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
