The Wi-Fi Usage Scenario is Rapidly Changing
The key metric to measure Wi-Fi performance is moving away from simplistic theoretical peak speeds to overall capacity in tomorrow's Wi-Fi networks.
Traditional
Theoretical speed for
single AP and few devices
New
Overall capacity for
dense usage scenarios
802.11ax
The new 802.11ax technology builds upon real-world deployment of 802.11ac. As the next-generation Wi-Fi, 802.11ax is no longer just about speeds but also about stronger, steadier, and more efficient wireless connections.
The Improved Features of 802.11ax
Greater Capacity
Enhanced MU-MIMO increases capacity up to 4x
802.11ax access points with 8x8 MU-MIMO in Uplink and downlink increase 4x in median throughputs in dense scenarios compared to traditional MU-MIMO
Higher Efficiency
OFDMA schedules to reduce payload and latency
802.11ax adopts OFDMA to allows multiple users with varying bandwidth needs to be served simultaneously. It results in fixed overhead payload size, reduced latency, and increased efficiency.
Improved Performance
1024 QAM results in a 25% increase in data rates
802.11ax comes with a higher modulation scheme of 1024 QAM, which translates to better throughput and 25% higher capacity than traditional modulation scheme.
Higher Efficiency
BSS Coloring reduces wait times and interference
802.11ax features BSS coloring which tags packets with a “color” to differentiate between adjacent basic service sets to reduce waiting time and lessen contention. If they have the same color, this is called an intra-BSS frame transmission.Without BSS coloring, only one radio can transmit at a time, and if clients “hear” transmissions from other clients, they defer transmission; which, results in co-channel interference.
Higher Efficiency
Target wake time saves the battery life of devices
The target wake time feature lets your devices to keep a radio receiver sleeping and wake it up as needed to receive periodic transmissions from an access point. The result is significant power-saving for battery-powered devices.
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