JP2022118873A - User device - Google Patents

Abstract

To enable the reduction of a possibility that a side link (SL) transmission with a small hop number multi-hop collides with the other SL transmission in the case where a multi-hop communication is performed.SOLUTION: A user device comprises: a communication processing part that receives data transferred in SL by using a resource contained in a resource pool (RP) for the SL and control information containing hop-related information related to a hop number of the data, from the other user device; and a control part selecting a resource region which is a resource region contained in the RP and can be used for transferring the data on the basis of the hop-related information. The RP contains a plurality of resource regions each having a different size. A larger resource region of the plurality of resource regions corresponds to a smaller hop number. A smaller resource region of the plurality of resource regions corresponds to a larger hop number. The resource region which can be used for transferring the data is one of the plurality of RPs.SELECTED DRAWING: Figure 7

Description

The present disclosure relates to user equipment.

A mobile communication technology has been proposed in 3GPP (3rd Generation Partnership Project) and standardized as a technical specification (TS). Especially now, 5G (5th Generation) technology has been proposed and standardized.

For example, according to Non-Patent Document 1, in 3GPP Release 17, inter-UE coordination, for example, is being considered as an enhancement of side links between user equipment (UE). In such inter-UE coordination, for example, a UE assists in the selection of sidelink resources for other UEs.

For example, Patent Literature 1 describes a method of selecting a sidelink grant from a resource pool. Patent Literature 2 describes a sidelink relay technique performed by a UE. Patent Document 3 describes a multi-hop wireless network formed by a plurality of wireless devices. In particular, Patent Literature 3 describes specifying one of a plurality of time slots according to the number of hops.

Special table 2018-506902 Special table 2018-528648 JP 2008-228176

3GPP TSG RAN WG1#102-e, e-Meeting, August 17th - 28th, 2020, R1-2005501, Nokia, Nokia Shanghai Bell, Discussion of sidelink resource allocation mode 2 enhancements

The inventors found that when multi-hop communication as described in Patent Document 3 is performed on the sidelink, the number of UEs that transfer data increases sharply as the number of hops increases, resulting in a large number of UEs in the resource pool. We have found that resources are used and even important sidelink transmissions with a small number of hops can be prone to collisions with other sidelink transmissions.

SUMMARY OF THE DISCLOSURE It is an object of the present disclosure to provide a user equipment that allows low hop count sidelink transmissions to be less likely to collide with other sidelink transmissions when multi-hop communication takes place on the sidelink. It is in.

A user equipment according to an aspect of the present disclosure includes data transferred on the sidelink using resources included in the resource pool for the sidelink, and control information including hop-related information related to the number of hops of the data. from another user equipment on a sidelink, and based on the hop-related information, selects a resource area included in the resource pool that can be used to transfer the data. and a control unit. The resource pool includes multiple resource regions of different sizes. A larger resource area of the plurality of resource areas corresponds to a smaller number of hops, and a smaller resource area of the plurality of resource areas corresponds to a larger number of hops. The resource area available for transferring the data is one of the plurality of resource pools.

A user equipment according to an aspect of the present disclosure includes data transferred on the sidelink using resources included in the resource pool for the sidelink, and control information including hop-related information related to the number of hops of the data. and a communication processing unit that transmits the data and the control information on a sidelink using the resources included in the resource pool. The resource pool includes multiple resource regions of different sizes. A larger resource area of the plurality of resource areas corresponds to a smaller number of hops, and a smaller resource area of the plurality of resource areas corresponds to a larger number of hops.

Advantageous Effects of Invention According to the present disclosure, it is possible to reduce the possibility that sidelink transmissions with a small number of hops collide with other sidelink transmissions when multihop communication is performed on the sidelinks. It should be noted that the present disclosure may provide other effects instead of or in addition to the above effects.

1 is a diagram showing an example of a schematic configuration of a system according to an embodiment of the present disclosure; FIG. FIG. 2 is a diagram for explaining an example of arrangement of user equipment according to an embodiment of the present disclosure; FIG. 2 is a block diagram showing an example of a schematic functional configuration of a first user device according to an embodiment of the present disclosure; FIG. 2 is a block diagram showing an example of a schematic hardware configuration of a first user device according to an embodiment of the present disclosure; FIG. FIG. 4 is a block diagram showing an example of a schematic functional configuration of a second user device according to an embodiment of the present disclosure; FIG. FIG. 4 is a block diagram showing an example of a schematic hardware configuration of a second user device according to an embodiment of the present disclosure; FIG. FIG. 2 is a diagram for explaining examples of resource pools and resource areas according to an embodiment of the present disclosure; FIG. FIG. 4 is a diagram for explaining an example of resource selection by the first user equipment according to an embodiment of the present disclosure; FIG. 4 is a diagram for explaining an example of resource selection by a second user equipment according to an embodiment of the present disclosure; 4 is a flowchart for explaining an example of a schematic flow of processing of the first user equipment according to an embodiment of the present disclosure; 4 is a flow chart for explaining an example of a schematic flow of processing of a second user equipment according to an embodiment of the present disclosure; FIG. 5 is a diagram for explaining examples of resource pools and resource areas according to the first modification of the embodiment of the present disclosure; FIG. 5 is a diagram for explaining an example of resource selection by the first user equipment according to the first modification of the embodiment of the present disclosure; FIG. 5 is a diagram for explaining an example of resource selection by the second user equipment according to the first modification of the embodiment of the present disclosure; FIG. 12 is a diagram for explaining a first example of multi-hop according to a fifth modified example of the embodiment of the present disclosure; FIG. FIG. 21 is a diagram for explaining a second example of multihop according to the fifth modification of the embodiment of the present disclosure; FIG. FIG. 22 is a diagram for explaining an example of configuration information according to the ninth modification of the embodiment of the present disclosure; FIG.

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In addition, in the present specification and drawings, elements that can be described in the same manner can be omitted from redundant description by assigning the same reference numerals.

The description is given in the following order.
1. System configuration 2 . Configuration of the first user equipment;3. Configuration of the second user equipment;4. Operation example 5. Modification

<1. System configuration>
An example configuration of a system 1 according to an embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 1, system 1 includes UE100, UE200, UE30 and UE40. UE 100 may also be referred to as first user equipment. UE 200 may also be referred to as second user equipment.

For example, the UE 100 is a road side unit (RSU), and the UE 200 is an in-vehicle device mounted on the vehicle 21 . Similarly, UE30 is an in-vehicle device mounted in a vehicle 31, and UE40 is an in-vehicle device mounted in a vehicle 41. FIG. Of course, these are only examples, and UE100, UE200, UE30 and UE40 are not limited to this example.

For example, UE100, UE200, UE30, and UE40 are UEs conforming to the technical specifications (TS) of 3GPP. More specifically, for example, UUE 100, UE 200, UE 30, and UE 40 are UEs conforming to 5G or NR (New Radio) TS. Of course, UE100, UE200, UE30 and UE40 are not limited to this example.

For example, UE30 and UE40 operate similarly to UE200.

(1) Downlink/Uplink Each of UE100, UE200, UE30 and UE40 communicates with a base station when located within the coverage area of the base station. Each of UE100, UE200, UE30, and UE40 receives signals from a base station on the downlink and transmits signals to the base station on the uplink. In other words, each of UE100, UE200, UE30 and UE40 communicates with the base station via the Uu interface. A set of downlinks and uplinks may be referred to as access links.

For example, each of UE100, UE200, UE30, and UE40 communicates with the base station using the RAN protocol stack. For example, the protocol stack, RRC (Radio Resource Control) layer, SDAP (Service Data Adaptation Protocol) layer, PDCP (Packet Data Convergence Protocol) layer, RLC (Radio Link Control) layer, MAC (Medium Access Control) layer and physical (Physical: PHY) layer. Alternatively, the protocol stack may not include all of these layers, but some of these layers.

(2) Sidelinks Each of UE100, UE200, UE30 and UE40 communicates with other UEs on sidelinks. In other words, each of UE100, UE200, UE30 and UE40 communicates with other UEs via the PC5 interface.

