This document provides formulas and proposed targets for key performance indicators (KPIs) related to LTE network monitoring. It includes KPIs for LTE OSS statistics measured at the network level and LTE drive test KPIs measured through field testing. For each KPI, it provides the detailed formula, measurement methodology, and a brief description. The goal is to establish a framework for initial discussion on monitoring LTE network performance.

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LTE
KPI Statistic and Formula
Traffic and Capacity Formula

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KPI Statistic and Formula

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LTE KPI Acceptance Scope
LTE Drive Test KPI
LTE OSS Statistics KPI
LTE KPI Proposal
Appendix

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KPI Acceptance Scope
There are two KPI monitoring for LTE.
1. OSS Statistics KPI
2. Drive Test KPI
This document provides a brief description for initial discussion about LTE
KPI monitoring for LTE Network.

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LTE KPI Acceptance Scope
LTE Drive Test KPI
LTE OSS Statistics KPI
LTE KPI Proposal
Appendix

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LTE OSS Statistics KPI
NSN Formula NSN Formula
NSN
Formula
Target
Proposed
(%)
Usage Cell Availability excl. BLU LTE_5239a 100.00
Accessibility RRC Connection Setup Success Ratio LTE_5218c 97.00
Accessibility E-RAB Setup Success Ratio LTE_5017a 97.00
Retainability E-RAB Drop Ratio LTE_5025d 2.00
Mobility Intra-eNB Handover Success Ratio LTE_5035a 95.00
Mobility Inter-eNB HO Success Ratio (X2-Based) LTE_5048b 95.00
Mobility Inter-RAT HO Success Ratio LTE_5195a 90.00

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RRC Con SSR = (no.of
samples when cell is
available / number of all
samples when cell is
planned unavailable ) * 100%
100 * sum ([M8020C3]) / sum
([M8020C6] - [M8020C4])
100 * sum ([SAMPLES_CELL_AVAIL]) / sum
([DENOM_CELL_AVAIL – SAMPLES_CELL_PLAN_AVAIL])
Description :
Shows the Cell Availability, excluding blocked by user state (BLU) that
gives the percent of available time over time that should be available.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
Cell Availability excl. BLU

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RRC Con SSR = (RRC
connection setup
completions / RRC
connection requests) * 100%
100 * sum ([M8013C5]) / sum
([M8013C17]+ [M8013C18]+
[M8013C19]+ [M8013C20]+
[M8013C21])
100 * sum ([SIGN_CONN_ESTAB_COMP]) / sum
([SIGN_CONN_ESTAB_ATT_MO_S] +
[SIGN_CONN_ESTAB_ATT_MT] +
[SIGN_CONN_ESTAB_ATT_MO_D] +
[SIGN_CONN_ESTAB_ATT_OTHERS]+
[SIGN_CONN_ESTAB_ATT_EMG])
Description :
Shows the setup success ratio for the elementary procedure “RRC
connection establishment” used to setup a radio connection from UE to
eNB.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
RRC Connection Setup Success Ratio

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RRC Connection Setup Overview

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E-RAB SSR = (E-RAB setup
successes / E-RAB setup
attempts) * 100 %
100 * sum ([M8006C1]) / sum
([M8006C0])
100 * sum ([EPS_BEARER_SETUP_COMPLETIONS]) / sum
([EPS_BEARER_SETUP_ATTEMPTS])
Description :
Describes the setup success ratio of the elementary E-RAB setup procedure
used to setup the E-RAB between MME and UE.
It indicates the E-UTRAN contribution to network accessibility for the end
user, not the whole end-to-end service accessibility.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-RAB Setup Success Ratio

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Attach Procedure

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Attach Procedure (continued)

