Base station, communication method and integrated circuit

Abstract

To send or receive a signal properly in an operation in an unlicensed band.SOLUTION: A terminal (200) includes: a mapping unit (207) for allocating a group in a plurality of groups formed by grouping a plurality of blocks formed by dividing a frequency band and allocating a signal to a resource on the basis of control information showing allocation of resources in the blocks; and a sending unit (209) for sending a signal.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to a communication device, a communication method, and an integrated circuit. [Background technology]

[0002] In the standardization of 5G, new radio access technology (NR: New Radio access technology) that is not necessarily backward compatible with LTE / LTE-Advanced is being discussed at 3GPP.

[0003] In NR, in addition to licensed bands that require licenses, operation in unlicensed bands that do not require licenses is being considered, similar to LTE-LAA (License-Assisted Access) (see, for example, Non-Patent Document 1). Operation in unlicensed bands is called, for example, NR-U (NR-based Access to Unlicensed Spectrum). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TR 38.889 V16.0.0 (2018-12), “Study on NR-based access to unlicensed spectrum(Release 16)” [Non-Patent Document 2] 3GPP TS 36.213 V14.5.0 (2017-12), "E-UTRA Physical layer procedures (Release 14)" Summary of the Invention [Problem to be solved by the invention]

[0005] However, the method of transmitting and receiving signals when operating in unlicensed bands has not been fully considered.

[0006] Non-limiting embodiments of the present disclosure contribute to providing a communication device, a communication method, and an integrated circuit that can appropriately transmit and receive signals when operating in an unlicensed band. [Means for solving the problem]

[0007] A transmitting device according to one embodiment of the present disclosure includes a circuit for allocating signals to resources based on control information indicating group allocation among a plurality of groups into which a frequency band is divided, and resource allocation within the blocks, and a transmitter for transmitting the signals.

[0008] These comprehensive or specific aspects may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a recording medium, or may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium. Effect of the Invention

[0009] According to one embodiment of the present disclosure, signals can be appropriately transmitted and received when operating in an unlicensed band.

[0010] Further advantages and benefits of an embodiment of the present disclosure will become apparent from the specification and drawings. Such advantages and / or benefits may be provided by some of the embodiments and features described in the specification and drawings, respectively, but not necessarily all of them may be provided to obtain one or more identical features. [Brief description of the drawings]

[0011] [Figure 1] An example of PRB-based block interlace design [Diagram 2]A diagram showing an example of the relationship between the number of interlaces and the number of PRBs per interlace. [Diagram 3] An example of PRB-based block interlace design [Figure 4] Block diagram showing a part of the configuration of a base station [Diagram 5] Block diagram showing part of the terminal configuration [Figure 6] Block diagram showing the configuration of a base station [Figure 7] Block diagram showing the configuration of the terminal [Figure 8] A sequence diagram showing an example of the operation of a base station and a terminal. [Figure 9] Diagram showing an example of frequency resource allocation [Figure 10] A diagram showing an example of cluster group configuration [Figure 11] A diagram showing an example of cluster group configuration [Figure 12] A diagram showing an example of cluster group configuration [Figure 13] Example of interlace RA configuration [Figure 14] Example of interlace RA configuration [Figure 15] Example of interlace RA configuration [Figure 16] Example of interlace RA configuration [Figure 17] FIG. 1 is a diagram showing an example of the relationship between the number of interlaces and the number of signaling bits. [Figure 18] A diagram showing an example of the relationship between subcarrier spacing and an interlace allocation method. [Figure 19] A diagram showing an example of interlace allocation using virtual interlace numbers. [Figure 20] A diagram showing an example of interlace allocation using virtual interlace numbers. [Figure 21]A diagram showing an example of cluster group allocation using virtual cluster group numbers [Figure 22] A diagram showing an example of the relationship between the number of cluster groups and the cluster group allocation method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0013] In unlicensed bands, the upper limit of power spectral density (PSD) is restricted by laws, regulations, standards, etc. For example, according to ETSI (European Telecommunications Standards Institute), the upper limit of PSD in the 5 GHz band is restricted to, for example, 10 dBm / MHz (17 dBm / Hz in some bands) even for terminals (also called mobile stations or UE (User Equipment)) with power control functions.

[0014] In order to transmit a signal using higher transmission power under the PSD limitation, it is effective to allocate resources by spreading them in the frequency domain. Therefore, the application of PRB-based block interlace design (also called B-IFDMA (block-interleaved frequency division multiple access)) has been considered as a frequency resource allocation method (see, for example, Non-Patent Document 1).

[0015] Figure 1 shows an example of PRB-based block interlace design.

[0016] PRB-based block interlace design is used as a frequency resource allocation method for PUSCH (Physical Uplink Shared Channel), which is an uplink data channel in LTE-LAA. PRB-based block interlace design is a method of transmitting signals using bands (in other words, resources) called interlaces that are distributed at certain intervals in the frequency domain within the system band in order to comply with the OCB (Occupied Channel Bandwidth) restrictions in unlicensed bands defined by ETSI and to mitigate the effects of PSD restrictions.

[0017] An interlace is, for example, composed of a group of consecutive subcarriers (for example, one PRB (Physical Resource Block)). For example, a band (hereinafter referred to as a cluster or a cluster block) obtained by dividing a system band or a partial band (BWP: Bandwidth part) of the system band into a plurality of blocks contains a plurality of interlaces. A number is assigned to the interlaces contained in each cluster (hereinafter referred to as an "interlace number").

[0018] Note that the cluster has the same meaning as the "interval" in which interlaces with the same interlace number are arranged. In other words, interlaces with the same interlace number are uniformly distributed in the frequency domain across multiple clusters.

[0019] The frequency resource allocation method for PUSCH in LTE-LAA (also called uplink resource allocation type 3, for example) uses a PRB-based block interlace design with 10 interlace numbers (hereinafter, represented by "M") and 10 PRBs per interlace (hereinafter, represented by "N"; in other words, the number of clusters), as shown in Fig. 1. The system bandwidth of LTE-LAA is a maximum of 20 MHz (100 PRBs), and the subcarrier spacing (SCS) is fixed at 15 kHz.

[0020] The frequency resource allocation of the PUSCH to the terminal is determined, for example, by a base station (also referred to as a Base Station, Node B, or gNB). The base station, for example, includes the determined frequency resource allocation information (also referred to as a Resource allocation field) in downlink control information (for example, DCI: Downlink Control Information) and notifies the terminal.

[0021] Here, the frequency resource allocation information may be, for example, the start position of the interlace number in the cluster (for example, the start PRB:RB START The method is composed of a resource indication value (RIV), which is control information uniquely associated with a combination of a start position of a resource and a continuous allocation length from the start position (in other words, the number of PRBs, for example, L). Hereinafter, the method of indicating a frequency resource by a combination of a start position of a resource and a continuous resource length to be used from the start position is referred to as the "RIV-based allocation method."