For example, each of UE100, UE200, UE30 and UE40 communicates with other UEs using the above protocol stacks.

- Sidelink resource allocation mode For example, each of UE100, UE200, UE30 and UE40 operates in sidelink resource allocation mode 2. That is, each of UE100, UE200, UE30, and UE40 selects a resource in the sidelink resource pool, and uses the selected resource to transmit a signal on the sidelink.

In particular, UE100, UE200, UE30, and UE40 perform multi-hop communication on sidelinks. That is, UE100, UE200, UE30 and UE40 transfer data one after another.

Referring to the example of FIG. 2, for example, first, UE100 transmits data to UE30 on the sidelink (hop 0), UE30 transfers the data to UE200 (hop 1), and UE200 transmits the data. Transfer to UE 40 (hop 2).

Of course, the example of FIG. 2 is only one example of forwarding according to embodiments of the present disclosure, and forwarding according to embodiments of the present disclosure is not limited to this example. More generally, UE100 is the UE that initially transmits data on the sidelink, and UE200 is the UE that transfers the data. UE 200 may perform first-hop forwarding instead of second-hop forwarding, or may perform third-hop forwarding and beyond.

If X is an integer equal to or greater than 0, "hop X", "number of hops X" and "Xth hop" are synonymous in this specification.

<2. Configuration of first user device>
An example configuration of the UE 100 according to the embodiment of the present disclosure will be described with reference to FIGS. 3 and 4. FIG.

(1) Functional Configuration First, an example of the functional configuration of the UE 100 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 3, the UE 100 includes a wireless communication unit 110, a storage unit 120 and a processing unit .

The wireless communication unit 110 wirelessly transmits and receives signals. For example, the wireless communication unit 110 receives signals from base stations and transmits signals to the base stations. For example, the radio communication unit 110 receives signals from other UEs and transmits signals to other UEs.

The storage unit 120 stores various information.

The processing unit 130 provides various functions of the UE 100 . The processing unit 130 includes an information acquisition unit 131 , a control unit 133 and a communication processing unit 135 . Note that the processing unit 130 may further include components other than these components. That is, the processing unit 130 can perform operations other than those of these components. Specific operations of the information acquisition unit 131, the control unit 133, and the communication processing unit 135 will be described in detail later.

For example, the processing unit 130 (communication processing unit 135) communicates with a base station or another UE via the radio communication unit 110. FIG.

(2) Hardware Configuration Next, an example hardware configuration of the UE 100 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 4, UE 100 comprises antenna 181 , RF (radio frequency) circuitry 183 , processor 185 , memory 187 and storage 189 .

Antenna 181 converts a signal into radio waves and radiates the radio waves into space. Also, the antenna 181 receives radio waves in space and converts the radio waves into signals. Antenna 181 may include a transmit antenna and a receive antenna, or may be a single antenna for transmission and reception. Antenna 181 may be a directional antenna and may include multiple antenna elements.

The RF circuit 183 performs analog processing of signals transmitted and received via the antenna 181 . RF circuitry 183 may include high frequency filters, amplifiers, modulators, low pass filters, and the like.

Processor 185 performs digital processing of signals transmitted and received via antenna 181 and RF circuit 183 . The digital processing includes processing of the protocol stack of the RAN. Processor 185 may include multiple processors or may be a single processor. The multiple processors may include a baseband processor that performs the digital processing and one or more processors that perform other processing.

The memory 187 stores programs executed by the processor 185, parameters relating to the programs, and data relating to the programs. The memory 187 may include at least one of ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), RAM (Random Access Memory), and flash memory. All or part of memory 187 may be included within processor 185 .

Storage 189 stores various information. The storage 189 may include at least one of SSD (Solid State Drive) and HDD (Hard Disc Drive).

Wireless communication section 110 may be implemented by antenna 181 and RF circuitry 183 . Storage unit 120 may be implemented by storage 189 . Processing unit 130 may be implemented by processor 185 and memory 187 .

The processing unit 130 may be implemented by an SoC (System on Chip) including a processor 185 and memory 187 . The SoC may include RF circuitry 183 and the wireless communication unit 110 may also be implemented by the SoC.

Considering the above hardware configuration, the UE 100 may include a memory that stores the program (ie, memory 187) and one or more processors that can execute the program (ie, processor 185). One or more processors may execute the programs described above to perform the operations of the processing unit 130 . The program may be a program for causing the processor to execute the operation of the processing unit 130 .

<3. Configuration of Second User Device>
An example configuration of the UE 200 according to the embodiment of the present disclosure will be described with reference to FIGS. 5 and 6. FIG.

(1) Functional Configuration First, an example of the functional configuration of the UE 200 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 5, the UE 200 includes a wireless communication section 210, a storage section 220 and a processing section 230. FIG.

The wireless communication unit 210 wirelessly transmits and receives signals. For example, the wireless communication unit 210 receives signals from base stations and transmits signals to the base stations. For example, the radio communication unit 210 receives signals from other UEs and transmits signals to other UEs.

The storage unit 220 stores various information.

Processing unit 230 provides various functions of UE 200 . The processing unit 230 includes an information acquisition unit 231 , a control unit 233 and a communication processing unit 235 . Note that the processing unit 230 may further include other components other than these components. That is, the processing unit 230 can perform operations other than those of these components. Specific operations of the information acquisition unit 231, control unit 233, and communication processing unit 235 will be described in detail later.

For example, the processing unit 230 (communication processing unit 235) communicates with a base station or another UE via the wireless communication unit 210. FIG.

(2) Hardware Configuration Next, an example of the hardware configuration of the UE 200 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 6, UE 200 comprises antenna 281 , RF circuitry 283 , processor 285 , memory 287 and storage 289 .

Antenna 281 converts a signal into radio waves and radiates the radio waves into space. Also, the antenna 281 receives radio waves in space and converts the radio waves into signals. Antenna 281 may include a transmit antenna and a receive antenna, or may be a single antenna for transmission and reception. Antenna 281 may be a directional antenna and may include multiple antenna elements.

The RF circuit 283 performs analog processing of signals transmitted and received via the antenna 281 . RF circuitry 283 may include high frequency filters, amplifiers, modulators, low pass filters, and the like.

Processor 285 performs digital processing of signals transmitted and received via antenna 281 and RF circuit 283 . The digital processing includes processing of the protocol stack of the RAN. Processor 285 may include multiple processors or may be a single processor. The multiple processors may include a baseband processor that performs the digital processing and one or more processors that perform other processing.

Memory 287 stores programs executed by processor 285, parameters for the programs, and data for the programs. Memory 287 may include at least one of ROM, EPROM, EEPROM, RAM, and flash memory. All or part of memory 287 may be included within processor 285 .

Storage 289 stores various information. Storage 289 may include at least one of SSD and HDD.

Wireless communication section 210 may be implemented by antenna 281 and RF circuitry 283 . Storage unit 220 may be implemented by storage 289 . Processing unit 230 may be implemented by processor 285 and memory 287 .

Processing unit 230 may be implemented by a SoC that includes processor 285 and memory 287 . The SoC may include RF circuitry 283 and the wireless communication unit 210 may also be implemented by the SoC.

Considering the above hardware configuration, the UE 200 may include a memory that stores a program (ie, memory 287) and one or more processors that can execute the program (ie, processor 285). One or more processors may execute the programs described above to perform the operations of the processing unit 230 . The program may be a program for causing the processor to execute the operation of the processing unit 230 .

<4. Operation example>
Examples of operations of the UE 100 and the UE 200 according to embodiments of the present disclosure will be described with reference to FIGS. 7 to 11. FIG.

(1) Resource pool for sidelink A resource pool for sidelink is configured for sidelink transmission by the UE.

For example, the resource pool includes a set of consecutive subchannels in the frequency direction. Each subchannel includes multiple resource blocks (RBs). Further, the resource pool includes multiple slots within a repeating period in the time direction. Of course, the slots do not have to be consecutive.

