06_umts services and applications_emad

7/30/2019 06_UMTS Services and Applications_emad

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1 NOKIA CTXX 5327en 3.0.PPT/ 17.12.2002 / Bjrn Wigforss

UMTS Services andUMTS Services andApplicationsApplications


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Topics

Introduction to mobile applications

Virtual Home Environment (VHE) Was is a Virtual Home Environment?

(UMTS) SIM Application Toolkit ((U)SAT)

Mobile (Station Application) Execution Environment (MExE)

Wireless Application Protocol (WAP)

Customised Application for Mobile Network Enhanced Logic

Open Service Access (OSA)

User Location

Location Service (LCS)

Location Based Services (LBS)

Potential applications


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ObjectivesAfter this module the student will be able to:

Outline the Virtual Home Environment Concept (VHE) Briefly explain the difference between a tele-, bearer- and

supplementary service within the VHE concept

Name the UMTS services

Sketch the ideas of (U)SAT, MExE, CAMEL, and OSA.

without using any references.


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Introduction


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What motivates the implementation ofapplications?

Services today - Phone calls, SMS, WAP and IN (Intelligent Networks)

Subscribers More applications create a greater value

Operators Growth in more usage via applications

Today's networks offer ~10 products, within a few years hundreds.

GSM & GPRS networks provide 'bearers' to supportdifferent uses

Applications are already here today - UMTS will bring withit better capability to enable different types of services

Student Exercise:

List all the services that you use today. Are there any new servicesyou wish to have?


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What are UMTS Services?

circuit switched services, which are the teleservices, such as- speech call,- facsimile call,- emergency call,- cs data

packet switched services, which are the PDP contexts

message services, including SMS and CBS


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Definition of a telecommunication service BEARER - telecommunication services providing the capability of

transmission of signals between access points.

TE MT PLMNPossible

transit

network

Terminating

network

Bearer services

Teleservices

UE

UE: User EquipmentMT: Mobile TerminationTE: Terminal EquipmentTAF: Terminal Adaptation Function

TETAF

TELESERVICES - telecommunication services providing the completecapability for communication between users according to specifiedprotocols.

SUPPLEMENTARY SERVICES - modifies or supplements a basictelecommunication service.


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Basic GSM/UMTS services

Category ofteleservice

Individual teleserviceType of userinformation

No Name No Name

Speech 1 Speechtransmission

11

12

Telephony

Emergency Calls

Short message 2 Shortmessageservice

21

22

23

Short message MT/PP

Short message MO/PP

Short message cell broadcast

Facsimile 6 Facsimile 61 Alternate speech and facsimile group3

T

NT

transmission 62 Automatic facsimile group 3 T

NT

Speech 9 Voice Group

service

91

92

Voice Group Call Service

Voice Broadcast Service


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What is a potential service model? Seamless services and

applications

Open environment -separate services from theunderlying network

GSM applications a basisfor future applications

New applications, andmore variation of existingservices can be addedthanks to new capabilitiesin UMTS/3G

Terminal & USIM

Service Platform

Applications

3G Network

Service Platform

Applications

Content Content

Access Methods:- WCDMA- GSM900/1800- etc.

Open / Proprietary Interface

Open Interface

UE Node B RNC

Uu Iub/Iur Iu

Core Network


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Application Provider Model

Student Exercise:Are there any content providers that you use on an regular basis?

Some applications will be offeredby the operator itself.

Many applications will be providedby third party providers (eitherdedicated to the operator, or moreindependent).

What kind of applications are more likely to be offered by the operatorthemselves, and what services will be supplied by other providers?

Bearer/Carrier Provider

(3G Network)

Application Provider

Content Provider Content Provider Content Provider

Application Provider Application Provider

End-Users


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Mobile Service Platform, today

Fiber Fiber

AXC

MWR

ATM Access

Internet

RANCore Network

Control Plane

Gateway Plane

PSTN

2GSGSN

3GSGSN GGSNRNC

BSC

Node B

BTS

Node B

HLR

3GMSC

NMS

VoiceServers

Service Creation& ExecutionPlatform

SCP

Service DeliveryPlatform

Also other equipment will be used; VMS, service delivery platforms, service creationand execution platforms, etc.

