LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
67
User Manual 1173.9628.02 ─ 16
Number of acknowledgments and negative acknowledgments received via the
PUSCH since the start of the measurement. No answer at all (neither ACK or
NACK) is counted as DTX.
The results are presented as absolute number and as percentage relative to the
number of sent scheduled subframes.
●
BLER
:
Block Error Ratio, percentage of sent scheduled subframes for which no acknowl-
edgment has been received. The formula used to calculate the BLER is configura-
ble, see
on page 195. By default the following formula is
used:
BLER = (NACK + DTX) / (ACK + NACK + DTX)
●
Throughput
:
Throughput calculated from the number of acknowledged transport blocks (number
of received ACK multiplied with bits per transport block, divided by the time).
The throughput is calculated for each 200 processed subframes. From the result-
ing throughput values the instrument determines the average value and the mini-
mum and maximum values.
The "Relative" average throughput indicates the average throughput as percentage
of the maximum possible throughput, i.e. of the throughput that would be reached
with ACK = 100%.
Confidence BLER results
●
PCC or SCC Pass/Fail
:
When a pass/fail decision has been made for the carrier, one of the following result
values is displayed:
–
"Early Pass" / "Early Fail":
An early pass or early fail limit was exceeded and an early decision has been
made.
–
"Pass" / "Fail":
The configured minimum test time is larger than the early decision table. The
pass/fail decision has been made using the test limit.
The pass/fail decision is always based on the overall BLER results of the carrier,
independent of the number of downlink streams.
When a pass/fail result is displayed for a carrier, the measurement may continue to
derive the pass/fail result for another carrier and the overall pass/fail result.
●
Over All Pass/Fail
:
For measurements with carrier aggregation, an overall pass/fail result is derived
from the PCC/SCC pass/fail results.
The meaning of the overall result depends on the configured "Over All Stop Deci-
sion". For the stop decision "PCC only", the overall result equals the PCC result.
For the stop decision "SCC1 only", the overall result equals the SCC1 result.
For the "All Carrier, ..." stop decisions, the overall result has the following meaning:
–
"Early Fail": at least one carrier "Early Fail"
–
"Fail": no carrier "Early Fail", at least one carrier "Fail"
–
"Early Pass": all carriers "Early Pass"
–
"Pass": at least one carrier "Pass", no "Fail", no "Early Fail"
●
Specified BLER Level
:
General Description
深圳德标仪器
135-1095-0799