Patent
Optical communication network and protection methods
TLDR
In this article, a plurality of optical switch nodes interconnected by optical transmission fibers, or other waveguides, are configured in optical networks including multiple diverse, working routes are provided on a single fiber path interconnecting switch nodes.Abstract:
Optical systems of the present invention are configured in optical networks including a plurality of optical switch nodes interconnected by a plurality of optical transmission fibers, or other waveguides. The transmission fibers in the network can provide working and/or protection capacity for information, or communications traffic, being transmitted through the network. In various embodiments of the network, multiple diverse, working routes are provided on a single fiber path interconnecting a plurality of switch nodes. The multiple, diverse working routes can then be protected using a common protection fiber or path to provide shared protection. The switch nodes include optical switch configured to provide various levels of optical switching depending upon the network configuration. For example, line switches as well as optical cross-connects and routers can be deployed in the present invention to switch one or more wavelengths between the working and protection fibers. The optical systems can be further configured to carry lower priority traffic on the protection fibers or wavelengths during normal operation to increase the overall normal operating capacity of the system.read more
Citations
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Patent
Data network having enhanced availability of extra traffic
TL;DR: In this paper, a ring switch operation is used to switch the working traffic to a respective protection path in the event of a fault in a working path, but at least some of it is protected by switching it to an alternative path.
Patent
Apparatus and method for optical communication protection
Evert E. Deboer,Darryl C. Ryan +1 more
TL;DR: In this article, the authors propose a path protection technique in which working and protection paths that are desired are assigned during network setup, in which only the working path is configured within the network elements' switch fabric with protection paths being left unconfigured.
Patent
Shared mesh signaling method and apparatus
TL;DR: In this article, a network element for providing protection switching in a 1:N shared mesh protection scheme having a first protection path associated with a pair of working paths selected from the N working paths is disclosed.
Patent
Mesh network protection using dynamic ring
TL;DR: In this article, the authors propose a method and apparatus for redirecting data communications traffic in a mesh network via an alternate path, which makes use of BLSR principles in addition to a dynamically invoked flexible ring formation mechanism.
Patent
Method and apparatus for computing a path through specified elements in a network
TL;DR: In this paper, a method for computing a circuit path between a source node and a destination node of a network includes identifying at least a first element that is to be traversed by the circuit path such that the path passes from the source node, traverses the first element, then passes to the destination node.
References
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Patent
Method and apparatus for operation, protection, and restoration of heterogeneous optical communication networks
Rohit Sharma,Larry R. Mcadams +1 more
TL;DR: In this article, a ring-switched signals propagate around the ring on protection fibers without encountering the terminal equipment at the intervening nodes, to the extent that the protection fiber links between any given pair of nodes are incapable of supporting all the relevant communication regimes, such links are modified to provide such support.
Patent
All fiber wavelength selective optical switch
TL;DR: An all fiber wavelength selective optical switch has one or more 1xN input optical couplers (20, 120), each having an input signal with a plurality of wavelengths (μ1, μ2, μ3) as mentioned in this paper.
Patent
Optical communication system
TL;DR: In this article, a discontinuous ring is formed by separate bidirectional optical communication links, with possibly different transmission speeds, synchronous or asynchronous transmission, and ratios of working to protection channels.
Patent
Ring/mesh optical network
John A. Fee,Sridhar Nathan +1 more
TL;DR: In this article, a plurality of optical cross-connect switches are freely interconnected to form a mesh type network, and at least three of the switches are switched to create a line-switched ring network, thereby forming a ring/mesh network.
Patent
Telecommunications network including a channel switching protection arrangement
TL;DR: In this article, an SDH (Synchronous Digital Hierarchical Hierarchy) telecommunications network is disclosed which comprises a plurality of interconnected nodes (1, 2, 3, 4, 5, 6) with one common protection channel (5) serving a plurality working channels (5, 6), such that in the event of a fault on a working channel traffic signals passing from a first node (3) to a second node (4) along that working channel along with the traffic signals which serves to identify the respective channel are switched onto the protection channel.
Related Papers (5)
Method and apparatus for operation, protection, and restoration of heterogeneous optical communication networks
Rohit Sharma,Larry R. Mcadams +1 more