Patent ID: 7969945

Claim:
A communication system with mobility management for communicating with mobile nodes comprising: a first access gateway configured to obtain security information from at least one server and to send an address response with a dynamically assigned IP address to a mobile node in response to receiving an address request from the mobile node and to pre-clear itself with at least one server so that the first access gateway is included in a domain of trust; the first access gateway sending to a second access gateway information including security information regarding the mobile node, when the mobile node is being handed off from the first access gateway to the second access gateway, wherein the information allows the second access gateway to maintain the same dynamically assigned IP address for the mobile node, wherein the first access gateway establishes that the second access gateway is in the domain of trust after the second access gateway undergoes a pre-clearance so both the first access gateway and the second access gateway are in the domain of trust allowing the first access gateway to communicate security information in a secure fashion to the second access gateway during a handoff of the mobile node.