Performance Parameters (Au And Su) - Alvarion BreezeACCESS II System Manual

Menus and Parameters
Performance Parameters (AU and
SU)
The Performance Parameters menu includes the following parameters:
RTS Threshold – Defines the minimal frame size to require
RTS/CTS (Request To Send/Clear To Send) handshake. Frames
with a size below the RTS Threshold value are transmitted directly
to the wireless link without being preceded with RTS frames. Setting
this parameter to a value larger than the maximum frame size will
prevent the RTS/CTS handshake for frames transmitted by this
unit.
The allowed range is from 20 to 1600.
The default value is 60 bytes for SUs and 1600 for AUs. Using a
value of 1600 for the AU ensures that it will never use the RTS/CTS
mechanism.
Number of Retransmissions – The maximum number of times that
a packet that was not acknowledged will be retransmitted. This
parameter is not applicable when the ACSE Option is enabled.
Valid values are from 0 (no retransmissions) to 100.
The default value is 1.
Number of Dwells to Retransmit – The minimum number of dwell
periods during which packets will be retransmitted. The Number of
Dwells to Retransmit parameter is used together with the Number
of Retransmissions parameter (see above) to spread the
retransmissions in both the time and frequency domains.
Valid values are from 0 to 9.
The default value is 2.
NOTE:
The Number of Dwells to Retransmit is not applicable to ACSE voice frames since
voice is sensitive to delay. All ACSE voice frames will be retransmitted within the same
dwell, up to the maximum number of retransmissions allowed as defined by the ACSE
Number Of Retransmissions For Voice parameter.
Number of Retransmissions to Decrease Rate – The number of
unsuccessful retransmissions that will cause an automatic decrease
in the data rate before the next retransmission (the lower the data
rate, the higher the probability that the packet will be properly
received and acknowledged). The count is reset each time the rate is
reduced, meaning that at each rate the maximum number of
transmission attempts equals the value of this parameter plus 1.
Valid values are from 0 to 10.
The default value is 0, meaning that the rate will be decreased
immediately following an unsuccessful transmission attempt at the
current rate.
BreezeACCESS Version 4.3 System Manual
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