The WCDMA air interface will have a greater capability to enable the bearer requiredfor a certain service.


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What kind of UMTS applications areenvisioned today?

News & traffic flashes

Public video phoning

Ticketing services

Interactive shopping

Desktop video conferencing

Student Exercise:Can you give examples of supplementary services in today'snetworks?

Voice recognition & response

Interactive & virtual school

Universal SIM & credit card

Virtual banking

Currency downloading

Video on demand

On-line library & books


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Virtual Home Environment


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Enjoy a large number of diversified services

Seamless access tomy services from

different networks

Familiar "look and feel"ofmy services from

different terminals

My services areavailablewherever I am

My service profilecan be managedand configured by myself

Virtual Home Environment (VHE)


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Virtual Home Environment

The key aspects of VHE can besummarised:

personalised services

personalised user interfacewithin the capabilities ofterminals

consistent set of services fromthe user's perspective irrespectiveof access (e.g. fixed, mobile,...)

global service availability


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VHE mechanisms toolkits

SIM Application Toolkit (SAT) CAMEL - Customised Application for Mobile network Enhanced Logic

MExE - Mobile Execution Environment

OSA (Open Service Access)


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Mobile Service Architecture from the BearerPoint of View

contentcontent

serviceplatformapplication related signalling and content transfer

Gateway(GGSN, GMSC)UMTS releated bearer

and call controle.g. for a PDP context

RAN CN

UMTS Bearer Service

RAN bearer CN bearer

external Bearer Service

external networkse.g. PSTN, PDN,WAP and MMS infrastructure


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Mobile Equipment, USIM andOperating Systems

USIM - Open interfaces to the applications

running in the terminal, it should be possible toremotely modify some user- or service-relatedinformation.

ME - Support for both packet-and circuit-switched services (normally).

- Operating system candidates: Symbian / EPOC (Nokia 9210 OS)

Windows CE (Consumer Electronics)

3Com / Palm


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SIM Application Toolkit

First standardised in GSM phase 2+ specifications by

ETSI/3GPP (11.11 and 11.14). Enables the operator to remotely update the SIM, alter and

download services.

Specified APIs ME-SIM

Increases the subscriber's possibility to, for example, changeservice profile.

SMS is a key mechanism in SIM Application Toolkit.


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SAT example in GSM - Weather forecastservice

1.Set up Menu

2.Show menu

3.User Selects

4.Menu Selection

5.Select Item6.Show list

7.User selects8.Select Reply

9.Send SMS

10. SMS sending

11. SMS Download

12. SMS PP Download

13. Display Text

14.Show text


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Mobile Station Application Environment(MExE)

Provides comprehensive and standardised environment on the

mobile equipment (ME). MExE enables application execution using WAP and Java.

Enables operator/service provider specific services.

Supported by Nokia, Motorola, Lucent Technologies and Nortel.


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WAP

WWWServer

WAPuser

agent

WAPGateway

response (WML)

coded request (URL)URL request

coded response (bin. WML)

decoding

coding

unified standard

bearer independent

security features

efficient protocol for radio interface adapted content presentation


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WML

Internet-Content:Hypertext Markup Language HTML

- large pages- each page uniqueaddress (URL)

- texts &pictures- links- programs

HTML

pagestoobig

pagestoobig

Internet-Content for mobiles:Wireless Markup Language WML

WML-Cards instead ofHTML-pages

(Browser)Last Name:

Moonen|

OK alpha

(Browser)Which language doyou want to use ?

[English]

OK

(Browser)

1 Last Name

2 First Name

3 Department

Edit Find

Several Cards =one Deck = URL

(Browser)

1 Last Name

2 First Name

3 Department

Edit Find

(Browser)

1 LastName

2 FirstName

3 Department

EditFind


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CAMEL Architecture (simplified)home PLMN

interrogating PLMN

SCP

HLR

MSC/VLR GMSC

visited PLMN

SSP SSP

incoming lineroaming legoutgoingleg

(MOcall)

MAP

MAP

CAP

MAP

CAP

VLR

MAP


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Open Service Access (OSA)

OSA is a standard for communication between the applications and the network

through an API. The Application Programming Interfaces (API) is a set of standard procedures and

functions which support third party applications.

