Massive multiple-input multiple-output (mMIMO) technology and its future evolutions are expected to address the high data rate demands of sixth generation (6G) communication systems. At the same time, network energy savings (NES) is essential in reducing the operational costs and meeting the sustainability goals of network operators. In this regard, we propose a dynamic scheme for joint antenna and power adaptation to improve NES from a user scheduling and resource allocation perspective. Antenna adaptation is performed using the multiple channel state information resource signal (CSI-RS) framework. Furthermore, the recently introduced transmit power-aware link adaptation scheme, referred to as POLITE for short, is used as the power adaptation technique. The proposed scheme adapts to variations in users' instantaneous traffic and channel conditions to opportunistically maximize NES while also inherently accounting for the user throughput. Numerical simulation results show that the proposed scheme consistently achieves a balance between NES and user perceived throughput (UPT) for different network load conditions. Especially in low and light load conditions, the proposed scheme significantly improves the intra-cell interference and boosts the overall NES, while ensuring that UPT is unaffected.

翻译：大规模多输入多输出（mMIMO）技术及其未来演进有望满足第六代（6G）通信系统对高数据速率的需求。与此同时，网络节能（NES）对于降低运营成本及满足网络运营商的可持续发展目标至关重要。为此，本文从用户调度与资源分配的角度出发，提出了一种动态天线与功率联合自适应方案以提升网络节能效果。天线自适应通过多信道状态信息参考信号（CSI-RS）框架实现。此外，功率自适应技术采用近期提出的发射功率感知链路自适应方案（简称POLITE）。所提方案能够适应用户瞬时业务量与信道条件的变化，在兼顾用户吞吐量的同时，机会性地最大化网络节能。数值仿真结果表明，在不同网络负载条件下，所提方案均能持续实现网络节能与用户感知吞吐量（UPT）之间的平衡。尤其在低负载与轻负载场景下，该方案显著改善了小区内干扰，大幅提升了整体网络节能效果，同时确保用户感知吞吐量不受影响。