A SYSTEM AND METHOD FOR PROVIDING SECURE MOBILITY AND INTERNET PROTOCOL SECURITY RELATED SERVICES TO A MOBILE NODE ROAMING IN A FOREIGN NETWORK

摘要

The present invention is related to the scenario where a Mobile Node (MN) in roaming needs to connect to Network Gateway (NGW) for providing secure data path using IP security procedure. Also Mobile IP is required for providing mobility to the user, when the MN moves from one sub-network to another. However, when the Home Address of the network is not known, a cyclic interdependency is observed between the IPsec procedures and Mobile IP procedures. If the home address of the MN is not known initially during the procedure, IPsec SA's are formed between the MN and NGW such that only Mobile IP packets are passed through. After the Mobile IP Registration is completed, the Home Address of the MN is known from the MIP registration Reply. MN now forms a data path tunnel with the NGW by exchanging create child SA messages. Thus the MN can be proviqed with both security as well as the Mobility related services. .