[0022] In LTE-LAA, M=10, so RB START There are 55 combinations of and L. Therefore, the amount of information in the frequency resource allocation information (RIV) is 6 bits. In addition, the interlace allocation in a cluster notified by the RIV is applied to all clusters in the system band.

[0023] On the other hand, in NR-U, for example, values ​​shown in FIG. 2 are being considered for the number of interlaces (M) and the number of PRBs per interlace (N) (see, for example, Non-Patent Document 1).

[0024] For example, in NR-U, support for multiple SCSs and a different number of interlaces (M) depending on the SCS are being considered, as shown in Figure 2.

[0025] In addition, in NR-U, support for multiple system bands (BWPs) with different bandwidths is being considered. Figure 3 shows a configuration example in which the system band is 20 MHz = 106 PRBs, SCS = 15 kHz, M = 10, and N = 10 or 11. In Figure 3, interlaces in a cluster are assigned interlace numbers, such as interlace #0, 1, ..., 9.

[0026] As shown in Fig. 3, depending on the system bandwidth, a cluster located at the edge of the system band (cluster #10 in Fig. 3) may have a different bandwidth from other clusters. For example, in Fig. 3, the bandwidth of cluster #0 to #9 is 10 PRBs, while the bandwidth of cluster #10 is 6 PRBs (interlace #0 to #5). Therefore, in the case of Fig. 3, interlace #0 to #5 has N=11, and interlace #6 to #9 has N=10.

[0027] In addition, NR-U is considering supporting a system bandwidth of 20 MHz or more and using a single DCI to indicate frequency resource allocation for the entire system band.

[0028] Therefore, compared to the frequency resource allocation method for LTE-LAA, the frequency resource allocation method for NR-U needs to take into account a system bandwidth of 20 MHz or more.

[0029] In addition, in NR-U, the system bandwidth (or BWP) may differ for each terminal. For this reason, it is required to be able to flexibly perform frequency multiplexing between terminals with different system bandwidths.

[0030] In addition, in NR-U, in order to support multiple SCSs, it is necessary to study frequency resource allocation methods appropriate for each SCS, and also the case where a RIV-based frequency resource allocation method is used.

[0031] Therefore, the following describes a method for transmitting and receiving uplink signals in NR-U.

[0032] [Communication system overview] A communication system according to an embodiment of the present disclosure includes a base station 100 and a terminal 200. In the following description, as an example, the base station 100 (corresponding to a receiving device) determines frequency resources to be assigned to the terminal 200 and notifies the terminal 200 of information indicating the determined resources. Then, the terminal 200 (corresponding to a transmitting device) performs a signal transmission process including mapping to resources based on the notified information, and transmits the signal to the base station 100.

[0033] Fig. 4 is a block diagram showing a configuration example of a part of a base station 100 according to an embodiment of the present disclosure. In the base station 100 shown in Fig. 4, a scheduling unit 101 determines group allocation (e.g., cluster RA) in a plurality of groups (e.g., cluster groups) obtained by grouping a plurality of blocks (e.g., clusters) obtained by dividing a frequency band, and allocation (e.g., interlace RA) of resources (e.g., interlace) in the blocks. Furthermore, a receiving unit 106 receives a signal based on the group allocation and resource allocation.

[0034] Fig. 5 is a block diagram showing a configuration example of a part of terminal 200 according to an embodiment of the present disclosure. In terminal 200 shown in Fig. 5, mapping unit 207 allocates signals to resources based on control information indicating group allocation (e.g., cluster RA) in multiple groups (e.g., cluster groups) obtained by grouping multiple blocks (e.g., clusters) obtained by dividing a frequency band, and resource allocation (e.g., interlace RA) within the block. Furthermore, transmission unit 209 transmits the signal.

[0035] [Base station configuration] FIG. 6 is a block diagram showing a configuration of base station 100 according to the present embodiment.

[0036] In FIG. 6 , base station 100 includes a scheduling unit 101, a holding unit 102, a modulation unit 103, a transmission unit 104, an antenna 105, a reception unit 106, an FFT (Fast Fourier Transform) unit 107, a demapping unit 108, an IDFT (Inverse Discrete Fourier Transform) unit 109, and a demodulation / decoding unit 110.

[0037] The scheduling unit 101 determines radio resource allocation (for example, frequency resource allocation, time resource allocation, or transmission power control information) of an uplink data channel (PUSCH) for the terminal 200 connected to the base station 100. The scheduling unit 101 outputs the determined radio resource allocation information to the retaining unit 102 and the modulating unit 103.

[0038] Here, the frequency resource allocation is determined, for example, according to a rule described later, by frequency resource allocation of an interlace in a cluster (hereinafter referred to as interlace resource allocation (interlace RA)) and frequency resource allocation of a cluster group (hereinafter referred to as cluster resource allocation (cluster RA)). In other words, the frequency resource allocation information notified to terminal 200 is configured by two types of frequency resource allocation information, interlace RA information and cluster RA information.

[0039] Note that a "cluster group" refers to, for example, a band that includes one or multiple consecutive clusters in the frequency domain.

[0040] Furthermore, the bandwidth or SCS of the BWP of terminal 200 may be notified in advance from base station 100 to terminal 200 by, for example, higher layer signaling (also called RRC signaling (Radio Resource Control signaling)). Furthermore, part of the information on frequency resource allocation may be transmitted by the higher layer signaling.

[0041] For example, the interlace RA information may be transmitted by DCI, and the cluster RA information may be transmitted by higher layer signaling. This allows the scheduling unit 101 to dynamically control the interlace allocation within the cluster, for example, according to the communication quality. On the other hand, since the fluctuation of the average communication quality between cluster groups is relatively small, the static control using the higher layer signal for the cluster RA has a small effect on the performance, while the signaling overhead can be reduced.

[0042] The holding unit 102 holds frequency resource allocation information (e.g., including interlace RA information and cluster RA information) input from the scheduling unit 101 in order to receive a signal transmitted from the terminal 200 to which the frequency resource is allocated, and outputs the information to the demapping unit 108 when receiving a signal from a desired terminal 200.

[0043] The modulation section 103 generates DCI based on the radio resource allocation information inputted from the scheduling section 101 , modulates the generated DCI, and outputs the modulated DCI to the transmission section 104 .

[0044] The transmitting section 104 performs transmission processing such as D / A conversion, up-conversion, and amplification on the signal input from the modulating section 103 , and transmits the signal after the transmission processing from the antenna 105 .

[0045] Receiving section 106 receives a signal transmitted from terminal 200 via antenna 105, performs reception processing such as down-conversion and A / D conversion on the received signal, and outputs the processed received signal to FFT section 107.

