目前移动主机普遍具有多个网络接口,可以由这些接口通过不同的网络服务提供商(ISP)接入到Internet中.因此,移动主机与Internet之间就可能存在多条路径,通信的费用和性能取决于ISP的收费策略和网络通信性能.文中首先对移动主机与Internet通信进行建模,然后提出一种基于主动探测可用路径的最优化费用和性能的流量分配方法.最后,对此方法进行仿真,并与几种常见流量分配方法进行对比.结果表明本文所提出的方法能根据主机对费用和性能的需求合理分配和控制流量.%Nowadays, more and more mobile hosts have multiple network interfaces, through which the hosts can connect to different ISPs and access the Internet. In this situation, there are multiple paths between the mobile hosts and the Internet. The cost and performance of these paths depends on the ISP charging strategy and the network communication capability. This paper models the communication between mobile hosts and the Internet, and then proposes a flow distribution method for optimizing cost and performance based on available path exploration. At the end, simulation on the method is presented. Compounded with other methods, our method can better distribute and control traffic flow according to the mobile hosts's needs for cost and performance.
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