RU2801312C9 - Transmitting device, receiver, transmission method and reception method - Google Patents

Abstract

FIELD: communications.

SUBSTANCE: to reduce the transmitted service information, a terminal is provided that appropriately transmits and receives signals when operating in an unlicensed band. The terminal (200) comprises: a mapping unit (207) for allocating a signal to a resource based on control information indicating the allocation of groups from the plurality of groups obtained by grouping the plurality of blocks into which the frequency band is divided, and allocating resources in blocks; and a transmitter unit (209) for signal transmission.

EFFECT: reduced transmitted service information.

18 cl, 22 dwg

Description

Field of technology

[0001] The present invention relates to a transmitting apparatus, a receiving apparatus, a transmission method and a reception method.

State of the art

[0002] In the 5G standardization process, the 3GPP consortium is considering a new radio access technology (New Radio, NR), which is not necessarily backward compatible with the LTE network/LTE-Advanced network.

[0003] Studies have been conducted on NR operation in unlicensed bands that do not require a license, in addition to licensed bands that require a license, such as LTE License-Assisted Access (LAA) (see ., for example, non-patent literature (hereinafter - NPL) 1). Operation in unlicensed bands is referred to, for example, as NR-based unlicensed spectrum access (NR-U).

List of bibliographic references

Non-patent literature

[0004] NPL 1

3GPP TR 38.889 V16.0.0 (2018-12), Study on NR-based access to unlicensed spectrum (Release 16)

NPL 2

3GPP TS 36.213 V14.5.0 (2017-12), E-UTRA Physical layer procedures (Release 14)

Disclosure of the invention

[0005] However, methods of signal transmission/reception when operating in unlicensed bands have not been fully studied.

[0006] One non-limiting embodiment provides a transmitting apparatus, a receiving apparatus, a transmission method, and a reception method, each configured to respectively enable transmission/reception of signals when operating in unlicensed bands.

[0007] A transmitting apparatus according to an embodiment of the present invention comprises: circuitry that, in operation, assigns a signal to a resource based on control information indicating allocation of a group from a plurality of groups obtained by grouping a plurality of blocks into which a frequency band is divided, and allocation of a resource at least at least in one of many blocks; and a transmitter that transmits the signal during operation.

[0008] It should be noted that general or specific embodiments may be implemented as a system, method, integrated circuit, computer program, storage medium, or any selected combination thereof.

[0009] According to an embodiment of the present invention, it is possible to appropriately transmit/receive signals when operating in unlicensed bands.

[0010] Additional advantages and disadvantages of the disclosed embodiments will become apparent from the description and drawings. These advantages and/or advantages may be separately obtained by various embodiments and features according to the present description and drawings, without necessarily using all of them to obtain one or more of such advantages and/or advantages.

Brief description of drawings

[0011]

In FIG. 1 shows an example of a block interleaving scheme based on a physical resource block;

in FIG. 2 shows an example of the relationship between the number of interlaces and the number of physical resource blocks per interlace;

in FIG. 3 shows another example of a block interleaving scheme based on a physical resource block;

in FIG. 4 is a block diagram illustrating the configuration of a base station part;

in FIG. 5 is a block diagram illustrating the configuration of a terminal part;

in FIG. 6 is a block diagram illustrating the configuration of a base station;

in FIG. 7 is a block diagram illustrating the configuration of the terminal;

in FIG. 8 is a flow chart of typical operations performed in the base station and terminal;

FIG. 9 illustrates an example of frequency resource allocation;

FIG. 10 illustrates an example of a cluster group configuration;

FIG. 11 illustrates another example of a cluster group configuration;

FIG. 12 illustrates another example of a cluster group configuration;

FIG. 13 illustrates an example of a VR interleaving configuration;

FIG. 14 illustrates another example of a VR interleaving configuration;

FIG. 15 illustrates another example of a VR interleaving configuration;

FIG. 16 illustrates another example of a VR interleaving configuration;

FIG. 17 illustrates an example of the relationship between the number of interlaces and the number of signal bits;

FIG. 18 illustrates an example of the relationship between subcarrier spacing and interleaving methods;

FIG. 19 illustrates an example of interleaving allocation using virtual interleaving numbers;

FIG. 20 illustrates another example of interleaving allocation using virtual interleaving numbers;

FIG. 21 illustrates an example of cluster group allocation using virtual cluster group numbers; And

FIG. 22 illustrates an example of the relationship between the number of cluster groups and methods for selecting a cluster group.

Carrying out the invention

[0012] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0013] In unlicensed bands, the upper limit of Power Spectral Density (PSD) is determined, for example, by laws, regulations and standards. The European Telecommunications Standards Institute (ETSI), for example, has set an upper limit of 10 dBm/MHz (17 dBm/Hz depending on band), for example, for power spectral density in the 5 GHz band at terminals ( also called mobile stations or User Equipment (UE)) with power control functionality.

[0014] In order to transmit signals with higher transmit power while limiting power spectral density, it is necessary to allocate resources in the frequency domain and match the signals. In relation to the above, research has been conducted on the application of a physical resource block-based block interleaving scheme (also called block-interleaved frequency division multiple access (B-IFDMA)) as a method for allocating frequency resources ( see, for example, NPL 1).

[0015] In FIG. 1 shows an example of a block interleaving scheme based on a physical resource block.

[0016] A block interleaving scheme based on a physical resource block is used as a method for allocating frequency resources for a Physical Uplink Shared Channel (PUSCH), which is a channel for transmitting uplink data. in LTE-LAA. A physical resource block-based block interleaving scheme is a bandwidth (i.e., resource) signaling technique called interleaving, whereby blocks are distributed at specific intervals in the frequency domain within the system bandwidth to comply with the channel's occupied bandwidth limitation ( Occupied Channel Bandwidth (OCB) in unlicensed bands defined by ETSI and to mitigate the effect of power spectral density limitation.

[0017] Interleaving uses a group of contiguous subcarriers (eg, 1 Physical Resource Block (PRB)). For example, a plurality of interlaces are included in a band (hereinafter referred to as a cluster or block of clusters) by dividing a system bandwidth or a bandwidth part (BWP) of a system bandwidth into a plurality of blocks. The interlaces included in each cluster have corresponding numbers (hereinafter referred to as “interlace numbers”).

[0018] It should be noted that a cluster means, for example, a “slot” in which interlaces with the same interlace number are located. In other words, interlaces with the same interlace number are uniformly distributed in the frequency domain across multiple clusters.

[0019] For example, a frequency resource allocation method for PUSCH in LTE-LAA (for example, also referred to as uplink resource allocation type 3) includes using a PRB-based block interleaving scheme in which the number of interleavings (hereinafter referred to as "M" ) is 10, and the number of physical resource blocks per interlace (hereinafter referred to as “N”; i.e., the number of clusters) is 10 physical resource blocks, as shown in FIG. 1. In addition, the system bandwidth in LTE-LAA is no more than 20 MHz (100 physical resource blocks), and subcarrier spacing (SCS) is fixed at 15 kHz.

[0020] The allocation of a frequency resource for PUSCH to a terminal is determined, for example, by a base station (eg, also called a Node B or gNB). The base station indicates certain frequency resource allocation information (eg, also called a resource allocation field) to the terminal, for example, by including it in Downlink Control Information (DCI).

