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TRENDnet User's Guide
• TxStream/Rx Stream: Select the amount of transmit (TX) and Receive (RX) streams.
By default, it's 2.
• Channel Bandwidth: The "20/40" MHz option is usually best. The other option is
available for special circumstances.
• Extensions Channel: Select which section of channels to use for extension channels.
• MCS: This parameter represents transmission rate. By default (Auto) the fastest
possible transmission rate will be selected. You have the option of selecting the
speed if necessary. (Refer to Appendix C. MCS Data Rate)
Wireless Advanced Setup
To achieve optimal wireless performance, it is necessary to tweak advance setting per
requirements properly, not necessary higher the better or lower.
The administrator can change the RTS threshold and fragmentation threshold settings
for the system. Please click on Wireless -> Advanced Setup and follow the below setting.
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Short Slot : By default, it's "Enable" for reducing the slot time from the standard 20
•
microseconds to the 9 microsecond short slot time. Slot time is the amount of time a
device waits after a collision before retransmitting a packet. Reducing the slot time
decreases the overall back-off, which increases throughput. Back-off, which is a
multiple of the slot time, is the random length of time a station waits before
sending a packet on the LAN. For a sender and receiver own right of the channel the
shorter slot time help manage shorter wait time to re-transmit from collision
because of hidden wireless clients or other causes. When collision sources can be
removed sooner and other senders attempting to send are listening the
channel(CSMA/CA) the owner of the channel should continue ownership and finish
their transmission and release the channel. Then, following ownership of the
channel will be sooner for the new pair due to shorter slot time. However, when
long duration of existing collision sources and shorter slot time exist the owners
might experience subsequent collisions. When adjustment to longer slot time can't
improve performance then RTS/CTS could supplement and help improve
performance.
ACK Timeout: ACK timeout is in the range of 1~255 and set in unit of microsecond.
•
The default value is 32 microsecond. All data transmission in 802.11b/g request an
"Acknowledgement" (ACK) send by receiving radio. The transmitter will resend the
original packet if correspondent ACK failed to arrive within specific time interval,
also refer to as "ACK Timeout".
ACK Timeout is adjustable due to the fact that distance between two radio links
may vary in different deployment. ACK Timeout makes significant influence in
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