ACCESSABILITY-L14B
Contention Based random Access (CBRA)
Random Access
Contension Free Random Access (CFRA)
pmRaAttCbra , pmRaSuccCbra
pmRaFailCbraMsg2Disc , pmRaFailCbraMsg1DiscOoc
pmRaFailCbraMsg1DiscSched
pmRaAttCfra
pmRaSuccCfra
pmRaFailCfraMsg2Disc
pmRaAllocCfra
pmRaUnassignedCfraFalse
pmRaUnassignedCfraSum
pmRaFailCfraMsg1DiscOoc
pmRaFailCfraMsg1DiscSched
rachRootSequence , cellRange
qRxLevMin , preambleInitialReceivedTargetPower
powerRampingStep (Hardcoded) , preambleTransMax (Hardcoded)
numberOfRA-Preambles (Hardcoded)
rachRootSequence , cellRange
qRxLevMin , preambleInitialReceivedTargetPower
powerRampingStep (Hardcoded) , preambleTransMax (Hardcoded)
numberOfRA-Preambles (Hardcoded)
MP load
Improve RF conditions (by parameters or physical optimization (tilt/azimuth/antenna height))
Check RSI planning (ex. For 15km cell range, diff of 10 between 2 neighbours)
Tune RACH related parameters , also check symptoms for sleeping cell (mentioned below)
Improve RF conditions (by parameters or physical optimization (tilt/azimuth/antenna height))
Check RSI planning (ex. For 15km cell range, diff of 10 between 2 neighbours)
Tune RACH related parameters , also check symptoms for sleeping cell (mentioned below)
pmRrcConnEstabFailHighLoad (MP load control)
pmRrcConnEstabFailOverload (procedure latency supervision)
pmActiveUeDlSum
pmActiveUeDlSectorCarrierDistr
pmActiveUeDlMax
pmActiveUeDlSumQci
pmActiveUeUlSum
pmActiveUeUlMax
pmActiveUeUlSectorCarrierDistr
pmActiveUeUlSumLcg
Capacity cause
pmRrcConnEstabFailActiveUserLicenseExceeded
License
Poor DL SINR (CQI)
pmRrcConnEstabFailFailureInRadioProcedure
Coverage issues
UL RSSI
RRC connection
pmRrcConnEstabAtt
(pmRrcConnEstabAttDta , pmRrcConnEstabAttEm
pmRrcConnEstabAttHpa , pmRrcConnEstabAttMod
pmRrcConnEstabAttMos , pmRrcConnEstabAttMta)
pmRrcConnEstabAttReatt
(pmRrcConnEstabAttReattDta , pmRrcConnEstabAttReattEm
pmRrcConnEstabAttReattHpa , pmRrcConnEstabAttReattMod
pmRrcConnEstabAttReattMos , pmRrcConnEstabAttReattMta)
pmRrcConnEstabSucc
(pmRrcConnEstabSuccDta , pmRrcConnEstabSuccEm
pmRrcConnEstabSuccHpa , pmRrcConnEstabSuccMod
pmRrcConnEstabSuccMos , pmRrcConnEstabSuccMta)
pmRrcConnReestFailLicMtReest
pmRadioRecInterferencePwr
pmRadioRecInterferencePwrPucch
pmRadioRecInterferencePwrPrb1~100
pmSinrPucchDistr , pmSinrPuschDistr
pZeroNominalPucch
pZeroNominalPusch
pmRrcConnEstabFailUnspecified
noOfPucchCqiUsers , noOfPucchSrUsers , pdcchCfiMode
tInactivityTimer , qRxLevMin , dlMaxRetxThreshold
ulMaxRetxThreshold , qOffsetcellEUtran
SchedulingAlgorithm , crsGain
pmPrbUtilDl
pmPrbUtilUl
pmRrcConnEstabFailMmeOvlMos
pmRrcConnEstabFailMmeOvlMod
Cell Down Auto
eNodeB Cause
pmCellDowntimeAuto
pmCellDownLockAuto
Cell Down Manually
Availability
Other checks
Sleeping Cell
Alarms
TN issue
Check Eutrancelltdd MO cell selection and reselection parameters & 3G&2G cell reselection parameter/feature
Check Cell Barred , acBarring for different scenarios
Check MME signalling dimensioning
Check S1 interface , S1 links down due to faulty interface board
Configure Correct TAC as per planning & ensure correct TAC LAC Mapping
Cell trace and check with Core Engineer
dlNonGbrRatio , dlTransNwBandwidth
Tune Dynamic GBR Admission Control related parameter
pmErabEstabFailGbrUlEnb
ulNonGbrRatio , ulTransNwBandwidth
Tune Dynamic GBR Admission Control related parameter
pmErabEstabFailAddedLic
pmErabEstabFailInitLic
pmErabModFailLic
Coverage issues
UL RSSI
Check license & Feature state of Multiple Radio Bearer per user or RLC UM
Check license & Feature state of Multiple Radio Bearer per user or RLC UM
Lack of license of Dynamic QoS Modification
pmRadioUeRepCqiDistr
pmRadioUeRepCqiDistr2
maximumTransmissionPower
partOfSectorPower
confOutputPower
crsGain
pdschTypeBGain
Tune related parameters (as mentioned beside) , Audit cell reselection parameters
Physical optimization (Tilt , Azimuth , height of antenna)
Identify overshooting cells causing interference in DL
pmBadCovEvalReport
pmRadioTbsPwrRestricted
pmBadCovSearchEvalReport
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) also Check if there is scope of new site
Poor DL SINR (CQI)
ERAB ESTABLISHMENT
Check SectorEquipmentFunction:ConfiguredOutputPower & Eutrancelltdd:partOfSectorPower
Idle mode parameter issue
pmErabEstabFailGbrDlEnb
License
PmErabEstabAttInit
(pmErabEstabAttInitArp , pmErabEstabAttInitPa)
PmErabEstabSuccInit.
