User manual

Chapter 2 - Managing a Single Device/Cell Service Parameters Page
AlvariCRAFT Device Manager 123 User Manual
MIR Only Applicable only for AU. When the MIR Only Option is enabled, it
forces the MIR/CIR algorithm to use MIR values only. The MIR/CIR
algorithm determines the actual information rate for each of the
supported SUs under changing conditions of demand, based on the
configured CIR and MIR values. When the MIR Only Option is
enabled, the MIR/CIR algorithm is overridden and forced to operate
with MIR values only. For example, the AU attempts to enable all SUs
to transmit/receive information at the specified MIR value. When
enabled, the graceful degradation algorithm, which is a part of the
CIR/MIR algorithm, is also disabled.
Maximum Burst Duration
(msec)
Sets the maximum time for accumulating burst transmission rights
according to the Burst Duration algorithm.
Available values range from 0 to 2000 (milliseconds).
Graceful Degradation
Limit (%)
Applicable only for AU. Sets the limit on using the graceful
degradation algorithm. In cases of over demand, the performance of
all SUs is degraded proportionally to their CIR (IR=(100%-k%) x CIR).
The graceful degradation algorithm is used as long as k is not higher
than K, where K is the Graceful Degradation Limit. Beyond this point
the simple "brute force" algorithm is used. The Graceful Degradation
Limit should be raised in proportion to the demand in the cell. The
higher the expected demand in a cell, the higher the value of the
Graceful Degradation Limit. Higher demand can be expected in cases
of significant over-subscription and/or in deployments where a high
number of subscribers are in locations without proper communication
with the AU at the highest data rate.
The available values range from 0 to 70 (%).
MIR Threshold (%) Applicable only for AU. Sets the threshold of wireless link utilization
above which the MIR/CIR algorithm is activated.
The range is from 0 to 100 (%).
CIR Downlink (Kbps) Applicable only for SU. The Committed Information Rate of the
downlink from the AU to the SU. The CIR value cannot be higher than
the corresponding MIR value.
Available values are shown below. Valid values are multiples of 128
(N*128).
CIR Uplink (Kbps) Applicable only for SU. The Committed Information Rate of the uplink
from the SU to the AU. The CIR value cannot be higher than the
corresponding MIR value.
Available values are shown below. Valid values are multiples of 128
(N*128).