Paging method and device for IMS network under multiple registrations and network side equipment

Abstract

The invention provides a paging method and device for an IMS (IP Multimedia Subsystem) network under multiple registrations and network side equipment. The method comprises the following steps: initiating IMS service paging to UE; querying whether the UE is registered in the IMS network; and when the UE is successfully registered in the IMS network, selecting a recently accessed network to initiate paging to the UE when the UE registers the IMS network, and if paging fails, initiating paging to the UE through other accessed networks, or simultaneously initiating paging to the UE through a plurality of accessed networks used when the UE registers the IMS network. According to the invention, the IMS network can successfully page the UE when the IMS service is initiated to the UE in a multi-registration scene.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a paging method, device and network side equipment of an IMS network under multiple registrations. Background technique [0002] For E-UTRAN (Evolved UMTS Terrestrial Radio Access Network, evolved UMTS Terrestrial Radio Access Network) (that is, 4G) and NG-RAN (Next Generation Radio Access Networks, next-generation radio access network) (or 5G- RAN, that is, 5G) does dual-registration UE (User Equipment, user equipment), UE is in the 4G core network MME (Mobility Management Entity, mobility management entity) and 5G core network AMF (Access and Mobility Management Function, access and mobility management functions) are registered separately. [0003] Such as figure 1 As shown, when the UE registers in 4G, the UE attaches to the MME network through E-UTRAN, and the MME notifies the user database HSS (Home Subscriber Server, Home Subscriber Server) that the...

AI Technical Summary

Problems solved by technology

[0007] When the UE registers on the IMS network through the 5G network and recently accesses the 4G core network through the E-UTRAN, or the UE registers on the IMS network through the 4G network and recently accesses the 5G core network through the 5G access network, the network initiates a call to the UE When the VoIMS service is paging, the VoIMS service paging fails because the access network used by the UE for IMS registration is inconsistent with the last access network.

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