|[January 07, 2014]
New IEEE 802.11ac™ Specification Driven by Evolving Market Need for Higher, Multi-User Throughput in Wireless LANs
LAS VEGAS --(Business Wire)--
IEEE (News - Alert), the world's largest professional organization dedicated to
advancing technology for humanity, today announced approval of IEEE
802.11ac™-2013,1 which is intended to achieve higher
multi-user throughput in wireless local area networks (WLANs). The new
amendment is intended to improve WLAN user experience by providing data
rates up to 7 Gbps in the 5 GHz band, more than 10 times the speed that
was previously standardized.
"As wireless networks become more widely deployed, users are able to
transition applications from fixed links to the convenience, freedom and
versatility of wireless links," said Bruce Kraemer, chair of the IEEE
802.11™ working group. "These transitions create an evolutionary demand
to enhance the capacity of wireless networks in order to support the
increasing number of users, as well as new classes of applications with
higher bandwidth requirements. Moreover, as WLAN usage of shared
spectrum grows, the wireless access mechanisms need to be improved to
achieve higher multi-user throughput. IEEE 802.11ac is intended to meet
these evolving needs for higher data rates and to help enable new
generations of data-intensive wireless applications."
The IEEE 802.11ac specification adds channel bandwidths of 80 MHz and
160 MHz with both contiguous and non-contiguous 160 MHz channels for
flexible channel assignment. It adds higher order modulation in the form
of 256 quadrature amplitude modulation (QAM), providing an additional
33-percent improvement in data rate. A further doubling of the data rate
is achieved by increasing the maximum number of spatial streams to eight.
The IEEE 802.11ac amendment introduces a revolutionary new technology to
support multiple concurrent downlink transmissions, referred to as
"multi-user multiple-input, multiple-output" (MU MIMO). By using smart
antenna technology, MU MIMO enables more efficient spectrum use, higher
system capacity and reduced latency by supporting up to four
simultaneous user transmissions. This is particularly useful for client
devices with a limited number of antennas, such as smartphones and
The IEEE 802.11ac amendment streamlines the existing transmit
beamforming mechanisms and is increasing the adoption of the technology
across devices. Transmit beamforming is a valuable technology that
significantly improves coverage, reliability and data rate performance.
More than 300 individuals from equipment and silicon suppliers, service
providers, systems integrators, consultant organizations and academic
institutions from more than 20 countries participated in IEEE 802.11ac's
The IEEE 802.11ac standards document is available for purchase at the IEEE
IEEE 802.112 defines the technology for the world's premier
WLAN products. IEEE 802.11-based products are often branded as "Wi-Fi®"
in the market. IEEE 802.11 standards underpin wireless networking
applications around the world, such as wireless access to the Internet
from offices, homes, airports, hotels, restaurants, trains and aircraft.
IEEE 802.11's relevance continues to expand with the emergence of new
applications, such as the smart grid, wireless docking and the "Internet
of Things." For more information about the IEEE 802.11 working group,
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About the IEEE Standards Association
The IEEE Standards Association, a globally recognized standards-setting
body within IEEE, develops consensus standards through an open process
that engages industry and brings together a broad stakeholder community.
IEEE standards set specifications and best practices based on current
scientific and technological knowledge. The IEEE-SA has a portfolio of
over 900 active standards and more than 500 standards under development.
For more information visit http://standards.ieee.org/.
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to advancing technology for the benefit of humanity. Through its highly
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1 IEEE 802.11ac™-2013 "Standard for IT - Telecommunications
and Information Exchange Between Systems - LAN/MAN - Specific
Requirements - Part 11: Wireless LAN Medium Access Control and Physical
Layer Specifications - Amd 4: Enhancements for Very High Throughput for
operation in bands below 6GHz"
2 IEEE 802.11™-2012 "Standard for Information
technology--Telecommunications and information exchange between systems
Local and metropolitan area networks--Specific requirements Part 11:
Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)
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