An Experimental Study on IEEE 802.15.4 Multichannel Transmission to Improve RSSI?based Service Performance

In Wireless Sensor Networks (WSNs) the majority of the devices provide access to the Received Signal Strength Indicator (RSSI), which has been used as a means to enable different services and applications like localization, geographic routing and link quality estimation. Notwithstanding the popularity of using RSSI for localization, academic research showed that RSSI-based distance estimate is rather unreliable due to the random attenuation experienced by the radio signals, as the multipath fading. In this paper, the authors propose a simple way to improve the RSSI reliability, averaging samples collected at different frequencies by a CC2420 radio, which implements the IEEE 802.15.4 standard, both in real indoor and outdoor scenarios.

Provided by: University of Padova Topic: Mobility Date Added: Nov 2010 Format: PDF

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