Communication device, communication method, base station and integrated circuit

Abstract

Data communication can be appropriately performed in an unlicensed frequency band. A mobile station (200) includes: a receiving circuit that receives first information related to a size configured for data and second information related to a resource to which the data is allocated; and a control circuit that controls reception of data based on the first information and the second information.

Description

Technical Field

[0001] The present disclosure relates to a mobile station, a base station, a receiving method, and a transmitting method. Background Art

[0002] Research has been conducted on communication systems of so-called 5th generation mobile communication systems (5G). In the 3rd Generation Partnership Project (3GPP) as an international standardization organization, further development of the 5G communication system has been studied in two aspects: progress in LTE / LTE-Advanced systems and progress in new radio access technologies (also referred to as "new RAT" or "NR") that do not necessarily have backward compatibility with LTE / LTE-Advanced systems (for example, see Non-Patent Literature (hereinafter referred to as "NPL") 1).

[0003] In NR, as discussed in License Assisted Access (LAA) or Enhanced LAA (eLAA) of LTE (see, for example, NPL 2), in addition to bands requiring a license (licensed bands), operations in bands that do not require a license (unlicensed bands). For example, operations in unlicensed bands are also referred to as "NR-based access to unlicensed spectrum" or "NR-U".

[0004] Citation List

[0005] Non-patent literature

[0006] NPL 1

[0007] RP-181726, "Revised WID on New Radio Access Technology", NTT DOCOMO, September 2018

[0008] NPL2

[0009] RP-182878, “New WID on NR-based Access to Unlicensed Spectrum”, Qualcomm, December 2018

[0010] NPL3

[0011] 3GPP TS 37.213 V15.1.0, "Physical layer procedure for shared spectrum channel access (Release 15)", September 2018

[0012] NPL4

[0013] 3GPP TS 38.214 V15.4.0, “NR; Physical layer procedures for data (Release 15)”, December 2018

[0014] NPL 5

[0015] R1-1901939, "Initial Slot with Flexible Starting Positions for NR-U", Fujitsu, February 2019 Summary of the invention

[0016] However, there has not been sufficient research on data communication methods in unlicensed bands.

[0017] One non-limiting and exemplary embodiment of the present disclosure contributes to providing a mobile station, a base station, a receiving method, and a transmitting method, each of which can appropriately perform data communication in an unlicensed frequency band.

[0018] In one general aspect, the technical features disclosed herein are; a mobile station, comprising: a receiving circuit that receives first information related to a size configured for data and second information related to resources to which the data is assigned; and a control circuit that controls the reception of data based on the first information and the second information.

[0019] It should be noted that the general or specific embodiments may be implemented as a system, an apparatus, a method, an integrated circuit, a computer program or a storage medium, or any selectable combination of a system, an apparatus, a method, an integrated circuit, a computer program and a storage medium.

[0020] According to an exemplary embodiment of the present disclosure, data communication can be properly performed in an unlicensed band.

[0021] Additional benefits and advantages of the disclosed exemplary embodiments will become apparent from the specification and drawings. Benefits and / or advantages can be obtained individually by various embodiments and features of the specification and drawings, and in order to obtain one or more of such benefits and / or advantages, the various embodiments and features do not need to be provided in full. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a diagram showing an example of a sub-band;

[0023] Figure 2 is a diagram showing an example of downlink data dispatch;

[0024] Figure 3 is a diagram showing a configuration example of downlink data;

[0025] Figure 4 is a diagram showing another configuration example of downlink data;

[0026] Figure 5 is a diagram showing a configuration example of downlink data during execution of LBT;

[0027] Figure 6 is a diagram showing an example of sub-band allocation during execution of LBT;

[0028] Figure 7 is a block diagram showing a configuration example of part of a base station according to Embodiment 1;

[0029] Figure 8 is a block diagram showing a configuration example of a portion of a mobile station according to Embodiment 1;

[0030] Fig. 9 is a block diagram showing a configuration example of a base station according to Embodiment 1;

[0031] Fig.10 is a block diagram showing a configuration example of a mobile station according to Embodiment 1;

[0032] Fig.11 is a sequence diagram showing an example of processing of a base station and a mobile station according to Operation Example 1-1 of Embodiment 1;

[0033] Fig.12 is a diagram showing an example of control information according to operation example 1-1 of embodiment 1;

[0034] Fig.13 is a diagram showing another example of control information according to operation example 1-1 of embodiment 1;

[0035] Fig.14 is a diagram showing an example of control information according to operation example 1-2 of embodiment 1;

[0036] Fig.15 is a diagram showing another example of control information according to operation example 1-2 of embodiment 1;

[0037] Fig.16 is a sequence diagram showing an example of processing of a base station and a mobile station according to operation examples 1-3 of embodiment 1; and

[0038] Fig.17 1 is a sequence diagram showing a processing example of a base station and a mobile station according to operation examples 1 to 4 of Embodiment 1. Specific embodiments

[0039] Hereinafter, a detailed description will be given of embodiments of the present disclosure with reference to the accompanying drawings.

[0040] [Carrier Sense / Listen Before Talk (LBT)]

[0041] In an unlicensed frequency band, in order to prevent interference between radio devices, each radio device is required to perform carrier sensing before transmission of a signal to confirm that there is no signal transmitted from an adjacent radio device in the same frequency band.

[0042] In NR-U, for example, the use of carrier sensing of the so-called LBT category 4 (or type 1 UL channel access procedure) and LBT category 2 (or type 2 UL channel access procedure) is as expected in conjunction with eLAA (e.g., see NPL 3). For example, in LBT category 2, the period during which carrier sensing is performed (e.g., also called LBT duration) is fixed to 25 microseconds. In LBT category 4, the period during which carrier sensing is performed is, for example, 25 microseconds or longer, and the period can be determined randomly.

[0043] In the following, the term "LBT" is used to represent carrier sensing in NR-U.

[0044] Furthermore, in NR-U, e.g. Figure 1 As shown, a system frequency band (e.g., 80 MHz) is divided into a plurality of frequency bands (e.g., 20 MHz regions, and each region is called a "subaband" or "sub-band"), and LBT is performed in each sub-band. In this case, there may be an operation in which a signal is transmitted in a sub-band in which LBT is completed and no signal is transmitted in a sub-band in which LBT is not completed.

[0045] [Downlink data allocation (time domain)]

[0046] For example, in NR, a downlink data channel (e.g., Physical Downlink Shared Channel (PDSCH)) is used for downlink (DL) data transmission.

[0047] In Rel-15 NR, symbols (e.g., orthogonal frequency division multiplexing (OFDM) symbols) as time resources forming each PDSCH (hereinafter, also referred to as "PDSCH resources") are indicated from a base station (e.g., also referred to as "gNB") to a mobile station (e.g., also referred to as "terminal" or "user equipment" (UE)) via a downlink control channel (e.g., physical downlink control channel (PDCCH)).

[0048] For example, the symbols forming the PDSCH resources are indicated to the mobile station via "time domain resource assignment" which is one field of downlink control information (e.g., downlink control information (DCI)) transmitted via the PDCCH. Figure 2As shown, this field corresponds to the row index of the "pdsch-TimeDomainAllocationList table". Figure 2 In the present invention, each row index is associated with a value of a "start and length indicator value (SLIV)". For example, the association between the row index and the SLIV is configured in the mobile station by a higher layer. The value of the SLIV corresponds one-to-one to a combination of two values ​​of "S" indicating the position of the starting symbol of the PDSCH allocation in the time slot and "L" indicating the allocation symbol length (i.e., the number of symbols) (see, for example, NPL 4). For example, the mobile station derives the values ​​of S and L from the indication value of the SLIV. For example, based on the values ​​of "S" and "L", an indication to allocate the PDSCH from the Sth symbol to the (S+L-1)th symbol is given to the mobile station.

[0049] As an example, Figure 3 Shows Figure 2 An example of the configuration of the PDSCH in the case where the row index = 0 is indicated to the mobile station. Figure 3 As shown, the mobile station determines that the symbols forming the PDSCH are 12 symbols from symbol (S=the 2nd symbol) to symbol ((S+L-1)=the 13th symbol).

[0050] As another example, Figure 4 Shows Figure 2 An example of the configuration of the PDSCH in the case where the row index = 1 is indicated to the mobile station. Figure 4 As shown, the mobile station determines that the symbols forming the PDSCH are 7 symbols from symbol (S=7th symbol) to symbol ((S+L-1)=13th symbol).

