Network element apparatus and intermediate router apparatus
First Claim
1. An intermediate router apparatus which provides access to a global network for a single or plurality of network element apparatuses, the intermediate router apparatus comprising:
- an advertising section that includes a unique global address of the intermediate router apparatus in an advertisement message that is transmitted to the single or plurality of network element apparatuses;
a generating section that generates a binding update message which contains the unique global address of the intermediate router apparatus; and
an optimal forwarding establishing section that receives packets transmitted by the said single or plurality of network element apparatuses, wherein if the received packets are marked to indicate a request for a more optimal forwarding path, the optimal forwarding establishing section sends the binding update message generated by the generating section to establish an optimal forwarding path, if an optimal path for a destination specified in the received packets is not established, whereinif the received packets are marked to indicate a request for a more optimal forwarding path, the intermediate router apparatus transmits the received packets through the optimal path if the optimal path for the destination specified in the received packets is established.
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Abstract
As an apparatus itself moves, its access section gets access to a router using a temporarily assigned global address when making a roaming connection to a different network from a network to which the apparatus belongs currently. A message generating section generates a binding update message, which contains a global address which is uniquely assigned to a network element apparatus, the above temporarily assigned global address, and a global address of the router, to transmit the generated message via the access section to a router, which is a serving router after move. This makes it possible to deliver packets among moving networks with the minimum delay to an intended recipient.
22 Citations
8 Claims
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1. An intermediate router apparatus which provides access to a global network for a single or plurality of network element apparatuses, the intermediate router apparatus comprising:
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an advertising section that includes a unique global address of the intermediate router apparatus in an advertisement message that is transmitted to the single or plurality of network element apparatuses; a generating section that generates a binding update message which contains the unique global address of the intermediate router apparatus; and an optimal forwarding establishing section that receives packets transmitted by the said single or plurality of network element apparatuses, wherein if the received packets are marked to indicate a request for a more optimal forwarding path, the optimal forwarding establishing section sends the binding update message generated by the generating section to establish an optimal forwarding path, if an optimal path for a destination specified in the received packets is not established, wherein if the received packets are marked to indicate a request for a more optimal forwarding path, the intermediate router apparatus transmits the received packets through the optimal path if the optimal path for the destination specified in the received packets is established. - View Dependent Claims (2, 3, 4)
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5. A communication method for an intermediate router which provides access to a global network for a network element, the method comprising:
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providing, by the intermediate router, access to the global network for the network element; advertising, by the intermediate router, a unique global address of the intermediate router in an advertisement message transmitted to the network element; generating, by the intermediate router, a binding update message that includes the unique global address; and receiving, by the intermediate router, a packet transmitted by the network element, wherein; if the received packet indicates a request for a more optimal forwarding path, the intermediate router communicates its generated binding update message for the purpose of establishing a more optimal forwarding path and transmits the received packet through the established, more optimal forwarding path. - View Dependent Claims (6, 7, 8)
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Specification