Patent ID: 8422459
Filing Date: 2013-04-16
Classification: H04L,H04W

Abstract:
1. A route optimization method, comprising: looking up, by a current anchor device of a Mobile Node (MN), a binding list of its own management domain to judge whether a Corresponding Node (CN) and an MN have performed location registration in its own management domain; acquiring in its own management domain, by the current anchor device of the MN, location information of a current access device of the CN, if the CN and the MN have performed location registration in its own management domain; or remotely acquiring the location information of the current access device of the CN, if the CN and the MN have not performed location registration in its own management domain; sending the location information of the current access device of the CN to a current access device of the MN; and establishing a transmission tunnel between the current access device of the MN and the current access device of the CN; wherein the remotely acquiring the location information of the current access device of the CN comprises: receiving, by the current anchor device of the MN, the route optimization request sent from the current access device of the MN, wherein the route optimization request carries a constant location identifier of the CN; sending, by the current anchor device of the MN, a paging indication to a home paging control unit of the MN, wherein the paging indication carries the constant location identifier of the CN; sending, by the home paging control unit of the MN, a paging request to a home paging control unit of the CN, wherein the paging request carries the constant location identifier of the CN; and querying, by the home paging control unit of the CN, the location information of the current access device of the CN, according to the constant location identifier of the CN; sending a paging request to a visited location paging control unit of the CN, so as to acquire the location information of the current access device of the CN, when the CN is in a roaming state; and forwarding the location information of the current access device of the CN to the current anchor device of the MN.