health / medical prescription) device, a vehicle or a transportation tool (a car, an airplane, a ship, or the like) having a communication function, and a combination of the above various apparatuses.

[0184] The communication device is not limited to a portable or movable device, and includes all kinds of devices, apparatuses, and systems that are not portable or fixed. For example, the communication device includes smart home devices (home appliances, lighting devices, smart meters or meters, control panels, and the like), vending machines, and all "things" that can exist on an IoT (Internet of Things) network.

[0185] The communication includes not only data communication through a cellular system, a wireless LAN (Local Area Network) system, a communication satellite system, and the like, but also data communication through a combination of these systems.

[0186] In addition, the communication device includes a controller or a sensor and the like that are connected or linked to a communication apparatus that performs the communication function described in the present disclosure. For example, the communication device includes a controller or a sensor that generates a control signal or a data signal used by a communication apparatus that performs the communication function of the communication device.

[0187] In addition, the communication device includes an infrastructure apparatus such as a base station, an access point, and all kinds of devices and systems that perform communication with or control the above-described various devices.

[0188] A transmission device of one embodiment of the present disclosure includes: a control circuit that decides a transmission size in one of a first time interval in which a first channel and a second channel are arranged and a second time interval in which only the first channel is arranged, on the basis of an amount of time resources used in decision of the transmission size of the first channel for the one time interval; and a transmission circuit that performs transmission processing of the first channel in the first time interval and the second time interval on the basis of the decided transmission size.

[0189] In one embodiment of the present disclosure, the amount of time resources is a number of symbols in which the first channel is arranged in the first time interval.

[0190] In one embodiment of the present disclosure, the amount of time resources is a number of symbols in which the first channel is arranged in the second time interval.

[0191] In one embodiment of the present disclosure, the amount of time resources is a number of symbols in which the first channel is arranged in one of the first time interval and the second time interval, which is notified to the transmission device or set in the transmission device.

[0192] In one embodiment of the present disclosure, the control circuit decides a buffer size of a buffer area corresponding to the first channel on the basis of the transmission size.

[0193] In one embodiment of the present disclosure, the first channel is a data channel repeatedly transmitted in the first time interval and the second time interval, or a data channel for which transmission in one of the first time interval and the second time interval is retransmitted in the other.

[0194] The reception device of one embodiment of the present disclosure includes a control circuit that decides a transmission size in one of a first time interval in which a first channel and a second channel are arranged and a second time interval in which the first channel is arranged, based on an amount of time resources used in deciding the transmission size of the first channel for the one of the time intervals, and decides a transmission size in the other of the time intervals, and a reception circuit that performs reception processing of the first channel in the first time interval and the second time interval, based on the decided transmission size.

[0195] In the transmission method of one embodiment of the present disclosure, a transmission device performs the following steps: deciding a transmission size in one of a first time interval in which a first channel and a second channel are arranged and a second time interval in which the first channel is arranged, based on an amount of time resources used in deciding the transmission size of the first channel for the one of the time intervals, and deciding a transmission size in the other of the time intervals; and performing transmission processing of the first channel in the first time interval and the second time interval, based on the decided transmission size.

[0196] In the reception method of one embodiment of the present disclosure, a reception device performs the following steps: deciding a transmission size in one of a first time interval in which a first channel and a second channel are arranged and a second time interval in which the first channel is arranged, based on an amount of time resources used in deciding the transmission size of the first channel for the one of the time intervals, and deciding a transmission size in the other of the time intervals; and performing reception processing of the first channel in the first time interval and the second time interval, based on the decided transmission size.

[0197] The disclosure of Japanese Patent Application No. 2019-149143 filed on August 15, 2019, including the specification, drawings and abstract is incorporated herein by reference in its entirety.

[0198] Industrial Applicability

[0199] One embodiment of the present disclosure is useful for a mobile communication system.

[0200] Explanation of Reference Signs

[0201] 100 terminal; 101 PSFCH setting section; 102 resource pool setting section; 103 SCI generation section; 104 ACK / NACK generation section; 105 TBS decision section; 106 transmission data buffer section; 107 error correction encoding section; 108 modulation section; 109 signal distribution section; 110 transmission section; 111 reception section; 112 signal separation section; 113 SCI reception section; 114 demodulation section; 115 error correction decoding section; 116 TBS calculation section; 117 reception data buffer section.

Claims

1. A transmitting apparatus, characterized by comprising: includes: a control circuit that decides a transmission size of a first channel in a first time interval configured with the first channel and a second channel and a second time interval configured with the first channel, based on a first number of symbols, with respect to the first time interval and the second time interval; and a transmission circuit that performs a transmission process of the first channel in the first time interval and the second time interval, based on the decided transmission size, the first channel is a physical sidelink shared channel (PSSCH), and in a first case, the first number of symbols is decided by excluding a second number of symbols of a second channel, the second number of symbols being the same in the first time interval and the second time interval.

