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US 9,160,446 B2Granted
Method for supporting SNCP over packet network
AssigneeOrckit-Corrigent Ltd.
InventorsDaniel Cohn, Rafi Ram
Life of this patent
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Abstract
A method is presented for supporting SNCP over a packet network connecting to two SDH sub-networks and transporting one or more SDH paths that are SNCP-protected in both SDH sub-networks. The packet network connects to each of two sub-network interconnection points by a working path and a protection path. The packet sub-network may provide the same type of path protection as an SDH sub-network using SNCP, while avoiding bandwidth duplication.
Claims6
A switched network comprising:
- a packet switched sub-network configured to provide pseudo wire transport;
- a first sub-network connected to the packet switched sub-network, the first sub-network comprising:
- a first node;
- and
- a second node;
- and
- a second sub-network connected to the packet switched sub-network, the second sub-network comprising:
- a third node,
- a first pseudo wire, wherein the first node terminates the first pseudo wire and the third node terminates the first pseudo wire;
- a second pseudo wire, wherein the second node terminates the second pseudo wire and the third node terminates the second pseudo wire;
- and
- a third pseudo wire, wherein the first node and the second node may communicate through the packet switched sub-network via the third pseudo wire,
- wherein a first sub-network protocol and a second sub-network protocol are selected from a group consisting of Synchronous Digital Hierarchy (SDH) and synchronous optical network (SONET), and
- wherein the first sub-network and the second sub-network provide path protection services across the packet switched network, the path protection services selected from a group consisting of Sub-network Connection Protocol (SNCP) and Unidirectional Path Switched Ring (UPSR),
- wherein the network is configured to carry data plane traffic between the first sub-network and the second sub-network over the packet-switched sub-network by only one pseudo wire between the first sub-network and the second sub-network at any time, and
- wherein the first sub-network is configured to provide connectivity to the second sub-network after failure of the first node or the second node.
13 more elements
A switched network comprising:
- a packet switched sub-network configured to provide pseudo wire transport;
- a first sub-network comprising:
- a first node directly connected via pseudo wire to the packet switched sub-network;
- and
- a second node directly connected via pseudo wire to the packet switched sub-network;
- and
- a second sub-network comprising a third node directly connected via pseudo wire to the packet switched sub-network,
- wherein the pseudo wires comprise:
- a first pseudo wire, wherein the first node terminates the first pseudo wire and the third node terminates the first pseudo wire;
- a second pseudo wire, wherein the second node terminates the second pseudo wire and the third node terminates the second pseudo wire;
- and
- a third pseudo wire, wherein the first node and the second node may communicate through the packet switched sub-network via the third pseudo wire,
- wherein a first sub-network protocol and a second sub-network protocol are selected from a group consisting of Synchronous Digital Hierarchy (SDH) and synchronous optical network (SONET),
- wherein the first sub-network is configured to provide path protection services selected from a group consisting of Sub-network Connection Protocol (SNCP) and Unidirectional Path Switched Ring (UPSR),
- wherein the network is configured to carry data plane traffic between the first sub-network and the second sub-network over the packet-switched sub network only one of the group consisting of the first pseudo wire between the first sub-network and the second sub-network, and the second pseudo wire between the first sub-network and the second sub-network at any time, and
- wherein the first sub-network is configured to provide connectivity to the second sub-network after failure of the first node or the second node.
13 more elements
Dependencies are inferred from the claim text.