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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.
15. What is 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.
16. What is 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.
17. What is 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.
18. What is 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