(pmErabEstabSuccInitArp , pmErabEstabSuccInitPa)
PmErabEstabAttAdded
(pmErabEstabAttAddedArp , pmErabEstabAttAddedPa)
PmErabEstabSuccAdded
(pmErabEstabSuccAddedArp , pmErabEstabSuccAddedPa)
pmErabEstabAttAddedHoOngoing
pmErabEstabAttAddedHoOngoingArp
Power setting issue
Cell Barred
TAC wrong configure & LAC-TAC mapping
CN abnormal release
PM Counter
Radio Cause
Operation Cause
Faulty TMA Connections & faulty settings
pmS1SigConnEstabFailMmeOvlMos
Other Checks
pmRadioRecInterferencePwr
pmRadioRecInterferencePwrPucch
pmRadioRecInterferencePwrPrb1~100
pmSinrPucchDistr , pmSinrPuschDistr
pZeroNominalPucch
pZeroNominalPusch
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..)
Configuration issues
Cell Down Auto
Cell down
pmCellDowntimeAuto
pmCellDownLockAuto
eNodeB Cause
Cell Down Manually
Availability
HW Cause
Sleeping Cell
pmCellDowntimeMan
pmCellDownLockMan
S1 issues
Operation Cause
trace from MSG1 to MSG5 , verify symtoms for sleeping cells
Power setting issue
Check SectorEquipmentFunction:ConfiguredOutputPower & Eutrancelltdd:partOfSectorPower
Idle mode parameter issue
Cell Barred
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)
Catch Trace(Baseband)
Configuration issue
Baseband Trace can be used , te enable all bbmcBbOmMeSwU
pmErabRelAbnormalEnbActTnFail
check for alarms like Service Unavailable(S1 connection failure) , Ip packet loss "above" SGW
Verify symtoms for sleeping cell
Operation issues
VSWR
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)
pmRaAttCbra
pmRaSuccCbra
pmRaFailCbraMsg2Disc
pmRaAttCfra
pmRaSuccCfra
pmRaFailCfraMsg2Disc
pmRaAllocCfra
pmRrcConnEstabAtt
pmRrcConnSucc
Non-access issue
Alarms
Auto Restart
Baseband Startup issue
Transport Cause
EPC Cause
Other checks
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)
CABX , verify VSWR on all ports of antenna
TMA check
S1 SIGNALLING CONNECTION
Baseband Trace can be used , te enable all bbmcBbOmMeSwU
pmErabRelAbnormalEnbActTnFail
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.
