AirLive Air3G - Manual (Page 87)

8 WDS Bridge Mode
AirLive Air3G User’s Manual 80
„ Channel Width: You can choose 20MHz or 20/40MHz channel width. Choose
20MHz for compliance with laws in some countries. 40MHz offers faster performance
than 20MHz
„ Guard Interval: Guard interval is placed at the beginning of each transmission. It is
used to reduce the interference effect of multi-path transmissions. The use of long
Guard Interval may perform better in interference or multipath environment. However,
it can reduce the performance.
„ MCS (Modulation and Code Scheme): MCS level for the 11n mode. It is
recommended to leave it at Auto.
„ Decline BA Request: Enable this option to decline the Block ACK requests by other
devices.
„ BG Protection: The 802.11g standard includes a protection mechanism to ensure
mixed 802.11b and 802.11g operation. If there is no such kind of mechanism exists,
the two kinds of standards may mutually interfere and decrease network’s
performance..
„ Beacon Interval: The device broadcasts beacon frames regularly to announce its
existence. The beacon Interval specifies how often beacon frames are transmitted in
time unit of milliseconds. The default value is 100, and a valid value should be between
1 and 65,535.
„ Fragmentation: When the size of a unicast frame exceeds the fragmentation
threshold, it will be fragmented before the transmission. It should have a value of
256-2346 bytes, with a default of 2346. If you experience a high packet error rate,
you should slightly decrease the Fragmentation Threshold.
„ RTS Threshold: RTS/CTS frames are used to gain control of the medium for
transmission. Any unicast (data or control) frames larger than specified RTS threshold
must be transmitted following the RTS/CTS handshake exchange mechanism. The
RTS threshold should have a value between 256-2347 bytes, with a default of 2347. It
is recommended that this value does not deviate from the default too much.
„ Short Preamble: A preamble is a signal used in wireless environment to synchronize
the transmitting timing including Synchronization and Start frame delimiter. In a "noisy"
network environment, the Preamble Type should be set to Long Preamble. The Short
Preamble is intended for applications where minimum overhead and maximum
performance is desired. If in a "noisy" network environment, the performance will be
decreased.
„ Tx Burst and Packet Aggregate: These are the scheme used for improving the