For example, the resource pool is configured by base stations. That is, the resource pool configuration information is transmitted by the base station. For example, UE100 (communication processing unit 135) and UE200 (communication processing unit 235) receive the configuration information. UE30 and UE40 also receive the configuration information. For example, the configuration information includes information indicating frequency resources of the resource pool and information indicating time resources of the resource pool.

For example, the base station transmits system information including the configuration information. For example, the system information is a System Information Block 12 .

Note that one or more of UE100, UE200, UE30, and UE40 do not directly receive the configuration information from the base station, and receive the configuration information transmitted by the base station and transferred by other UEs. good.

(2) Resource Regions Among other things, the resource pool includes multiple resource regions of different sizes. A larger resource area of the plurality of resource areas corresponds to a smaller number of hops, and a smaller resource area of the plurality of resource areas corresponds to a larger number of hops.

Thereby, for example, the smaller the number of hops, the more resources can be selected from a large resource area. Thus, the smaller the number of hops, the less likely a sidelink transmission will collide with other sidelink transmissions. Conversely, the larger the number of hops, the more resources are selected from among smaller resource regions. Thus, the higher the number of hops, the more likely a sidelink transmission will collide with other sidelink transmissions.

For example, each of the plurality of resource regions overlaps with at least one other resource region included in the plurality of resource regions.

For example, the plurality of resource regions includes a first resource region corresponding to M hops, a second resource region corresponding to M+1 hops, and a third resource region corresponding to M+2 hops. Here, M is any integer greater than or equal to 0. A size reduction rate from the second resource region to the third resource region is greater than a size reduction rate from the first resource region to the second resource region. As a result, for example, when the number of hops increases, the size of the resource area can be rapidly reduced. Therefore, sidelink transmission with a large number of hops can be restricted.

Referring to the example of FIG. 7, resource pool 50 is shown. The resource pool 50 includes a resource region 61 corresponding to hop 0, a resource region 63 corresponding to hop 1, a resource region 65 corresponding to hop 2, and a resource region 67 corresponding to hop 3. The resource regions 61-67 overlap each other. Resource area 61 is the same as resource pool 50 . The size of resource region 63 is half the size of resource region 61 and the size of resource region 65 is half the size of resource region 63 . The size of resource region 67 is one quarter of the size of resource region 65 . That is, the size reduction rate from resource region 67 to resource region 65 (ie, 75% reduction) is greater than the size reduction rate from resource region 63 to resource region 65 (ie, 50% reduction).

For example, the plurality of resource regions are configured by a base station. That is, the configuration information of the plurality of resource regions is transmitted by the base station. For example, UE100 (communication processing unit 135) and UE200 (communication processing unit 235) receive the configuration information. UE30 and UE40 also receive the configuration information. For example, the configuration information includes identification information (eg, ID or index) of each of the plurality of resource regions. For example, the configuration information includes information indicating frequency resources and time resources of each of the plurality of resource regions. The information may indicate the relative position and size of the resource region in the resource pool, or directly indicate the frequency resource and time resource of the resource region. The configuration information of the plurality of resource regions may be included in the configuration information of the resource pool, or may be transmitted together with the configuration information of the resource pool.

Thereby, for example, the resource areas included in the resource pool can be flexibly configured.

One or more of UE100, UE200, UE30 and UE40 may receive the configuration information transmitted by the base station and transferred by other UEs.

(3) Transmission of data by UE 100 The UE 100 (information acquisition unit 131) acquires data and control information to be transferred on the sidelink using resources included in the resource pool. The UE 100 (communication processing unit 135) uses the resources included in the resource pool to transmit the data and the control information on the sidelink.

- Data The above data is transferred by multi-hop communication on the sidelink.

For example, the UE 100 (control unit 133) generates the data. Alternatively, the UE 100 (communication processing unit 135) may receive the data from another device (eg, base station).

- Control information For example, the control information is sidelink control information (SCI). The control information may be 1st stage SCI or 2nd stage SCI. Alternatively, the control information may include both the first stage SCI and the second stage SCI.

Among other things, the control information includes hop-related information related to the number of hops of the data. For example, the hop-related information indicates the hop count of the data. In this example, the UE 100 first transmits the data on the sidelink, so the hop count is 0. Therefore, the hop-related information indicates 0 as the hop count of the data.

The hop-related information allows, for example, a UE that receives the data and the control information to know the number of hops of the data.

-Resource For example, the UE 100 (control unit 133) selects the resource included in the resource pool.

For example, the UE 100 (control unit 133) selects resource regions included in the resource pool. Referring to the example of FIG. 7 again, the hop count of the data is 0, so the UE 100 (control unit 133) selects the resource region 61 (=resource pool 50).

For example, the UE 100 (control unit 133) selects resources included in the selected resource region. As an example, the UE 100 (control unit 133) randomly selects the resource from the selected resource region. The UE 100 (communication processing unit 135) uses the selected resource to transmit the data and the control information on the sidelink.

Referring to the example of FIG. 8 , UE 100 (control unit 133) selects resource 71 included in resource region 61 . Then, the UE 100 (the communication processing unit 135) uses the resource 71 to transmit the data and the control information on the sidelink.

- Transmission For example, the UE 100 (communication processing unit 135) transmits the data and the control information to another UE on the sidelink. That is, the UE 100 (communication processing unit 135) transmits the data and the control information by unicast or groupcast. Referring to the example of FIG. 2, the other UE is UE 30, for example.

For example, the UE 100 (communication processing unit 135) transmits the data on a physical sidelink shared channel (PSSCH).

For example, when the control information is the first stage SCI, the UE 100 (communication processing unit 135) transmits the control information on the physical sidelink control channel (PSCCH). When the control information is the second stage SCI, the UE 100 (communication processing unit 135) transmits the control information together with the data on the PSSCH. When the control information includes both the first stage SCI and the second stage SCI, the UE 100 (communication processing unit 135) transmits the control information on PSCCH and PSSCH.

In addition, referring to the example of FIG. 2 again, for example, the data transmitted by the UE 100 is received by the UE 30 and transmitted by the UE 30 to the UE 100 .

(4) Data Transfer by UE 200 - Reception of Data and Control Information The UE 200 (communication processing unit 235) receives the above data and control information from other UEs on the sidelink.

Referring again to the example of FIG. 2, the other UE is UE 30, for example. As described above, for example, the data transmitted by UE100 is received by UE30 and transmitted by UE30 to UE100. UE100 (communication processing unit 235) receives the data from UE30.

- Control information For example, the control information is SCI. The control information may be the first stage SCI or the second stage SCI. Alternatively, the control information may include both the first stage SCI and the second stage SCI.

Among other things, the control information includes hop-related information related to the number of hops of the data. For example, the hop-related information indicates the hop count of the data.

Referring again to the example of FIG. 2, for example, UE 30 first transfers the data. That is, the UE 30 performs first-hop transfer. Therefore, the hop-related information transmitted by the UE 30 indicates 1 as the hop count of the data.

- Selection of resource area Based on the hop-related information, the UE 200 (control unit 233) selects a resource area that is included in the resource pool and that can be used for transferring the data. The resource area is one of the plurality of resource pools,

For example, the resource area that can be used for transferring the data is a resource area corresponding to a hop number next to the hop number among the plurality of resource areas. For example, the next hop number is one greater than the hop number. That is, the next hop number is the incremented hop number.

As described above with reference to the example of FIG. 2, the hop-related information indicates 1 as the hop number and 2 as the next hop number. Therefore, UE 200 (control unit 233) selects a resource region corresponding to 2 hops. Referring to the example of FIG. 7 again, UE 200 (control unit 233) selects resource region 65 corresponding to hop count 2 as a resource region that can be used for transferring the data.

This may reduce the likelihood that sidelink transmissions with a small number of hops will collide with other sidelink transmissions when multi-hop communication occurs on the sidelink.

- Transmission of data and other control information For example, the UE 200 (communication processing unit 235) uses the resources included in the selected resource region to transmit the data and other control information on the sidelink.

