中文摘要：

针对灵活栅格光网络中时变业务的路由和频谱分配问题,提出了面向流量均衡的最优最短路的路由和频谱分配算法。通过灵活的频谱扩展收缩策略指导频谱的分配,同时借助流量均衡的路由分配策略,使得网络中相邻的光通路在不同时刻共享部分频谱资源,以提高频谱的利用效率。

英文摘要：

In order to address the time varyingrouting and spectrum allocation problem in flexible grid optical networks, we propose the Best Fit Shortest Routes ＆ Load Balance RSA （BFSR-LB RSA） algorithm. The notion of BFSR-LB RSA algorithm is to enable the sharing of spectrum slots among spectrum-adjacent connections by modifying the spectrum allocated to each connection. At the meanwhile, best fit routing policy andtwo ordering policies are presented to balance the traffic load of the network.Simulation results reveal that the algorithms significantly improve the spectrum utilization and minimize the number of the used frequency slots in flexible grid optical networks.