Patent ID: 6621810
Filing Date: 2003-09-16
Classification: H04W

Abstract:
In a router supporting Mobile IP, a method of registering a mobile node with a Home Agent via a Foreign Agent, the method comprising:receiving a registration request packet, the registration request packet specifying a Home Address and a care-of address; ascertaining from the registration request packet whether the router includes a Home Agent associated with the mobile node; if it is ascertained from the registration request packet that the router does not include the Home Agent, forwarding the registration request packet to the Home Agent, wherein the Home Agent is external to the router; determining whether the care-of address specified in the registration request packet is equivalent to a Foreign Agent address associated with the router; and if it is ascertained from the registration request packet that the router includes the Home Agent and it is determined that the care-of address specified in the registration request packet is equivalent to the Foreign Agent address associated with the router, registering the mobile node visiting a Foreign Agent of the router with a Home Agent of the router.