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在无线传感器网(WSN)中,传感器节点的位置感知对于采集数据信息器提供有价值的环境信息十分必要。接收信号强度指示器(RSSI)技术不需要额外的硬件并且适用于室内与室外。RSSI具有一定的局限性,如高随机性导致的褪色和阴影,这使得建立RSSI值和距离之间的确切关系的困难。本文提出使用分层技术创建数据库来估计两个节点之间的距离,并根据这个数据库,完成对节点位置的估算。
In Wireless Sensor Network (WSN), the sensor node’s location awareness is essential for collecting data information to provide valuable environmental information. Received Signal Strength Indicator (RSSI) technology does not require additional hardware and is suitable for both indoor and outdoor use. RSSI has certain limitations, such as high-randomness-induced fading and shading, which makes it difficult to establish the exact relationship between RSSI values and distances. In this paper, we propose to use a hierarchical technology to create a database to estimate the distance between two nodes, and based on this database, estimate the location of nodes.