005 Wcdma Utran Optimization Flow Issue1
-
Upload
master098765 -
Category
Documents
-
view
233 -
download
0
Transcript of 005 Wcdma Utran Optimization Flow Issue1
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 1/76
HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
www.huawei.com
Internal
OWJ200101 WCDMA
UTRAN Optimization Flow
ISSUE 1.0
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 2/76
HUAWEI TECHNOLOGIES CO., LTD. Page 1All rights reserved
WCDMA optimization is a very important
part in the life of the network.
Mainly, the optimization contents the
preparation, single site verification, RF
optimization, parameters optimization.
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 3/76
HUAWEI TECHNOLOGIES CO., LTD. Page 2All rights reserved
Chapter 1 Introduction of Optimization FlowChapter 1 Introduction of Optimization Flow
Chapter 2 The preparation for the Optimization ProjectChapter 2 The preparation for the Optimization Project
Chapter 3 Single Site VerificationChapter 3 Single Site Verification
Chapter 4 RF OptimizationChapter 4 RF Optimization
Chapter 5 Parameters OptimizationChapter 5 Parameters Optimization
Chapter 6 Optimization ReportChapter 6 Optimization Report
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 4/76
HUAWEI TECHNOLOGIES CO., LTD. Page 3All rights reserved
WCDMA Optimization FlowWCDMA Optimization Flow
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 5/76
HUAWEI TECHNOLOGIES CO., LTD. Page 4All rights reserved
Introduction of Optimization FlowIntroduction of Optimization Flow
Customized Document:
Acceptance Report
Optimization Report
Site Configuration Parameter Table
Radio Part Parameter configuration Table
Process Document and Data:
Site configuration Parameter Table
Radio part Parameter configuration Table
Output document:
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 6/76
HUAWEI TECHNOLOGIES CO., LTD. Page 5All rights reserved
Chapter 1 Introduction of Optimization FlowChapter 1 Introduction of Optimization Flow
Chapter 2 The preparation for the Optimization ProjectChapter 2 The preparation for the Optimization Project
Chapter 3 Single Site VerificationChapter 3 Single Site Verification
Chapter 4 RF OptimizationChapter 4 RF Optimization
Chapter 5 Parameters OptimizationChapter 5 Parameters Optimization
Chapter 6 Optimization ReportChapter 6 Optimization Report
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 7/76
HUAWEI TECHNOLOGIES CO., LTD. Page 6All rights reserved
WCDMA Optimization Flow - PreparationWCDMA Optimization Flow - Preparation
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 8/76
HUAWEI TECHNOLOGIES CO., LTD. Page 7All rights reserved
The Preparation for Projection
Understanding of the Existing Network
Cluster Division and Optimization Team
Establishment
Optimization Tools and Software
The following work is required:
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 9/76
HUAWEI TECHNOLOGIES CO., LTD. Page 8All rights reserved
The Preparation for Projection
Understanding of the Existing Network :
Radio Network Planning report
Latest site configuration parameter table and radiopart parameter configuration table
OMC statistic data and subscriber complaints ofthe existing network
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 10/76
HUAWEI TECHNOLOGIES CO., LTD. Page 9All rights reserved
The Preparation for the Optimization ProjectionCluster Division and Optimization Team Establishment
RNO leader-1
Data Analyzer
Drive Test Operator
Driver
RNO leader-n
Data Analyzer
Drive Test Operator
Driver
..................
RNO manager
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 11/76
HUAWEI TECHNOLOGIES CO., LTD. Page 10All rights reserved
The Preparation for Projection
Optimization Tool:
UMTS Scanner
UMTS Test UE
GPS and data line
Digital camera
spectrum analyzer
Optimization Software:
Post processing tool
MapInfo
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 12/76
HUAWEI TECHNOLOGIES CO., LTD. Page 11All rights reserved
Chapter 1 Introduction of Optimization FlowChapter 1 Introduction of Optimization Flow
Chapter 2 The preparation for the Optimization ProjectChapter 2 The preparation for the Optimization Project
Chapter 3 Single Site VerificationChapter 3 Single Site Verification
Chapter 4 RF OptimizationChapter 4 RF Optimization
Chapter 5 Parameters OptimizationChapter 5 Parameters Optimization
Chapter 6 Optimization ReportChapter 6 Optimization Report
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 13/76
HUAWEI TECHNOLOGIES CO., LTD. Page 12All rights reserved
WCDMA Optimization Flow – Single Site VerificationWCDMA Optimization Flow – Single Site Verification
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 14/76
HUAWEI TECHNOLOGIES CO., LTD. Page 13All rights reserved
Single Site Verification
Purpose:
The single site verification test is a part of the WCDMA networkoptimization to ensure that the basic functions of the cell are normal,such as call access, call quality, handover and so on.
