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Chapter 4 - Operation and Administration
4.8.2.2.4.4
Uplink Fade Margin
The system uses hard-coded SNR thresholds for rate-adaptation decisions
according to the Diversity Mode. The Uplink Fade Margin is added to the uplink
thresholds, thus enabling to change the actual thresholds used by the uplink
multirate algorithm ("reducing" the sensitivity according to the radio planning).
The range is from 0 to 15 dB.
The default is 2 dB.
4.8.2.2.4.5
Downlink Multi Rate Support
Defines whether the multi rate algorithm will be used in the downlink. Under
normal operating conditions the Downlink Multi Rate Support should always be
enabled. The option to disable it is provided primarily for testing purposes.
The default is Enable.
4.8.2.2.4.6
DL Multi Rate Type
Applicable only when Downlink Multi Rate Support is enabled. The available
options are:
DLA 1: A PER-based algorithm with thresholds resulting in a relatively aggressive
mechanism.
DLA 2: A PER-based algorithm with thresholds resulting in a less aggressive
mechanism. Typically this algorithm decreases the number of retransmissions
and improves jitter and delay performance.
The default is DLA 1.
4.8.2.2.4.7
Downlink Basic Rate
When Downlink Multi Rate Support is enabled, the Downlink Basic Rate defines
the lowest rate that can be used by the multi rate algorithm in the downlink. MSs
that cannot communicate with the BS at this rate will not be served. This can be
used to deny service to MSs with very poor link conditions, thus improving the
overall capacity.
When Downlink Multi Rate Support is disabled, this is the fixed rate at which the
BS will communicate with all MSs it can serve.
The available options are:
QPSK-CTC-1/2 REP4
QPSK-CTC-1/2 REP2
QPSK-CTC-1/2
BreezeMAX Extreme
196
BS Menu
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