App. Res. of Comp. Accepted Paper
Vol. 43, 2026 No. 9

Performance analysis of CR-RSMA networks with multi-RIS and HARQ assistance

Zhou Yongqiang
Bai Xiaoxue
School of Science, Lanzhou University of Technology, Lanzhou 730050, China
DOI: 10.19734/j.issn.1001-3695.2026.02.0029

Abstract

To address direct link blockage in practical communications, this paper proposed a cooperative scheme integrating multiple reconfigurable intelligent surfaces (RIS) and hybrid automatic repeat request (HARQ) . Within the framework of cognitive radio (CR) networks, a secondary transmitter (ST) adopted rate-splitting multiple access (RSMA) to deliver information to two secondary users (SUs) . Under Nakagami-m fading, derivation yielded signal-to-interference-plus-noise ratio (SINR) for RSMA users. Based on this derivation, this paper obtained outage probability (OP) for two SUs and system throughput under HARQ mechanism. Further analysis compared system performance under perfect and imperfect successive interference cancellation (SIC) scenarios. Simulation results demonstrate that, compared to the single-RIS-assisted CR-RSMA network, the proposed multi-RIS-assisted scheme reduces the transmit power required for the near user by approximately 15.8 dB at an OP of 1.0×10-3. Moreover, the proposed scheme effectively compensates for system performance degradation caused by imperfect SIC. The cooperative multi-RIS and HARQ scheme significantly reduces transmit power demand of CR-RSMA networks and enhances link reliability in cognitive radio networks.

Key Words

HARQ CR RSMA OP throughput

Foundation Support

国家自然科学基金资助项目(61663024,62467004)
博士基金资助项目(05-061405)
甘肃省高等学校创新基金资助项目(2022A-019)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2026.02.0029
Publish at: Application Research of Computers Accepted Paper, Vol. 43, 2026 No. 9

Publish History

[2026-06-02] Accepted Paper

Cite This Article

周永强, 白晓雪. 基于多RIS和HARQ辅助的CR-RSMA网络性能分析 [J]. 计算机应用研究, 2026, 43 (9). (2026-06-02). https://doi.org/10.19734/j.issn.1001-3695.2026.02.0029. (Zhou Yongqiang, Bai Xiaoxue. Performance analysis of CR-RSMA networks with multi-RIS and HARQ assistance [J]. Application Research of Computers, 2026, 43 (9). (2026-06-02). https://doi.org/10.19734/j.issn.1001-3695.2026.02.0029. )

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  • Application Research of Computers Monthly Journal
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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.

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