- Other control information For example, the other control information is SCI. The other control information may be the first stage SCI or the second stage SCI. Alternatively, the other control information may include both the first stage SCI and the second stage SCI.

In particular, UE 200 (control unit 233) generates other hop-related information related to the number of hops next to the number of hops based on the hop-related information. The other control information includes the other hop related information.

For example, the other hop related information indicates the number of next hops. As described above, for example, the hop-related information indicates the hop number of the data, for example, the next hop number is one greater than the hop number. As described above with reference to the example of FIG. 2, the hop-related information indicates 1 as the hop number and 2 as the next hop number. Therefore, the other hop-related information indicates 2 as the next hop count.

With the other hop related information, for example, a UE receiving the data and the other control information can know the number of hops of the data.

-Resource For example, the UE 200 (control unit 233) selects the resource included in the selected resource region.

For example, the UE 200 (control unit 233) randomly selects the resource from the selected resource region. The UE 200 (communication processing unit 235) uses the selected resource to transmit the data and the other control information on the sidelink.

Referring to the example of FIG. 9 , UE 200 (control unit 233) selects resource 73 included in selected resource region 65 . Then, the UE 200 (the communication processing unit 235) uses the resource 73 to transmit the data and the other control information on the sidelink.

-Transmission For example, the UE 200 (communication processing unit 235) transmits the data and the other control information to another UE on the sidelink. That is, the UE 200 (communication processing unit 235) transmits the data and the other control information by unicast or groupcast. Referring to the example of FIG. 2, the other UE is UE 40, for example.

For example, UE 200 (communication processing unit 235) transmits the above data on PSSCH.

For example, when the other control information is the first stage SCI, the UE 200 (communication processing unit 235) transmits the other control information on PSCCH. When the other control information is the second stage SCI, the UE 200 (communication processing unit 235) transmits the other control information together with the data on the PSSCH. When the other control information includes both the first stage SCI and the second stage SCI, UE 200 (communication processing section 235) transmits the other control information on PSCCH and PSSCH.

(5) Transfer stop For example, when none of the one or more transfer stop conditions are met, the UE 200 (communication processing unit 235) transmits the data and the other control information on the sidelink as described above. .

On the other hand, the UE 200 (communication processing unit 235) does not transmit the data and the other control information on the sidelink when any one of the one or more transfer stop conditions is satisfied. That is, the transfer of the data is stopped by the UE 200 .

For example, the UE 200 (control unit 233) determines whether any one of the one or more transfer stop conditions is satisfied.

- first stop forwarding condition: number of hops For example, one of the one or more stop forwarding conditions (hereinafter referred to as "first stop forwarding condition") is the number of hops or the number of next hops is a predetermined number of hops corresponding to the prohibition of forwarding. That is, when the number of hops in multi-hop communication reaches a specific number, the data transfer is stopped.

For example, the first transfer stop condition is that the next hop count is the predetermined hop count. As an example, the predetermined number of hops is four. That is, when the next hop count is 4, the UE 200 does not transmit the data and the other control information on the sidelink.

Referring to the example of FIG. 2, in UE 200, the number of next hops is 2, so the first transfer stop condition is not satisfied. Also, the UE 40 does not satisfy the first stop condition. The UE that transfers the data next to the UE 40 satisfies the first stop condition.

The first transfer stop condition may be that the number of hops is the predetermined number of hops, and in this case, the predetermined number of hops may be three.

The number of hops in multi-hop communication can be limited by the first transfer stop condition. As such, collisions of large hop count sidelink transmissions may be avoided.

For example, the configuration information of the plurality of resource regions includes information indicating the predetermined number of hops corresponding to prohibition of forwarding.

- second stop forwarding condition: resource region For example, one of the one or more stop forwarding conditions (hereinafter referred to as "second stop forwarding condition") is a predetermined condition based on the hop-related information. It is impossible to select a resource area larger than the size. That is, when a resource area of sufficient size cannot be secured, the transfer of the data is stopped.

Referring to the example of FIG. 7, for example, the predetermined size is the size of the resource area 67, and the second transfer stop condition is that even the resource area 67 cannot be selected. In other words, the second transfer stop condition is that none of the plurality of resources (resource areas 61 to 67) can be selected.

As described above with reference to the example of FIG. 2, UE 200 selects resource region 65, so the second transfer stop condition is not met. Note that the UE 40 also does not satisfy the second stop condition. The UE that transfers the data next to the UE 40 satisfies the second stop condition.

For example, the configuration information of the plurality of resource regions includes information indicating the predetermined size (or resource regions having the predetermined size).

Due to the second stop forwarding condition, multiple collisions within a small resource region can be avoided.

- Third transfer stop condition: duration For example, one of the one or more transfer stop conditions (hereinafter referred to as "third transfer stop condition") is that the duration of the data is a predetermined period. is to exceed That is, if the data persists for a long period of time, the transfer of the data is stopped.

For example, the control information and the other control information include information indicating the duration of the data. Furthermore, for example, the configuration information of the plurality of resource regions includes information indicating the predetermined period. UE 200 (control unit 233) determines whether the duration exceeds the predetermined period.

The transfer of the data for a long period of time can be avoided by the third transfer stop condition. As a result, sidelink transmission collisions may be reduced.

(6) Flow of Processing An example of processing according to the embodiment of the present disclosure will be described with reference to FIGS. 10 and 11. FIG.

- Processing of UE 100 An example of processing of the UE 100 according to the embodiment of the present disclosure will be described with reference to FIG.

The UE 100 (information acquisition unit 131) acquires data transferred on the sidelink using resources included in the resource pool for the sidelink (S310).

The UE 100 (information acquisition unit 131) acquires control information including hop-related information related to the number of hops of the data (S320).

The UE 100 (control unit 133) selects resources included in the resource pool (S330).

The UE 100 uses the resource to transmit the data and the control information on the sidelink (S340).

- Processing of UE 200 An example of processing of the UE 200 according to the embodiment of the present disclosure will be described with reference to FIG.

UE 200 (communication processing unit 235), data transferred on the sidelink using resources included in the resource pool for the sidelink, control information including hop-related information related to the number of hops of the data, It is received on the sidelink from another UE (S410).

Based on the hop-related information, the UE 200 (control unit 233) selects a resource area that is included in the resource pool and that can be used for transferring the data (S420).

The UE 200 (control unit 233) determines whether one or more transfer stop conditions are satisfied (S430). If none of the above one or more transfer stop conditions are satisfied (S430: NO), the process proceeds to step S440. If any of the above one or more transfer stop conditions are satisfied (S430: YES), the process ends.

The UE 200 (control unit 233) selects resources included in the selected resource region (S440).

The UE 200 (communication processing unit 235) uses the resource to transmit the data and other control information on the sidelink (S450).

<5. Variation>
First to twelfth modifications according to the embodiment of the present disclosure will be described with reference to FIGS. 12 to 17. FIG.

(1) First Modification: Resource Area In the above-described example of the embodiment of the present invention, as described with reference to the example of FIG. Overlaps with at least one other resource region included. However, the plurality of resource regions according to embodiments of the present disclosure are not limited to this example.

In the first modification of the embodiment of the present disclosure, each of the plurality of resource regions may not overlap any other resource regions included in the plurality of resource regions.

Referring to the example of FIG. 12, resource pool 50 is shown. Resource pool 50 may include resource region 81 corresponding to hop 0, resource region 83 corresponding to hop 1, resource region 85 corresponding to hop 2, and resource region 87 corresponding to hop 3. Resource regions 81-87 may not overlap with any other resource region. The size of resource region 83 may be half the size of resource region 81 and the size of resource region 85 may be half the size of resource region 83 . The size of resource region 87 may be a quarter of the size of resource region 85 . That is, the size reduction rate from resource region 85 to resource region 87 (ie, 75% reduction) may be greater than the size reduction rate from resource region 83 to resource region 85 (ie, 50% reduction).

