qualcomm
2011-07-02, 10:17 PM
Chapter 1 Introduction to RF Optimization............................................................................. 10
1.1 Contents of RF Optimization....................................................................................... 10
1.2 Document Structure.................................................................................................... 10
Chapter 2 Basic Processes for RF Optimization..................................................................... 12
2.1 Flow Chat of RF Optimization...................................................................................... 12
2.2 Detailed Sections of RF Optimization.......................................................................... 13
2.2.1 Test Preparations.............................................................................................. 13
2.2.2 Data Collection................................................................................................. 14
2.2.3 Problem Analysis.............................................................................................. 14
Chapter 3 Test Preparations................................................................................................... 16
3.1 Deciding Optimization Goal......................................................................................... 16
3.2 Dividing Clusters........................................................................................................ 20
3.3 Deciding Test Route................................................................................................... 21
3.4 Preparing Tools and Data............................................................................................ 22
3.4.1 Preparing Software........................................................................................... 22
3.4.2 Preparing Hardware........................................................................................... 22
3.4.3 Preparing Data.................................................................................................. 23
Chapter 4 Data Collection....................................................................................................... 24
4.1 Drive Test................................................................................................................... 25
4.1.1 DT Types.......................................................................................................... 25
4.1.2 Setting DT Indexes............................................................................................ 25
1) Start Genex Probe 1.3 software....................................................................................... 25
2) Select Configuration > System Config > Test Plan.......................................................... 25
3) Set DT indexes as shown in Figure 4-1............................................................................ 25
Figure 4-1 Setting DT................................................................................................................ 25
4.2 Indoor Test................................................................................................................. 26
4.3 Collecting RNC Configuration Data.............................................................................. 26
Chapter 5 Coverage Problem Analysis................................................................................... 28
5.1 Coverage Problem Types............................................................................................ 28
5.1.1 Weak coverage................................................................................................. 28
5.1.2 Cross-cell Coverage.......................................................................................... 29
5.1.3 Unbalanced Uplink and Downlink........................................................................ 30
5.1.4 No Primary Pilot................................................................................................ 30
5.2 Coverage Analysis Processes..................................................................................... 31
5.2.1 Downlink Coverage Analysis.............................................................................. 31
5.2.2 Uplink Coverage Analysis.................................................................................. 34
Figure 5-4 Distribution of UE transmit power.............................................................................. 35
5.3 Coverage Problem Cases............................................................................................ 36
5.3.1 Weak Coverage Cases Due to Improper Engineering Parameters......................... 36
5.3.2 Cross-cell Coverage Due to Improper NodeB Location........................................ 37
5.3.3 Coverage Restriction Due to Improper Installation of Antennas............................ 39
Chapter 6 Pilot Pollution Problem Analysis........................................................................... 41
6.1 Pilot Pollution Definition and Judgment Standards....................................................... 41
6.1.1 Definition.......................................................................................................... 41
6.1.2 Judgment Standards......................................................................................... 41
6.2 Causes and Influence Analysis.................................................................................... 41
6.2.1 Causes Analysis............................................................................................... 41
6.2.2 Influence Analysis............................................................................................. 43
6.3 Solutions to Pilot Pollution.......................................................................................... 44
6.3.1 Antenna Adjustment.......................................................................................... 44
6.3.2 PICH Power Adjustment.................................................................................... 45
6.3.3 Using RRU or Micro Cells.................................................................................. 46
6.4 Process for Analyzing Pilot Pollution Problem.............................................................. 48
6.5 Optimization Cases for Eliminating Pilot Pollution......................................................... 49
6.5.1 Data Analysis before Optimization..................................................................... 49
6.5.2 Data Analysis after Optimization........................................................................ 54
Chapter 7 Handover Problem Analysis................................................................................... 56
7.1 Neighbor Cell Optimization.......................................................................................... 56
7.1.1 DT Data Analysis.............................................................................................. 56
7.1.2 Removing Redundant Neighbor Cells................................................................. 61
7.2 SHO Factor based on DT Analysis.............................................................................. 62
7.2.1 Definition of SHO Factor based on DT............................................................... 62
7.2.2 General Principles and Methods in Optimization.................................................. 62
Chapter 8 Adjustment Methods.............................................................................................. 64
Chapter 9 Summary............................................................................................................... 65
Chapter 10 Appendix: Coverage Enhancement Technologies................................................. 66
10.1 Coverage-enhancing Technologies............................................................................. 66
10.1.1 TMAs.............................................................................................................. 66
10.1.2 Receive and Transmit Diversity........................................................................ 66
10.1.3 RRU............................................................................................................... 66
10.1.4 Micro Cells...................................................................................................... 66
References:............................................................................................................................ 68
