A method, apparatus and system for location update

Abstract

Embodiments of the present invention provide a location updating method, device, and system. The location updating method enables the user equipment UE to send a message to the second core network entity of the second communication system after it moves from the first communication system to the second communication system. A location update request including the first information, the second core network entity determines the third core network entity according to the first information and sends the first message including the second information to the third core network entity, so that the second core network entity determines the first The core network entity sends a second message for obtaining the context of the UE to the first core network entity. After that, the third core network entity receives the UE context sent by the first core network entity and forwards it to the second core network entity. The second core network entity updates the location after obtaining the context of the UE, so the UE does not need to re-apply for an IP address and use a new IP address to access the network, avoiding the problem of too long network interruption caused by the UE re-applying for an IP address.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular to a location updating method, device and system. Background technique [0002] During mobile communication, if UE (User Equipment, user equipment) moves from an area covered by the first mobile communication system to an area not covered by the first mobile communication system, if there is a core network between the first communication system and the third communication system interface between entities, the UE can move from the first communication system to the third communication system through reselection or handover, etc. During the movement process, the IP address (Internet Protocol Address, Internet Protocol Address) of the UE can be kept unchanged, The UE can access the network without re-initiating the attachment. During the location update process, the core network entity of the third communication system may obtain the context of the UE from t...

AI Technical Summary

Problems solved by technology

[0005] The present application provides a location update method, device and system to solve the problem in the prior art that when a UE located in the first mobile communication system moves to a second communication system, the UE needs to re-connect to the network, causing the UE network to be interrupted for too long question

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