Patent ID: 8259649
Filing Date: 2012-09-04
Classification: H04L,H04W

Abstract:
1. A method for route optimization of packet switched data transmissions between a first mobile node and a second mobile node in a mobile communication system comprising a plurality of access networks, the method comprising the steps of: a) transmitting return routability protocol packets and data packets; b) analysing the return routability protocol packets and the data packets; and c) removing at least part of a care-of address comprised in headers of the return routability protocol packets and the data packets; wherein step c) comprises the following steps: d) deriving, by a transformation rule, a care-of address without location information from the care-of address comprised in the headers; and e) substituting the care-of address comprised in the headers with the derived care-of address without location information, and wherein steps b) and c) are carried out by a first access router with respect to a source address field of internet protocol headers.