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WMM
Wi-Fi Multimedia (WMM), a group of features for wireless networks that improve the user
experience for audio, video and voice applications. WMM is based on a subset of the IEEE
802.11e WLAN QoS draft standard. WMM adds prioritized capabilities to Wi-Fi networks
and optimizes their performance when multiple concurring applications, each with different
latency and throughput requirements, compete for network resources. By using WMM,
end-user satisfaction is maintained in a wider variety of environments and traffic conditions.
WMM makes it possible for home network users and enterprise network managers to decide
which data streams are most important and assign them a higher traffic priority.
WMM Power Save
WMM Power Save is a set of features for Wi-Fi networks that increase the efficiency and
flexibility of data transmission in order to conserve power. WMM Power Save has been
optimized for mobile devices running latency-sensitive applications such as voice, audio, or
video, but can benefit any Wi-Fi device. WMM Power Save uses mechanisms included in the
IEEE 802.11e standard and is an enhancement of IEEE 802.11 legacy power save. With
WMM Power Save, the same amount of data can be transmitted in a shorter time while
allowing the Wi-Fi device to remain longer in a low-power "dozing" state.
GI
GI stands for Guard Interval. It's a measure to protect wireless devices from cross-
interference. If there are two wireless devices using the same or near channel, and they are
close enough, radio interference will occur and reduce the radio resource usability.
STBC
STBC stands for Space-Time Block Coding, which is a technique used to transfer multiple
copies of data by multiple antenna, to improve data transfer performance. By using multiple
antennas, not only data transfer rate is improved, but also the wireless stability.
WPS
WPS stands for Wi-Fi Protected Setup. It provides a simple way to establish unencrypted or
encrypted connections between wireless clients and access point automatically. User can press
a software or hardware button to activate WPS function, and WPS-compatible wireless clients
and access point will establish connection by themselves. There are two types of WPS: PBC
(Push-Button Configuration) and PIN code.
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