论文标题
RIS辅助合作RSMA蜂窝网络中的能耗优化
Energy Consumption Optimization in RIS-Assisted Cooperative RSMA Cellular Networks
论文作者
论文摘要
本文提出了一个可下行的可重构智能表面（RIS）辅助半双链（HD）合作率，分解了多个访问（C-RSMA）网络。拟议的系统模型是在考虑一个基站（BS），一个RI和两个用户的情况下建立的。为了最大程度地减少网络能耗的目的，一个旨在优化BS的预码矢量的框架，公共流拆分，中继设备传输功率，时间插槽分配以及在RIS上受到电源预算约束的无源光束在BS和相关节点的质量（QOS）构成（QOS）的质量（QOS）限制率和常见的IS Commoraint and Commoraint and Commoraint and Commoraint and Commoraint and Commoraint。公式的问题是由于优化变量之间的高耦合而导致的非凸优化问题。为了应对这一挑战，通过调用交替优化技术来提出有效的算法，该技术将原始问题分解为两个子问题。也就是说，sub-Problem-1和子问题2，可以解决。具体而言，子问题1是共同优化预编码矢量，公共流拆分和中继设备功率。同时，子问题2是优化RIS处的相移矩阵。为了求解子问题1，提出了基于连续凸近似（SCA）的有效低复杂性解决方案。同时，借助征链级等级表示和SCA方法，获得了RIS处的相移矩阵的有效解决方案。模拟结果表明，与RIS辅助的RIS辅助的HD合作非正交多多访问（C-Noma）相比，提出的RIS辅助HD C-RSMA可最大程度地降低总能耗（C-NOMA），RIS辅助Noma，Noma，HD C-RSMA，HD C-RSMA无RIS和HD ris ris ris RIS RIS。
This paper presents a downlink reconfigurable intelligent surface (RIS)-assisted half-duplex (HD) cooperative rate splitting multiple access (C-RSMA) networks. The proposed system model is built up considering one base station (BS), one RIS, and two users. With the goal of minimizing the network energy consumption, a joint framework to optimize the precoding vectors at the BS, common stream split, relaying device transmit power, the time slot allocation, and the passive beamforming at the RIS subject to the power budget constraints at both the BS and the relaying node, the quality of service (QoS) constraints at both users, and common stream rate constraint is proposed. The formulated problem is a non-convex optimization problem due to the high coupling among the optimization variables. To tackle this challenge, an efficient algorithm is presented by invoking the alternating optimization technique, which decomposes the original problem into two sub-problems; namely, sub-problem-1 and sub-problem-2, which are alternatively solved. Specifically, sub-problem-1 is to jointly optimize the precoding vectors, common stream split, and relaying device power. Meanwhile, sub-problem-2 is to optimize the phase shift matrix at the RIS. In order to solve sub-problem-1, an efficient low-complexity solution based on the successive convex approximation (SCA) is proposed. Meanwhile, and with the aid of difference-of-convex rank-one representation and the SCA approach, an efficient solution for the phase shift matrix at the RIS is obtained. The simulation results demonstrate that the proposed RIS-assisted HD C-RSMA achieves a significant gain in minimizing the total energy consumption compared to the RIS-assisted RSMA scheme, RIS-assisted HD cooperative non-orthogonal multiple access (C-NOMA), RIS-assisted NOMA, HD C-RSMA without RIS, and HD C-NOMA without RIS.