[0046] FFT section 107 removes a CP (Cyclic Prefix) portion from the received signal input from receiving section 106, performs FFT processing to convert the signal into a frequency domain signal, and outputs the frequency domain signal to demapping section 108.

[0047] The demapping unit 108 extracts a signal corresponding to the frequency resource allocated to the desired terminal 200 from the frequency domain signal input from the FFT unit 107, based on the interlace RA information and cluster RA information for the desired terminal 200 input from the holding unit 102. The demapping unit 108 outputs the extracted signal to the IDFT unit 109.

[0048] IDFT section 109 performs IDFT processing on the signal input from demapping section 108, and outputs the signal to demodulation and decoding section 110. IDFT section 109 (IDFT processing) is required when terminal 200 transmits a DFT-S-OFDM (Discrete Fourier Transform-spread Orthogonal Frequency Division Multiplexing) signal. When terminal 200 transmits an OFDM signal, IDFT section 109 (IDFT processing) is not required. Here, the transmission method (DFT-S-OFDM or OFDM) of terminal 200 may be determined in advance by base station 100 based on the communication status of terminal 200 (for example, transmission power head room, etc.) and notified to terminal 200 by an upper layer signal, etc.

[0049] Demodulation / decoding section 110 performs demodulation processing and decoding processing on the signal inputted from IDFT section 109, and outputs received data.

[0050] [Device configuration] FIG. 7 is a block diagram showing a configuration of terminal 200 according to this embodiment.

[0051] 7, terminal 200 includes antenna 201, receiving section 202, demodulating section 203, frequency resource allocation calculating section 204, coding and modulating section 205, DFT section 206, mapping section 207, IFFT section 208 and transmitting section 209.

[0052] The receiving unit 202 receives a signal transmitted from the base station 100 via the antenna 201, performs receiving processing such as down-conversion and A / D conversion on the received signal, and outputs the received signal after receiving processing to the demodulating unit 203.

[0053] The demodulation unit 203 demodulates the received signal input from the reception unit 202 , and outputs the demodulated DCI to the frequency resource allocation calculation unit 204 .

[0054] The frequency resource allocation calculation unit 204 calculates frequency resource allocation information (for example, interlace RA information and cluster RA information) based on the DCI inputted from the demodulation unit 203 , and outputs the frequency resource allocation information to the mapping unit 207 .

[0055] The coding and modulation unit 205 codes and modulates the transmission data (in other words, uplink data), and outputs the modulated data signal to the DFT unit 206 .

[0056] DFT section 206 performs DFT processing on the data signal inputted from encoding / modulating section 205, and outputs the signal after DFT processing to mapping section 207. DFT section 206 (DFT processing) is required when terminal 200 transmits a DFT-S-OFDM signal. When terminal 200 transmits an OFDM signal, DFT section 206 (DFT processing) is not required.

[0057] The mapping unit 207 maps (in other words, allocates) the data signal input from the DFT unit 206 to a frequency resource based on the frequency resource allocation information input from the frequency resource allocation calculation unit 204. For example, the mapping unit 207 maps the data signal to a frequency resource of a specified interlace number in a cluster included in a specified cluster group. The mapping unit 207 outputs the mapped data signal to the IFFT unit 208.

[0058] IFFT section 208 performs IFFT processing on the signal inputted from mapping section 207 and outputs the signal with a CP to transmitting section 209 .

[0059] The transmitting section 209 performs transmission processing such as D / A conversion, up-conversion, and amplification on the signal input from the IFFT section 208 , and transmits the signal after the transmission processing from the antenna 201 .

[0060] [Example of Operation of Base Station 100 and Terminal 200] An example of the operation of base station 100 and terminal 200 having the above configuration will be described.

[0061] FIG. 8 is a sequence diagram showing an example of the operation of base station 100 (FIG. 6) and terminal 200 (FIG. 7).

[0062] In FIG. 8, base station 100 performs scheduling for terminal 200 (ST101).

[0063] Base station 100 transmits, for example, radio resource allocation information indicating a scheduling result for terminal 200 to terminal 200 (ST102). The radio resource allocation information includes, for example, frequency resource allocation information including interlace RA information and cluster RA information. Note that, as described above, each of the interlace RA information and cluster RA information may be notified from base station 100 to terminal 200 by higher layer signaling or DCI. Terminal 200 acquires the frequency resource allocation information notified from base station 100 (ST103).

[0064] Terminal 200 maps data (for example, a PUSCH signal) to resources based on the acquired frequency resource allocation information (ST104). Terminal 200 transmits the data mapped to the resources to base station 100 (ST105).

[0065] Base station 100 extracts data transmitted from terminal 200 based on the frequency resources allocated to terminal 200 (ST106).

[0066] [Frequency resource allocation method] Next, an example of a frequency resource allocation method in scheduling section 101 will be described.

[0067] FIG. 9 shows an example of frequency resource allocation to which the PRB-based block interlace design according to this embodiment is applied.

[0068] The frequency resource allocation according to this embodiment is performed by combining interlace frequency resource allocation in a cluster (interlace RA) and frequency resource allocation in a cluster group in the system band or BWP (cluster RA).

[0069] Here, a "cluster group" refers to a band including one or a series of clusters in the frequency domain. In other words, a cluster group is formed by grouping a plurality of clusters obtained by dividing a frequency band such as a system band or a BWP.

[0070] Moreover, “interlace RA” indicates interlace resources allocated within a cluster. In other words, interlace RA indicates resource allocation of an interlace within a cluster for terminal 200.

[0071] Moreover, "cluster RA" indicates resources of a cluster group allocated within the BWP (or the system band). In other words, cluster RA indicates allocation of a cluster group among a plurality of cluster groups to terminal 200.

[0072] In addition, in Fig. 9, as an example, RIV-based allocation (combination of start resource position and consecutively used resource length) is shown for both interlace RA and cluster RA, but the allocation method is not limited to this. For example, for interlace RA or cluster RA, a method of notifying information on whether to allocate for each resource unit (PRB unit or cluster group unit) (in other words, whether each interlace in a cluster is allocated or not) (hereinafter referred to as bitmap-based allocation) may be applied.

[0073] For example, in FIG. 9, the cluster RA sends the following to the terminal 200:START = 2 and L cluster = 2 is set. Thus, the terminal 200 determines that two cluster groups, i.e., cluster group #2 and #3, are assigned among cluster groups #0 to #X in the BWP (also referred to as UL BWP for example).

[0074] Also, for example, in FIG. 9, for the terminal 200, in the interlace RA, RB START = 4 and L = 3 are set. Thus, the terminal 200 determines that three interlaces, i.e., interlace #4 to #6, are assigned.

[0075] Thus, in FIG. 9, the terminal 200 determines that interlaces #4 to #6 within cluster group #2 and #3 are assigned.

