Equipment for testing mobile qos
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Equipment for Testing Mobile QoS. Joachim Pomy [email protected] OPTICOM, Germany. ITU Workshop on “Monitoring and Benchmarking of QoS and QoE of Multimedia Services in Mobile Networks” (Buenos Aires, Argentina, 24-25 July 2014). [Content].

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Equipment for Testing Mobile QoS

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Equipment for testing mobile qos

Equipment for Testing Mobile QoS

Joachim Pomy

[email protected], Germany

ITU Workshop on “Monitoring and Benchmarkingof QoS and QoE of Multimedia Services in Mobile Networks”

(Buenos Aires, Argentina, 24-25 July 2014)

Buenos Aires - Argentina - 24 - 25 July 2014


Equipment for testing mobile qos

[Content]

ITRs: Setting the stage for a connected world

Buenos Aires - Argentina - 24 - 25 July 2014

  • Equipment for Testing Mobile QoS

    • Measurements

    • Test Scenarios

    • Trigger Points

    • Test Equipment

    • Testing for various Services

    • Practical Hints

    • POLQA - Voice Quality - Hot Topic


Measurement of qos in mobile

Measurement of QoS in Mobile

  • Measured from the perspective of an expert

  • Assessing the network to see if it delivers the quality that the network planner targeted (cf. Rec. ITU-T G.1000)

  • Tools and Methods for Operation and Maintenance

    • Protocol analysers are connected to BTSs, BSCs, and MSCs for a period of time to check for problems in the cellular network

    • Drive test (also walk tests) are used for monitoring operationally achieved QoS

Buenos Aires - Argentina - 24 - 25 July 2014


Measurement of qos in mobile1

Measurement of QoS in Mobile

  • Drive tests allow the mobile network to be tested through the use of a team of people who take the role of users

    • Rate the QoS of the network

    • Not applicable to the entire network

    • Always a statistical sample

  • In Operation and Maintenance Centres (OMCs), counters are used for various events

    • Providing the network operator with vendor specific information on the state and quality of the network

  • Also, customer complaints are a vital source of feedback on the QoS, and must not be ignored

Buenos Aires - Argentina - 24 - 25 July 2014


End to end qos testing in mobile

End-to-end QoS Testing in Mobile

  • Minimum requirement for QoS measurement equipment to ensure that

    • for all QoS parameters

      • trigger points are well defined

      • values are determined following wqell defined procedures

  • Test-equipment fulfilling the specified minimum requirements

    • Will allow performing the proposed measurements

    • In a reliable and reproducible way

Buenos Aires - Argentina - 24 - 25 July 2014


Parameters are based on field measurements

Parameters are based on Field Measurements

  • Measurements from customers point of view

    • Full End-to-End perspective, taking into account needs of testing

    • Assumed end customer can handle his equipment and services to use

    • Operability is not evaluated at this time

    • For the purpose of measurement it is assumed that

      • service is not barred for any reason

      • routing is defined correctly without errors

      • target subscriber equipment is ready to process service request

      • speech and video quality values measured

        • Only to be applied to calls ended successfully

        • In order to receive proper statistical analysis

Buenos Aires - Argentina - 24 - 25 July 2014


Not yet any itu standards in place

Not yet any ITU Standards in Place

  • ETSI TS 102 250 part 4

  • Speech and multimedia Transmission Quality (STQ); QoS aspects for popular services in GSM and 3G networks; Part 4: Requirements for Quality of Service measurement equipment

    • globally recognized as "the requirement" in the area

    • extremely compehensive

    • detailed instructions

Buenos Aires - Argentina - 24 - 25 July 2014


Equipment for testing mobile qos

[Content]

ITRs: Setting the stage for a connected world

Buenos Aires - Argentina - 24 - 25 July 2014

  • Equipment for Testing Mobile QoS

    • Measurements

    • Test Scenarios

    • Trigger Points

    • Test Equipment

    • Testing for various Services

    • Practical Hints

    • POLQA - Voice Quality - Hot Topic


Test scenarios

Test Scenarios

  • Test scenarios need to distinguish the following principal user cases

    • User-to-user services (typically telephony)

    • Store-and-forward services (e.g. SMS)

    • Information services (e.g. accessing the internet or FTP download)

    • Push services (sender initiated transfer)

Buenos Aires - Argentina - 24 - 25 July 2014


Equipment for testing mobile qos

[Content]

ITRs: Setting the stage for a connected world

Buenos Aires - Argentina - 24 - 25 July 2014

  • Equipment for Testing Mobile QoS

    • Measurements

    • Test Scenarios

    • Trigger Points

    • Test Equipment

    • Testing for various Services

    • Practical Hints

    • POLQA - Voice Quality - Hot Topic


Considerations on trigger points

Considerations on trigger points

  • It can be assumed that

    • any feasible test equipment will contain some kind of communication terminal (UE) which may be a special type (e.g. a Trace Phone)

    • or a standard UE

  • Also, it can be assumed that each such device will provide information from different communication layers

    • from Application Layer (close to the user interface)

    • down to lower layers, e.g. operating-system events, TCP/IP layer, or Layer 3 signalling information, which is used as trigger points for QOS PARAMETERS processing

    • Typically AT commands can be used in majority of cases

  • Action is typically triggered

    • by some emulated user action

    • causing some action on the air interface

Buenos Aires - Argentina - 24 - 25 July 2014


Considerations on trigger points1

Considerations on trigger points

  • Process of event propagation is deterministic

    • allowing for kind of mapping between layers

    • associated with communication and processing delay in each stage.

