Second Phase Reconfiguration of Restored Path for Removal of Loop Back in P-Cycle Protection

Asthana, Rachna; Singh, Yatindra Nath

doi:10.1109/lcomm.2007.061635

Cited by 17 publications

(6 citation statements)

References 8 publications

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“…This mechanism can be classified into path restoration and link restoration [7]. Path restoration is more efficient than link restoration in terms of spare capacity utilization where as link restoration is faster than path restoration [8]. Shared Backup Path Protection (SBPP) is similar to the 1 + 1 APS scheme in it two disjoint paths, a working and backup path are routed to transmit the optical signal.…”

Section: Background and Related Workmentioning

confidence: 99%

Optimal & Computationally Efficient Resilient Technique (OCERT) for Optical WDM Networks

Garg¹

2017

IJFGCN

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Section: Background and Related Workmentioning

confidence: 99%

Optimal & Computationally Efficient Resilient Technique (OCERT) for Optical WDM Networks

Garg¹

2017

IJFGCN

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“…In the next section we explain the issue and in section III the technique to remove the loop back is given [25]. Section IV discusses the simulations and results and finally conclusions are given in section V.…”

Section: Introductionmentioning

confidence: 99%

Removal of Loop Back in p-cycle Protection: Second Phase Reconfiguration

Asthana

Singh

2006

2006 10th IEEE Singapore International Conference on Communication Systems

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P-cycles are one of the most promising techniques of span protection used in optical networks. However the protection path provided by p-cycle may contain some nodes, which are part of the working path also. When the p-cycle is used to provide protection to any failed span of the working path, then due to the common nodes in working path and protection path provided by p-cycle, there will be overlapping of these nodes in the restored path. These overlapping nodes will appear twice in the restored path, once in the working path and then in the protection path provided by p-cycle for the protection of any failed span. This repetition will make loops at the overlapping nodes. Hence redundant span capacity will be used. To remove these loops, and release the redundant capacity a scheme is developed to reconfigure the restored path. This aspect of the p-cycle has not been discussed so far in the literature. The released capacity is calculated and it has been found that significant amount of capacity is released. The average amount of released capacity with second phase reconfiguration, is in the range of 26% to 28% for the test network, depending upon the traffic distribution.

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“…This problem can be solved using the algorithm given in [17], which removes the loop backs and release the redundant capacity by reconfiguring the restored paths.…”

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confidence: 99%

Two-link failure protection in WDM mesh networks with p-cycles

et al. 2010

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In WDM networks, it is important to protect connections against link failures due to the high bandwidth provided by a fiber link. Although many p-cycle based schemes have been proposed for single-link failure protection, protection against two-link failures have not received much attention. In this paper, we propose p-cycle based protection schemes for two-link failures. We formulate an ILP model for the pcycle design problem for static traffic. We also propose two protection schemes for dynamic traffic, namely SPPP (Shortest Path Pair Protection) and SFPP (Short Full Path Protection). Simulation results show that SFPP is more capacity efficient than SPPP under incremental traffic. Under dynamic traffic, SPPP has lower blocking than SFPP when the traffic load is low and has higher blocking than SFPP when the traffic load is high.

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Second Phase Reconfiguration of Restored Path for Removal of Loop Back in P-Cycle Protection

Cited by 17 publications

References 8 publications

Optimal & Computationally Efficient Resilient Technique (OCERT) for Optical WDM Networks

Optimal & Computationally Efficient Resilient Technique (OCERT) for Optical WDM Networks

Removal of Loop Back in p-cycle Protection: Second Phase Reconfiguration

Two-link failure protection in WDM mesh networks with p-cycles

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