1. Upcoming new Wi-Fi technologies
IEEE802.11ac
Upcoming new Wi-Fi technologies

2. Speed competition
IEEE802.11n
LTE
( Long Term Evolution )
Wi-Fi

3. IEEE n
600 Mbps
IEEE ac
600Mbps

4. Three factors
for increasing speed
1. Bandwidth
2. MIMO Stream
3. QAM

5. Three factors Bandwidth
Note 1. There are 108 sub-carriers in 40MHz and 468 sub-carriers in 160MHz, so, 468/108 = 4.35

6. MIMO
Innovative technology

7. Stream support Main device: only support 3 streams
Standard PCs: only support up to 2 streams
Smartphones: only support 1 stream

8. Three factors MIMO Stream
If there is a device that supports 2 streams, up to 4 devices can be used at the same time with one AP.

9. Three factors
QAM
Note QAM is 8bit per symbol, 64QAM is 6bit per symbol, so, 8/6 = 1.33

10. Power saving technology
of devices has been improved

11. Power saving technology
Existing technology
New technology

12. Standardization
IEEE and Wi-Fi Alliance (WFA)

13. Wider bandwidth

14. Advantage of IEEE802.11ac Boast a 6.9Gbps maximum transmission speed
2. Support MU-MIMO
3. Improved power saving

15. Thank You