LTE KPI Mobility

MOBILITY-L14B

Neighbor cell load issue

pmHoPrepRejInHighLoad (MP load control) pmHoPrepRejInOverload (procedure latency supervision)

pmHoPrepRejInLicMob

pmHoPrepRejInLicRlcUm

Audit licenseState,featurestate,servicestate & other paramter related to MultiErabsPerUser feature

Audit licenseState,featurestate,servicestate & other paramter related to RlcUm feature capacityUnitConnectedUsers gracePeriodTimeLeft

pmHoPrepRejInLicConnUsers

Admission reject

Handover Preparation Failure

pmHoPrepAttLTEIntraF pmHoPrepSuccLTEIntraF pmHoPrepAttLTEInterF pmHoPrepSuccLTEInterF

Check "licenseCapacityConnectedUsers" of Target cell Also Graceperiod should be noticed to exceed the licensed capacity limits for a limited periodof timeOffload traffic from target cell

dlTransNwBandwidth , ulTransNwBandwidth zzzTemp20 , zzzTemp21 , pmRrcConnMax , pmRrcConnLevSum

pmHoPrepRejInBearerAdmissionRej

Configuration issue

pmCellDowntimeAuto pmCellDownLockAuto

Cell Down Auto Availability

Cell down

eNodeB Cause

Cell Down Manually Other checks

Equipment causes

HW/SW Cause

Alarms

Baseband Startup issue

UL RSSI

manually locked during network configuration issues ((eg. adding/changing/removing hardware) manually locked during parameter change (eg. activate feature)

Operation Cause

Check alarms , hardware status , reset eNB if required

preparation failure will be high if there is SW package corrupt

maximumTransmissionPower , partOfSectorPower confOutputPower , crsGain , pdschTypeBGain

Indoor coverage issue (Small cell , PICO , DOT , Hetnet) Physical changes (Tilt , Azimuth , height of antenna) Audit cell reselection parameters , Tune DL power related parameters (as mentioned beside) Check if there is scope of new site

maximumTransmissionPower , partOfSectorPower confOutputPower , crsGain , pdschTypeBGain

pmRadioUeRepCqiDistr , pmRadioUeRepCqiDistr2

Tune related parameters (as mentioned beside) , Audit cell reselection parameters Physical optimization (Tilt , Azimuth , height of antenna) also Identify overshooting cells causing interference in D

Check Power control parameters , Features like IRC & UL FSS can help to reduce UL interference. Check for Loose Connectors,Faulty Antenna(Tx & Rx antenna ports),VSWR alarms,Faulty TMA Connections/settings External interference (cable tv , repeaters (due to power leak issues) , airport , police communication system etc..)

pZeroNominalPucch pZeroNominalPusch

Alarm need to monitor , some alarms need to monitor are VswrOverThreshold , Serviceunavailable (S1 connection failure) , Gigabit Ethernet Link Fau

Mobility

Configuration issues

LTE KPI Handover Execution Failure

Cell Down Auto

pmHoExeAttLTEIntraF pmHoExeSuccLTEIntraF pmHoExeAttLTEInterF pmHoExeSuccLTEInterF

Legend:

Cell down

pmCellDowntimeAuto pmCellDownLockAuto

Cell Down Manually

Availability

Counters

Configuration issue Operation issues

HW issues Target cell RACH issue Wrong neighbour Tune HO related parameters

Other imp checks

Transport nw Issue EPC Cause

Inter-f load balancing

Session Continuity

MCPC

Intra LTE

Inter RAT Session continuity

pmCriticalBorderEvalReport pmBadCovSearchEvalReport

Operation Cause

check for alarms like Service Unavailable(S1 connection failure

manually locked during network configuration issues ((eg. adding/changing/removing hardware) manually locked during parameter change (eg. activate feature)

Verify symtoms for sleeping cell

trace from MSG1 to MSG5 , verify symtoms for sleeping cells Power setting issue

Check SectorEquipmentFunction:ConfiguredOutputPower & EutrancellFDD:partOfSectorPower

Idle mode parameter issue

Cell Barred

Check EutrancellFDD MO cell selection and reselection parameters & 3G&2G cell reselection parameter/featur

Check Cell Barred , acBarring for different scenarios

preambleInitialReceivedTargetPower , cellrange powerRampingStep (Hardcoded) , preambleTransMax (Hardcoded) numberOfRA-Preambles (Hardcoded)

CM cross-check

Tune RACH related parameters , also check symptoms for sleeping cell (mentioned below) Improve RF conditions (by parameters or physical optimization (tilt/azimuth/antenna height)

EUtranCellRelation ExternalEUtranCellFDD

cellIndividualOffsetEUtran ; a3offset ; hysteresisA3 ; timeToTriggerA3 , isHoAllowed , filterCoefficientEUtraRsrp , sMeasure.