2. The transmission device according to claim 1, wherein, in a second case, the first number of symbols is decided by not excluding a second number of symbols of a second channel, one of the first case or the second case is notified to the transmission device or is set to the transmission device.

3. The transmission device according to claim 1, wherein, the control circuit decides a buffer size of a buffer corresponding to the first channel, based on the transmission size.

4. The transmission device according to claim 1, wherein, the first channel is a data channel that is repeatedly transmitted in the first time interval and the second time interval, or is a data channel that is retransmitted in one of the first time interval and the second time interval for transmission in the other.

5. The transmission device according to claim 1, wherein, whether to decide a transmission size of the first channel in the first time interval and the second time interval, based on a first number of symbols, is notified to the transmission device.

6. The transmission device according to claim 1, wherein, in a case where the first channel is allocated to resources smaller than resources corresponding to the transmission size decided in the deciding, a part of data of the first channel is not transmitted.

7. The transmission device according to claim 1, wherein, in a case where the first channel is allocated to resources larger than resources corresponding to the transmission size decided in the deciding, a coding rate of data of the first channel is adjusted.

8. A receiving device, characterized by includes: a control circuit that decides a transmission size of a first channel in a first time interval configured with the first channel and a second channel and a second time interval configured with the first channel, based on a first number of symbols, with respect to the first time interval and the second time interval; and a reception circuit that performs a reception process of the first channel in the first time interval and the second time interval, based on the decided transmission size, the first channel is a physical sidelink shared channel (PSSCH), and in a first case, the first number of symbols is decided by excluding a second number of symbols of a second channel, the second number of symbols being the same in the first time interval and the second time interval.

9. The reception device according to claim 8, wherein, In the second case, the first number of symbols is determined by excluding the second number of symbols of the second channel, One of the first case or the second case is notified to the transmission device or is set to the transmission device.

10. The reception device according to claim 8, wherein The control circuit decides a buffer size of a buffer corresponding to the first channel based on the transmission size.

11. The reception device according to claim 8, wherein The first channel is a data channel repeatedly transmitted in the first time interval and the second time interval, or is a data channel for which transmission in one of the first time interval and the second time interval is retransmitted in the other.

12. The reception device according to claim 8, wherein Whether or not the transmission size of the first channel in the first time interval and the second time interval is decided based on the first number of symbols is notified to the transmission device.

13. The reception device according to claim 8, wherein In a case where the first channel is allocated to resources smaller than the transmission size decided in the decision, a part of data of the first channel is not transmitted.

14. The reception device according to claim 8, wherein In a case where the first channel is allocated to resources larger than the transmission size decided in the decision, a coding rate of data of the first channel is adjusted.

15. A transmission method characterized by comprising the steps of: A transmission device performs the steps of: deciding a transmission size of a first channel in a first time interval configured with the first channel and a second channel and a second time interval configured with the first channel based on a first number of symbols; and performing a transmission process of the first channel in the first time interval and the second time interval based on the decided transmission size, The first channel is a physical sidelink shared channel (PSSCH), and In a first case, a first number of symbols is determined by excluding a second number of symbols of a second channel, the second number of symbols being the same in the first time interval and the second time interval.

16. A reception method characterized by comprising the steps of: A reception device performs the steps of: deciding a transmission size of a first channel in a first time interval configured with the first channel and a second channel and a second time interval configured with the first channel based on a first number of symbols; and performing a reception process of the first channel in the first time interval and the second time interval based on the decided transmission size, The first channel is a physical sidelink shared channel (PSSCH), and In a first case, a first number of symbols is determined by excluding a second number of symbols of a second channel, the second number of symbols being the same in the first time interval and the second time interval.

17. An integrated circuit, comprising: including: determining circuitry that controls determination of a transmission size of the first channel in the first time interval and the second time interval based on a first number of symbols with respect to the first time interval configured with the first channel and the second channel and the second time interval configured with the first channel; and transmission circuitry that controls a transmission process of the first channel in the first time interval and the second time interval based on the determined transmission size, the first channel is a physical sidelink shared channel (PSSCH), and in a first case, the first number of symbols is determined by excluding a second number of symbols of the second channel, the second number of symbols being the same in the first time interval and the second time interval.

18. An integrated circuit, comprising: comprises: determining circuitry that controls determination of a transmission size of the first channel in the first time interval and the second time interval based on a first number of symbols with respect to the first time interval configured with the first channel and the second channel and the second time interval configured with the first channel; and reception circuitry that controls a reception process of the first channel in the first time interval and the second time interval based on the determined transmission size, the first channel is a physical sidelink shared channel (PSSCH), and in a first case, the first number of symbols is determined by excluding a second number of symbols of the second channel, the second number of symbols being the same in the first time interval and the second time interval.

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