[0076] In this way, in the present embodiment, in addition to the interlace RA, the cluster RA is notified. Thereby, for example, even when different system bandwidths (or BWPs) are set for the terminals 200 respectively, different cluster groups (in other words, different clusters) can be assigned to each terminal 200. Therefore, according to the present embodiment, for example, frequency multiplexing can be flexibly performed among terminals 200 with different system bandwidths or BWPs.

[0077] [Example of cluster group setting] Next, an example of cluster group setting will be described.

[0078] <Example 1 of cluster group setting> The cluster group is set in the LBT (Listen Before Talk) subband (also referred to as the LBT unit), for example, as shown in FIG. 10. The LBT subband is the band in which the terminal 200 and the base station 100 perform carrier sensing. The bandwidth of the LBT subband (including the guard band) is, for example, 20 MHz.

[0079] In the example shown in FIG. 10, the BWP is 40 MHz (216 PRBs), and a cluster group is configured for each LBT subband (108 PRBs). For example, in FIG. 10, BWP = 40 MHz (216 PRBs) is divided into cluster groups of 108 PRBs each.

[0080] Thereby, the base station 100 can control frequency resource allocation in units of cluster groups according to the interference situation for each LBT subband of the terminal 200. Thus, for example, even in a system bandwidth (or BWP) of 20 MHz or more, the base station 100 can appropriately perform frequency scheduling for the terminal 200.

[0081] Note that, as shown in FIG. 10, the bandwidths of the clusters located at both ends within the cluster group (8 PRBs, 2 PRBs, or 6 PRBs in FIG. 10) may be different from the bandwidths of the other clusters (10 PRBs in FIG. 10).

[0082] <Example 2 of cluster group setting> The cluster group may be set, for example, as shown in FIG. 11, by dividing the LBT subband (for example, 20 MHz, 106 PRBs) into clusters so that the number of clusters within the cluster group is approximately the same.

[0083] In the example shown in FIG. 11, the BWP is 20 MHz (106 PRBs) and is divided into two cluster groups. The first half (in other words, the lower frequency side) of the cluster group shown in FIG. 11 is composed of 50 PRBs of five clusters #0 to #4. The second half (in other words, the higher frequency side) of the cluster group is composed of 56 PRBs of six clusters #5 to #10.

[0084] As a result, the base station 100 can increase the number of terminals 200 that are frequency multiplexed within the LBT subband.

[0085] <Example 3 of cluster group setting> A cluster group is composed of the minimum number of clusters having a bandwidth equal to or greater than the specified minimum bandwidth of the cluster group. For example, as shown in FIG. 12, each cluster group is composed of two clusters, which is the minimum number having a bandwidth of 2 MHz or more.

[0086] Here, 2 MHz indicates the minimum bandwidth in the regulation of temporarily operation of the OCB regulation defined by ETSI (in the same COT, if some signals satisfy 80 - 100% of the OCB regulation, some signals only need to be 2 MHz or more). Therefore, in the example shown in FIG. 12, each cluster group is composed of two clusters with a minimum bandwidth of 2 MHz or more. Note that the minimum bandwidth is not limited to 2 MHz and may be other bandwidths.

[0087] As a result, while satisfying the OCB regulation, the base station 100 can perform frequency scheduling for each terminal with finer granularity.

[0088] The above is the description of the example of cluster group setting.

[0089] Here, let us consider a case where interlace RA is notified for each cluster group (for example, for each LBT subband) instead of cluster RA. For example, when BWP is 80 MHz, four interlace RAs are notified to terminal 200 for each LBT subband (20 MHz). The number of signaling bits for each interlace RA is determined by the number of consecutive interlace allocation patterns according to the number of interlaces (M). For example, when M=10, the number of signaling bits for an interlace RA is 6 bits. Therefore, in this case, the total number of signaling bits for four interlace RAs is 6×4=24 bits.

[0090] In contrast, in this embodiment, for example, when the BWP is 80 MHz, if cluster RA for each LBT subband (20 MHz) is notified on an RIV basis or a bitmap basis, the number of signaling bits for cluster RA is 4 bits. Also, for example, when M=10, the number of signaling bits for interlace RA is 6 bits. Therefore, when the BWP is 80 MHz, the total number of signaling bits for interlace RA and cluster RA is 6 + 4 = 10 bits.

[0091] Therefore, according to the present embodiment, overhead can be reduced compared to the case where interlace RA is notified for each cluster group. Therefore, even in a system bandwidth (or BWP) of 20 MHz or more, for example, base station 100 can appropriately perform frequency scheduling for terminal 200 while reducing signaling overhead.

[0092] Also, if the bandwidth of each cluster RA is the same, the number of terminals that can be frequency-multiplexed in the same slot is the same as the method of transmitting multiple interlace RAs described above. Also, compared to the method of transmitting multiple interlace RAs described above, the method shown in FIG. 10 can also provide a similar frequency diversity gain since signals can be discretely allocated over the entire cluster group length. On the other hand, in the method shown in FIG. 10, the interlace allocation (interlace#0 is allocated in FIG. 10) is the same between cluster groups, but the flexibility of scheduling can be improved by adjusting the bandwidth of the cluster group according to the number of terminals 200 in a cell, for example. For example, when the number of terminals 200 is large, the bandwidth of the cluster group (cluster allocation granularity) can be set small and multiple terminals can be frequency-multiplexed between cluster groups, thereby improving the flexibility of scheduling.

[0093] [Interlace RA configuration example] Next, an example of interlace RA settings will be described.

[0094] In the following, an example of applying the RIV-based allocation method to interlace RA will be shown.

[0095] Fig. 13 shows an example of an RIV. The RIV indicates, for example, a combination of an allocation start position (e.g., PRB number "RBstart") of interlace resources in one cluster and the number (length) L of resources allocated consecutively from the allocation start position. Fig. 13 shows an example of an RIV pattern (in other words, an interlace allocation pattern represented by the allocation start position and the number of resources) when the number of interlaces (M) is 10. The RIV notified from base station 100 to terminal 200 indicates one of the interlace allocation patterns shown in Fig. 13.

[0096] The assignment pattern of the interlace of the continuous band in the frequency domain depends on the number of interlaces. In the example of FIG. 13, the assignment pattern of the interlace of the continuous band indicated by RIV is 11 C 2 = 55 patterns, which is at least 6 bits of information.

[0097] Here, when applying the RIV-based allocation method, an allocation pattern different from the allocation pattern of the interlace of the continuous band (for example, the allocation pattern of the interlace of the discontinuous band) can be added while suppressing an increase in the number of signaling bits. For example, in FIG. 13, in addition to RIV = 0 to 54 corresponding to the interlace pattern of the continuous band, 9 patterns corresponding to the remaining RIV = 55 to 63 are added without increasing the number of signaling bits.

