WDM网络中基于分层图模型的ICBR路由算法

考虑到物理损伤导致光信号质量下降的严重性,提出了一种新的损伤感知路由和波长分配算法。该算法同时考虑多种线性和非线性损伤,从光信噪比(OSNR,Optical Signal Noise Ratio)和Q因子两方面来评估光信号的整体质量,严格保证了业务的服务质量。最后将损伤感知路由算法(ICBR,Impairment Constraint Based Routing algorithm)和分层图模型相结合,与传统ICBR算法相比,避免了不必要的连接阻塞,显著改善了网络性能。

A Layered Graph Model-based ICBR Algorithm in WDM Network

In consideration of the severity of optical signal degradation caused by the physical impairments,a new impairment constraint-based routing and wavelength assignment algorithm is proposed.This algorithm considers both linear and nonlinear impairments,estimates the overall quality of the signal from both Q factor and OSNR,thus strictly ensuring the quality of service.Finally,this new algorithm combines the ICBR（Impairment Constraint-Based Routing） algorithms with the layered graph model,and compared with the conventional ICBR algorithms,could avoid unnecessary connection blocking and significantly improve network performance.