WDM光网络中基于传输损伤的公平RWA算法

在WDM光网络中，物理层上存在使信号传输质量恶化的因素，当信号质量劣化到一定程度会导致连接失败，因此有必要在选路和波长分配RWA（Routing and Wavelength Assignment）算法中考虑物理层的传输损伤。连接公平性问题是指网络中长路径连接请求的阻塞率表现比短路径差，文中分析传输损伤约束的引入对连接公平性的影响，提出基于传输损伤的动态RWA算法：固定波长配额FWQ（Fixed Wavelength Quota）算法和非固定波长配额UFWQ（UnFixed Wavelength Quota）算法。

Fair RWA Algorithms Based on Transmission Impairments for WDM Optical Networks

In WDM optical networks, some factors directly degrade the signal quality when signals are transmitted in the physical layer, and connection requests would be failed when the degradation is too severe, so transmission impairments should be considered in the process of RWA（Routing and Wavelength Assignment） algorithm. Connection fairness problem means that the blocking performance of long paths is worse than that of short paths. In this paper, the connection fairness performance affected by transmission impairments constraint is analyzed, and dynamic RWAalgorithms based on transmission impairments are presented： fixed wavelength quota algorithm and unfixed wavelength quota algorithm.