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HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
Huawei Confidential
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2013/8/29
UMTS Network PS
Performance Optimization
Inventory Solution Dept.
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Context
Multi-Carrier Strategy Management
KPI Optimization
UL/DL Capacity Improvement
QoS
Page 2
HUAWEI TECHNOLOGIES CO., LTD. Page 3
Introduction
Background:
Remark: Multi-carrier strategy also include multi-band situation, such as
U900+U2100.
With the steady growth of radio services especially the data services, operators need to expand the capacity of the live network and add
more carriers are one of the choices
Currently multi-band and multi-carrier networking has become a main scenario for lots of operators live networks.
Deploying different strategies will meet different operators requirements in different scenarios
274 389
621
911
1221
1501
Strategy content
Camping
Policy Mobility
Policy
Access
Policy Load
Balance
Policy
Status
Transition
HSPA+
Multi-Carrier Strategy
Neighboring Cell
Management
Algorithm
Switch
Service
Priority Group
(SPG)
Setting
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Context
Multi-Carrier Strategy Management
KPI Optimization
RRC Access Call Drop
UL/DL Capacity Improvement
QoS
Page 4
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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RRC Successful Setup Optimization
Solutions
Access Fail
Scene
Value
Analysis Tools
1) Automatic statistical analysis of the current network data (MML+ Performance data + PCHR) ; 2) Get the specific root causes of the failure from the multi-dimensional analysis.
Combinatorial measures
Parameter adjustment + Features + Expansion
Value:
Increase RRC access success rate, improve user experience. Ensure the customer network competitiveness and brand image.
Scene analysis
Equipment Capacity
UU Radio Capacity
UU Radio Quality
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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RRC Access Analysis Flow
Page 6
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RRC Access Fail Scene
Page 7
Based on CNBAP Capacity
(for both MPT and BBP)
MPU : Main Processing Unit
SPU : Signaling Process Unit
ENU Equivalent Number of Users
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Tools Architecture
Page 8
RNC PCHR Data
MML
MML
RNC
Performance data
NodeB
Configuration
Information
RRC
Perfor
mance
data
Tools
RRC
PCHR
Tool
Performance
data Result Table
RRC PCHR
Analysis Result
Table
RRC
Access
Fail
Analysi
s Tool
RRC Access
Fail Detail
Information
Table
RRC Access
Fail Statistic
Table
OMStar V5R6 Standalone
Fault call, normal call..
OMStar V5R6 Server/
Nastar R10 SPC500
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Tools Analyze Flow
Page 9
Step3Performance
data
analysis
Step1Pre-process PCHR logs
Step2PCHR logs Process
Step4RRC Access Fail Analysis
Same
Busy
Hour
OMStar V5R6 Standalone OMStar V5R6 Server/
Nastar R10 SPC500
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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RRC Access Fail Statistic Result for
Different dimensions
Page 10
Failure statistic table scenario
distribution analysis according to different dimensions
Please refer "the RRC access technical guidance book
Online Support :
URFSTG00323-Troubleshooting Guide to UMTS RRC
Connection Setup and Voice Access Problems-V2R1.doc
http://3ms.huawei.com/mm/docMaintain/mmMaintain.do?meth
od=showMMDetail&f_id=NTS201109230098
Tools : NP Mastar, FMA RRC Performance Tools : PRS, OM Star, M2000 online
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Commercial Case
Page 11
Eg. after add a new carrier, active dynamic CE, modify the
resource group, optimize the GBR, LDR and reserve CE
threshold for handover, RRC success setup rate increase
from 79% to 99%.
Country C Operator I SiteXXX, After NodeB BBP board
expansion, RRC Success Setup Rate increase, the RRC
setup fail times decreased from 20000+ to 0 times per
hour.
RRC Failure due to BBP Overload
65%
UL CE Congestion 15%
DL Power Congestion, 0.48%
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Context
Multi-Carrier Strategy Management
KPI Optimization
RRC Access Call Drop
UL/DL Capacity Improvement
QoS
Page 12
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Call drop analysis summary
Page 13
Improve UE experience
Optimize Call drop KPI
Goal
While the User call is dropped abnormally, It may make user angry and the experience of the network is poor.
