An Efficient Ordered Sequential Cooperative Spectrum Sensing Scheme Based on Evidence Theory in Cognitive Radio

作者：Nhan Nguyen Thanh^*; Koo Insoo

来源：IEICE - Transactions on Communications, 2010, E93B(12): 3248-3257.

DOI：10.1587/transcom.E93.B.3248

• cognitive radio
• cooperative spectrum sensing
• data fusion
• Dempter Shafer theory of evidence
• sequential fusion
• ordered sequential fusion

Spectrum sensing is a fundamental function for cognitive radio network to protect transmission of primary system Cooperative spectrum sensing which can help increasing sensing performance is regarded as one of the most promising methods in realizing a reliable cognitive net work In such cooperation system however the communication resources such as sensing time delay control channel bandwidth and consumption energy for reporting the cognitive radio node s sensing results to the fusion center may become extremely huge when the number of cognitive users is large In this paper we propose an ordered sequential cooperative spectrum sensing scheme in which the local sensing data will be sent according to its reliability order to the fusion center In proposed scheme the sequential fusion process is sequentially conducted based on Dempster Shafer theory of evidence s combination of the reported sensing results Above all the proposed scheme is highly feasible due to the proposed two ordered sequential reporting methods From simulation results it is shown that the proposed technique not only keeps the same sensing performance of non sequential fusion scheme but also extremely reduces the reporting resource requirements

• 出版日期2010-12