Performance Analysis of Proactive, Reactive and Hybrid Loss Recovery Mechanisms in Star OBS Networks
نویسندگان
چکیده
In OBS networks, lost bursts can be recovered proactively by using burst cloning, or reactively, by using burst retransmission. Burst cloning has advantage of low burst delay but it suffers from low bandwidth utilization. Burst retransmission has advantage of high bandwidth utilization but at the cost of high burst delay. To overcome this problem in star OBS networks, we propose two solutions. The first is an enhanced burst retransmission scheme, which aims to control the retransmissions through a simple technique to enable/disable burst retransmission. The second is a new hybrid loss recovery scheme, which aims to integrate efficiently burst cloning and burst retransmission. We develop analytical models for proposed mechanisms. Our analytical models achieve a good approximation in comparison with the simulation results and both analytical and simulation results demonstrate that hybrid loss recovery mechanism can offer better overall network performance compared with other mechanisms.
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