Duplication mode communication processing method in CU-DU architecture, and device

1. A method, comprising:

sending, by a central unit (CU) of a base station, a request message to a distributed unit (DU) of the base station, wherein the request message comprises an identifier of a data radio bearer and information indicating at least two uplink general packet radio service (GPRS) tunneling protocol tunnel endpoints associated with an F1 interface between the CU and the DU for a duplication mode of the data radio bearer, wherein the information indicating the at least two uplink GPRS tunneling protocol tunnel endpoints comprises internet protocol (IP) addresses of the at least two uplink GPRS tunnel protocol tunnel endpoints and tunnel endpoint identifiers (TEIDs) of the at least two uplink GPRS tunnel protocol tunnel endpoints;

sending, by the DU, a response message to the CU, wherein the response message comprises information indicating at least two downlink GPRS tunneling protocol tunnel endpoints associated with the F1 interface between the CU and the DU for the data radio bearer, and a logical channel identity of a primary path determined by the DU among at least two logical channels of the data radio bearer, wherein the information indicating the at least two downlink GPRS tunneling protocol tunnel endpoints comprises IP addresses of the at least two downlink GPRS tunnel protocol tunnel endpoints and TEIDs of the at least two downlink GPRS tunnel protocol tunnel endpoints;

wherein the request message and the response message are a user equipment (UE) context setup message, or the request message and the response message are a UE context modification message;

wherein the primary path determined by the DU corresponds to a first uplink GPRS tunnel protocol tunnel endpoint of the at least two uplink GPRS tunnel protocol tunnel endpoints; and

notifying, by the CU to a terminal device through the DU, a packet data convergence protocol (PDCP) configuration of the data radio bearer, wherein the PDCP configuration comprises the logical channel identity of the primary path among the at least two logical channels of the data radio bearer.

2. The method according to claim 1 , wherein the at least two downlink GPRS tunneling protocol tunnel endpoints are in a one-to-one correspondence with the at least two uplink GPRS tunneling protocol tunnel endpoints.

3. The method according to claim 1 , wherein the duplication mode of the data radio bearer is a mode that, for the data radio bearer, one PDCP entity at a PDCP layer corresponds to at least two radio link control (RLC) entities at an RLC layer, and at least some data on the PDCP entity is transmitted on the at least two RLC entities in duplicate.

4. The method according to claim 1 , wherein the CU is configured to implement a function of a PDCP layer and a function of a radio resource control (RRC) layer, and the DU is configured to implement a function of a physical (PHY) layer, a function of a media access control (MAC) layer, and a function of a radio link control (RLC) layer.

5. The method according to claim 1 , wherein the logical channel identity of the primary path corresponds to one of the at least two downlink GPRS tunneling protocol tunnel endpoints.

6. A system, comprising: a central unit (CU) of a base station and a distributed unit (DU) of the base station;

wherein the CU comprises a first non-transitory memory storage storing first instructions, and at least one first hardware processor in communication with the first non-transitory memory storage, wherein the first instructions instruct the at least one first hardware processor to:

send a request message to the DU, wherein the request message comprises an identifier of a data radio bearer and information indicating at least two uplink general packet radio service (GPRS) tunneling protocol tunnel endpoints associated with an F1 interface between the CU and the DU for a duplication mode of the data radio bearer, wherein the information indicating the at least two uplink GPRS tunneling protocol tunnel endpoints comprises internet protocol (IP) addresses of the at least two uplink GPRS tunnel protocol tunnel endpoints and tunnel endpoint identifiers (TEIDs) of the at least two uplink GPRS tunnel protocol tunnel endpoints;

wherein the DU comprises a second non-transitory memory storage storing second instructions, and at least one second hardware processor in communication with the second non-transitory memory storage, wherein the second instructions instruct the at least one second hardware processor to:

send a response message to the CU, wherein the response message comprises information indicating at least two downlink GPRS tunneling protocol tunnel endpoints associated with the F1 interface between the CU and the DU for the data radio bearer, and a logical channel identity of a primary path determined by the DU among at least two logical channels of the data radio bearer, wherein the information indicating the at least two downlink GPRS tunneling protocol tunnel endpoints comprises IP addresses of the at least two downlink GPRS tunnel protocol tunnel endpoints and TEIDs of the at least two downlink GPRS tunnel protocol tunnel endpoints;

wherein the request message and the response message are a user equipment (UE) context setup message, or the request message or the response message are a UE context modification message;

wherein the primary path determined by the DU corresponds to a first uplink GPRS tunnel protocol tunnel endpoint of the at least two uplink GPRS tunnel protocol tunnel endpoints; and

wherein the at least one first hardware processor executes the first instructions to notify to a terminal device through the DU, a packet data convergence protocol (PDCP) configuration of the data radio bearer, wherein the PDCP configuration comprises the logical channel identity of the primary path among the at least two logical channels of the data radio bearer.

7. The system according to claim 6 , wherein the at least two downlink GPRS tunneling protocol tunnel endpoints are in a one-to-one correspondence with the at least two uplink GPRS tunneling protocol tunnel endpoints.

8. The system according to claim 6 , wherein the duplication mode of the data radio bearer is a mode that, for the data radio bearer, one PDCP entity at a PDCP layer corresponds to at least two radio link control (RLC) entities at an RLC layer, and at least some data on the PDCP entity is transmitted on the at least two RLC entities in duplicate.

9. The system according to claim 6 , wherein the first instructions instruct the at least one first hardware processor to implement a function of a PDCP layer and a function of a radio resource control (RRC) layer, and the second instructions instruct the at least one second hardware processor to implement a function of a physical (PHY) layer, a function of a media access control (MAC) layer, and a function of a radio link control (RLC) layer.

