Patent ID: 7773552
Filing Date: 2010-08-10
Classification: H04L,H04W

Abstract:
1. A mobile communication system, comprising: a home agent which transfers a communication packet to a mobile communication device connected to a foreign network; an address management section which manages a plurality of IP addresses; an address generation section which assigns any of the IP addresses managed by the address management section to the mobile communication device as a home address thereof; a memory device which stores the home address of the mobile communication device and an identifier of the mobile communication device in association with each other; and a source node which transmits the communication packet to a mobile communication device having the home address stored in the memory device as a destination, wherein the memory device is configured for attachment to and detachment from the source node, the home agent and the mobile communication device share a first authentication key, the memory device and the mobile communication device share a second authentication key, and the mobile communication device comprises an authentication section which, upon receipt of the communication packet from the home agent, performs authentication of the home agent using the first key and authentication of the source node using the second key.