Joint Beam Scheduling and Resource Allocation for Flexible RSMA-aided Near-Field Communications

作     者：Zhou, Jiasi Zhou, Cong Mao, Yijie Tellambura, Chintha 

作者机构：School of Medical Information and Engineering Xuzhou Medical University Xuzhou221004 China School of Electronic and Information Engineering Harbin Institute of Technology Harbin150001 China School of Information Science and Technology Shanghai Tech University Shanghai201210 China Department of Electrical and Computer Engineering University of Alberta EdmontonABT6G 2R3 Canada 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2024年

核心收录：

主　　题：Near field communication 

摘      要：Supporting immense throughput and ubiquitous connectivity holds paramount importance for future wireless networks. To this end, this letter focuses on how the spatial beams configured for legacy near-field (NF) users can be leveraged to serve extra NF or far-field users while ensuring the rate requirements of legacy NF users. In particular, a flexible rate splitting multiple access (RSMA) scheme is proposed to efficiently manage interference, which carefully selects a subset of legacy users to decode the common stream. Beam scheduling, power allocation, common rate allocation, and user selection are jointly optimized to maximize the sum rate of additional users. To solve the formulated discrete non-convex problem, it is split into three subproblems. The accelerated bisection searching, quadratic transform, and simulated annealing approaches are developed to attack them. Simulation results reveal that the proposed transmit scheme and algorithm achieve significant gains over three competing benchmarks. Copyright © 2024, The Authors. All rights reserved.