Publication Type:

Conference Paper


2012 International Conference on Optical Engineering, ICOE 2012, Belgaum, Karnataka (2012)





alternate methodology, Blocking probability, Conflict information, Control signal, Destination nodes, Distance information, Distributed management schemes, Fiber optic networks, Light path, Network performance, Optimization, OR-networks, Source nodes, survivability, Wavelength division multiplexing, WDM networks


Existing methodologies in WDM networks, generally uses either lightpath distance or network congestion to identify optimal and backup lightpaths. In our paper, we have designed an efficient alternate RWA protocol (EARP) which considers both congestion and route distance so as to improve the network performance. On arrival of a request the source node sends control signals through all the paths to the destination node. In this process, the number of free continuous wavelengths and conflict information are collected at the destination. Then, the lightpaths are computed based on this information and the precomputed distance information. A subset of wavelengths in the optimal lightpath is considered at the destination node for the reservation on the basis of conflict information. Backup lightpath is used for survivability. The selection of backup lightpath is done in such a way that there is no shared link between the primary and backup lightpath but it can be shared with another backup lightpath. By simulation results, we showed that our proposed protocol has lower blocking probability than the existing.


cited By (since 1996)0; Conference of org.apache.xalan.xsltc.dom.DOMAdapter@5283092e ; Conference Date: org.apache.xalan.xsltc.dom.DOMAdapter@18cfd554 Through org.apache.xalan.xsltc.dom.DOMAdapter@74be8a85; Conference Code:95583

Cite this Research Publication

R. Janani, Kiran, S. P., Swapna, T., Dr. T. K. Ramesh, and Vaya, P. R., “Efficient alternate RWA protocol for WDM networks”, in 2012 International Conference on Optical Engineering, ICOE 2012, Belgaum, Karnataka, 2012.