Title: Joint spatial-temporal access scheme of multi-hop cognitive radio sensor networks

Authors: Chi Xu; Meng Zheng; Wei Liang; Haibin Yu; Youjian Zhao

Addresses: Key Laboratory of Networked Control Systems, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China; University of Chinese Academy of Sciences, Beijing 100049, China ' Key Laboratory of Networked Control Systems, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China ' Key Laboratory of Networked Control Systems, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China ' Key Laboratory of Networked Control Systems, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China ' Department of Computer Science and Technology, Tsinghua University, Beijing 100048, China

Abstract: This paper studies a novel channel access scheme for delay-sensitive multi-hop cognitive radio sensor networks (CRSNs) with fixed decode-and-forward relaying. We first formulate a two-dimensional spatial-temporal opportunity model wherein free and sharing opportunities are defined, and then propose a joint spatial-temporal access scheme (JSTAS) to achieve successive channel access for continuous data transmission. By spatial sensing and temporal sensing, the cognitive sensors with JSTAS control the transmission powers by fully considering their maximum transmission powers, the interference constraints of multiple primary receivers and the interference from one primary transmitter. To evaluate JSTAS, we derive the closed-form outage probability under Rayleigh fading channels and make comparisons among five different schemes. Simulation results demonstrate that JSTAS has better outage performance than that of pure spatial or temporal access scheme under all considered scenarios.

Keywords: CRSNs; cognitive radio sensor networks; cognitive sensor; multi-hop; delay-sensitive; spatial-temporal opportunity; spectrum sharing; temporal sensing; spatial sensing; channel access; outage probability; outage capacity.

DOI: 10.1504/IJSNET.2017.086789

International Journal of Sensor Networks, 2017 Vol.25 No.1, pp.1 - 12

Received: 02 Jul 2015
Accepted: 09 May 2016
Published online: 26 Sep 2017 *

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