# KPIs Supported in LTE AP

The following table provide information about KPIs supported by LTE APs.

Table 1. System KPIs
KPI Description
DCR (Dropped Call Rate) To calculate Dropped Call rate, use the following formula:

(100*A)/(B+C)

A = Number of dropped calls

B = Number of additional E-RABs successful to setup

C = Number of initial E-RABs successful to setup

To calculate per venue/system, use ∑ of all RSCs.

RRC Connection Establishment Success rate To calculate RRC Connection Establishment Success rate, use the following formula:

(∑A/∑B)*100

where

A = Number of RRC connection establishment successes

B= Number of RRC connection establishment attempts

To calculate per venue/system, use ∑ of all RSCs.

RRC Connection Re-establishment Success rate To calculate RRC Connection Re-establishment Success rate, use the following formula:

(∑A/∑B)*100

where

A = Number of RRC connection re-establishment successes

B= Number of RRC connection re-establishment attempts

To calculate per venue/system, use ∑ of all RSCs.

Initial E-RAB Setup Success rate To calculate initial E-RAB Setup Success rate, use the following formula:

(∑A/∑B)*100

where

A = Number of initial E-RABs successful to setup

B = Number of initial E-RABs attempted to setup

Additional E-RAB Setup Success rate To calculate additional E-RAB Setup Success rate, use the following formula:

(∑A /∑B)*100

where

A = Number of additional E-RABs successful to setup

B = Number of additional E-RABs attempted to setup

Initial Bearer Setup Success Rate To calculate Initial Bearer Setup Success rate, use the following formula:

(A*100)/B

where

A = Number of initial E-RABs successful to setup

B = Number of initial E-RABs attempted to setup

Additional Bearer Setup Success Rate To calculate Initial Bearer Setup Success rate, use the following formula:

(A*100)/B

where

A = Number of additional E-RABs successful to setup

B = Number of additional E-RABs attempted to setup

Handover Success rate To calculate Handover Success rate, use the following formula:

(∑A/∑B)*100

where

A= Number HO successes

B = Number HO attempts

SAS Availability To calculate SAS Availability, use the following formula:

[(A-B)/A]*100

where

A = Measurement Period

B = SAS unavailable time

Cell Availability To calculate cell availability, use the following formula:

[(A-B)/A]*100

where
• A = measurement_period
• B = sum of cell unavailable time
Average Cell Availability To calculate average cell availability per venue/system, use the following formula:

{ 1 - (U/T) } * 100 = %

where
• U = average cell unavailability in seconds = (S/R)
• S = sum of all Cell Unavailable time from all RSCs
• R = total number of RSCs
• Reporting interval in seconds

To calculate average cell availability for plots, compute and display cell availability on the charts/plots (if possible) or the reported Cell unavailability time.

Average number of Active UEs To calculate average number of active UEs per venue/system, use sum of all UEs for RSCs.
Total DL Traffic Volume (GBytes) To calculate total DL traffic volume per RSC, use the following formula:

∑ of all dlTrafficVolume reported for the RSC in a given interval of reporting time.

Total UL Traffic Volume (GBytes) To calculate total UL traffic volume per RSC, use the following formula:

∑ of all ulTrafficVolume reported for the RSC in given a interval of reporting time.

Frequency Synchronized Frequency synchronized is reported as A or calculated in percentage value as

Frequency Synchronization = (1-A/T)*100

where

A = ∑ of all frequencySyncLossTime reports for all RSC with GPS / # no. of RSC with GPS

T = Reporting Time interval

Table 2. System Throughput KPIs
KPI Description
Average DL Throughput (Mbps) To calculate per venue/system, use (∑ of all RSCs)/# of RSCs.
Average UL Throughput (Mbps) To calculate per venue/system, use ∑ of all RSCs.
DL Traffic Volume (GBytes) To calculate per venue/system, use ∑ of all RSCs.
UL Traffic Volume (GBytes) To calculate per venue/system, use ∑ of all RSCs.
Table 3. System GPS KPIs
KPI Description
GPS Availability The GPS availability is reported as A or calculated in percentage value as

GPS Availability = (1-A/T)*100

where

A = (∑ of all gpsUnavailableTime reports for each RSC with GPS as timing source/ # no of RSC with GPS ) - Reporting Time

T = Reporting Time interval

Phase Locked To calculate Phase Locked, use the following formula:

[(A-B)/A]*100

where

A = measurement_period

B = Phase sync loss time

For per venue KPI, use the following formula:

Phase sync loss time = ∑ of all GPS RSC /# no of RSC with GPS

Holdover To calculate Holdover, use the following formula:

100-A

where

A = Percentage of time in Phase Locked

To calculate per venue KPI, use the following formula:

percentagePhaseLocked = ∑ of all percentageHoldover from RSC with GPS /# no of RSC with GPS

Frequency Phase Recovery To calculate Frequency Phase Recovery, use the following formula:

(A/B)*100

where

A = Frequency Sync Loss Time

B= meaurement_period

To calculate per venue KPI, use the following formula:

frequencySyncLossTime = ∑ of all GPS RSC /# no of RSC with GPS