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首页> 外文会议>Photonics and optoelectronics meetings;Conference on fiber optic communication and sensors;POEM; 20081124-27;20081124-27;20081124-27; Wuhan(CN);Wuhan(CN);Wuhan(CN) >A Novel RWA Scheme based on Proactive Contention Avoidance Mechanism in Optical Networks
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A Novel RWA Scheme based on Proactive Contention Avoidance Mechanism in Optical Networks

机译：光网络中基于主动竞争避免机制的新型RWA方案

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摘要

This paper proposes a proactive contention avoidance mechanism through dedicated wavelength assignment method in the optical burst switching network. In our scheme, one or more dedicate wavelengths are assigned to each ingress node and each ingress node transmits incoming bursts to various destination with its dedicated wavelength. Therefore contention at intermediate core nodes can be avoided and contention is localized at each ingress node, in where this situation can be resolved by means of electric buffer. Furthermore, based on the status of traffic distribution, we propose a constructive scheme to construct a load-balanced spanning tree for each ingress node, where input loads are balanced appropriately among each output port of ingress node. And, identical wavelength can be shared with bursts transmitted to different destination nodes within the spanning tree. Thus our scheme has statistical multiplex gain and it expected to utilize wavelength effectively. Simulation result indicates the burst loss performance can be improved drastically without wavelength conversion comparing with those algorithms that completely shared wavelength link.
机译：本文提出了一种通过专用的波长分配方法在光突发交换网络中的主动竞争避免机制。在我们的方案中，将一个或多个专用波长分配给每个入口节点，并且每个入口节点使用其专用波长将入射的突发传输到各个目的地。因此，可以避免在中间核心节点上发生争用，并且争用位于每个入口节点上，在这种情况下，可以通过电缓冲器解决这种情况。此外，根据流量分配的状态，我们提出了一个建设性的方案，为每个入口节点构造一个负载均衡的生成树，其中输入负载在入口节点的每个输出端口之间得到适当的平衡。并且，相同的波长可以与传输到生成树内不同目标节点的突发共享。因此，我们的方案具有统计复用增益，并且有望有效利用波长。仿真结果表明，与那些完全共享波长链路的算法相比，无需进行波长转换就可以大大提高突发损失性能。

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