Patent ID: 7602747

Claim:
An apparatus, comprising: a network including an overlap router communicatively coupled to a mobility anchor point and to a plurality of access routers, each of the plurality of access routers including a local database and having a different subnet prefix address, each of the plurality of access routers is configured to receive one or more measurement reports from one or more mobile nodes including information with respect to which of the plurality of access routers a given mobile node can have communication with; each of the access routers is configured to compare received measurement reports to one or more thresholds stored in the local database coupled to the access router, and to communicate to the given mobile node an advertisement messages including a subnet prefix of each of the plurality of access routers that the given mobile node has a good communication link with based on the received one or more measurement reports; the mobility anchor point is configured to be communicatively coupled to any of the given mobile nodes through one or more of the plurality of access routes and through the overlap router, the mobility anchor point is configured to be a local home agent for each of the given mobile node and to receive from each of the given mobile nodes a local binding update and a listing of all of the subnet prefixes for which the given mobile node has a good communication link established with, the mobility anchor point is configured to configure a Regional Care of Address for the given mobile node, the Regional Care of Address information is configured to allow one or more devices outside the network to have communication through the mobility anchor point with the given mobile node associated with the Regional Care of Address without having to know any of the subnet prefixes assigned to the given mobile node; the overlap router is configured to receive data items addressed to the Regional Care Address of a particular mobile node, to re-address the data to include any of the at least one subnet prefixes sent to the mobility anchor point for the particular mobile node, and to n-cast the data items to all of the plurality of access routers that have subnet prefixes assigned to the particular mobile node.