Patent ID: 8625551
Filing Date: 2014-01-07
Classification: H04W

Abstract:
1. A method for mobility support of a mobile node having a home network in a heterogeneous roaming environment, said method performed on a processor comprising the steps of: authenticating the mobile node in a visited network and obtaining an address for the mobile node in the visited network; establishing a security connection between a functional component in the visited network and an agent in the home network; creating a home address for the mobile node during SIP registration comprising a prefix and an interface-id; and generating, using the home address, a SIP signaling address, a SIP media address, and a non-SIP media address; wherein SIP signaling is transmitted using the security connection to the SIP signaling address, SIP media is transmitted using the security connection to the SIP media address, and non-SIP media is transmitted using the security connection to the non-SIP media address and when the mobile node moves to another visited network, the generated SIP signaling address, the generated SIP media address, and the generated non-SIP media address continue to be used, wherein the another visited network is one of a new carrier or the visited network and the another visited network are within the same carrier network where the another visited network is other than the authenticating visited network, or the mobile node moves from one carrier network to another carrier network while away from the home domain.