Method and apparatus for designing backup communication path, and computer product
First Claim
1. A backup communication path design method in which backup communication path information is previously registered in each communication node of a communication network having a plurality of communication nodes, when a communication link failure or communication node failure occurs, a failure-detected communication node transmits a failure notification message containing failure portion information to the each communication node and a communication node which has received the failure notification message set up a backup communication path in parallel, comprising:
- selecting first communication nodes which receive the failure notification message sent by second communication nodes on a segment of an active communication path to be protected within a predetermined time which satisfies required recovery time; and
searching for a backup communication path that bypasses the failures on the segment, whose starting node, intermediate node and ending node are selected among the first communication nodes.
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Abstract
A communication node selecting unit selects a communication node where a time for transferring a failure notification message from a plurality of failure detected communication nodes which detect a plurality of failures on an active communication path to be protected is within a predetermined time, and a backup communication path designing unit searches, based on the selected communication nodes, for a common backup communication path which bypasses the failures.
180 Citations
21 Claims
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1. A backup communication path design method in which backup communication path information is previously registered in each communication node of a communication network having a plurality of communication nodes, when a communication link failure or communication node failure occurs, a failure-detected communication node transmits a failure notification message containing failure portion information to the each communication node and a communication node which has received the failure notification message set up a backup communication path in parallel, comprising:
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selecting first communication nodes which receive the failure notification message sent by second communication nodes on a segment of an active communication path to be protected within a predetermined time which satisfies required recovery time; and searching for a backup communication path that bypasses the failures on the segment, whose starting node, intermediate node and ending node are selected among the first communication nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A backup communication path design method for a communication network having a plurality of communication nodes, wherein backup communication path information is in advance registered in each communication node of the communication network, and when a communication link failure or communication node failure occurs, a failure-detected communication node transmits a failure notification message containing failure portion information to each communication node and a communication node which has received the failure notification message set up a backup communication path in parallel, comprising:
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selecting first communication nodes on an active communication path which receives the failure notification message sent by all second communication nodes on a segment of the active communication path to be protected within a predetermined time which satisfies required recovery time; and searching, for a backup communication path that bypasses the failures on the segment, whose starting node is selected among the first communication nodes.
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17. A backup communication path design apparatus in which backup communication path information is previously registered in each communication node of a communication network having a plurality of communication nodes, when a communication link failure or communication node failure occurs, a communication node transmits a failure notification message containing failure portion information to the each communication node and a communication node which has received the failure notification message set up a backup communication path in parallel, comprising:
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a selecting unit that selects first communication nodes which receive the failure notification message sent by second communication nodes on a segment of an active communication path to be protected within a predetermined time which satisfies required recovery time; and a searching unit that searches for a backup communication path that bypasses the failures on the segment, whose starting node, intermediate node and ending node are selected among the first communication nodes. - View Dependent Claims (18, 19, 20)
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21. A non-transitory computer readable recording medium having recorded thereon a computer program for realizing on a computer a backup communication path design method in which backup communication path information is previously registered in each communication node of a communication network having a plurality of communication nodes, when a communication link failure or communication node failure occurs, a failure-detected communication node transmits a failure notification message containing failure portion information to the each communication node and a communication node which has received the failure notification message set up a backup communication path in parallel, the computer program executing steps of:
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selecting first communication nodes which receive the failure notification message sent by second communication nodes on a segment of an active communication path to be protected within a predetermined time which satisfies required recovery time; and searching for a backup communication path that bypasses the failures on the segment, whose starting node, intermediate node and ending node are selected among the first communication nodes.
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Specification