[0021] Here, the frequency resource allocation information consists of, for example, a resource indication value (RIV), which is control information uniquely associated with the combination of the starting position interleaving number (for example, the starting physical resource block: RB _START ) in the cluster and the contiguous allocation length (i.e., number of physical resource blocks; eg, L) from the start position, as shown in FIG. 1. Hereinafter, the method of indicating a frequency resource by a combination of the starting position of the resource and the length of the resource sequentially used from the starting position is referred to as the “resource indicating value-based allocation method.”

[0022] LTE-LAA has 55 RB _{INITIAL combinations.} and L, since M = 10. Thus, the frequency resource allocation information (resource indication value) has an information volume of 6 bits. In addition, the cluster interleaving allocation specified by the resource indication value applies to all clusters in the system band.

[0023] Meanwhile, the values indicated in FIG. 2 have been studied as applicable to NR-U, for example, with respect to the number of interlaces (M) and the number of physical resource blocks (N) per interlace (see, for example, NPL 1).

[0024] For example, studies have been conducted on supporting multiple subcarrier spacing values and supporting different numbers of interlaces (M) for different subcarrier spacing values in the NR-U, as shown in FIG. 2.

[0025] In addition, research has been conducted on supporting multiple system frequency bands (parts of the bandwidth) with different bandwidths in the NR-U. FIG. 3 illustrates an example of a system bandwidth configuration in which 20 MHz = 106 physical resource blocks, subcarrier spacing = 15 kHz, M = 10 and N = 10 or 11. FIG. 3 interleaving numbers No. 0, 1, ..., 9 are assigned to the corresponding interleavings in the clusters.

[0026] As shown in FIG. 3, the cluster at the end of the system bandwidth (cluster #10 in FIG. 3) sometimes has a different bandwidth value than the other clusters, depending on the system bandwidth. For example, the bandwidth value for each of clusters No. 0 to No. 9 is 10 physical resource blocks, while the bandwidth value for cluster No. 10 is 6 physical resource blocks (interleave No. 0 to No. 5) in FIG. 3. Thus, N = 11 for interleave No. 0 to No. 5 and N = 10 for interleave No. 6 to No. 9 in FIG. 3.

[0027] In addition, studies have been conducted in NR-U regarding supporting a system bandwidth of 20 MHz or more and indicating frequency resource allocation for the entire system bandwidth using one downlink control information.

[0028] Thus, the frequency resource allocation method for NR-U must take into account the system bandwidth of 20 MHz or more, unlike the frequency resource allocation method in LTE-LAA.

[0029] In addition, the system bandwidth (or part of the bandwidth) in some cases differs for each terminal in the NR-U. Thus, it is required to be able to perform flexible frequency multiplexing between terminals configured with different system bandwidths.

[0030] In addition, since the NR-U supports multiple subcarrier spacing values, it is necessary to discuss a method for allocating a frequency resource suitable for each subcarrier spacing. In addition, it is necessary to discuss the use case of a frequency resource allocation method based on a resource indication value.

[0031] Thus, methods for transmitting and receiving uplink signals in the NR-U will be described below.

[0032] [Communication System Overview]

The communication system according to an embodiment of the present invention includes a base station 100 and a terminal 200. In the following description, the base station 100 (corresponding to a receiving apparatus) determines a frequency resource to be allocated to the terminal 200 and transmits information indicating the specific resource as an example. Then, the terminal 200 (corresponding to the transmitting apparatus) performs signal transmission processing including resource matching based on the specified information, and transmits the signal to the base station 100.

[0033] In FIG. 4 is a block diagram illustrating a configuration example of a portion of the base station 100 according to an embodiment of the present invention. In the base station 100 shown in FIG. 4, the scheduling module 101 determines an allocation (eg, cluster resource allocation (AR)) for groups of a plurality of groups (eg, cluster groups) resulting from grouping a plurality of blocks (eg, clusters) into which the frequency band is divided, and an allocation (eg, UR interleaving) resources (eg, interleaving) in blocks. The receiver 106 receives signals based on group allocation and resource allocation.

[0034] In FIG. 5 is a block diagram illustrating a configuration example of a portion of the terminal 200 according to an embodiment of the present invention. In the terminal 200 shown in FIG. 5, the mapping unit 207 assigns signals to resources based on control information indicating the allocation (eg, BP cluster) of groups from a plurality of groups (eg, cluster groups) as a result of grouping a plurality of blocks (eg, clusters) into which the frequency band is divided, and allocation (eg, BP interleaving) resources (eg, interleaving) in blocks. The transmitter 209 transmits signals.

[0035] [Base station configuration]

In FIG. 6 is a block diagram illustrating the configuration of the base station 100 according to the present embodiment.

[0036] As shown in FIG. 6, the base station 100 includes a scheduling unit 101, a data storage unit 102, a modulator 103, a transmitter 104, an antenna 105, a receiver 106, a fast Fourier transform (FFT) performing unit 107, an inverse mapping unit 108, an inverse discrete Fourier transform performing unit 109 ( ODFT) and demodulator/decoder 110.

[0037] The scheduling unit 101 determines a radio resource allocation (eg, frequency resource allocation, time resource allocation, or transmit power control information) for a data uplink channel (PUSCH) for the terminal 200 connected to the base station 100. The scheduling unit 101 outputs certain information. about the allocation of radio resources to the data storage module 102 and the modulator 103.

[0038] In this case, frequency resource allocation is determined, for example, by frequency resource allocation for interleaving in a cluster (hereinafter referred to as interleaving resource allocation (interleave RA)) and frequency resource allocation for groups of clusters (hereinafter referred to as cluster resource allocation (cluster RR) ) in accordance with the rules that will be described below. In other words, the frequency resource allocation information indicated to the terminal 200 is formed from 2 types of frequency resource allocation information, which is interleaving BP information and cluster BP information.

[0039] It should be noted that "group of clusters" means a band including, for example, one or many contiguous clusters in the frequency domain.

[0040] The bandwidth or subcarrier spacing of a portion of the bandwidth of the terminal 200 may be indicated in advance by the base station 100 to the terminal 200, for example, through higher layer signaling (also called RRC signaling). In addition, some of the frequency resource allocation information may be conveyed through higher layer signaling.

[0041] For example, interleaving BP information may be transmitted through downlink control information, and cluster BP information may be transmitted through higher layer signaling. This allows scheduling module 101 to dynamically control interleaving allocation in the cluster, for example, according to communication quality. At the same time, the average change in communication quality between groups of clusters is relatively small and, thus, although static control using higher-level signaling for the VR cluster has little effect on performance, the transmitted overhead can be reduced.

[0042] The data storage unit 102 stores frequency resource allocation information (including, for example, interleaving VR information and cluster UR information) received from the scheduling unit 101 for receiving a signal transmitted from the terminal 200 to which the frequency resource has been allocated. , and outputs information to the reverse mapping module 108 when receiving a signal from a particular terminal 200.

[0043] The modulator 103 generates downlink control information (DCI) based on the radio resource allocation information received from the scheduling module 101, modulates the generated DCI, and outputs the DCI to the transmitter 104.

[0044] The transmitter 104 performs transmission processing such as digital-to-analog conversion, frequency upconversion, and amplification of the signal received from the modulator 103, and transmits the signal after transmission processing through the antenna 105.

