Controller Based WLANs

How does 802.11ac achieve 6.9Gbps?

Aruba Employee
Question   What are the components of 802.11ac that help in achieving 6.9 Gbps of throughput.

 

With 802.11n, 600Mbps can be achieved with 4 spatial streams.
For 802.11ac, the important contributing factors are:

  1. 256 QAM – Provides 33.37% increase in throughput
  2. 160 MHz – Multiples the existing capacity in 20MHz channel by 9 times
  3. 8 Spatial Streams – Multiplies the throughput by 8 times

Maximum data rate achieved by 802.11n with MCS 7, 1 Spatial Stream and 20 MHz is 72.2Mbps.

So improvement provided by 11ac is:
72.2 * 1.3337 * 9 * 8 = 6933 Mbps (Max with 160 MHz and 8 SS)

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Version history
Revision #:
2 of 2
Last update:
‎06-24-2014 08:29 AM
 
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