| 摘要 |
PROBLEM TO BE SOLVED: To reduce an amount of traffic of a communication network by reducing an amount of signals for location registration of MN (Mobile Node) when a plurality of HAs (Home Agents) exist in a home network. SOLUTION: The HA connected to the same home network identifies neighboring search signals from other HAs by holding a link layer address of the HA connected to the same home network, when the neighboring search signals are the ones in discovery of duplicated addresses to be executed in the case that the location registration is requested in the HA, recognizes that the location registration of home addresses in the neighboring search signals is performed, deletes a binding cache held in the self device and avoid response to the neighboring search signals. In addition, loss of a replay defense function of Binding Update is avoided by taking compliance by sequence numbers by imparting the sequence numbers to the neighboring search signals. COPYRIGHT: (C)2005,JPO&NCIPI
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