[0051] In NR-U, the above-described method of indicating downlink data allocation in the time domain may also be applied.

[0052] [Downlink data allocation (frequency domain)]

[0053] In Rel-15 NR, for example, subcarriers forming frequency resources of each PDSCH resource are indicated to a mobile station via "frequency domain resource assignment" which is one field of DCI transmitted via PDCCH.

[0054] In NR-U, in addition to this information indicating the subcarrier, a method of indicating which subband is to be used by the mobile station has also been discussed.

[0055] For example, a description will be given in the case where the system band is formed of four sub-bands. In this case, for example, a 4-bit bitmap each indicating the availability of the corresponding sub-band may be indicated to the mobile station. For example, when a sub-band to be used by the mobile station is set to "1" and a sub-band not to be used by the mobile station is set to "0" in the 4-bit bitmap, the 4-bit bitmap may be indicated to the mobile station. As an example, in the case where a bitmap indicating "1110" is indicated from the base station to the mobile station, the mobile station may determine to use three sub-bands having sub-bands #0 to #2 each indicated as "1" in the bitmap, and not to use one sub-band having sub-band #3 indicated as "0" in the bitmap.

[0056] [Downlink data transmission processing]

[0057] The base station determines PDSCH resources (e.g., at least one of time resources and frequency resources) based on, for example, the size of a transport block (TB) including downlink data (also referred to as "TB size" or "TBS") and a combination of an applicable modulation order and a codec rate (e.g., a modulation and coding scheme (MCS)). For example, the base station indicates the determined PDSCH resources to the mobile station via DCI.

[0058] In addition, for example, the base station applies codec to the TB including the downlink data and adjusts the number of bits so that the data signal generated by the codec matches the size of the above-mentioned PDSCH resource. This process of adjusting the number of bits is also called "rate matching". The base station assigns the data signal that has been rate matched (hereinafter also referred to as "rate matching output signal") to the PDSCH resource and sends the data signal to the mobile station using DCI.

[0059] The mobile station reads the PDSCH resource from the received DCI. In addition, the mobile station derives the size of the TB received in the PDSCH (TB size) based on the size of the read PDSCH resource (for example, see NPL 4). Based on the derived TB size, the mobile station also determines how rate matching is applied to downlink data in the base station. Therefore, the mobile station can properly decode the downlink data.

[0060] A description has been given so far of the downlink data transmission process.

[0061] For example, in NR-U, this document has made an assumption that the base station performs LBT before transmission of downlink data (e.g., also called PDSCH signal). For example, the base station starts transmission of downlink data after completion of LBT (i.e., LBT is successful).

[0062] To this end, there may be a situation where the size of the PDSCH resources (hereinafter referred to as "first resources") determined by the base station based on the TB size and the size of the PDSCH resources available after the completion of the LBT, that is, the actually allocated PDSCH resources (hereinafter referred to as "second resources"), are different.

[0063] In the case where the size of the second resource (hereinafter, may be referred to as the "second resource size") is smaller than the size of the first resource (hereinafter, may be referred to as the "first resource size"), the number of bits of the rate matching output signal is greater than the number of bits transmitted using the second resource. In this regard, a method for making an adjustment has been discussed, in which the base station also deletes (i.e., punctures) some bits of the rate matching output signal so that the number of bits of the rate matching output signal matches the second resource size (e.g., see NPL5). For example, this process of adjusting the number of bits can be performed separately from the above-mentioned rate matching.

[0064] In addition, for example, in the case where the second resource size is larger than the first resource size, the number of bits of the rate matching output signal is less than the number of bits transmitted using the second resource. In this regard, a method for performing an adjustment in which the base station repeats (i.e., performs repetition) a portion of the bits of the rate matching output signal can be used so that the number of bits of the rate matching output signal matches the second resource size. For example, this process of adjusting the number of bits can be performed separately from the above-mentioned rate matching.

[0065] For example, in the case where the size (e.g., number of bits) of the rate matching output signal is consistent with the second resource size, there is a possibility that the mobile station cannot correctly estimate (or derive) the TB size of the downlink data unless an indication about the first resource is given despite the indication of the second resource. Therefore, there is a possibility that the mobile station cannot properly decode the downlink data. At the same time, for example, in the case where the size of the rate matching output signal is adjusted according to the second resource size, there is a possibility that the mobile station cannot determine the resource to which the PDSCH is actually mapped unless an indication about the second resource is given despite the indication of the first resource.

[0066] Figure 5 An example of a case where the first resource and the second resource are different from each other in the time domain is shown.

[0067] For example, Figure 5 As shown, the base station determines 12 symbols from the 2nd symbol to the 13th symbol as the first resource based on the TB size, and performs rate matching based on the determined first resource. Figure 5 As shown, the base station can perform and complete LBT before the 7th symbol, and then determine that the 7 symbols between the 7th symbol to the 13th symbol are the second resources that can be used for mapping the PDSCH.

[0068] At this time, if Figure 5 As shown, the second resource size (e.g., 7 symbols) is smaller than the first resource size (e.g., 12 symbols). Therefore, the base station deletes some bits of the rate matching output signal (e.g., 5 symbols from the 2nd symbol to the 6th symbol) to make an adjustment so that the rate matching output signal matches the second resource size. Therefore, the signal generated by the adjustment (e.g., 7 symbols from the 7th symbol to the 13th symbol) can be mapped to the second resource. For example, in order to indicate the mapping of the PDSCH in the second resource to the mobile station, the base station can indicate a DCI including information corresponding to S=7 and L=7 (e.g., such as SLIV).

[0069] In this case, information related to the second resource (e.g., S=7 and L=7) is indicated to the mobile station via DCI, however, information indicating the first resource is not indicated. Therefore, the mobile station cannot deduce the TB size and cannot determine how rate matching is applied to the downlink data signal in the base station. Therefore, there may be a situation where the mobile station cannot properly decode the downlink data.

[0070] Next, Figure 6 A case where the first resource and the second resource are different from each other in the frequency domain is shown.

[0071] like Figure 6 As shown, the base station can determine the first resources on the 0th to 3rd sub-bands based on the TB size, and perform rate matching based on the determined first resources. Figure 6 As shown, the base station performs LBT from the 0th sub-band to the 3rd sub-band and completes LBT, and then determines that the second resource can be used for mapping the PDSCH in these three sub-bands. In other words, Figure 6 The third frequency band shown in is determined to be unavailable for PDSCH mapping.

[0072] At this time, if Figure 6 As shown, the second resource size (e.g., 3 sub-bands) is smaller than the first resource size (e.g., 4 sub-bands). Therefore, the base station deletes some bits of the rate matching output signal (e.g., Figure 6 The base station may indicate to the mobile station a DCI including information indicating mapping of the PDSCH in the second resource (e.g., from the 0th to the 2nd sub-band) so that the rate matching output signal matches the second resource size. Therefore, the signal resulting from the adjustment may be mapped to the second resource. The base station may indicate to the mobile station a DCI including information indicating mapping of the PDSCH in the second resource (e.g., from the 0th to the 2nd sub-band).

[0073] In this case, information related to the second resource is indicated to the mobile station, but information related to the first resource is not indicated to the mobile station. Therefore, the mobile station cannot deduce the TB size and cannot determine how rate matching is applied to the downlink data signal in the base station. Therefore, there may be a situation where the mobile station cannot properly decode the downlink data.

[0074] As described above, in NR-U, regarding the transmission of downlink data, there may be a situation where the first resource determined based on the TB size of the data and the second resource to which the data is actually allocated after the completion of LBT are different from each other due to the influence of LBT. In other words, in NR-U, there may be a situation where the first resource configured before performing LBT and the second resource configured after performing LBT are different.

[0075] In this case, there is a possibility that the mobile station cannot appropriately perform reception processing (e.g., such as data extraction processing or data decoding processing) on ​​downlink data even though any one of the information related to the first resources and the information related to the second resources is indicated to the mobile station.

[0076] In this regard, in an exemplary embodiment of the present disclosure below, a description will be given of a method of indicating information related to the TB size (i.e., the first resource) of downlink data (hereinafter referred to as "first information") and information related to the second resource to which the downlink data is allocated (hereinafter referred to as "second information") from a base station to a mobile station. For example, the first information is information determined before performing LBT, and includes information related to the amount of resources of the downlink data before performing LBT (e.g., the amount of resources corresponding to the TB size). In addition, for example, the second information is information determined based on the result of LBT, and includes information related to the allocated resources for downlink data after performing LBT.

