AMF redirection method based on slice priority and newly added management network element

Abstract

The invention provides an AMF redirection method based on slice priority, a newly added management network element, computer equipment and a storage medium, and the method comprises the steps that thenewly added management network element obtains a first AMF selectable set allocated to a terminal by a core network at a network side when the terminal is migrated from a first base station to a second base station; a second AMF selectable set is obtained on the terminal side, the second AMF selectable set comprises a plurality of AMFs corresponding to the S-NSSAIs connected before terminal migration, and the AMFs are grouped and sorted according to the comprehensive priorities of the S-NSSAIs corresponding to the AMFs; obtaining the performance of each AMF in the first AMF selectable set andthe second AMF selectable set; and according to the first AMF selectable set, the second AMF selectable set and the performance of each AMF in the first AMF selectable set and the second AMF selectable set, selecting one AMF as a redirected target AMF. According to the technical scheme, the optimal AMF can be selected as the redirected AMF, and the slicing quality is guaranteed.

Description

technical field [0001] The present disclosure belongs to the technical field of communication, and in particular relates to an AMF redirection method based on slice priority, a newly added management network element, a computer device, and a computer-readable storage medium. Background technique [0002] 5G terminals can access multiple network slices at the same time. When registering the slice service, the NSSF (Network Slice Selection Function) entity will request NSSAI (Network Slice Selection Assistance Information, Network Slice Selection Assistance Information) (S- NSSAI (Single Network Slice Selection Auxiliary Information) set) selects an appropriate AMF (Access and Mobility Management Function, access and mobility management function) (or an optional AMF set) for mobility management. If the location of the terminal changes significantly, and the terminal jumps from the old gNB (5G base station) to the new gNB, the core network side will also initiate an AMF redirec...

AI Technical Summary

Problems solved by technology

However, during the process of AMF redirection in the new geographical location, the AMF set to meet the load balancing conditions may not be able to simultaneously satisfy the multiple slice services required by the terminal

In the prior art, the newly switched gNB selects AMF for the terminal to access the core network, which is based on the optional AMF set pointer carried by the terminal itself (allocated by the core network in the old gNB and old TA (Tracking Area) area) , if the AMF set pointer is not carried in the signaling, then the network side will match the appropriate AMF for the terminal according to the user subscription rules and the load level of the AMF; however, the optional AMF set pointer allocated by the network side or carried by the terminal itself is not based on the actual The best solution for scheduling based on scenarios or user needs. If the AMF is relocated to a target AMF with a farther routing path, or redirected to an overloaded AMF to ensure that all terminal slices can be accessed, this is the case for Urllc (Ultra-relaible and Low Latency Communication, extremely reliable low-latency communication) business experience is poor, it is difficult to meet the actual business needs of users

Images