ryuzaki_steven
2012-02-22, 07:31 PM
with a lot of hassle now i present the optimization doc of lte from nsn :)
content:
1 Scope ........................................................................................................ 5
2 Role of SON within LTE Networks‟ Optimization ........................................ 6
2.1 Optimization related SON features in RL10 ............................................................................. 8
2.2 NetAct Optimizer ..................................................................................................................... 9
2.3 Conclusions about SON and Optimization ............................................................................. 10
3 Optimization Process ............................................................................... 12
3.1 Project Delivery process ........................................................................................................ 12
3.2 Overview ............................................................................................................................... 14
3.3 Optimization Process ............................................................................................................. 15
3.4 Drive Test Optimization ......................................................................................................... 17
3.4.1 Parameter audits ................................................................................................................ 18
3.4.2 KPI Health Check ............................................................................................................... 19
3.4.3 Drive Test and Data Analysis .............................................................................................. 19
3.4.4 Reporting ............................................................................................................................ 19
3.5 Counter Based Optimization .................................................................................................. 20
3.5.1 Counter based optimization process ................................................................................... 21
4 Measurement and Optimization Tools ...................................................... 22
4.1 Drive Test Tools .................................................................................................................... 22
4.2 Analysis Tools ....................................................................................................................... 24
4.3 Scanners ............................................................................................................................... 24
5 Optimization Items ................................................................................... 26
5.1 Basic RF Optimization ........................................................................................................... 26
5.1.1 Tilts and Azimuths .............................................................................................................. 26
5.1.2 Cross feeders ..................................................................................................................... 29
5.1.3 Interfering Cells .................................................................................................................. 32
5.2 Parameters tuning ................................................................................................................. 33
5.2.1 Random Access ................................................................................................................. 33
5.2.2 Radio Admission Control .................................................................................................... 44
5.2.3 LTE Mobility Management .................................................................................................. 44
5.2.4 MIMO Mode Control ........................................................................................................... 47
5.2.5 UL and DL Scheduler ......................................................................................................... 52
5.2.6 DRX /DTX Management, Paging ........................................................................................ 55
5.2.7 Power Control ..................................................................................................................... 56
5.3 Average Throughput Optimization ......................................................................................... 65
5.3.1 DL Throughput Optimization ............................................................................................... 66
5.3.2 UL Throughput Optimization ............................................................................................... 69
5.4 Worse case (cell edge) DL and UL throughput (coverage) .................................................... 76
5.5 DL and UL Control Channels Capacity .................................................................................. 77
5.5.1 Downlink Control channel capacity ..................................................................................... 77
5.5.2 Uplink Control Channel (PUCCH) Capacity ........................................................................ 81
5.6 Number of simultaneous users (inactivity timer, licensing) ..................................................... 90
5.7 Link adaptation – BLER target ............................................................................................... 91
5.8 Neighbour and Handover Optimization .................................................................................. 92
5.8.1 Automatic Neighbour Relation (ANR) within NSN ............................................................... 92
5.8.2 Neighbour relationships: Blacklisting and whitelisting ......................................................... 95
5.8.3 HO Optimization ................................................................................................................. 97
5.9 Latency Optimization ........................................................................................................... 104
5.10 Uplink Reference Signal Planing/Optimization ................................................................... 111
5.10.1 Reference Signal Sequence ........................................................................................... 111
5.10.2 Need for Planning/Optimizing ......................................................................................... 112
5.10.3 Sequence Group Planning Recommendation ................................................................. 116
6 Counters and KPI monitoring ................................................................. 117
6.1 Overview of main counters and KPIs ................................................................................... 117
6.2 Tools: NetAct Reporter ........................................................................................................ 117
7 Monitoring and tools ............................................................................... 119
8 Troubleshooting cases ........................................................................... 123
8.1 Low FTP download throughput ............................................................................................ 123
8.2 Impact of inter-cell interference in UE peak throughput ....................................................... 124
8.3 Extensive PRACHs because of PRACH misconfiguration ................................................... 126
9 Signalling Flows ..................................................................................... 130
10 References .......................................................................................... 138