[0098] Hereinafter, a setting example of the interlace RA based on RIV will be described.

[0099] <Example 1 of setting interlace RA> In Setting Example 1, for example, as shown in FIG. 14, in addition to the assignment pattern of consecutive interlaces of the first number of interlaces (for example, M = 10) (for example, RIV = 0 to 54), the assignment pattern of interlaces of a second number of interlaces different from the first number of interlaces (for example, M = 12) is set (in other words, added).

[0100] For example, in FIG. 14, an assignment pattern of an interlace with a continuous allocation length of 1 PRB (in other words, L = 1) within the cluster of M = 12 is added to RIV = 55 to 62.

[0101] In this way, in setting example 1, the interlace RA information includes an interlace allocation pattern when the number of interlaces in a cluster is different (in FIG. 14, when M=10 and when M=12). This allows base station 100 to dynamically change the minimum allocation bandwidth per terminal 200 by using DCI while suppressing an increase in signaling overhead.

[0102] For example, when M=10, the minimum allocated bandwidth (corresponding to N) is 10 PRBs. In contrast, when the contiguous allocation length in a cluster with M=12 is 1 PRB, and the interlace allocation pattern satisfies the OCB regulations, the minimum allocated bandwidth (corresponding to N) is 9 PRBs.

[0103] By narrowing the minimum allocation bandwidth, for example, it becomes possible to allocate narrow bandwidth resources to cell edge terminals that require transmission power to compensate for path loss, and performance degradation due to insufficient transmission power at the terminal can be reduced. In addition, in PRB-based block interlace design, emphasis is placed on frequency diversity gain. On the other hand, even in the case of interlace allocation where the continuous allocation length (L) is limited to 1 PRBs, signals are discretely allocated over the entire band equivalent to the cluster group, so sufficient frequency diversity gain can be obtained.

[0104] It is not necessary to include all allocation patterns of interlace of allocation length (L) in RIV. For example, as shown in Fig. 15, in interlace of M=10, some allocation patterns of interlace of allocation length (L) may be excluded. In Fig. 15, as an example, in interlace of M=10, allocation lengths of L={3, 5, 7, 9} are excluded, and the allocation lengths are limited to L={1, 2, 4, 6, 8, 10}.

[0105] As shown in FIG. 15, by evenly thinning out a part of the notifiable allocation length L, a significant decrease in the degree of freedom of scheduling allocation can be prevented. Also, instead of the excluded patterns, more patterns with different interlace numbers (M) can be added, so the scheduling gain can be improved. For example, in FIG. 15, all allocation patterns with L = 1 for M = 12 (in other words, patterns with RBstart = 0 to 11) can be added. By adding the pattern with an interlace allocation length L = 1 for M = 12, the number of terminals that can be frequency multiplexed can be increased, and the minimum bandwidth per terminal can be reduced. Also, even for the pattern with L = 1, since signals are discretely arranged over the entire band corresponding to the cluster group, a sufficient frequency diversity gain can be obtained.

[0106] <Example 2 of interlace RA setting> In Example 2, for example, as shown in FIG. 14, in addition to the interlace pattern of the continuous band with the first interlace number (for example, M = 10), an allocation pattern of no transmission of uplink data (No transmission) is added.

[0107] Thereby, while suppressing an increase in signaling overhead, the base station 100 can instruct no transmission of uplink data to a desired terminal 200 using DCI.

[0108] For example, when the base station 100 wants to allocate the uplink data band to another terminal 200 and instruct a single transmission of SRS (Sounding Reference Signal), it can instruct a single transmission of SRS by instructing No transmission (for example, RIV = 63 in FIG. 14) by RIV.

[0109] Alternatively, as described above, when a plurality of interlace RAs are notified for each cluster group (e.g., for each LBT subband), since the base station 100 can independently instruct No transmission in each interlace RA, the frequency resources allocated to the terminal 200 can be controlled in units of cluster groups.

[0110] <Example 3 of interlace RA settings> In Setting Example 3, for example, as shown in FIG. 16, in addition to the interlace pattern of a continuous band with a certain number of interlaces (e.g., M = 10), a partial allocation pattern within the cluster group (in other words, the allocation pattern in some groups) is added.

[0111] For example, in FIG. 16, for RIV = 0 to 54, the interlace allocation pattern for all clusters within the cluster group allocated by the cluster RA is set.

[0112] Also, in FIG. 16, for RIV = 55 to 58, the interlace allocation pattern for the first half of the clusters (e.g., the clusters on the low-frequency side) within the cluster group allocated by the cluster RA is set. In other words, in RIV = 55 to 58 shown in FIG. 16, the second half of the clusters within the cluster group allocated by the cluster RA are not allocated to the terminal 200.

[0113] Similarly, in FIG. 16, for RIV = 59 to 62, the interlace allocation pattern for the second half of the clusters (e.g., the clusters on the high-frequency side) within the cluster group allocated by the cluster RA is set. In other words, in RIV = 59 to 62 shown in FIG. 16, the first half of the clusters within the cluster group allocated by the cluster RA are not allocated to the terminal 200.

[0114] Accordingly, for example, the base station 100 can dynamically control (in other words, schedule) the partial allocation of interlaces within the cluster group assigned to the terminal 200 (for example, the cluster group assigned by the cluster RA). Also, the minimum bandwidth for the terminal 200 can be reduced while suppressing an increase in signaling overhead.

[0115] <Example 4 of interlace RA setting> In Setting Example 4, attention is focused on the relationship between the number of interlaces (M) and the number of signaling bits in the RIV-based allocation method and the bitmap-based allocation method.

[0116] FIG. 17 shows an example of the relationship between the number of interlaces (M) and the number of signaling bits in the RIV-based allocation method and the bitmap-based allocation method. In FIG. 17, the horizontal axis represents the number of interlaces (M), and the vertical axis represents the number of signaling bits.

[0117] As shown in FIG. 17, when M is small, the difference in the number of signaling bits between the RIV-based allocation method and the bitmap-based allocation method is small. For example, when M is 4 or less, there is no difference in the number of signaling bits between the RIV-based allocation method and the bitmap-based allocation method. Also, when M = 5 or 6, the difference between the RIV-based allocation method and the bitmap-based allocation method is 1 bit.

[0118] Also, in NR-U, for example, as shown in FIG. 2, it is being considered that the number of interlaces with M = 6 or less is supported at SCS = 30 kHz and 60 kHz.

[0119] Therefore, in Configuration Example 4, for example, as shown in FIG. 18, when the SCS is equal to or less than a threshold value (e.g., 15 kHz), the RIV-based allocation method is applied to interlace RA, and when the SCS is greater than the threshold value (e.g., 15 kHz), the bitmap-based allocation method is applied to interlace RA.

