164162520 UMTS Network Performance Optimization Solution for Presentation

HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

Security Level:

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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


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Context


KPI Optimization

RRC Access Call Drop


QoS

Page 4


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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


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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


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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


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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


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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


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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%


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Context


KPI Optimization

RRC Access Call Drop


QoS

Page 12


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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.


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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.


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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.


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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.


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Context


KPI Optimization


QoS

Page 17


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UL R

adio

capacity

Lim

ited

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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

1.Add text in here

2.Add text in here

3.Add text in here

1.Add text in here

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


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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


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


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


Solution

Property Version

Device Resource

Limit

HSDPA user number

Limit

Increase HSDPA CAC user number parameter 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


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


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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


KPI Optimization


QoS

Page 26


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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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Page 28

Networking Schema for QoS Differentiation Solution


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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


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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

Page 32

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

Page 33

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

Page 34

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.

Page 35


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Performance data Analysis

Page 36

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

Page 37

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

Page 38


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How to analysis call drop with tools

Page 39

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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Page 43

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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Page 44

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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Page 45

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

Page 46

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

164162520 UMTS Network Performance Optimization Solution for Presentation

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