  • Choice of the layer for trigger point information retrieval

    • determines the view expressed in a QOS PARAMETER

    • choosing lower-level events ( Layer 3) gives more network-centric view

    • events on higher levels to produce views more user-related

    • for same QoS PARAMETER source layer for events used as trigger points should be the same

  • In benchmarking, for all all networks under test

    • use same type of UE, and QOS PARAMETERS

    • use trigger points from the same layer.

  • Changing the source layer for a given trigger point

    • changes in QOS PARAMETERS should be expected

    • calibration measurements required

      • to assess influence on QOS PARAMETERS both quantitatively and qualitatively.

Buenos Aires - Argentina - 24 - 25 July 2014


Equipment for testing mobile qos

[Content]

ITRs: Setting the stage for a connected world

Buenos Aires - Argentina - 24 - 25 July 2014

  • Equipment for Testing Mobile QoS

    • Measurements

    • Test Scenarios

    • Trigger Points

    • Test Equipment

    • Testing for various Services

    • Practical Hints

    • POLQA - Voice Quality - Hot Topic


Mobile qos test equipment mqt

Mobile QoS Test-equipment (MQT)

  • Geographical data collection during a mobile measurement

    • Position, speed and heading

    • Taken from GPS whenever possible.

    • If no GPS available use other tools

      • e.g. navigation on a geo-referenced bitmap

Buenos Aires - Argentina - 24 - 25 July 2014


Equipment for testing mobile qos

[Content]

ITRs: Setting the stage for a connected world

Buenos Aires - Argentina - 24 - 25 July 2014

  • Equipment for Testing Mobile QoS

    • Measurements

    • Test Scenarios

    • Trigger Points

    • Test Equipment

    • Testing for various Services

    • Practical Hints

    • POLQA - Voice Quality - Hot Topic


Telephony voice

Telephony Voice

  • Means to generate necessary calls or to answer automatically incoming calls

  • Received speech sample is measured

    • via the analogue output of the User Equipment

    • hardware setup to include necessary electrical adaptation

  • Hardware setup of such a system is essential for the correctness of the measured QoS Parameters

    • Includes a UE specific part for the electrical adaptation

      • audio output of handset to input of the soundcard

Buenos Aires - Argentina - 24 - 25 July 2014


Video telephony

Video Telephony

  • Means to generate necessary calls or to answer automatically incoming calls

  • Capability to provide the following measurement methods.

    • Video Telephony using the User Equipments application; or

    • Video Telephony using a Video Telephony Stack on the PC.

Buenos Aires - Argentina - 24 - 25 July 2014


Mqt for ftp

MQT for FTP

  • FTP client to support the following functions:

    • Active / Passive Mode

    • Common Firewall support

    • Downloading from subdirectories.

    • Uploading to subdirectories

Buenos Aires - Argentina - 24 - 25 July 2014


Mobile based measurement equipment

Mobile based measurement equipment

  • Functionalities of the MQT can also be realised on a single mobile phone

    • Different types of QoS tests can run

    • Test results can be logged for post processing

    • Mobile based measurement equipment may be controlled

      • by an application, remotely or

      • may be operated by a human

Buenos Aires - Argentina - 24 - 25 July 2014


Equipment for testing mobile qos

[Content]

ITRs: Setting the stage for a connected world

Buenos Aires - Argentina - 24 - 25 July 2014

  • Equipment for Testing Mobile QoS

    • Measurements

    • Test Scenarios

    • Trigger Points

    • Test Equipment

    • Testing for various Services

    • Practical Hints

    • POLQA - Voice Quality - Hot Topic


Practical hints

Practical Hints

  • Which Mobile Phone to use ?

    • should be one offered in the shop ?

    • should be one used by new customers ?

    • should be one hipe to young people ?

    • should be one with good QoS ?

  • BUT

    • it MUST be a so-called Trace Mobile

    • ASK YOUR PHONE PROVIDER !!!

      • they are RARE !!!!

Buenos Aires - Argentina - 24 - 25 July 2014


Equipment for testing mobile qos

[Content]

ITRs: Setting the stage for a connected world

Buenos Aires - Argentina - 24 - 25 July 2014

  • Equipment for Testing Mobile QoS

    • Measurements

    • Test Scenarios

    • Trigger Points

    • Test Equipment

    • Testing for various Services

    • Practical Hints

    • POLQA - Voice Quality - Hot Topic


Any questions

Any questions ?

Contact:[email protected]

Buenos Aires - Argentina - 24 - 25 July 2014


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