[0120] Thereby, for example, in an SCS (e.g., 15 kHz) where the bandwidth per 1 PRB is small and a relatively large number of interlaces (M) are applied, the RIV-based allocation method is applied. This can reduce the signaling overhead.

[0121] On the other hand, in an SCS (e.g., 30 kHz or 60 kHz) where the bandwidth per 1 PRB is large and a relatively small number of interlaces (M) are applied, the bitmap-based allocation method is applied. Thereby, while suppressing an increase in signaling overhead, it becomes possible to perform an allocation including a discontinuous interlace allocation pattern by the bitmap, and the scheduling gain can be improved.

[0122] As described above, according to Configuration Example 4, a frequency resource allocation method suitable for the SCS can be applied.

[0123] <Configuration Example 5 of interlace RA> In Configuration Example 5, the interlace RA information is notified of a continuous virtual interlace allocation pattern. In other words, the interlace RA information indicates continuous virtual interlace numbers (virtual interlace numbers).

[0124] For example, the base station 100 notifies the terminal 200 of an allocation pattern of consecutive interlaces using a virtual interlace number (PRB number). The terminal 200 converts the notified virtual interlace number (PRB number) into an actual interlace number (PRB number) according to a rule defined between the base station 100 and the terminal 200. The terminal 200 assigns a signal to the interlace of the converted actual interlace number.

[0125] For example, in the example shown in Fig. 19, virtual interlace numbers #0 to #9 are assigned to interlaces (in other words, PRBs) in a cluster. Also, in the example shown in Fig. 19, the actual interlace numbers are numbers obtained by cyclically shifting the virtual interlace numbers #0 to #9 by 5 PRBs in each cluster. In other words, in Fig. 19, the conversion rule from virtual interlace numbers to actual interlace numbers is the same among multiple clusters.

[0126] In FIG. 19, base station 100 notifies terminal 200 of the allocation pattern of consecutive interlaces with virtual interlace numbers #4 to #6 by the RIV-based allocation method.

[0127] In Fig. 19, terminal 200 converts the virtual interlace number in each cluster into an actual interlace number by cyclically shifting the virtual interlace number in the cluster by 5 PRBs in all clusters. This makes it possible to assign interlaces distributed to both ends of each cluster (e.g., interlace #5, #6 and interlace #4) to terminal 200 in Fig. 19. Also, in Fig. 19, the conversion rule from the virtual interlace number to the actual interlace number is made the same among multiple clusters, which simplifies the process.

[0128] Next, in the example shown in Fig. 20, virtual interlace numbers #0 to #9 are assigned to interlaces (in other words, PRBs) in a cluster, similarly to Fig. 19. In the example shown in Fig. 20, the actual interlace numbers are numbers obtained by cyclically shifting the virtual interlace numbers #0 to #9 by 5 PRBs in cluster #X, and numbers obtained by cyclically shifting the virtual interlace numbers #0 to #9 by 3 PRBs in cluster #Y. In other words, in Fig. 20, the conversion rule from the virtual interlace numbers to the actual interlace numbers is different between multiple clusters.

[0129] In FIG. 20, base station 100 notifies terminal 200 of the allocation pattern of consecutive interlaces with virtual interlace numbers #4 to #6 by the RIV-based allocation method.

[0130] In Fig. 20, terminal 200 converts virtual interlace numbers to actual interlace numbers, for example, according to a rule that is predetermined for each cluster. For example, in Fig. 20, terminal 200 cyclically shifts virtual interlace numbers by 5 PRBs in cluster number X. Also, terminal 200 cyclically shifts virtual interlace numbers by 3 PRBs in cluster number Y.

[0131] In this way, by making the conversion rule from a virtual interlace number to an actual interlace number different between clusters, it is possible to randomize the transmission resources allocated to terminal 200. This makes it possible to randomize interference to other cells, thereby improving system performance.

[0132] In this way, in setting example 5, by converting virtual allocation into actual allocation in terminal 200, discontinuous interlaced allocation within a cluster becomes possible, and frequency diversity gain can be improved.

[0133] Also, in Setting Example 5, by notifying a continuous virtual interlace allocation pattern according to the RIV-based allocation method, the signaling overhead can be reduced.

[0134] In Setting Example 5, the case of converting to the actual interlace number by cyclically shifting the virtual interlace number has been described, but the conversion rule is not limited to this. For example, in the interlace RA information, continuous virtual interlace numbers may be notified, and the actual interlace numbers corresponding to the continuous virtual interlace numbers may be associated with non-continuous interlaces.

[0135] The setting examples of interlace RA have been described above.

[0136] [Setting Examples of Cluster RA] Next, the setting examples of cluster RA will be described.

[0137] <Setting Example 1 of Cluster RA> In Setting Example 1, the cluster RA information is notified by a continuous virtual cluster group allocation pattern. In other words, the cluster RA information indicates continuous virtual cluster group numbers (virtual cluster group numbers).

[0138] For example, the base station 100 notifies the terminal 200 of the allocation pattern of continuous cluster groups using virtual cluster group numbers. The terminal 200 converts the notified virtual cluster group numbers into actual cluster group numbers according to a rule predetermined between the base station 100 and the terminal 200. The terminal 200 allocates signals to clusters within the cluster group of the converted actual cluster group number.

[0139] For example, in the example shown in FIG. 21, virtual interlace numbers #0 to #X are respectively assigned to the cluster groups within the BWP. Also, in the example shown in FIG. 21, the actual cluster group number (actual cluster group number) is the number obtained by circularly shifting virtual interlace numbers #0 to #X by -3 within the BWP.

[0140] In FIG. 21, the base station 100 notifies the terminal 200 of the allocation pattern of consecutive cluster groups of virtual cluster group numbers #2 to #3 by the RIV-based allocation method.

[0141] In FIG. 21, the terminal 200 converts to the actual cluster group number, for example, by circularly shifting virtual cluster group numbers #2 and #3 by -3. Thereby, in FIG. 21, for example, the cluster groups distributed at both ends of the BWP (for example, actual cluster groups #3 and #2) can be allocated to the terminal 200.

[0142] In this way, in the terminal 200, by converting the virtual allocation to the actual allocation, for example, non-consecutive allocation within the BWP (or system bandwidth) becomes possible, and the frequency diversity gain can be improved.

[0143] For example, as shown in FIG. 21, even when the bandwidth of the cluster group to be allocated is small (when the allocated bandwidth is small), by allocating non-consecutively to both ends of the BWP, the OCB regulation can be satisfied. Also, by notifying the allocation pattern of consecutive virtual cluster groups by the RIV-based allocation method, the signaling overhead can be reduced.