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E-RAB DR = (abnormal E-RAB
releases from RAN point of view /
all E-RAB releases) * 100%
100 * sum ([M8006C12]+[M8006C14]+
[M8006C13])/
Sum ([M8006C6]+[M8006C7]+
[M8006C8]+ [M8006C9]+
[M8006C15]+[M8006C10]+
[M8006C12]+[M8006C14]+
[M8006C13] + [M8006C174] +
[M8006C175])
100 * sum ([ENB_EPS_BEARER_REL_REQ_RNL]+
[ENB_EPS_BEARER_REL_REQ_TNL]+
[ENB_EPS_BEARER_REL_REQ_OTH]) /
sum ([EPC_EPS_BEARER_REL_REQ_NORM]+
[EPC_EPS_BEARER_REL_REQ_DETACH]+
[EPC_EPS_BEARER_REL_REQ_RNL]+
[EPC_EPS_BEARER_REL_REQ_OTH] +
[ENB_EPS_BEAR_REL_REQ_RNL_REDIR]+
[ENB_EPS_BEARER_REL_REQ_NORM] +
[ENB_EPS_BEARER_REL_REQ_RNL]+
[ENB_EPS_BEARER_REL_REQ_TNL]+
[ENB_EPS_BEARER_REL_REQ_OTH] +
[PRE_EMPT_GBR_BEARER ]+
[PRE_EMPT_NON_GBR_BEARER])
Description :
Describes the ratio of abnormally released (dropped) E-RABs from RAN point of view.
Each bearer of the "Bearer to be Released List" IE is counted. RAN point of view
means that as abnormal E-RAB drops only those ones initiated by eNB are counted.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-RAB Drop Ratio

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eNodeB Initiated Transition to ECM Idle
Transition due to inactivity
UE consumes less battery power in idle mode
Less active UEs which network has to handle
Fast going to inactivity has drawback of longer connection setup time (more transitions idle to connected)
eNB
UE MME S -GW
S 1 AP : UE Context Release Command
S 1 AP : UE Context Release Complete
RRC : RRC Connection Release
Release all UE related
resources,
remove UE context
Detect user inactivity
or other eNB trigger
S 1 AP : UE Context Release Request
UE in RRC-CONNECTED
L2 ACK
InactivityTimer
LNCEL, 10..65535 s, 300s
S11 interaction to inform S-GW
aboout connection release
Set UE to
RRC-IDLE
Set UE to
ECM-IDLE

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S1AP: UEContextReleaseRequest
With cause
eNodeB initiated EPS bearer release
M8006C10 /C125 normal release of any/QCI1 bearer(UE inactivity)
M8006C15/C161 radio network layer inter-RAT redirection of any/QCI1 bearer
eNodeB initiated transition to ECM idle
M8013C13 normal release
S1AP: UEContextReleaseCommand
With cause
S1AP: UEContextReleaseComplete
eNB MME
ECM_IDLE
ECM_CONNECTED
Transition to ECM Idle (Positive)
EPC initiated EPS bearer release
M8006C6/C89 normal release of any/QCI1 bearer (UE initiated)
M8006C7/C98 detach of any/QCI1 bearer (UE or MME initiated)
EPC initiated transition to ECM idle
M8013C9 normal release (UE initiated)
M8013C10 detach (UE or MME initiated)
Radio bearer release
M8007C3 normal release
M8007C4 detach
M8006 EPS Bearer Measurements: cell level
M8007 Radio Bearer Measurements: cell level
M8013 UE State Measurements: cell level

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S1AP: UEContextReleaseRequest
With cause
S1AP: UEContextReleaseCommand
With cause
S1AP: UEContextReleaseComplete
eNB MME
ECM_IDLE
ECM_CONNECTED
Transition to ECM Idle (Negative)
eNodeB initiated EPS bearer release
M8006C12/C134 radio link failure for any/QCI1 bearer
M8006C14/C152 transport network unavailable for any/QCI1 bearer
M8006C13/C143 other failure for any/QCI1 bearer
eNodeB initiated transition to ECM idle
M8013C15 radio link failure
M8013C16 other failure
Radio bearer release
M8007C5 radio link failure
M8007C6 other failure
Radio link failure detected by eNodeB
Air interface problem

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Intra HO SR = (number of
successful intra eNB Hos) /
(number of intra eNB HO
attempts) * 100%
100 * sum ([M8009C7]) / sum
([M8009C6])
100 * sum ([SUCC_INTRA_ENB_HO]) / sum
([ATT_INTRA_ENB_HO])
Description :
Describes the success ratio for the handover execution phase, when the
source eNodeB receives information that the UE is successfully connected
to the target cell within own eNodeB.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
Intra-eNodeB Handover Success Ratio

