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Modeling the link quality is essential in achieving and maintaining stable communication and minimizing energy consumption by controlling packet transmissions across a wireless sensor network. The quality of the communication links is a function of many variables including location, distance, direction and time. In this paper, the authors investigate the statistical channel models for spatial and temporal characteristics of link quality in different environments. These investigations are based on three metrics: Received Signal Strength Indicator (RSSI), Packet Loss Rate (PLR) and Link Quality Index (LQI).
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