【摘要】 QoS 选播流会产生交错服务问题,造成大量的网络和服务器资源浪费,因此进行路由优化是必须的．提出了应用层 QoS 选播流路由优化系统的构架,设计了一种优化服务器,该服务器从其他类型的服务器实时收集优化相关信息,经过周期性计算以后向各个客户端发送调整指令,客户端按照调整指令的要求将 QoS 数据流传输的目标地址切换到新的选播服务器上．实验结果表明这种方法可以减少交错服务所造成的网络资源浪费,在调整周期等于选播流平均传输时间时获得最佳优化效果,此时网络传输 QoS 选播流的能力可以提高1／4以上．更多还原

【Abstract】 QoS anycast flows can bring about the problem of Cross Service,and waste many network resources and servers,so it is necessary to optinfize routing.This paper proposes the architecture and implement of routing optimization system for application-layer QoS anycast flows.The designed optimization server collects real-time information related to optimization from the servers of other types and sends adjusting instruction to every client after periodical computing.Then the client switches the destination address of the data flow transmission to the new anyeast server according to the request of adjusting instruction.Simulation results show that this method can reduce the network resource wasted by Cross Service.The best result,by which the capability of network transmitting QoS anycast flows can improve more than 1/4,is reached when the adjusting period is equal to the average transmission time of anycast flows.更多还原