Single site verification involves the following aspects:
Parameter setting check in idle mode
Services call (AMR/VP/PS) function check in connected mode
HSDPA function check
CPICH RSCP & Ec/Io
Installing problems check
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 15/76
HUAWEI TECHNOLOGIES CO., LTD. Page 14All rights reserved
Single Site Verification
Single site verification includes :
preparations before test
single site test
solving problems
The single site verification is completed by:
On-site engineers
RNO engineers
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 16/76
HUAWEI TECHNOLOGIES CO., LTD. Page 15All rights reserved
Single Site Verification - Task of the on-site engineers
Preparations
Site Status Check
For each cell to be measured, check Status by LMT or M2000 Status
Configuration Data Collection and Check
check whether the data configured is consistent with the planned data
Testing Point Selection
Test UE Setup
Set the handset to testing mode before test
Other Preparations
Application key
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 17/76
HUAWEI TECHNOLOGIES CO., LTD. Page 16All rights reserved
Verification in Idle Mode
Frequency Check
Check whether the frequency number of the cell to be measured isconsistent with the planned data
Scramble Check
Check whether the scramble configuration is consistent with the
planned configuration
LAC/RAC Check
Check whether the LAC/RAC of the cell to be measured is consistentwith the planed one.
CPICH_RSCP/CPICH_Ec/Io (Near Site) Test
Check whether the CPICH RSCP and CPICH Ec/Io received by UE aregreater than the threshold
Single Site Verification - Task of the on-site engineers
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 18/76
HUAWEI TECHNOLOGIES CO., LTD. Page 17All rights reserved
Verification in connect Mode
Originating and Terminating Connection Test of Voice Service
Check whether the originating and terminating function of voice servicefunction normally by call quality test
Originating and Terminating Connection Test of VP Service
Check whether the originating and terminating function of VP service
function normally by call quality test
Connection Test of PS Services
Check whether the originating function of PS services are normal byhandset online service
Solving Problems
If on-site engineers find product function problems or parameter configurationproblems, the engineers must location them and retest until the problems aresolved and process terminates.
Single Site Verification - Task of the on-site engineers
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 19/76
HUAWEI TECHNOLOGIES CO., LTD. Page 18All rights reserved
Preparations
Cell Status Confirmation
Before checking site, you need to inquiry product support engineerswhether the cell is in normal status
Testing Route Selection
Before test, you must select a proper testing route according to site
distribution and local environment
Precautions
Single Site Verification – Task of the RNO engineers
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 20/76
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 21/76
HUAWEI TECHNOLOGIES CO., LTD. Page 20All rights reserved
HSDPA Access Function Test
To test HSDPA access function
Antenna Diversity Check
Check whether the antenna for receiving diversity signals is reverselyconnected
Fixed Maximum Transmit Power of UE, measure the RTWP of the cells
Checking Antennas by Exchanging Feeders
Single Site Verification – Task of the RNO engineers
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 22/76
HUAWEI TECHNOLOGIES CO., LTD. Page 21All rights reserved
Antenna Diversity Check
The method for UE to transmit signals at the fixed maximum poweris a recommended method of test and operation
Solving Problems
If RNO engineers find problems about product function, RNO engineersmust ask product support engineers to solve problems
Single Site Verification – Task of the RNO engineers
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 23/76
HUAWEI TECHNOLOGIES CO., LTD. Page 22All rights reserved
Single Site Verification
Summarization:
In single site verification stage, engineers check whether equipmentfunctions normally
Single site verification is a basis for the following RF optimization and
service optimization
If all verifications about function are accepted, the single site verificationis completed
After single site verification, optimization comes to RF optimization
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 24/76
HUAWEI TECHNOLOGIES CO., LTD. Page 23All rights reserved
Chapter 1 Introduction of Optimization FlowChapter 1 Introduction of Optimization Flow
Chapter 2 The preparation for the Optimization ProjectChapter 2 The preparation for the Optimization Project
Chapter 3 Single Site VerificationChapter 3 Single Site Verification
Chapter 4 RF OptimizationChapter 4 RF Optimization
Chapter 5 Parameters OptimizationChapter 5 Parameters Optimization
Chapter 6 Optimization ReportChapter 6 Optimization Report
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 25/76
HUAWEI TECHNOLOGIES CO., LTD. Page 24All rights reserved
WCDMA Optimization Flow – RF OptimizationWCDMA Optimization Flow – RF Optimization
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 26/76
HUAWEI TECHNOLOGIES CO., LTD. Page 25All rights reserved
RF Optimization - Overview
Once all the sites are installed and verification is complete, RF
optimization starts.
