Contention Resolution in Optical Burst Switched Networks

Abstract

In our day to day life high speed data transfer network is becoming ubiquitous. To meet this demand optical networks are the best solution. In optical networks, Optical Burst Switched(OBS) networks provides the best feasible solution to meet the most advantages of all optical networks. To perform the OBS network a lot of challenges are faced that have to be solved, contention is one of them.The network contention is a limitation in realization of optical burst switched networks. Many approaches were evolved for its resolution. Adaptive network contention resolution has drawn the attention of many researchers as it o ers high data burst utilization and reduces the burst drop rate of the network. Contention can be measured by the burst drop rate in the network. In this thesis work, we developed a solution to solve the problem of contention in OBS network using adaptive contention resolution approach. In this technique, data burst size is changed adaptively according to the burst drop rate in the network. That leads to contention resolution in the network. Extensive simulations are carried out for measuring the reduction in burst contention and increase in throughput. The result obtained through simulation on NS-2 platform shows that burst drop rate is being reduced from 0.014% to 0.009% and increases in throughput of the network as the number of packets received successfully, increases from 1100083 to 1462713.