IP/WDM网络中基于光通路物理跳距评估的业务梳理

Traffic grooming based on estimates of the physical lightpath hops in overlay IP/WDM networks

为解决层叠IP/WDM(wavelength divisionmultiplexing)网络中标签交换路径(label switched path,LSP)梳理效率低下问题,提出了一种基于"可能邻居"概念的光通路物理跳距评估方法。该方法通过使用节点对的单跳梳理概率信息评估光通路占用的波长资源量,优先选择可能的短距光通路承载LSP连接。仿真结果表明,该方法能有效地评估光通路的物理跳距,减少LSP连接平均占用的光层资源,显著降低请求阻塞率,提高网络资源利用效率。

Lightpath utilization inefficiencies exist when grooming label switched path （LSP） requests in IP over wavelength-division multiplexing （WDM） networks with an overlay model. A possible-neighbor-based strategy was developed to estimate the physical hops of lightpaths using the single-hop grooming probabilities of router pairs, to preferably select possible shorter lightpaths to carry connections. Simulations show that the strategy can effectively estimate the physical lightpath hops and reduce the average optical resource consumption of LSP connections to significantly improve the connection request blocking probability and network resource utilization.