Method and apparatus for connection establishment, base station, user equipment, and core network device

1. A method for establishing connection, performed by a base station, comprising:

receiving target user equipment (UE) information and network slice information corresponding to a service to be transmitted, sent by a core network; and

sending the network slice information to a target UE corresponding to the target UE information, wherein the network slice information comprises a plurality of network slice identifiers, the network slice information is configured for the target UE to select a network slice identifier with a highest priority from the plurality of network slice identifiers, and use a network slice corresponding to the selected network slice identifier as a target network slice to establish the connection with the base station based on the target network slice, wherein, a plurality of network slices corresponding to the plurality of network slice identifiers are located in a set of network slices supported by the UE.

2. The method according to claim 1 , wherein receiving target UE information and network slice information corresponding to the service to be transmitted, sent by the core network comprises:

receiving a first paging signaling sent by the core network through an interface between the core network and the base station; and

obtaining the target UE information and the network slice information corresponding to the service to be transmitted, from the first paging signaling.

3. The method according to claim 1 , wherein sending the network slice information to the target UE corresponding to the target UE information comprises:

adding the network slice information in a second paging signaling;

sending the second paging signaling added with the network slice information to the target UE corresponding to the target UE information through an air interface.

4. The method according to claim 3 , wherein adding the network slice information in the second paging signaling comprises:

adding a new signaling and/or a new information unit in the second paging signaling, and adding the network slice information in the new signaling and/or the new information unit; or

adding the network slice information to an existing signaling of the second paging signaling.

5. A method for establishing connection, performed by a user equipment (UE), comprising:

receiving network slice information corresponding to a service to be transmitted, sent by a base station;

in response to the network slice information comprises a plurality of network slice identifiers, selecting a network slice identifier with a highest priority from the plurality of network slice identifiers, and using a network slice corresponding to the selected network slice identifier as a target network slice, wherein, a plurality of network slices corresponding to the plurality of network slice identifiers are located in a set of network slices supported by the UE; and

establishing the connection with the base station based on the target network slice.

6. The method according to claim 5 , wherein receiving the network slice information corresponding to the service to be transmitted, sent by the base station comprises:

receiving a second paging signaling sent by the base station through an air interface;

obtaining the network slice information from the second paging signaling.

7. The method according to claim 6 , wherein obtaining the network slice information from the second paging signaling comprises:

obtaining the network slice information from a new signaling and/or a new information unit of the second paging signaling; or

obtaining the network slice information from an existing signaling of the second paging signaling.

8. A method for establishing connection, performed by a core network device, comprising:

determining a service to be transmitted to a target user equipment (UE);

sending target UE information and network slice information corresponding to the service to be transmitted to a base station;

wherein the network slice information comprises a plurality of network slice identifiers, the network slice information is configured for the target UE to select a network slice identifier with a highest priority from the plurality of network slice identifiers, and use a network slice corresponding to the selected network slice identifier as a target network slice to establish the connection with the base station based on the target network slice, wherein, a plurality of network slices corresponding to the plurality of network slice identifiers are located in a set of network slices supported by the UE.

9. The method according to claim 8 , wherein sending the network slice information corresponding to the service to be transmitted to the base station comprises:

adding network slice information corresponding to the service to be transmitted in a first paging signaling;

sending the first paging signaling added with the network slice information to the base station through an interface between the core network and the base station.

10. A base station, comprising:

a processor;

a memory configured to store instructions executable by the processor;

wherein the processor is configured to implement the method of claim 1 by executing the instructions stored in the memory.

11. A user equipment, comprising:

a processor;

a memory configured to store instructions executable by the processor;

wherein the processor is configured to implement the method of claim 5 by executing the instructions stored in the memory.

12. A core network device, comprising:

a processor;

a memory configured to store instructions executable by the processor;

wherein the processor is configured to implement the method of claim 8 by executing the instructions stored in the memory.