Optimize the Call drop KPI is an important work in daily network maintenance.
We develop tools helping the engineers to analyze call drop issue easily.
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Call drop analysis summary
Page 14
Solution
Technical Guide
OMStar V5R6 Server or
Nastar R10 SPC500
&Analysis Tool
Logs CFG Script
5%
1%
31%
23%
40%
Call Drop Distribution
RNC performance data analysis could help to find the root cause for call drop such as SRB ( Signaling Radio
Bearer) reset, TRB (Transport Radio bearer) reset, UL
sync fail and so on.
Huawei OMStar V5R6 Server tools use RNC PCHR logs and configuration script to analyze the drop call and
provide the call drop distribution scene
Technical guide, help to find a solution for call drop scene.
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Call drop analysis summary
Page 15
De
vic
e
Inte
rfac
e
Call drop in IU interface Call drop in IUB interface Call drop in IUR interface
UE abnormal NODEB/RNC abnormal CN abnormal
Call drop in inter-rat handover
Call drop in inter-freq handover
ha
nd
ove
r
Ne
two
rk
pla
nn
ing
Pilot pollution Slow soft-handover Lack of neighbor
UU
inte
rfa
ce
Single/Combine service call drop
Bad signal/ Good signal
Call drop due to resource congestion
Re
so
urc
e
Call drop scene The call drop scene is divided in six main scenes with their own sub-scenes.
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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How to improve the call drop
Page 16
43%
20%
14%
12%
4% 2%
2%
2% 1% 0% 0%
CS Call drop distribution DropCall_CombinedService
DropCall_DueTo_BadCoverage
DropCall_DueTo_High_RTWP
Other
DropCall_InterFreq/InerRatRelated
Cause for call drop
20%
12%
11% 9% 7%
5%
4%
4%
4%
4% 3%
2%
2%
2%
2% 2%
1%
1%
1%
0%
0% 0% 0% 0% 0%
Combine Service Call drop distribution
DropCall_DueTo_High_RTWP
DropCall_Dueto_MeasCtrl_No_Reply
DropCall_DueTo_ASU_TimeOut
Other
Optimization / suggestion
Scene suggestion
The high RTWP contribute about 14% CS call drop. Optimize RTWP
The TOP site of IUB trans abnormal contribute about 15% CS call drop. Solve the trans abnormal in TOP site.
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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Context
Multi-Carrier Strategy Management
KPI Optimization
UL/DL Capacity Improvement
QoS
Page 17
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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UL R
adio
capacity
Lim
ited
1.Add text in here
2.Add text in here
3.Add text in here
UL Device
Capacity
Limited UL Radio
capacity
Limited
1.Add text in here
2.Add text in here
3.Add text in here
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2.Add text in here
3.Add text in here
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2.Add text in here
3.Add text in here
Capacity Optimization Structure Optimization Value
Find out network bottleneck,
improve user and cell throughput,
improve user experience and TVO.
Operation
Solution
Through professional tool,
give out all the limited
scenarios, than choose
reasonable
solution(Parameter/Featur
e/Expansion)
DL Device
Capacity
Limited DL Radio
Capacity
Limited
UL D
evic
e
Capacity
Lim
ited
DL R
adio
Capacity
Lim
ited
DL D
evic
e
Capacity
Lim
ited
Application
Scenario Low throughput,
poor user experience;
Improve network competition.
