H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 369)

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5. Configure the radio as described in Table 114 .
6. Click Apply.
Table 114 Configuration items
Item Description
Preamble
Preamble is a pattern of bits at the beginning of a frame so that the receiver
can sync up and be ready for the real data.
• Short preamble—A short preamble improves network performance.
Therefore, this option is always selected.
• Long preamble—A long preamble ensures compatibility between access
point and some legacy client devices. Therefore, you can select this option
to make legacy client devices support short preamble.
802.11a/802.11n (5 GHz) do not support this configuration.
Transmit Distance Maximum coverage of a radio.
ANI
Adaptive Noise Immunity (ANI). After the ANI function is enabled, the device
automatically adjusts the noise immunity level according to the surrounding
signal environment to eliminate RF interference.
• Enable—Enable ANI.
• Disable—Disable ANI.
Client Max Count Maximum number of clients that can be associated with one radio.
Fragment Threshold
Specify the maximum length of frames that can be transmitted without
fragmentation. When the length of a frame exceeds the specified fragment
threshold value, it is fragmented.
• In a wireless network where error rate is high, you can decrease the
fragment threshold by a rational value. In this way, when a fragment of a
frame is not received, only this fragment rather than the whole frame needs
to be retransmitted, and thus the throughput of the wireless network is
improved.
• In a wireless network where no collision occurs, you can increase the
fragment threshold by a rational value to decrease acknowledgement
packets and thus increase network throughput.
Beacon Interval
Interval for sending beacon frames. Beacon frames are transmitted at a regular
interval to allow mobile clients to join the network. Beacon frames are used for
a client to identify nearby APs or network control devices.