粗粒度定位系统利用接收信号强度作为判定依据，估计待测位置节点所位于的区域，而不是具体的坐标值。

CLS takes the wireless signal strength as the reference for distance and gets the rough area the target located.

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图中的箭头表示指向内存中下一个节点位置的指针。

The arrows in this diagram represent Pointers to the location of the next node in memory.

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规定位置，节点，以及连接性。

Provision locations, nodes, and connectivity.

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