Referring to the example of FIG. 13 , UE 100 (control unit 133) may select resource 91 included in resource region 81. Then, the UE 100 (the communication processing unit 135) may use the resource 91 to transmit the data and the control information on the sidelink.

Referring to the example of FIG. 14 , UE 200 (control unit 233) may select resource 93 included in selected resource region 85 . Then, the UE 200 (the communication processing unit 235) may use the resource 93 to transmit the data and the other control information on the sidelink.

This can prevent, for example, sidelink transmissions with a small number of hops from colliding with sidelink transmissions with a large number of hops.

(2) Second Modification: Hop-Related Information In the above-described example of the embodiment of the present invention, the UE 200 (control unit 233) uses the following hop count as the resource area that can be used for transferring the data. Select a resource region that corresponds to the number of hops. However, hop-related information according to embodiments of the present disclosure is not limited to this example.

In a second modification of the embodiment of the present disclosure, UE 200 (control unit 233) may select a resource region corresponding to the hop count (not the hop count next to the hop count).

In this case, the hop-related information transmitted by the UE 100 may indicate, as the hop number of the data, the hop number for another UE (eg, UE 30) that receives the data from the UE 100. That is, the hop-related information transmitted by the UE 100 may indicate 1 instead of 0 as the hop count of the data.

Referring again to the example of FIG. 2, the hop-related information transmitted by the UE 100 may indicate 1 as the hop number of the data. Furthermore, the hop-related information transmitted by the UE 30 may indicate 2 as the number of hops for the data. The UE 100 may select resource regions corresponding to the number of hops (ie, 2) indicated by the hop-related information transmitted by the UE 30 .

(3) Third Modification: Hop-Related Information In the above-described example of the embodiment of the present invention, the hop-related information indicates the number of hops of the data. However, hop-related information according to embodiments of the present disclosure is not limited to this example.

In a third modified example of the embodiment of the present disclosure, the hop-related information may indicate a resource area corresponding to the hop count among the plurality of resource areas.

As an example, the plurality of resource regions may correspond to different indices. The hop related information may indicate an index of one of the plurality of resource regions. Referring again to the example of FIG. 7, resource regions 61, 63, 65, 67 may correspond to indices 0, 1, 2, 3, respectively. In this case, the hop-related information received by UE 200 may indicate index 1 . The UE 200 (control unit 233) may select the resource region 65 corresponding to the index next to index 1 (that is, index 2). The other hop related information sent by UE 200 may indicate the next index (ie, index 2).

(4) Fourth Modification: Broadcast In the above-described example of the embodiment of the present invention, UE 200 (communication processing unit 235) transmits the data and other control information by unicast or groupcast. However, sidelink transmission according to embodiments of the present disclosure is not limited to this example.

In a fourth modification of the embodiment of the present disclosure, the UE 200 (the communication processing unit 235) may broadcast the data and the other control information on the sidelink. Thus, for example, due to limited resource usage, many UEs may receive the data. Also, no acknowledgment (ACK) is sent on the sidelink, and sidelink resources may be saved.

-First example As a first example, the UE 200 (communication processing unit 235) does not use unicast or groupcast when transmitting the data and the other control information, but uses only broadcast. may

-Second example As a second example, the UE 200 (communication processing unit 235), when the next hop count (or the hop count) is a predetermined hop count corresponding to broadcast, the data and the Other control information may be broadcast on the sidelink.

As an example, the predetermined number of hops may be three. That is, the UE 200 may broadcast the data and the other control information when the next hop count is 3.

Referring to the example of FIG. 2, in the UE 200, the number of next hops is 2, so the UE 200 may transmit the data and the other control information by unicast or groupcast.

This allows many UEs to receive the data, for example, due to limited resource usage in a small resource area. Also, transmission of ACKs by a large number of UEs may be avoided.

(5) Fifth Modification: Hop Count Exception In the above-described example of the embodiment of the present invention, the hop count next to the hop count is one greater than the hop count. However, the number of next hops according to embodiments of the present disclosure is not limited to this example.

In a fifth modification of the embodiment of the present disclosure, the UE 200 may be a specific type of UE, in which case the next hop count of the hop count may be less than or equal to the hop count. good. For example, the particular type of UE may be an RSU. This can, for example, increase the distance over which such data is propagated by certain types of UEs (eg, RSUs). It also allows certain types of UEs (eg, RSUs) to use large resource regions.

For example, the next hop count may be equal to or less than the hop count when the control information includes a predetermined flag, and the hop count when the control information does not include the predetermined flag. may be one greater than This can, for example, increase the distance over which certain data is propagated by certain types of UEs (eg, RSUs). As an example, the flag may be 1-bit information with a value of 1. Alternatively, the flag may be 1-bit information with a value of 0.

- First Example As a first example, the number of next hops may be the same as the number of hops. That is, hops by certain types of UEs (eg, RSUs) may not be counted in the hop count.

Referring to the example of FIG. 15, UE100 may be an RSU placed at a first intersection, and UE200 may be an RSU placed at a second intersection close to the first intersection. . UE200 may receive data and control information transmitted by UE100. The hop-related information included in the control information may indicate 0 as the hop count of the data. In UE 200, the number of hops next to the number of hops may be the same as the number of hops. That is, in the UE 200, the next hop count may remain zero. As such, the UE 200 may select the resource region 61 shown in FIG. 7 and may use the resources contained in the resource region 61 to transmit said data and other control information. The other control information may include other hop related information related to the next hop number (ie 0).

Thereby, for example, data regarding one of two nearby intersections can be propagated to the vicinity of the two intersections.

- Second example As a second example, the number of next hops may be smaller than the number of hops. That is, the number of hops may be reduced for certain types of UEs (eg, RSUs).

Referring to the example of FIG. 16, UE100 and UE200 may be RSUs. UE30 may transmit the data received from UE100 and control information to UE200. The hop-related information included in the control information may indicate 1 as the hop count of the data. In UE 200, the number of hops next to the number of hops may be zero. That is, in the UE 200, the next hop count may be reset. As such, the UE 200 may select the resource region 61 shown in FIG. 7 and may use the resources contained in the resource region 61 to transmit the data and other control information. The other control information may include other hop related information related to the next hop number (ie 0).

This allows, for example, RSUs to be used to propagate emergency information (eg, accident information) over long distances.

(6) Sixth Modification: Data Transfer In a sixth modification, the UE 200 (communication processing unit 235) may transmit the data only once. That is, the UE 200 (communication processing unit 235) may not transmit the data more than once.

For example, the control information transmitted by UE100, the control information received by UE200, and the other control information transmitted by UE200 may include identification information of the data.

The UE 200 may store the identification information of the data even after transmitting the data. If the identification information of data received by the UE 200 thereafter matches the stored identification information, the UE 200 may not forward the data received by the UE 200 .

This makes it possible, for example, to avoid repeated transfers of the same data by the same UE.

(7) Seventh Modification: Configuration of Resource Regions In the above-described example of the embodiment of the present invention, the plurality of resource regions are configured by the base station. That is, the configuration information of the plurality of resource regions is transmitted by the base station. UE 100 (communication processing unit 135) and UE 200 (communication processing unit 235) receive the configuration information. However, the configuration of the resource area according to the embodiment of the present disclosure is not limited to this example.

In a seventh modification of the embodiment of the present disclosure, the multiple resource regions may be configured by the UE 100. That is, the UE 100 (the control unit 133) may determine the plurality of resource regions, and the UE 100 (the communication processing unit 135) may transmit the configuration information of the plurality of resource regions on the sidelink. The UE 200 (communication processing unit 235) may receive the configuration information of the plurality of resource regions via sidelinks.

- Predetermined number of hops The UE 100 (control unit 133) may determine the predetermined number of hops corresponding to the prohibition of forwarding, and the configuration information includes information indicating the predetermined number of hops corresponding to the prohibition of forwarding. It's okay.

The UE 100 (control unit 133) may determine the predetermined number of hops corresponding to broadcasting, and the configuration information may include information indicating the predetermined number of hops corresponding to broadcasting.

