Wi-Fi 8 (802.11bn), known as Ultra High Reliability (UHR) is the next protocol in a wireless networking with innovations such as multi-access point coordination, seamless roaming, and edge performance optimization. This next standard is designed around reliability, and low-latency for critical applications in enterprises, industrial automation and robotics, homes, and large public venues to enhance high-density connectivity in congetsed mobile environments.
The key features of Wi-Fi 8:
Single Mobility Domain (SMD) enables seamless roaming accross multiple access points. Devices always connected as they move between access points without interruptions or packet drops. The security context is shared accross all the APs in the domain which eliminates the re-authentication.
Multi-AP coordination with smart AP collaboration in high-density environments to lower latency, increase efficiency and therfore enhance user experience.
Enhanced Long Range (ELR) enables reliable connection at the edge that enhances performance and maintains reliable connection at the farther boundaries of the AP coverage without interference.
Improved coexistence in-device radios (Wi-Fi, Bluetooth, UWB) when they share the same antennas or spectrum.
Ultra low latency and wired-grade stability which is critical in real-time applications, VR and streaming.
Home connectivity, automation, and real-time monitoring in high-density multi-dwelling units (MDUs) with interference mitigation and smarter spectrum coordination.
Large venue spaces with enhanced seamless mobility for AR, video sharing, real-time translation, surveillance, sensors, and real-time tracking in high-density environments (stadiums, airports, and schools).
Unequal Modulation (UEQM), each spatial stream assigns a modulation level based on a signal quality to improve throughput.
Distributed-Tone Resource Units (DRU) scatters tones accross the wireless spectrum which enables devices to maximize their transmit power.
Non-Primary Channel Access (NPCA), the AP uses sub-channels when the primary channel is busy.
Coordinated Spatial Reuse (Co-SR) allows access points to coordinate transmissions and power levels in a way which they can share the same channel without interference.
Coordinated Beamforming (Co-BF) allows multiple access points to focus their RF energy on one device which reduces inter-AP interference.
Dynamic Sub-band Operation (DSO) enables access points with a wide channel to share slices of their bandwidth with devices in need, therefore the available spectrum gets utilized more efficiently.
Dynamic Bandwidth Expansion (DBE), the AP can temporarily expand its bandwidth when there is an available adjacent spectrum.
Coordinated Time Division Multiple Access (Co-TDMA), an AP gets exclusive use of the channel then the TXOP owner can pool neighbors to share part of its TXOP with one AP at the time (a sequential sharing).
Bounded ESS, the AP tell its clients which channels to scan, which improves roaming speeds, and prolongs a batter life in the mobile devices.
New MCS rates (17, 19, 20, and 23) for UHR to make the performance smoother with better rate adaptaion.
Dynamic Power Save (DPS), the STA doesn't go to sleep; instead, it lowers its capability until the AP triggers high capability mode to utilize full performance.