(PS: qualcomm)
1.1 Contents of RF Optimization....................................................................................... 10
1.2 Document Structure.................................................................................................... 10
Chapter 2 Basic Processes for RF Optimization..................................................................... 12
2.1 Flow Chat of RF Optimization...................................................................................... 12
2.2 Detailed Sections of RF Optimization.......................................................................... 13
2.2.1 Test Preparations.............................................................................................. 13
2.2.2 Data Collection................................................................................................. 14
2.2.3 Problem Analysis.............................................................................................. 14
Chapter 3 Test Preparations................................................................................................... 16
3.1 Deciding Optimization Goal......................................................................................... 16
3.2 Dividing Clusters........................................................................................................ 20
3.3 Deciding Test Route................................................................................................... 21
3.4 Preparing Tools and Data............................................................................................ 22
3.4.1 Preparing Software........................................................................................... 22
3.4.2 Preparing Hardware........................................................................................... 22
3.4.3 Preparing Data.................................................................................................. 23
Chapter 4 Data Collection....................................................................................................... 24
4.1 Drive Test................................................................................................................... 25
4.1.1 DT Types.......................................................................................................... 25
4.1.2 Setting DT Indexes............................................................................................ 25
1) Start Genex Probe 1.3 software....................................................................................... 25
2) Select Configuration > System Config > Test Plan.......................................................... 25
3) Set DT indexes as shown in Figure 4-1............................................................................ 25
Figure 4-1 Setting DT................................................................................................................ 25
4.2 Indoor Test................................................................................................................. 26
4.3 Collecting RNC Configuration Data.............................................................................. 26
Chapter 5 Coverage Problem Analysis................................................................................... 28
5.1 Coverage Problem Types............................................................................................ 28
5.1.1 Weak coverage................................................................................................. 28
5.1.2 Cross-cell Coverage.......................................................................................... 29
5.1.3 Unbalanced Uplink and Downlink........................................................................ 30
5.1.4 No Primary Pilot................................................................................................ 30
5.2 Coverage Analysis Processes..................................................................................... 31
5.2.1 Downlink Coverage Analysis.............................................................................. 31
5.2.2 Uplink Coverage Analysis.................................................................................. 34
Figure 5-4 Distribution of UE transmit power.............................................................................. 35
5.3 Coverage Problem Cases............................................................................................ 36
5.3.1 Weak Coverage Cases Due to Improper Engineering Parameters......................... 36
5.3.2 Cross-cell Coverage Due to Improper NodeB Location........................................ 37
5.3.3 Coverage Restriction Due to Improper Installation of Antennas............................ 39
Chapter 6 Pilot Pollution Problem Analysis........................................................................... 41
6.1 Pilot Pollution Definition and Judgment Standards....................................................... 41
6.1.1 Definition.......................................................................................................... 41
6.1.2 Judgment Standards......................................................................................... 41
6.2 Causes and Influence Analysis.................................................................................... 41
6.2.1 Causes Analysis............................................................................................... 41
6.2.2 Influence Analysis............................................................................................. 43
6.3 Solutions to Pilot Pollution.......................................................................................... 44
6.3.1 Antenna Adjustment.......................................................................................... 44
6.3.2 PICH Power Adjustment.................................................................................... 45
6.3.3 Using RRU or Micro Cells.................................................................................. 46
6.4 Process for Analyzing Pilot Pollution Problem.............................................................. 48
6.5 Optimization Cases for Eliminating Pilot Pollution......................................................... 49
6.5.1 Data Analysis before Optimization..................................................................... 49
6.5.2 Data Analysis after Optimization........................................................................ 54
Chapter 7 Handover Problem Analysis................................................................................... 56
7.1 Neighbor Cell Optimization.......................................................................................... 56
7.1.1 DT Data Analysis.............................................................................................. 56
7.1.2 Removing Redundant Neighbor Cells................................................................. 61
7.2 SHO Factor based on DT Analysis.............................................................................. 62
7.2.1 Definition of SHO Factor based on DT............................................................... 62
7.2.2 General Principles and Methods in Optimization.................................................. 62
Chapter 8 Adjustment Methods.............................................................................................. 64
Chapter 9 Summary............................................................................................................... 65
Chapter 10 Appendix: Coverage Enhancement Technologies................................................. 66
10.1 Coverage-enhancing Technologies............................................................................. 66
10.1.1 TMAs.............................................................................................................. 66
10.1.2 Receive and Transmit Diversity........................................................................ 66
10.1.3 RRU............................................................................................................... 66
10.1.4 Micro Cells...................................................................................................... 66
References:............................................................................................................................ 68
(PS: qualcomm)