Information processing device, information processing method, and communication device to realize high communication performance

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 amongst broadcast, groupcast, and unicast;

determine, based on the acquired sidelink information, whether to enable or disable feedback related to Hybrid Automatic Repeat reQuest (HARQ) for the sidelink communication;

control the radio transceiver to transmit a first determination result on a Physical Sidelink Shared Channel (PSSCH) in a case where the feedback for the sidelink communication is determined to be enabled, wherein

the first determination result indicates that the feedback for the sidelink communication is enabled;

control the radio transceiver to transmit a second determination result on the PSSCH in a case where the feedback for the sidelink communication is determined to be disabled, wherein

the second determination result indicates that the feedback for the sidelink communication is disabled; and

classify, in a case where the acquired sidelink information indicates the groupcast, a plurality of second user equipments that receives the sidelink communication to a first group for which the feedback is enabled and to a second group for which the feedback is disabled.

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 about 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 that performs the sidelink communication, and

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

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

acquire information about a reliability request or a delay request to transmission data of the sidelink communication, as the sidelink information about the sidelink communication, and

determine whether to enable or disable the feedback based on the information about 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 about the sidelink communication, information indicating whether a first communication device for which the feedback is enabled is located within a specific range of a second communication device that serves as a receiving device for the sidelink communication,

the plurality of second user equipments includes the first communication device and the second communication device, and

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

6. The first user equipment according to claim 5 , wherein, in a case where the second communication device is located within the specific range, the circuitry is further configured to:

determine to disable the feedback of the first communication device, and

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

7. The first user equipment according to claim 5 , wherein, in a case where the second communication device is located within the specific range, the circuitry is further configured to:

determine to disable the feedback of the first communication device, and

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

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

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

determine whether 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 about the sidelink communication, information about a traffic of the sidelink communication, and

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

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

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

determine whether 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 about the sidelink communication, information about a resource pool of a radio resource used for the sidelink communication, and

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

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

the circuitry is further configured to:

acquire, as the sidelink information about the sidelink communication, information indicating a number of the plurality of second user equipments of the sidelink communication, and

determine whether to enable the feedback based on the information indicating the number of the plurality of second user equipments.

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

acquire, as the sidelink information about the sidelink communication, information indicating a type of communication service performed using the sidelink communication, and

determine whether 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 that executes the sidelink communication, and

the first user equipment is further configured to notify the plurality of second user equipments that serves 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 that radio communicates with the plurality of second user equipments that executes the sidelink communication, and

the first user equipment is further configured to notify the first determination result or the second determination result to at least one of the plurality of the second user equipments that performs the sidelink communication.

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

the first user equipment is a master communication device that controls the sidelink communication between slave communication devices via the sidelink communication, and

the first user equipment is further configured to notify the first determination result or the second determination result to at least one of the slave communication devices that perform 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 the radio transceiver to receive an acknowledgement (ACK) or a non-acknowledgement (NACK) for the transmitted data in a case where the feedback is enabled, wherein

the ACK and NACK is not received in a case where 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 in a case where 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 amongst broadcast, groupcast, and unicast;

determining, based on the acquired sidelink information, whether to enable or disable feedback related to Hybrid Automatic Repeat reQuest (HARQ) for the sidelink communication;

transmitting a first determination result on a Physical Sidelink Shared Channel (PSSCH) in a case where the feedback for the sidelink communication is determined to be enabled, wherein

the first determination result indicates that the feedback for the sidelink communication is enabled;

transmitting a second determination result on the PSSCH in a case where the feedback for the sidelink communication is determined to be disabled, wherein

the second determination result indicates that the feedback for the sidelink communication is disabled; and

classifying, in a case where the acquired sidelink information indicates the groupcast, a plurality of second user equipments that receives the sidelink communication to a first group for which the feedback is enabled and to a second group for which the feedback is disabled.

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

transmitting data on the sidelink communication; and

receiving an acknowledgement (ACK) or a non-acknowledgement (NACK) for the transmitted data in a case where the feedback is enabled, wherein

the ACK and NACK is not received in a case where the feedback is disabled.

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

re-transmitting the data on the sidelink communication in a case where the feedback is enabled and the NACK is received.