[0144] <Example 2 of cluster RA setting> In setting example 2, attention is focused on the fact that when the number of cluster groups per BWP (or system band) is small, the difference in the number of signaling bits between the RIV-based allocation method and the bitmap-based allocation method is small.

[0145] For example, as shown in FIG. 22, when the number of cluster groups per BWP is less than or equal to a threshold (e.g., 4), the bitmap-based allocation method is applied to the cluster RA, and when the number of cluster groups per BWP is greater than the threshold, the RIV-based allocation method is applied to the cluster RA.

[0146] As a result, when the number of cluster groups per BWP is large, the signaling overhead can be reduced by applying the RIV-based allocation method.When the number of cluster groups per BWP is small, the bitmap-based allocation method can be used to suppress an increase in signaling overhead, and the bitmap enables allocation including discontinuous cluster allocation patterns, improving the scheduling gain.

[0147] An example of cluster RA settings has been explained above.

[0148] As described above, in this embodiment, terminal 200 allocates signals to resources based on frequency resource allocation information indicating allocations (e.g., cluster RA) of multiple cluster groups obtained by grouping multiple clusters obtained by dividing a frequency band (e.g., a system band or BWP) and allocations (e.g., interlace RA) of interlaces within a cluster, and transmits the signals. Furthermore, base station 100 receives signals transmitted from terminal 200 based on the cluster RA and interlace RA for terminal 200.

[0149] This allows base station 100 to flexibly schedule or frequency-multiplex terminals 200 in units of cluster groups, for example, even when the system bandwidth (or BWP) differs for each terminal 200, or when the system bandwidth is, for example, 20 MHz or more.

[0150] Therefore, according to this embodiment, signals can be appropriately transmitted and received when operating in an unlicensed band (for example, NR-U).

[0151] The embodiments of the present disclosure have been described above.

[0152] (Other embodiments) (1) The above-described embodiment has been described with respect to a frequency resource allocation method assuming an uplink, which is transmission from terminal 200 to base station 100. However, one embodiment of the present disclosure can also be applied, for example, to a downlink, which is transmission from base station 100 to terminal 200, and can also be applied to a wireless communication link (e.g., a sidelink) established in communication between terminals 200 (e.g., vehicle-to-vehicle communication).

[0153] The methods described in the above-mentioned embodiments may be used alone or in combination. The method to be used may be switched depending on the situation (e.g., communication environment and / or traffic volume). For example, the communication environment may be represented by at least one of Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), and Signal-to-Interference plus Noise power Ratio (SINR).

[0154] In the above-described embodiment, the uplink data channel (PUSCH) has been described as an example of a transmission signal for which frequency resource allocation is performed. However, the transmission signal is not limited to the PUSCH. For example, the transmission signal may be another signal transmitted from the terminal 200 (corresponding to the transmitting device) to the base station 100 (corresponding to the receiving device).

[0155] In addition, each interlace is not limited to being distributed in PRB units in the frequency domain, but may be distributed in units consisting of subcarrier groups less than the subcarriers constituting one PRB. In addition, the frequency interval of the resources in which the interlaces are arranged is not limited to being equal.

[0156] Furthermore, the number of clusters in a specific frequency band (e.g., system band), the number of interlaces in a cluster, the number of cluster groups, the number of clusters in a cluster group, and the number of subcarriers per interlace (or PRB) are not limited to those exemplified in the above embodiments, and may be other values.

[0157] In addition, in the above embodiment, the operation in an unlicensed band has been described. However, the present disclosure is not limited to an unlicensed band, and can also be applied to a licensed band, and similar effects can be obtained.

[0158] Other embodiments have been described above.

[0159] The present disclosure can be realized by software, hardware, or software linked to hardware. Each functional block used in the description of the above embodiment may be realized partially or entirely as an LSI, which is an integrated circuit, and each process described in the above embodiment may be controlled partially or entirely by one LSI or a combination of LSIs. The LSI may be composed of individual chips, or may be composed of one chip to include some or all of the functional blocks. The LSI may have input and output data. Depending on the degree of integration, the LSI may be called an IC, a system LSI, a super LSI, or an ultra LSI. The method of integration is not limited to LSI, and may be realized by 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 manufacture, or a reconfigurable processor that can reconfigure the connections and settings of circuit cells inside the LSI may be used. The present disclosure may be realized as digital processing or analog processing. Furthermore, if a new integrated circuit technology that can replace LSI appears due to the progress of semiconductor technology or a derivative technology, it is possible to integrate the functional blocks using that technology. The application of biotechnology is also a possibility.

[0160] The present disclosure may be implemented in any type of apparatus, device, or system having a communication function (collectively referred to as a communication apparatus). The communication apparatus may include a radio transceiver and processing / control circuitry. The radio transceiver may include a receiver and a transmitter, or both as functions. The radio transceiver (transmitter and receiver) may include a radio frequency (RF) module and one or more antennas. The RF module may include an amplifier, an RF modulator / demodulator, or the like. Non-limiting examples of communication devices include telephones (e.g., cell phones, smartphones, etc.), tablets, personal computers (PCs) (e.g., laptops, desktops, notebooks, etc.), cameras (e.g., digital still / video cameras), digital players (e.g., digital audio / video players), wearable devices (e.g., wearable cameras, smart watches, tracking devices, etc.), game consoles, digital book readers, telehealth and telemedicine devices, communication-enabled vehicles or mobile conveyances (e.g., cars, airplanes, boats, etc.), and combinations of the above devices.

[0161] Communications Equipment includes, but is not limited to portable or mobile equipment, non-portable or fixed equipment, devices and systems of any kind, such as smart home devices (appliances, lighting equipment, smart meters or metering devices, control panels, etc.), vending machines and any other "Things" that may exist on an Internet of Things (IoT) network.

[0162] Communications include data communications via cellular systems, wireless LAN systems, communications satellite systems, etc., as well as data communications via combinations of these.

[0163] A communications apparatus also includes devices, such as controllers and sensors, connected or coupled to a communications device that performs the communications functions described in this disclosure, such as controllers and sensors that generate control and data signals used by the communications device to perform the communications functions of the communications apparatus.

[0164] The communication apparatus also includes infrastructure facilities, such as base stations, access points, and any other apparatus, device, or system that communicates with or controls the various apparatuses listed above, but are not limited to these.

[0165] A transmission device according to an embodiment of the present disclosure includes: a circuit for allocating signals to resources based on control information indicating group allocation among a plurality of groups obtained by grouping a plurality of blocks obtained by dividing a frequency band and resource allocation within the blocks; A transmitter for transmitting the signal.

[0166] In one embodiment of the present disclosure, the bandwidth of the group is a bandwidth for performing carrier sensing.

[0167] In one embodiment of the present disclosure, the group is composed of the smallest blocks whose bandwidth is equal to or greater than a specified minimum bandwidth.