RNC Script
RNC Counter
NODEB Counter
NODEB License
Scenario Output Tool Analysis Log Collection
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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UL Radio Optimization Whole Scenario Capacity
Limit Scenario Sub Scenario Optional Solution
Solution
Property
Versio
n
Radio
Capacity
Limit
system
interference
Limit
RF Troubleshooting troubleshooting ALL
transient background
noise anti-interference scheduling for HSUPA Feature R13
stable background
noise
optimize background Noise parameter ALL
automatically background noise update parameter ALL
Target Load
Limit
increase UL ROT parameter ALL
multi-carrier expansion expansion ALL
New site expansion expansion ALL
4RX Diversity function ALL
Independent demodulation of signals from multiple RRUs in one cell Feature R13
LDR based uplink radio load parameter ALL
LDB Between multi-carrier parameter ALL
High R99 Load CCPIC channel parallel interference cancellation Feature R10
Optimization of R99 and HSUPA user fairness feature R13
High HS-DPCCH Load CQI feedback period optimization parameter ALL
traffic-based activation and deactivation of the supplementary carrier in multi-carrier Feature R13
High HSUPA Load
HSUPA PO Optimization parameter ALL
adaptive configuration of traffic channel power offset for HSUPA Feature R13
IC Feature R12
HSUPA adaptive transmission Feature R12
2ms/10ms TTI switch based on RTWP parameter R12
Dual-threshold scheduling with HSUPA IC Feature R13
FDE Feature R12
L2+ parameter R13
16QAM/E-DPCCH Boosting parameter R13
CPC DTX Feature R13
High RRC Load
RRC request retransmission parameter optimization parameter ALL
RRC connection retransmission parameter optimization parameter ALL
Cell PCH parameter ALL
FD/EFD Feature R12
High RACH Load RACH Access parameter optimization parameter ALL
F2P,F2H trigger threshold optimization parameter ALL
F2P,F2H Timer Optimization parameter ALL
UE Coverage
Limit UE TX power Limit
HSUPA coverage enhanced at UE power limitation Feature R13
adaptive configuration of traffic channel power offset for HSUPA Feature R13
HSUPA adaptive transmission Feature R12
Coverage based E2D Feature R12
TTI switch for BE serivce base on coverage Feature R12
Normal R99 Cell
HSUPA Feature R10
5.74Mbps Feature R10
HSUPA Cell TPE Feature R12
Uplink enhanced CELL FACH Feature R13
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UL Device Optimization Whole Scenario Capacity Limit
Aspect Scenario Sub Scenario Optional Solution
Solution
Property Version
Device Resource
Limited
CAC User number
Limited
Equivalent user
number limited
increase equivalent user number parameter ALL
multicarrier/multisector/micro site expansion expansion ALL
HSUPA user
number limited
increase HSUPA user number parameter ALL
60/96 HSUPA per cell feature R12
CE Resource
Limited
Admission CE
Limited
CE Overbooking(R14) feature R14
decrease GBR parameter ALL
2ms/10ms TTI switch based on admission CE feature R12
Physical CE Limited Dynamic CE feature R10
CE expansion expansion ALL
IUB Resource
Limited
IUB admission
bandwidth Limited IUB overbooking parameter ALL
IUB physical
bandwidth Limited IUB expansion expansion ALL
IUB QOS Limited packet loss and time delay valuation troubleshooting ALL
expansion expansion ALL
NODEB CPU/DSP
Limited
NODEB WMPT
CPU Limited
UTRP expansion expansion ALL
software upgrade upgrade ALL
NODEB WBBP
CPU Limited WBBP expansion/resource group
optimization/software upgrade expansion
ALL
NODEB WBBP
DSP Limited ALL
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DL Radio Optimization Whole Scenario Capacity Limit
Aspect Scenario Sub Scenario Optional Solution
Solution
Property Version
Radio Resource
Limit
Channel Quality
Limit
MPOC adjustment parameter ALL
PCPICH power optimization parameter ALL
Common channel optimization parameter ALL
RF Optimization troubleshooting ALL
Expansion expansion ALL
TCP Load Limit
Common solution
Decrease Power Margin parameter ALL
Increase CAC Threshold parameter ALL
Expansion expansion ALL
High RRC Load LAC timer optimization parameter ALL
Cell PCH/R8 FD feature RAN12
High FACH Load
