Guo Hong, Dai Hua, Wang Chao, Li Yongcheng, Bose Sanjay K, Shen Gangxiang
Opt Express. 2015 Jul 27;23(15):20158-75. doi: 10.1364/OE.23.020158.
We apply an adaptive forward error correction (FEC) allocation strategy to an Elastic Optical Network (EON) operated with shared backup path protection (SBPP). To maximize the protected network capacity that can be carried, an Integer Linear Programing (ILP) model and a spectrum window plane (SWP)-based heuristic algorithm are developed. Simulation results show that the FEC coding overhead required by the adaptive FEC scheme is significantly lower than that needed by a fixed FEC allocation strategy resulting in higher network capacity for the adaptive strategy. The adaptive FEC allocation strategy can also significantly outperform the fixed FEC allocation strategy both in terms of the spare capacity redundancy and the average FEC coding overhead needed per optical channel. The proposed heuristic algorithm is efficient and not only performs closer to the ILP model but also does much better than the shortest-path algorithm.
我们将自适应前向纠错（FEC）分配策略应用于采用共享备份路径保护（SBPP）运行的弹性光网络（EON）。为了最大化可承载的受保护网络容量，开发了一个整数线性规划（ILP）模型和一种基于频谱窗口平面（SWP）的启发式算法。仿真结果表明，自适应FEC方案所需的FEC编码开销显著低于固定FEC分配策略所需的开销，从而使自适应策略具有更高的网络容量。在备用容量冗余和每个光通道所需的平均FEC编码开销方面，自适应FEC分配策略也能显著优于固定FEC分配策略。所提出的启发式算法效率高，不仅性能更接近ILP模型，而且比最短路径算法表现要好得多。
