| 摘要 |
A call handover method for an Internet Protocol (IP) communication network using hierarchical routing comprising first and second mobility anchor points (P 1 , P 2 ) connected to respective first and second access routers (R 1 , R 2 ) and a home agent (EA) of a mobile first node (T 1 ) communicating with a second node (T 2 ) consists in, when the mobile first node (T 1 ) detects the second access router (R 2 ): i) determining the address prefix of the second access router (R 2 ) in order to communicate it to the mobile first node (T 1 ) in order for the latter to construct additional local and regional care-of addresses, ii) communicating the additional local care-of address to the first anchor point (P 1 ) in order for it to set up a temporary tunnel (TU) to the second access router (R 2 ) in order to forward packets addressed to the mobile first node (T 1 ) to the second access router (R 2 ), iii) connecting the mobile first node (T 1 ) to the second access router (R 2 ) in order to forward to it the packets received via the temporary tunnel (TU), and iv) communicating the additional local and regional care-of addresses of the mobile first node (Ti) to the second anchor point (P 2 ) and to the home agent equipment (EA) in order for them to substitute them for the previous ones.
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