[0077] (Example 1)

[0078] In this embodiment, the transmission of downlink data related to the time domain of NR-U in the unlicensed band will be described. In other words, in this embodiment, the first resource is a time resource determined based on the TB size configured for the downlink data, and the second resource is a time resource allocated for the downlink data.

[0079] [Communication System Overview]

[0080] The communication system according to the present embodiment includes a base station 100 and a mobile station 200 .

[0081] Figure 7 is a block diagram showing a configuration of part of the base station 100 according to Embodiment 1. Figure 7In the illustrated base station 100, the transmitter 107 (corresponding to the transmitting circuit) transmits first information related to the size configured for the data (e.g., TB size) and second information related to the resource to which the data is allocated (e.g., the second resource). The controller 101 (corresponding to the controlling circuit) controls the transmission of the data based on the first information and the second information.

[0082] Figure 8 2 is a block diagram showing a configuration example of part of the mobile station 200 of the present embodiment. Figure 8 In the illustrated mobile station 200, the receiver 202 (corresponding to the receiving circuit) receives first information related to the size configured for the data (e.g., TB size) and second information related to the resource to which the data is allocated (e.g., the second resource). The controller 206 (corresponding to the control circuit) controls the reception of the data based on the first information and the second information.

[0083] [Base station configuration]

[0084] Fig. 9 is a block diagram showing a configuration example of the base station 100 according to the present embodiment. Fig. 9 In the embodiment, the base station 100 includes a controller 101, an encoder 102, a rate matcher 103, a modulator 104, a bit number re-adjuster 105, a signal mapper 106, a transmitter 107 and an antenna 108.

[0085] For example, the controller 101 controls the transmission of transmission data (ie, downlink data). For example, the controller 101 determines the TB size of the transmission data and outputs information indicating the determined TB size (eg, referred to as "TB size information") to the rate matcher 103. In addition, the controller 101 determines the PDSCH resource (ie, the first resource) based on the TB size. For example, the controller 101 also determines the PDSCH resource (ie, the second resource) actually available after the LBT is completed. The controller 101 generates information related to the PDSCH resource determined based on the TB size (eg, the first information) and information related to the PDSCH resource determined after the LBT is completed (eg, the second information) and includes the information in at least one of the DCI and the high-layer signal. The controller 101 outputs the high-layer signal to the encoder 102 and outputs the DCI to the signal mapper 106. In addition, the controller 101 outputs the PDSCH resource information indicating the PDSCH resource (ie, the second resource) to the bit number re-adjuster 105 and the signal mapper 106.

[0086] The encoder 102 applies error correction codec to transmission data (ie, a PDSCH signal or downlink data) and a higher layer signal input from the controller 101 , and outputs a signal resulting from the error correction codec to the rate matcher 103 .

[0087] The rate matcher 103 applies rate matching to the signal input from the encoder 102 based on the TB size information input from the controller 101 , and outputs a signal resulting from the rate matching to the modulator 104 .

[0088] The modulator 104 modulates the signal input from the rate matcher 103 and outputs the modulated signal to the bit number rescaler 105 .

[0089] The bit number rescaler 105 adjusts the bit number of the signal input from the modulator 104 based on the PDSCH resource information (i.e., information related to the second resource) input from the controller 101 so that the bit number of the signal matches the second resource size. The bit number rescaler 105 then outputs the signal resulting from the bit number adjustment to the signal mapper 106.

[0090] The signal mapper 106 maps the DCI input from the controller 101 to, for example, a PDCCH resource. In addition, the signal mapper 106 maps the signal input from the bit number rescaler 105 to a PDSCH resource (i.e., a second resource) based on the PDSCH resource information input from the controller 101. The signal mapper 106 outputs the signal mapped to the resource to the transmitter 107.

[0091] The transmitter 107 applies radio transmission processing such as frequency conversion using a carrier wave to the signal input from the signal mapper 106 , and outputs a signal resulting from the radio transmission processing to the antenna 108 .

[0092] The antenna 108 radiates a signal (ie, a downlink signal) input from the transmitter 107 to the mobile station 200 .

[0093] [Mobile Station Configuration]

[0094] Fig.10 is a block diagram showing a configuration example of the mobile station 200 according to the present embodiment. Fig.10 In the embodiment, the mobile station 200 includes an antenna 201, a receiver 202, a signal separator 203, a demodulator 204, a decoder 205 and a controller 206.

[0095] Antenna 201 receives signals from base station 100 (see, for example, Fig. 9 ) and outputs the downlink signal to the receiver 202.

[0096] The receiver 202 applies radio reception processing such as frequency conversion to the signal input from the antenna 201 , and outputs a signal resulting from the radio reception processing to the signal separator 203 .

[0097] The signal separator 203 extracts, for example, DCI mapped to the PDCCH resource from the signal input from the receiver 202, and outputs the DCI to the controller 206. In addition, the signal separator 203 extracts the DCI mapped to the PDCCH resource. Based on the PDSCH resource information indicating the PDSCH resource (i.e., the second resource) input from the controller 206, the extracted data signal is output to the demodulator 204.

[0098] The demodulator 204 demodulates the data signal input from the signal separator 203. The demodulator 204 outputs the demodulated signal to the decoder 205.

[0099] The decoder 205 decodes the signal input from the demodulator 204 based on the TB size information input from the controller 206 and acquires the received data signal and the high layer signal. The decoder 205 outputs the high layer signal to the controller 206.

[0100] The controller 206 acquires information related to the first resource and the second resource based on at least one of the DCI input from the signal separator 203 and the higher layer signal input from the decoder 205. In addition, the controller 206 outputs information related to the second resource (e.g., PDSCH resource information) to the signal separator 203. In addition, the controller 206 determines (i.e., finds out) a TB size of the received data based on the information related to the first resource and outputs TB size information indicating the TB size to the decoder 205.

[0101] [Operation Example of Base Station 100 and Mobile Station 200]

[0102] Next, the base station 100 (refer to Fig. 9 ) and mobile station 200 (refer to Fig.10 ) operation example.

[0103] Hereinafter, descriptions of operation examples 1-1 to 1-4 will be given related to "first information" related to the TB size configured for downlink data (or related to the first resource determined based on the TB size) and an indication of "second information" related to the second resource (e.g., PDSCH resource) actually allocated for the downlink data after the LBT is completed.

[0104] <Operation Example 1-1>

[0105] In operation example 1-1, the first information and the second information are indicated by a single parameter to the mobile station 200. Note that the single parameter may be indicated in one DCI (ie, one control signal) and may be indicated in one field within the DCI, for example.

[0106] Fig.11is a sequence diagram showing an example of processing of the base station 100 and the mobile station 200 according to operation example 1-1.

[0107] exist Fig.11 For example, the base station 100 determines the TB size and MCS of the data signal, and determines the first resource (for example, time resource) based on the TB size and MCS (ST101). Figure 5 In the example shown, the base station 100 determines a first resource formed of 12 symbols. In addition, the base station 100 performs error correction coding and rate matching on the data signal based on the first resource (eg, the number of symbols of the first resource).

[0108] The base station 100 performs LBT before transmitting a data signal (ST102). When the LBT is completed, the base station 100 determines a second resource (eg, a time resource) that can be used to transmit the data signal at the time when the LBT is completed (ST103). Figure 5 In the illustrated example, for example, the base station 100 determines the second resource formed of 7 symbols starting from the 7th symbol in the time slot.

[0109] exist Fig.11 In the process, the base station 100 determines whether the first resource and the second resource are different from each other (ST104). In the case where the first resource and the second resource are different from each other (ST104: Yes), the base station 100 adjusts the number of bits of the data signal (i.e., the rate matching output signal) so that the number of bits of the data signal matches the second resource size (i.e., the resource amount) (ST105). Meanwhile, in the case where the first resource and the second resource are not different from each other (ST104: No), the base station 100 performs the process of ST106 without adjusting the number of bits of the data signal.

[0110] exist Figure 5 In the example shown, the first resource (12 symbols) and the second resource (7 symbols) are different from each other. Therefore, for example, the base station 100 can delete (i.e., puncture) part of the data signal (e.g., the signal generated in ST101) to adjust the data signal to the number of bits that can be mapped to the second resource ( Figure 5 7 symbols in ).

