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0该研究旨在通过利用现有近场（NF）用户的空间波束来服务额外的NF或远场（FF）用户，从而提升未来无线网络的吞吐量和连接性。文中提出了一种灵活的速率分裂多址（RSMA）方案，以有效管理干扰。该方案联合优化了波束调度、功率分配、公共速率分配和用户选择，以最大化额外用户的总速率。为解决由此产生的离散非凸问题，该研究将其分解为三个子问题，并通过加速二分搜索、二次变换和模拟退火等方法进行求解。仿真结果表明，所提出的传输方案和算法在性能上显著优于现有基准，尤其在干扰管理和波束调度方面展现出优势。
Joint Beam Scheduling and Resource Allocation for Flexible RSMA-Aided Near-Field Communications
Abstract:
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.
支持海量吞吐量和无处不在的连接对未来无线网络至关重要。为此，本文重点探讨如何利用为传统近场 (NF) 用户配置的空间波束来服务额外的 NF 或远场用户，同时确保传统 NF 用户的速率需求。具体而言，本文提出了一种灵活的速率分割多址 (RSMA) 方案来有效地管理干扰，该方案会仔细选择一部分传统用户来解码公共流。波束调度、功率分配、公共速率分配和用户选择被联合优化，以最大化额外用户的总速率。为了求解公式化的离散非凸问题，将其分解为三个子问题。本文开发了加速二分搜索、二次变换和模拟退火方法来求解这些问题。仿真结果表明，所提出的传输方案和算法在三个竞争基准测试中取得了显著的提升。
Published in: IEEE Wireless Communications Letters ( Volume: 14, Issue: 2, February 2025)
Page(s): 554 - 558
Date of Publication: 13 December 2024
ISSN Information:
Print ISSN: 2162-2337
Electronic ISSN: 2162-2345
