An efficient routing scheme to reduce packet loss in all optical networks

Abstract

Optical burst switching (OBS) is a promising technology for the next generation optical Internet. A buffer-less OBS network can be implemented using ordinary optical communication equipment without the need for either wavelength converters or optical memories. However, OBS networks suffer from a relatively high blocking probability, a primary metric of interest, because of contention. In this paper, an efficient deflection routing scheme for buffer-less OBS networks has been proposed in order to reduce blocking probability (Packet loss) caused by Offset Time (OT) and burst contention. Simulation results have shown that the proposed scheme reduces blocking probability effectively and also it maintains a reasonable end-to-end delay for each burst. Thus, it improves the overall network performance by reducing the burst blocking probability effectively.

Pre-Deflection Routing with Blocking Probability Estimation Scheme in Optical Burst Switch Networks

“…When the burst is deflected onto an alternate route the preference is given to shorter routes. A burst is considered blocked if it arrives at a given node where all output links are busy or while trying alternate trunks, the burst reaches the maximum allowable number of deflections [11,12].…”

Variable size burst routing technique for burst loss reduction in OBS networks

“…Coutelen et al [13] proposed new www.conference.thesai.org deflection routing strategies based on different alternative path computing methods with burst dropping anticipated features like least loaded node, with U-turn and load balancing . More recently, Garg et al in [14] proposed an efficient deflection routing scheme for buffer-less OBS networks to reduce blocking probability caused by offset time and burst contention.…”

A Novel Approach to reduce Packet Loss in OBS Networks

“…However, due to the bursty and unpredictable nature of traffic, this adaptive provisioning approach is not sufficient to control the congestion, and additional reactive controls may be necessary in the network. More recently, Garg et al in [14] proposed an efficient deflection routing scheme for buffer-less OBS networks to reduce blocking probability caused by offset time and burst contention. This deflection routing method demonstrated in [14] will be taken as 'the conventional' scheme in the context of this research.…”

“…More recently, Garg et al in [14] proposed an efficient deflection routing scheme for buffer-less OBS networks to reduce blocking probability caused by offset time and burst contention. This deflection routing method demonstrated in [14] will be taken as 'the conventional' scheme in the context of this research.…”