Ms. Dongying Jiao Profile

Dongying Jiao

at Beijing Univ of Posts & Telecommunications

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Proceedings Article | 19 November 2007 Paper

A novel disjoint path selection scheme with shared risk link groups in ASON

Dongying Jiao, Xianqing Wang, Yueming Lu, Yuefeng Ji

Proceedings Volume 6784, 67840P (2007) https://doi.org/10.1117/12.742481

KEYWORDS: Diode pumped solid state lasers, Computer simulations, Reliability, Networks, Optical networks, Neodymium, Lutetium, Optical communications, Telecommunications, Optical fibers

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For reasons of survivability, many methods have been introduced to Automatically Switched Optical Network (ASON), such as path protection. In path protection, the protection path is link-disjoint, node-disjoint or risk-disjoint with the working path, which can improve the survivability of network. The complete risk-disjoint routing algorithm (CRDRA) is the most popular algorithm in protection path selection at present, in which the links sharing same risk with those contained in the working path are pruned away from the available resources when calculating protection path. By using this algorithm, the survivability of network can be enhanced; but the number of connections which can be successfully routed over current network drops. In this paper, a novel disjoint path selection scheme (DPSS) based on shared risk link group (SRLG) is proposed. In this algorithm, the risk-sharing links are not removed, but to be partially pruned away according to their availability and the weight of remained risk-sharing links should be adjusted to a proper value. Selecting protection path with DPSS, the number of connections that can be successfully routed will increase; in the mean time we can achieve a relative good survivability. Routing simulations have been done over mesh networks to compare the suggested DPSS with link-disjoint routing algorithm (LDRA) and CRDRA. With the simulation results, a conclusion can be made on the performance of different algorithms.

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