EPS bearer identifier allocation method and device, SMF and PCF

1. A method of allocating an Evolved Packet System (EPS) bearer identifier, the method being applied to a Session Management Function (SMF) entity and comprising:

mapping a session/connection to an Evolved Packet System (EPS) bearer;

requesting a User Equipment (UE) or an Access and Mobility management Function (AMF) entity to allocate an EPS bearer identifier to the mapped EPS bearer;

receiving the EPS bearer identifier of the mapped EPS bearer being allocated to the mapped EPS bearer by the UE or the AMF; and

determining an EPS bearer context or parameter information of a related EPS bearer based on the EPS bearer identifier and the information of the mapped EPS bearer,

wherein requesting the UE or the AMF entity to allocate the EPS bearer identifier to the mapped EPS bearer, comprises:

transmitting a first message to the UE to request the UE to allocate the EPS bearer identifier to the mapped EPS bearer, wherein the first message carries information of the mapped EPS bearer; or

transmitting a second message to the AMF to request the AMF to allocate the EPS bearer identifier to the mapped EPS bearer, wherein the second message carries information of the mapped EPS bearer or the number of the mapped EPS bearers.

2. The method according to claim 1 , wherein the information of the EPS bearer carries a mapping relation between the EPS bearer and a Quality of Service data flow (QoS flow) or a mapping relation between the EPS bearer and a Traffic Flow Template (TFT).

3. The method according to claim 1 , wherein the first message is a Packet Data Unit (PDU) Session Establishment Accept message.

4. The method according to claim 1 , wherein before transmitting the second message to the AMF, the method further comprises:

receiving a Packet Data Unit (PDU) Session Establishment Request message from the UE; or

receiving an EPS bearer context request message transmitted by the AMF.

5. The method according to claim 1 , wherein when the AMF allocates the EPS bearer identifier to the mapped EPS bearer, the method further comprises:

notifying the UE of the EPS bearer context or the parameter information of the related EPS bearer.

6. A device of allocating an Evolved Packet System (EPS) bearer identifier, the device being applied to a Session Management Function (SMF) entity and comprising:

a mapping circuit, configured to map a session/connection to an Evolved Packet System (EPS) bearer;

a request circuit, configured to request a User Equipment (UE) or an Access and Mobility management Function (AMF) entity to allocate an EPS bearer identifier to a mapped EPS bearer;

a second reception circuit, configured to receive an EPS bearer identifier of a mapped EPS bearer being allocated to the mapped EPS bearer by the UE or the AMF; and

a first determination circuit, configured to determine an EPS bearer context or parameter information of a related EPS bearer based on the EPS bearer identifier and the information of the mapped EPS bearer,

wherein the request circuit comprises:

a first transmission subcircuit, configured to transmit a first message to the UE to request the UE to allocate an EPS bearer identifier to the mapped EPS bearer, wherein the first message carries information of the mapped EPS bearer; and

a second transmission subcircuit, configured to transmit a second message to the AMF to request the AMF to allocate an EPS bearer identifier to the mapped EPS bearer, wherein the second message carries information of the mapped EPS bearer or the number of EPS bearers.

7. The device according to claim 6 , wherein the information of the EPS bearer carries a mapping relation between the EPS bearer and a Quality of Service data flow (QoS flow) or a mapping relation between the EPS bearer and a Traffic Flow Template (TFT).

8. The device according to claim 6 , wherein the first message is a Packet Data Unit (PDU) Session Establishment Accept message.

9. The device according to claim 6 , further comprising:

a first reception circuit, configured to receive a Packet Data Unit (PDU) Session Establishment Request message from the UE, or receive an EPS bearer context request message transmitted by the AMF.

10. The device according to claim 6 , wherein the AMF allocates the EPS bearer identifier to the mapped EPS bearer, and the device further comprises:

a notifying circuit, configured to notify the UE of the EPS bearer context or the parameter information of the related EPS bearer.

11. A Session Management Function (SMF) entity, comprising:

a first storage, a first processor, and a computer program stored on the first storage and executable on the first processor,

wherein when the first processor executes the computer program, the first processor implements steps of the method according to claim 1 .

12. The SMF entity according to claim 11 , wherein the information of the EPS bearer carries a mapping relation between the EPS bearer and a Quality of Service data flow (QoS flow) or a mapping relation between the EPS bearer and a Traffic Flow Template (TFT).

13. The SMF entity according to claim 11 wherein the first message is a Packet Data Unit (PDU) Session Establishment Accept message.

14. The SMF entity according to claim 11 , wherein before transmitting the second message to the AMF, the first processor is further configured to implement:

receiving a Packet Data Unit (PDU) Session Establishment Request message from the UE; or

receiving an EPS bearer context request message transmitted by the AMF.

15. A non-volatile storage medium, comprising:

a program and an instruction stored on the non-volatile storage medium, wherein when the program and the instruction are executed by a processor, the processor implements the method according to claim 1 .