Method and apparatus for accessing old network through temporary id of evloved network

a technology of evolved network and temporary id, applied in the field of mobile communication technologies, can solve problems such as single point failure and inability to perform communication

Inactive Publication Date: 2010-04-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0026]when a UE moves from an evolved network to an old network, MME information for uniquely identifying an MME is added to an access message sent to the old netwo

Problems solved by technology

Thus, problems such as single point failure exist.
If an SGSN is down, a UE in the serv

Method used

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  • Method and apparatus for accessing old network through temporary id of evloved network
  • Method and apparatus for accessing old network through temporary id of evloved network
  • Method and apparatus for accessing old network through temporary id of evloved network

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Embodiment Construction

[0040]Embodiments of the invention are hereinafter described in detail with reference to the accompanying drawings.

[0041]A TMSI / P-TMSI is introduced to prevent a permanent ID, namely, an International Mobile Subscriber Identity (IMSI), from being exposed on an air interface and thus being tracked, so as to protect subscriber privacy. The TMSI is unique in an LA or RA of a UE (LA in a CS domain and RA in a PS domain; one LA may include several RAs). Thus, when the UE accesses a network, the TMSI / P-TMSI is taken as the user ID. In addition, the TMSI / P-TMSI has the following function: when the UE accesses a new CN node and the flex concept is not introduced, the new CN node searches old nodes for the context of the UE through a Location Area Identity (LAI) or Routing Area Identity (RAI). A many-to-many relationship between AN devices and CN devices exists on the flex, and therefore, it is insufficient to search old nodes according to the LAI or RAI. Old nodes must be determined accordi...

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Abstract

A method for accessing an old network through a temporary ID of an evolved network includes these steps: a User Equipment (UE) adds Mobility Management Entity (MME) information for uniquely identifying an MME accessed by the UE on an evolved network to an access message sent to an old network when the UE accesses the old network through a temporary ID of the evolved network; and the old network selects a corresponding Serving GPRS Support Node (SGSN) for the UE according to the access message. After the MME information for uniquely identifying an MME is added to the access message sent to the old network, the old network can determine and find the MME that is accessed by the UE in the evolved network without changing a Radio Network Controller (RNC) and an SGSN on the old network. In addition, with the method for accessing the evolved network through a temporary ID of the old network, a combined SGSN/MME can be accessed to prevent unnecessary node relocation.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of International Application No. PCT / CN2008 / 072864, filed on Oct. 28, 2008, which claims priority to Chinese Patent Application No. 200710166066.8, filed on Nov. 1, 2007 and Chinese Patent Application No. 200810091433.7, filed on Apr. 11, 2008, all of which are hereby incorporated by reference in their entireties.FIELD OF THE INVENTION[0002]The present invention relates to mobile communication technologies, and in particular, to a method and apparatus for accessing an old network through a temporary ID of an evolved network.BACKGROUND OF THE INVENTION[0003]A Universal Mobile Telecommunication System (UMTS) is a 3G wireless communication network standard defined by the Third Generation Partnership Project (3GPP). A UMTS network consists of a Core Network (CN) and an Access Network (AN). The CN consists of a Circuit Switched (CS) domain and a Packet Switched (PS) domain. The CS domain provides CS-based ser...

Claims

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Application Information

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IPC IPC(8): H04W60/00
CPCH04W8/26H04W36/0033H04W88/14H04W36/10H04W74/00H04L61/4588H04W88/005
Inventor GUO, XIAOLONG
Owner HUAWEI TECH CO LTD
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