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Intra-eNodeB Handover Procedure

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Inter X2 based HO SR =
(number of successful inter
eNB X2 based HOs) /
(number of inter eNB X2
based HO attempts) * 100%
100 * sum ([M8014C7]) / sum
([M8014C6])
100 * sum ([SUCC_INTER_ENB_HO]) / sum
([ATT_INTER_ENB_HO])
Description :
Describes the success ratio for the inter-eNB X2-based handover execution
phase, when the source eNodeB receives information that the UE is
successfully connected to the target cell within target eNodeB.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
Inter-eNodeB Handover Success Ratio

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Inter-eNodeB Handover Procedure
Preparation

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Inter-eNodeB Handover Procedure
Execution

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Inter-eNodeB Handover Procedure
Completion

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Inter RAT based HO SR =
(number of successful inter
RAT HOs) / (number of inter
RAT HO attempts) * 100%
100 * sum ([M8016C23]) /
sum ([M8016C21])
100 * sum ([ISYS_HO_SUCC]) / sum ([ISYS_HO_ATT])
Description :
Describes the success ratio for the inter RAT handover execution phase,
when the source eNB receives information that the UE successfully is
connected to the target cell (WCDMA).
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
Inter-RAT Handover Success Ratio

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LTE OSS Statistics KPI
LTE KPI Acceptance Scope
Appendix
LTE Drive Test KPI
LTE KPI Proposal

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LTE Drive Test KPI
KPI Class Network KPI Target
Accessibility PS Data Call Setup Success Ratio 98.00 %
Accessibility CSFB Call Setup Success Ratio 97.00 %
Retainability PS Data Call Drop Ratio 2.00 %
Mobility Intra-LTE Handover Success Ratio 97.00 %
Mobility Inter-RAT Handover Success Ratio 90.00 %
Integrity Peak User Throughput DL 10.00 Mbps
Integrity Peak User Throughput UL 3.00 Mbps

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Description :
Ratio between successfully established EPS bearers compared to the overall number of EPS bearer
establishment attempts. It corresponds to the probability that a user or the LTE network can establish an
EPS bearer at any moment in time. Requests which are terminated by timer expiry (due to the
unavailability of some LTE resource) are considered as unsuccessful attempts. Authentication errors
(requests rejected by the MME) are included in the total number of failures.
Only the first RRC CONNECTION REQUEST is to be considered, since counting retries of the same
message would increase the overall number of bearer establishment attempts, and thus reduce the
success ratio.
PS Data Call Setup Success Ratio
Formula :
- Success : RRC CONNECTION RECONFIGURATION COMPLETE message sent by the UE.
- Total : an attempt is the sending of RRC CONNECTION REQUEST with appropriate establishment
cause by the UE.

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Methodology :
Pre-condition
1. UE status before measurement : EMM-REGISTERED and ECM-IDLE.
2. UE is locked to LTE network.
PS Data Call Setup Success Ratio (continued)
Test Procedure
1. Set the FMT to generate calls to the FTP Server automatically with the following script/sequence:
a. Connection attempt
b. Log into the FTP Server
c. FTP Download of 1 GB file for 15 sec
d. Stop download (connection release)
e. Leave 15 sec before starting the next session
f. Repeat all previous steps (from ‘a’)
2. Start drive test and continue driving until drive route is completed.
3. Verify the Packet Data Call Setup Success Rate

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Description :
Ratio between successfull Call Alerting in UTRAN and number of Extended Service Request for CSFB in
E-UTRAN.
CSFB Call Setup Success Ratio
Formula :
- Success : ALERTING MESSAGE message received by the UE in UTRAN networks.
- Total : an attempt is the sending of EXTENDED SERVICE REQUEST with appropriate establishment
cause by the UE in LTE networks.

