Edimax Technology EW-7722In - Manual (Page 87)

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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 point will establish connection by
themselves. There are two types of WPS: PBC (Push-Button
Configuration) and PIN code.