A METHOD, SYSTEM, MOBILITY MANAGEMENT ENTITY (MME) AND NON-3GPP GATEWAY FOR UE DETACHMENT WHEN A HANDOVER OCCURS BETWEEN A 3GPP NETWORK AND A NON-3GPP NETWORK

摘要

A method for user detachment when a handover or change occurs in a heterogeneous network is provided. The method includes: a user equipment (UE) is handed over or switched from a source network to a target network; a network element on a network side determines whether to detach the UE from the source network, and if yes, the network element on the network side detaches the UE from the source network, otherwise, the network element on the network side does not detach the UE from the source network. A system and a device for user detachment when a handover or change occurs in a heterogeneous network, and another method for user detachment when a handover or change occurs in a heterogeneous network are also provided. The detachment solutions achieve the detachment of the UE from the source network and the detachment of the UE from the source network by the network side when the UE is handed over or switched from the source network to the target network.