Patent ID: 8385347

Claim:
A mobile node, comprising: a transmitting part transmitting a frame requesting IP address allocation information needed to obtain an IP address in a neighboring network; a receiving part receiving a frame comprising the IP address allocation information requested in the transmitted frame, and wherein the mobile node obtains an IP address in the neighboring network based on the IP address allocation information in the received frame to move to the neighboring network, wherein the IP address allocation information comprises information about a method of allocating an IP address used in the neighboring network, and wherein the information about a method of allocating an IP address used in the neighboring network is represented by a plurality of bits comprising at least one of: at least one bit for indicating that the method of allocating an IP address used in the neighboring network is an IPv4 static configuration method; at least one bit for indicating that the method of allocating an IP address used in the neighboring network is an IPv4 dynamic configuration method; at least one bit for indicating that the method of allocating an IP address used in the neighboring network is an IPv6 stateful address configuration method that keeps track of allocated address information; at least one bit for indicating that the method of allocating an IP address used in the neighboring network is an IPv6 stateless address configuration method that does not keep track of allocated address information; and at least one bit for indicating that the method of allocating an IP address used in the neighboring network is an IPv6 manual configuration method.