考虑队列稳定性的IRS辅助星地融合鲁棒传输方法

doi:10.12305/j.issn.1001-506X.2025.12.32

系统工程与电子技术 ›› 2025, Vol. 47 ›› Issue (12): 4203-4211.doi: 10.12305/j.issn.1001-506X.2025.12.32

• 通信与网络 • 上一篇

考虑队列稳定性的IRS辅助星地融合鲁棒传输方法

何歆成¹(), 赵柏¹, 林志², 王子宁¹, 欧阳键¹^,*

1. 南京邮电大学通信与信息工程学院，江苏南京 210003
2. 国防科技大学电子制约技术安徽省重点实验室，安徽合肥 230037

收稿日期:2024-08-02 修回日期:2025-02-03 出版日期:2025-04-22 发布日期:2025-04-22
通讯作者: 欧阳键 E-mail:hexincheng20000116@163.com
作者简介:何歆成（2000—），男，硕士研究生，主要研究方向为无线通信系统、智能反射面
赵　柏（1995—），男，博士研究生，主要研究方向为卫星通信、智能信号处理、混合多址接入技术
林　志（1992—），男，副教授，博士，主要研究方向为卫星通信、智能信号处理、天线新技术
王子宁（1997—），男，博士研究生，主要研究方向为卫星通信、智能信号处理、多目标优化
基金资助:
电子制约技术安徽省重点实验室开放课题（ERKL2023KF04）；江苏省研究生科研与实践创新计划（KYCX24_1174）资助课题

Robust transmission method for IRS assisted satellite-terrestrial fusion considering queue stability

Xincheng HE¹(), Bai ZHAO¹, Zhi LIN², Zining WANG¹, Jian OUYANG¹^,*

1. College of Communications and Information Engineering，Nanjing University of Posts and Telecommunications，Nanjing 210003，China
2. Anhui Province Key Laboratory of Electronic Restriction，National University of Defense Technology，Hefei 230037，China

Received:2024-08-02 Revised:2025-02-03 Online:2025-04-22 Published:2025-04-22
Contact: Jian OUYANG E-mail:hexincheng20000116@163.com

摘要/Abstract

摘要：

由电磁超材料构成的智能反射面（intelligent reflecting surface，IRS）具备增强信号质量、降低通信能耗等优势，在无线通信领域得到了广泛的研究。针对卫星网络和地面网络共享频谱资源的场景，提出了满足队列稳定性的IRS辅助的星地融合网络下行链路鲁棒传输方案，其中卫星系统采用多播技术在IRS的辅助下服务多个用户，而基站采用空分多址技术服务多个地面用户。假设仅已知用户的非完美信道信息，以队列传输稳定性和所有用户服务质量为约束条件，以最小化系统时间平均总发射功率为优化目标，建立一个长时隙优化问题。接着，提出利用Lyapunov优化技术将长期优化问题转换为单时隙优化问题，并进一步通过S-procedure和连续凸逼近方法的有效结合处理包含信道误差的非凸约束，获得优化问题的最优解，实现队列稳定条件下的星地融合鲁棒无线传输。最后，计算机仿真结果表明，跟现有方案相比，本文所提方案具有更优的队列稳定性以及更低的系统能耗。

关键词: 星地融合网络, 智能反射面, 队列传输, 非完美信道状态信息, Lyapunov优化

Abstract:

Intelligent reflecting surfaces （IRS）, composed of electromagnetic metamaterials, offer advantages such as enhanced signal quality and reduced communication energy consumption, making them a widely researched topic in the field of wireless communications. For scenarios where satellite and terrestrial networks share spectrum resources, an IRS-assisted robust downlink transmission scheme for satellite-terrestrial integrated networks that satisfies queue stability is proposed. In this scheme, the satellite system uses multicast technology to serve multiple users with the assistance of IRS, while the base station employs space division multiple access to serve multiple terrestrial users. Assuming only imperfect channel state information of the users is available, a long-timescale optimization problem with the goal of minimizing the time-averaged total transmission power is established, subject to queue transmission stability and quality of service constraints for all users. Utilize the Lyapunov optimization technique to convert the long-term optimization problem into a single-time-slot optimization problem. Furthermore, we address the non-convex constraints that include channel errors through an effective combination of the S-procedure and the successive convex approximation method to obtain the optimal solutions to the optimization problem, achieving robust wireless transmission in the satellite-terrestrial integrated network under queue stability conditions. Finally, computer simulation results demonstrate that the proposed scheme provides better queue stability and lower system energy consumption compared to existing schemes.

Key words: satellite-terrestrial integrated network （STIN）, intelligent reflecting surface （IRS）, queue transmission, imperfect channel state information, Lyapunov optimization

中图分类号:

TN929.5

何歆成, 赵柏, 林志, 王子宁, 欧阳键. 考虑队列稳定性的IRS辅助星地融合鲁棒传输方法[J]. 系统工程与电子技术, 2025, 47(12): 4203-4211.

Xincheng HE, Bai ZHAO, Zhi LIN, Zining WANG, Jian OUYANG. Robust transmission method for IRS assisted satellite-terrestrial fusion considering queue stability[J]. Systems Engineering and Electronics, 2025, 47(12): 4203-4211.

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参数	数值
卫星轨道	地球静止轨道
卫星天线增益${G_{s,t}} /{\mathrm{dB}} $	$ 52 $
用户接收增益${G_r} /{\text{ dB}} $	$ 16 $
卫星天线数$ {N_s} $	$ 7 $
IRS规模	$ 4 \times 4 $
BS天线数${N_r} $	$ 16 $
天线阵元间距	$ {d_x} = {d_y} = \lambda /2 $

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考虑队列稳定性的IRS辅助星地融合鲁棒传输方法

Robust transmission method for IRS assisted satellite-terrestrial fusion considering queue stability

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