Patent ID: 8274986

Claim:
A packet communication method for data between a home node and a destination node, which is performed via a communication network connected with an identity server (H-IS) storing a bundle of locators and a node identifier of each of nodes belonging to a home network, the method comprising: a step in which the home node provides the node identifier of the home node and requests an assignment of a locator of the home node from the identity server (H-IS); a step in which the identity server (H-IS) assigns the locator of the home node to the home node, and stores correspondence relationship between the node identifier of the home node and the locator of the home node; a step in which the home node provides the node identifier of the destination node and requests an assignment of the locator of the destination node from an identity server (dH-IS) of the destination node; a step in which the identity server (dH-IS) of the destination node assigns the locator of the destination node to the destination node, and stores correspondence relationship between the node identifier of the destination node and the locator of the destination node; a step in which a packet header, where the destination address and the home address have been specified by the node identifier of the destination node and the node identifier of the home node, is rewritten with the locator of the destination node and the locator of the home node; and a step in which the communication network conducts a routing of the packet, based on the locator of the home node and the locator of the destination node; wherein the identity server (H-IS) of the home network store special verification information on the node identifier of the home node, which is generated by introducing additional parameters in a hash function, corresponding to the node identifier of the home node.