电力波分复用网络中基于软管模型的生存性设计

生存性设计是规划电力通信波分复用(WDM)网络时必须考虑的问题。传统的方法根据各节点对的峰值速率来制定保护规划方案,也并未考虑光纤链路之间共享物理资源的情况,既不准确又浪费资源。为解决上述问题,提出了一种新的计算共享风险链路组的失效概率模型,并以此为基础,提出了基于软管不确定业务量模型和共享风险链路组的分级保护算法——HSP算法,并通过计算机仿真对该算法的性能进行了评估。结果表明,HSP显著提高了找到保护路径的可能性,从而降低了受损业务无法恢复的概率。失效概率模型和HSP算法还应用到了某省级电力波分复用核心网络的成效评估和规划设计中,作为评估该省电力骨干光传输网络建设成本和可靠性的依据。

Survivability in Electric Power Communication Wavelength-division Multiplexing Networks Under Hose Model

When planning electric power communication wavelength-division multiplexing (WDM) networks, the issue of survivability design has to be considered. To employ protection schemes, traditional approaches rely on peak rates between node pairs irrespective of the condition that fiber links may share physical resources with one another. This yields gross resource redundancy as well as little accuracy in network planning. This paper proposes a novel probability model to compute shared risk link groups (SRLG) failures and a differentiated protection algorithm HSP on the basis of the hose uncertain traffic model and SRLG, so as to reach a solution of the above issues. Computer simulation is conducted to evaluate the performance of HSP. The results show that HSP dramatically increases the possibility of finding protection paths, thus making the interrupted services more likely to recover. Both the probability model and the algorithm are applied in the performance evaluation and rolling planning of a provincial level electric power WDM core network, as evidence of making the evaluation of the network cost and reliability.