[0111] Note that the base station 100 can not only Figure 5The number of bits of the data signal is adjusted when the second resource is smaller than the first resource (i.e., when the data signal is partially deleted), and the number of bits of the data signal may also be adjusted when the second resource is larger than the first resource. For example, when the first resource includes 7 symbols and the second resource includes 12 symbols (not shown), the base station 100 may repeat part of the bits of the data signal (i.e., by repetition) so that the data signal is properly mapped to the 12 symbols. Note that examples of the case where the second resource is larger than the first resource include a case where the base station 100 has determined the first resource by assuming an LBT period, but the LBT has been completed in a time shorter than the assumed LBT period.

[0112] exist Fig.11 In the example, the base station 100 allocates a data signal to the second resource and allocates a DCI to the PDCCH resource (ST106). Note that, for example, the first information related to the first resource and the second information related to the second resource are included in the DCI. The base station 100 sends a downlink signal including the data signal and the DCI to the mobile station 200 (ST108).

[0113] Fig.12 An example of first information and second information included in DCI according to operation example 1-1 is shown.

[0114] exist Fig.12 For example, multiple candidates of the following parameter combinations are configured: parameter "L" indicates the length of the first resource (also called "size" or "resource amount", such as the number of symbols forming the first resource); parameter "L" indicates the length of the second resource (also called "size" or "resource amount", such as the number of symbols forming the second resource); and parameter "S" indicates the starting position of the second resource (for example, the first symbol position mapping the second resource).

[0115] exist Fig.12 In , the first information indicates "L of the first resource" indicating the resource amount of the first resource. In addition, Fig.12 , the second information indicates “L of the second resource” indicating a resource amount of the second resource and also indicates “S of the second resource” indicating a location of the second resource.

[0116] In addition, Fig.12 In the example, the candidates for the combination of L for the first resource, L for the second resource, and S for the second resource are each associated with a row index (identification information). Fig.12 The association between each combination of row index and parameter is shown in . For example, Fig.12The association between each combination of the row index and the parameter shown may be indicated from the base station 100 to the mobile station 200 via a higher layer signal or DCI, and / or may be specified in the standard.

[0117] The base station 100 indicates to the mobile station 200 a DCI including a row index indicating any one of a plurality of candidates for a combination of the first information (L of the first resource) and the second information (L and S of the second resource). Fig.12 In the case where the first resource includes 12 symbols and the second resource includes 7 symbols starting from the 7th symbol of the slot, the base station 100 indicates a DCI including a row index=1 to the mobile station 200.

[0118] exist Fig.11 In the example, the mobile station 200 extracts the data signal assigned to the second resource based on the second information included in the DCI received from the base station 100 (ST108). In the case where the DCI indicates a row index = 1 (for example, L = 12 of the second resource and S = 7 of the second resource), the mobile station 200 can determine that the second resource includes 7 symbols starting from the 7th symbol in the time slot and extract the data signal corresponding to the second resource in the 7 symbols.

[0119] In addition, the mobile station 200 identifies (ie, finds out) the TB size of the data signal based on the first information included in the DCI received from the base station 100 (ST109). Fig.12 For example, in the case where the DCI indicates row index=1 (eg, L=12 of the first resource), the mobile station 200 determines that the first resource includes 12 symbols and calculates a TB size corresponding to the 12 symbols (see, for example, NPL 4).

[0120] The mobile station 200 demodulates and decodes the extracted data signal based on the calculated TB size (ST110).

[0121] An example of the data transmission and reception method in the base station 100 and the mobile station 200 according to the operation example 1-1 has been described so far.

[0122] According to operation example 1-1, even when the first resources and the second resources are different from each other, the mobile station 200 can identify the allocated resources for the data signal and the TB size configured for the data signal so that reception processing (e.g., data extraction and decoding) can be appropriately performed on the data signal.

[0123] Furthermore, according to operation example 1-1, the base station 100 may use a single parameter (e.g., Fig.12 ) indicates the first information and the second information to the mobile station 200. Therefore, the overhead for DCI can be reduced.

[0124] Note that although already Fig.12 It is described in that the L of the second resource and the S of the second resource are configured as different parameters (ie, Fig.12 ) but is not limited to this case. Fig.13 As shown, the L of the second resource and the S of the second resource can be represented by Figure 2 SLIV configuration in . Fig.13 According to the method shown in , the mobile station 200 can appropriately decode the data signal based on the information about the TB size (ie, the first resource) and the allocated resource (ie, the second resource) for the data signal. Fig.13 Because Fig.12 Compared to the small number of parameters, the overhead for high-level signaling can be reduced.

[0125] In addition, although it has been described that the L of the second resource and the S of the second resource are configured in Fig.13 , but not limited to this case. For example, L of the first resource and S of the second resource may be configured in SLIV, and L of the second resource may be configured with a separate value. Also in this case, the mobile station 200 may appropriately decode the data signal based on the information about the TB size (i.e., the first resource) and the allocated resource (i.e., the second resource) for the data signal. In addition, also in this case, due to Figure 7 The number of parameters is small compared to the others, so the overhead for high-level signaling can be reduced.

[0126] <Operation Example 1-2>

[0127] In operation example 1-1, a case where a single parameter is used to indicate the first information and the second information has been described. Meanwhile, in operation example 1-2, different parameters are used to indicate the first information and the second information, respectively. Note that the parameters indicating the first information and the second information may be indicated in different DCIs (i.e., different control signals), respectively, and may also be indicated in different fields within one DCI, respectively.

[0128] Note that the processing of the base station 100 and the mobile station 200 in Operation Example 1-2 is similar to that in Operation Example 1-1 (see, for example, Fig.11 ) and is different from the information related to the first resource and the second resource included in the DCI (ie, the DCI configuration).

[0129] For example, the first information is included in a first DCI (or may be referred to as a "first DCI field") and the second information is included in a second DCI (or may be referred to as a "second DCI field") different from the first DCI.

[0130] In addition, for example, the first DCI includes at least a parameter “L” indicating the length of the first resource (eg, the number of symbols forming the first resource).

[0131] In addition, for example, the second DCI includes at least a parameter "L" representing the length of the second resource (e.g., the number of symbols forming the second resource) and a parameter "S" indicating the starting position of the second resource (e.g., the first symbol position for mapping the second resource).

[0132] Fig.14 An example of second information included in the second DCI according to operation example 1-2 is shown.

[0133] For example, in Fig.14 In the embodiment, multiple candidates for the combination of L for the second resource and S for the second resource are configured.

[0134] In addition, Fig.14 In the example, the candidates for the combination of the second resource L and the second resource S are each associated with a row index. Fig.14 The association between the row index and each parameter combination is shown. For example, Fig.12 The association between the shown row index and the combination of each parameter may be indicated from the base station 100 to the mobile station 200 via a higher layer signal or DCI, and / or may be specified in the standard.

[0135] The base station 100 indicates each of the first DCI including the first information (e.g., L of the first resource) and the second DCI including the second information (e.g., L and S of the second resource) to the mobile station 200. As an example, in the case where the first resource includes 12 symbols and the second resource includes 7 symbols starting from the 7th symbol of the time slot, the base station 100 indicates to the mobile station 200 Fig.14 The first DCI shown in includes L=12 and the second DCI including row index=1.

[0136] According to operation example 1-2, as in operation example 1-1, even when the first resources and the second resources are different from each other, the mobile station 200 can identify the allocated resources for the data signal and the TB size configured for the data signal, so that reception processing (e.g., data extraction and decoding) can be appropriately performed on the data signal.

[0137] Furthermore, according to operation example 1-2, the base station 100 can independently indicate the first information and the second information to the mobile station 200. Therefore, the base station 100 can configure each of the first resource (ie, TB size) and the second resource more flexibly.

[0138] Note that although Fig.14It is described in that the L of the second resource and the S of the second resource are configured as different parameters (ie, Fig.14 ) in the table shown in , but is not limited to this case. For example, Fig.15 As shown, the L of the second resource and the S of the second resource can be represented by Figure 2 SLIV configuration and instructions in. Fig.15 According to the method shown in , the mobile station 200 can appropriately decode the data signal based on the information related to the TB size (ie, the first resource) and the allocated resource (ie, the second resource) for the data signal. Fig.15 Because Fig.15 Compared to the small number of parameters, the overhead for high-level signaling can be reduced.

