generation field testing

7/27/2019 generation Field Testing

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FIELD TESTING

of2G 3G Devices


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Field Trials conducted on terminals ensure that the interoperability of

the terminal with the public networks will be robust and minimizes

returns from the market.


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Development Cycle

Product

Planning

Product validation

( Field Testing)

Product Validation

(LAB Testing)

Final QA

Commercial Sample

QA

Platform Design & Reference ArchitectureFull protocol stack and man machine interface softwareFunctional and Performance Specifications

Protocol Testing (RF/USIM/Protocols)Pre-Conformance-physical & signaling)Power consumption testing

Live Network TestingIOTInter-RATField TrialsKPIDATA performance testing

Check All the Reported issues should beclosed.

Carrier approval confirmation.Operator Acceptance.

A quick review of all the major issuesReported.Field Trial.OEM/Operator Specific requirement.Production Issues.


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Live Network Field Trials & IOT

Field Testing is carried out with the product connected to a live network in real

conditions. Field trials give confidence in end to-end product performance. This

highlights software quality and stability issues and how the product performs for the

customer. This testing can be carried out to customer-specific requirements, network

operator requirements or to the GCF field trial recommendations.

References :

DG 11Field Trial Guidelines

3GPP org

Test Case provided by:

OEM/ODM

Operator Acceptance User Acceptance (UAT)


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Features Tested in a Field Trials

Some of the features tested in a field trial are:

Cell selection and reselection Network selection

Location updating

Speech quality (FR / HR / EFR, AMR)

Roaming

Hand over (GSM/GPRS)

Signal strength

Routing area updates for GPRS

GPRS attach and detach

GPRS PDP activation and deactivation

Verification of different QOS Parameters.

TCP/IP traffic (UL/DL) with different Multi slot configurations GPRS Authentication


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Field Test Preparation

Field test objective definitions (Performance Test: RF Drive test, Call

Test )

Diagnostic monitor*

Laptop computer

Test and reference mobiles, chargers, extra batteries, etc.

Mass storage device GPS receiver ( For guided RF Drive Test , normally applicable to

typical topographies)

Data/RF cables

Dual UART for data testing

Extension cord (s)

USIM/ RUIM card reader/writer along with its software (for RUIM-

capable mobiles)


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Field Testing Tools

Phone Flashing Tool:

Generally these tools are used to download or upgrade the software in phone using desktop/laptop

with the help of data cables. Logging/Tracing Tool:

Tracing tool are used to capture the message of device, exchanged between the different layer and

with network while in operation .This help in debugging the errors and problem with the device or

network.


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Field Testing Tools

DUT and reference device:

During a testing phase of a device there should be a reference model for benchmarking and

comparing the performance of the DUT.

Engineering Mode:

Engineering Mode is designed to allow a field engineer to view and test the network

information received by a handset, when the handset is either in idle mode or dedicated mode

(that is: with a call active). In each mode, the engineer is able to view network interaction for

the serving cell (the cell the handset is currently registered with) or for the neighboring cells.Test cases:

Test Case of OEM/ODM (Open Market)

Test Case Operator Acceptance (operator specific)

QM Management tool:

Web based Defect tracking tool, Repository & Centrally Controlled Tool

Organize & Manage all Phases of Testing Process

Specifying Testing Requirements

Planning Tests

Executing Tests

Tracking Defects (e.g.. Test Director)


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Test Environment

Dense Urban

Dense urban environments consist of lots of multi paths, and 4-, 5-, and 6-way handoffs arehighly visible. Also, the network is usually loaded.

Urban

Urban environments also have enough multi paths to test 3-, 4-, 5-, and 6-way handoffs. The

network is usually loaded, as well.

Suburban

There are some multi paths present in suburban environments, but not a lot. Usually, 1- or 2-way

handoffs are normal, and the network is lightly loaded. The mobile may not be locked to one

active Pilot in traffic.


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Test Environment (Contd..)

Stationary Environment (MP)Stationary environments can be divided into near, middle, and farscenarios.

