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Vol. 174, Issue 7, July 2014, pp. 179-186




Dynamic Restoration Schemes in WDM Mesh Networks with Traffic Grooming Capacity

1 Chengjian Cao, 2 Yanjie Xuan, 3 Li Du

1 Key Laboratory of Medical Image Computing of Ministry of Education, Northeastern University, Shenyang, 110819, China
2, 3 Northeastern University, P.O. Box 134 College of Information Science and Engineering Northeastern University Shenyang, 110819, China
3 Tel.: 024-83683048, fax: 024-83683048

3 E-mail: duli26@126.com


Received: 3 April 2014 /Accepted: 30 June 2014 /Published: 31 July 2014

Digital Sensors and Sensor Sysstems


Abstract: This paper addresses the dynamic recovery problem in the wavelength division multiplexing mesh networks with traffic grooming capacity. We propose two restoration schemes. They are connection dynamic restoration scheme and lightpath dynamic restoration scheme. We also propose two restoration protocols, connection restoration protocol for connection dynamic restoration scheme and lightpath restoration protocol for lightpath dynamic restoration scheme, and formulate a model of restoration switching times for the two restoration schemes. Numerical result shows that connection dynamic restoration scheme and lightpath dynamic restoration scheme can achieve a better tradeoff of resource utilization rate and restoration success rate than protection scheme. Traffic grooming technology helps to improve the restoration success rate as well as to reduce restoration switching time. Connection dynamic restoration scheme yields a better performance than that of lightpath dynamic restoration scheme in terms of restoration success rate and restoration switching time.


Keywords: WDM network, Traffic grooming, Survivability, Dynamic restoration, Restoration protocol.


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