The wireless sensor network routing has shortcoming which the data cannot reach in certain topology when completely uses the no state routing based on positional information, namely death points.
基于位置信息的无线传感器网络如果完全采用无状态的方式路由，在某些拓扑结构中存在数据不可到达的缺陷，即死亡点的问题。
By controlling flood of link state information, LEO satellites could acquire local topology information to route the short-distance traffics. The long-distance traffics were routed in MEO layer.
通过控制链路状态信息的洪泛，LEO卫星只需掌握局部拓扑即可完成短距业务通信，长距通信业务则由MEO卫星承载。
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