We focus on the collision avoidance problem in distributed optical burst switching (OBS) networks. Our proposal involves cooperation between the routing and the wavelength assignment tasks. The main idea is to classify each wavelength at an output link of a node as suited either to sending or to relaying data bursts. Furthermore, burst retransmission management is important to realize OBS networks. We propose the cooperation method considering retransmission. Simulation results show that the proposed method can reduce the burst loss probability, particularly for long-distance transmissions. As a result, unfairness in the treatment of short and long hop bursts can be alleviated.
© 2008 Optical Society of America
Original Manuscript: November 13, 2007
Revised Manuscript: February 20, 2008
Manuscript Accepted: March 4, 2008
Published: April 10, 2008
Yusuke Hirota, Hideki Tode, and Koso Murakami, "Retransmission management for RWA using the suitability index in OBS networks," J. Opt. Netw. 7, 410-425 (2008)