价格低廉的卫星只收接收器能接收卫星发送的高带宽的数据，但是它不能向卫星发送数据．这样，卫星到这种接收器的链路就是单向的链路．现有的路由协议要求每条链路都是双向链路，不能处理单向链路的问题．一些学者利用“隧道”方法来解决这个问题．但是，这种方法需要事先知道一条从接收者到卫星上行链路发送站的“隧道”，因而不能适应网络拓扑结构的动态变化．文章提出了一种动态路由算法，它能用于具有单向链路的网络，并能适应网络拓扑结构的动态变化 A low cost satellite receiver can receive high bandwidth data from satellites, but it can not send data to satellites. In this way, the satellite to the receiver link is a one-way link. Existing routing protocols require that each link be a bidirectional link and can not handle the problem of unidirectional links. Some scholars use the “tunnel” method to solve this problem. However, this method requires prior knowledge of a “tunnel” from the receiver to the satellite uplink transmitting station and therefore can not accommodate the dynamic changes in the network topology. This paper presents a dynamic routing algorithm, which can be used for unidirectional links in the network, and can adapt to the dynamic changes in the network topology