RF Tuning Guide

[torex]

Content:

1 Introduction to RF Optimization 10
1.1 Contents of RF Optimization 10
1.2 Document Structure 10
2 Basic Processes for RF Optimization 12
2.1 Flow Chat of RF Optimization 13
2.2 Detailed Sections of RF Optimization 14
2.2.1 Test Preparations 14
2.2.2 Data Collection 15
2.2.3 Problem Analysis 15
3 Test Preparations 16
3.1 Deciding Optimization Goal 16
3.2 Dividing Clusters 18
3.3 Deciding Test Route 19
3.4 Preparing Tools and Data 20
3.4.1 Preparing Software 20
3.4.2 Preparing Hardware 20
3.4.3 Preparing Data 21
4 Data Collection 22
4.1 Drive Test 22
4.1.1 DT Types 22
4.1.2 Setting DT Indexes 23
4.2 Indoor Test 25
4.3 Collecting RNC Configuration Data 25
5 Coverage Problem Analysis 27
5.1 Coverage Problem Types 27
5.1.1 Weak coverage 27
5.1.2 Cross-cell Coverage 30
5.1.3 Unbalanced Uplink and Downlink 31
5.1.4 No Primary Pilot 31
5.2 Coverage Analysis Processes 32
5.2.1 Downlink Coverage Analysis 32
5.2.2 Uplink Coverage Analysis 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 38
5.3.3 Coverage Restriction Due to Improper Installation of Antennas 39
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 Process for Analyzing Pilot Pollution Problem 41
6.3 Causes and Influence Analysis 42
6.3.1 Causes Analysis 42
6.3.2 Influence Analysis 43
6.4 Solutions to Pilot Pollution 44
6.4.1 Antenna Adjustment 44
6.4.2 PICH Power Adjustment 45
6.4.3 Using RRU and BBU 46
6.5 Optimization Cases for Eliminating Pilot Pollution 48
6.5.1 Data Analysis before Optimization 48
6.5.2 Data Analysis after Optimization 52
7 Handover Problem Analysis 55
7.1 Neighbor Cell Optimization 55
7.1.1 DT Data Analysis 55
7.1.2 Removing Redundant Neighbor Cells 59
7.2 SHO Factor based on DT Analysis 60
7.2.1 Definition of SHO Factor based on DT 60
7.2.2 General Principles and Methods in Optimization 60
8 Adjustment Methods 62
9 Summary