-Transmission--First example: RRC message As a first example, the above configuration information may be included in an RRC message.

The UE 100 (communication processing unit 135) may transmit the RRC message including the above configuration information on the sidelink. The RRC message may be forwarded in multiple hops.

The UE 200 (communication processing unit 235) may receive the RRC message including the configuration information on the sidelink.

--Second Example: Control Information As a second example, the configuration information may be included in the control information (eg, SCI).

The UE 100 (communication processing unit 135) may transmit the data and the control information (for example, SCI) including the configuration information on the sidelink.

The UE 200 (communication processing unit 235) may receive the data and the control information (for example, SCI) including the configuration information on the sidelink.

This enables, for example, the UE 100 to individually control multi-hop communication.

(8) Eighth Modification: Configuration of Resource Regions In the above-described example of the embodiment of the present invention, the plurality of resource regions are configured by the base station. In the seventh modification of the embodiment of the present invention, the plurality of resource regions are configured by UE100. However, the configuration of the resource area according to the embodiment of the present disclosure is not limited to this example.

In an eighth modification of the embodiment of the present disclosure, the plurality of resource regions may be preconfigured. UE100 and UE200 may store configuration information of the plurality of resource regions in advance. UE30 and UE40 may also store configuration information of the plurality of resource regions in advance.

This eliminates the need for signaling for sharing configuration information, for example.

(9) Ninth Modification: Configuration of Resource Areas As described above, in the seventh modification of the embodiment of the present invention, the plurality of resource areas are configured by the UE 100 . The UE 100 (communication processing unit 135) transmits the configuration information of the plurality of resource regions via sidelinks.

Especially in the ninth variant of the embodiment of the present invention, said configuration information of said plurality of resources may indicate said plurality of resource regions according to a resource region size subtraction policy.

Referring to the example of FIG. 17, configuration information of the plurality of resources is shown in a table format. Specifically, forwarding and subtraction policies corresponding to each hop number are shown. A subtraction policy for hop 1 and hop 2 may be to subtract the size of the resource region by a factor of two. The subtraction policy for hop 3 may be to subtract the resource region size by a factor of four. Thus, by subtracting the size of hop 0 resource region 61 by one half, hop 1 resource region 63 may be obtained, as shown in the example of FIG. Alternatively, the resource region 65 for hop 2 may be obtained by subtracting the size of the resource region 63 for hop 1 by half. Further, by subtracting the size of hop 2 resource region 65 by 1/4, hop 3 resource region 67 may be obtained. The 1-hop transfer and the 2-hop transfer may be unicast or groupcast, and the 3-hop transfer may be broadcast. Four-hop forwarding may be prohibited.

In addition to the subtraction policy, the configuration information may include information on a technique for specifying the position of the resource area after subtraction. Alternatively, the method may be predefined.

(10) Tenth Modification: Resource Pool Configuration In the above-described example of the embodiment of the present invention, the resource pool is configured by the base station. That is, the resource pool configuration information is transmitted by the base station. UE 100 (communication processing unit 135) and UE 200 (communication processing unit 235) receive the configuration information. However, the configuration of the resource pool according to the embodiment of the present disclosure is not limited to this example.

In a tenth modification of the embodiment of the present disclosure, the resource pool may be configured by the UE 100. That is, the UE 100 (control unit 133) may determine the resource pool, and the UE 100 (communication processing unit 135) may transmit the resource pool configuration information on the sidelink. The UE 200 (communication processing unit 235) may receive the configuration information of the resource pool on the sidelink.

- First example: RRC message As a first example, the above configuration information may be included in an RRC message.

The UE 100 (communication processing unit 135) may transmit the RRC message including the above configuration information on the sidelink. The RRC message may be forwarded in multiple hops.

The UE 200 (communication processing unit 235) may receive the RRC message including the configuration information on the sidelink.

- Second Example: Control Information As a second example, the configuration information may be included in the control information (eg, SCI).

The UE 100 (communication processing unit 135) may transmit the data and the control information (for example, SCI) including the configuration information on the sidelink.

The UE 200 (communication processing unit 235) may receive the data and the control information (for example, SCI) including the configuration information on the sidelink.

This allows, for example, the UE 100 to individually control the resource pool itself.

(11) Eleventh Modification: Detection of Interference or UE In the seventh modification of the embodiment of the present invention, the plurality of resource regions are configured by UEs 100 . In the tenth modification of the embodiment of the present invention, the resource pool is configured by UE100.

Especially in the eleventh modification of the embodiment of the present disclosure, the UE 100 may configure the plurality of resource regions or the resource pool based on interference or UE detection results.

The UE 100 (communication processing unit 135) may detect interference in the resource pool. In particular, UE 100 (communication processing unit 135) may detect interference from UEs that are RSUs.

The UE 100 (the communication processing unit 135) may detect UEs located around the UE 100. In particular, the UE 100 (communication processing unit 135) may detect a UE mounted on a vehicle, and thereby the UE 100 (communication processing unit 135) may substantially detect the vehicle.

- Multiple resource regions The multiple resource regions may be determined based on interference or UE detection results. That is, the UE 100 (control unit 133) may determine the plurality of resource regions based on interference or UE detection results.

Specifically, the plurality of resource regions may include a first resource region corresponding to the number of hops N and a second resource region corresponding to the number of hops N+1. N may be any integer greater than or equal to 0. The size reduction ratio from the first resource region to the second resource region may be determined based on interference or UE detection results.

For example, when interference from RSUs is detected, the size reduction rate may be larger. That is, the resource region corresponding to a large number of hops may become smaller. This may, for example, reduce interference to other RSUs due to multi-hop communications.

For example, when a large number of UEs (ie a large number of vehicles) are detected, the size reduction rate may be large. That is, the resource region corresponding to a large number of hops may become smaller. This may, for example, save a large number of UEs from using a lot of resources.

- Predetermined Number of Hops for Forwarding Prohibition The predetermined number of hops for forwarding prohibition may also be determined based on interference or UE detection results. That is, the UE 100 (control unit 133) may also determine the predetermined number of hops corresponding to transfer prohibition based on the result of interference or UE detection.

For example, the predetermined number of hops may be reduced when interference from RSUs is detected. That is, the maximum number of hops in multihop communication may be reduced. This may, for example, reduce interference to other RSUs due to multi-hop communications.

For example, if a large number of UEs (ie a large number of vehicles) are detected, the predetermined number of hops may be reduced. That is, the maximum number of hops in multihop communication may be reduced. This may, for example, save a large number of UEs from using a lot of resources.

- Resource pool The resource pool may be determined based on interference or UE detection results. Namely
The UE 100 (control unit 133) may determine the resource pool based on interference or UE detection results.

For example, the resource pool may be reduced when interference from RSUs is detected. This may, for example, reduce interference to other RSUs due to multi-hop communications.

For example, the resource pool may grow when a large number of UEs (ie a large number of vehicles) are detected. This may, for example, reduce interference among multiple UEs.

- Hop-related information The UE 100 (control unit 133) may generate the hop-related information based on interference or UE detection results. For example, the UE 100 may generate hop-related information indicating a hop count greater than 0 according to the above detection result.

(12) Twelfth Modification: System In the above-described examples of the embodiments of the present disclosure, UE100, UE200, UE30, and UE40 are UEs conforming to 5G or NR TS. However, the UE100, UE200, UE30, and UE40 according to the embodiments of the present disclosure are not limited to this example.

In a ninth modification of the embodiment of the present disclosure, UE100, UE200, UE30 and UE40 may be UEs conforming to other 3GPP TSs. As an example, UE100, UE200, UE30, and UE40 may be UEs conforming to LTE (Long Term Evolution), LTE-A (LTE Advanced), or 4G TS. As another example, UE100, UE200, UE30 and UE40 may be 3G TS compliant UEs. As yet another example, UE100, UE200, UE30, and UE40 may be next-generation (eg, 6G) TS-compliant UEs.