[0139] Furthermore, although it has been described in Fig.14 The L of the first resource and the S of the second resource in the DCI are indicated by a single DCI (or a single DCI field), but are not limited to this case. For example, the L of the first resource, the L of the second resource, and the S of the second resource can be indicated in different DCIs (or DCI fields). In addition, Fig.14 or Fig.15 In this method, the base station 100 can combine the L of the first resource and the S of the second resource, and indicate the L of the first resource and the S of the second resource to the mobile station 200 via a single DCI (e.g., a single DCI including a row index), and indicate the L of the second resource to the mobile station 200 via another DCI. Also through this method, the mobile station 200 can appropriately decode the data signal based on the TB size and the information of the allocated resources.

[0140] <Operation Example 1-3>

[0141] In operation example 1-3, any one of the first information and the second information is indicated to the mobile station 200 via a higher layer signal, and the other information is indicated via DCI.

[0142] Fig.16 is a sequence diagram showing an example of processing of the base station 100 and the mobile station 200 of operation example 1-3. Fig.16 In the example 1-1 (for example, Fig.11 ) are assigned the same figure marks, and the description of the processes will not be repeated here.

[0143] exist Fig.16 In the present invention, the base station 100 may determine the second resource (ST103) before performing LBT (ST102).

[0144] The base station 100 indicates a higher layer signal including any one of first information related to a first resource and second information related to a second resource to the mobile station 200 (ST201). In addition, the base station 100 indicates DCI including the other of the first information and the second information to the mobile station 200 (ST202).

[0145] For example, in the case of indicating the first information to the mobile station 200 via a higher layer signal, the base station 100 may Fig.11 ST102 in the embodiment determines a second resource after performing LBT and indicates to the mobile station 200 a DCI including second information related to the determined second resource.

[0146] The mobile station 200 derives the first resource (or TB size) and the second resource based on the first information and the second information indicated from the base station 100 via the higher layer signal and the DCI. In addition, the mobile station 200 performs data reception processing (e.g., data extraction and decoding) based on the first resource and the second resource as in Operation Example 1-1.

[0147] According to operation example 1-3, as in operation example 1-1, even in the case where the first resources and the second resources are different from each other, the mobile station 200 can identify the allocated resources for the data signal and the TB size configured for the data signal, and thus can appropriately perform reception processing (e.g., data extraction and decoding) on ​​the data signal.

[0148] According to operation example 1-3, since any one of the first information and the second information is indicated to the mobile station 200 via a higher layer signal, overhead for DCI can be reduced.

[0149] Note that both the first information and the second information may be indicated via a higher layer signal to the mobile station 200. In this case, indication via DCI is no longer necessary, so that signaling can be reduced.

[0150] In addition, at least one of the first information and the second information may be a fixed value, for example, a fixed value shared between the base station 100 and the mobile station 200. In this case, it is indicated that any one of the first information and the second information becomes unnecessary, thereby reducing the amount of signaling.

[0151] <Operation Example 1-4>

[0152] In operation example 1-4, any one of the first information and the second information is explicitly indicated, and the other information is implicitly indicated.

[0153] Hereinafter, a description will be given of an example in which the second information is explicitly indicated and the first information is implicitly indicated. Note that the first information may be explicitly indicated and the second information may be implicitly indicated.

[0154] Fig.17 is a sequence diagram showing an example of processing of the base station 100 and the mobile station 200 of operation examples 1 to 4. Fig.17 In the example 1-1 (for example, Fig.11 ) are assigned the same figure mark, and the description of the processing will not be repeated here.

[0155] exist Fig.17 In the example, the base station 100 configures a plurality of candidates for the first resource (ST301) before performing LBT (ST102). In addition, the base station 100 may generate rate matching output signals corresponding to the candidates for the first resource, respectively.

[0156] For example, the base station 100 indicates information related to the candidate for the first resource configuration to the mobile station 200 via a higher layer signal (ST302). Note that the information related to the candidate for the first resource configuration may be indicated via another signaling (e.g., DCI) without being limited to the higher layer signal, and may be a fixed value shared between the base station 100 and the mobile station 200.

[0157] After performing LBT (ST102) and determining the second resource (ST103), the base station 100 selects a candidate corresponding to the second resource from the candidates for the first resource (ST303). For example, the base station 100 may select a candidate having a size close to that of the second resource (e.g., the closest size) from the candidates for the first resource. In addition, the base station 100 selects a rate matching output signal corresponding to the selected candidate for the first resource.

[0158] For example, the base station 100 transmits a data signal including the second information related to the second resource and (for example, a data signal corresponding to the candidate selected in ST303 ) to the mobile station 200 via DCI ( ST304 ).

[0159] As in ST303, the mobile station 200 selects a candidate of a size close to the size of the second resource indicated via the DCI from the candidates for the first resource (ST305). For example, the mobile station 200 may select a candidate closest to the size of the second resource from a plurality of candidates for the first resource. As described above, the mobile station 200 determines the first information based on the second information included in the received DCI. In other words, the first information is implicitly indicated to the mobile station 200 by the second information included in the DCI.

[0160] The mobile station 200 determines the TB size of the received data signal based on the selected candidate for the first resource (ST109), and demodulates and decodes the data signal (ST110).

[0161] According to operation example 1-4, as in operation example 1-1, even in the case where the first resources and the second resources are different from each other, the mobile station 200 can identify the allocated resources for the data signal and the TB size configured for the data signal, and thus can appropriately perform reception processing (e.g., data extraction and decoding) on ​​the data signal.

[0162] Furthermore, according to operation example 1-4, since the first information is not explicitly indicated, overhead for DCI can be reduced.

[0163] In addition, according to operation examples 1-4, for example, the candidate of the first resource (ie, TB size) is determined according to the second resource determined after the LBT is completed. Therefore, based on the result of the LBT, the TB size is determined according to the available second resource, thereby improving resource utilization efficiency.

[0164] Note that although the case where the base station 100 and the mobile station 200 select a candidate of a size closest to the second resource from a plurality of candidates for the first resource is described in operation examples 1-4, the manner in which the method selects candidates is not limited to this case. For example, the base station 100 and the mobile station 200 may select a candidate having the largest size among the candidates having a size smaller than the size of the second resource from a plurality of candidates for the first resource. Alternatively, the base station 100 and the mobile station 200 may select a candidate having the smallest size among the candidates having a size larger than the size of the second resource from a plurality of candidates for the first resource. Also through this method, the base station 100 and the mobile station 200 may configure the optimal TB size corresponding to the available second resource.

[0165] In addition, although the case of configuring multiple candidates for the first resource is described in operation examples 1-4, multiple candidates for the second resource may also be configured. For example, the base station 100 selects a candidate having a size close to the first resource from multiple candidates for the second resource. The base station 100 may indicate the first information related to the first resource to the mobile station 200. The mobile station 200 selects a candidate having a size close to the size of the first resource from the known candidates for the second resource based on the indicated first information, and identifies the data dispatch position based on the selected candidate. Also by this method, the mobile station 200 can appropriately decode the data signal based on the information about the TB size and the allocated resources.

[0166] Operation Examples 1-1 to 1-4 have been described so far.

[0167] As described above, in the present embodiment, the base station 100 indicates the first information related to the TB size configured for the data (i.e., information related to the first resource) and the second information related to the second resource determined after the LBT is completed to the mobile station 200. The mobile station 200 controls the reception of the data signal (e.g., identification of the allocated resource of the data signal, derivation of the TB size, and decoding of the data signal) based on the first information and the second information indicated from the base station 100.

[0168] Therefore, even in a case where the first resource determined based on the TB size of data and the second resource to which the data is actually allocated are different from each other, for example due to the influence of LBT, the mobile station 200 can deduce the TB size and determine how rate matching is applied to the downlink data in the base station 100.

[0169] Therefore, according to the present embodiment, the mobile station 200 can appropriately receive and decode downlink data.As has been described so far, according to the present embodiment, the base station 100 and the mobile station 200 can appropriately perform data communication in an unlicensed band such as NR-U.

[0170] (Variation of Example 1)

[0171] Note that the first information is not limited to the case in which the first information indicates the number of symbols forming the first resource in Embodiment 1. For example, the first information may indicate "the difference between the number of symbols forming the first resource and the number of symbols forming the second resource". For example, the mobile station 200 can estimate the size of the first resource (e.g., the number of symbols) and identify the TB size based on the first information including the difference and the second information including the size of the second resource. Also by this method, the mobile station 200 can appropriately decode the data based on the information about the TB size and the allocated resources. In other words, the information related to the first resource only needs to include information identifying the size of the first resource.