Inter freq LTE

a5Threshold1RSRP ; a5Threshold2RSRP ; hysteresisA5 ; timeToTriggerA5 , a2ThresholdRsrpPrim , timeToTriggerA2Prim , hysteresisA2Prim

Missing / Incorrect TA list , MME configuration check

pmUeCtxtRelSCEutra

a2ThresholdRsrpPrim ,hysteresisA2Prim , timeToTriggerA2Prim , a5B2MobilityTimer

Highload

RRC Connected user Traffic volume related counters

configuration

Check eNodeB configuration

Connected mode priority

Check eNodeB configuration

Coverage of target freq is poor , Tune parameters below to control SC

a2ThresholdRsrpPrim ,hysteresisA2Prim , timeToTriggerA2Prim , a5B2MobilityTimer

Coverage of target RAT is poor , Tune parameters below to control SC

a1a2SearchThresholdRsrp , hysteresisA1A2SearchRsrp , searchEffortTime Tune parameters according to number of carriers in LTE timeToTriggerA1Search , timeToTriggerA2Search , a2CriticalThresholdRsrp hysteresisA2CriticalRsrp , timeToTriggerA2Critical , zzzTemporary13 , zzzTemporary14 Target Cell Availibility

Handover Preparation Failure IRAT

Baseband Trace can be used , te enable all bbmcBbOmMeSwU

pmErabRelAbnormalEnbActTnFail

TN Outage / Flicker Alarm , S1 or X2 interfaces DOWN (Transport Resource Unavailable) , Also check 3G collocated nodeb in term of SCTP LOSS , TN & SGW alarm chec

MME configuration

pmUeCtxtRelSCWcdma

S1 issues

Check HW issues , alarms , improper cabling , connector issues , DUS Board error

pmRaAttCfra , pmRaSuccCfra

qciSubscriptionQuanta , lbThreshold , lbCeiling , hysteresisA5 pmHoExeAttLteInterFLb , pmHoExeSuccLteInterFLb cellSubscriptionCapacity , a5Threshold1Rsrp , pmHoPrepAttLteInterFLb , pmHoPrepSuccLteInterFLb a5Threshold2Rsrp

LTE Inter Frequency Session Continuity

Baseband Startup issue

pmCellDowntimeMan pmCellDownLockMan

Catch Trace(Baseband)

ensure proper configuration , especially for all new site which are integrated recently

Ensure the eNodeB structure of the restart, MP、Baseband or RRU lh all llog -l (do complete eNB health checkup)

check for alarms like Service Unavailable(S1 connection failure) , Ip packet loss "above" SGW

pmRaAttCbra , pmRaSuccCbra , pmRaFailCbraMsg2Disc pmRaAttCfra , pmRaSuccCfra , pmRaFailCfraMsg2Disc pmRaAllocCfra , pmRrcConnEstabAtt , pmRrcConnSucc

Non-access issue

Parameter

Auto Restart

Transport Cause

Sleeping Cell

Action plan

eNodeB Cause

EPC Cause HW issues & Alarms

check for alarms like Service Unavailable(S1 connection failure

Audit PCI of near by sites , also check if there is overshooting cell creating conflict , OSS PCI conflicting functio

pmRadioRecInterferencePwr pmRadioRecInterferencePwrPucch pmRadioRecInterferencePwrPrb1~100 pmSinrPucchDistr , pmSinrPuschDistr Alarms

Baseband Trace can be used , te enable all bbmcBbOmMeSwU

pmErabRelAbnormalEnbActTnFail

If MME pool is different at source and target then HO-Preparation fail will be 100%, command "get . termpointmme" can be used to find out the MME pool IP

pmBadCovEvalReport pmRadioTbsPwrRestricted pmBadCovSearchEvalReport

Poor DL SINR (CQI)

