JWCN_V2_N2_RP3 Mary Livinsa S. Jayashri Journal On Wireless Communication Networks 2320 - 2351 2 2 22 27 Wireless Sensor Network, Distance Estimation Method, Trilateration Method, Received Signal Strength Indicator Z.Mary Livinsa and S.Jayashri deliberate a Received Signal Strength Indicator(RSSI) to estimate the distance between two sensor nodes in a WSNs that ingests the built in RSSI circuit board inside the sensor’s transceivers chipsets. AmicaZ platform is used which is based on the radio chip CC2420 that operates in 2.4GHZ band using an effective data rate of 256Kbps.The experiment repeated for 100 times and the error range is an average of 2.034m. July - September 2013 Copyright © 2013 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2434