[0172] In addition, the first information is not limited to the case where the first information indicates the number of symbols forming the first resource in Embodiment 1. The first information may indicate, for example, a TB size configured in the mobile station 200. Also by this method, the mobile station 200 can appropriately decode data based on the information about the TB size and the allocated resources.

[0173] In addition, the second information is not limited to the case where the second information in Embodiment 1 indicates a combination of "the first symbol position of the second resource (starting position S)" and "the number of symbols forming the second resource (L)". The second information may, for example, indicate a combination of "the first symbol position of the second resource (starting position S)" and "the last symbol position of the second resource (ending position)". In other words, the second information only needs to include information identifying the size and position of the second resource.

[0174] In addition, the "last symbol position of the second resource" may be implicitly indicated to the mobile station 200, for example, via information indicating the configuration of the channel occupancy time (COT) or information indicating the slot format (e.g., a slot format indicator (SFI)). For example, the base station 100 may indicate to the mobile station 200 via the COT configuration indication or the SFI that "the last symbol of the downlink signal transmitted is the Xth symbol". The mobile station 200 may determine that the second resource ends at the Xth symbol based on the received COT configuration indication or the SFI.

[0175] Also by this method, the mobile station 200 can recognize the allocated resources and appropriately decode the data. In addition, since the information related to the second resource is indicated simultaneously with the COT configuration or the slot format, the overhead for DCI can be reduced.

[0176] In addition, although the "first symbol position of the second resource" is assumed to be a symbol number, that is, an absolute position in Embodiment 1, other representation methods may also be used. For example, the first symbol position of the second resource may be a relative position to the resource to which the DCI is mapped, that is, may be represented by an offset value. Also by this method, the mobile station 200 may determine the allocated resources and appropriately decode the data.

[0177] In addition, although the case where the first information indicates the number of symbols forming the first resource has been described in Embodiment 1, it is not limited to this case. For example, in addition to the number of symbols (ie, resource amount) as in the second information, the first information may include the first symbol position of the first resource (ie, resource position). Also by this method, the mobile station 200 can recognize the TB size and appropriately decode the data.

[0178] In addition, although the number of symbols forming a time slot is set to 14 in Embodiment 1, the number of symbols forming a time slot is not limited to 14 symbols and may be another value (eg, 12).

[0179] (Example 2)

[0180] In Embodiment 2, a description will be given of transmission of downlink data related to the frequency domain of NR-U in an unlicensed band.

[0181] The base station and the mobile station according to Embodiment 2 have a basic configuration common to the base station 100 and the mobile station 200 according to Embodiment 1, and thus the description will be made in Fig. 9 and 10 Given when incorporated herein.

[0182] Hereinafter, a description will be given about information related to the TB size configured for downlink data (or the first resource determined based on the TB size) and the second resource (eg, PDSCH resource) actually allocated to the downlink data after the second LBT is completed.

[0183] <Operation Example 2-1>

[0184] The processing of the base station 100 and the mobile station 200 according to the operation example 2-1 is similar to that of the operation example 1-1 (see, for example, Fig.11 ), but the difference is that the first resource and the second resource are frequency resources.

[0185] exist Fig.11 For example, the base station 100 determines the TB size and MCS for the data signal, and determines the first resource (e.g., frequency resource) based on the TB size and MCS (ST101). For example, the base station 100 determines here a first resource formed by 10 resource blocks (RBs) #0, #10, ... #90, which belong to each of the four sub-bands of sub-bands #0 to #3, i.e., a total of 40 RBs (e.g., 480 sub-carriers). In addition, the base station 100 applies error correction coding and rate matching, etc. to the data signal based on the first resource (e.g., the number of RBs or the number of sub-carriers of the first resource).

[0186] The base station 100 performs LBT before transmitting the data signal (ST102). When the LBT is completed, the base station 100 determines a second resource (e.g., a frequency resource) that can be used to transmit the data signal at the time when the LBT is completed (ST103). In the above example, for example, the base station 100 determines a second resource formed by 10 RBs belonging to each of the three sub-bands having sub-bands #0 to #2, RB #0, #10, ... #90, i.e., a total of 30 RBs (e.g., 360 subcarriers).

[0187] In the case where the first resource and the second resource are different from each other (ST104: Yes), the base station 100 adjusts the number of bits of the data signal (i.e., the rate matching output signal) so that the number of bits of the data signal matches the second resource size (i.e., the resource amount) (ST105). Meanwhile, in the case where the first resource and the second resource are not different from each other (ST104: No), the base station 100 performs the process of ST106 without adjusting the number of bits of the data signal.

[0188] In the above example, the first resource (40 RBs = 480 subcarriers) and the second resource (30 RBs = 360 subcarriers) are different from each other. Therefore, the base station 100 can, for example, delete (i.e., puncture) part of the data signal (e.g., the signal generated in ST101) to adjust the data signal to a number of bits that can be mapped to 360 subcarriers.

[0189] Note that the base station 100 can adjust the number of bits of the data signal not only when the second resource is smaller than the first resource (i.e., when the data signal is partially deleted), but also when the second resource is larger than the first resource. For example, when the first resource includes 360 subcarriers and the second resource includes 480 subcarriers (not shown), the base station 100 can repeat some bits of the data signal (i.e., by repetition) so that the data signal is properly mapped to the 480 subcarriers.

[0190] For example, the base station 100 assigns the data signal to the second resource and assigns the DCI to the PDCCH resource (ST106). Note that, for example, the first information related to the first resource and the second information related to the second resource are included in the DCI. The base station 100 sends a downlink signal including the data signal and the DCI to the mobile station 200 (ST108).

[0191] The mobile station 200 extracts the data signal assigned to the second resource based on the information related to the second resource included in the DCI received from the base station 100 (ST108).

[0192] In addition, the mobile station 200 identifies (i.e., finds out) a TB size for the data signal based on the information related to the first resource included in the DCI received from the base station 100 (ST109). For example, in the case where the mobile station 200 determines that the first resource includes 480 subcarriers based on the DCI, the mobile station 200 calculates a TB size corresponding to the 480 subcarriers (see, for example, NPL 4).

[0193] The mobile station 200 demodulates and decodes the extracted data signal based on the calculated TB size (ST110).

[0194] As described above, the example of the data transmission and reception method in the base station 100 and the mobile station 200 according to the operation example 2-1 has been described so far.

[0195] According to operation example 2-1, even when the first resources and the second resources are different from each other, the mobile station 200 can identify the allocated resources for the data signal and the TB size configured for the data signal and can thereby appropriately perform reception processing (e.g., data extraction and decoding) on ​​the data signal.

[0196] Note that although the case where the first information indicates the frequency band of the first resource (for example, information indicating a specific RB within the subband) has been described, it is not limited to this case. The first information indicates, for example, the number of subcarriers forming the first resource (that is, the size or resource amount of the first resource). Also by this method, the mobile station 200 can recognize the TB size and appropriately decode the data.

[0197] Alternatively, the first information indicates, for example, "the difference between the number of subcarriers forming the first resource and the number of subcarriers forming the second resource". In this case, the mobile station 200 can estimate the size of the first resource (for example, the number of subcarriers) based on the first information and the second information and recognize the TB size, for example. Also by this method, the mobile station 200 can recognize the TB size and appropriately decode the data.

[0198] <Operation Example 2-2>

[0199] In operation example 2-2, the second information is, for example, information indicating sub-bands available in the first resource (frequency resource, for example, a plurality of sub-bands).

[0200] Note that the processing of the base station 100 and the mobile station 200 according to the operation example 2-2 is similar to that of the operation example 2-1 (see, for example, Fig.11 ) is similar to the present invention, but the difference is that the information related to the second resource included in the DCI is different.

[0201] For example, in the case where it is determined by LBT that the sub-bands having sub-bands #0 to #2 in the base station 100 are available and the sub-band having sub-band #3 is not available, second information indicating information indicating that the availability of each sub-band is available (e.g., bitmap "1110") may be indicated to the mobile station 200. In addition, the base station 100 may indicate the second information and the first information (e.g., information similar to that of operation example 2-1). In other words, the base station 100 indicates the first information (the first information indicates the frequency resources determined based on the TB size configured for the downlink data) and the second information (the second information indicates at least one frequency band among the multiple frequency bands included in the frequency resources indicated by the first information).

[0202] When receiving the first information and the second information, the mobile station 200 may determine that “the second resource is a resource belonging to a sub-frequency band available in the indicated first resource.” Therefore, the mobile station 200 may extract a data signal from the second resource.

