Patent ID: 7493652

Claim:
A method of sending a mobile node address update to a corresponding node, comprising: multicasting, from a mobile node, a secure router solicitation to one or more access routers, the secure router solicitation including a router solicitation nonce field populated with an identifier of the mobile node; in response to the secure router solicitation, receiving from an access router a secure router advertisement at the mobile node, the secure router advertisement including a router advertisement nonce field which includes a copy of a value of the router solicitation nonce field, the value of the router solicitation nonce field being the identifier of the mobile node sent in the secure router solicitation; attaching, at the mobile node, the secure router advertisement to an address update to be sent to a correspondent node, wherein the secure router advertisement includes the router advertisement nonce field populated with the identifier of the mobile node; and sending the address update including the attached secure router advertisement to a correspondent node.