Session management method, device, and system

An intermediate session management network element comprising:

• a memory configured to store instructions;
• and
• a processor coupled to the memory and configured to execute the instructions to cause the intermediate session management network element to:
• receive, from a remote anchor session management network element, one or more local data network access identifiers (DNAIs);
• determine a target DNAI based on current location information of a terminal and the one or more local DNAIs;
• select a local user plane function network element for the terminal based on the target DNAI;
• and
• send, to the remote anchor session management network element, the target DNAI for determining a first policy and charging control (PCC) rule for the local user plane function network element.

A computer program product comprising instructions that are stored on a non-transitory computer-readable medium and that, when executed by a processor, cause an intermediate session management network element to:

• receive, from a remote anchor session management network element, one or more local data network access identifiers (DNAIs);
• determine a target DNAI based on current location information of a terminal and the one or more local DNAIs;
• select a local user plane function network element for the terminal based on the target DNAI;
• and
• send, to the remote anchor session management network element, the target DNAI for determining a first policy and charging control (PCC) rule for the local user plane function network element.