Patent ID: 7610393

Claim:
A method of establishing a session between a correspondent node and a mobile node, the mobile node having a home address in a home network and being temporarily connected at a care-of address in a foreign network, the session being a quality of service session between the correspondent node and the mobile node, the method comprising the steps of: generating, in the foreign network, a modified reply message of an Internet Protocol packet having a source address of the mobile node's care-of address in place of the mobile node's home address and having a destination address of the correspondent node; transmitting the modified reply message to the correspondent node; and receiving a modified request message in the foreign network, the modified reply message being generated in response to the receipt of the modified request message in the foreign network, the modified request message being created by replacing a destination address of a request message received in the home network with the mobile node's care-of address, the request message received in the home network having a source address of the correspondent node and a destination address of the mobile node's home address; and wherein the quality of service session is an RSVP session, the request message is a Path message, and the modified reply message is a Reservation message.