During the RF optimization stage, you will optimize radio frequency
(RF) signals , so that the distribution of radio signals is normal in next
service -- parameters optimization stage
RF optimization includes the following aspects:
Coverage optimization
Pilot pollution optimization
Handover optimization
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 27/76
HUAWEI TECHNOLOGIES CO., LTD. Page 26All rights reserved
RF Optimization flow
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 28/76
HUAWEI TECHNOLOGIES CO., LTD. Page 27All rights reserved
RF Optimization - Preparation (1)
Deciding Optimization target
Weak coverage
Pilot pollution
High SHO Factor based on DT
Dividing Clusters
Deciding Test Route Confirm the KPI DT acceptance route with the operator
before DT
Preparing Tools and Data
Preparing Software
Preparing Hardware Preparing Data
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 29/76
HUAWEI TECHNOLOGIES CO., LTD. Page 28All rights reserved
RF Optimization - Targets
– ≤ 5%Pilot pollution ratio
The SHO Factor based on DT should be 5% to 10%
lower than the goal, because the following
optimizations cause the soft handover factor to increase
30% – 40%SHO Factor based on DT
≥ 95% in suburban area
According to test result from the scanner, in unloaded
and outdoor conditions, in planning coverage areas, test
in a grid-like route to cover all cells. The coverage level
request is basic. If operators have penetration loss
request, add the penetration loss to the coverage level.
≥ 98% in urban area
CPICH RSCP≥ – 95dBm
≥ 97% in suburban area
According to test result from the scanner, in unloaded
and outdoor conditions, in planning coverage areas, testin a grid-like route to cover all cells.
≥ 97% in urban area
CPICH Ec/Io≥
– 9dB
RemarksReferenceIndex
RF Optimization - Preparation (2)
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 30/76
HUAWEI TECHNOLOGIES CO., LTD. Page 29All rights reserved
RF Optimization - Preparation (3)
Dividing Clusters
RF optimization must be performed on a group of or a
cluster of NodeBs ,This ensures that interference from
intra-frequency neighbor cells are considered during
optimization. Dividing clusters involves approval by the operator.
Deciding Test Route
The KPI DT acceptance route is the core route of RF
optimization test routes. Its optimization is the core of
RF optimization.
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 31/76
HUAWEI TECHNOLOGIES CO., LTD. Page 30All rights reserved
RF Optimization - Preparing Tools and Data:
MapinfoGenex Nastar
Genex Assistant
Genex Probe
Software
Vehicle mounted inverter
Laptop
Test terminal and dataline
Scanner
Device
Floor plan of the target
buildings
Single site verification checklist
Survey report
Network configurationparameters
KPI requirements
Map
List of engineering parameters
Needed data
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 32/76
HUAWEI TECHNOLOGIES CO., LTD. Page 31All rights reserved
RF Optimization - Data Collection
During RF optimization stage, the key is the optimization ofradio signals distribution, with the major means of DT and indoortest
DT is a major test. Collect scanner and UE data of radio signals
by DT test
Usually the DT and indoor test during RF optimization stage isbased on VP service.