Alternatively, UE100, UE200, UE30, and UE40 may be UEs conforming to the TS of other standardization bodies for mobile communications.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments. Those skilled in the art will appreciate that the embodiments are illustrative only and that various modifications are possible without departing from the scope and spirit of the disclosure.

For example, the steps in the processes described herein need not necessarily be executed in chronological order according to the order described in the flowcharts or sequence diagrams. For example, steps in a process may be performed in an order different from that depicted in a flowchart or sequence diagram, or in parallel. Also, some of the steps in the process may be deleted and additional steps may be added to the process.

For example, a method may be provided that includes the operation of one or more components of the apparatus described herein, and a program may be provided to cause a computer to perform the operation of the components. Further, a computer-readable non-transitional tangible recording medium recording the program may be provided. Of course, such methods, programs, and non-transitory tangible computer-readable storage media are also included in the present disclosure.

For example, in this disclosure user equipment (UE) refers to a mobile station, mobile terminal, mobile device, mobile unit, subscriber station, subscriber terminal, subscriber equipment, subscriber unit, wireless It may also be called a station, a wireless terminal, a wireless device, a wireless unit, a remote station, a remote terminal, a remote device, a remote unit, or the like.

For example, in this disclosure, "transmit" may mean performing at least one layer of processing within the protocol stack used for transmission, or physically transmitting a signal wirelessly or by wire. It may mean sending to Alternatively, "transmitting" may mean a combination of performing the at least one layer of processing and physically transmitting the signal wirelessly or by wire. Similarly, "receive" may mean processing at least one layer in the protocol stack used for reception, or physically receiving a signal wirelessly or by wire. may mean that Alternatively, "receiving" may mean a combination of performing the at least one layer of processing and physically receiving the signal wirelessly or by wire.

For example, in the present disclosure, "forward" may be translated as "relay." For example, in this disclosure, "data" may be interchanged with "packets" or "packet data units (PDUs)."

For example, in this disclosure, "obtain/acquire" may mean obtaining information among stored information, obtaining information among information received from other nodes. or to obtain the information by generating the information.

For example, in this disclosure, the terms "include" and "comprise" do not mean to include only the recited items, but may include only the recited items, or may include only the recited items. It means that further items may be included in addition to the

For example, in the present disclosure, "or" does not mean exclusive OR, but means logical OR.

Note that the technical features included in the above-described embodiments may be expressed as the following features. Of course, the disclosure is not limited to the following features.

(Feature 1)
A user equipment (200),
Data transferred on the sidelink using resources included in the resource pool (50) for the sidelink and control information including hop-related information related to the number of hops of the data are transferred from the other user equipment to the sidelink. a communication processing unit (235) that receives via a link;
a control unit (233) that selects, based on the hop-related information, a resource area that is included in the resource pool and that can be used for transferring the data;
with
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
a larger resource region of the plurality of resource regions corresponds to a smaller number of hops, a smaller resource region of the plurality of resource regions corresponds to a larger number of hops;
the resource area available for transferring the data is one of the plurality of resource pools;
User equipment.

(Feature 2)
The user equipment of feature 1, wherein each of said plurality of resource regions overlaps with at least one other resource region included in said plurality of resource regions.

(Feature 3)
The user equipment of feature 1, wherein each of the plurality of resource regions does not overlap any other resource region included in the plurality of resource regions.

(Feature 4)
The plurality of resource regions includes a first resource region corresponding to the number of hops M, a second resource region corresponding to the number of hops M+1, and a third resource region corresponding to the number of hops M+2;
a size reduction rate from the second resource region to the third resource region is greater than a size reduction rate from the first resource region to the second resource region;
M is any integer greater than or equal to 0;
A user equipment according to any one of features 1-3.

(Feature 5)
The plurality of resource regions includes a first resource region corresponding to the number of hops N and a second resource region corresponding to the number of hops N+1;
the size reduction rate from the first resource region to the second resource region is a size reduction rate determined based on interference or user equipment detection results;
N is any integer greater than or equal to 0;
User equipment according to any one of the features 1-4.

(Feature 6)
6. Any one of characteristics 1 to 5, wherein the resource area available for transferring the data is a resource area corresponding to the number of hops next to the number of hops or the number of hops among the plurality of resource areas. User equipment as described in

(Feature 7)
A user equipment according to any one of the preceding claims, wherein said hop related information indicates said number of hops of said data.

(Feature 8)
The user equipment according to any one of the preceding claims, wherein said hop-related information indicates a resource region corresponding to said number of hops among said plurality of resource regions.

(Feature 9)
A user equipment according to any one of the preceding claims, wherein the communication processing unit is configured to transmit the data and other control information on a sidelink using resources contained in the selected resource region.

(Feature 10)
10. The user equipment of feature 9, wherein the communication processing unit transmits the data on a physical sidelink shared channel (PSSCH).

(Feature 11)
11. The user equipment of feature 9 or 10, wherein said other control information is sidelink control information (SCI).

(Feature 12)
The user device according to any one of features 9 to 11, wherein the communication processing unit transmits the data and the other control information to another user device via a sidelink.

(Feature 13)
When the number of hops next to the number of hops or the number of hops is a predetermined number of hops corresponding to broadcasting, the communication processing unit broadcasts the data and the other control information on a sidelink. A user equipment according to any one of claims 9-12.

(Feature 14)
The communication processing unit is
transmitting the data and the other control information on the sidelink if none of the one or more transfer stop conditions are met;
not transmitting the data and the other control information on the sidelink if any of the one or more stop forwarding conditions are met;
User equipment according to any one of features 9-13.

(Feature 15)
15. The user of feature 14, wherein one of the one or more stop forwarding conditions is that the number of hops or the number of hops next to the number of hops is a predetermined number of hops corresponding to prohibiting forwarding. machine.

(Feature 16)
16. The user equipment of feature 15, wherein the predetermined number of hops is a number determined based on interference or user equipment detection results.

(Feature 17)
17. The user equipment according to any one of features 14-16, wherein one of said one or more forwarding stop conditions is an inability to select a resource region greater than or equal to a predetermined size based on said hop related information. .

(Feature 18)
18. The user equipment of any one of features 14-17, wherein one of said one or more transfer stop conditions is that the lifetime of said data exceeds a predetermined period of time.

(Feature 19)
The control unit generates other hop-related information related to the number of hops next to the number of hops based on the hop-related information,
the other control information includes the other hop-related information;
User equipment according to any one of the features 9-18.

(Feature 20)
20. The user equipment according to any one of features 6, 13, 15 and 19, wherein said next hop number is one greater than said hop number.

(Feature 21)
the user equipment is a particular type of user equipment,
the number of next hops is less than or equal to the number of hops;
20. User equipment according to any one of features 6, 13, 15 and 19.

(Feature 22)
Said next hop number is
when the control information includes a predetermined flag, the number of hops is less than or equal to the number of hops;
when the control information does not include the predetermined flag, the number of hops is greater by 1;
22. The user equipment of feature 21.

(Feature 23)
23. The user equipment of feature 21 or 22, wherein the particular type of user equipment is a roadside unit (RSU).

(Feature 24)
The user equipment according to any one of the features 1-23, wherein the communication processing unit receives configuration information of the plurality of resource regions.

(Feature 25)
25. The user equipment of feature 24, wherein the configuration information is included in the control information.

(Feature 26)
26. The user equipment according to any one of the features 1-25, wherein the communication processing unit receives configuration information of the resource pool.

(Feature 27)
27. The user equipment according to any one of the preceding characteristics, wherein said resource pool is a resource pool based on interference or user equipment detection results.

(Feature 28)
28. The user equipment according to any one of the preceding claims, wherein said control information is sidelink control information (SCI).

(Feature 29)
A user equipment (100),
An information acquisition unit (131 )When,
A communication processing unit (135) that transmits the data and the control information on a sidelink using resources included in the resource pool;
with
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
A larger resource area of the plurality of resource areas corresponds to a smaller number of hops, and a smaller resource area of the plurality of resource areas corresponds to a larger number of hops.
User equipment.