[0168] In an embodiment of the present disclosure, the first control information indicating the resource allocation includes an allocation start position within one block, and the number of resources to be allocated consecutively from the allocation start position.

[0169] In one embodiment of the present disclosure, the first control information indicates one of a plurality of patterns of the allocation start position and the number of resources, and the plurality of patterns include patterns in which the number of resources constituting one block is different.

[0170] In an embodiment of the present disclosure, the first control information indicates one of a plurality of patterns of the allocation start position and the number of resources, and the plurality of patterns includes a pattern of no transmission of the signal.

[0171] In one embodiment of the present disclosure, the first control information indicates one of a plurality of patterns of the allocation start position and the number of resources, and the plurality of patterns includes a pattern for some of the allocated groups.

[0172] In one embodiment of the present disclosure, when the subcarrier spacing is equal to or less than a threshold, first control information indicating the resource allocation includes an allocation start position within one block and the number of resources to be allocated consecutively from the allocation start position, and when the subcarrier spacing is greater than the threshold, the first control information includes a bitmap indicating whether or not each resource within one block is allocated.

[0173] In one embodiment of the present disclosure, the control information indicating the resource allocation indicates consecutive virtual resource numbers, and the circuit converts the virtual resource numbers into resource numbers of the resources and assigns the signal to the resources of the converted resource numbers.

[0174] In an embodiment of the present disclosure, the second control information indicating the group allocation includes an allocation start position in the frequency band, and the number of groups to be consecutively allocated from the allocation start position.

[0175] In one embodiment of the present disclosure, the control information indicating the group allocation indicates consecutive virtual group numbers, and the circuit converts the virtual group numbers to group numbers of the groups and assigns the signals to the resources within the groups of the converted group numbers.

[0176] In one embodiment of the present disclosure, when the number of groups in the frequency band is greater than a threshold, the control information indicating the group allocation includes an allocation start position in the frequency band and the number of groups to be consecutively allocated from the allocation start position, and when the number of groups is equal to or less than the threshold, the control information indicating the group allocation includes a bitmap indicating the presence or absence of an allocation to a group in the frequency band.

[0177] A receiving device according to one embodiment of the present disclosure includes a circuit for determining group assignments among a plurality of groups obtained by grouping a plurality of blocks into which a frequency band is divided, and resource assignments within the blocks, and a receiver for receiving a signal based on the group assignments and the resource assignments.

[0178] A transmission method according to one embodiment of the present disclosure assigns a signal to resources based on control information indicating group assignment among multiple groups obtained by grouping multiple blocks into which a frequency band is divided, and resource assignment within the blocks, and transmits the signal.

[0179] A receiving method according to one embodiment of the present disclosure determines group assignments among a plurality of groups obtained by grouping a plurality of blocks into which a frequency band is divided, and resource assignments within the blocks, and receives a signal based on the group assignments and the resource assignments.

[0180] The disclosures of the specification, drawings and abstract contained in Japanese Patent Application No. 2019-024180, filed on February 14, 2019, are incorporated herein by reference in their entirety. [Industrial Applicability]

[0181] An embodiment of the present disclosure is useful in a mobile communication system. [Explanation of symbols]

[0182] 100 base stations 101 Scheduling Department 102 Holding part 103 Modulation section 104,209 Transmitter 105,201 Antennas 106,202 Receiver 107 FFT section 108 Demapping section 109 IDFT Department 110 Demodulation and decoding section 200 terminals 203 Demodulation section 204 Frequency resource allocation calculation unit 205 Encoding and Modulation Section 206 DFT section 207 Mapping Department 208 IFFT section

Claims

1. a circuit for transmitting control information including the first resource allocation information; a receiver that receives a signal on a resource determined based on the first resource allocation information; The first resource allocation information indicates a set of one or more interlace numbers, each of which is composed of a plurality of resource blocks arranged at regular intervals in a frequency domain; the first resource allocation information includes a bitmap indicating a starting interlace number and a consecutive number of consecutive interlace numbers in a first case, and indicating a set of the one or more interlace numbers in a second case, and a subcarrier spacing in the first case is smaller than a subcarrier spacing in the second case; Base station.

2. The first resource allocation information indicates a start interlace number and a number of consecutive interlace numbers in the consecutive interlace numbers. The base station according to claim 1 .

3. The first resource allocation information indicates a start interlace number and a number of consecutive interlace numbers when a subcarrier spacing is equal to or less than a threshold. The base station according to claim 1 .

4. the first resource allocation information includes a bitmap indicating a set of the one or more interlace numbers when a subcarrier spacing is greater than a threshold; The base station according to claim 1 .

5. the control information includes second resource allocation information, the second resource allocation information indicating a number of consecutive resource block sets from a starting resource block set; the resources are determined based on a first resource block in the set of one or more interlace numbers and a second resource block set determined based on the second resource allocation information; The base station according to claim 1 .

6. Each of the consecutive resource block sets is 20 MHz. The base station according to claim 5.

7. transmitting control information including the first resource allocation information; receiving a signal on a resource determined based on the first resource allocation information; The first resource allocation information indicates a set of one or more interlace numbers, each of which is composed of a plurality of resource blocks arranged at regular intervals in a frequency domain; the first resource allocation information includes a bitmap indicating a starting interlace number and a consecutive number of consecutive interlace numbers in a first case, and indicating a set of the one or more interlace numbers in a second case, and a subcarrier spacing in the first case is smaller than a subcarrier spacing in the second case; Communication methods.

8. The first resource allocation information indicates a start interlace number and a number of consecutive interlace numbers in the consecutive interlace numbers. The communication method according to claim 7.

9. The first resource allocation information indicates a start interlace number and a number of consecutive interlace numbers when a subcarrier spacing is equal to or less than a threshold. The communication method according to claim 7.

10. the first resource allocation information includes a bitmap indicating a set of the one or more interlace numbers when a subcarrier spacing is greater than a threshold; The communication method according to claim 7.

11. the control information includes second resource allocation information, the second resource allocation information indicating a number of consecutive resource block sets from a starting resource block set; the resources are determined based on a first resource block in the set of one or more interlace numbers and a second resource block set determined based on the second resource allocation information; The communication method according to claim 7.

12. Each of the consecutive resource block sets is 20 MHz. The communication method according to claim 11.

13. transmitting control information including first resource allocation information; receiving a signal on a resource determined based on the first resource allocation information; The first resource allocation information indicates a set of one or more interlace numbers, each of which is composed of a plurality of resource blocks arranged at regular intervals in a frequency domain; the first resource allocation information includes a bitmap indicating a starting interlace number and a consecutive number of consecutive interlace numbers in a first case, and indicating a set of the one or more interlace numbers in a second case, and a subcarrier spacing in the first case is smaller than a subcarrier spacing in the second case; Integrated circuits.

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