[0045] The receiver 106 receives the signal transmitted from the terminal 200 via the antenna 105, performs reception processing such as downconversion and A/D conversion of the received signal, and outputs the received signal after the reception processing to the FFT 107.

[0046] The FFT 107 removes the cyclic prefix (CP) portion from the received signal received from the receiver 106, converts the signal into a frequency domain signal using FFT processing, and outputs the frequency domain signal to the inverse mapper 108.

[0047] The inverse mapping module 108 extracts a signal corresponding to the frequency resource allocated to the specific terminal 200 from the frequency domain signal supplied from the FFT 107 based on the interleaving VR information and the cluster VR information for the specific terminal 200 received from the module 102 data storage. The inverse mapping module 108 outputs the extracted signal to the DIFT 109.

[0048] The IDFT 109 performs IDFT processing on the signal received from the inverse mapper 108 and outputs the signal to the demodulator/decoder 110. It should be noted that the IDFT 109 (IDFT processing) is required when the terminal 200 transmits an orthogonal frequency multiplexing signal channel division with expansion by discrete Fourier transform (Discrete Fourier Transform-spread Orthogonal Frequency Division Multiplexing, DFT-S-OFDM). ODFT 109 (ODFT processing) is not required when terminal 200 transmits an OFDM signal. The transmission method (DFT-S-OFDM or OFDM) of the terminal 200 may be predetermined by the base station 100 based on the communication state (eg, initial transmit power range) for the terminal 200 and indicated to the terminal 200 using, for example, higher layer signaling.

[0049] The demodulator/decoder 110 performs demodulation processing and decoding processing on the signal received from the IDFT 109 and outputs the received data.

[0050] [Terminal configuration]

In FIG. 7 is a block diagram illustrating the configuration of the terminal 200 according to the present embodiment.

[0051] As shown in FIG. 7, terminal 200 includes an antenna 201, a receiver 202, a demodulator 203, a frequency resource allocation calculation module 204, an encoder/modulator 205, a DFT 206, a mapper 207, an IFFT 208, and a transmitter 209.

[0052] The receiver 202 receives the signal transmitted from the base station 100 via the antenna 201, performs reception processing such as downconversion and analog-to-digital conversion of the received signal, and outputs the received signal after the reception processing to the demodulator 203.

[0053] The demodulator 203 demodulates the received signal received from the receiver 202 and outputs the demodulated downlink control information to the frequency resource allocation calculation unit 204.

[0054] The frequency resource allocation calculation unit 204 calculates frequency resource allocation information (eg, interleaving VR information and cluster UR information) based on the downlink control information received from the demodulator 203, and outputs the information to the mapping unit 207.

[0055] Encoder/modulator 205 encodes and modulates transmission data (i.e., uplink data) and outputs the modulated data signal to DFT 206.

[0056] The DFT 206 performs DFT processing on the data signal received from the encoder/modulator 205, and outputs the signal after the DFT processing to the mapper 207. It should be noted that DFT 206 (DFT processing) is required when terminal 200 transmits the DFT-S-OFDM signal. DFT 206 (DFT processing) is not required when terminal 200 transmits an OFDM signal.

[0057] The mapping module 207 maps (i.e., assigns) the data signal received from the DFT 206 to the frequency resource based on the frequency resource allocation information received from the frequency resource allocation calculation module 204 . For example, the mapping module 207 maps the data signal to the frequency resource with the specified interleaving number in the clusters included in the specified group of clusters. The mapping module 207 outputs the mapped data signal to the FIBF 208.

[0058] IFFT 208 performs IFFT processing on the signal received from mapper 207 and outputs the cyclic prefix-added signal to transmitter 209.

[0059] The transmitter 209 performs transmission processing such as digital-to-analog conversion, frequency upconversion, and amplification of the signal received from the FIBF 208, and transmits the signal after transmission processing through the antenna 201.

[0060] [Typical operations performed at base station 100 and terminal 200]

Next, typical operations performed on the base station 100 and terminal 200 having the above-described configurations will be described.

[0061] In FIG. 8 is a flow chart of typical operations performed at base station 100 (FIG. 6) and terminal 200 (FIG. 7).

[0062] As shown in FIG. 8, the base station 100 performs scheduling for the terminal 200 (ST101).

[0063] The base station 100 transmits, for example, radio resource allocation information indicating a scheduling result for the terminal 200 to the terminal 200 (ST102). The radio resource allocation information includes frequency resource allocation information including, for example, interleaving BP information and cluster BP information. It should be noted that each of the interleaving BP information and the cluster BP information may be indicated by the base station 100 to the terminal 200 through higher layer signaling or downlink control information as described above. The terminal 200 receives the frequency resource allocation information indicated by the base station 100 (ST103).

[0064] The terminal 200 maps data (eg, PUSCH signal) to a resource based on the received frequency resource allocation information (ST104). The terminal 200 transmits data associated with the resource to the base station 100 (ST105).

[0065] The base station 100 retrieves data transmitted from the terminal 200 based on the frequency resource allocated to the terminal 200 (ST106).

[0066] [Method of frequency resource allocation]

Next, an exemplary method for allocating a frequency resource in the scheduling unit 101 will be described.

[0067] In FIG. 9 shows an example of frequency resource allocation using a block interleaving scheme based on a physical resource block according to the present embodiment.

[0068] Frequency resource allocation according to the present embodiment is performed by combining frequency resource allocation for cluster interleaving (interleaving IR) and frequency resource allocation for groups of clusters in a system frequency band or sub-bandwidth (cluster IR).

[0069] As used herein, “group of clusters” means a band including one or adjacent clusters in the frequency domain. In other words, a group of clusters is configured by grouping a plurality of clusters resulting from dividing a frequency band, such as a system band or a portion of a band.

[0070] In addition, "interleaving BP" indicates a resource for dedicated interleaving in clusters. In other words, the interleaving BP indicates the allocation of an interleaving resource in the clusters to the terminal 200.

[0071] In addition, "cluster BP" indicates a resource for allocated groups of clusters in a portion of the bandwidth (or system bandwidth). In other words, the cluster BP indicates the allocation of a cluster group from a plurality of cluster groups to the terminal 200.

[0072] It should be noted that FIG. 9 illustrates an interleaving BP and a cluster BP, both of which are allocation based on a resource indication value (a combination of a sequential resource starting position and a resource length), but the allocation method is not limited to this. For example, in interleaving VR or cluster VR, a method may be applied to indicate information about whether an allocation is required for each resource block (a physical resource block or a cluster group block), i.e., information about whether each of the interleaves in the clusters is allocated. In the following, this method is referred to as bitmap-based allocation.

[0073] As shown in FIG. 9, for example, a cluster BP is configured with Cluster _START = 2 and _Cluster L = 2 for terminal 200. Terminal 200 then determines that two groups of clusters from cluster groups #2 and cluster #3 are allocated from among cluster groups #0 to cluster #X in part of the bandwidth (eg, also called part of the uplink bandwidth).

[0074] In addition, as shown, for example, in FIG. 9, the interleaving BP is configured with RB _INITIAL = 4 and L = 3 for the terminal 200. The terminal 200 then determines that three interlaces are allocated from interlaces #4 to #6.

[0075] Thus, the terminal 200 determines that interlaces No. 4 to No. 6 in cluster groups No. 2 and No. 3 are allocated (as shown in FIG. 9).

