PATH PROTECTION BY SHARING CONTINUITY CHECK MESSAGES
First Claim
1. A method for managing protection of a plurality of defined paths in a communication system comprising:
- listing the defined paths, each item in the list comprising;
a defined path identifier;
a defined path ingress node;
a defined path egress node; and
a defined path protection period;
wherein some of the defined paths share an ingress node and an egress node;
managing a sending of Continuity Check Messages (CCMs) along at least some of the defined paths, such that a CCM is sent every protection period; and
for at least a plurality of the defined paths which share an ingress node and an egress node, managing a sharing of the protection of the plurality of the defined paths, the sharing comprising sending one set of CCMs, shared by the plurality of the defined paths, at a frequency based, at least in part, on a shortest one of the protection periods of the plurality of the defined paths.
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Accused Products
Abstract
A method for managing protection of a plurality of defined paths in a communication system including listing the defined paths, each item in the list including a defined path identifier, a defined path ingress node, a defined path egress node, and a defined path protection period, wherein some of the defined paths share an ingress node and an egress node, managing a sending of Continuity Check Messages (CCMs) along at least some of the defined paths, such that a CCM is sent every protection period, and for at least a plurality of the defined paths which share an ingress node and an egress node, managing a sharing of the protection of the plurality of the defined paths, the sharing including sending one set of CCMs, shared by the plurality of the defined paths, at a frequency based, at least in part, on a shortest one of the protection periods of the plurality of the defined paths. A method for protecting a plurality of paths which share at least one leg in a communication network, including sharing, between the paths, Continuity Check Messages (CCMs) for at least the shared leg. Related apparatus and methods are also described.
22 Citations
21 Claims
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1. A method for managing protection of a plurality of defined paths in a communication system comprising:
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listing the defined paths, each item in the list comprising; a defined path identifier; a defined path ingress node; a defined path egress node; and a defined path protection period; wherein some of the defined paths share an ingress node and an egress node; managing a sending of Continuity Check Messages (CCMs) along at least some of the defined paths, such that a CCM is sent every protection period; and for at least a plurality of the defined paths which share an ingress node and an egress node, managing a sharing of the protection of the plurality of the defined paths, the sharing comprising sending one set of CCMs, shared by the plurality of the defined paths, at a frequency based, at least in part, on a shortest one of the protection periods of the plurality of the defined paths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14, 16, 18, 20)
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- 8. A method for protecting a plurality of paths which share at least one leg in a communication network, comprising sharing, between the paths, Continuity Check Messages (CCMs) for at least the shared leg.
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13. A node in a communication network with protected paths, comprising a Continuity Check Message sharing unit.
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15. A Continuity Check Message sharing unit for managing Continuity Check Message sharing for more than one communication node in a communication network.
Specification