A METHOD AND SYSTEM FOR ACQUIRING THAT SGSN HAS STARTED SINGLE TUNNEL BY GGSN IN A PACKET DOMAIN

摘要

A method for acquiring that SGSN (30) has started a direct tunnel by GGSN (40) in a packet domain is provided, the method comprises: a step of setting mark, wherein in a tunnel establishing process, SGSN sets a direct-tunnel mark in a request message of updating PDP context sent to GGSN (40) to indicate whether SGSN (30) has started the direct tunnel if SGSN (30) has started the direct-tunnel scheme; a step of determining mark, wherein GGSN (40) indicates that SGSN (30) has started the direct tunnel and acquires an address and user plane tunnel information of RNC (20) included in the request message of updating PDP context if GGSN (40) determines that the received request message of updating PDP context has the direct-tunnel mark. A system for acquiring that SGSN (30) has started a direct tunnel by GGSN (40) in a packet domain is provided, a mark setting module is added in SGSN (30), and a mark determining module is set in GGSN (40).