Method, device and system for recovering data after restarting of device

Abstract

The embodiment of the invention discloses a method, a device and a system for recovering data after restarting of a device. The method of the embodiment of the invention comprises the following steps: detecting the restarting of a first network mobility management network element, determining user equipment (UE) related with the first network mobility management network element, sending information which is carried with context information of the UE to the first network mobility management network element by a second mobility management network element, and recovering the context of the UE by the first network mobility management network element according to the acquired context information. Because the context of the UE in the device is recovered after the device is restarted, SGSN can receive a position updating request of the UE when the subsequent UE initiates position updating flow, and avoids the UE initiating attachment flow again; therefore, idle signaling can be reduced, and idle signaling load can be reduced.

Description

technical field [0001] The invention relates to the technical field of communication, and in particular to a data recovery method, device and system after a device is restarted. Background technique [0002] In an existing General Packet Radio Service / Universal Mobile Telecommunications System (GPRS / UMTS, General Packet Radio Service / Universal Mobile Telecommunications System) system, a Packet Switched Domain (PS, Packet Switched Domain) includes a Serving General Packet Radio Service Support Node (SGSN, Serving GPRS Supporting Node) and Gateway General Packet Radio Service Supporting Node (GGSN, Gateway GPRS Supporting Node), etc. Among them, the core function of SGSN is to realize functions such as route forwarding, mobility management, session management and user information storage. The GGSN is mainly used to interface with the external network, and is also used to realize the transmission of user plane data. [0003] In the prior art, when the SGSN fails and restarts,...

AI Technical Summary

Problems solved by technology

[0004] During the research and practice of the existing technology, the inventor found that in the prior art, since the SGSN deletes the UE context, the SGSN will reject the UE location update procedure when the UE has a location update procedure, for example, the UE sends a route When the area update request message is sent to the SGSN, the SGSN will send a location update rejection message to the UE, which will cause the UE location update procedure to fail

After receiving the location update rejection message, the UE will resend the attach request message to the SGSN, which will cause a large increase in air interface signaling and greatly increase the signaling load of the air interface.

[0005] In addition, because the GGSN deletes all the PDP contexts of the UE, the UE needs to re-initiate the establishment of the UE context, which will cause the original Internet Protocol (IP, International Protocol) address used by the UE to change, and the services originally used by the UE cannot continue to be used. of business will be disrupted, impacting user experience

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