10. The system according to claim 6 , wherein the logical channel identity of the primary path corresponds to one of the at least two downlink GPRS tunneling protocol tunnel endpoints.

11. A method, comprising:

receiving, by a distributed unit (DU) of a base station, a request message sent by a central unit (CU) of the base station, wherein the request message comprises an identifier of a data radio bearer and information indicating at least two uplink general packet radio service (GPRS) tunneling protocol tunnel endpoints associated with an F1 interface between the CU and the DU for a duplication mode of the data radio bearer, wherein the information indicating the at least two uplink GPRS tunneling protocol tunnel endpoints comprises internet protocol (IP) addresses of the at least two uplink GPRS tunnel protocol tunnel endpoints and tunnel endpoint identifiers (TEIDs) of the at least two uplink GPRS tunnel protocol tunnel endpoints;

sending, by the DU, a response message to the CU, wherein the response message comprises information indicating at least two downlink GPRS tunneling protocol tunnel endpoints associated with the F1 interface between the CU and the DU for the data radio bearer, and a logical channel identity of a primary path determined by the DU among at least two logical channels of the data radio bearer, wherein the information indicating the at least two downlink GPRS tunneling protocol tunnel endpoints comprises IP addresses of the at least two downlink GPRS tunnel protocol tunnel endpoints and TEIDs of the at least two downlink GPRS tunnel protocol tunnel endpoints;

wherein the request message and the response message are a user equipment (UE) context setup message; or the request message and the response message are a UE context modification message;

wherein the primary path determined by the DU corresponds to a first uplink GPRS tunnel protocol tunnel endpoint of the at least two uplink GPRS tunnel protocol tunnel endpoints;

receiving, by the DU, from the CU a packet data convergence protocol (PDCP) configuration of the data radio bearer, wherein the PDCP configuration comprises the logical channel identity of the primary path among the at least two logical channels of the data radio bearer; and

sending, by the DU, the PDCP configuration to a terminal side device.

12. The method according to claim 11 , wherein the at least two downlink GPRS tunneling protocol tunnel endpoints are in a one-to-one correspondence with the at least two uplink GPRS tunneling protocol tunnel endpoints.

13. The method according to claim 11 , wherein the duplication mode of the data radio bearer is a mode that, for the data radio bearer, one PDCP entity at a PDCP layer corresponds to at least two radio link control (RLC) entities at an RLC layer, and at least some data on the PDCP entity is transmitted on the at least two RLC entities in duplicate.

14. The method according to claim 11 , wherein the CU is configured to implement a function of a PDCP layer and a function of a radio resource control (RRC) layer, and the DU is configured to implement a function of a physical (PHY) layer, a function of a media access control (MAC) layer, and a function of a radio link control (RLC) layer.

15. The method according to claim 11 , wherein the logical channel identity of the primary path corresponds to one of the at least two downlink GPRS tunneling protocol tunnel endpoints.

16. A network device, comprising: a non-transitory memory storage storing instructions, and at least one hardware processor in communication with the non-transitory memory storage, wherein the instructions instruct the at least one hardware processor to:

receive a request message sent by a central unit (CU) of a base station, wherein the request message comprises an identifier of a data radio bearer and information indicating at least two uplink general packet radio service (GPRS) tunneling protocol tunnel endpoints associated with an F1 interface between the CU and the device for a duplication mode of the data radio bearer, wherein the information indicating the at least two uplink GPRS tunneling protocol tunnel endpoints comprises internet protocol (IP) addresses of the at least two uplink GPRS tunnel protocol tunnel endpoints and tunnel endpoint identifiers (TEIDs) of the at least two uplink GPRS tunnel protocol tunnel endpoints;

send a response message to the CU, wherein the response message comprises information indicating at least two downlink GPRS tunneling protocol tunnel endpoints associated with the F1 interface between the CU and the device for the data radio bearer, and a logical channel identity of a primary path determined by the network device among at least two logical channels of the data radio bearer, wherein the information indicating the at least two downlink GPRS tunneling protocol tunnel endpoints comprises IP addresses of the at least two downlink GPRS tunnel protocol tunnel endpoints and TEIDs of the at least two downlink GPRS tunnel protocol tunnel endpoints;

wherein the request message and the response message are a user equipment (UE) context setup message, or the request message and the response message are a UE context modification message;

wherein the primary path determined by the DU corresponds to a first uplink GPRS tunnel protocol tunnel endpoint of the at least two uplink GPRS tunnel protocol tunnel endpoints;

receive from the CU a packet data convergence protocol (PDCP) configuration of the data radio bearer, wherein the PDCP configuration comprises the logical channel identity of the primary path among the at least two logical channels of the data radio bearer; and

send the PDCP configuration to a terminal.

17. The device according to claim 16 , wherein the at least two downlink GPRS tunneling protocol tunnel endpoints are in a one-to-one correspondence with the at least two uplink GPRS tunneling protocol tunnel endpoints.

18. The device according to claim 16 , wherein the duplication mode of the data radio bearer is a mode that, for the data radio bearer, one PDCP entity at a PDCP layer corresponds to at least two radio link control (RLC) entities at an RLC layer, and at least some data on the PDCP entity is transmitted on the at least two RLC entities in duplicate.

19. The device according to claim 16 , wherein the instructions further instruct the at least one hardware processor to implement a function of a PDCP layer and a function of a radio resource control (RRC) layer, and the hardware processor executes the instructions to implement a function of a physical (PHY) layer, a function of a media access control (MAC) layer, and a function of a radio link control (RLC) layer.

20. The device according to claim 16 , wherein the logical channel identity of the primary path corresponds to one of the at least two downlink GPRS tunneling protocol tunnel endpoints.