Route optimization method and agent apparatus
First Claim
Patent Images
1. A route optimization method for a communication system that allows communication between a mobile terminal and a correspondent terminal, for optimizing a route for communication between the correspondent terminal and the mobile terminal when the mobile terminal moves across network domains, comprising the steps of:
- causing a foreign agent or a home agent of a network domain to which the correspondent terminal currently belongs to receive a Binding Update Message from a home agent for the mobile terminal and to forward a packet destined for the mobile terminal to a care-of address of the mobile terminal specified in the Binding Update Message.
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Abstract
A foreign agent to which a correspondent terminal is attached receives a Binding Update Message from a home agent so that the foreign agent encapsulates an IP packet destined for a mobile terminal 11 before transmission thereto.
73 Citations
17 Claims
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1. A route optimization method for a communication system that allows communication between a mobile terminal and a correspondent terminal, for optimizing a route for communication between the correspondent terminal and the mobile terminal when the mobile terminal moves across network domains, comprising the steps of:
causing a foreign agent or a home agent of a network domain to which the correspondent terminal currently belongs to receive a Binding Update Message from a home agent for the mobile terminal and to forward a packet destined for the mobile terminal to a care-of address of the mobile terminal specified in the Binding Update Message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An agent apparatus for a communication system in which a mobile terminal communicates with a correspondent terminal, operated as a foreign agent or a home agent for a network domain to which the correspondent terminal belongs, comprising:
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a receiver for receiving a Binding Update Message from a home agent for the mobile terminal; and
a transmitter for forwarding a packet destined for the mobile terminal to a current care-of address of the mobile terminal designated in the Binding Update Message.
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Specification