FEC-based burst loss recovery for multiple-bursts transmission in optical burst switching networks

Currently, grid computing and CD/DVD delivery are considered as applications in OBS networks. For these applications, multiple bursts are required to be transmitted simultaneously to any node in contrast with the conventional burst transmission. Moreover, the reliable transmission has to be provided for the multiple bursts. In this paper, we propose a consecutive burst transmission with burst loss recovery based on forward error correction (FEC) for the multiple-bursts transmission. In the proposed method, redundant data is generated from multiple bursts with FEC, and a redundant burst is assembled with the redundant data. Then, the multiple bursts and the redundant burst are transmitted consecutively. If a burst among the bursts is lost at some intermediate node, the lost burst is recovered with the redundant burst at the destination. We evaluate by simulation the proposed method in a uni-directional ring network and compare the performance of the proposed method with the extra-offset time scheme. Numerical examples show that the proposed method can provide a more reliable transmission than the extra-offset time scheme for the OBS network where the burst size and the maximum number of hops are large