The efficient contention resolution method for Optical Burst Switched network

In most of the contention resolution methods for Optical Burst Switched (OBS) networks proposed in literature, the resolution algorithm is applied at the core node of the network. However, if it is applied at the ingress node rather than core node, the complexity in terms of cost of extra delay lines and overhead processing can be reduced considerably. This paper presents a comparative overview of contention resolution methods. A model is proposed based on varying the burst size at the burst generation stage. The results show that there is reduction in time delay and hence the contention is minimized. The comparison of proposed scheme with segment and drop policy of burst segmentation scheme shows that our scheme perform better under low load and extremely better under high load for contention resolution in the OBS network.