CN-113099411-B - Method and equipment for transmitting feedback information and retransmitting data

CN113099411BCN 113099411 BCN113099411 BCN 113099411BCN-113099411-B

Abstract

The embodiment of the application provides a method and equipment for transmitting feedback information and retransmitting data, which can improve the reliability of communication. The method comprises the steps that a first terminal device obtains feedback resources according to first indication information, the feedback resources are used for bearing feedback information of a first message sent by the first terminal device for a second terminal device, and the first terminal device sends the feedback information to the second terminal device on the feedback resources in a device-to-device (D2D) mode.

Inventors

LU QIANXI
ZHAO ZHENSHAN
LIN HUIMIN

Assignees

OPPO广东移动通信有限公司

Dates

Publication Date: 20260508
Application Date: 20180910

Claims (10)

1. A method of data retransmission, comprising: the second terminal device sends first data to the first terminal device in a device-to-device (D2D) mode; The second terminal equipment receives feedback information sent by the first terminal equipment to the first data, wherein the feedback information comprises a non-acknowledgement (NACK) message; the second terminal equipment sends a resource request message to the network equipment according to the feedback information of the first terminal equipment on the first data, wherein the resource request message is used for requesting retransmission resources; The second terminal equipment retransmits the first data to the first terminal equipment in a D2D mode on the retransmission resource according to the feedback information of the first terminal equipment on the first data; The network equipment sends a resource request message to the second terminal equipment, wherein the resource used for sending the resource request message is indicated by the network equipment in control information for indicating the resource used by the second terminal equipment for sending the first data; Wherein the method further comprises: And the second terminal equipment re-sends a resource request message to the network equipment when receiving another NACK information sent by the network equipment, wherein the other NACK information is used for indicating that retransmission resources requested by the second terminal equipment cannot be used for retransmission.
2. The method of claim 1, wherein the second terminal device obtains retransmission resources, comprising: and the second terminal equipment acquires retransmission resources according to the indication information sent by the network equipment.
3. The method according to claim 1, wherein the resource request message includes feedback information of the first terminal device on the first data.
4. The method of claim 1, wherein the resource request message is carried in a scheduling request, SR, message in PUCCH, an ACK/NACK message in PUCCH, a medium access control element, MAC CE, or radio resource control, RRC, signaling.
5. A second terminal device, comprising: A communication unit, configured to send first data to a first terminal device in a device-to-device D2D manner, receive feedback information sent by the first terminal device to the first data, and send a resource request message to a network device according to the feedback information sent by the first terminal device to the first data, where the resource request message is used to request retransmission of a resource, and the feedback information includes a non-acknowledgement NACK message; the processing unit is used for acquiring retransmission resources; The communication unit is further configured to perform retransmission for the first data on the retransmission resource by using a D2D manner to the first terminal device according to feedback information of the first terminal device on the first data; The network equipment sends a resource request message to the second terminal equipment, wherein the resource used for sending the resource request message is indicated by the network equipment in control information for indicating the resource used by the second terminal equipment for sending the first data; The communication unit is further configured to, when receiving another NACK message sent by the network device, resend a resource request message to the network device, where the another NACK message is used to indicate that a retransmission resource requested by the second terminal device cannot be used for retransmission.
6. The second terminal device according to claim 5, wherein the processing unit is specifically configured to: And acquiring retransmission resources according to the indication information sent by the network equipment.
7. The second terminal device according to claim 5, wherein the resource request message includes feedback information of the first terminal device on the first data.
8. The second terminal device according to claim 5, wherein the resource request message is carried in a scheduling request SR message in PUCCH, an ACK/NACK message in PUCCH, a medium access control element MAC CE or radio resource control RRC signaling.
9. A terminal device comprising a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory for performing the method according to any of claims 1 to 4.
10. A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 4.

Description

Method and equipment for transmitting feedback information and retransmitting data Technical Field The embodiment of the application relates to the technical field of communication, in particular to a method and equipment for transmitting feedback information and retransmitting data. Background The internet of vehicles system is based on a Side Link (SL) transmission technology of long term evolution vehicle-to-vehicle (long term evaluation vehicle to vehicle, LTE V2V), and different from the traditional mode that communication data is received or transmitted through a base station in the LTE system, the internet of vehicles system adopts a mode of terminal-to-terminal direct communication, so that the internet of vehicles system has higher spectral efficiency and lower transmission delay. In the internet of vehicles system, the data sent by the first terminal device can be directly sent to the second terminal device without being routed through the network device, the data transmission can be directly carried out between the first terminal device and the second terminal device, and how to ensure the reliability of the data transmission in the internet of vehicles system becomes a problem to be solved. Disclosure of Invention The embodiment of the application provides a method and equipment for transmitting feedback information and retransmitting data, which can improve the reliability of a communication system when terminal equipment communicates in a D2D mode. In a first aspect, a method for transmitting feedback information is provided, which includes that a first terminal device obtains feedback resources according to first indication information, the feedback resources are used for bearing feedback information of a first message sent by the first terminal device for a second terminal device, and the first terminal device sends the feedback information to the second terminal device in a device-to-device (D2D) mode on the feedback resources. In a second aspect, a method for transmitting feedback information is provided, which includes that a second terminal device sends a first message to a first terminal device in a device-to-device (D2D) mode, the second terminal device sends first indication information to the first terminal device, the first indication information is used for indicating feedback resources, and the feedback resources are resources used by the first terminal device to send feedback information for the first message to the second terminal device in a D2D mode. In a third aspect, a method for transmitting feedback information is provided, where the method includes that a network device sends first indication information to a first terminal device, or the network device sends second indication information to a second terminal device, where the second indication information is used for the second terminal device to generate the first indication information and send the first indication information to the first terminal device, and the first indication information is used for indicating feedback resources, where the feedback resources are used for carrying feedback information of a first message sent by the first terminal device to the second terminal device in a device-to-device D2D manner. In a fourth aspect, a method for retransmitting data is provided, which includes that a second terminal device sends first data to a first terminal device in a device-to-device (D2D) mode, the second terminal device obtains retransmission resources, and the second terminal device retransmits the first data to the first terminal device in a D2D mode on the retransmission resources according to feedback information of the first terminal device on the first data. In a fifth aspect, a method for retransmitting data is provided, wherein the method comprises the steps that a first terminal device receives first data sent by a second terminal device in a device-to-device (D2D) mode, the first terminal device sends feedback information for the first data to the second terminal device in a D2D mode, and the first terminal device receives retransmission for the first data sent by the second terminal device in a D2D mode. In a sixth aspect, a method for retransmitting data is provided, where the method includes that a network device sends indication information to a second terminal device, where the indication information is used to indicate retransmission resources, where the retransmission resources are used to carry feedback information of first data sent by the second terminal device to the second terminal device by the second terminal device, and retransmission for the first data is performed to the first terminal device in a device-to-device D2D manner. A seventh aspect provides a terminal device for performing the method of the first aspect, the second aspect, the fourth aspect, the fifth aspect or each implementation manner thereof. Specifically, the terminal device includes functional modules for performi