光因特网中动态综合考虑的资源分配算法

INTEGRATED DYNAMIC RESOURCE ALLOCATION IN IP OVER WDM NETWORKS

该文研究了光因特网络中的动态资源分配问题。提出了基于分层图模型的路由选择和波长分配算法。对于动态变化的业务到达请求,如果在已有的基于IP级的逻辑拓扑上不能有效建立,则需要为该请求按算法分配资源,即解决路由选择和波长分配问题。由于该文算法将IP层和光层综合进行考虑,所以能大大提高资源利用的有效性,取得较好的阻塞性能。仿真结果表明,该算法既能选择比较短的路由,又能使网络取得较低的阻塞率。

For resource allocation in IP over WDM networks, this paper proposes a novel routing and wavelength assignment algorithm based on layered-graph. The algorithm will open new wavelength paths if the arriving requests cannot be set-up over the existing IP-level topology effectively. As the developed integrated dynamic resource allocation policy combines the characteristics of the IP layer and optical layer, the algorithm naturally has a better network usage than those traditional ways taking into account the two layers separately. Simulation results show that the developed scheme performs very well in terms of performance metrics such as the hops of the lightpaths and the network blocking probability.