METHOD FOR REALIZING LOCATION UPDATE, SERVICE SUPPORT NODE AND VISITOR LOCATION REGISTER THEREOF

摘要

The present invention provides a method for implementing a location update, a servicing GPRS support node, and a visitor location register. The method includes: receiving a routing area update request message which includes a mixed location update indication and a routing area identification RAI and is sent by a serving radio network subsystem SRNS, and performing, at least according to the RAI, a routing area update; at least according to the routing area update request message, obtaining a location area identification LAI and an address of a visitor location register VLR which are of a 2G network system where a mobile terminal is located; and sending the location area update request message, which carries at least the mixed location update indication and the LAI, to the VLR corresponding to the address of the VLR, so that the VLR corresponding to the address of the VLR implements a location area update, at least according to the location area update request message. In the embodiments of the present invention, a location area update in a 2G network system is implemented at the same time of performing a routing area update in a 3G network system, reducing consumption of electrical power of a mobile terminal.