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Methodology :
Pre-condition
1. UE status before measurement: EMM-REGISTERED and ECM-IDLE.
2. UE is not locked to LTE network.
CSFB Call Setup Success Ratio (continued)
Test Procedure
1. Set the FMT to generate calls to test call number (i.e. 199) automatically with the following script/sequence:
a. CS call attempt to 199
b. CS call for 5 sec
c. Terminate CS call from UE (connection release)
d. Leave 30 sec before starting the next session and ensure UE already reselects back to LTE
e. Repeat CS call attempt (from ‘a’)
2. Start drive test and continue driving until drive route is completed.
3. Verify the CSFB Call Setup Success Ratio.

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Definition :
Ratio between abnormally released bearers, and the overall number of established EPS bearers. An
abnormal release is defined as any EPS bearer termination, which was not triggered by the mobile user
(from UE side). Thus, it reflects the probability that an established bearer gets aborted due to insufficient
network resources.
PS Data Call Drop Ratio
Formula :
- Success: submission of the message RRC CONNECTION RECONFIGURATION COMPLETE by the
UE, see [3GPP36.331]
- Drop: successful establishments minus terminations by the user, i.e. the UE submitting a L3 DETACH
REQUEST (see [3GPP24.008]) carried within the RRC message UL NAS TRANSPORT (refer to
[3GPP36.331]).
For the calculation of a network initiated EPS bearer drop rate, ePC initiated L3 DETACH REQUEST-s
are to be considered.

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Methodology :
Pre-condition
1. UE status before measurement : EMM-REGISTERED and ECM-IDLE.
2. UE is locked to LTE network.
PS Data Call Drop Ratio (continued)
Test Procedure
1. Set the FMT to generate calls to the FTP Server automatically with the following script/sequence:
a. Connection attempt
b. Log into the FTP Server
c. FTP Download of 1 GB file for 15 sec
d. Stop download (connection release)
e. Leave 15 sec before starting the next session
f. Repeat all previous steps (from ‘a’)
2. Start drive test and continue driving until drive route is completed.
3. Verify the Packet Data Call Drop Rate

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Definition :
Ratio between successfuly intra-LTE Handover compare to intra-LTE Handover attempts.
Intra LTE handover is the basic mobility function for UEs in active mode. When one or more neighbour
cells are better than current serving cell the UE is ordered to handover to best cell. Best cell evaluation
is based on measurements of neighbour cells.
Intra-LTE Handover Success Ratio
Formula :
Intra LTE Outgoing and Incoming Handover successfully executed performed on X2 interfaces and S1,
intra eNB and inter eNB, with and without data forwarding. Event for Incoming Handover Execution has
been reported.
Intra-LTE HO SR = (Intra-LTE HO Success / Intra-LTE HO attempts) * 100

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Methodology
Pre-condition
1. UE status before measurement: EMM-REGISTERED and ECM-IDLE.
2. UE is locked to LTE network.
Intra-LTE Handover Success Ratio (continued)
Test Procedure
1. Set the FMT to generate calls to the FTP Server automatically with the following script/sequence:
a. Connection attempt
b. Log into the FTP server
c. FTP Download of 1 GB file
d. After FTP download is completed, repeat FTP download (from ‘c’)
2. Start drive test and continue driving until drive route is completed.
3. Verify the Intra-LTE Handover Success Rate

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Definition :
Ratio between successfully PS Handover to WCDMA network to PS Handover attempts to WCDMA
network.
Inter-RAT Handover Success Ratio
Formula :
PS Handover to WCDMA is successfully executed.
Inter-RAT HO SR = (PS HO success to WCDMA / PS HO attempts to WCDMA) * 100

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Inter-RAT Handover Success Ratio (continued)
Methodology :
Pre-condition
1. UE status before measurement: EMM-REGISTERED and ECM-IDLE.
2. UE is not locked to LTE network.
3. Test is performed on the edge of LTE coverage where WCDMA coverage is present.
Test Procedure
1. Set the FMT to generate calls to the FTP Server automatically with the following script/sequence:
a. Connection attempt
b. Log into the FTP server
c. FTP Download of 1 GB file
2. Start drive test and continue driving until UE is on the edge of LTE coverage and performing Inter-RAT Handover to UTRAN.
3. Verify the Inter-RAT Handover Success Rate.