HW Cause
VSWR
S1 issues
check for alarms like Service Unavailable(S1 connection failure) , Ip packet loss "above" SGW
trace from MSG1 to MSG5 , verify symtoms for sleeping cells
Operation issues
PmS1SigConnEstabAtt
(pmS1SigConnEstabAttHpa , pmS1SigConnEstabAttMod
pmS1SigConnEstabAttMta , pmS1SigConnEstabAttMos
pmS1SigConnEstabAttDta , pmS1SigConnEstabAttEm)
PmS1SigConnEstabSucc
(pmS1SigConnEstabSuccEm , pmS1SigConnEstabSuccHpa
pmS1SigConnEstabSuccMod , pmS1SigConnEstabSuccMta
pmS1SigConnEstabSuccMos , pmS1SigConnEstabSuccDta)
ensure proper configuration , especially for all new site which are integrated recently
Verify symptoms for sleeping cell
Configuration issue
Non-access issue
Action Plan
SRB admission control
Tune parameters mentioned aside
Physical changes (Tilt , Azimuth , height of antenna)
Tune cell reselection parameters
Ensure the eNodeB structure of the restart, MP、Baseband or RRU
lh all llog -l (do complete eNB health checkup)
Baseband Startup issue
pmCellDowntimeMan
pmCellDownLockMan
pmRaAttCbra
pmRaSuccCbra
pmRaFailCbraMsg2Disc
pmRaAttCfra
pmRaSuccCfra
pmRaFailCfraMsg2Disc
pmRaAllocCfra
pmRrcConnEstabAtt
pmRrcConnSucc
Trace(Baseband)
SSSR (Session setup sucess rate)
Counter
Auto Restart
Transport Cause
EPC Cause
Parameters
Tune parameters mentioned aside
Physical changes (Tilt , Azimuth , height of antenna)
Tune cell reselection parameters to offload traffic to nearby cells
Check parameters related to MME Overload Control feature & MME Dimensioning
Cell down
Legend
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..)
pdcchAdmThreshold , noOfPucchCqiUsers , noOfPucchSrUsers
pdcchCfiMode , tInactivityTimer , qRxLevMin
dlMaxRetxThreshold , ulMaxRetxThreshold
qOffsetcellEUtran , SchedulingAlgorithm , crsGain
PmPdcchCceUtil
Configuration issues
LTE KPI
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) also Check if there is scope of new site
If there are more then 1 carrier optimize load balancing parameter
Optimize tilt/azimuth/antenna height to balance traffic from near by sites
check for alarms or other hardware issues
Low number of attempt
Accessability
Tune related parameters (as mentioned beside) , Physical optimization (Tilt , Azimuth , height of antenna
Identify overshooting cells causing interference in DL , Audit cell reselection parameters
Mainly pegged due to eNB issues
pmRrcConnEstabFailBearerAdmissionRej
(SRB admission control)
MME overload
maximumTransmissionPower
partOfSectorPower
confOutputPower
crsGain
pdschTypeBGain
Upgrade license for number of connected users
Physical changes (Tilt , Azimuth , height of antenna)
Tune parameters as mentioned beside.
pegged due to lack of license of feature Multi-Target RRC Connection Reestablishment
pmRrcConnEstabFailLackOfResources
Other Causes
maximumTransmissionPower
partOfSectorPower
confOutputPower
crsGain
pdschTypeBGain
Tune parameters as mentioned beside.
Physical changes (Tilt , Azimuth , height of antenna)
Reduce size of TA , reduces no. of cells being paged so reduces the CPU load in the MP.
MP capacity of DUS is higher than DUL , to increase MP capacity DUL can be replaced by DUS
Reduce no. of HO by physical opti or features (UE Level Oscillating Handover Minimization & Automated Mobility Optimization
Tune cell reselection parameters to offload traffic to nearby cells
Tune parameters mentioned aside
Physical changes (Tilt , Azimuth , height of antenna)
Tune cell reselection parameters to offload traffic to nearby cells
noOfPucchCqiUsers , noOfPucchSrUsers , pdcchCfiMode
tInactivityTimer , dlMaxRetxThreshold , ulMaxRetxThreshold
qOffsetcellEUtran , qRxLevMin , SchedulingAlgorithm , crsGain
pmRadioUeRepCqiDistr , pmRadioUeRepCqiDistr2
pmBadCovEvalReport
pmRadioTbsPwrRestricted
pmBadCovSearchEvalReport
noOfPucchCqiUsers , noOfPucchSrUsers , pdcchCfiMode
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
tInactivityTimer , dlMaxRetxThreshold , ulMaxRetxThreshold
qOffsetcellEUtran , qRxLevMin , SchedulingAlgorithm , crsGain
pmLicConnectedUsersLicense , pmLicConnectedUsersTimeCong
pmLicConnectedUsersHardLimit , pmLicConnectedUsersActual
pmLicConnectedUsersDistr
pmRrcConnEstabFailLic
Radio Cause
pmRrcConnMax , pmRrcConnLevSum
pmProcessorCoreLoad , pmProcessorLoad
pmProcessorLoadDistr
Check Eutrancelltdd MO cell selection and reselection parameters & 3G&2G cell reselection parameter/feature
Check Cell Barred , acBarring for different scenarios
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.
CABX , verify VSWR on all ports of antenna
TMA check
Faulty TMA Connections & faulty settings
EGI-Network Engineering- LRAN