Probe-Based Transmission Power Control for Dependable Wireless Sensor Networks

Abstract

Abstract-Dependable Wireless Sensor Networks for industrial process automation, monitoring and control applications have high demands regarding network reliability in terms of timely delivery and packet loss. In large industrial facilities, interference between neighboring networks is a major problem that can be mitigated by reducing the radio transmission power to the necessary minimum. However, reliability of the network should not be compromised even in spite of packet loss bursts.In this paper we aim at keeping the link within certain burstiness bounds while still minimizing the transmission power. We present evaluation results showing that the burstiness changes with the receiver signal strength. Based on this observation we present two mechanisms for dependable wireless sensor networks and study the performance in our testbed.

Transmission power control for interference minimization in WSNs

“…By taking the SNR and using it in the following formula the transmission power for the next packet is calculated. P t = P t 1 + K p £ (SNR p SNR c ) (6) As seen from the formula the controller implemented here is a proportional controller. P t is the transmission power level for the next packet and P t 1 the one for the last packet.…”

“…This can be done because the static part of the link characteristics will be used from the former calculation. Another approach was published by Pöttner et al [6]. Here the sender stores the transmission power for every packet and the receiver measures the RSSI.…”