METHOD AND MESSAGE THEREFOR OF MONITORING THE SPARE CAPACITY OF A DRA NETWORK
First Claim
1. A method of mapping a topology of the spare capacity of a distributed restoration algorithm (DRA) provisioned telecommunications network having a plurality of nodes interconnected with working and spare links, comprising the steps of:
- a) outputting a message from each spare link of each of said nodes to the adjacent node to which said each spare link is connected;
b) identifying the port number of said each node from where said each spare link outputs said message and the port number of the adjacent node connected to said each spare link whereat said message is received;
c) storing as data the respective port numbers of all nodes that have connected thereto at least one spare link via which said message is either sent or received, the identifies of said all nodes and the spare links interconnecting said all nodes; and
d) generating from said stored data the topology of all spare links interconnecting the nodes of said network.
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Accused Products
Abstract
To obtain a topology of the available spare links in a telecommunications network provisioned with a distributed restoration algorithm, messages containing the appropriate identifications of the nodes and the ports of the nodes to which spare links are connected are exchanged continuously along the spare links of the network. When a failure is detected, the origin node can retrieve the various messages, and from data contained therein, to construct a topology of the available spare links of the network which can then be used for finding an alternate route for rerouting the traffic disrupted by the failure.
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Citations
10 Claims
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1. A method of mapping a topology of the spare capacity of a distributed restoration algorithm (DRA) provisioned telecommunications network having a plurality of nodes interconnected with working and spare links, comprising the steps of:
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a) outputting a message from each spare link of each of said nodes to the adjacent node to which said each spare link is connected;
b) identifying the port number of said each node from where said each spare link outputs said message and the port number of the adjacent node connected to said each spare link whereat said message is received;
c) storing as data the respective port numbers of all nodes that have connected thereto at least one spare link via which said message is either sent or received, the identifies of said all nodes and the spare links interconnecting said all nodes; and
d) generating from said stored data the topology of all spare links interconnecting the nodes of said network. - View Dependent Claims (2, 3, 4, 5)
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6. In a distributed restoration algorithm (DRA) provisioned telecommunications network having a plurality of nodes interconnected with working and spare links, a method of continuously monitoring the available spare capacity of said network, comprising the steps of:
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a) generating keep alive messages;
b) continuously exchanging said keep alive messages on the spare links of said network when a DRA event is not in progress; and
c) recording the various spare ports that transmitted and received said keep alive messages to determine the number of spare links available in said network. - View Dependent Claims (7, 8)
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9. In a distributed restoration algorithm (DRA) provisioned telecommunications network having a plurality of nodes interconnected with working and spare links, a message being transmitted between adjacent nodes of said network that are connected by at least one spare link for mapping the topology of the spare capacity of said network, comprising:
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a first field containing the identification number of the node that sent said message;
a second field containing the identification number of the port of said node whence said message is output; and
a third field having an identifier that is set to a specific value when said node is one of the custodial nodes that bracket a failed link;
wherein, when there is a failed link, said message is broadcast from one of the custodial nodes that bracket said failed link. - View Dependent Claims (10)
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Specification