Flexible mobility framwork for heterogeneous roaming in next generation wireless networks

A method for mobility support of a mobile node having a home network in a heterogeneous roaming environment, said method 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 more than one 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;
• and
• generating a SIP signaling address for SIP, a SIP media address for SIP media, and a non-SIP media address for non-SIP media using the home address;
• wherein SIP signaling is transmitted using a first of the security connections to the SIP media address, SIP media is transmitted using a second of the security connections to the SIP media address and non-SIP media is transmitted using a third of the security connections to the non-SIP media address.

A system for mobility support of a mobile node having a home network in a heterogeneous roaming environment, said system comprising:

• a visited network authenticating the mobile node and determining an address for the mobile node;
• a security connection between a functional component in the visited network and an agent in the home network;
• a home address for the mobile node;
• a SIP signaling address generated using the home address;
• a SIP media address generated using the home address;
• and
• a non-SIP media address generated using the home 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.

A system for mobility support of a mobile node having a home network in a heterogeneous roaming environment, said system comprising:

• a visited network authenticating the mobile node and determining an address for the mobile node;
• a plurality of security connections between a functional component in the visited network and an agent in the home network;
• a home address for the mobile node;
• a SIP signaling address generated using the home address;
• a SIP media address generated using the home address;
• and
• a non-SIP media address generated using the home address,
• wherein SIP signaling is transmitted using a first of the plurality of security connections to the SIP signaling address, SIP media is transmitted using a second of the plurality of security connections to the SIP media address, and non-SIP media is transmitted using a third of the plurality of security connection to the non-SIP media address.