Every Wi-Fi generation to date has been defined by its peak data rate. Wi-Fi 7 (IEEE 802.11be) raised that figure to 46 Gbps with 320 MHz channels, 4096-QAM, and up to 16 spatial streams. Wi-Fi 8 (IEEE 802.11bn) leaves the peak rate unchanged. The amendment focuses on reliability instead, which is where its name, Ultra High Reliability (UHR), comes from: the targets are lower latency, less packet loss, and stable throughput under load rather than a higher headline number. This lecture examines that change in direction and what it means for the design and testing of Wi-Fi devices.
The lecture opens with the mechanisms that distinguish Wi-Fi 7 from earlier generations: 320 MHz channels, 4096-QAM, Multi-Link Operation, Multi-Resource Unit (MRU) allocation, preamble puncturing, and Automated Frequency Coordination (AFC) in the 6 GHz band. Each is presented as a response to a specific limitation of previous generations, along with its hardware and protocol complexity cost. The second part turns to Wi-Fi 8, where multi-AP coordination, coordinated spatial reuse, Unequal Modulation (UEQM), non-primary channel access, and enhanced long-range operation address interference, contention, and edge-of-coverage loss rather than raw bandwidth. Particular attention is given to why coordination between access points, rather than a wider channel, became the central idea of the new standard.
The final section looks at how these features are deployed in a real product and what they mean for the device manufacturer. Each one adds complexity on the manufacturer's side: in the chipset and the RF front end, in meeting regulatory limits such as the 6 GHz power rules, and in the measurements service providers run during acceptance testing. The lecture concludes with a short list of open problems suited to research directions and the skills that matter most for engineers entering the wireless field.
Speaker(s): Dr. Samet Yıldız,
Room: VEC 424, Bldg: Vivian Engineering Center (VEC), 1331 Palo Verde Ave, Long Beach, California, United States, 90815, Virtual: https://events.vtools.ieee.org/m/575150
