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Title: A new protection algorithm with consideration of lightpath load in fault-tolerant GMPLS optical networks
Authors: Guo, L
Cao, J 
Wang, X
Yu, C
Hou, W
Keywords: GMPLS
Heavy-load lightpath
Optical networks
Issue Date: 2010
Publisher: Urban & Fischer
Source: Optik, 2010, v. 121, no. 21, p. 1919-1924 How to cite?
Journal: Optik 
Abstract: In this paper, we study the survivability in GMPLS optical networks and propose a new algorithm called Protection based on Lightpath Load (PLL) to tolerate the single-fiber link failure. Based on the parameter, Boundary of Heavy-load Lightpath (BHL), PLL can effectively choose the protection execution whether on optical layer or on IP/MPLS layer, such that the bandwidth utilization and recovery complexity can be compromised. In PLL, if the number of Working Label Switching Path (WLSPs) carried on a Working Lightpath (WLP) exceeds the value of BHL, this WLP will be protected in optical layer; otherwise, these WLSPs carried on this WLP will be protected on IP/MPLS layer. Simulation results show that, compared to conventional protection algorithm, PLL not only can significantly reduce the recovery complexity but also can obtain satisfactory trade-off performance.
ISSN: 0030-4026
EISSN: 1618-1336
DOI: 10.1016/j.ijleo.2009.05.025
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