CDT Introduction

Internal Use Only▲

UMTS CDT Introduction


Agenda

Functions of CDT

CDT Future Development Plan

CDT Application in Network Optimization Network Evaluation Cases Subject Analysis Cases

CDT Configuration Principles


CDT System Structure

CDT system consists of three parts, base station/RNC (for reporting data), EMS (for setting data collection function and summarizing data), and server (for collecting and analyzing data). The EMS system delivers the data collection strategy; and the engineer can set the RNC to report data by cell granularity.

When the system is abnormal, the CDT association log would record the failed signaling around the failure point. This record can be used for complaint handling or troubleshooting before the customer complains. This would help to increase the customer satisfactory degree.

Through the MR data of CDT, the engineer can speedily analyze the coverage status of the whole network or of each cell, and can trace the VIP subscribers geographically.


What can CDT data analysis function do?

Analyze and optimize the coverage status of the whole network; analyze and optimize the worst cell.

Locate the subscribers filed the complaint; trace and analyze the signaling during the call.

What can CDT data

analysis function do?

Analyze and optimize the performance of the terminal.

Trace the VIP subscribers and ensure their QoS.

Ultimate target: Reduce the workload of drive tests (DT), and become the first choice for analyzing and locating the network faults.

Internal Use Only▲Advantages and Disadvantages of CDT Data Analysis

CDT DT/CQT OMC Performance

Analysis

Advantage 1.The CDT data is collected from calls in the whole

network. Therefore, it can comprehensively reflect the

real conditions of the network, and can help to accurately

locate the network faults.

2.The CDT data contains the historical data of the

subscribers, which would help to locate the subscriber or

play back the information.

3.The CDT can save a great capacity of data.

4.The VIP subscriber analysis function of CDT can help the

operator to learn the behavior of the high-end

subscribers, their access failures and call drops. This

function can help the operator to improve the QoS for the

high-end subscribers.

DT: The data acquired through DT is accurate, and can reflect the

coverage status along the road.

CQT: It can be used to acquire the coverage status inside the

buildings.

The complaint information can help to solve the network problems

and optimize the network.

1.It can help to learn the

network performance from

the macro angle.

2.It can help to analyze the

worst cells and can help to

learn the cell condition from

the macro angle.

3.The OMC alarm information

can help to discover the base

station faults.

Disadvantag

e

The geographical location of the subscriber is calculated by

the multi-path delay. Thus, certain error may exist.

1.The DT test scope are the passable roads and accessible

buildings. Nowadays, more and more base stations are

constructed in the network, then, the workload of DT increases

dramatically. In addition, the real subscribers are not involved in

the DT.

2. The CQT also cannot cover all spots within the key areas, and it

is a very time consuming and laborious task.

3.The complaint problem does exist. However, it is hard to

reproduce the problem, and it is impossible to get the firsthand

data.

The performance data can help

the operator to get a macro and

direct understanding of the

network, but it cannot present

the network performance in the

user level, and it is hard to

locate the problem.


Functions of CDT

Network evaluation

Coverage index statistics

DL Ec/Io statistics

DL RSCP statistics

UL TxPower statistics

BLER statistics

Coverage association analysis 　 Coverage rate statistics 　 Filtering analysis

UL weak coverage analysis

DL weak coverage analysis

Overshooting analysis Pilot pollution analysis 　 Geography analysis GIS association analysis

GoogleEarth analysis

Subject analysis

Access analysis

Call drop analysis

Call failure analysis Failure type

Service type

TopN analysis TopN subscribers

TopN terminals

TopN cells

Call trace analysis

Terminal analysis

Association analysis 　Customer perception analysis Subscriber KPI analysis

VIP subscriber analysis


Coverage Quality Analysis

Associating with GIS analysis, the engineer can evaluate the network coverage status by collecting and analyzing the DL RSCP, Ec/Io, and UE TX power during the calls, and can locate the weak coverage cells and pilot pollution areas.

Coverage quality of the whole network

Coverage association analysis

Ec/Io

RSCP

BLER

TX Power

Network evaluation

Coverage data statistics Overshooting

Weak coverage

Pilot pollutionCoverage

issues


Analyze the DL RSCP status.

Coverage Quality Analysis

Geographically render the RSCP in the whole network.

Specify the conditions to find the weak coverage areas. Locate the weak coverage area in the

network.


Subject Analysis for Radio Network Faults

Terminal

Subscriber

Geographical position

The CDT data analysis function starts from the TopN statistics, and can speedily analyze the collected data in four aspects. After the preliminary analysis is complete, CDT would use the Call Trace function to further analyze the data.

Fault causes

Problem Problem phenomenaphenomena

Call TraceCall Trace


Analyze the subscribers with TopN access failure rate.

