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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．
QoS cast stream will have staggered service problems, resulting in a lot of waste of network and server resources, so routing optimization is a must. The architecture of application layer QoS routing system is presented. An optimized server is designed. The server collects and optimizes relevant information from other types of servers in real time. After periodic calculation, it sends adjustment instructions to all clients. The requirements of the adjustment instruction switch the destination address of the QoS data stream to the new cast server. The experimental results show that this method can reduce the waste of network resources caused by interleaving service and obtain the best optimization effect when the adjustment period is equal to the average transmission time of the selection stream. In this case, the network can transmit the QoS selective streaming stream by more than 1/4 .