[0203] According to operation example 2-2, as in operation example 2-1, even in the case where the first resources and the second resources are different from each other, the mobile station 200 can identify the allocated resources for the data signal and the TB size configured for the data signal, and thus can appropriately perform reception processing (e.g., data extraction and decoding) on ​​the data signal.

[0204] In addition, according to operation example 2-2, the second information is not information indicating the size and location of the second resource itself, but information indicating the availability (available or unavailable) of each resource, so that the overhead used for DCI can be reduced compared with operation example 2-1.

[0205] Note that the resource unit of availability indicated in the second information is not limited to the subband, and may be other units. The resource unit for availability may be, for example, a subcarrier unit, a resource block unit, an interlace unit, an interlace cluster unit, etc. Also by this method, the mobile station 200 can appropriately decode the data based on the information about the TB size and the allocated resources.

[0206] Operation Examples 2-1 and 2-2 have been described so far.

[0207] As described above, in the present embodiment, the base station 100 indicates the first information related to the TB size configured for the data (i.e., information related to the first resource) and the second information related to the second resource determined after the LBT is completed to the mobile station 200. The mobile station 200 controls the reception of the data signal (e.g., identification of the allocated resource for the data signal, derivation of the TB size, and decoding of the data signal) based on the first information and the second information indicated from the base station 100.

[0208] Therefore, even in a case where the first resource determined based on the TB size of data and the second resource to which the data is actually allocated are different from each other, for example due to the influence of LBT, the mobile station 200 can deduce the TB size and determine how rate matching is applied to the downlink data in the base station 100.

[0209] Therefore, according to the present embodiment, the mobile station 200 can appropriately receive and decode downlink data. As has been described so far, according to the present embodiment, the base station 100 and the mobile station 200 can appropriately perform data communication in an unlicensed band such as NR-U.

[0210] (Variation of Example 2)

[0211] Note that the first information is not limited to the case where the first information indicates the number of subcarriers forming the first resource in Embodiment 2. For example, the first information may indicate a TB size. Also by this method, the mobile station 200 can also appropriately decode data based on the information about the TB size and the allocated resources.

[0212] In addition, in Embodiment 2, it is assumed that one first resource or one second resource is mapped on a plurality of sub-bands, but it is not limited to this case, and the first resource or the second resource can be independently configured in each sub-band. In addition, in this case, one TB can be transmitted and received on a plurality of sub-bands, and a plurality of TBs different between sub-bands can be transmitted and received.

[0213] Each embodiment of the present disclosure has been described so far.

[0214] (Other embodiments)

[0215] An exemplary embodiment of the present disclosure described above may be applied to any time slot. Alternatively, an exemplary embodiment of the present disclosure may be applied to a time slot immediately after LBT is completed and may not be applied to other time slots.

[0216] In addition, in the above embodiment, for the purpose of matching with the second resource, in the process of deleting or repeating a portion of the bits of the data signal corresponding to the size of the first resource, the deletion or repetition target bit sequence may be the first bit sequence and / or the last bit sequence of the data signal. In addition, the deletion or repetition target bit sequence may be in units of code blocks (CBs) or CB groups (CBGs).

[0217] In addition, in the above-mentioned embodiment, a description has been given of a case where the base station 100 adjusts the number of bits in a process different from rate matching for the purpose of matching with the second resource. However, the base station 100 may adjust the number of bits by rate matching in the process of matching with the second resource. Therefore, the configuration of the base station 100 may be simplified.

[0218] In addition, in the above-mentioned embodiment, the number of patterns of control signals indicating the first information (i.e., information related to the TB size) or the number of bits of the control signal corresponding to the first information may be greater than the number of patterns of control signals indicating the second information (i.e., information related to the second resource) or the number of bits of the control signal corresponding to the second information. Therefore, the base station 100 can configure the TB size and the first resource more flexibly. Alternatively, the number of patterns of control signals indicating the second information or the number of bits of the control signal corresponding to the second information may be greater than the number of patterns of control signals indicating the first information or the number of bits of the control signal corresponding to the first information. Therefore, the base station 100 can configure the second resource more flexibly.

[0219] In addition, in the above-mentioned embodiment, in the case where there is an interval between the completion of LBT and the transmission using the second resource, the base station 100 may transmit a reservation signal (e.g., referred to as a reservation signal or a false signal) during this interval. Therefore, it is possible to prevent adjacent radio devices from completing carrier sensing (e.g., LBT) during this interval and / or prevent radio devices from interfering with each other during this interval.

[0220] Although a downlink is assumed in the above embodiments, it may also be applied to an uplink or a sidelink (eg, device-to-device communication, vehicle-to-vehicle communication) between mobile stations.

[0221] Furthermore, in the above-described embodiments, for example, the term “higher layer signal” may be referred to as “RRC signal (RRC signaling)” or “MAC signal (MAC signaling)”.

[0222] Furthermore, the DCI in each embodiment may be mapped to a PDCCH that can be received by only one mobile station (eg, a UE-specific PDCCH) or may be mapped to a PDCCH that can be received by multiple mobile stations (eg, a group-common PDCCH).

[0223] In addition, although the case where the first information and the second information in each embodiment indicate parameters related to symbols or subcarriers (the number or position of symbols or subcarriers) has been described, it is not limited to this case. For example, the first information and the second information may indicate parameters related to another time resource other than the symbol or another frequency resource other than the subcarrier (e.g., the amount of resources or the resource position).

[0224] The present disclosure can be implemented by software, hardware or software with hardware. Each functional block used in the description of each embodiment described above can be implemented in part or in whole by LSI such as integrated circuit, and the process described in each embodiment can be controlled in part or in whole by the same LSI or a combination of LSI. LSI can be formed as a chip (chips) alone, or formed to include a chip of some or all functional blocks. LSI may include data input and output coupled to it. Depending on the difference in integration, LSI herein may be referred to as IC, system LSI, super LSI or super LSI. However, the technology for implementing integrated circuits is not limited to LSI, and can be implemented by using a dedicated circuit, a general-purpose processor or a dedicated processor. In addition, a field programmable gate array (FPGA) that can be programmed after LSI manufacturing can be used, or a reconfigurable processor in which the connection and setting of the circuit unit arranged inside the LSI can be reconfigured can be used. The present disclosure can be implemented as digital processing or analog processing. If the future integrated circuit technology replaces LSI due to the progress of semiconductor technology or other derivative technologies, the functional block can be integrated using the future integrated circuit technology. Biotechnology can also be applied.

[0225] The present disclosure may be implemented in any type of apparatus, device, and system (collectively referred to as "communication apparatus"), each of which is provided with communication functionality. Non-limiting examples of communication apparatus include phones (such as portable phones and smartphones), tablet computers, personal computers (PCs) (such as laptops, desktops, and notebooks), cameras (such as digital cameras / camcorders), digital players (such as digital audio / video players), wearable devices (such as wearable cameras, smart watches, and tracking devices), game consoles, digital book readers, telemedicine and telemedicine (remote health care, medication, prescription) equipment, vehicles or vehicles equipped with communication functionality (such as cars, airplanes, and ships), and combinations of the various apparatuses mentioned above.

[0226] Communication devices are not limited to portable or mobile devices, and therefore include any kind of non-portable or fixed devices, equipment and systems, such as smart home devices (e.g., appliances, lighting equipment, smart meters or measuring instruments, and control panels), vending machines, and the Internet of Things ("IoT" (every "thing" that can exist on a network)).

[0227] In addition to data communication via a cellular system, a wireless LAN system, a communication satellite system, or the like, the communication includes data communication via a combination of these systems.

[0228] In addition, the communication apparatus includes devices such as controllers or sensors that are connected to or linked to the communication devices that perform the communication functions described in the present disclosure. For example, the controller or sensor is included in each communication device that is configured to generate control signals and / or data signals used by the communication devices that perform the communication functions of the communication apparatus.

[0229] Furthermore, the communication device includes infrastructure equipment that communicates with the various non-limiting devices mentioned above or infrastructure equipment that controls these various non-limiting devices, such as a base station, an access point, any other kind of device, equipment, and system.

[0230] A mobile station according to an exemplary embodiment of the present disclosure includes: a reception circuit that receives first information related to a size configured for data and second information related to a resource to which the data is allocated; and a control circuit that controls reception of the data based on the first information and the second information.