During RF optimization stage, collect neighbor cell data ofnetwork optimization and other data configured in RNC database
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 33/76
HUAWEI TECHNOLOGIES CO., LTD. Page 32All rights reserved
RF Optimization - RF problem solutions
Antenna tilt
Antenna azimuth
Antenna location
Split sector
Remove sector
Combine sector
Antenna height
Antenna type
TMA
RRU
Site location
New site
h1
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 34/76
HUAWEI TECHNOLOGIES CO., LTD. Page 33All rights reserved
RF Optimization
Attention:
During the RF optimization ,sometimes the problems can be resolved
completely by proper adjustment, but there are also some disadvantages of
the RF optimization
The duration of the RF Optimization will be always very long
Some adjustment are difficult to implement
If the problems are not resolved by the RF optimization, it is
difficult to recover the antennas back to the former conditions
h1
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 35/76
Slide 34
h1 考 虑 删 除
hw, 02/12/2006
V1
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 36/76
HUAWEI TECHNOLOGIES CO., LTD. Page 34All rights reserved
RF Optimization
Some advices:
Before the RF adjusting, we’d better survey the relative
sites, and give some applicable advice
If possible, do the RF adjustment and test the effect at
the same time
Slid 35
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 37/76
Slide 35
1 V78692, 19/07/2007
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 38/76
HUAWEI TECHNOLOGIES CO., LTD. Page 35All rights reserved
RF Coverage Problem Analysis
Coverage problem analysis is key to RF optimization. It
involves signal distribution. The coverage problems to beanalyzed include:
Weak coverage
Overshoot coverage
Unbalance between uplink and downlink
No primary pilot cell
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 39/76
HUAWEI TECHNOLOGIES CO., LTD. Page 36All rights reserved
RF Coverage Problem Analysis
Coverage Analysis Processes:
Downlink Coverage Analysis Analyzing Pilot Coverage Strength
Analyzing Pilot Coverage quality
Analyzing Primary Pilot Cell
Analyzing comparison of UE and Scanner Coverage
Uplink Coverage Analysis
Analyzing Uplink Interference
Analyzing distribution of UE Transmit Power
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 40/76
HUAWEI TECHNOLOGIES CO., LTD. Page 37All rights reserved
RF Coverage Problem Analysis
Check areas of poor coverage, suggestion value as below:
Good: RSCP ≥ -85 dBm
Fair: -95 dBm ≤ RSCP < -85 dBm
Poor: RSCP < -95 dBm
Mark the areas with weak coverage or common seamless
coverage of large areas for further analysis
Downlink coverage analysis - Pilot Coverage Strength Analysis
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 41/76
HUAWEI TECHNOLOGIES CO., LTD. Page 38All rights reserved
RF Coverage Problem Analysis
Downlink coverage analysis - Pilot Coverage Strength Analysis
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 42/76
HUAWEI TECHNOLOGIES CO., LTD. Page 39All rights reserved
RF Coverage Problem Analysis
Ec/Io plot should also be analysed based on the
thresholds :
Good: Ec/Io ≥ -8 dB
Fair: -14 dB ≤ Ec/Io < -8 dB Poor: Ec/Io < - 14 dB
Areas of poor Ec/Io should be highlighted for further
investigation
Downlink coverage analysis - Pilot Coverage quality Analysis
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 43/76
HUAWEI TECHNOLOGIES CO., LTD. Page 40All rights reserved
RF Coverage Problem Analysis
-15.5
-104
-20
-19
-18
-17
-16
-15
-14
Ec/Io RSCP
- 1 2 0
- 1 1 5
- 1 1 0
- 1 0 5
- 1 0 0
- 9 5
- 9 0
What’s the
problem?
Downlink coverage analysis - Pilot Coverage quality Analysis:
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 44/76
HUAWEI TECHNOLOGIES CO., LTD. Page 41All rights reserved
RF Coverage Problem Analysis
-15.5
-63
-20
-19
-18
-17
-16
-15
-14
Ec/Io RSCP
-90
-85
-80
-75
-70
-65
-60
What’s theproblem?
