Robust Distributed Power Control for Cognitive Radio based Industrial Wireless Sensor Networks
Tran Minh Phuong, Dong‐Seong Kim · Advanced Science and Technology Letters · 2013
Cognitive radio sensor network (CRSN) has emerged as a promising solution to address the spectrum-related challenges of wire- less sensor networks (WSN). Moreover, cognitive radio (CR) gives us a possibility to maximize the utilization efficiency of limited spectrum re- sources. In this paper, we propose an intelligent power control scheme to address the communication requirements in cognitive radio based indus- trial wireless sensor networks (CR-IWSN). Cognitive Radio Sensor Networks (CRSN) was considered as a promising tech- nique to overcome similar challenges observed in traditional wireless sensor net- works (2), and has been integrated in current and future radio access networks through recent literatures (3). Power allocation plays important role in multiuser spectrum sharing cognitive radio based industrial wireless sensor networks be- cause of the channel interference in radio transmission and interference temper- ature regulation. Therefore, how to allocate the transmit power to sensor nodes with a view to satisfying the interference threshold and maximizing the SUs' utilities is an important task in the implementation of cognitive radio based industrial wireless sensor networks. In this paper, we consider the underlay CR-IWSN where SUs and PUs com- municate with their SBSs and PBSs, respectively. Our objective is to optimizing the throughput of SUs and energy efficiency that can be supported, subject to the following constrains: - R1: Each SUs' required normalized SINR must be above a predefined thresh- old.