Advantage of OSA: New application development is independent of thenetworking technologies, and new application development can utilise off-the-shelf products.


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ApplicationServer

Application Server OpenServiceAccess(OSA)

Fiber

Core Network

2GSGSN

3GSGSN GGSN

HLR

3GMSC

VoiceServers

Service Creation& ExecutionPlatform

SCP

Service DeliveryPlatform

Core Network

Service Capabilities

bearers in accordance to QoSparameters

mechanisms for making servicesavailable

Appli-cation

Appli-cation

Appli-cation

Appli-cation

Appli-cation

Application Server

access via open APIs


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Location services - Methods

Cell ID based method

Positioning with the help of the serving base station

OTDOA-IPDL - Observed Time Difference of Arrival - Idle PeriodDownlink - (mCatch)

Frame timing (that is, with System Frame Number)

Triangulation estimate (50 - 70 metres accuracy)

Idle periods in serving base station increases the chance for measurementsof surrounding base stations.

GPS - Global Positioning System

Accurate, but limitations indoors and during bad weather conditions

Terminals may be equipped with GPS receivers.


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Location based services

There are different ways to locatea subscriber. The most commonwill use BTS measurements.

BTS

BTS

BTS

GMLCRNC

HLR3G-SGSN

3G-MSC

LocationManagementTool

Location

Server

Network Management/Planning System

ApplicationsBSC

SMLC

Location based information

can be used for differentapplications.

Location can be used in smart devices(for example in a car).


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Mobile service applications

Person-to-Person Communications

Mobile Internet

Business Solutions

Mobile Commerce

Location Based Services


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Mobile multimedia messaging

Chat (one to many)

Calendar and email (including synchronisation)

Rich call and video telephony

Picture messaging and multimedia messaging

SMS

PictureMessaging

MultimediaMessageService

MobileMultimedia

Text Text &Graphics

Digitalimageinput

Newcontenttypes

Time

Versatility of Contentand User Benefits


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Multimedia Messaging Service (1/2)

timeline

SMS

textonly

SmartMessaging

& EMS

Text,simple graphics,ringing tones

MultimediaMessagingService

music

video

stills

etc.


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Multimedia Messaging Service (2/2)

SMS-messa

ge

Standardisedenvelope:

encapsulatedmessages

Content:Minimum set ofsupported mediatypesrecommended: text audio images video

variable size

addressesMSISDN or URL


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Interfaces

MMSCenter

HLR

Subscriberdatabase

Externalapplication

MM1

MM5

MM6MM7

MM8I-MMSCMM4

Billingsystem

MM3

Legacysystems

The interfaces in the MMS reference architecture are:

MM1: The reference point between the MMS User Agent and the MMS Relay/Server.

MM2: The reference point between the MMS Relay and the MMS Server.

MM3: The reference point between the MMS Relay/Server and external (legacy) messagingsystems.

MM4: The reference point between the MMS Relay/Server and another MMS Relay/Serverthat is within another MMSE.

MM5: The reference point between the MMS Relay/Server and the Home Location Register(HLR).

MM6: The reference point between the MMS Relay/Server and the MMS User Databases.

MM7: The reference point between the MMS Relay/Server and MMS VAS Applications.

MM8: The reference point between the MMS Relay/Server and a billing system.


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MMSAppl Svcs

MM

Comm

MM

Comm

WSP

WTP

WTLS

WDP/UDP

Bearer

HTTP

TCP

IP

MMSUser

Interface

WSP

WTP

WTLS

WDP/UDP

Bearer

HTTP

TCP

IP

WAP Gateway MMS Relay and ServerMMS User Agent

Lower Layer

MM1Transfer Protocol

MMSUser Agent

WSP HTTP

MMSAppl Svcs

Transfer Protocol payload

Messaging Application Framework

WirelessApplicationProtocol

WAP and MMS


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Network message handling

M-Send.req

M-Send.conf

Message sending

SGSN

GGSN

GPRS BB

MSC/VLR/HLR

SMSCenter

BTSBSC

BTSBSC

WAP GW

PPGMMSCenter

The terminal invokes a WSP/HTTP POST operation with the M-Send.req messageembedded as the content body.

