Product Info

Infinet Wireless: Technical Documentation – InfiMAN Evolution
Operation & Administration – 104
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Turbo
(Master)
Increase the throughput in case of link degradation due to errors in
the radio. The sliding window of the ARQ algorithm are extended from
three to five frames, which increases its efficiency.
DL/ULratio (%)
(Master)
Set the DL percentage of the time slot
The range is from 20 to 80% in increments of 1%
The empty field enables the mode of flexible DL/UL ratio
adjustment depending on traffic load
Real accepted values depend on the used bandwidth, the frame size
and the used modulations. To determine the established value
acceptability it is necessary to control parameters (Tx Time Limit/Rx
Time Limit) in radio interface statistics. Any of these parameters shall
not be less than zero. In the PtMP system with a large number of
clients, the ratio of real throughput in this or other way does not
match the established DL/UL value. Uplink performance will always
be less, because of big overheads of the uplink traffic servicing. In
case of a large number of clients value more than 65% practically do
not lead to throughput increase in Downlink. Rated speed in Uplink
and Downlink (Rx Cap/Tx Cap) is reached only in case of sector full
and balanced load by all clients
MaxDistance (Km)
(Master)
Set the maximum operational distance (in kilometers)
Has an impact on guard intervals duration
The range is from 1 to 100 km in increments of 1 km
It allows the system to calculate signal propagation time to the
furthest subscriber and value of the guard interval between
transmission and receiving phases. It is recommended to set 3-5 km
more than really measured distance. In case of LOS condition
violation or with a large number of reflections larger value as 10-20
km can be required
STARSSI (dBm)
(Master)
Set the target power of received radio signal from Slave node at the
input of Master node
The range is from -90 to -20 dBm in increments of 1
It allows to reduce the radiation influence from the subscriber units to
the neighbor sector due to insufficient suppression of the antenna
pattern back lobe
To achieve maximum TDMA network performance it is important to
obtain the highest possible signal level and modulation (bitrates), so
transmitter power reducing is a necessary measure. If possible, it is
better to try to reduce the impact of clients on neighbor sector (and
vice versa), organizational measures (shielding, antennas diversity,
etc.)