S1 issues

check for alarms like Service Unavailable(S1 connection failure) , Ip packet loss "above" SGW

Check HW issues , alarms , improper cabling , connector issues , DUS Board error

SW package PCI confliction or confusion

pmCellDowntimeMan pmCellDownLockMan

RRU Issue / Antenna Issue

ensure proper configuration , especially for all new site which are integrated recently

Ensure the eNodeB structure of the restart, MP、Baseband or RRU lh all llog -l (do complete eNB health checkup)

Common alarm : "resource configuration disable" , RRU fault , link failure , Check current & history alarms & take necessary action according to type of Alarm Check RRU status , Reset boards , Verify SW on node S1 links down due to faulty interface board. Check related alarms like Serviceunavailable (S1 connection failure,Hardware failure,GeneralHwError,GeneralSwError,Gigabit Ethernet Link Fault)

HW issues MME pool

Auto Restart

Transport Cause EPC Cause

Coverage issues

Audit UE Admission Control,Bearers (SRB & DRB) Admission Control,Transport Network Admission Control & Emergency ca prioritization Physical changes (Tilt , Azimuth , height of antenna) to offload traffic from target cell

Check configuration issues (especially after new site is integrated) (check MO ExternalEUtranCellFDD,EUtranCellRelation,TermPointToENB,TermPointToMme) (also check config para ex. Activeplmnlist,PCI , TAC , EutranFrequencyRef , IP address of TermPointToENB & MME Configuration issues

LTE Intra/Inter Frequency(HOSR)

Check these counters on target cell , Reduce no. of HO by physical opti or features (UE Level Oscillating Handover Minimization & Automated Mobility Optimization) MP capacity of DUS is higher than DUL , to increase MP capacity DUL can be replaced by DUS Physical changes (Tilt , Azimuth , height of antenna) to offload traffic from target cell Offload Target cell Load by changing Layering strategy, Idle mode cellreselection, connected mode mobility & Load balancing parameters

Audit licenseState,featurestate,servicestate & other paramter related to Intra freq HO feature

pmHoPrepRejInLicMultiErab Neighbor cell License issue

tInactivityTimer , dlMaxRetxThreshold , ulMaxRetxThreshold , qOffsetcellEUtran , qRxLevMin SchedulingAlgorithm , crsGain , tPollRetransmitUl (DRB & SRB) , tPollRetransmitDl (DRB & SRB) numInitialAccessAndIncomingHo (system constant) , SpdcchLaGinrMargin (system constant) ulInterferenceForgettingFactor (system constant) , deltaPsdRs2Tx (system constant ) noOfPucchCqiUsers , noOfPucchSrUsers , pdcchCfiMode

pmHoPrepAtt pmHoPrepSucc

IRAT Handover(HOSR)

b2Threshold1Rsrp , b2Threshold2RscpUtra , hysteresisB2 , timeToTriggerB2 , triggerQuantityB2 a2ThresholdRsrpPrim ,hysteresisA2Prim timeToTriggerA2Prim , a5B2MobilityTimer

configuration issue EPC Cause

Handover Execution Failure

pmHoExeAtt pmHoExeSucc

b2Threshold1Rsrp , b2Threshold2RscpUtra , hysteresisB2 , timeToTriggerB2 , triggerQuantityB2 a2ThresholdRsrpPrim ,hysteresisA2Prim timeToTriggerA2Prim , a5B2MobilityTimer

Check EPC configuration

Target cell load

Check load & admission control parameter of legacy network

Tune parameters HW issues

Poor Coverage

target site is disabled / sector down / software package corrupt

Frequency relation (UtranFreqRelation) , neighbor relation (ExternalUtrancell)

Audit beside mentioned parameters for IRAT HO

Check HW issues , alarms , improper cabling , connector issues , VSWR Check target cell Coverage area (legacy network)

Target cell High UL interference Wrong neighbour HW issues

Check interference issues in target cell

Check configuration parameter of neighbor cell

Check HW issues , alarms , improper cabling , connector issues , VSWR

EGI-Network Engineering- LRAN