Downlink coverage analysis - Pilot Coverage quality Analysis:
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 45/76
HUAWEI TECHNOLOGIES CO., LTD. Page 42All rights reserved
RF Coverage Problem Analysis
Downlink coverage analysis - Analyzing Primary Pilot Cell:
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 46/76
HUAWEI TECHNOLOGIES CO., LTD. Page 43All rights reserved
RF Coverage Problem AnalysisCoverage Problem Analysis
Downlink coverage analysis - Analyzing Primary Pilot Cell:
Cell primary pilot analysis is analyzing cell scrambleinformation obtained in DT
The content to be checked include :
Weak coverage cell
Cross-cell coverage cell
No primary pilot cell
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 47/76
HUAWEI TECHNOLOGIES CO., LTD. Page 44All rights reserved
RF Coverage Problem AnalysisCoverage Problem Analysis
Downlink coverage analysis - Analyzing Primary Pilot Cell:
RF Coverage Problem AnalysisCoverage Problem Analysis
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 48/76
HUAWEI TECHNOLOGIES CO., LTD. Page 45All rights reserved
RF Coverage Problem AnalysisCoverage Problem AnalysisDownlink coverage analysis - Analyzing comparison of UE and Scanner Coverage :
Inconsistent Best Service Cell between scanner and UE
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 49/76
RF C P bl A l iC P bl A l i
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 50/76
HUAWEI TECHNOLOGIES CO., LTD. Page 47All rights reserved
RF Coverage Problem AnalysisCoverage Problem Analysis
Uplink - Distribution of UE Transmit Power:
The distribution of UE transmit power reflects the distribution of uplinkinterference and uplink path loss
The distribution of UE transmit power
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 51/76
HUAWEI TECHNOLOGIES CO., LTD. Page 48All rights reserved
Pilot Pollution Problem AnalysisPilot Pollution Problem Analysis
Pilot Pollution Point Definition:
The pilot pollution is that excessive strong pilots exist in a
point but no primary pilot is strong enough
Pilot pollution exists if all the following conditions are met:
The number of pilots that meet the following conditionis more than 4 and CPICH_RSCP > -100dBm
(CPICH_RSCP1st - CPICH_RSCP 4th)< 5dB
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 52/76
HUAWEI TECHNOLOGIES CO., LTD. Page 49All rights reserved
Pilot Pollution Problem AnalysisPilot Pollution Problem Analysis
-62-63
-64
-66 -67
-81
-90
-85
-80
-75
-70
-65
-60
SC1 SC2 SC3 SC4 SC5 SC6
R S C P ( d B m )
Active Set Pilot Pollution
Margin
NotPilot Pollution
Pilot Pollution Definition - Judgment Standards :
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 53/76
HUAWEI TECHNOLOGIES CO., LTD. Page 50All rights reserved
Pilot Pollution Problem AnalysisPilot Pollution Problem Analysis
Pilot Pollution Definition - Estimated Active Set Size ExampleEstimated Active Set Size Example :
Pil t P ll ti P bl A l iPil t P ll ti P bl A l i
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 54/76
HUAWEI TECHNOLOGIES CO., LTD. Page 51All rights reserved
Pilot Pollution Problem AnalysisPilot Pollution Problem Analysis
SC C ount % in P o llu tion Set
8 206 12 .9%
9 165 10 .3%
10 157 9.8%
11 156 9.7%
12 148 9.2%
13 135 8.4%
16 95 5.9%
17 94 5.9%
18 76 4.7%
19 74 4.6%
20 73 4.6%
21 56 3.5%32 54 3.4%
35 39 2.4%
37 33 2.1%
43 19 1.2%
48 8 0.5%
53 7 0.4%
67 3 0.2%80 2 0.1%
130 2 0.1%
Should be investigatedShould be investigated
Pilot Pollution Definition - Estimated Active Set Size Example :
Pilot pollution results
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 55/76
HUAWEI TECHNOLOGIES CO., LTD. Page 52All rights reserved
Pilot Pollution Problem AnalysisPilot Pollution Problem Analysis
Causes of Pilot Pollution :
Improper Cell Distribution
Over High NodeB or Highly-mounted Antenna
Improper Antenna Azimuth
Improper Antenna Down Tilt
Improper PICH Power
Ambient Factors
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 56/76
HUAWEI TECHNOLOGIES CO., LTD. Page 53All rights reserved
Pilot Pollution Problem AnalysisPilot Pollution Problem Analysis
Pilot pollution causes the following network problems:
Ec/Io Deterioration
Call Drop Due to Handover
Capacity Decline
Influence of Pilot Pollution :
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 57/76
HUAWEI TECHNOLOGIES CO., LTD. Page 54All rights reserved
Pilot Pollution Problem AnalysisPilot Pollution Problem Analysis
Process for Analyzing Pilot Pollution :
Analyze scanner-based RSCP for 1st Best Service Cell
and Ec/Io for 1st Best Service Cell
Analyze scanner-based Whole PP
Locate the cells that cause pilot pollution of the key areas.
