| 摘要 |
A communication system in which a mobile node MN communicates with a home agent HA using a first Care-of-Address (CoA-LR) that corresponds to a first wireless coverage area and communicates with a correspondent node (CN) using a second Care-of-Address (CoA-C) that corresponds to a second wireless coverage area. The first wireless coverage area may be a wide area network, such as a cellular based network and the second coverage area may be a small coverage system like a Bluetooth or 802.11 network. The second coverage area is a subset of the first coverage area. The MN does not need to send binding updates to the Home Agent while it stays in the first coverage area, even if it moves from the second coverage area to a third coverage area.
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