Abstract
Burst contention is the key issue to solve for optical burst switching (OBS), deflection routing is researched as an effective contention resolution approach. A pre-deflection Routing (CAPDR) algorithm based on Congestion Avoidance is proposed in the paper, using periodic feedback network congestion information, the algorithm deflects in advance parts of the bursts in some probability. Compared with the traditional shortest path deflection routing, the new algorithm can avoid congestion and also balance the load of the network. Simulation results show that the proposed algorithm outperforms shortest path deflection routing in terms of the burst loss ratio (BLR), throughput and average link utilization.
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