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IEEE 802.11ac is a wireless computer networking standard in the 802.11 family (which is marketed under the brand name Wi-Fi), developed in the IEEE Standards Association process, providing high-throughput wireless local area networks (WLANs) on the 5 GHz band. The standard was developed from 2011 through 2013, with final 802.11 Working Group approval and publication scheduled for early 2014. According to a study, devices with the 802.11ac specification are expected to be common by 2015 with an estimated one billion spread around the world.
This specification has expected multi-station WLAN throughput of at least 1 gigabit per second and a single link throughput of at least 500 megabits per second (500 Mbit/s). This is accomplished by extending the air interface concepts embraced by 802.11n: wider RF bandwidth (up to 160 MHz), more MIMO spatial streams (up to 8), multi-user MIMO, and high-density modulation (up to 256-QAM).
The single-link and multi-station enhancements supported by 802.11ac enable several new WLAN usage scenarios, such as simultaneous streaming of HD video to multiple clients throughout the home, rapid synchronization and backup of large data files, wireless display, large campus/auditorium deployments, and manufacturing floor automation.
All rates assume 256-QAM, rate 5/6:
|PHY Link Rate||Aggregate|
|1-antenna AP, 1-antenna STA, 80 MHz||Handheld||433 Mbit/s||433 Mbit/s|
|2-antenna AP, 2-antenna STA, 80 MHz||Tablet, Laptop||867 Mbit/s||867 Mbit/s|
|1-antenna AP, 1-antenna STA, 160 MHz||Handheld||867 Mbit/s||867 Mbit/s|
|2-antenna AP, 2-antenna STA, 160 MHz||Tablet, Laptop||1.69 Gbit/s||1.69 Gbit/s|
|4-antenna AP, four 1-antenna STAs, 160 MHz|
|Handheld||867 Mbit/s to each STA||3.39 Gbit/s|
|8-antenna AP, 160 MHz (MU-MIMO)|
-- one 4-antenna STA
-- one 2-antenna STA
-- two 1-antenna STAs
|Digital TV, Set-top Box,|
Tablet, Laptop, PC, Handheld
|3.39 Gbit/s to 4-antenna STA|
1.69 Gbit/s to 2-antenna STA
867 Mbit/s to each 1-antenna STA
|8-antenna AP, four 2-antenna STAs, 160 MHz|
|Digital TV, Tablet, Laptop, PC||1.69 Gbit/s to each STA||6.77 Gbit/s|
|Theoretical throughput for single Spatial Stream (in Mb/s)|
|20 MHz channels||40 MHz channels||80 MHz channels||160 MHz channels|
|800 ns GI||400 ns GI||800 ns GI||400 ns GI||800 ns GI||400 ns GI||800 ns GI||400 ns GI|
Note: A second stream doubles the theoretical data rate, a 3rd 3x, etc.
Quantenna released the first 802.11ac chipset for retail Wi-Fi routers and consumer electronics on November 15, 2011. Redpine Signals released the first low power 802.11ac technology for smartphone application processors on December 14, 2011. On January 5, 2012, Broadcom announced its first 802.11ac Wi-Fi chips and partners and on April 27, 2012, Netgear announced the first Broadcom-enabled router. On May 14, 2012, Buffalo Technology released the world’s first 802.11ac products to market, releasing a wireless router and client bridge adapter.
On June 7, 2012, it was reported that ASUS had unveiled its ROG G75VX gaming notebook, which will be the first consumer-oriented notebook to be fully compliant with 802.11ac (albeit in its "draft 2.0" version).
The Samsung Galaxy Round, announced on October 09, 2013, also use the 802.11ac-enabled handset.
|Intel||7260 AC||2||?||?||Laptops, Desktops|
|MediaTek||MT7610||1||?||?||?||PC (PCIe or USB)|
|MediaTek||MT7612E||2||Laptops (PCIe 2.0)|
|MediaTek||MT7612U||2||Laptops (USB 3.0)|