Good (near) coverage area, Rx -70 dBm or better

Medium (middle) coverage area, Rx -70 to -85 dBm

Poor (far) coverage area, Rx -85 to -103 dBm

Most mobile feature and conformance testing is done in a good

GSM/WCDMA coverage area.

Moving Environment (MR)

Moving environments are very dynamic, and most mobile field testing is carried out in

moving conditions.

2545 km/h

4565 km/h

65100 km/h

Variable speed


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Drive test Route Selection

Test Route

A test route is a prescribed traveling/driving route in a GSM/CDMA/WCDMA coverage area usedfor field testing in a real, dynamic RF environment.

Depending on the feature being tested and the test equipment involved, the test route can be walked.

The test route plays a key role in field testing.

Most field testing of network features can be performed in a stationary location in a goodGSM/CDMA/WCDMA coverage area.

A drive route may consist of, but is not limited to, these features:

Various received signal strengths along the drive route (coverage

areas)

Known cell site locations

Soft/softer handoff areas

Boundaries of hard handoff, idle handoff, SID/NID, Zone and IP

registrations, etc.

Various vehicle speeds along the drive route (stop signs, intersections,

freeways, boulevards, etc.)

Single- and dual-mode areas, CDMA ,GSM,WCDMA, etc.

GSM, CDMA,WCDMA boundaries and vice versa


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Quality of Service Testing

Network Services are considered end-to-end, this means from a Terminal Equipment (TE) to

another TE. An End-to-End Service may have a certain Quality of Service (QoS) which isprovided for the user of a network service. It is the user that decides whether he is satisfied

with the provided QoS or not.

To realize a certain network QoS a Bearer Service with clearly defined characteristics and

functionality is to be set up from the source to the destination of a service.

A bearer service includes all aspects to enable the provision of a contracted QoS. These

aspects are among others the control signaling, user plane transport and QoS management

functionality.

Measuring Voice and Data Service Quality

Traditionally, wireless operators have used a number of metrics that collectively provide a

measurement of network service quality from the user perspective. Various operators may

define and measure network performance somewhat differently, but overall service quality

will generally be determined by a combination of the following four key performance

indicators (KPIs).

System coverage

Call blockage

Voice quality

BER bit error rate


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Data throughput measurements

Downlink Performance under Mobility Conditions Description

Verify the downlink data performance of EGPRS implementation in live networks.

Reason for test

To ensure that the downlink GPRS/EGPRS/HSDPA data throughput of the ME under test is acceptable undermobility conditions.

Initial configuration

The MS is GPRS and IMSI attached.

Use the MS in tethered mode as a modem for laptop

Identify a route with 2-3 cell reselections and a Routing Area Update

Test procedure

1. Activate PDP Context

2. Start on the identified route

3. Use DOS FTP to download a 2-15MB file. If possible, utilize a server with minimal latency to the GGSN.

4. Repeat the test 5 times, record the average FTP throughput.

Expected behavior

1. The results of this test are highly dependent upon the number of cell reselections, RAU, and average signalstrength along the drive route. Average downlink throughput under mobility conditions for a two-slotdevice should exceed 40 kbps, three-slot devices should exceed 55 kbps, and four-slot devices shouldexceed 70 kbps averaged over five FTPs.

2. The data histogram for each test run should indicate relatively few data stalls in excess of 10 seconds.

3. The GPRS connection and file download shall be stable during cell reselection and RAU


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Call Performance Criterion

All The Short/Medium/Long Call Made during A CP Test Should be under following Test

Condition

Half Rate Channel

Full Rate Channel Enhance Full rate Channel

RX Sensitivity (RxLev and Rx_Qual)

Short/Medium/Long Call Made during A CP Test Should be under following Test

Condition

Attempt Call in Low Network Area and low RxQuality when

Rxlev


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Application Testing

Application testing and signing programs perform testing at the application-acceptance-

testing level to ensure that your application meets the models requirements. This means

that Symbian Signed and Java Verified Program criteria documents must be used when

considering application requirements.

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