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在全光网络中 ,如何合理利用波长转换来降低光网络的阻塞率是一个非常关键的问题。研究了最新的波长转换体系结构和波长转换手段 ,提出一种全新的混合波长转换方法 ,在减少网络中波长转换器个数的同时 ,维持拥塞概率类似于全波长转换。提出了 5种不同的波长转换器使用策略 ,并利用数值模拟的方法 ,比较了这 5种不同的波长转换器使用策略 ,分析结果 ,得出了最小化光网络的阻塞概率的波长转换使用策略。结合混合波长转换和波长转换器使用策略 ,进一步提出了光网络中优化波长转换器配置的遗传算法 ,通过对 14个节点的美国自然科学基金网 (NSFNet)的数值模拟 ,结果表明它是十分有效的 ,在减少光网络中波长转换器数量 ,且不增加光网络波长数量的情况下 ,基本保持原有网络性能
In all-optical networks, how to use wavelength conversion reasonably to reduce the blocking rate of optical networks is a crucial issue. The latest wavelength conversion architecture and wavelength conversion method are studied. A new hybrid wavelength conversion method is proposed. While reducing the number of wavelength converters in the network, the probability of maintaining congestion is similar to that of full wavelength conversion. Five different wavelength converter usage strategies are proposed, and the use of these five different wavelength converters is compared using numerical simulation methods. The results show that the strategy of wavelength conversion for minimizing the blocking probability of optical networks . Combining with the hybrid wavelength conversion and the use of wavelength converter, the genetic algorithm to optimize the wavelength converter configuration in optical network is further proposed. The numerical simulation of 14-node NSFNet shows that it is very effective , While reducing the number of wavelength converters in an optical network and not increasing the number of optical networks, the existing network performance is basically maintained