A Tutorial on IEEE 802.11bn Multi-AP Coordination for Wi-Fi 8: From Standardization to Performance Evaluation

The IEEE 802.11bn amendment introduces Ultra High Reliability (UHR) targets for Wireless Local Area Networks (WLANs), aiming to substantially improve upon prior standards. Relative to Extremely High Throughput (EHT) operations defined in the 802.11be amendment, 802.11bn targets at least a 25% increase in throughput, a 25% reduction in the 95th percentile of the latency distribution, and a 25% decrease in MAC Protocol Data Unit (MPDU) loss. A central innovation enabling these goals is Multi-Access Point Coordination (MAPC), an unprecedented capability whereby access points (APs) coordinate among themselves to enhance spectrum utilization and advance reliability. This paper provides a comprehensive overview and analysis of the MAPC framework. It begins by reviewing AP coordination solutions that predate 802.11bn, which form the foundation for the current framework. It then describes the technical 802.11bn MAPC framework as defined by the task group, offers a detailed overview of each candidate MAPC feature contextualized with the relevant state of the art, introduces Kom8ndor—an open-source Wi-Fi 8 simulation tool—to evaluate candidate MAPC features and showcase their potential to achieve UHR goals, and finally outlines the future of MAPC beyond 802.11bn, exploring promising directions such as coordination schemes beyond 802.11bn (e.g., Joint Transmission (JT)) and new ideas.

The tutorial follows a structured methodology that combines standardization review, feature analysis, and simulation-based evaluation. First, it surveys existing AP coordination solutions that precede the 802.11bn standard, establishing the baseline and motivating the transition to the current framework. Second, it describes the technical 802.11bn MAPC framework as defined by the task group, detailing the architecture and operational principles. Third, it provides a detailed overview of each candidate MAPC feature, contextualizing each with the relevant state of the art. Fourth, it introduces Kom8ndor, an open-source Wi-Fi 8 simulation tool, and uses it to evaluate the candidate MAPC features and demonstrate their potential to achieve UHR goals. Finally, it outlines future directions for MAPC beyond 802.11bn, including coordination schemes such as Joint Transmission (JT) and other new ideas. This methodology ensures that the analysis is grounded in both standardization context and quantitative performance evaluation.