【作者】 李存义；

【导师】 吕振肃；

【作者基本信息】 兰州大学 ， 通信与信息系统， 2007， 硕士

【摘要】 光纤通信的产生和发展是电信史上的一场重要革命，特别是近年来随着数据业务的增长，网络的带宽需求呈现加速增长的趋势。这使光网络成为光纤通信技术活跃的领域。光网络优化设计成为研究的热点问题之一，国内外高校、研究机构都投入大量的人力、物力和财力致力于这方面的研究。本文首先明确了光网络的概念、分层模型、发展、特点、应用以及研究现状。接着阐述了光网络组网技术的优化，然后较详细地讲述了光网络优化设计的具体方法，并针对旅行商(Travalling Salesman Problem，TSP)问题，提出了一种改进的蚁群算法。这种算法引入了人工蚂蚁的最大最小信息素和信息素更新机制等，避免了过早停滞的缺点，增强了局部和全局的搜索能力，提高了解的质量。同时对改进算法进行了二十五个节点的仿真，其结果表现出较好的特性。目前我国的工程现状都是根据设计人员的经验和用户的需求来进行网络设计的，本文规划和仿真出九个节点的最短环路，用来指导环形光网络设计，随后使用华为的光网络设备组建网络，进一步验证了算法的可行性和有效性。最后部分对全文进行了总结，并对光网络的新技术和发展趋势进行了展望和预测。更多还原

【Abstract】 The generation and development of the fiber communication are a revolution on the history of telecommunication, particularly in recent years the increasing of data consumers and the broad-band demands have taken on increasing speed, this trend makes the Optical Networks the focus of the fiber communication field. The optimization of optical networks has become one of the most heated topics, both domestic and overseas, either in universities or research institutes. They have launched into a lot of manpower, material resources and enlist financial support to explore and research.Firstly, this thesis defines the concept, layering model, the developments, the traits, the application and present development about Optical Network. Secondly, the method of optimization design is expounded in great detail. An improved Ant colony Algorithm is put forword by contraposing the Travailing Salesman Problem (TSP). This Algorithm imports the MAX-MIN Pheromone and the Pheromone updating Mechanism of anificial ants, which avoids the defects of Prematurity stagnation. Thus improves the local and overall searching ability and enhances the quality of the solution.Simultaneously, this optimized algorithm is simulated on the network of twenty-five nodes. The result manifests better characteristics. Presently, the project designings are all based on the experiences of the designers and consumer’s demand. This thesis layouts and simulates the shortest ring path for nine nodes to illuminate the network of the design. Then facility for establishing network from Huawei company is used to representing the optimized feasibility and validity of this Algorithm.Finally, the thesis is summarized and the tendency of the new technology is forecasted.更多还原