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中文摘要：
光突发交换（OBS）是实现下一代光互联网技术中的一种极具前景的方案．OBS网络中采用的路由机制多是最短路径优先的路由选择机制，这种路由机制本身的缺陷会使网络有较大的阻塞概率，不能实时反映网络流量的变化，同时对不同的网络拓扑的适应性较差，本文提出了一种OBS网络中能实现负载平衡的路由机制，对一个请求选择一条可以使网络中各链路使用波长数的统计方差最小的路由，仿真结果表明，该方法在阻塞概率方面要优于最短路径路由机制；而在传输延迟性能方面接近于最短路径路由机制，同时对于不同的网络拓扑以及节点流量的变化都具有一定的适应性。
英文摘要：
Optical Burst Switching （OBS） is a promising paradigm for the next-generation Intemet. In OBS networks, the most straightforward approach to muting a connection is to always choose the same fixed route for a given source-destination pair. One example of such an approach is fixed shortest-path muting. This approach to muting connections is very simple; however, the disadvantage of such an approach is that, if resources （wavelengths） along the path are tied up, it can potentially lead to high blocking probabilities in the dynamic case,or may result in a large number of wavelengths being used in the static case. In this paper, a load-balancing routing mechanism in OBS networks is proposed, which chosa path that balances the assigned wavelengtks of every finks. Simulations show that, this method is better than shortest-path muting in block probability, and it is nearly as good as shortestpath routing in transmission delay. It can reflect the real-time change of the traffic flow, at the same time; it is good at adapting different topologies.
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