| 摘要 |
A registration method in a system having a hierarchical structure ( 100 ) that includes a mobile node ( 20 ), at least one FA ( 42 ), at least one GFA ( 40 ) and an HA ( 30 ). The method includes the steps of: intercepting ( 210 ) a registration request ( 300 ) from a mobile node to its HA, the registration request including a first care of address ( 360 ) for the mobile node; determining ( 220 ) whether there is an existing entry in a visitor list for the mobile node; if the entry exists, updating ( 230 ) the entry; if no entry exists, creating an entry ( 250 ) in the list for the mobile node, adding ( 260 ) a second care of address as an extension to the registration request, and sending ( 270 ) the registration request with the address extension to the HA; and sending ( 240 ) a registration reply to the mobile node.
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