Novel Closed-Loop Flow Controls Based on Virtual Path Concept in OBS Networks

Optical Burst Switching (OBS) has been proposed to realize the next generation Internet on the Wavelength Division Multiplexing (WDM) network technology. Optical Burst Switching is an ultra high speed switching technology for optical fiber networks but has the data burst contention problem. In this paper, we introduce Virtual Path (VP) concept addressing burst contention resolutions in OBS networks. We propose two novel flow control schemes, named Static Inter Arrival Time Flow Control (S-IAT) and Dynamic Inter Arrival Time Flow Control (D-IAT). S-IAT keeps the data burst contention rat e in an acceptable level on OBS networks. Based on S-IAT, D-IAT achieves almost the same data burst contention rate and higher throughput than S-IAT by using the data burst loss rate threshold. We will show the availability of proposed schemes by computer simulations.