Energy-aware cooperative spectrum sensing for underground cognitive sensor networks

LIANG Quan-quan
March 2014
Journal of Measurement Science & Instrumentation;Mar2014, Vol. 5 Issue 1, p46
Academic Journal
With the development of wireless technologies, multifarious standards are currently used in the underground coal mine communication systems, In this paper, the coexistence of 802.15.4 based wireless senser networks (WSNs) with other wireless networks using cognitive radio technique are discussed. Multiple sensor nodes are involved in the spectrum sensing to avoid the interference from other wireless users. The more the sensor nodes cooperate in the sensing, the better the detection performance can be obtained; however, more energy is consumed. How to get the tradeoff between energy efficiency and detection performance is a key problem. According to the requirements for detection, we first give the least required detection time of a single sensor node. Then, the voting fusion rule is adopted for the final decision making. Finally, the relationship between final detection performance and energy consumption is analyzed.


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