Enhanced Multiband Multiuser Cooperative Spectrum Sensing for Distributed CRNs

被引:23
作者
Gharib, Anastassia [1 ]
Ejaz, Waleed [2 ]
Ibnkahla, Mohamed [1 ]
机构
[1] Carleton Univ, Dept Syst & Comp Engn, Ottawa, ON K1S 5B6, Canada
[2] Thompson Rivers Univ, Dept Appl Sci & Engn, Kamloops, BC V2C 0C8, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Cognitive radio; cooperative spectrum sensing; distributed adaptation; k-means classification; multi-band; COGNITIVE-RADIO; RESOURCE-ALLOCATION; IOT;
D O I
10.1109/TCCN.2019.2953661
中图分类号
TN [电子技术、通信技术];
学科分类号
0809 ;
摘要
Multi-band cooperative spectrum sensing (CSS) can provide opportunistic spectrum access to secondary users (SUs) in cognitive radio networks (CRNs). In multi-band CSS, the sensing task is divided among SUs based on their capability, residual energy, channel conditions, etc. However, SUs' scheduling to sense a subset of channels in distributed CRNs is challenging mainly because of the lack of a central entity and the changing conditions due to new SUs entering the network. To address these challenges, we propose a two-stage multi-band multi-user CSS (M2CSS) scheme to assign a subset of channels to SUs for spectrum sensing. We first formulate an optimization problem to choose a leader for each channel. We then formulate an optimization problem to select cooperative SUs for each channel such that SUs with similar sensing information for the same channel are not selected. Further, we propose an enhanced M2CSS (EM2CSS) scheme to allow new SUs to participate in the sensing process. We formulate an optimization problem to assign multiple channels to joining SUs. We then distribute the sensing assignments among existing and joining SUs to minimize sensing energy consumption. Extensive simulation results show the efficacy of the proposed schemes when compared to existing schemes.
引用
收藏
页码:256 / 270
页数:15
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