Specifications

Chapter 4 - Operation Menus and Parameters
BreezeNET B 158 System Manual
4.2.6.5.10.1 Adaptive Modulation Option
This submenu allows users to enable/disable the Adaptive Modulation Algorithm.
The default selection is Enable.
4.2.6.5.10.2 Adaptive Modulation Algorithm In Use
This submenu allows users to choose between the basic Adaptive Modulation
algorithm and the Statistics-Based Rate Control algorithm.
 Adaptive Modulation: The decisions made by the Adaptive Modulation
algorithm for the modulation level to be used are based on multiple
parameters, including information on received signal quality (SNR) that is
received periodically from the destination unit, the time that has passed since
the last transmission to the relevant unit, and the recent history of successful
and unsuccessful transmissions/retransmissions.
The transmission/retransmission mechanism operates as follows:
1 Each new frame (first transmission attempt) will be transmitted at a
modulation level selected by the Adaptive Modulation algorithm.
2 If the first transmission trial fails, the frame will be retransmitted at the
same modulation level up to the maximum number of retransmission
attempts defined by the Number of HW Retries parameter.
 Statistics-Based Rate Control: When enabled, the Statistics-Based Rate
Control decision algorithm supports decrease/increase of transmission's
modulation levels between the lowest possible level to the value configured for
the Maximum Modulation Level parameter. If the Maximum Modulation Level
is set at the lowest possible level, the Adaptive Modulation algorithm has no
effect.
In general, the Statistics-Based Rate Control algorithm provides an overall better
performance in case of interference and a decrease in the retransmissions’
percentage over the original Adaptive Modulation algorithm.
4.2.6.5.10.3 Statistics-Based Rate Control Parameters
This submenu configures parameters for the Statistics-Based Rate Control
algorithm. When enabled, the Statistics-Based Rate Control algorithm, constantly
NOTE
Statistics-Based Rate Control is only supported in units with HW Revision C or higher.