关键词: 定位, 无线传感网络, 核, 接受信号强度指示

Abstract: Localization is very important for the application of Wireless Sensor Network（WSN），but now the accuracy and stability of localization is not good enough.Received Signal Strength Indicator（RSSI） can be used to measure the distance between nodes in WSN.In this paper，core is introduced into WSN，a core is a body with three sensor nodes or more who have the fixed location relationship with each other.Core can localize other core or single sensor node，and also can be localized by WSN.Through simulation，it is found using core can improve accuracy of localization effectively.

Key words: localization, Wireless Sensor Network（WSN）, core, Received Signal Strength Indicator（RSSI）