A Priority Based Optical Header Contention Resolution in Optical Burst Switching Networks

Abstract

OBS is a promising switching paradigm for the next-generation Internet.In OBS, data packets are assembled into variable size data burst which are transmitted optically over Dense Wavelength Division Multiplexing(DWDM)networks without O/E/O conversion. The control packet is sent before the data burst to reserve resources and configure switches along the path .The control packet is sent along the separate control channel and goes through O/E/O conversion. We have discussed various OBS signalling protocols and
Burst Scheduling Algorithms. As the data channel bandwidth will grow it will lead to the overloading of the control path.
In this thesis we have proposed an algorithm to resolve the contention of the optical header. The algorithm assigns the priority to each control packet arriving at the same time .The control packet with highest priority is selected
for processing. Simulation results have shown that the technique is effective in improving the throughput.