TRENDnet 12dBi User Manual page 64

TRENDnet User's Guide
A DTIM interval is a count of the number of beacon frames that must occur before
the access point sends the buffered multicast frames. For instance, if DTIM Interval
is set to 3, then the Wi-Fi clients will expect to receive a multicast frame after
receiving three Beacon frame. The higher DTIM interval will help power saving and
possibly decrease wireless throughput in multicast applications.
Fragment Threshold : The Fragment Threshold is in the range of 256~2346 byte.
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The default is 2346 byte.
Each Wi-Fi packet can be divided into smaller packets, marked with a sequential
fragment number and re-assemble in the receiving ends. The purpose is to make a
short frame, instead of long frame, transmitting by radio in a heavy noisy
environment. Because of sending smaller frames, corruptions are much less likely
to occur. The pros is obvious, the cons is the overhead for transmission. So, in a
clean environment, higher fragment threshold can be an option to increase
throughput.
Fragmentation will be triggered by setting the Fragment Threshold, usually in Byte-
length. Only when the frame size is over the Threshold, fragmentation will take
place automatically.
RTS Threshold : TRTS Threshold is in the range of 1~2347 byte. The default is 2347
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byte.
The main purpose of enabling RTS by changing RTS threshold is to reduce possible
Data
Queue Transmitted Priority
Clients to AP
AC_BK Background. Low
AC_BE Best Effort Medium
AC_VI Video High
AC_VO Voice High
collisions due to hidden wireless clients. RTS in AP will be enabled automatically if
the packet size is larger than the Threshold value. By default, RTS is disabled in a
normal environment supports non-jumbo frames.
Short Preamble : By default, it's "Enable". To Disable is to use Long 128-bit
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Description
High throughput. Bulk data that requires
maximum throughput and is not time-sensitive
is sent to this queue (FTP data, for example).
Medium throughput and delay. Most traditional
IP data is sent to this queue
Minimum delay. Time-sensitive video data is
automatically sent to this queue
Time-sensitive data like VoIP and streaming
media are automatically sent to this queue
Preamble Synchronization field.
The preamble is used to signal "here is a train of data coming" to the receiver. The
short preamble provides 72-bit Synchronization field to improve WLAN
transmission efficiency with less overhead.
Tx Burst : By default, it's "Enable". To Disable is to deactivate Tx Burst.
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With TX burst enabled, AP will send many packets in a burst, without collision detection
and RTS/CTS for each packet. TX Burst have better throughput but cause interference
with other APs in channel.
Pkt_Aggregate : By default, it's "Enable"
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Increase efficiency by aggregating multiple packets of application data into a single
transmission frame. In this way, 802.11n networks can send multiple data packets
with the fixed overhead cost of just a single frame.
WMM : By default, it's "Disable". To Enable is to use WMM and the WMM

parameters should appears.
WMM Parameters of Access Point : This affects traffic flowing from the access
point to the client station
Configuring QoS options consists of setting parameters on existing queues for
different types of wireless traffic. You can configure different minimum and
maximum wait times for the transmission of packets in each queue based on
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