FACH UE power control parameter RAN11
HSDPA status transfer timer optimization parameter ALL
HSDPA status transfer trigger threshold optimization parameter ALL
High R99 Load
CS over HSDPA feature RAN11
SRB over HSDPA feature RAN12
BE Rate decrease/inter frequency HO LDR
feature RAN10
High HSDPA Load
Code Priority parameter RAN10
HSSCCH dynamic power control parameter RAN10
multi-carrier PA sharing feature RAN11
MIMO Prime feature RAN13
CPC HS-SCCH Less Operation feature RAN11
High CCH Load PCPICH power adjustment parameter ALL
Decrease common channel PO parameter ALL
BLER Limit MPOC adjustment parameter ALL
CQI Adjustment Based on Dynamic BLER Target feature RAN13
Normal Cell
R99 Cell HSDPA feature RAN10
HSDPA Cell
TPE feature RAN12
Downlink enhanced CELL FACH feature RAN12
L2+ feature RAN11
64QAM feature RAN11
MIMO feature RAN11
DC feature RAN12
64QAM+MIMO feature RAN12
DC+64QAM+MIMO feature RAN13
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DL Device Optimization Whole Scenario
Capacity Limit
Aspect Scenario Sub Scenario Optional Solution
Solution
Property Version
Device Resource
Limit
HSDPA user number
Limit
Increase HSDPA CAC user number parameter ALL
Expansion expansion ALL
CE Resource Limit
Admission CE Limit Decrease GBR parameter ALL
Decrease initial Rate parameter ALL
License CE Limit CE Expansion expansion ALL
IUB Resource Limit
IUB Bandwidth Limit
Decrease GBR parameter ALL
Decrease initial Rate parameter ALL
Transmission Active Factor adjustment parameter
IUB expansion expansion ALL
IUB QOS Limit
HSDPA flow control method adjustment parameter ALL
troubleshooting troubleshooting ALL
CODE Limit
power and code allocation method adjustment parameter ALL
Expansion expansion ALL
R99 Code Utility< 70%
HS-PDSCH code expansion expansion ALL
RNC/NODEB HS-PDSCH code Dynamic
allocation parameter ALL
R99 Code Utility> 70%
code adjustment LDR feature RAN11
F-DPCH(SRB OVER HSDPA) feature RAN12
Thank you www.huawei.com
Rules and Actions
Thank you www.huawei.com
Rules and Actions
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Commercial Case
Page 25
HSUPA PO optimization, HSUPA mean throughput increase 8%, and cell throughput
increase 6%, slight improvement of mean RTWP.
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Context
Multi-Carrier Strategy Management
KPI Optimization
UL/DL Capacity Improvement
QoS
Page 26
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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HISILICON SEMICONDUCTOR Huawei Confidential
Page 27
Warmly remind:
As MBB booms, Smart phones cause user behavior change and network traffic explosion,
whereas air interface/transmission resource forms a bottleneck. Thats why we need QoS
management.
Behavior Change Triggers Explosion of Network Traffic
More Usage
Average US Cell phone
User
iPhone
User
Voice Call
70%
SMS
15%
Music 2% Games 3%
Internet 3% Others 3%
Voice Call
40%
SMS
14%
Others 3% Internet 11%
Kindle MID Tablet
Read more Stay longer
Use
more
Games 9%
Music 11%
E-mail 13%
384kbps
2M
300Mbps
GE
Service awareness
Wireless access network
IP bearer network
Core network unawarenes
Massive traffic volume
growth
Enormous network
throughput & traffic
growth will require more
flexible network topology
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HISILICON SEMICONDUCTOR Huawei Confidential
Page 28
Networking Schema for QoS Differentiation Solution
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HISILICON SEMICONDUCTOR Huawei Confidential
Page 29
QoS Load Differentiation Application in VDF Spain
Background:
1.VDF Spain 3G network, > 6M 3G terminals
2.About 1000 users, around Madrid and Malaga.
3.The trial lasts for 4 weeks and 32% of the users downloaded
more than 1GB
Average Throughput per kind of user Impact of QoS activation on Web browsing
Remarks:
1. Significant improvement on average throughput for Gold and Silver users (27% and 10%
respectively) at the cost of a decrease for Bronze class users(-28%)
2. A significant reduction in latency was also obtained for Gold user, in the rage of ~32.44%
with respect to QoS differentiation not applied.