[0076] In the present embodiment, the cluster BP is specified in addition to the interleaving BP as described above. This allows different groups of clusters (i.e., different clusters) to be allocated to different terminals 200 even when, for example, those terminals 200 are configured with different system bandwidths (or portions of bandwidths). Thus, according to the present embodiment, it is possible to flexibly perform frequency multiplexing between terminals 200 configured with, for example, different system bandwidths or portions of the bandwidth.

[0077] [Cluster group configuration example]

Next, examples of cluster group configurations will be described.

[0078] <Cluster group configuration example 1>

Groups of clusters are configured in Listen Before Talk (LBT) sub-bands (also called LBT blocks), as, for example, shown in FIG. 10. The LBT sub-band is a frequency band in which the terminal 200 and the base station 100 perform carrier detection. For example, the bandwidth for the LBT sub-band (including the guard band) is 20 MHz.

[0079] In the example shown in FIG. 10, a portion of the bandwidth is 40 MHz (216 physical resource blocks), and a group of clusters is configured for each LBT subband (108 physical resource blocks). For example, a portion of the bandwidth that is 40 MHz (216 physical resource blocks) is divided into groups of clusters of 108 physical resource blocks each (FIG. 10).

[0080] This allows the base station 100 to control the allocation of a frequency resource in blocks of a cluster group in accordance with the interference state of the terminal 200 in each LBT subband. Thus, the base station 100 can properly perform frequency scheduling for the terminal 200 even within a system bandwidth (or portion of a bandwidth) of, for example, 20 MHz or more.

[0081] It should be noted that, as shown in FIG. 10, the bandwidth values for clusters at both ends of groups of clusters (8 physical resource blocks, 2 physical resource blocks, or 6 physical resource blocks in FIG. 10) may be different from the bandwidth values for other clusters (10 physical resource blocks in FIG. 10 ).

[0082] <Cluster group configuration example 2>

As shown in FIG. 11, cluster groups may be configured by dividing an LBT subband (eg, 20 MHz, 106 physical resource blocks) into cluster blocks such that, for example, cluster groups have substantially the same number of clusters.

[0083] In the example shown in FIG. 11, part of the bandwidth is 20 MHz (106 physical resource blocks) and is divided into two groups of clusters. The group of clusters on the first half (i.e., on the lower frequency side) shown in FIG. 11 is formed from 50 physical resource blocks from five clusters No. 0 to No. 4. The group of clusters in the second half (i.e., on the higher frequency side) is formed from 56 physical resource blocks from six clusters No. 5 to No. 10.

[0084] This allows the base station 100 to increase the number of terminals 200 subject to frequency multiplexing in the LBT subband.

[0085] <Cluster Group Configuration Example 3>

A cluster group is formed from a minimum number of clusters having a bandwidth equal to or greater than the specified minimum bandwidth, and the minimum number of clusters is the bandwidth of the cluster group. For example, as shown in FIG. 12, each group of clusters is formed of two clusters, which is the minimum number of clusters with a bandwidth of 2 MHz or more.

[0086] The value of 2 MHz is the minimum bandwidth when determining temporary operation according to the occupied channel bandwidth specification defined by ETSI. According to the regulations, while some signals meet 80-100% of the occupied channel bandwidth specification, for other signals only 2 MHz or more in the same COT is sufficient. Thus, in the example shown in FIG. 12, each group of clusters is formed from two clusters with a minimum bandwidth of 2 MHz or more. It should be noted that the minimum bandwidth is not limited to 2 MHz and may be different.

[0087] This allows the base station to 100 perform frequency scheduling on a per-terminal basis with greater granularity while still meeting occupied channel bandwidth specification requirements.

[0088] Examples of cluster group configurations have been described above.

[0089] Let's move on to discuss the case of specifying BP interleaving for each group of clusters (eg, for each LBT subband) instead of BP cluster. For example, when a portion of the bandwidth is 80 MHz, four BP interleavings for the corresponding LBT subbands (20 MHz each) are indicated to the terminal 200. For the number of signal bits of each interlace BP, the number of adjacent interlace extraction circuits is determined in accordance with the number of interlaces (M). When M = 10, for example, the interleaving BP includes 6 signal bits. Thus, the total number of signal bits of four BP interleaving is determined in this case to be 24 bits by multiplying 6 by 4.

[0090] In the present embodiment, on the contrary, the cluster BP contains 4 signal bits when, for example, part of the bandwidth is 80 MHz, and the cluster BP for each LBT subband (20 MHz) is indicated based on the resource indication value or bitmap. When M = 10, for example, the interleaving BP includes 6 signal bits. Thus, when the bandwidth portion is 80 MHz, the total number of interleaving BP and cluster BP signal bits is determined to be 10 bits by adding 6 to 4.

[0091] Thus, the present embodiment can reduce the overhead compared to the case of specifying BP interleaving for each group of clusters. This allows the base station 100 to properly perform frequency scheduling for the terminal 200 while reducing the transmitted overhead even within a system bandwidth (or portion of a bandwidth) such as 20 MHz or more.

[0092] In addition, when all BPs of a cluster have the same bandwidth, the number of terminals that can be frequency multiplexed in the same slot is the same, as in the above-described multi-BP interleaving method. In addition, the signals can still be distributed along the length of a group of clusters (according to the method shown in FIG. 10), thereby providing a frequency diversity gain equivalent to the frequency diversity gain in the above-described multi-interleaver transmission method. Although the interleaving allocation (interleaving allocation #0 in FIG. 10) is the same among groups of clusters according to the method illustrated in FIG. 10, scheduling flexibility can be improved, for example, by adjusting the bandwidth values for groups of clusters according to the number of terminals 200 in a cell. When there are a large number of terminals 200, for example, scheduling flexibility can be improved by configuring narrower bandwidth for cluster groups (configuring higher allocation granularity for clusters) and by frequency multiplexing multiple terminals in cluster groups.

[0093] [Example VR Interleaving Configuration]

Next, examples of VR interleaving configurations will be described.

[0094] In the following, an allocation method based on a resource indication value is applied to BP interleaving as an example.

[0095] In FIG. Figure 13 shows examples of the resource indication value. The resource indication value indicates, for example, a combination of the allocation starting position (eg, the physical resource block number "RB _STARTING ") of the interleaving resources in one cluster and the number of resources (length) L sequentially allocated from the allocation starting position. In FIG. 13 shows examples of resource indication value schemes (i.e., interleaving allocation schemes indicated by the starting allocation position and the number of resources) for the case where the number of interlaces (M) is 10. The resource indication value indicated by the base station 100 to the terminal 200 specifies any from the interleaving circuits shown in FIG. 13.

[0096] Schemes for separating contiguous interlaces in the frequency domain depend on the number of interlaces. In the example of FIG. The 13 contiguous interlace allocation circuits indicated by the resource indication value include ₁₁ C ₂ = 55 circuits that represent information of at least 6 bits.

[0097] Here, using the resource indication value-based allocation method allows allocation schemes other than adjacent interlace allocation schemes (eg, non-adjacent interlace allocation schemes) to be added, thereby preventing an increase in the number of signal bits. As shown in FIG. 13, for example, the number of signal bits is not increased even if 9 patterns corresponding to the remaining resource indication values, i.e., 55 to 63, are added to resource indication values 0 to 54, corresponding to the adjacent interleaving patterns.

