Throughput Based Comparison of Different Variants of TCP in Optical Burst Switching (OBS) Network

Optical Burst Switching (OBS) is a promising switching paradigm for all-optical WDM networks. It combines advantages of both Optical circuit switching (OCS) and Optical packet switching (OPS) and avoids the disadvantages. In this paper, we present a dumb-bell topology as our simulation network. We are using three different variants of TCP that are TCP-Tahoe, TCP-Reno and TCPNew Reno. This study represents results of throughput from an experimental study of TCP source variants, Tahoe, Reno and New Reno. We measure the throughput of each variant by considering the network parameters such as, bandwidth, packet size, congestion window size and queue-limit. Here we construct a standard dumb-bell topology. The dumb-bell topology is used to study the effect of a bottle-neck link shared by many sources. All simulations performed using NS-2 network simulator. After getting the trace for each scenario we analyzed the behavior of three TCP variants and results show that New Reno gives better throughput for wired OBS network in predefined simulation criteria.