(Feature 30)
Further comprising a control unit (133) that determines the plurality of resource regions,
wherein the communication processing unit transmits configuration information of the plurality of resource areas via a sidelink;
User equipment according to feature 29.

(Feature 31)
31. The user equipment of feature 30, wherein the configuration information includes information indicating a predetermined number of hops corresponding to a forwarding prohibition.

(Feature 32)
32. A user equipment according to feature 30 or 31, wherein said configuration information comprises information indicating a predetermined number of hops corresponding to a broadcast.

(Feature 33)
The user equipment according to any one of the characteristics 30-32, wherein the controller determines the plurality of resource regions based on interference or user equipment detection results.

(Feature 34)
The user equipment according to any one of features 29 to 33, wherein the communication processing unit transmits the resource pool configuration information on a sidelink.

(Feature 35)
35. User equipment according to characteristic 34, further comprising a control unit (133) for determining said resource pool based on interference or user equipment detection results.

(Feature 36)
36. The user equipment according to any one of features 30-35, wherein said control information comprises said configuration information.

(Feature 37)
The user equipment according to any one of the characteristics 29-36, further comprising a control unit (133) for generating said hop related information based on interference or user equipment detection results.

(Feature 38)
A method performed by a user equipment (200), comprising:
Data transferred on the sidelink using resources included in the resource pool (50) for the sidelink and control information including hop-related information related to the number of hops of the data are transferred from the other user equipment to the sidelink. to receive the link; and
selecting, based on the hop-related information, a resource area included in the resource pool that can be used for transferring the data;
including
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
a larger resource region of the plurality of resource regions corresponds to a smaller number of hops, a smaller resource region of the plurality of resource regions corresponds to a larger number of hops;
the resource area available for transferring the data is one of the plurality of resource pools;
Method.

(Feature 39)
A method performed by a user equipment (100), comprising:
Acquiring data transferred on the sidelink using resources included in the resource pool (50) for the sidelink and control information including hop-related information related to the number of hops of the data;
transmitting the data and the control information on a sidelink using resources included in the resource pool;
including
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
A larger resource area of the plurality of resource areas corresponds to a smaller number of hops, and a smaller resource area of the plurality of resource areas corresponds to a larger number of hops.
Method.

(Feature 40)
Data transferred on the sidelink using resources included in the resource pool (50) for the sidelink and control information including hop-related information related to the number of hops of the data are transferred from the other user equipment to the sidelink. to receive the link; and
selecting, based on the hop-related information, a resource area included in the resource pool that can be used for transferring the data;
is a program that causes a computer to execute
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
a larger resource region of the plurality of resource regions corresponds to a smaller number of hops, a smaller resource region of the plurality of resource regions corresponds to a larger number of hops;
the resource area available for transferring the data is one of the plurality of resource pools;
program.

(Feature 41)
Acquiring data transferred on the sidelink using resources included in the resource pool (50) for the sidelink and control information including hop-related information related to the number of hops of the data;
transmitting the data and the control information on a sidelink using resources included in the resource pool;
is a program that causes a computer to execute
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
A larger resource area of the plurality of resource areas corresponds to a smaller number of hops, and a smaller resource area of the plurality of resource areas corresponds to a larger number of hops.
program.

(Feature 42)
Data transferred on the sidelink using resources included in the resource pool (50) for the sidelink and control information including hop-related information related to the number of hops of the data are transferred from the other user equipment to the sidelink. to receive the link; and
selecting, based on the hop-related information, a resource area included in the resource pool that can be used for transferring the data;
A computer-readable non-transitional tangible recording medium that records a program that causes a computer to execute
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
a larger resource region of the plurality of resource regions corresponds to a smaller number of hops, a smaller resource region of the plurality of resource regions corresponds to a larger number of hops;
the resource area available for transferring the data is one of the plurality of resource pools;
Computer-readable non-transitional tangible recording medium.

(Feature 43)
Acquiring data transferred on the sidelink using resources included in the resource pool (50) for the sidelink and control information including hop-related information related to the number of hops of the data;
transmitting the data and the control information on a sidelink using resources included in the resource pool;
A computer-readable non-transitional tangible recording medium that records a program that causes a computer to execute
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
A larger resource area of the plurality of resource areas corresponds to a smaller number of hops, and a smaller resource area of the plurality of resource areas corresponds to a larger number of hops.
Computer-readable non-transitional tangible recording medium.

1 system 21, 31, 41 vehicle 30, 40 user equipment (UE)
50 resource pools 61, 63, 65, 67, 81, 83, 85, 87 resource regions 71, 73, 91, 93 resources 100 user equipment (UE)
131 information acquisition unit 133 control unit 135 communication processing unit 200 user equipment (UE)
231 information acquisition unit 233 control unit 235 communication processing unit

Claims (15)

A user equipment (200),
Data transferred on the sidelink using resources included in the resource pool (50) for the sidelink and control information including hop-related information related to the number of hops of the data are transferred from the other user equipment to the sidelink. a communication processing unit (235) that receives via a link;
a control unit (233) that selects, based on the hop-related information, a resource area that is included in the resource pool and that can be used for transferring the data;
with
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
a larger resource region of the plurality of resource regions corresponds to a smaller number of hops, a smaller resource region of the plurality of resource regions corresponds to a larger number of hops;
the resource area available for transferring the data is one of the plurality of resource pools;
User equipment. 2. The user equipment of claim 1, wherein each of said plurality of resource regions overlaps with at least one other resource region included in said plurality of resource regions. 2. The user equipment of claim 1, wherein each of said plurality of resource regions does not overlap with any other resource region included in said plurality of resource regions. The plurality of resource regions includes a first resource region corresponding to the number of hops M, a second resource region corresponding to the number of hops M+1, and a third resource region corresponding to the number of hops M+2;
a size reduction rate from the second resource region to the third resource region is greater than a size reduction rate from the first resource region to the second resource region;
M is any integer greater than or equal to 0;
User equipment according to any one of claims 1-3. 5. The resource area that can be used for transferring the data is a hop number next to the hop number or a resource area corresponding to the hop number, among the plurality of resource areas. 2. User equipment according to clause 1. A user equipment according to any one of claims 1 to 5, wherein said hop related information indicates said number of hops of said data. The user equipment according to any one of claims 1 to 5, wherein said hop-related information indicates a resource region corresponding to said number of hops among said plurality of resource regions. The user equipment according to any one of claims 1 to 7, wherein the communication processing unit transmits the data and other control information on a sidelink using resources contained in the selected resource region. . The communication processing unit is
transmitting the data and the other control information on the sidelink if none of the one or more transfer stop conditions are met;
not transmitting the data and the other control information on the sidelink if any of the one or more stop forwarding conditions are met;
9. User equipment according to claim 8. 10. The method of claim 9, wherein one of the one or more stop forwarding conditions is that the number of hops or the number of hops next to the number of hops is a predetermined number of hops corresponding to prohibiting forwarding. User equipment. 11. The user equipment according to claim 9 or 10, wherein one of said one or more forwarding stop conditions is an inability to select a resource region greater than or equal to a predetermined size based on said hop related information. The control unit generates other hop-related information related to the number of hops next to the number of hops based on the hop-related information,
the other control information includes the other hop-related information;
User equipment according to any one of claims 8-11. 13. A user equipment as claimed in any one of claims 5, 10 and 12, wherein the number of next hops is one greater than the number of hops. A user equipment according to any preceding claim, wherein said control information is sidelink control information (SCI). A user equipment (100),
An information acquisition unit (131 )When,
A communication processing unit (135) that transmits the data and the control information on a sidelink using resources included in the resource pool;
with
the resource pool includes a plurality of resource regions (61, 63, 65, 67, 81, 83, 85, 87) of different sizes;
A larger resource area of the plurality of resource areas corresponds to a smaller number of hops, and a smaller resource area of the plurality of resource areas corresponds to a larger number of hops.
User equipment.

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