IEEE 802.11 networks continuously adapt to meet the stringent requirements of emerging applications like cloud gaming, eXtended Reality (XR), and video streaming services, which require high throughput, low latency, and high reliability. To address these challenges, Coordinated Spatial Reuse (C-SR) can potentially contribute to optimizing spectrum resource utilization. This mechanism is expected to enable a higher number of simultaneous transmissions, thereby boosting spectral efficiency in dense environments and increasing the overall network performance. In this paper, we focus on the performance analysis of C-SR in Wi-Fi 8 networks. In particular, we consider an implementation of C-SR where channel access and inter-Access Point (AP) communication are performed over-the-air using the Distributed Coordination Function (DCF). For such a purpose, we leverage the well-known Bianchi's throughput model and extend it to support multi-AP transmissions via C-SR. Numerical results in a WLAN network that consists of four APs show C-SR throughput gains ranging from 54% to 280% depending on the inter-AP distance and the position of the stations in the area.

翻译：IEEE 802.11 网络持续演进，以满足云游戏、扩展现实（XR）和视频流服务等新兴应用对高吞吐量、低延迟和高可靠性的严格要求。为应对这些挑战，协调空间复用（C-SR）有望为优化频谱资源利用率做出贡献。该机制预计能够支持更多数量的并发传输，从而提升密集环境下的频谱效率并提高整体网络性能。本文聚焦于 C-SR 在 Wi-Fi 8 网络中的性能分析。具体而言，我们考虑一种 C-SR 实现方案，其中信道接入和接入点（AP）间通信均通过空中接口使用分布式协调功能（DCF）完成。为此，我们利用著名的 Bianchi 吞吐量模型，并将其扩展以支持通过 C-SR 进行的多 AP 传输。在一个由四个 AP 组成的 WLAN 网络中的数值结果表明，C-SR 的吞吐量增益在 54% 到 280% 之间，具体取决于 AP 间距离以及区域内站点的位置。