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。
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.
无线传感器网络通常部署在不可到达或危险区域，其能量十分有限。
Wireless sensor networks are usually deployed throughout inaccessible or hazardous regions with limited energy resources.
无线传感器网络通常部署在不可到达或危险区域，其能量十分有限。
Wireless sensor networks are usually deployed throughout inaccessible or hazardous regions with limited energy resources.
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