Performance of distributed control protocol for WR-OBS systems

In the optical burst-switching (OBS) system, IP-over-WDM network has been paid great attention due to its bandwidth efficiency and adaptive traffic load accommodation. However, the abrupt burst for large traffic loads will result in unbearable performance degradation in the traditional JET network. To combat with the load sensitivity, a wavelength-routed OBS (WR-OBS) network architecture was confirmed effective. We have proposed a distributed control WR-OBS network architecture combining JET protocol with a two-way reservation method. Based on this architecture, two new resource reservation protocols are compared by evaluating performance. Computer simulation results demonstrate that improvement of burst blocking probability can be achieved in backward reservation protocol and all these two control protocols outperform traditional JET OBS network.