[0098] Next, examples of BP interleaving configurations based on the resource indication value will be described.

[0099] <VR Interleaving Configuration Example 1>

In configuration example 1 shown in FIG. 14, allocation circuits (eg, resource indication values = 0 to 54) of adjacent interlaces are configured for a first number of interlaces (eg, M = 10), and other interlace allocation schemes are also configured (ie, added) for a second number of interlaces ( for example, M = 12), which differs, for example, from the first number of interleavings.

[0100] FIG. 14 illustrates additional interleaving allocation schemes, for example, for resource indication values 55 through 62. These allocation schemes are for interleaving with a contiguous allocation length of 1 physical resource block (i.e., L = 1) in a cluster in which M = 12.

[0101] In configuration example 1, the interleaving BP information contains interleaving allocation patterns for different numbers of interlaces in the cluster (M=10 and M=12 (FIG. 14)), as described above. This allows the base station 100 to dynamically change the minimum allocation bandwidth for a single terminal 200 using downlink control information while preventing an increase in transmitted overhead.

[0102] When M = 10, for example, the minimum allocation bandwidth (corresponding to N) is 10 physical resource blocks. In this case, the minimum allocation bandwidth (corresponding to N) is 9 physical resource blocks for interleaving allocation schemes, which allows meeting the requirements of the occupied channel bandwidth specification when M = 12 and the contiguous allocation length is 1 physical resource block in the cluster.

[0103] When the minimum allocation bandwidth is reduced, a narrow bandwidth resource may be allocated to a cell edge terminal that requires transmit power to compensate for path losses, for example, thereby reducing the terminal performance degradation due to shortage transmission power. Here, the block interleaving scheme based on the physical resource block focuses on the gain from frequency diversity. In this regard, an interleaving allocation with a contiguous allocation length (L) limited to 1 physical resource block still causes the signals to be distributed over a band corresponding to a group of clusters, thereby providing sufficient frequency diversity gain.

[0104] It should be noted that the resource indication values do not necessarily contain interleaving allocation schemes for all allocation length (L) values. As shown in FIG. 15, interleaving allocation patterns for some values of the allocation length (L) may be omitted, for example, in an interleaving in which M = 10. As shown in FIG. 15, as an example, the allocation length values L = {3, 5, 7, 9} are excluded and the allocation length values L = {1, 2, 4, 6, 8, 10} are left in the interleaving in which M = 10.

[0105] As shown in FIG. 15, uniformly thinning out some of the specified allocation length L values prevents significant loss of flexibility in allocation scheduling. In addition, for a different number of interleavings (M), more other circuits can be added to replace the excluded circuits, thereby improving the scheduling gain. For example, as shown in FIG. 15, you can add all the allocation circuits for the case when M = 12 and L = 1 (i.e., circuits for the case when RB _INITIAL = 0 to 11). By adding circuits for the case where M = 12 and the interleaving allocation length L = 1, the number of terminals that can be frequency multiplexed increases and the minimum bandwidth for each terminal narrows. In addition, the designs for the case when L = 1 still cause the signals to be distributed over the band corresponding to the group of clusters, thus providing sufficient frequency diversity gain.

[0106] <Example 2 of VR interleaving configuration>

In configuration example 2 shown in FIG. 14, an allocation circuit without uplink data transmission (no transmission) is added to the adjacent interleaving circuits, for example, for the first number of interlaces (for example, M = 10).

[0107] This allows the base station 100 to indicate the absence of uplink data transmission to a specific terminal 200 using downlink control information while preventing an increase in transmitted overhead information.

[0108] For example, when uplink data bandwidth is allocated to another terminal 200 and one Sounding Reference Signal (SRS) transmission is required to be indicated, base station 100 may indicate "No Transmission" using a resource indication value (e.g., an indication value resource = 63 in FIG. 14), i.e. indicate a one-time SRS transmission.

[0109] Alternatively, when multiple interleaving BPs are specified for each group of clusters (eg, for each LBT subband) as described above, base station 100 may independently indicate "No Transmission" at each interleaving BP, thereby managing the frequency resource , to be allocated to terminal 200 in blocks of cluster groups.

[0110] <Example 3 of VR interleaving configuration>

In configuration example 3 shown in FIG. 16, partial allocation schemes in a group of clusters (ie, allocation schemes for part of the group) are added to the adjacent interleaving schemes, for example, for a certain number of interlaces (eg, M = 10).

[0111] For example, resource indication values 0 to 54 configure interleaving allocation schemes for all clusters in a group of clusters allocated during cluster VR (FIG. 16).

[0112] In addition, resource indication values 55 to 58 provide configuration of interleaving allocation schemes for the first half of the clusters (eg, lower frequency side clusters) in the group of clusters allocated in cluster VR (FIG. 16). In other words, the second half of the clusters in the group of clusters allocated by cluster BP are not allocated to the terminal 200 using the resource indication values 55 to 58 shown in FIG. 16.

[0113] Likewise, resource indication values 59 to 62 configure interleaving allocation patterns for the second half of the clusters (eg, higher frequency side clusters) in the group of clusters allocated in cluster VR (FIG. 16). In other words, the first half of the clusters in the group of clusters allocated by cluster BP are not allocated to the terminal 200 using the resource indication values 59 to 62 shown in FIG. 16.

[0114] This allows base station 100 to dynamically manage (ie, schedule) partial interleaving allocations in a group of clusters allocated to, for example, terminal 200 (eg, a group of clusters allocated to a cluster BP). In addition, it is possible to reduce the minimum bandwidth for terminal 200 without increasing the transmitted overhead.

[0115] <Example 4 of VR interleaving configuration>

Configuration Example 4 focuses on the relationship between the number of interleave (M) and the number of signal bits in the resource indication value-based allocation method and the bitmap-based allocation method.

[0116] FIG. 17 illustrates an example of the relationship between the number of interleave (M) and the number of signal bits in the resource indication value-based allocation method and the bitmap-based allocation method. The horizontal axis indicates the number of interlaces (M), and the vertical axis indicates the number of signal bits (FIG. 17).

[0117] As shown in FIG. 17, when the value of M is small, the difference in the number of signal bits between the allocation method based on the resource indication value and the allocation method based on the bitmap is small. For example, when the value of M is 4 or less, there is no difference in the number of signal bits between the allocation method based on the resource indication value and the allocation method based on the bitmap. When M is 5 or 6, the difference between the resource indication value-based allocation method and the bitmap-based allocation method is 1 bit.

[0118] In this regard, studies have been carried out in NR-U to support, for example, the number of interleave M equal to 6 or less when the subcarrier spacing = 30 kHz and 60 kHz, as shown in FIG. 2.

[0119] In this regard, in configuration example 4 shown in FIG. 18, for example, for VR interleaving, an allocation method based on a resource indication value is applied when the subcarrier spacing is equal to or less than a threshold value (eg, 15 kHz), and for VR interleaving, an allocation method based on a bitmap is applied when the subcarrier spacing is greater than a threshold value. (eg 15 kHz).

[0120] Thus, the resource indication value-based allocation method is applied, for example, to a subcarrier spacing (eg, 15 kHz) that has a narrow bandwidth per physical resource block and in which a relatively large number of interlaces (M) is applied. This allows you to reduce the transmitted overhead information.

