Dahua 5.8GHz Wireless AP/CPE User Manual
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4. TDMA
Currently, most long-distance wireless broadband network bridge products developed from 802.11
WLAN technologies. The built-in operation system integrated TDMA
，
5M/10M/20M/40MHz bandwidth
flexible configuration, rate control, ACK timeout auto adjustment and several other industry-leading
technology, which is an ideal product of long-distance wireless broadband access. Among those, TDMA
effectively solved the problem of hidden node which bothers large-scale point-to-multipoint WLAN.
5M/10M/20M/40MHz bandwidth flexible configuration achieved a balance between scarce wireless
bandwidth resource and complex working scenario: narrower wireless bandwidth configuration is used in
the situation where there are less free wireless channels and a single user wireless access rate
requirement is not high; wider wireless bandwidth configuration is used under the situation where there
are more free wireless channels and single user wireless access rate requirement is high. Besides the
narrower wireless bandwidth configuration is more effective in the environment with block. Operation
system adopts advanced rate control algorithm which can quickly adapt to channel quality change and at
the same time keep the rate stable as much as possible, which is very suitable for long-distance wireless
transmission. ACK timeout auto adjustment technology can auto detect the distance between access
point and client; adjust wireless parameter to optimize the device performance. See Figure 12 for client
TDMA.
Figure 12
When you enable TDMA function, AP end needs to enable TDMA, client needs to set a priority. Different
clients ask for different demand for bandwidth when one AP links to several clients, but the setting of
priority is done according to clients
’ demand of bandwidth for current device. We recommend users to
set priority as high if the demand for bandwidth id high, otherwise, priority should be set as low priority.
Anyway, all the clients
’ priority can be set same if they have the same demand for bandwidth.
