Recently, the hybrid relay-reflecting intelligent surface (HRRIS) has been introduced as a spectral- and energy-efficient architecture to assist wireless communication systems. In the HRRIS, a single or few active relay elements are deployed along with a large number of passive reflecting elements, allowing it to not only reflect but also amplify the incident signals. In this work, we investigate the potential of the HRRIS in aiding the computation offloading in a single-user mobile edge computing system. The objective is to minimize the offloading latency while ensuring the secrecy of user data against a malicious eavesdropper. We develop efficient solutions to this latency minimization problem based on alternating optimization. Through numerical results, we show that the deployment of the HRRIS can result in a considerable reduction in latency. Furthermore, the latency reduction gain offered by the HRRIS is much more significant than that of the conventional reconfigurable intelligent surface (RIS).
翻译:最近,引入了混合中继反射智能表面(HRRIS),作为光谱和节能结构,协助无线通信系统。在HRRIS中,一个或几个主动中继元与大量被动反射元一起部署,使其不仅能够反映事件信号,而且能够扩大事件信号。在这项工作中,我们调查HRRIS在协助单用户移动边缘计算系统中进行卸载计算方面的潜力。目标是尽量减少卸载的延迟,同时确保用户数据对恶意窃听器的保密性。我们在交替优化的基础上,为延缓最小化问题制定了高效解决方案。我们通过数字结果显示,部署HRRIS可以大大降低延缓性。此外,HRRIS提供的延缓性收益比传统的可重新配置智能表面(RIS)要重要得多。