[0121] In contrast, the bitmap-based allocation method is used for subcarrier spacing (eg, 30 kHz or 60 kHz), which has a large bandwidth per physical resource block and which uses a relatively small number of interleavings (M). This makes it possible to provide allocation incorporating non-contiguous interleaved allocation schemes using a bitmap while preventing an increase in transmitted overhead, thereby improving scheduling gains.

[0122] As described above, configuration example 4 allows a frequency resource allocation method suitable for subcarrier spacing to be applied.

[0123] <VR Interleaving Configuration Example 5>

In configuration example 5, a contiguous virtual interlace allocation scheme is specified as interleaving VR information. In other words, the VR interlace information indicates adjacent virtual interlace numbers.

[0124] For example, the base station 100 specifies an adjacent interlace allocation scheme to the terminal 200 using virtual interleaving numbers (physical resource block numbers). The terminal 200 converts the specified virtual interleaving numbers (physical resource block numbers) into actual interleaving numbers (physical resource block numbers) in accordance with a rule determined between the base station 100 and the terminal 200. The terminal 200 assigns signals to the interlaces with the actual interleaving numbers that have been converted .

[0125] In the example shown in FIG. 19, virtual interleaving numbers No. 0 to No. 9 are respectively assigned to interleaves (ie, physical resource blocks), for example, in a cluster. In the example shown in FIG. 19, the actual interleaving numbers are numbers obtained by rotating the virtual interleaving numbers No. 0 to No. 9 by 5 physical resource blocks in each cluster. In other words, the rule for converting virtual interleaving numbers into actual interleaving numbers is the same for multiple clusters, as shown in FIG. 19.

[0126] As shown in FIG. 19, the base station 100 indicates to the terminal 200 an adjacent interlace allocation scheme of virtual interlace numbers No. 4 to No. 6 using an allocation method based on the resource indication value.

[0127] As shown in FIG. 19, the terminal 200 converts the virtual interleaving numbers in the cluster into actual interleaving numbers, for example, by rotating by 5 physical resource blocks in all clusters. This allows interlaces distributed at both ends of each cluster (eg, interlaces #5, #6, and interlace #4) to be allocated to terminal 200 (FIG. 19). In addition, the processing shown in FIG. 19 is simplified by applying the same rule to convert virtual interleaving numbers to actual interleaving numbers for multiple clusters.

[0128] Additionally, in the example shown in FIG. 20, virtual interlace numbers No. 0 to No. 9 are respectively allocated to interlaces (ie, physical resource blocks), for example, in a cluster, as shown in FIG. 19. In the examples shown in FIG. 20, the actual interleaving numbers in cluster No. X are the numbers obtained by rotating the virtual interleaving numbers No. 0 to No. 9 by 5 physical resource blocks, and the actual interleaving numbers in cluster No. Y are the numbers obtained by rotating the virtual interleaving numbers. interleaving from No. 0 to No. 9 into 3 blocks of physical resource. In other words, the rule for converting virtual interlace numbers into actual interlace numbers differs between clusters of a plurality of clusters, as shown in FIG. 20.

[0129] As shown in FIG. 20, the base station 100 indicates to the terminal 200 an adjacent interlace allocation scheme of virtual interlace numbers No. 4 to No. 6 using an allocation method based on the resource indication value.

[0130] As shown in FIG. 20, the terminal 200 converts the virtual interleaving numbers into actual interleaving numbers, for example, according to a rule specified for each cluster. For example, terminal 200 rotates virtual interleaving numbers by 5 physical resource blocks in cluster number X (FIG. 20). In addition, the terminal 200 cyclically shifts the virtual interleaving numbers by 3 physical resource blocks in cluster number Y.

[0131] The transmission resources allocated to terminal 200 may be randomized by applying various rules to convert virtual interleaving numbers into actual interleaving numbers for clusters, as described above. This allows interference from another cell to be randomized and improves system performance.

[0132] In configuration example 5, converting the virtual allocation to an actual allocation in the terminal 200 enables non-contiguous interleaving allocation in a cluster as described above, thereby improving the frequency diversity gain.

[0133] In addition, in configuration example 5, specifying an adjacent virtual interlace allocation scheme using an allocation method based on the resource indication value can reduce the transmitted overhead information.

[0134] It should be noted that although configuration example 5 describes the case of converting virtual interlace numbers into actual interlace numbers by rotating, the conversion rule is not limited to this. For example, adjacent virtual interlace numbers may be indicated in the VR interlace information, and actual interlace numbers corresponding to adjacent virtual interlace numbers may be associated with non-adjacent interlaces.

[0135] Examples of BP interleaving configurations have been described above.

[0136] [Example VR cluster configuration]

Next, examples of VR cluster configurations will be described.

[0137] <VR cluster configuration example 1>

In configuration example 1, the scheme for allocating groups of adjacent virtual clusters is specified as information about the cluster VR. In other words, the cluster VR information indicates the group numbers of adjacent virtual clusters.

[0138] For example, base station 100 indicates a scheme for allocating a group of contiguous clusters to terminal 200 using virtual cluster group numbers. The terminal 200 converts the specified virtual cluster group numbers into actual cluster group numbers in accordance with a predetermined rule between the base station 100 and the terminal 200. The terminal 200 assigns signals to the clusters in the cluster groups with the actual cluster group numbers that have been converted.

[0139] For example, in the example shown in FIG. 21, virtual interlace numbers No. 0 to No. X are respectively assigned to cluster groups in the bandwidth portion. In the examples shown in FIGS. 21, the group numbers of the actual clusters are numbers obtained by rotating the virtual interleaving numbers No. 0 to No. X by -3 in the bandwidth portion.

[0140] As shown in FIG. 21, the base station 100 indicates to the terminal 200 a scheme for allocating a group of contiguous clusters with virtual cluster group numbers No. 2 and No. 3 using an allocation method based on the resource indication value.

[0141] As shown in FIG. 21, the terminal 200 converts the group numbers of virtual clusters No. 2 and No. 3 into actual cluster group numbers, for example, by rotating by -3. This allows the terminal 200 to allocate groups of clusters distributed, for example, at both ends of a portion of the bandwidth (eg, actual cluster groups #3 and #2), as shown in FIG. 21.

[0142] As described above, converting a virtual allocation to an actual allocation at terminal 200 allows non-contiguous allocation to be used in a portion of the bandwidth (or system bandwidth), for example, thereby improving the frequency diversity gain.

[0143] For example, occupied channel bandwidth specification requirements can be met by applying non-contiguous allocation at both ends of a portion of the bandwidth, as shown in FIG. 21, even when the group of clusters to be extracted has a small bandwidth (when the allocated bandwidth is small). In addition, specifying an allocation scheme for a group of adjacent virtual clusters using an allocation method based on the resource indication value makes it possible to reduce the transmitted overhead information.

[0144] <Example 2 of VR cluster configuration>

Configuration Example 2 focuses on the fact that when the number of cluster groups per portion of the bandwidth (or system bandwidth) is small, the difference in the number of signaling bits between the resource indication value-based allocation method and the bitmap-based allocation method is small.

[0145] For example, the bitmap-based allocation method is used for a VR cluster when the number of cluster groups per part of the bandwidth is less than or equal to a threshold value (for example, 4), and the resource indication value-based allocation method is used for a VR cluster. when the number of cluster groups per part of the bandwidth exceeds a threshold value, as shown in FIG. 22.