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Definition :
After the connection to the FTP server has been successfully established, the parameter describes the
average data transfer rate measured over the data transfer phase (i.e. prerequisite to the data transfer is
successful Service Access (availability of an EPS bearer and connection to the FTP service). The data
transfer phase shall also be successfully terminated. The data rate is measured on physical layer in DL
and UL direction.
Peak User Throughput
Formula :
The peak throughput is measured on Physical layer (PDSCH) .

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Peak User Throughput
Drive Test Procedure
1. Set the FMT to generate calls to the FTP Server automatically with the following script/ sequence :
a. Connection attempt
b. Log into the FTP Server
c. FTP Download of 1 GB file x 5 sessions for 180 sec
d. Stop FTP Download (connection release)
e. Repeat FTP Download (from ‘c’)
2. Start the test in stationary position and continue until at least 3 samples are recorded.
3. Verify the peak DL/UL throughput performance.
Methodology :
Pre-condition
1. UE status before measurement: EMM-REGISTERED and ECM-IDLE.
2. UE is locked to LTE network.
3. UE is in stationary position and radio condition should be : RSRP ≥ - 80dBm, SINR ≥ 20 dB

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LTE OSS Statistics KPI
LTE KPI Acceptance Scope
Appendix
LTE Drive Test KPI
LTE KPI Proposal

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LTE Reporting Suite Component
The LTE Reporting Suite Component is designed to provide information for Service &
Network Planning, Service Creation, Service & Network Monitoring and Business Management.
It is used by different operational areas for :
– Network Dimensioning and Optimization
– Troubleshooting
– Traffic Trend analysis for Long term planning
– Network Performance
– Service Usage
Predefined reports are available off-the-shelf and are grouped in various
LTE reporting categories.
Optimisation
Configuration
Planning
Rel. 8 (LTE)
SAE GW
eNB
MME

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Pre-defined Reports Overview (1)
1. System Program
• RSLTE000: System Program
• RSLTE001: System Program (Cell Level)
2. Accessibility and Retainability
• RSLTE038: Accessibility and Retainability
• RSLTE003: Network Access - General and S1AP
• RSLTE004: Network Access - Service Access and RRC
• RSLTE037: Service Retainability
3. Mobility
• RSLTE005: HO analysis
• RSLTE031: Neighbour HO analysis
• RSLTE045: NACC to GSM per Neighbour
• RSLTE044: HO analysis for UTRAN per neighbor
4. Interface analysis
• RSLTE040: VLAN Statistics at Ethernet level
• RSLTE041: If analysis at Ethernet plain level
• RSLTE006: X2-Interface
• RSLTE007: IP interface traffic
• RSLTE032: IP interface traffic and QoS classes PHB
• RSLTE008: Ethernet Interface
• RSLTE033: VLAN analysis per QoS class
• RSLTE009: VLAN total volume analysis

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Pre-defined Reports Overview (2)
5. Modulation and Coding Scheme
• RSLTE039: NACK MCS Time
• RSLTE010: Transmissions and Volume per Low/High MCS
• RSLTE011: Percentage of transmissions per MCS
• RSLTE028: Data Volume per MCS
• RSLTE043: PUSCH 1ST_TRANS per MCS
• RSLTE042: Unsuccessful Transmissions per MCS
6. Integrity
• RSLTE034: IP Packet integrity
• RSLTE035: Packet delay
• RSLTE013: BLER per Modulation
• RSLTE014: Congestion per QoS classes for IP PHB
• RSLTE036: Congestion per QoS classes per VLAN
• RSLTE015: IPsec packets
7. Usage
• RSLTE016: Throughput at PDCP level and per QoS class
• RSLTE017: Physical Resource Block utilization
• RSLTE018: RLC, SDU, RRC, analysis
• RSLTE019: Power
• RSLTE020: MIMO
• RSLTE026: Active users per eNB
• RSLTE027: Active users per cell

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Pre-defined Reports Overview (3)
8. Signal Quality
• RSLTE022: CQI
• RSLTE029: SINR for PUCCH
• RSLTE023: RSSI for PUCCH
• RSLTE024: RSSI for PUSCH
• RSLTE025: SINR for PUSCH
9. FM Statistics
• ALARM STAT
10. Full List of reports
• All reports listed before to easy user access