Access Failure Analysis By associating the TopN subscribers, TopN causes, and current radio environment, the engineer can ascertain the root causes of the network faults, find out the internal rules, handle the customer complaints and some inherent problems of the network.

Access failure analysis

Analyze the TopN causes that lead to access failure.

Analyze the causes for access failure.Analyze the radio access environment


Call Drop Analysis The analysis of call drop is similar to that of access failures. It can be analyzed through the following aspects: TopN cells, subscribers, terminal manufacturer, and call trace. Together with the GIS system and playback of the detailed signaling before the call drop, the network optimization engineer can speedily diagnose the network problems.

Call drop analysis


Terminal Capability Analysis With the IMEI and information about the terminal manufacturer and terminal type, the engineer can locate the network failures caused by the terminal, such as access failures and poor handover or PS service quality. This function is especially important for diagnosing the network failures caused by bandit phones.

Terminal analysis


Analysis of the Call Behavior of the Subscribers The learning of the subscriber’s call behavior can help the operators to provide better services. The operator can collect detailed data about the service used by the subscriber, can speedily handle the customer complaints, can protect the main service areas of the VIP subscribers, and can provide diversified services for the targeted areas and at different time periods.

Subscriber call behavior analysis


Agenda

Functions of CDT





2010Q2 2010Q3 2010Q4 2011Q1

CDT Enterprise V2.31. Improve the fault

location function of CDT.

2. Improve the geographic location precision.

3. Improve the study on pilot pollution.

CDT Enterprise V2.41. Improve GIS

function.2. Analyze users’

behaviors.3. Analyze Hidden

faults.

CDT Enterprise V2.51. Support the KPI report

of the network manager.

2. Able to access the terminal via internet.

3. Analyze data intelligently.

4. Analyze the users’ perception.

CDT Enterprise V2.21. Analyze the VIPs.2. Analyze based on

subjects. (overshooting, weak coverage, and pilot pollution).

3. Analyze the terminal.

NDS (V1.0)1. Corresponding to RNC V3

NDS(V2.0)1. Corresponding to RNC V4



Introduction of CDT Future Key Functions More detailed description of the causes leading to the faults.

GIS function optimization including the improvement in function and usability improves the analysis efficiency.

Extracting the users’ traffic models.

Finding and locating the malicious users.

Integrating with the function of OSS network optimization sub network such as the analysis of the information from configuration center, monitoring center and report center. Locate the problem based on data such as alarms.

Able to access the terminal via internet, which facilitates its deployment and remote access.

Intelligent and automatic fault diagnosis facilitates the problem solving.

Evaluating and analyzing users’ perception.


Agenda

Functions of CDT





Network Evaluation - Weak Coverage Analysis

Filter weak coverage cells

RSCP & Tx Power associate analysis


Call sheet analysis of VIPs in this area

Network Evaluation - Pilot Pollution Analysis

BLER of Big puddle village 3rd >3%

Pilot pollution exists based on DT results


Network Evaluation - Overshooting Analysis

Filtering analysis of overshooting

Geographic display of overshooting spots


Agenda

Functions of CDT





Subject Analysis - Low Call Completion Rate

Luohu site


Associate call trace analysis

Subject Analysis - Low Call Completion Rate Analysis

Analysis of no response at Iub

Back-ground alarms confirm the results

Internal Use Only▲Subject Analysis -Analysis of Call Drops due to Weak Coverage


Subject Analysis - Low Call Completion Rate Cases

Analysis of Uu configuration not supported

This is the Luohu checkpoint, and the problem is caused by frequent registration of invalid users.

Internal Use Only▲Subject Analysis – Analysis of Call Drops due to Missing Intra-frequency Neighbor Relation Configuration

TopN cellTopN cause analysis

Internal Use Only▲Subject Analysis – Analysis of Call Drops due to Missing Intra-frequency Neighbor Relation Configuration



Analyze users’ call trajectory

Subject Analysis - Analysis of Call Drops due to Missing Intra-frequency Neighbor Relation Configuration

Confirm neighbor cells

Internal Use Only▲Subject Analysis - Analysis of Call Drops due to Wrong Neighbor Relation Configuration

Call drop TopN cells Associate call drop TopN causes

Internal Use Only▲Subject Analysis - Analysis of Call Drops due to Wrong Neighbor Relation Configuration


Internal Use Only▲Analysis of Call Drops due to Wrong Neighbor Relation Configuration

Associate geographic analysis

Confirm neighbor relation


Agenda

Functions of CDT





Networking Scheme CDT independent networking

There are only a data collection server and an analysis server, which costs little, and is suitable for the network with unlimited network connection in the global RNC and with comparatively small capacity.

There are only a data collection server and an analysis server in every equipment room. Taking the layout of the operator’s equipment room, data volume, and the network bandwidth of the equipment room into consideration, this scheme is reliable but costs much.

