PDCP duplication configuration method and terminal device

1. A packet data convergence protocol PDCP duplication configuration method, comprising:

determining, by a terminal device, configuration information of a sidelink SL PDCP duplication; and

performing, by the terminal device, SL PDCP duplication configuration based on the configuration information,

wherein the determining, by a terminal device, configuration information of an SL PDCP duplication comprises:

determining, by the terminal device, the configuration information of the SL PDCP duplication based on only a service attribute, a logical channel priority, and a channel condition,

wherein the configuration information of the SL PDCP duplication comprises:

sixth configuration information used to indicate a quantity of transmission branches used by a PDCP duplication, wherein the quantity of transmission branches is a total quantity of logical channels of at least two radio access technologies used by the SL PDCP duplication; and

seventh configuration information used to indicate a transmission bandwidth part BWP used by a PDCP duplication.

2. The method according to claim 1 , wherein when the terminal device is an SL sending terminal device,

the configuration information of the SL PDCP duplication is sent by a network device, an SL resource scheduling terminal device, or an SL receiving terminal device to the SL sending terminal device; or

the configuration information of the SL PDCP duplication is agreed upon by the SL sending terminal device and the SL receiving terminal device in advance.

3. The method according to claim 1 , wherein when the terminal device is an SL receiving terminal device,

the configuration information of the SL PDCP duplication is sent by a network device, an SL resource scheduling terminal device, or an SL sending terminal device to the SL receiving terminal device; or

the configuration information of the SL PDCP duplication is agreed upon by the SL sending terminal device and the SL receiving terminal device in advance.

4. The method according to claim 1 , wherein the configuration information of the SL PDCP duplication further comprises at least one of the following:

first configuration information used to instruct to activate or deactivate a PDCP duplication;

second configuration information used to indicate a radio access technology used by a PDCP duplication;

third configuration information used to indicate a radio access technology used by a PDCP in a PDCP duplication;

fourth configuration information used to indicate a logical channel identifier LCD used by a PDCP duplication;

fifth configuration information used to indicate carrier information used by a PDCP duplication;

eighth configuration information used to indicate a transmission resource pool used by a PDCP duplication.

5. The method according to claim 1 , wherein the configuration information of the SL PDCP duplication is sent through broadcast, or sent by using a control channel, or sent by using a data channel.

6. The method according to claim 4 , wherein the fourth configuration information comprises at least two LCIDs, and

the at least two LCIDs are configured by a same MAC entity, or

the at least two LCIDs are configured by different MAC entities.

7. The method according to claim 1 , wherein the at least two radio access technologies comprise a first radio access technology and a second radio access technology, wherein

a first logical channel corresponding to the first radio access technology and a second logical channel corresponding to the second radio access technology are configured by a same MAC entity; and/or

a first hybrid automatic repeat request HARQ process corresponding to the first logical channel and a second HARQ process corresponding to the second logical channel are configured by the same MAC entity.

8. The method according to claim 1 , wherein the at least two radio access technologies comprise a first radio access technology and a second radio access technology, wherein

a first logical channel of the first radio access technology corresponds to a first MAC entity, and a second logical channel of the second radio access technology corresponds to a second MAC entity; and/or

a first HARQ process of the first radio access technology corresponds to the first MAC entity, and a second HARQ process of the second radio access technology corresponds to the second MAC entity, wherein

the first MAC entity is different from the second MAC entity.

9. The method according to claim 8 , wherein

there is at least one first logical channel; and/or

there is at least one second logical channel.

10. A terminal device, comprising: a memory, a processor, and a computer program that is stored in the memory and that can run on the processor, wherein when the computer program is executed by the processor, following steps are implemented:

determining configuration information of a sidelink SL PDCP duplication; and

performing SL PDCP duplication configuration based on the configuration information,

wherein when the computer program is executed by the processor, a following step is further implemented:

determining the configuration information of the SL PDCP duplication based on only a service attribute, a logical channel priority, and a channel condition,

wherein the configuration information of the SL PDCP duplication comprises:

sixth configuration information used to indicate a quantity of transmission branches used by a PDCP duplication, wherein the quantity of transmission branches is a total quantity of logical channels of at least two radio access technologies used by the SL PDCP duplication; and

seventh configuration information used to indicate a transmission bandwidth part BWP used by a PDCP duplication.

11. The terminal device according to claim 10 , wherein when the terminal device is an SL sending terminal device,

the configuration information of the SL PDCP duplication is sent by a network device, an SL resource scheduling terminal device, or an SL receiving terminal device to the SL sending terminal device; or

the configuration information of the SL PDCP duplication is agreed upon by the SL sending terminal device and the SL receiving terminal device in advance.

12. The terminal device according to claim 10 , wherein when the terminal device is an SL receiving terminal device,

the configuration information of the SL PDCP duplication is sent by a network device, an SL resource scheduling terminal device, or an SL sending terminal device to the SL receiving terminal device; or

the configuration information of the SL PDCP duplication is agreed upon by the SL sending terminal device and the SL receiving terminal device in advance.

13. The terminal device according to claim 10 , wherein the configuration information of the SL PDCP duplication further comprises at least one of the following:

first configuration information used to instruct to activate or deactivate a PDCP duplication;

second configuration information used to indicate a radio access technology used by a PDCP duplication;

third configuration information used to indicate a radio access technology used by a PDCP in a PDCP duplication;

fourth configuration information used to indicate a logical channel identifier LCD used by a PDCP duplication;

fifth configuration information used to indicate carrier information used by a PDCP duplication;

eighth configuration information used to indicate a transmission resource pool used by a PDCP duplication.

14. The terminal device according to claim 10 , wherein the configuration information of the SL PDCP duplication is sent through broadcast, or sent by using a control channel, or sent by using a data channel.

15. The terminal device according to claim 13 , wherein the fourth configuration information comprises at least two LCIDs, and

the at least two LCIDs are configured by a same MAC entity, or

the at least two LCIDs are configured by different MAC entities.

16. A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, following steps are implemented:

determining configuration information of a sidelink SL PDCP duplication; and

performing SL PDCP duplication configuration based on the configuration information,

wherein when the computer program is executed by the processor, a following step is further implemented:

determining the configuration information of the SL PDCP duplication based on only a service attribute, a logical channel priority, and a channel condition,

wherein the configuration information of the SL PDCP duplication comprises:

sixth configuration information used to indicate a quantity of transmission branches used by a PDCP duplication, wherein the quantity of transmission branches is a total quantity of logical channels of at least two radio access technologies used by the SL PDCP duplication; and

seventh configuration information used to indicate a transmission bandwidth part BWP used by a PDCP duplication.