Method, system and equipment for releasing gateway address of public data network

Abstract

The invention discloses a method for releasing gateway PDN GW address of public data network. The method comprises: a mobility management entity (MME) determines that a user equipment (UE) has started a detachment process, and notifies home subscriber server (HSS) to delete the saved PDN GW address corresponding to UE. The invention further discloses a system and equipment for releasing PDN GW address. The scheme in the invention enables UE to delete the PDN GW address corresponding to UE saved in HSS while 3GPP performs detachment process in the accessed system, in this way, enables the UE to perform the PDN GW selection process normally when initially accesses again.

Description

technical field [0001] The present invention relates to network switching technology, in particular to a method, system and equipment for releasing the address of a Public-Data Networks Gateway (PDN GW, Public-Data Networks Gateway) during the network switching process. Background technique [0002] During the handover process between the Third Generation Partnership Project (3GPP, the Third Generation Partnership Project) access system and the non-3rd Generation Partnership Project (non-3GPP) access system, in order to ensure that the PDN GW remains unchanged, an initial The PDN GW address is stored in the Home Subscriber Server (HSS, Home Subscriber Server) during access. The situation of saving the PDN GW address in the HSS during the initial access process includes: if the user equipment (UE, User Equipment) initially accesses from the 3GPP access system, the mobility management entity (MME, Mobility Management Entity) will PDN The GW address notifies the HSS through th...

AI Technical Summary

Problems solved by technology

[0027] In the process of switching UE from a 3GPP access system to a non-3GPP access system, the PDN GW address of the corresponding UE saved by the HSS needs to be kept unchanged. The PDN GW address corresponding to the UE remains unchanged, and the PDN GW address corresponding to the UE saved by the HSS cannot be deleted. figure 2 The process does not provide relevant solutions

[0028] It can be seen from the above analysis that there are at least the following problems in the prior art during the network handover process: when the UE performs the detach process of the 3GPP access system, the resource release process initiated by the UE does not release the PDN GW corresponding to the UE stored in the HSS address, causing the UE to fail to perform PDN GW selection normally when it initially accesses again

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