[0146] Thus, the transmitted overhead can be reduced by applying the allocation method based on the resource indication value when the number of cluster groups per part of the bandwidth is large. In contrast, when the number of cluster groups per part of the bandwidth is small, the use of a bitmap-based allocation method can provide allocation including allocation schemes with non-contiguous clusters using a bitmap, while preventing the increase in transmitted overhead, thereby improving the gain from planning.

[0147] Examples of VR cluster configurations have been described above.

[0148] In the present embodiment, the terminal 200 assigns a signal to a resource based on frequency resource allocation information indicating the allocation of a plurality of cluster groups (eg, a VR cluster) obtained by grouping a plurality of clusters into which a frequency band (eg, a system band) is divided or part of the bandwidth), and separating interleaving (eg, BP interleaving) in clusters, and transmitting said signal as described above. The base station 100 then receives the signal transmitted from the terminal 200 based on the cluster VR and interleaving VR for the terminal 200.

[0149] This allows base station 100 to perform flexible scheduling or frequency multiplexing in blocks of cluster groups, for example, for terminals 200, even, for example, when terminals 200 have system bandwidth values (or portions of bandwidth) that are different from each other, or when the system bandwidth is 20 MHz or more.

[0150] Thus, it is possible to appropriately transmit/receive signals when operating in unlicensed bands (eg, NR-U) according to the present embodiment.

[0151] Specific embodiments of the present invention have been described above.

[0152] (Other embodiments)

1. The above have been descriptions of methods for allocating a frequency resource for an uplink, namely for transmission from a terminal 200 to a base station 100, in the above embodiments. However, one embodiment of the present invention is applicable, for example, to a downlink, namely, transmission from a base station 100 to a terminal 200, and is also applicable to a radio link (eg, forward link) established in communication between terminals 200 (eg , communications between vehicles).

[0153] Each of the methods described in the above embodiments may be used alone or in combination. In addition, the method used may depend on the situation (eg, communication and/or traffic environment). The communication environment may be represented, for example, by at least one of the following parameters: Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality Quality, RSRQ) and the signal-to-interference plus Noise power ratio, SINR.

[0154] The uplink data channel (PUSCH) has been described in the above embodiments as an example of a transmission signal for which a frequency resource is allocated. However, the transmission signal is not limited to PUSCH and may be another signal transmitted, for example, from the terminal 200 (corresponding to the transmitting apparatus) to the base station 100 (corresponding to the receiving apparatus).

[0155] In addition, the interleaving is not limited to distribution in physical resource blocks in the frequency domain, and may further be distributed, for example, in blocks of subcarrier groups with fewer subcarriers constituting 1 physical resource block. Moreover, interleaving is not limited to placing resources at equal frequency intervals.

[0156] In addition, the number of clusters, the number of interlaces in clusters, the number of cluster groups, the number of clusters in cluster groups, and the number of subcarriers per interlace (or physical resource block) in a particular frequency band (e.g., a system frequency band) are not limited to examples. described in the above embodiments, and may include other meanings.

[0157] Although the above embodiment has described operations in unlicensed bands, the present disclosure is not only applicable to unlicensed bands. It can also be applied to licensed bands and still provide similar effects.

[0158] Other embodiments have been described above.

[0159] The present invention may be implemented in software, hardware, or software interacting with hardware. Each functional block used in the description of each embodiment above may be partially or completely implemented by an LSI such as an integrated circuit, and each process described in each embodiment may be partially or completely controlled by the same LSI or combinations of LSI. The LSI may be separately implemented as chips, or a single chip may be configured to include some or all of the functional blocks. The LSI may have data input and output associated with it. LSI in this case may be referred to as IC, system LSI, super-LSI or super-LSI depending on the difference in the degree of integration. However, integrated circuit implementation technology is not limited to LSI and it can be implemented using an application-specific circuit, a general purpose processor, or a dedicated processor. In addition, a Field Programmable Gate Array (FPGA) can be used, which can be programmed after the LSI is manufactured, or a reconfigurable processor, in which the connection configuration and settings of circuit cells located within the LSI can be changed. The present invention can be implemented as digital processing or analog processing. If future integrated circuit technology replaces LSI as a result of developments in semiconductor technology or other derivative technology, the functional blocks may be combined using the future integrated circuit technology. Biotechnology can also be used.

[0160] The present invention can be implemented by any type of apparatus, device or system having a communication function, which is referred to as a communication apparatus. Some non-limiting examples of such communications equipment include a telephone (e.g., cellular phone, smartphone), tablet, personal computer (PC) (e.g., laptop, desktop, netbook), camera (e.g., digital camera/video camera), digital player (digital audio/video player), wearable device (e.g., wearable camera, smart watch, tracking device), game console, digital book reader, telemedicine/remote diagnostic and treatment device), and vehicle, providing communication functionality (for example, car, aircraft, ship), as well as various combinations thereof.

[0161] A communications apparatus is not limited to a portable or wearable apparatus and may also include any type of apparatus, device, or system that is not portable or stationary, such as a smart home device (e.g., appliance, lighting, smart meter, control panel) , a vending machine and any other “objects” in the “Internet of Things” (IoT) network.

[0162] Communications may include the exchange of data, for example, through a cellular system, a wireless LAN system, a satellite system, etc., as well as various combinations thereof.

[0163] The communication apparatus may include a device, such as a controller or sensor, that is coupled to a communication device that performs a communication function described in the present disclosure. For example, a communication device may include a controller or sensor that generates control signals or data signals used by a communication device performing a communication function in the communication device.

[0164] The communications apparatus may also comprise an infrastructure entity, such as a base station, an access point, and any other apparatus, device, or system that communicates with or controls the apparatuses, such as the apparatuses illustrated in the above non-limiting examples.

[0165] The transmitting apparatus according to an embodiment of the present invention includes: circuitry that, in operation, assigns a signal to a resource based on control information indicating allocation of a group from a plurality of groups obtained by grouping a plurality of blocks into which the frequency band is divided, and allocation of the resource according to in at least one of a plurality of blocks; and a transmitter that transmits the signal during operation.

[0166] In an embodiment of the present invention, the group has a bandwidth in which carrier detection is performed.

[0167] In an embodiment of the present invention, a group is formed from a minimum number of blocks having a bandwidth equal to or greater than the specified minimum bandwidth, and the minimum number of blocks is the bandwidth of the group.

[0168] In an embodiment of the present invention, resource allocation is indicated by first control information, and the first control information includes a resource allocation starting position in one of a plurality of blocks and a number of resources to be allocated sequentially from the allocation starting position.

[0169] In an embodiment of the present invention, the first control information indicates any of a plurality of patterns of an initial allocation position and an amount of resources, and the plurality of patterns includes a pattern for a case where one of the plurality of blocks is formed from different amounts of resources.

[0170] In an embodiment of the present invention, the first control information indicates any of a plurality of resource allocation starting position and resource amount schemes, and the plurality of schemes includes a scheme with no signal transmission.

[0171] In an embodiment of the present invention, the first control information indicates any of a plurality of allocation starting position and resource amount schemes, and the plurality of schemes includes a scheme for a portion of the allocated group.