11 Glossary .............................................................................................. 140
content:
1 Scope ........................................................................................................ 5
2 Role of SON within LTE Networks‟ Optimization ........................................ 6
2.1 Optimization related SON features in RL10 ............................................................................. 8
2.2 NetAct Optimizer ..................................................................................................................... 9
2.3 Conclusions about SON and Optimization ............................................................................. 10
3 Optimization Process ............................................................................... 12
3.1 Project Delivery process ........................................................................................................ 12
3.2 Overview ............................................................................................................................... 14
3.3 Optimization Process ............................................................................................................. 15
3.4 Drive Test Optimization ......................................................................................................... 17
3.4.1 Parameter audits ................................................................................................................ 18
3.4.2 KPI Health Check ............................................................................................................... 19
3.4.3 Drive Test and Data Analysis .............................................................................................. 19
3.4.4 Reporting ............................................................................................................................ 19
3.5 Counter Based Optimization .................................................................................................. 20
3.5.1 Counter based optimization process ................................................................................... 21
4 Measurement and Optimization Tools ...................................................... 22
4.1 Drive Test Tools .................................................................................................................... 22
4.2 Analysis Tools ....................................................................................................................... 24
4.3 Scanners ............................................................................................................................... 24
5 Optimization Items ................................................................................... 26
5.1 Basic RF Optimization ........................................................................................................... 26
5.1.1 Tilts and Azimuths .............................................................................................................. 26
5.1.2 Cross feeders ..................................................................................................................... 29
5.1.3 Interfering Cells .................................................................................................................. 32
5.2 Parameters tuning ................................................................................................................. 33
5.2.1 Random Access ................................................................................................................. 33
5.2.2 Radio Admission Control .................................................................................................... 44
5.2.3 LTE Mobility Management .................................................................................................. 44
5.2.4 MIMO Mode Control ........................................................................................................... 47
5.2.5 UL and DL Scheduler ......................................................................................................... 52
5.2.6 DRX /DTX Management, Paging ........................................................................................ 55
5.2.7 Power Control ..................................................................................................................... 56
5.3 Average Throughput Optimization ......................................................................................... 65
5.3.1 DL Throughput Optimization ............................................................................................... 66
5.3.2 UL Throughput Optimization ............................................................................................... 69
5.4 Worse case (cell edge) DL and UL throughput (coverage) .................................................... 76
5.5 DL and UL Control Channels Capacity .................................................................................. 77
5.5.1 Downlink Control channel capacity ..................................................................................... 77
5.5.2 Uplink Control Channel (PUCCH) Capacity ........................................................................ 81
5.6 Number of simultaneous users (inactivity timer, licensing) ..................................................... 90
5.7 Link adaptation – BLER target ............................................................................................... 91
5.8 Neighbour and Handover Optimization .................................................................................. 92
5.8.1 Automatic Neighbour Relation (ANR) within NSN ............................................................... 92
5.8.2 Neighbour relationships: Blacklisting and whitelisting ......................................................... 95
5.8.3 HO Optimization ................................................................................................................. 97
5.9 Latency Optimization ........................................................................................................... 104
5.10 Uplink Reference Signal Planing/Optimization ................................................................... 111
5.10.1 Reference Signal Sequence ........................................................................................... 111
5.10.2 Need for Planning/Optimizing ......................................................................................... 112
5.10.3 Sequence Group Planning Recommendation ................................................................. 116
6 Counters and KPI monitoring ................................................................. 117
6.1 Overview of main counters and KPIs ................................................................................... 117
6.2 Tools: NetAct Reporter ........................................................................................................ 117
7 Monitoring and tools ............................................................................... 119
8 Troubleshooting cases ........................................................................... 123
8.1 Low FTP download throughput ............................................................................................ 123
8.2 Impact of inter-cell interference in UE peak throughput ....................................................... 124
8.3 Extensive PRACHs because of PRACH misconfiguration ................................................... 126
9 Signalling Flows ..................................................................................... 130
10 References .......................................................................................... 138
11 Glossary .............................................................................................. 140