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Adaptive Wavelength Assignment Scheme for Distributed Path Restoration in Optical Networks

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4 Author(s)
Yining Cao ; Dept. of Electron. Eng., Tsinghua Univ. Beijing, Beijing, China ; Yanhe Li ; Xiaoping Zheng ; Hanyi Zhang

In wavelength-routed optical networks, routing and wavelength assignment (RWA) can be implemented in a dynamic and distributed way. During the distributed restoration process after a failure occurs, the concurrent reservation attempts from different original nodes may lead to collisions because they select the same wavelength with a large possibility, resulting in high recovery blocking probabilities. This paper presents a contention avoidance mechanism to improve restoration performance. With the adaptive wavelength assignment method, reservation contentions between adjacent nodes are reduced significantly and higher recovery ratio is achieved.

Published in:

Circuits, Communications and Systems, 2009. PACCS '09. Pacific-Asia Conference on

Date of Conference:

16-17 May 2009