Gsm Optimization Process
Optimization Processes
Network Optimization process involves the following activities:
•
FIRST SET THE CRITERION (GOAL) OF OPTIMIZATION PROCESS o BASELINE & TARGET KPI’s. o DELIVERABLES
• • • • •
CONDUCTING A BASELINE PHYSICAL AUDIT REMOVING ALL SERVICE AFFECTING ALARMS IDENTIFYING POOR COVERAGE AREAS IDENTIFYING CAPACITY CONSTRAINTS & OVERUTILIZED CELLS VARIOUS KPIs with Root-Cause-Analysis of problems. o o
Frequency Plan (BCCH & TCH) Neighbor plan
• •
CONDUCTING A GSM SYSTEM PARAMETERS AUDIT Deliverables of an Optimization activity: o o
Baseline Drive test comparison with post implementation results. Statistical comparison of baseline & improved network.
o Parameter Audit report. o Physical parameter inconsistencies. o Frequency & neighbor plan inconsistencies o Recommendations for
Coverage Capacity Physical Optimization Location Area Optimization.
Troubleshooting KPI’s
This sections contains information to control & optimize the following w.r.t. Nokia Systems 1. SDCCH Drop 2. SDCCH Blocking (See SD Drop) 3. TCH Drop 4. Handover Failures 5. TCH Blocking (See Handover Failure) 6. Downlink Quality 7. Uplink Quality
Probable Reasons for SD Drop
• • • • • • • • • A bis failure. Path unbalance between DL/UL caused by difference in sensitivity between BTS & MS. Co-BCCH Frequency and BSIC in the nearby BTS Cells in a Coverage area. SDCCH defined on TRX having poor path loss. High Interference level. High SD congestion. Greater Rx level access min. Due to heavy location updates on the cell. Hardware Issues.
SD Drop Check Points
1. A bis failure. a. Check PCM Errors and carry out PCM Checks on regular Basis 2. Path unbalance between DL/UL caused by difference in sensitivity between BTS & MS. 3. Co-BCCH Frequency and BSIC in the nearby BTS Cells in a Coverage area. a. Clearing ZEAT on regular Basis. All Network Effecting Alarms to be monitored for Clearance. 4. SDCCH defined on TRX having poor path loss. a. ND Report
Network Optimization process involves the following activities:
•
FIRST SET THE CRITERION (GOAL) OF OPTIMIZATION PROCESS o BASELINE & TARGET KPI’s. o DELIVERABLES
• • • • •
CONDUCTING A BASELINE PHYSICAL AUDIT REMOVING ALL SERVICE AFFECTING ALARMS IDENTIFYING POOR COVERAGE AREAS IDENTIFYING CAPACITY CONSTRAINTS & OVERUTILIZED CELLS VARIOUS KPIs with Root-Cause-Analysis of problems. o o
Frequency Plan (BCCH & TCH) Neighbor plan
• •
CONDUCTING A GSM SYSTEM PARAMETERS AUDIT Deliverables of an Optimization activity: o o
Baseline Drive test comparison with post implementation results. Statistical comparison of baseline & improved network.
o Parameter Audit report. o Physical parameter inconsistencies. o Frequency & neighbor plan inconsistencies o Recommendations for
Coverage Capacity Physical Optimization Location Area Optimization.
Troubleshooting KPI’s
This sections contains information to control & optimize the following w.r.t. Nokia Systems 1. SDCCH Drop 2. SDCCH Blocking (See SD Drop) 3. TCH Drop 4. Handover Failures 5. TCH Blocking (See Handover Failure) 6. Downlink Quality 7. Uplink Quality
Probable Reasons for SD Drop
• • • • • • • • • A bis failure. Path unbalance between DL/UL caused by difference in sensitivity between BTS & MS. Co-BCCH Frequency and BSIC in the nearby BTS Cells in a Coverage area. SDCCH defined on TRX having poor path loss. High Interference level. High SD congestion. Greater Rx level access min. Due to heavy location updates on the cell. Hardware Issues.
SD Drop Check Points
1. A bis failure. a. Check PCM Errors and carry out PCM Checks on regular Basis 2. Path unbalance between DL/UL caused by difference in sensitivity between BTS & MS. 3. Co-BCCH Frequency and BSIC in the nearby BTS Cells in a Coverage area. a. Clearing ZEAT on regular Basis. All Network Effecting Alarms to be monitored for Clearance. 4. SDCCH defined on TRX having poor path loss. a. ND Report