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KPI THRESHOLD
Key Performance Indicator 5 MHz 10 MHz 15 MHz 20 MHz
CSFB Call Setup Success Rate 97.00% 97.00% 97.00% 97.00%
PS Data Call Setup Success Rate 98.00% 98.00% 98.00% 98.00%
PS Data Call Drop Rate 2.00% 2.00% 2.00% 2.00%
Intra-LTE Handover Success Rate 97.00% 97.00% 97.00% 97.00%
Inter-RAT Handover Success Rate 90.00% 90.00% 90.00% 90.00%
RSRQ Distribution >= -7 dB 80.00% 80.00% 80.00% 80.00%
**Max DL Throughput (Static Test) 5 Mbps 7.5 Mbps 10 Mbps 12.5 Mbps
**Max UL Throughput (Static Test) 1 Mbps 1.8 Mbps 3.5 Mbps 5 Mbps
Key Performance Indicator Target
Site Availability 100%
RRC Connection Setup Success Ratio 97.00%
E-RAB Setup Success Rate 97.00%
E-RAB Drop Rate 2.00%
Intra LTE HO Success Rate (X2 based) 95.00%
**Inter-RAT HO Success Ratio 90.00%
OSS KPI
DT KPI

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Traffic and Capacity Statistic and Formula

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LTE Traffic and Capacity Statistic Formula
Class Network KPI NSN Formula
Throughput
E-UTRAN average PDCP Layer Active Cell Throughput
DL
LTE_5292d
Throughput Maximum PDCP Throughput DL LTE_291b
Throughput
E-UTRAN average PDCP Layer Active Cell Throughput
UL
LTE_5289d
Throughput Maximum PDCP Throughput UL LTE_288b
Payload E-UTRAN PDCP SDU Volume DL LTE_5212a
Payload E-UTRAN PDCP SDU Volume UL LTE_5213a
Cell Resource E-UTRAN Average PRB usage per TTI UL LTE_5273b
Cell Resource E-UTRAN average PRB usage per TTI DL LTE_5276b
Capacity E-UTRAN Average Active Connected UEs LTE_5804c
Capacity E-UTRAN Maximum of Average Active Connected UEs LTE_5214a
Capacity E-UTRAN Average RRC Connected Ues LTE_5242a
Paging S1_PAGING M8000C11 (S1 Paging requests)
CSFB
E-UTRAN CS Fallback Attempts with redirection via
RRC Connection Release Distribution Rate, connected
mode
LTE_5109a
CSFB
E-UTRAN CS Fallback Attempts with redirection via
RRC Connection Release Distribution Rate, idle mode
LTE_5110a

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AVG DL PDCP CELL THP =
average PDCP cell
throughput DL
8*sum(M8012C20)/sum(M80
12C90)
8*sum(PDCP_SDU_VOL_DL)/sum(ACTIVE_TTI_DL)
Description :
This KPI shows the active average PDCP layer throughput per cell in
downlink direction
Logical formula
Summarization
formula (PI ID) Summarization formula (Netact names)
E-UTRAN average PDCP Layer Active Cell Throughput DL

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Maximum PDCP Throughput
DL = max (PDCP Data Rate
Max DL)
max (M8012C25 ) max ( PDCP_DATA_RATE_MAX_DL )
Description :
This KPI gives indication of the eUu interface traffic load by reporting Max
DL PDCP traffic throughput.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
Maximum PDCP Throughput DL

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AVG UL PDCP CELL THP=
average PDCP cell
throughput UL
100 * sum ([M8012C19]) /
sum ([M8012C89])
8*sum(PDCP_SDU_VOL_UL)/sum(ACTIVE_TTI_UL)
Description :
This KPI shows the active average PDCP layer throughput per cell in uplink
direction
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN average PDCP Layer Active Cell Throughput UL