Thank you www.huawei.com
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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KPI Tools Guidance
RRC Access Optimization & Analysis Tool
Call Drop Optimization & Analysis Tool
Page 31
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Per-Process PCHR logs
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Step3 The per-process result show below:
Step1 Setup a task for data pre-process. Menu: Task -> Create pre-process task Select the RNC version
Select the subject
UMTS_PCHR_XXXX_KPI_RRC_XXX Then the task is listed in main window
Step2: Select the task in main window.
Activate the active menu with right click.
and select Start
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Import PCHR per-process data
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Step 1: Create Network, Network
Element. Step 2: Import MML Script and pre-process result data
Step 2.1: Import MML script
Step 2.2: import pre-process result data.
All the data import
success:
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PCHR logs Analysis
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Step 1: Import Analysis Scene file Step 2: Create Analysis task
Analysis task complete, click Download to download and save the PCHR analysis result data.
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Import Performance data Analysis
Project to OMStar
Step 1: Open OMStar
Step 2: Manu Enhancement Maintenance
Platform -> Enhancement Maintenance
Platform
Step 3: In the dialog, select the project
file(*.hsp). In the following dialog, input the
project name and project folder name.
The project import success.
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Performance data Analysis
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Step 1: Click button
UMTS_Network_OptimizationXXX in tab Scene
Application.
Step 2: Set the analysis time, save path, and
select RRC Connect Special Item in open
dialog.
Step 3: in the opening dialog, click button
Threshold to set NodeB configuration
information files save path, and click button
Save to save the setting and then close it.
Step 4: Click button OK to start the analysis.
After the task complete, there are 5 new csv
file in the saving path.
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Access Failure Analysis & Statistics
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Step 1: Save the PCHR analysis
result file and Performance data
analysis result file in the same
folder.
Step 2: Set analysis period.
Step 3: Set threshold and data folder.
Step 4: Click button OK to start analysis. The analysis result file will save in a new folder in the source
data folder.
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Tools Guidance
RRC Access Optimization & Analysis Tool
Call Drop Optimization & Analysis Tool
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How to analysis call drop with tools
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Prepare: RNC configuration script PCHR log of an busy hour for all subracks The RNC version is V9R12/V9R13
Main steps: Pre-process PCHR logs Analysis the call drop Class the scene of call drop Select the scene which you focus on to check the solution in technique guide. Normally, we focus on the scene which lead to lots of call drop.
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Pre-process PCHR logs
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Step1 Import the subject according to RNC version:
Open the subject import interface
Tool
Select the data type of CHR Select RNC version according to current network
Use import command to open the import interface and select the
corresponding **.xml files
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Pre-process PCHR logs
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Step2 setup a task for data pre-process.
Menu: Task -> Create pre-process task Select the RNC version
Select the subject
UMTS_PCHR_XXXX_KPI_RRC_XXX Then the task is listed in main window
Tool
Select the task in main window. Activate the active menu with right click. and select Start
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Analysis the call drop
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Step1 log in the PCHR server
Tool
Step2 Register RNC Menu: Maintenance->NE Register Register the RNC
Register the sub-network at first
Register the RNC
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Analysis the call drop
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Step3 Register subject Menu:Maintenance->Subject Register Management
Import the subject. This subject file is in the result folder of Pre-process. And its name
is :xxx.xml
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Analysis the call drop
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Step4 Import data Menu:->
Tool
Import configuration script at first. Then import the PCHR data which is pre-process by pre-process tools.
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Analysis the call drop
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Step5 Import analysis scene Menu:Maintenance->Analysis task management
Select the corresponding RNC version and create a analysis task.
While the task is finished. Down load the result.
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Class the call drop scene
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Step1 Execute the tool Step2 Import the configuration script and PCHR analysis result
While the tool finish task, there will be a serious files for CS/PS call
drop
Call drop
scene
Call drop sub-scene
Call drop detail signal
process
Ratio of each
call drop
signal process
TOP cell
You can search the suggestion according to the detail signal process