Quality-of-service-based protection in MPLS control WDM mesh networks

Wushao Wen; Biswanath Mukherjee; S. J. Ben Yoo

doi:10.1117/12.445179

17 October 2001 Quality-of-service-based protection in MPLS control WDM mesh networks

Wushao Wen, Biswanath Mukherjee, S. J. Ben Yoo

Proceedings Volume 4585, Optical Networking; (2001) https://doi.org/10.1117/12.445179
Event: Asia-Pacific Optical and Wireless Communications Conference and Exhibit, 2001, Beijing, China

Abstract

Intelligent methods for automatic protection and restoration are critical in optical transport mesh networks. This paper discusses the problem of quality of service (QoS)-based protection in term of the protection-switching time and availability for end-to-end lightpaths in a WDM mesh network. We analyze the backup lightpath-sharing problem in such networks and study the correlation of the working lightpaths and its impact to the sharing of their backup lightpaths. We present a multi-protocol-label-switching (MPLS) control-based fully distributed algorithm to solve the protection problem. The proposed algorithm includes intelligent and fully automatic procedures to set up, take down, activate, restore, and manage backup lightpaths. It greatly reduces the required resources for protection by allowing the sharing of network resources by multiple backup lightpaths. At the same time, it guarantees, if possible, to satisfy the availability requirement even with resource sharing by taking the correlation of working lightpaths into consideration when deciding backup lightpaths. A simple analysis of the proposed algorithm in terms of computation, time, and message complexity indicates that the implementation of the algorithm is practical. The illustrative studies that compare the performance of 1:1, unlimited sharing, and QoS-based sharing backup algorithms indicates that QoS-based sharing achieves comparable performance as unlimited sharing, which is much better than the 1:1 backup scheme in terms of connection blocking probability, average number of connections in the network for a given offered load, and network-resource utilization.

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Wushao Wen, Biswanath Mukherjee, and S. J. Ben Yoo "Quality-of-service-based protection in MPLS control WDM mesh networks", Proc. SPIE 4585, Optical Networking, (17 October 2001); https://doi.org/10.1117/12.445179

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KEYWORDS

Wavelength division multiplexing

Failure analysis

Optical networks

Network architectures

Promethium

Switching

Wavelength division multiplexing networks

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