System Manual
BreezeCOMPACT System Manual
130
Chapter 3: Operation and Administration
Procedures
Performance Monitoring
#
KPI RReport
Unit
Description
Calculation
Guidelines
10
SINR
Distribution
Downlink
Ratio
Downlink Signal-to-
Interference-plus-Noise
ratio (SINR)
distribution is
based on a Channel
Quality Indication (CQI)
report by the UE to the
eNodeB. UE
measurements are made
on the DL.
The h
igher the CQI value
(from 0 to 15) reported by
the UE, the higher the
modulation scheme (from
QPSK to 64QAM) and
the
higher the coding rate
used by the eNodeB to
achieve better efficiency.
Ratio of CQI
index
consumption
within the
sampling
period
11
SINR
Distribution
Uplink
Ratio
UL SINR is measured by
the eNodeB, based on
the
UL. The report presents
the ratio of SINR
distribution on the UL,
from -10dB to 40dB, in
1dB steps.
Ratio of UL
SINR per dB
12
HARQ
Retransmis-
sion
Downlink
Ratio
A Hybrid Automatic
Repeat Request (HARQ
) is
used for error corrections
on the PHY level, enabling
short retransmission
periods and improved
performance. Depending
on the QCI configuration
of the HARQ
retransmission, after a
number of HARQ
retransmissions,
the burst
is considered as an
error to
the upper layers.
The DL HARQ
retransmission is reported
from
Zero
retransmission
s
to
Above Four
retransmissions.
Ratio per
number of
retransmis-
sions
13
UE RRC
Registration
Procedure
Count
A UE registration
procedure is done every
time the UE attempts to
connect to the system. Th
is
report measures the
number of successful and
failed registrations.
Count of total
(s
uccessful and
failed)
registration
attempts
The report may
enable the operator
to identify
network-level issue
s
with failed
registrations,
which
should be very low.
14
UE Handover
Count
A UE handover is the
process of the
UE moving
from one eNodeB to
another. This report
counts the UE handovers
within the sampling
period.
Count UE
Handover
successful
and
failed attempts
The report may
enable the operator
to identify
network-level
handover activity
, in
order to assist
with
network
optimization.