Adaptive Hybrid Deflection and Retransmission Routing for Optical Burst-Switched Networks

TL;DR

This paper introduces an adaptive hybrid routing method for optical burst-switched networks that dynamically combines deflection and retransmission to improve performance under varying network conditions.

Contribution

It proposes a novel adaptive hybrid approach that adjusts deflection and retransmission strategies based on real-time network metrics, outperforming static methods.

Findings

Reduces Burst Loss Ratio (BLR) significantly.

Improves network goodput.

Outperforms static routing approaches.

Abstract

Burst contention is a well known challenging problem in Optical Burst Switching (OBS) networks. Deflection routing is used to resolve contention. Burst retransmission is used to reduce the Burst Loss Ratio (BLR) by retransmitting dropped bursts. Previous works show that combining deflection and retransmission outperforms both pure deflection and pure retransmission approaches. This paper proposes a new Adaptive Hybrid Deflection and Retransmission (AHDR) approach that dynamically combines deflection and retransmission approaches based on network conditions such as BLR and link utilization. Network Simulator 2 (ns-2) is used to simulate the proposed approach on different network topologies. Simulation results show that the proposed approach outperforms static approaches in terms of BLR and goodput.