COMMUNICATION SYSTEM AND METHOD FOR PATH CONTROL
First Claim
1. A communication system comprising:
- a data transfer apparatus;
a first gateway for communicating with the data transfer apparatus;
a second gateway that is an apparatus which is an alternative to the first gateway; and
a path control unit that controls communication paths between the data transfer apparatus and the first and second gateways, whereinwhen the path control unit detects a failure condition in the first gateway, the path control unit transfers data transferred from the data transfer apparatus to the first gateway to the second gateway and notifies the second gateway of session information that is set to the first gateway.
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Abstract
An object is to provide a communication system that can avoid a service interruption caused by a device failure, a congestion and the like inside a cell phone system. The communication system according to the present invention includes a data transfer apparatus (11), a gateway (12) for communicating with the data transfer apparatus (11), a gateway (13) that is an alternative apparatus of the gateway (12), and a path control apparatus (14) for controlling a communication path between the data transfer apparatus (11) and the gateways (12) and (13). When the path control apparatus detects a failure condition in the gateway (12), the path control apparatus controls the data transfer apparatus (11) to transfer data that is transferred from the data transfer apparatus (11) to the gateway (12) to the gateway (13) and also notifies the gateway (13) of session information that is set to the gateway (12).
35 Citations
20 Claims
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1. A communication system comprising:
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a data transfer apparatus; a first gateway for communicating with the data transfer apparatus; a second gateway that is an apparatus which is an alternative to the first gateway; and a path control unit that controls communication paths between the data transfer apparatus and the first and second gateways, wherein when the path control unit detects a failure condition in the first gateway, the path control unit transfers data transferred from the data transfer apparatus to the first gateway to the second gateway and notifies the second gateway of session information that is set to the first gateway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for path control comprising
detecting a failure condition in a first gateway, the first gateway communicating with a data transfer apparatus; - and
transferring data to be transferred from the data transfer apparatus to the first gateway to a second gateway, and notifying the second gateway of session information, the second gateway being an apparatus which is an alternative to the first gateway, and the session information being set to the first gateway. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A path control apparatus comprising:
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a path control unit that controls communication paths between a data transfer apparatus and a first and a second gateways, the first gateway communicating with the data transfer apparatus and the second gateway being an apparatus which is an alternative to the first gateway, wherein when the path control unit detects a failure condition in the first gateway, the path control unit transfers data transferred from the data transfer apparatus to the first gateway to the second gateway and notifies the second gateway of session information that is set to the first gateway.
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Specification