[0231] In an exemplary embodiment of the present disclosure, a receiving circuit receives information indicating any one of a plurality of candidates for a combination of first information and second information.

[0232] In an exemplary embodiment of the present disclosure, a receiving circuit receives different control signals including first information and second information, respectively.

[0233] In an exemplary embodiment of the present disclosure, the receiving circuit receives a higher layer signal including any one of the first information and the second information, and receives a downlink control signal including the other one of the first information and the second information.

[0234] In an exemplary embodiment of the present disclosure, the receiving circuit receives a signal including any one of the first information and the second information, and the control circuit determines the other of the first information and the second information based on any one of the first information and the second information.

[0235] In an exemplary embodiment of the present disclosure, the first information indicates a resource amount of a time resource determined based on a size configured for data.

[0236] In an exemplary embodiment of the present disclosure, the first information indicates a difference between a resource amount of a time resource determined based on a size configured for the data and a resource amount of a time resource to which the data is allocated.

[0237] In an exemplary embodiment of the present disclosure, the first information indicates a size configured for the data.

[0238] In an exemplary embodiment of the present disclosure, the first information indicates a resource amount of a time resource determined based on a size configured for data and indicates a location of the time resource.

[0239] In an exemplary embodiment of the present disclosure, the second information indicates a resource amount of a time resource to which the data is allocated and indicates a location of the time resource.

[0240] In an exemplary embodiment of the present disclosure, the second information indicates a start position and an end position of a time resource to which the data is allocated.

[0241] In an exemplary embodiment of the present disclosure, the first information indicates a frequency resource determined based on a size configured for data.

[0242] In an exemplary embodiment of the present disclosure, the first information indicates a resource amount of a frequency resource determined based on a size configured for data.

[0243] In an exemplary embodiment of the present disclosure, the first information indicates a difference between a resource amount of a frequency resource determined based on a size configured for the data and a resource amount of a frequency resource to which the data is allocated.

[0244] In an exemplary embodiment of the present disclosure, the second information indicates a frequency resource to which the data is allocated.

[0245] In an exemplary embodiment of the present disclosure, the first information indicates a frequency resource determined based on a size configured for data, and the second information indicates at least one frequency band among a plurality of frequency bands included in the frequency resource.

[0246] In an exemplary embodiment of the present disclosure, at least one frequency band is a frequency band determined to be available among the plurality of frequency bands by carrier sensing.

[0247] In an exemplary embodiment of the present disclosure, the resource amount of the resource determined based on the size configured for the data is greater than the resource amount of the resource to which the data is assigned.

[0248] In an exemplary embodiment of the present disclosure, the resource amount of the resource determined based on the size configured for the data is smaller than the resource amount of the resource to which the data is assigned.

[0249] In an exemplary embodiment of the present disclosure, the first information is determined before performing carrier sensing.

[0250] In an exemplary embodiment of the present disclosure, the second information is determined based on a result of carrier sensing.

[0251] A base station according to an exemplary embodiment of the present disclosure includes: a transmission circuit that transmits first information related to a size configured for data and second information related to resources to which the data is allocated; and a control circuit that controls the transmission of the data based on the first information and the second information.

[0252] A reception method according to an exemplary embodiment of the present disclosure includes: receiving, by a mobile station, first information related to a size configured for data and second information related to resources to which the data is allocated; and controlling reception of the data based on the first information and the second information.

[0253] A transmission method according to an exemplary embodiment of the present disclosure includes: transmitting, by a base station, first information related to a size configured for data and second information related to resources to which the data is assigned; and controlling, by the base station, transmission of the data based on the first information and the second information.

[0254] Industrial Applicability

[0255] An exemplary embodiment of the present disclosure is useful in a mobile communication system.

[0256] Reference Mark List

[0257] 100 Base Stations

[0258] 101,206 Controller

[0259] 102 Encoder

[0260] 103 Rate Matcher

[0261] 104 Modulator

[0262] 105 Bit Resizer

[0263] 106 Signal Mapper

[0264] 107 Transmitter

[0265] 108,201 Antennas

[0266] 200 Mobile Stations

[0267] 203 Signal separator

[0268] 204 Demodulator

[0269] 205 Decoder

Claims

1. A communication device, comprising: A receiving circuit receives first information related to a first resource configured for first data, and second information related to a second resource configured for the first data, wherein the second resource partially overlaps with the first resource in the time domain, wherein the first resource and the second resource have the same subcarrier spacing, and wherein the first information and the second information are transmitted in a field of downlink control information (DCI); and The control circuit controls the reception or transmission of the first data based on the first information and the second information.

2. The communication device according to claim 1, wherein: In a case where the second resource is different from the first resource, the size of the first data is adjusted based on the second information.

3. The communication device according to claim 1, wherein: The resource amount of the first resource is smaller than the resource amount of the second resource.

4. The communication device according to claim 1, wherein: The first information indicates a first time resource, and the second information indicates a second time resource.

5. The communication device according to claim 1, wherein: The first information indicates a difference between a resource amount of the first resource and a resource amount of the second resource.

6. A communication method comprising the following steps: Receiving first information related to a first resource configured for first data, and second information related to a second resource configured for the first data, wherein the second resource partially overlaps with the first resource in the time domain, wherein the first resource and the second resource have the same subcarrier spacing, and wherein the first information and the second information are transmitted in a field of downlink control information (DCI); and Receiving or sending the first data is controlled based on the first information and the second information.

7. The communication method according to claim 6, wherein: In a case where the second resource is different from the first resource, the size of the first data is adjusted based on the second information.

8. The communication method according to claim 6, wherein: The resource amount of the first resource is smaller than the resource amount of the second resource.

9. The communication method according to claim 6, wherein: The first information indicates a first time resource, and the second information indicates a second time resource.

10. The communication method according to claim 6, wherein: The first information indicates a difference between a resource amount of the first resource and a resource amount of the second resource.

11. A base station, comprising: a transmitting circuit, transmitting first information related to a first resource configured for first data, and second information related to a second resource configured for the first data, wherein the second resource partially overlaps with the first resource in the time domain, wherein the first resource and the second resource have the same subcarrier spacing, and wherein the first information and the second information are transmitted in a field of downlink control information (DCI); and The control circuit controls the transmission of the first data based on the first information and the second information.

12. The base station according to claim 11, wherein: In a case where the second resource is different from the first resource, the size of the first data is adjusted based on the second information.

13. The base station according to claim 11, wherein: The resource amount of the first resource is smaller than the resource amount of the second resource.

14. The base station according to claim 11, wherein: The first information indicates a first time resource, and the second information indicates a second time resource.

15. The base station according to claim 11, wherein: The first information indicates a difference between a resource amount of the first resource and a resource amount of the second resource.

16. A communication method comprising the following steps: Transmitting first information related to a first resource configured for first data, and second information related to a second resource configured for the first data, wherein the second resource partially overlaps with the first resource in the time domain, wherein the first resource and the second resource have the same subcarrier spacing, and wherein the first information and the second information are transmitted in a field of downlink control information (DCI); and The transmission of the first data is controlled based on the first information and the second information.

17. The communication method according to claim 16, wherein: In a case where the second resource is different from the first resource, the size of the first data is adjusted based on the second information.

18. The communication method according to claim 16, wherein: The resource amount of the first resource is smaller than the resource amount of the second resource.

19. The communication method according to claim 16, wherein: The first information indicates a first time resource, and the second information indicates a second time resource.

20. The communication method according to claim 16, wherein: The first information indicates a difference between a resource amount of the first resource and a resource amount of the second resource.

21. An integrated circuit comprising: A receiving circuit controls reception of first information related to a first resource configured for first data, and second information related to a second resource configured for the first data, wherein the second resource partially overlaps with the first resource in a time domain, wherein the first resource and the second resource have the same subcarrier spacing, and wherein the first information and the second information are transmitted in one field of downlink control information (DCI); and The demodulation circuit controls execution of a demodulation process of the first data, the demodulation process being a demodulation process based on the first information and the second information.

22. An integrated circuit comprising: a transmitting circuit, controlling the transmission of first information related to a first resource configured for first data, and second information related to a second resource configured for the first data, wherein the second resource partially overlaps with the first resource in the time domain, wherein the first resource and the second resource have the same subcarrier spacing, and wherein the first information and the second information are transmitted in one field of downlink control information (DCI); and The modulation circuit controls execution of a modulation process of the first data, the modulation process being a modulation process based on the first information and the second information.

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