Mobile communication network system for managing the location of a mobile IP terminal
First Claim
1. A mobile communication network system comprising a plurality of nodes including a home agent, a correspondent node, and a mobility anchor point connected to the network,wherein each node produces a duplication of a binding cache on receipt of location registration information from a mobile terminal, maintains and manages the duplication of the binding cache for backup purposes, andon restoration of the node from a failure, each node obtains the contents of the binding cache as generated and stored before the node failure from the duplicated binding cache,wherein the node transmits a location registration request to the mobile terminal in accordance with the contents of the binding cache obtained as generated before the node failure, and when no response is received against the location registration request, the node determines the obtained binding cache as invalid, and deletes the location information of said mobile terminal.
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Accused Products
Abstract
When a failure occurs in a node managing the location information of mobile node MN, it is possible to resume packet transfer from correspondent node CN to mobile node MN after the node is restored from the failure, in a mobile communication network. The mobile communication network includes a plurality of nodes including a home agent, a correspondent node, and a mobility anchor point connected to the network, wherein each node produces a duplication of a binding cache on receipt of location registration information from a mobile terminal, maintains and manages the duplication of the binding cache, and on restoration of the node from a failure, each node obtains the contents of the binding cache stored before the node failure from the duplicated binding cache.
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Citations
6 Claims
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1. A mobile communication network system comprising a plurality of nodes including a home agent, a correspondent node, and a mobility anchor point connected to the network,
wherein each node produces a duplication of a binding cache on receipt of location registration information from a mobile terminal, maintains and manages the duplication of the binding cache for backup purposes, and on restoration of the node from a failure, each node obtains the contents of the binding cache as generated and stored before the node failure from the duplicated binding cache, wherein the node transmits a location registration request to the mobile terminal in accordance with the contents of the binding cache obtained as generated before the node failure, and when no response is received against the location registration request, the node determines the obtained binding cache as invalid, and deletes the location information of said mobile terminal.
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3. A mobile communication network system comprising a plurality of nodes each connected to the network,
wherein, when a mobile terminal moves from a particular node to another different node, said mobile terminal obtains from an external link a node address after the movement as a care-of address, and transmits the obtained care-of address to the particular node as location registration information, the particular node registers the location registration information into a binding cache, manages the location registration information, duplicates the contents of the binding cache for backup purpose, and maintains and manages the duplicated contents of the binding cache, and when the particular node is restored from a failure and initiated for restoration, the particular node transmits a location registration request to the mobile terminal which is registered in the duplicated contents of the binding cache, and when no response is received from the mobile terminal against the location registration request, the node deletes the location information of the mobile terminal from the binding cache.
Specification