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

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

IEEE 802.11 n 600 Mbps IEEE 802.11 ac 600Mbps

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

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

MIMO Innovative technology

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

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.

Three factors QAM Note 2. 256QAM is 8bit per symbol, 64QAM is 6bit per symbol, so, 8/6 = 1.33

Power saving technology of devices has been improved

Power saving technology Existing technology New technology

Standardization IEEE and Wi-Fi Alliance (WFA)

Wider bandwidth

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

Thank You