Ring-mesh networks
First Claim
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1. A ring-mesh network with a bandwidth (BW) on all lines, for transporting a traffic signal between a source and a destination node, comprising:
- a bidirectional line switched ring network, having a ring working bandwidth of 50% BW and a ring protection bandwidth of 50% BW;
a mesh connection between a first and a second node of said ring network, having a mesh working bandwidth of 100% BW allocated to a mesh working traffic; and
wherein all lines have the same bandwidth, wherein the path of said traffic signal comprises one of a ring-only component, a hybrid component, and both a ring and a hybrid component, and wherein said hybrid component comprises a first ring component between said source node and said first node, a mesh component between said first node and said second node, and a second ring component between said second node and said destination node.
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Abstract
A ring-mesh network architecture is provided for increasing the working/protection bandwidth ratio (W/PBR) of transport networks. The ring-mesh network has mesh connections between some nodes, the traffic on the mesh connections being unprotected. This increases the W/PBR from the current 1:2 value to (n−2)/(n−1), where n is the number of nodes, (n−1) is the number of connections on each node and (n−2) is the number of working connections on each node for one direction of traffic. Ring-mesh networks with add/drop multiplexers in the mesh connection are also provided.
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Citations
26 Claims
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1. A ring-mesh network with a bandwidth (BW) on all lines, for transporting a traffic signal between a source and a destination node, comprising:
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a bidirectional line switched ring network, having a ring working bandwidth of 50% BW and a ring protection bandwidth of 50% BW;
a mesh connection between a first and a second node of said ring network, having a mesh working bandwidth of 100% BW allocated to a mesh working traffic; and
wherein all lines have the same bandwidth, wherein the path of said traffic signal comprises one of a ring-only component, a hybrid component, and both a ring and a hybrid component, and wherein said hybrid component comprises a first ring component between said source node and said first node, a mesh component between said first node and said second node, and a second ring component between said second node and said destination node. - View Dependent Claims (2, 3, 4)
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5. A method for creating a ring-mesh network with a bandwidth BW on all lines, comprising:
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connecting a plurality of traffic nodes in a bidirectional line switched ring network;
allocating to said ring network 50% of the BW for a ring working bandwidth and 50% of the BW to a ring protection bandwidth;
providing a mesh connection between a first and a second node of said ring network;
allocating 100% of the BW to a mesh working bandwidth; and
transporting a traffic signal between a source and a destination node of said ring mesh network, on a route including said mesh connection, said traffic signal using 50% of said mesh working bandwidth, wherein working/protection BW′
ratio for said traffic signal is higher than 0.5. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification