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Technology of Network & Communication
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App. Res. of Comp. Printed Article
Vol. 41, 2024 No. 3
894-899

Research on information freshness of multiple access users in cognitive radio system

Yuan Shuaiqian1
Jia Xiangdong1,2
Shang Tongjian1
Sun Yangyang1
1. College of Computer Science & Engineering, Northwest Normal University, Lanzhou 730070, China
2. Wireless Communication Key Lab of Jiangsu Province, Nanjing University of Posts & Telecommunications, Nanjing 210003, China
DOI: 10.19734/j.issn.1001-3695.2023.08.0314

Abstract

In order to solve the problem of limited channel resources of the Internet of Things(IoT) and improve the information timeliness of the IoT system, this paper considered a multi-access cognitive radio(CR) IoT system model including one primary user(PU) and two secondary user(SU) nodes. Under the constraint of PU working state and SU data queue stability, the paper analyzed the average age of information(AoI) of the first secondary user node in the first come first served(FCFS), last come last served(LCLS) and the packet dropping queue, and derived the average AoI of the second SU node in the threshold strategy. Then, the paper proposed an optimization problem to minimize the average AoI of the first user and lower the average AoI of the second user below the given threshold. The constraint condition of the problem was convex, but the objective function was non-convex, so this paper introduced a suboptimal technique and obtained the optimal solution by double convex optimization algorithm. Simulation results show the performance of the proposed algorithm under different system parameters, and the algorithm performs well under the influence of different system parameters and multiple antennas. Subsequent work can consider extending CR IoT system to more than two SUs.

Foundation Support

国家自然科学基金资助项目(61861039,62261048)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2023.08.0314
Publish at: Application Research of Computers Printed Article, Vol. 41, 2024 No. 3
Section: Technology of Network & Communication
Pages: 894-899
Serial Number: 1001-3695(2024)03-037-0894-06

Publish History

[2023-09-28] Accepted Paper
[2024-03-05] Printed Article

Cite This Article

原帅前, 贾向东, 尚通健, 等. 认知无线电系统多接入用户信息新鲜度研究 [J]. 计算机应用研究, 2024, 41 (3): 894-899. (Yuan Shuaiqian, Jia Xiangdong, Shang Tongjian, et al. Research on information freshness of multiple access users in cognitive radio system [J]. Application Research of Computers, 2024, 41 (3): 894-899. )

About the Journal

  • Application Research of Computers Monthly Journal
  • Journal ID ISSN 1001-3695
    CN  51-1196/TP

Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

Aiming at the urgently needed cutting-edge technology in this discipline, Application Research of Computers reflects the mainstream technology, hot technology and the latest development trend of computer application research at home and abroad in a timely manner. The main contents of the journal include high-level academic papers in this discipline, the latest scientific research results and major application results. The contents of the columns involve new theories of computer discipline, basic computer theory, algorithm theory research, algorithm design and analysis, blockchain technology, system software and software engineering technology, pattern recognition and artificial intelligence, architecture, advanced computing, parallel processing, database technology, computer network and communication technology, information security technology, computer image graphics and its latest hot application technology.

Application Research of Computers has many high-level readers and authors, and its readers are mainly senior and middle-level researchers and engineers engaged in the field of computer science, as well as teachers and students majoring in computer science and related majors in colleges and universities. Over the years, the total citation frequency and Web download rate of Application Research of Computers have been ranked among the top of similar academic journals in this discipline, and the academic papers published are highly popular among the readers for their novelty, academics, foresight, orientation and practicality.

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