One of the top objectives of 802.11ax, according to Ennis, is to quadruple wireless speed to individual network clients—not just to increase the speed of the network overall. The Chinese manufacturer Huawei, which has engineers in the IEEE 802.11ax working group, has already reported Wi-Fi connection speeds up to 10.53Gbps on the 5GHz frequency band.

Ennis said the 802.11ax standard will improve Wi-Fi performance in environments with high numbers of users, such as hotspots in public venues. This will be accomplished by using the available spectrum more efficiently, doing a better job of managing interference, and making enhancements to underlying protocols such as medium access control (MAC) data communication. This should make public Wi-Fi hotspots faster and more reliable.

The 802.11ax standard will also use orthogonal frequency-division multiple access (OFDMA) to boost the amount of data the router can transmit. Like OFDM (orthogonal frequency-division multiplexing), OFDMA encodes data on multiple sub-carrier frequencies—essentially packing more data into the same amount of air space. The “multiple access” in OFDMA describes a means of assigning subsets of those sub-carrier frequencies to individual users.

http://www.pcworld.com/article/2366929/what-s-next-for-wi-fi-a-second-wave-of-802-11ac-devices-and-then-802-11ax.html

(http://www.autoadmit.com/thread.php?thread_id=2612418&forum_id=2#25884972)