judge whether the pilot pollution is caused by existence ofmultiple strong pilots or lack of a strong pilot
confirm the cells that need eliminating the coverage of anarea and that need enhancing the coverage of an area
Retest after adjustment
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 58/76
HUAWEI TECHNOLOGIES CO., LTD. Page 55All rights reserved
Pilot Pollution Problem AnalysisPilot Pollution Problem Analysis
Solutions of Pilot Pollution :
Antenna Adjustment
PCPICH Power Adjustment
Using RRU or Micro Cells
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 59/76
HUAWEI TECHNOLOGIES CO., LTD. Page 56All rights reserved
Handover Problem AnalysisHandover Problem Analysis
By adjusting RF parameters ,we can Control the size and
location of handover areas ,then we can eliminate handover
call drop due to sharp fluctuation and increase handover
success rate.
During RF optimization stage, the involved handover
problem include:
Neighbor cell optimization
Controlling SHO Factor based on DT
Handover Problem AnalysisHandover Problem Analysis Neighbor cell optimizationNeighbor cell optimization
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 60/76
HUAWEI TECHNOLOGIES CO., LTD. Page 57All rights reserved
Handover Problem AnalysisHandover Problem Analysis -- Neighbor cell optimizationNeighbor cell optimization
During RF optimization stage, missing neighbor cell is a key problem. The
neighbor cell optimization includes adding and removing neighbor cells
Add: Missing neighbors
Remove: These neighbors that were not measured but are in the neighbor list.
Careful consideration is needed prior to removing neighbours
Neighbor cell optimization can be analyzed by :
Scanner Data
UE Data Analysis
Handover Problem AnalysisHandover Problem Analysis Neighbor cell optimizationNeighbor cell optimization
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 61/76
HUAWEI TECHNOLOGIES CO., LTD. Page 58All rights reserved
By the scanner data, the Assistant can generate a neighbor cell analysis
report in the format of Excel
Handover Problem AnalysisHandover Problem Analysis -- Neighbor cell optimizationNeighbor cell optimization
Handover Problem AnalysisHandover Problem Analysis - Neighbor cell optimizationNeighbor cell optimization
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 62/76
HUAWEI TECHNOLOGIES CO., LTD. Page 59All rights reserved
We can also analyze a missing neighbor cell by UE DT data
The daemon analysis tool can seldom analyze UE data automatically
and generate missing neighbor cells
but we can Compare the active set Ec/Io distribution diagram
measured by UE and that measured by scanner
The spots with missing neighbor cells has a poor Ec/Io measured by
UE and a strong Ec/Io scanned by scanner .
Handover Problem AnalysisHandover Problem Analysis -- Neighbor cell optimizationNeighbor cell optimization
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 63/76
HUAWEI TECHNOLOGIES CO., LTD. Page 60All rights reserved
Handover Problem AnalysisHandover Problem Analysis
According to the DT data from scanner, you can obtain the SHO
Factor based on DT, defined as below:
Controlling SHO Factor based on DT:Controlling SHO Factor based on DT:
DTinpointscollected-scannertotalof Number
conditionshandovermeet thethatDTinpointscollected-scannerof Number= Ratio Handover Soft
The SHO Factor based on DT during RF optimization stage must
be 5%–10% lower than the KPI target value
Handover Problem AnalysisHandover Problem Analysis
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 64/76
HUAWEI TECHNOLOGIES CO., LTD. Page 61All rights reserved
Handover Problem AnalysisHandover Problem Analysis
UE SHO Performance
The success rates for event 1a, 1b & 1c and can be obtained
from software
Number of Active Set UpdatesNumber of Active Set Updates
Event Count
Event 1a - 328
Event 1b - 306
Event 1c - 64
Number of Active Set Update CompletesNumber of Active Set Update Completes
Event Count
Event 1a - 326
Event 1b - 305Event 1c - 62
Soft-Handover Success RateSoft-Handover Success Rate
Event Rate
Event 1a - 99.4
Event 1b - 99.7
Event 1c - 96.9
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 65/76
HUAWEI TECHNOLOGIES CO., LTD. Page 62All rights reserved
RF Analysis Approaches – Neighbor List
If the SHO Factor based on DT is over large, decrease or change
the handover areas by using the following methods for shrinking
coverage areas:
Increase the down tilt
Adjust azimuth
Decrease the antenna height
Decrease the PICH power
Controlling SHO Factor based on DT:
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 66/76
HUAWEI TECHNOLOGIES CO., LTD. Page 63All rights reserved
Chapter 1 Introduction of Optimization FlowChapter 1 Introduction of Optimization Flow
Chapter 2 The preparation for the Optimization ProjectChapter 2 The preparation for the Optimization Project
Chapter 3 Single Site VerificationChapter 3 Single Site Verification
Chapter 4 RF OptimizationChapter 4 RF Optimization
Chapter 5 Parameters OptimizationChapter 5 Parameters Optimization
Chapter 6 Optimization ReportChapter 6 Optimization Report
WCDMA Optimization Flow – Parameter OptimizationWCDMA Optimization Flow – Parameter Optimization
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 67/76
HUAWEI TECHNOLOGIES CO., LTD. Page 64All rights reserved
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 68/76
HUAWEI TECHNOLOGIES CO., LTD. Page 65All rights reserved
Purpose of Parameters Optimization
Purpose of parameters optimization
Increase the access success ratio Decrease the call drop ratio
Increase the quality of service
The tools and data for analysis:
scanner and UE
RNC record data
Statistic tools and KPI
MSC & SGSN record if necessary
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 69/76
HUAWEI TECHNOLOGIES CO., LTD. Page 66All rights reserved
Drive test The contents of drive test
The call setup test for voice service
The continuous call test for voice service
Idle mode test
The call setup test for video phone service
The continuous call test for voice service
The call setup test for PS service
The continuous call test for PS service
The test should be performed repeatedly to the position withThe test should be performed repeatedly to the position withproblems to make sure that the problem is repeatableproblems to make sure that the problem is repeatable
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 70/76
HUAWEI TECHNOLOGIES CO., LTD. Page 67All rights reserved
Drive Test Data Analysis
Drive Test Data Analysis
Analyzing and finding out the solution for access failure
Analyzing and finding out the solution for drop call
Analyzing and finding out the solution for service
quality related problems
Adjustment Recommendation and Implementation
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 71/76
HUAWEI TECHNOLOGIES CO., LTD. Page 68All rights reserved
Adjustment Recommendation and Implementation
Adjustment Recommendation and Implementation
Common Control Channel Power Allocation parameters
RL Maximum Power parameters
Intra-frequency Handover parameters
Inter-frequency Handover parameters
Inter-RAT Handover parameters
Power Control parameters
Access parameters
Other related parameters
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 72/76
HUAWEI TECHNOLOGIES CO., LTD. Page 69All rights reserved
Test for Special Areas
Special area refers to a small district or indoors environment
Operator offices, residence of VIP
Key hotels or entertainment location
Government location
Locations of large company or group subscribers
Locations tend to be cared , such as railway station or airport
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 73/76
HUAWEI TECHNOLOGIES CO., LTD. Page 70All rights reserved
Chapter 1 Introduction of Optimization FlowChapter 1 Introduction of Optimization Flow
Chapter 2 The preparation for the Optimization ProjectChapter 2 The preparation for the Optimization Project
Chapter 3 Single Site VerificationChapter 3 Single Site Verification
Chapter 4 RF OptimizationChapter 4 RF Optimization
Chapter 5 Parameters OptimizationChapter 5 Parameters Optimization
Chapter 6 Optimization ReportChapter 6 Optimization Report
WCDMA Optimization Flow – Optimization Report OutputWCDMA Optimization Flow – Optimization Report Output
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 74/76
HUAWEI TECHNOLOGIES CO., LTD. Page 71All rights reserved
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 75/76
HUAWEI TECHNOLOGIES CO., LTD. Page 72All rights reserved
Optimization Report
The《《《《optimization report》》》》 should be presented after theproject passes the customer acceptance. The optimizationreport should include:
Project background introduction
Existing network status
Acceptance criteria
Optimization process
Problem analysis and adjustment recommendation, and theeffect for the implemented part
Acceptance test and result
Leftover problems and suggestions from the optimization pointof view.
7/28/2019 005 Wcdma Utran Optimization Flow Issue1
http://slidepdf.com/reader/full/005-wcdma-utran-optimization-flow-issue1 76/76
www.huawei.com
Thank You