Granted Patent B2

US 12,580,690 · App. 18/668,488 · Granted Mar 17, 2026

Inventors: Yifu Tang (Tokyo, JP); Hiromasa Uchiyama (Tokyo, JP); Naoki Kusashima (Tokyo, JP)

Assignee: SONY GROUP CORPORATION

H04L1/1812H04L5/0053H04W4/40H04W92/18

Abstract

Claims (71)

1 . A first user equipment, comprising:

a radio transceiver; and

circuitry configured to:

acquire sidelink information that includes information indicating a communication method of sidelink communication selected from among a broadcast, a groupcast, and a unicast;

determine to enable or disable feedback associated with Hybrid Automatic Repeat reQuest (HARQ) for the sidelink communication;

control, based on the determination that the feedback is enabled for the sidelink communication, the radio transceiver to transmit a first determination result on a Physical Sidelink Shared Channel (PSSCH), wherein the first determination result indicates that the feedback for the sidelink communication is enabled;

control, based on the determination that the feedback is disabled for the sidelink communication, the radio transceiver to transmit a second determination result on the PSSCH, wherein the second determination result indicates that the feedback for the sidelink communication is disabled; and

control, based on the acquired sidelink information that indicates the groupcast, the radio transceiver to execute the sidelink communication with the feedback, wherein the execution of the sidelink communication is based on a number of second user equipments in a group for the groupcast.

2 . The first user equipment according to claim 1 , wherein

the HARQ includes a plurality of modes with different aspects from the feedback to data retransmission, and

the circuitry is further configured to determine a mode for the HARQ from the plurality of modes based on the acquired sidelink information.

3 . The first user equipment according to claim 1 , wherein the circuitry is further configured to:

acquire, as the sidelink information of the sidelink communication, at least one piece of information of distance information indicating a distance between communication devices that perform the sidelink communication and position information indicating a position of a communication device of the communication devices; and

determine to enable or disable the feedback based on the at least one piece of information of the distance information or the position information.

4 . The first user equipment according to claim 1 , wherein the circuitry is further configured to:

acquire, as the sidelink information of the sidelink communication, information of one of a reliability request or a delay request for transmission data of the sidelink communication; and

determine to enable or disable the feedback based on the information of one of the reliability request or the delay request.

5 . The first user equipment according to claim 1 , wherein the circuitry is further configured to:

acquire, as the sidelink information of the sidelink communication, information indicating a first communication device for which the feedback is enabled is located within a specific range of a second communication device, wherein

the second communication device serves as a receiving device for the sidelink communication, and

the second user equipments include the first communication device and the second communication device; and

determine to enable or disable the feedback of the second communication device based on the information indicating the first communication device is located within the specific range.

6 . The first user equipment according to claim 5 , wherein, based on the first communication device is located within the specific range, the circuitry is further configured to:

determine to disable the feedback of the second communication device; and

determine, based on the feedback of the first communication device, to execute data retransmission to the second communication device.

7 . The first user equipment according to claim 5 , wherein, based on the first communication device is located within the specific range, the circuitry is further configured to:

determine to disable the feedback of the second communication device; and

determine, based on the feedback of the first communication device, a data transmission method from a plurality of data transmission methods for data transmission to the second communication device.

8 . The first user equipment according to claim 1 , wherein the circuitry is further configured to:

acquire, as the sidelink information of the sidelink communication, information indicating a degree of congestion of a radio resource used for the sidelink communication; and

determine to enable or disable the feedback based on the information indicating the degree of congestion.

9 . The first user equipment according to claim 1 , wherein the circuitry is further configured to:

acquire, as the sidelink information of the sidelink communication, information of a traffic of the sidelink communication; and

determine to enable or disable the feedback based on the information of the traffic.

10 . The first user equipment according to claim 1 , wherein the circuitry is further configured to:

acquire, as the sidelink information of the sidelink communication, information for identification of a device, wherein the device determines a radio resource for data retransmission; and

determine to enable or disable the feedback based on the information for the identification of the device that determines the radio resource for the data retransmission.

11 . The first user equipment according to claim 1 , wherein the circuitry is further configured to:

acquire, as the sidelink information of the sidelink communication, information of a resource pool of a radio resource used for the sidelink communication; and

determine to enable or disable the feedback based on the information of the resource pool.

12 . The first user equipment according to claim 1 , wherein the circuitry is further configured to:

acquire, as the sidelink information of the sidelink communication, information indicating the number of the second user equipments of the sidelink communication; and

determine to disable the feedback based on the number of the second user equipments that is greater than a specific number.

13 . The first user equipment according to claim 1 , wherein the circuitry is further configured to:

acquire, as the sidelink information of the sidelink communication, information indicating a type of communication service performed by use of the sidelink communication; and

determine to enable or disable the feedback based on the information indicating the type of the communication service.

14 . The first user equipment according to claim 1 , wherein the first user equipment is a communication device configured to:

execute the sidelink communication; and

notify the second user equipments that serve as corresponding devices in the sidelink communication.

15 . The first user equipment according to claim 1 , wherein the first user equipment is a base station device configured to:

radio communicate with the second user equipments that execute the sidelink communication; and

notify one of the first determination result or the second determination result to at least one of the second user equipments.

16 . The first user equipment according to claim 1 , wherein the first user equipment is a master communication device configured to:

control the sidelink communication between slave communication devices via the sidelink communication; and

notify one of the first determination result or the second determination result to at least one of the slave communication devices that execute the sidelink communication.

17 . The first user equipment according to claim 1 , wherein

the circuitry is further configured to:

control the radio transceiver to transmit data on the sidelink communication; and

control, based on the determination that the feedback is enabled, the radio transceiver to receive one of an acknowledgement (ACK) or a non-acknowledgement (NACK) for the transmitted data, and

the ACK and the NACK are not received based on the determination that the feedback is disabled.

18 . The first user equipment according to claim 17 , wherein the circuitry is further configured to control the radio transceiver to re-transmit the data on the sidelink communication based on the determination that the feedback is enabled and the NACK is received.

19 . A method, comprising:

acquiring sidelink information that includes information indicating a communication method of sidelink communication selected from among a broadcast, a groupcast, and a unicast;

determining to enable or disable feedback associated with Hybrid Automatic Repeat reQuest (HARQ) for the sidelink communication;

transmitting, based on the determination that the feedback is enabled for the sidelink communication, a first determination result on a Physical Sidelink Shared Channel (PSSCH), wherein the first determination result indicates that the feedback for the sidelink communication is enabled;

transmitting, based on the determination that the feedback for the sidelink communication is disabled, a second determination result on the PSSCH, wherein the second determination result indicates that the feedback for the sidelink communication is disabled; and

executing, based on the acquired sidelink information indicates the groupcast, the sidelink communication with the feedback, wherein the execution of the sidelink communication is based on a number of user equipments in a group for the groupcast.

20 . The method according to claim 19 , further comprising:

transmitting data on the sidelink communication; and

receiving one of an acknowledgement (ACK) or a non-acknowledgement (NACK) for the transmitted data based on the determination that the feedback is enabled, wherein the ACK and the NACK are not received based on the determination that the feedback is disabled.

21 . The method according to claim 20 , further comprising retransmitting the data on the sidelink communication based on the determination that the feedback is enabled and the NACK is received.

Priority Claims (1)

Continuity (2)

References Cited (47)