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Maximum PDCP Throughput
UL = max (PDCP Data Rate
Max UL)
max (M8012C22) max ( PDCP_DATA_RATE_MAX_UL )
Description :
This KPI gives indication of the eUu interface traffic load by reporting Max
UL PDCP traffic throughput.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
Maximum PDCP Throughput UL

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DL PDCP SDU VOL= PDCP
SDU VOL DL
sum(M8012C20)/1000000 sum(PDCP_SDU_VOL_DL)/1000000
Description :
This KPI shows the PDCP SDU volume on eUu interface per
cell in downlink direction.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN PDCP SDU Volume DL

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UL PDCP SDU VOL= PDCP
SDU VOL UL
sum([M8012C19])/1000000 sum([PDCP_SDU_VOL_UL])/10000000
Description :
This KPI shows the PDCP SDU volume on eUu interface per
cell in uplink direction.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN PDCP SDU Volume UL

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AVG UL PRBs = (average
(used/available)UL PRBs per
TTI)
avg([M8011C24])/10 avg([UL_PRB_UTIL_TTI_MEAN])/10
Description :
This KPI shows the average value of the Physical Resource
Block (PRB) utilization per TTI in uplink direction. The utilization
is defined by the ratio of used to available PRBs per TTI.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN Average PRB usage per TTI UL

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AVG DL PRBs = (average
(used/available) DL PRBs
per TTI)
avg([M8011C37])/10 avg([DL_PRB_UTIL_TTI_MEAN])/10
Description :
This KPI shows the average value of the Physical Resource
Block (PRB) use per TTI in downlink direction. The use is
defined by the ratio of used to available PRBs per TTI.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN average PRB usage per TTI DL

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ACT UE ENB=(average
number of active UEs per
eNB)
sum(M8018C8) /
sum(M8018C9)
sum(SUM_ACTIVE_UE_ENB)/sum(DENOM_ACTIVE_UE_ENB)
Description :
This KPI shows the average number of UE's having one SRB and at least
one DRB during the measurement period per eNB
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN Average Active Connected UEs

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MAX ACT UE ENB =
(maximum of average
number of active UEs per
eNB)
Max (avg(M8018C0)) Max (avg(ENB_LOAD_ACT_UE_AVG))
Description :
This KPI shows the maximum of average number of UE's having one SRB
and at least one DRB during the measurement period per eNB
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN Maximum of Average Active Connected UEs

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ACT UE Area = (average
number of RRC connected
UEs)
Sum
(M8001C318)/sum(M8001C31
9)
Sum (SUM_RRC_CONN_UE)/sum(DENOM_RRC_CONN_UE)
Description :
This KPI shows the average number of UE's having one SRB during the
measurement period
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN Average RRC Connected Ues

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S1_Paging = sum (S1 paging
requests)
Sum (M8000C11) Sum (S1_PAGING)
Description :
The number of S1 paging requests.
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
S1_PAGING

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CSFB AttDR = ( CS Fallback
Attempts _x / CS Fallback
Attempts all)*100%
100*Sum (M8016C12)
/sum(M8016C11)
100*sum(CSFB_REDIR_CR_CMODE_ATT) /
sum(CSFB_REDIR_CR_ATT)
Description :
This KPI describes the ratio of a specific CS Fallback Attempts related to all CS
Fallback Attempts with redirection via RRC Connection Release.
percentage CS Fallback attempts for UE in connected mode
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN CS Fallback Attempts with redirection via RRC Connection Release
Distribution Rate, connected mode

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CSFB AttDR = ( CS Fallback
Attempts _x / CS Fallback
Attempts all)*100%
100*sum(M8016C11-
M8016C12) / sum
(M8016C11)
100*sum(CSFB_REDIR_CR_ATT -
CSFB_REDIR_CR_CMODE_ATT) / sum(CSFB_REDIR_CR_ATT)
Description :
This KPI describes the ratio of a specific CS Fallback Attempts related to all CS
Fallback Attempts with redirection via RRC Connection Release.
percentage CS Fallback attempts for UE in idle mode
Logical formula
Summarization
formula (PI ID) Summarization formula (Abbreviation)
E-UTRAN CS Fallback Attempts with redirection via RRC Connection Release
Distribution Rate, idle mode

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