WDM网中一种考虑优先级的多播共享段保护

A multicast segment shared protection with load balance and priority in WDM mesh networks

研究网状波分复用(WDM)光网络中动态多播业务的保护方案,提出一种共享保护(LRP-MSSP)算法。该算法根据网络状态和优先级的不同调整链路代价,为每个多播业务请求建立最小代价工作树,并为光树上互不重叠的工作段提供链路分离的保护段,在网络失效时,进行业务段保护切换。仿真表明,该算法能使业务更均衡,资源利用率更高,且满足不同优先级业务的需要。

The protection scheme for dynamic multicast traffic in wavelength division multiplexing（WDM） networks was studied.We proposed a shared protection algorithm called LRP-MSSP,which modulates the link cost according to the network status and different priorities,establishs a minimum cost light-tree for each multicast connection request,and find a link-disjoint back up segment for each work segment on the light-tree. If a fiber link fails,reprovision a new capacity for the vulnerable segments.The simulations show that LRP-MSSP can not only make the connection more balance, less resource utilization,can also adapt with the needs of connection with different priorities.