[0172] In an embodiment of the present invention, resource allocation is indicated by first control information, and the first control information includes an allocation starting position in one of a plurality of blocks and a number of resources to be allocated sequentially from the allocation starting position when the subcarrier spacing is equal to a threshold value or less thereof, and the first control information includes a bitmap indicating whether each of the resources is allocated in one of the plurality of blocks when the subcarrier spacing exceeds a threshold value.

[0173] In an embodiment of the present invention, control information indicating resource allocation indicates adjacent virtual resource numbers, and circuitry converts virtual resource numbers into resource numbers and assigns a signal to resources with the converted resource numbers.

[0174] In an embodiment of the present invention, group allocation is indicated by second control information, and the second control information includes an allocation starting position in a frequency band and a number of groups to be allocated sequentially from the allocation starting position.

[0175] In an embodiment of the present invention, the control information indicating group allocation indicates adjacent virtual group numbers, and the circuit converts the virtual group numbers into group numbers and assigns a signal to resources in the groups with the converted group numbers.

[0176] In an embodiment of the present invention, control information indicating group allocation includes an initial allocation position in a frequency band and a number of groups to be sequentially allocated from the initial allocation position when the number of groups in a frequency band exceeds a threshold, and control information indicating group allocation includes a bitmap indicating whether groups in a frequency band are allocated when the number of groups is equal to or less than a threshold.

[0177] A receiving apparatus according to an embodiment of the present invention comprises: circuitry that operatively determines the allocation of a group from a plurality of groups obtained by grouping a plurality of blocks into which a frequency band is divided, and the allocation of a resource in at least one of the plurality of blocks; and a receiver that, in operation, receives the signal based on the group allocation and the resource allocation.

[0178] A transmission method according to an embodiment of the present invention includes: assigning a signal to a resource based on control information indicating allocation of a group from a plurality of groups obtained by grouping a plurality of blocks into which a frequency band is divided, and allocation of a resource in at least one of the plurality blocks; and signal transmission.

[0179] A receiving method according to an embodiment of the present invention includes: determining a group allocation from a plurality of groups obtained by grouping a plurality of blocks into which a frequency band is divided, and allocating a resource in at least one of the plurality of blocks; and receiving a signal based on the group allocation and resource allocation.

[0180] This application grants the right and claims the benefit of Japanese Patent Application No. 2019-024180, dated February 14, 2019, the disclosure of which, including the description, drawings and abstract, is incorporated herein by reference in its entirety.

Industrial applicability

[0181] An example embodiment of the present invention can be applied to mobile communication systems.

List of reference items

[0182]

100 Base station

101 Planning module

102 Data storage module

103 Modulator

104, 209 Transmitter

105, 201 Antenna

106, 202 Receiver

107 FFT

108 Reverse mapping module

109 ODPF

110 Demodulator/decoder

200 Terminal

203 Demodulator

204 Frequency resource allocation calculation module

205 Encoder/modulator

206 DPF

207 Mapping module

208 OBPF

Claims (44)

1. A communication device containing: a circuit that, in operation, receives control information including first resource assignment information; And a transmitter that, during operation, transmits a signal to the base station over resources determined based on the first resource assignment information, wherein the first resource assignment information indicates a set of one or more interleaving indices, each of which consists of a plurality of resource blocks at a certain interval in the frequency domain. 2. The communication device according to claim 1, wherein the first resource assignment information indicates an initial interleaving index and a number of adjacent interleaving indexes. 3. The communication device according to claim 1, wherein the first resource assignment information indicates an initial interleaving index and a number of adjacent interleaving indexes in the case where the subcarrier spacing is less than or equal to a threshold value. 4. The communication device of claim 1, wherein the first resource assignment information comprises a bitmap indicating a set of one or more interlaces in case the subcarrier spacing exceeds a threshold value. 5. The communication device of claim 1, wherein the first resource assignment information indicates an initial interleaving index and a number of adjacent interleaving indices in the first case, and the first resource assignment information includes a bitmap indicating a set of one or more interlaces in the second case, wherein the subcarrier spacing in said first case is less than the subcarrier spacing in said second case. 6. The communication device of claim 1, wherein the control information includes second resource assignment information indicating an index of an initial resource block set and a number of contiguous resource block sets, and it is possible to determine resources based on the intersection of first resource blocks of the specified set of one or more interleaving indices and second resource blocks determined based on the second resource assignment information. 7. The communication device of claim 6, wherein each of the contiguous sets of resource blocks has a bandwidth of 20 MHz. 8. A communication method performed by a communication device, including: obtaining control information containing first resource assignment information; And transmission to the base station of a signal on resources determined on the basis of the first information about the assignment of resources, wherein the first resource assignment information indicates a set of one or more interleaving indices, each of which consists of a plurality of resource blocks at a certain interval in the frequency domain. 9. Base station containing: a transmitter that, during operation, transmits control information including first resource assignment information; And a receiver which, during operation, receives from a communication device a signal on resources determined on the basis of the first resource assignment information, wherein said first resource assignment information indicates a set of one or more interleaving indices, each of which consists of a plurality of resource blocks at a specific interval in the frequency domain. 10. The base station according to claim 9, wherein said first resource assignment information indicates a starting interleaving index and a number of adjacent interleaving indexes. 11. The base station as set forth in claim 9, wherein the first resource assignment information indicates an initial interleaving index and a number of adjacent interleaving indexes in a case where the subcarrier spacing is less than or equal to a threshold value. 12. The base station of claim 9, wherein the first resource assignment information comprises a bitmap indicating a set of one or more interlaces in the case where the subcarrier spacing exceeds a threshold value. 13. The base station of claim 9, wherein the first resource assignment information indicates an initial interleaving index and the number of adjacent interleaving indices in the first case, and the first resource assignment information includes a bitmap indicating a set of one or more interlaces in the second case , wherein the subcarrier spacing in said first case is less than the subcarrier spacing in said second case. 14. The base station as set forth in claim 9, wherein the control information includes second resource assignment information indicating an initial resource block set index and a number of contiguous resource block sets, and it is possible to determine resources based on the intersection of first resource blocks of the specified set of one or more interleaving indices and second resource blocks determined based on the second resource assignment information. 15. The base station of claim 14, wherein each of the contiguous sets of resource blocks has a bandwidth of 20 MHz. 16. A communication method performed by a base station, comprising: transmitting control information containing first resource assignment information; And receiving from the communication device a signal on resources determined on the basis of the first information about the assignment of resources, wherein the first resource assignment information indicates a set of one or more interleaving indices, each of which consists of a plurality of resource blocks at a certain interval in the frequency domain. 17. Integrated communication circuit containing: a circuit that, during operation, controls: receiving control information including first resource assignment information; And transmitting a signal to the base station for resources determined on the basis of the first information about the assignment of resources, wherein the first resource assignment information indicates a set of one or more interleaving indices, each of which consists of a plurality of resource blocks at a certain interval in the frequency domain, and at least one output coupled to said circuitry that, during operation, outputs said signal. 18. Communication integrated circuit containing: a circuit that, during operation, controls: transmitting control information including first resource assignment information; And receiving from the communication device a signal on resources determined on the basis of the first information about the assignment of resources, wherein the first resource assignment information indicates a set of one or more interleaving indices, each of which consists of a plurality of resource blocks at a certain interval in the frequency domain, and at least one input connected to said circuit, which is provided with said signal during operation.