Method for dynamically generating AMF slice set in 5G core network

Abstract

The invention provides a method for dynamically generating an AMF slice set in a 5G core network. The method comprises the steps when the base station slice information is changed, the base station sends a message to the AMF; the AMF submits the received message content to the NSSF through a slice updating message; and the NSSF calculates and generates an AMF slice set and a slice set supported bythe AMF under each base station according to the slice set supported by the base station in combination with a slice set supported in an operator strategy, returns the slice set supported by the AMFunder each base station to the base station through the AMF, and updates the AMF slice set to the NRF. The AMF slice set can be dynamically generated according to the slice set of each TA under the accessed base station and an operator strategy, a network administrator does not need to re-plan and re-configure, and the network management efficiency is improved. Moreover, the AMF selection accuracycan be improved, AMF redirection is reduced, and the network efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of 5G mobile communication, in particular to a method for dynamically generating an AMF slice set by a 5G core network. Background technique [0002] In the 5G network, the concept of network slicing (Network Slicing, NS) is introduced, and the 5G physical network is divided into logical slice networks through network slicing. The access and mobility management network element AMF of the signaling plane in the 5G core network (abbreviated as 5GC) may belong to one or more slice networks. The network slice to which the AMF belongs is determined by the corresponding AMF slice set NSSAI configured on the network slice selection function NSSF. [0003] A single network slice selection assistance information S-NSSAI is used in 5G networks to identify a network slice, and multiple S-NSSAIs can be combined into a network slice selection assistance information set NSSAI. Defined in the TS 3GPP 23501-g30 agreement,...

AI Technical Summary

Problems solved by technology

Therefore NSSAI (AMF) It is necessary to maintain dynamic consistency with the slice resources supported by AMF, otherwise the AMF reselection process will often occur, reducing network efficiency, and even selecting an AMF that does not own a certain slice resource to serve the corresponding slice for the UE, causing network errors

And when the AMF slice set and slice resources are inconsistent, some slice resources cannot be used, wasting network resources

[0004] In the current TS 3GPP 23501-g30 agreement, there is no description of the generation method of the AMF slice set, which can be statically configured according to the operator's policy, but the static configuration has the following disadvantages: When the terminal user equipment UE registers with the 5GC, if the registered The slice set configured by AMF is inconsistent with the network resources it owns, and the AMF reselection process will often be performed, which will reduce network efficiency, and may even cause network errors because the AMF that does not actually have a certain slice resource is selected to provide services, and when the configured When the number of supported slices is less than the slice resources actually owned by AMF, some slice resources may not be utilized and be wasted; when AMF adds a new network slice resource, the slice set configured by AMF needs to be changed, otherwise the newly added AMF Network slice resources will not be used. When the network resources owned by AMF do not support certain slices, if the slice set configured by AMF is not modified in time, the wrong AMF will be selected. Therefore, every time a network resource is modified, the AMF slice set Both need to be modified. When the number of AMFs is relatively large and the network deployment is complicated, the burden on the network administrator will be greatly increased.

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