Co-networking NDS-U (data collection server) and NetMAX-U analysis server can be

installed in one computer, which costs little and is suitable for the network with little capacity demand.

Note: NDS-U and NetMAX-U can’t be installed in the computer in which the network manager is installed, and the reasons are:

1. It may affect the stability of the network manager’ operation.

2. The hardware of the network manager can’t support it.


Collection Server Configuration PrincipleNo Item Code Unit Model-Large

1 Unix Server SUN V490 SET 1

2 HBA

Sun StorageTek PCI-E Enterprise 4Gb FC Dual ch HBA(PN:SG-XPCIE2FC-QF4)/for use in T2000,T5220 ： Sun StorageTek PCI-E Enterprise 4Gb FC Dual ch HBA(PN:SG-XPCIE2FC-QF4)/2*15M LC to LC FC Optical Cable(X9734A-Z);standard

KIT 0

3 Disk Array

SUN ST6140 FC Disk Array/3 Yr Standard Support ： Dual Contorller/2*2G Cache/5*300G 15Krpm/2*5M LC-LC Fibre Cable/Dual Power Supplies/Rack Kits/PDM:500000680122;not recommend

KIT 0

4 Hard Disk

SUN 300GB 15Krpm FC-AL drive(PN:XTC-FC1CF-300G15KZ)/RoHS-6/for use in Sun ST6140 array/Stadard Support ： SUN 300GB 15Krpm FC-AL drive(PN:XTC-FC1CF-300G15KZ)/RoHS-6/for use in Sun ST6140 array/Stadard Support;not recommend

KIT 0

5 Server Rack (220V/AC) 　 KIT 0

6 KVM

ATEN CL5708M/3 year warranty ：Interface:USB;Power:AC;others:LCD:17";Resolution:1280*1024;Prot number:8;signal cable:8 ,1.8M ;3 year warranty;;standard

SET 0

7 Switch WS-C2960-24TT-L KIT 18 Router CISCO2811 SET 0


Analysis Server Configuration PrinciplesNo Item Code Unit <=12000 Cell >12000 Cell

1 Unix Server

SUN T5220/1 yr backup component service ：rack:/;display:/;CPU:8*1.2GHz;memory:32GB(16*2GB);Harddisk:2*146GB(SAS 10K 2.5");others:DVD/4*1000M Integrated NIC/4*1000M NIC/Dual Power Supply)/PDM:500000694744;;standard

SET 1 1

2 HBA

Sun StorageTek PCI-E Enterprise 4Gb FC Dual ch HBA(PN:SG-XPCIE2FC-QF4)/for use in T2000,T5220 ： Sun StorageTek PCI-E Enterprise 4Gb FC Dual ch HBA(PN:SG-XPCIE2FC-QF4)/2*15M LC to LC FC Optical Cable(X9734A-Z);standard

KIT 1 1

3 Disk Array

SUN ST6140 FC Disk Array/3 Yr Standard Support ： Dual Contorller/2*2G Cache/5*300G 15Krpm/2*5M LC-LC Fibre Cable/Dual Power Supplies/Rack Kits/PDM:500000680122;not recommend

KIT 1 1

4 Hard Disk

SUN 300GB 15Krpm FC-AL drive(PN:XTC-FC1CF-300G15KZ)/RoHS-6/for use in Sun ST6140 array/Stadard Support ： SUN 300GB 15Krpm FC-AL drive(PN:XTC-FC1CF-300G15KZ)/RoHS-6/for use in Sun ST6140 array/Stadard Support;not recommend

KIT 8 11

5 Switch WS-C2960-24TT-L KIT 1 1

6 Router CISCO2811 SET 0 0

8 Oracle DB Oracle EE 10g for Sun Solaris(SPARC)/2CPU/One year Service ： Host:Sun Solaris(SPARC)/64bit/2CPU;standard KIT 1 1

9 MAPX V4.5.1 License　 KIT 1 1


Configuration Proposal

Region Circle CellMR&CDT

NDS(Data Collection)

NetMax(Data Analysis)

East(Kolkata)

Assam 1221

11469

1

1

Bihar 2537 1Kolkata 3928 1North East 807 1Orissa 1365 1West Bengal 1611 1

North(Delhi)

Delhi 5345

17568

1

1

Haryana 1339 1

Himachal Pradesh 495 1

Jammu & Kashmir 1381 1

Punjab 2370 1Uttar Pradesh (East) 3898 1Uttar Pradesh (West) 2740 1

West(Mumbai)

Madhya Pradesh 2731

20048

1

1

Maharashtra 5087 1Gujarat 4415 1Rajasthan 2488 1Mumbai 5327 1

　 Grand Total 49085 　 18 3


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CDT Introduction

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