【摘要】 针对现有网络在可靠性和服务质量方面所存在的缺陷,以增强网络生存性为目标,对现有IP网络的生存性机制进行了研究。以路径相异性为基础,提出一种具有生存性的Overlay网络构建方法。构建过程使用重叠惩罚思想为每个源—目的对按照业务的QoS参数计算合适的路径,由这些路径构成节点对之间的Overlay虚拟拓扑。此网络拓扑不仅可以保证故障情况下的合理路径快速倒换,而且可以满足业务的需求。使用路径相似度和路径查询时间两个指标对基于重叠惩罚的路径选择算法进行了评价,仿真结果表明本算法可以按照业务的参数计算出满足业务需求的合理路径,可以顺利地构造出面向业务的具有生存性的Overlay网络。更多还原

【Abstract】 In view of the defect of the existing network in reliability and service quality,enhancing network survivability as a goal,researched on the survivability mechanism of the existing IP network.Based on the path diversity,this paper put forward a kind of construction method of survivability Overlay network.During the construction process,computing suitable path using the thought of overlapping penalty and according to the QoS parameter of the service for each source destination,constructed the Overlay virtual topology by the path between the pair of the nodes.The network topology can not only ensure the path switching as the condition of the fault,but also can meet the needs of the business.It evaluated the path selection based on overlapping by two indicators that was the similarity of path and the path query time,the simulation results show that the algorithm can calculate the reasonable path that can meet the needs of the business in accordance with the operational parameters,so can construct the survivability Overlay network orienting the business successfully.更多还原