Patent ID: 11943064
Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for data retransmission, comprising:
sending first data, by a second terminal device, to a first terminal device through device to device (D2D) communication;
receiving, by the second terminal device, feedback information of the first terminal device responsive to the first data, wherein the feedback information comprises a negative acknowledgment (NACK) message;
sending, by the second terminal device, a resource request message to a network device, according to the feedback information of the first terminal device responsive to the first data, wherein the resource request message is used for requesting a retransmission resource; and
obtaining the retransmission resource by the second terminal device according to indication of the network device, wherein the retransmission resource is used for retransmitting the first data, by the second terminal device to the first terminal device;
wherein a resource used for sending the resource request message by the second terminal device to the network device, is indicated by the network device in control information which is indicative of a resource used for sending the first data by the second terminal device, wherein the resource request message comprises the feedback information of the first terminal device responsive to the first data;
wherein the method further comprises:
resending the resource request message, by the second terminal device, to the network device, when the second terminal device receives another NACK message, from the network device, which indicates that the resource requested by the second terminal device cannot be used for retransmission.