User manual

Chapter 2 - Managing a Single Device/Cell Service Parameters Page
AlvariCRAFT Device Manager 125 User Manual
the Ethernet port during the last N seconds, the unit is allowed to transmit N
times its allowed IR value without any delay. For example, if the Burst Duration is
set to 0.5 second (or more), then after a period of inactivity of 0.5 seconds up to
2048 Kbits x 0.5 = 1024 Kbits may be transmitted to a unit whose applicable MIR
value is 2048 Kbps, without any delay (provided overall conditions in the wireless
link allow this burst).
The MIR/CIR section includes the following parameters:
MIR Ranges:
2.20.1.4 Proportional IR Factor (SU Only)
When an SU operates at low modulations, the MIR values may become irrelevant.
A device that, due to environment limitations, always transmits at lower
modulations needs more time to reach the MIR values than devices that transmit
at high modulations. In this situations, the MIR/CIR algorithm is not able to
deliver an adequate level of fairness. The Proportional IR Factor (PIF) addresses
this issue.
Using this factor, the MIR/CIR values used by the device will be adjusted.
Depending on the average rate (modulation) used and the Proportional IR Factor,
MIR Downlink (Kbps) Applicable only for RB. The Maximum Information Rate of the
downlink from the BU to the RB. The MIR value cannot be lower than
the corresponding CIR value.
Available values are shown below. Valid values are multiples of 128
(N*128).
MIR Uplink (Kbps) Applicable only for RB. The Maximum Information Rate of the uplink
from the RB to the BU. The MIR value cannot be lower than the
corresponding CIR value.
Available values are shown below. Valid values are multiples of 128
(N*128).
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).
Unit Type MIR Downlink/Uplink (Kbps)
RB-B10 128-4,092
RB-B14 128-6,912
RB-B28 128-22,016
RB-B100 128-107,904