在可靠性限制下的RIS辅助URLLC系统中尽量减少延迟
Xiaoyang Song1, Yingxin Zhao1,2, Wannan Zhao1
1College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China.
Entropy (Basel, Switzerland)
|June 28, 2023
概括
可重新配置的智能表面 (RIS) 增强了物联网 (IoT) 的超可靠的低延迟通信 (URLLC). 我们的ADMM算法尽量减少延迟,同时确保可靠性,优于传统方法.
科学领域:
- 无线通信无线通信
- 信号处理 信号处理
- 物联网的物联网,就是物联网.
背景情况:
- 超可靠和低延迟通信 (URLLC) 对物联网 (IoT) 网络至关重要.
- 严格的服务质量 (QoS) 要求需要提高链路质量和可靠性.
- 可重新配置的智能表面 (RIS) 为改善URLLC系统中的链接质量提供了一个有希望的解决方案.
研究的目的:
- 在RIS辅助的URLLC上链系统中最大限度地降低传输延迟.
- 满足物联网应用程序的严格可靠性约束.
- 开发一个低复杂度的算法,以优化RIS相位移.
主要方法:
- 在可靠性约束下,将延迟最小化作为问题.
- 采用了乘数的交替方向方法 (ADMM) 来解决非凸的优化问题.
- 解决了RIS相位转移优化问题,将其制定为一个方程约束方程编程 (QCQP) 问题.
主要成果:
- 与传统的半确定的放松 (SDR) 方法相比,提出的基于ADMM的方法取得了更高的性能.
- 显示的计算复杂性明显低于基于SDR的方法.
- 实现了对RIS辅助URLLC系统的传输延迟大幅降低.
结论:
- 拟议的ADMM算法有效地减少了RIS辅助URLLC系统中的延迟.
- RIS的部署显示了在苛刻的物联网网络中提高可靠性的巨大潜力.
- 该方法为未来的URLLC应用提供了实用和高效的解决方案.
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