论文标题
同时传输和反映RIS辅助的移动边缘计算：计算速率最大化
Simultaneously Transmitting and Reflecting RIS-Aided Mobile Edge Computing: Computation Rate Maximization
论文作者
论文摘要
在本文中，在多用户移动边缘计算（MEC）系统中研究了新颖的小说，同时传输和反射（星形）可重构智能表面（RIS），可在地面两侧的用户上进行全空间覆盖。计算速率最大化问题是通过星线相移的联合设计，反射和传输幅度系数，接入点处的接收波束成形向量以及用户对本地计算和卸载的能量分区策略来提出的。研究了两个星际 - 瑞斯的操作协议，即能量分解（ES）和模式切换（MS）。基于DC编程和半决赛松弛，为ES方案提出了一种迭代算法，以解决公式的非凸问题。此外，提出的算法扩展了以解决非凸的非连续MS问题，具有二元振幅系数。仿真结果表明，与基线方案相比，与基线方案相比，所得的Star-Ris辅助MEC系统与常规仅反射/仅发射仅RI相比显着提高了计算率。
In this paper, the novel simultaneously transmitting and reflecting (STAR) reconfigurable intelligent surface (RIS), which enables full-space coverage on users located on both sides of the surface, is investigated in the multi-user mobile edge computing (MEC) system. A computation rate maximization problem is formulated via the joint design of the STAR-RIS phase shifts, reflection and transmission amplitude coefficients, the receive beamforming vectors at the access point, and the users' energy partition strategies for local computing and offloading. Two operating protocols of STAR-RIS, namely energy splitting (ES) and mode switching (MS) are studied. Based on DC programming and semidefinite relaxation, an iterative algorithm is proposed for the ES protocol to solve the formulated non-convex problem. Furthermore, the proposed algorithm is extended to solve the non-convex, non-continuous MS problems with binary amplitude coefficients. Simulation results show that the resultant STAR-RIS-aided MEC system significantly improves the computation rate compared to the baseline scheme with conventional reflect-only/transmit-only RIS.
