文中从卫星网络特点出发，给出一个可以反映卫星网络时变拓扑特点的网络模型。
In this paper, the characteristic of satellite network is analyzed, and a network model which can express the characteristic of satellite network topological time-varying is proposed.
自组织网络中无线信道的时变特性和网络拓扑的不断变化导致了链路的频繁断续，使得数据包大量丢失。
In AdHoc network, the pause of chain-lines is caused by the continuous change of wireless channel and the expanding of network, which leads to the loss of the data package.
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