Protection of a priority connection from an optical switch failure in mesh networks with planar topologies

Ellinas, Georgios; Hailemariam, A.; Stern, Thomas

doi:10.1109/ofc.1999.767829

Cited by 3 publications

(4 citation statements)

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“…For purposes of APS, only the protection fibers are represented in the digraph. 2 In SONET rings, maximum detection and switching time is 50 ms.…”

Section: General Methodologymentioning

confidence: 99%

“…If every connection in the network is unidirectional, then the maximum number of link failure recoveries possible is (2) Clearly, the best scenario occurs when all the inner faces have a common adjacent face, namely the outer face. unidirectional connections can then be simultaneously restored if the failures occur at the edges that are common to both the inner and outer faces.…”

Section: A Bounds For Planar Topologiesmentioning

confidence: 99%

“…The reader should note that switch failures are not discussed in this paper as they constitute a different problem with its own set of solutions. A summary of the approach taken when a switch fails can be found in [2] and [3]. For a more extensive analysis, the reader should turn to [4].…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the time it takes to detect the failure and switch to the protection fiber is on the order of milliseconds. 2 Within this time frame, the network can recover from a cable failure without interrupting the services transported over the network, e.g., telephone calls, data transfers, etc. [6].…”

Section: Introductionmentioning

confidence: 99%

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Protection cycles in mesh WDM networks

Ellinas¹,

Hailemariam²,

Stern

2000

IEEE J. Select. Areas Commun.

Self Cite

144

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Abstract-A fault recovery system that is fast and reliable is essential to today's networks, as it can be used to minimize the impact of the fault on the operation of the network and the services it provides. This paper proposes a methodology for performing automatic protection switching (APS) in optical networks with arbitrary mesh topologies in order to protect the network from fiber link failures. All fiber links interconnecting the optical switches are assumed to be bidirectional. In the scenario considered, the layout of the protection fibers and the setup of the protection switches is implemented in nonreal time, during the setup of the network. When a fiber link fails, the connections that use that link are automatically restored and their signals are routed to their original destination using the protection fibers and protection switches. The protection process proposed is fast, distributed, and autonomous. It restores the network in real time, without relying on a central manager or a centralized database. It is also independent of the topology and the connection state of the network at the time of the failure.

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“…For purposes of APS, only the protection fibers are represented in the digraph. 2 In SONET rings, maximum detection and switching time is 50 ms.…”

Section: General Methodologymentioning

confidence: 99%

Section: A Bounds For Planar Topologiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations