Information transmission method and apparatus

1. An information transmission method, comprising:

confirming, by a transmitting terminal, activation/deactivation of PC5 Hybrid Automatic Repeat reQuest (HARQ) retransmission; and

retransmitting, by the transmitting terminal according to negative acknowledgement response information from a receiving terminal, Vehicle to Everything (V2X) service data to the receiving terminal over PC5.

2. The method according to claim 1 , wherein the step of confirming, by the transmitting terminal, activation/deactivation of PC5 HARQ retransmission comprises:

determining, by the transmitting terminal, whether to activate/deactivate the PC5 HARQ retransmission according to at least one of: a V2X service attribute, a PC5 link state, and a retransmission activation state.

3. The method according to claim 1 , wherein the step of confirming, by the transmitting terminal, activation/deactivation of PC5 HARQ retransmission comprises:

sending, by the transmitting terminal, indication information to a base station, the indication information comprising at least one of: a V2X service attribute, a PC5 link state, and a retransmission activation state;

configuring, by the base station according to the indication information, activation/deactivation of the PC5 HARQ retransmission for the transmitting terminal; and

indicating, by the transmitting terminal according to the information configured by the base station, an activated state of the PC5 retransmission to the receiving terminal.

4. The method according to claim 1 , wherein before retransmitting, by the transmitting terminal, V2X service data to the receiving terminal, the method further comprises:

sending, by the transmitting terminal, V2X service data to the receiving terminal; and

receiving, by the transmitting terminal on a Physical Sidelink Feedback Channel (PSFCH), response information sent from the receiving terminal.

5. The method according to claim 1 , wherein the step of confirming, by the transmitting terminal, activation/deactivation of PC5 HARQ retransmission comprises:

indicating, in response to the transmitting terminal confirming activation of the PC5 retransmission, configuration information of PC5 retransmission resource while initially sending resource configuration information of the V2X service data to the receiving terminal.

6. The method according to claim 1 , wherein before retransmitting, by the transmitting terminal, V2X service data to the receiving terminal, the method further comprises:

determining, by the transmitting terminal, configuration information of PC5 retransmission resource for retransmitting V2X service data; and

sending, by the transmitting terminal after determining the configuration information of the PC5 retransmission resource, retransmission resource indication information to the receiving terminal, wherein the retransmission resource indication information comprises retransmission resource and the number of retransmissions.

7. The method according to claim 6 , wherein the step of determining, by the transmitting terminal, the PC5 retransmission resource comprises:

requesting, by transmitting terminal, the PC5 retransmission resource from a base station, and configuring, by the base station, the PC5 retransmission resources for the transmitting terminal.

8. The method according to claim 6 , wherein the retransmission resource comprises: a retransmission time domain, a retransmission frequency domain, a time interval between retransmission and initial transmission, and a modulation coding format of retransmission.

9. The method according to claim 1 , wherein the transmitting terminal retransmits the V2X service data to the receiving terminal over PC5 by asynchronous adaptive retransmission or synchronous non-adaptive retransmission.

10. The method according to claim 1 , wherein the transmitting terminal or the receiving terminal comprises one of: an On Board Unit (OBU), a Road Side Unit (RSU), a User Equipment (UE), a Vehicle-UE, a Pedestrian-UE, a wearable device, a UE-to-network relay, and an Internet of Things/Manual Toll Collection (IoT/MTC) terminal.

11. The method according to claim 1 , wherein the receiving terminal comprises a plurality of receiving terminals, and the transmitting terminal retransmits the V2X service data to the plurality of receiving terminals through multicast or broadcast.

12. A non-transitory storage medium storing a computer program thereon, wherein the computer program, when executed by a processor, causes the processor to perform the method according to claim 1 .

13. An electronic apparatus, comprising a memory and a processor, wherein the memory has a computer program stored thereon, and the processor, when executing the computer program, executes the method according to claim 1 .

14. The method according to claim 6 , wherein the step of determining, by the transmitting terminal, the PC5 retransmission resource comprises:

selecting, by the transmitting terminal, the PC5 retransmission resource from a configuration resource pool.