How to Improve Accessibility UMTS Nokia Summarized by Local Optim
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Accessibility Success Rate Definition •
KPI DEFINITION : (Number of Call Established– Number of Call Fails) / Number of Call Attempts
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FORMULA: CSSR CS Voice (%) = 100*Sum(MOC_CONV_CALL_ATTSMOC_CONV_CALL_FAILS+MTC_CONV_CALL_ATTSMTC_CONV_CALL_FAILS+EMERGENCY_CALL_ATTSEMERGENCY_CALL_FAILS)/Sum(MOC_CONV_CALL_ATTS +MTC_CONV_CALL_ATTS+EMERGENCY_CALL_ATTSRRC_ATT_REP_MO_CONV-RRC_ATT_REP_MT_CONVRRC_ATT_REP_EMERGENCY)*Sum(RAB_ACC_COMP_CS_ VOICE)/Sum(RAB_STP_ATT_CS_VOICE) HSDPA Accessibility Success Rate (%) = 100*Sum(ALLO_HS_DSCH_FLOW_INT+ALLO_HS_DSCH_FL OW_BGR)/Sum(ALLO_HS_DSCH_FLOW_INT+ALLO_HS_DS CH_FLOW_BGR+REJ_HS_DSCH_RET_INT+REJ_HS_DSCH _RET_BGR+SETUP_FAIL_RNC_HS_DSCH_INT+SETUP_FAI L_BTS_HS_DSCH_INT+SETUP_FAIL_IUB_HS_TOTAL_INT+ SETUP_FAIL_RNC_HS_DSCH_BGR+SETUP_FAIL_BTS_HS _DSCH_BGR+SETUP_FAIL_IUB_HS_TOTAL_BGR)
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MESSAGE FLOW Network and Service Quality Management
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Accessibility Cause Failure
* Experienced during project
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Setup Failures caused by AC and/or UL DCH
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Case: Accessibility due AC / UL DCH Issue: Low HSDPA Accessibility SR in some wcel due to UL DCH fails
Issue: Low AMR CSSR in some wcel due to AC fails
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Action 1. Investigation ïƒ High HSDPA Setup Fail UL DCH Fails 2. Troubleshooting
1. Parameter adjustment for PrxTarget, PrxMaxTargetBTS, PrxTargetPSMax, PrxTargetPSMin, PrxNoise and PrxloadMarginDCH
2. BTS Hardware and Software troubleshooting
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Performance After Execution (HSDPA Acc.) AC fails Parameter Adjustment
CRF Executed
CRF Executed
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Performance After Execution (AMR CSSR) AC fails Parameter Adjustment
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Performance After Execution (BTS SW and HW) high UL Noise Floor CR Executed
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Setup Failures caused by BTS Fails
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Case: Accessibility due to BTS Issue: Low Accessibility HSDPA
SR and R99 in some wcel due to BTS fails
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Action 1. Investigation ďƒ High Setup Fail due to BTS Fails 2. Troubleshooting 1. Need CE Hardware Troubleshooting
2. Need Site Troubleshooting (re-commisioning and/or reset) 3. Need alarm clearance
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Performance After Execution (BTS fails due to CE) CRF Executed
CRF Executed
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Performance After Execution (BTS fails due to Alarm) CRF Executed
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Performance After Execution (BTS Troubleshooting) Site Re-commisioning and/or reset CRF Executed
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Setup Failures caused by Max User Fails
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Case: Accessibility due to Max Users Issue: Low Accessibility HSDPA and R99 SR in some wcel due to Max User fails
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Action 1. Investigation ďƒ High HSDPA Setup Fail due to Max Users Fails 2. Troubleshooting 1. Need Site Troubleshooting (re-commisioning and/or reset) 2. Need alarm clearance
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Performance After Execution (Max Users) with recommisioning
CRF Executed
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Performance After Execution (Max Users) with alarm clearance CRF Executed
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Setup Failures caused by RNC Fails
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Case: Accessibility due to RNC fails Issue: Low Accessibility HSDPA and R99 SR in some wcel due to RNC fails
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Action 1. Investigation ďƒ High HSDPA Setup Fail due to RNC Fails 2. Troubleshooting 1. Need alarm clearance (RNC internal and wbts transmission) 2. Need Site Troubleshooting (re-commisioning and/or reset)
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Performance After Execution (RNC fails) with Alarm clearance CRF Executed
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Performance After Execution (BTS Troubleshooting) Site Re-commisioning and/or reset CRF Executed
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Performance After Execution (RNC internal) with Alarm clearance
CRF Executed
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Setup Failures caused by Transmission Fails
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Case: Accessibility due to Transmission fails Issue: Low Accessibility HSDPA and R99 SR in some wcel due to Transmission fails
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Action 1. Investigation ďƒ High Setup Fail due to IuB Fails 2. Troubleshooting 1. Need alarm clearance (wbts transmission) 2. Upgrade IuB capacity 3. CoCo Reconfiguration or feature implementation
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Performance After Execution (IuB fails) with Alarm clearance CRF Executed
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Performance After Execution (IuB fails) CRF Executed
CRF Executed
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Performance After Execution (IuB fails due to Alarm) CRF Executed
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Setup Failures caused by UE Fails
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Case: Accessibility due to UE fails Issue: Low Accessibility Voice AMR SR in some wcel due to UE fails
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Action 1. Investigation ďƒ High AMR voice Setup Fail due to UE Fails 2. Troubleshooting 1. Need alarm clearance 2. ADJx tuning 3. Other failures correlation (BTS, AC and IuB)
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Performance After Execution (UE fails)
CRF Executed
CRF Executed
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Thank You
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