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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsJun Hirano, Mohana Dhamayanthi Jeyatharan, Chan Wah Ng, Pek Yew Tan
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The present invention provides a technique to optimize communication route when two end nodes separated away from own home perform data communication with each other. According to this technique, a communication node (the initiator node 174) adds a predetermined destination option including own home address to a header of a packet to be transmitted to a correspondent node (LFN 151) under control of MR 141. HA 121 of MR copies a predetermined destination option and inserts it into a tunnel packet header when this packet is tunneled to MR. When the packet is transferred to the communication node under control, MR checks, by using the server, whether the predetermined destination option is inserted into the tunnel packet header or not. If it is inserted into the packet, a route optimization processing is started with the transmitter of the packet including the predetermined destination option with home address.
A communication route optimization method for optimizing communication route to be performed between a first communication node and a second communication node under the control of a mobile router, wherein said method comprises the steps of:
A communication route optimization control device to be packaged on a mobile node, wherein it is so arranged that own home address or a predetermined destination option including a cryptographic key is inserted to a header of a packet relating to a message to perform route optimization on a route between a correspondent node and said mobile node.
A communication route optimization control device to be packaged on a mobile router, wherein communication between a communication node connected under own control and a correspondent node as desired is detected, and it is so arranged that a packet relating to a message to perform route optimization with said any correspondent as desired, and said packet being a packet where own home address or a predetermined destination option including a cryptographic key is inserted is transmitted to said correspondent node as desired.
A communication route optimization control device to be packaged on a home agent of a mobile router, wherein it is so arranged that, in case a predetermined destination option including information to be used for route optimization is inserted in a header of a packet to be tunneled to said mobile router, said packet is encapsulated to perform tunneling to said mobile router and said predetermined destination option is inserted into the tunnel packet header by copying said predetermined destination option to the tunnel packet header.
A communication route optimization control device to be packaged on a mobile router, wherein it is so arranged that, in case a predetermined destination option including information to be used for route optimization is inserted in a tunnel packet header of an encapsulated packet to be transferred to a communication node control, a response packet including own home address and the address of the communication node under control is transmitted.
A communication route optimization control device packaged on a mobile router, wherein said device checks a predetermined destination option included in a packet coming from outside of a mobile network under own control when the device is connected to a home link, and said device transmits said response message when a prefix of an address included in said predetermined destination option of said packet concurs with a prefix under control of said mobile router.
A communication router optimization control device to be packaged on a mobile node, wherein said device transmits a packet with a predetermined destination option inserted therein to any correspondent node as desired, and said device estimates a route to said second communication node by receiving a response message to said packet from a mobile router to pass through before the arrival of said packet at said any communication node as desired.
A communication route optimization control device to be packaged on a mobile router, wherein said device transmits a response message to a transmission source of said packet when said packet including a predetermined destination option is transferred.
A communication route optimization control device to be packaged on a mobile node, wherein said device transmits a packet to any correspondent node as desired by adding an information to a packet where a predetermined destination option is inserted, said information is to indicate that said predetermined destination option can be copied only once to an encapsulated header when said packet is encapsulated.
A communication route optimization control device to be packaged on a home agent of a mobile router, wherein said device copies said predetermined destination option to an encapsulated header at the encapsulation of said packet when a packet including an information to indicate that said predetermined destination option can be copied only once together with the predetermined destination option, and said device is designed to add an information to indicate that copying of said predetermined destination option of said encapsulated header is prohibited.
Dependencies are inferred from the claim text.