This message is submitted using a URI that addresses the MMS Center thatsupports the specific terminal.

The terminal composes a transaction ID for the submitted message.

The ID is used by the terminal and the MMS Center to provide linkage between theoriginated M-Send.req and the response M-Send.conf messages.

The value used for the transaction ID is determined by the MS and no interpretationis expected by the MMS Center.

The SGSN looks for the right Access Point Name => which service (e.g. MMSC) => whichis the right GGSN -> establishes the connection to the GGSN (tunnelling).

The GGSN ensures that the TCP/IP connection is working.

The MMS Center assigns a message ID to the message when successfully received for

delivery. This ID is used in the following activities that need to refer to the specific sentmessage, e.g. sending the possible delivery report later.

Upon receipt of the M-Send.req message, the MMS Center responds to the WSP/HTTPPOST with a response that includes the M-Send.conf message in its body (body=HTTP levelpayload).

The response message provides a status code for the requested operation. If theMMS Center is willing to accept the request to send the message, the status isaccepted and the message includes the message-ID that the MMS Center hascomposed.


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M-Notification.ind

M-NotifyResp.req

Sending notificationDeferring message

SGSN

GGSN

GPRS BB

MSC/VLR/HLR

SMSCenter

BTSBSC

BTSBSC

WAP GW

PPGMMSCenter

The headers of the PDU (the ones that the originating MMS Center has added to the orig. PDU)are used to generate a notification to the recipient, and are delivered with the message bodyparts to the recipient at retrieval.

A transaction identifier is created by the MMS Center and it is unique up to the following M-NotifyResp only. If the MMS client requests deferred delivery with M-NotifyResp, the MMS server

may create a new transaction identifier.The notification uses SMS as bearer.

SMS-GMSC asks routing info from HLR (the location of the MSC/SGSN that therecipient MS was last connected with; HLR returns the location(s) of the MS.There can be max. two location addresses: value 1 and value 2.Operator can define whether the GSM or GPRS address is the default routinginformation.If the attempt to use the first address fails, GMSC uses the next value.Possible values are: MSC-SGSN, SGSN-MSC, MSC or SGSN.

SendRoutingInfoForShortMsg

SMS-GMSC forwards the message to MSC/SGSN.

ForwardShortMessage

MSC checks VLR to make sure that the MS has not been barred or otherwise restrictedfrom using the network. SGSN checks its own database that the MS has not beenbarred or otherwise restricted from using the network.

SendInfoForMT-SMS

According to specifications it is always right how to do this, this is the Nokia way. XXX???

The information in M-Notification.ind includes the URI that will be used to actually retrieve themessage in a subsequent operation by the receiving MS. Additional information about themessage (e.g. message size, expiry) may be used by the MS to determine its behaviour.

SGSN has its own SS7 MAP or IP interface toward the GMSC.

The headers of the PDU (the ones that the sender's MMS Center has added to the originalPDU) are used to generate a notification to the recipient, and are delivered with the messagebody parts to the recipient at retrieval.

A transaction identifier is created by the MMS Center before sending the notification and it isunique up to the following M-NotifyResp only. If the MMS Client requests deferred deliverywith M-NotifyResp, the MMS Center may create a new transaction identifier.

The notification uses SMS as bearer; the MMS Center sends the M-Notification.ind to theSMS Center.

The SMS Center further forwards the message to SMS-GMSC. The SMS-GMSC asksrouting info from HLR, i.e. the location of the MSC that the recipient MS was last connectedwith (SendRoutingInfoForShortMs).

SMS-GMSC forwards the message to MSC (ForwardShortMessage).

MSC checks VLR to make sure that the MS has not been barred or otherwise restricted fromusing the network (SendInfoForMT-SMS).

MSC forwards the message through the BSS to the receiving MS.

The information in M-Notification.ind includes the URI that will be used to actually retrieve

the message in a subsequent operation by the receiving terminal. Additional informationabout the message (e.g. message size, expiry) may be used by the terminal to determine itsbehaviour. For example, the terminal may delay the retrieval of the message if it exceeds adefined size. The receiver of the M-Notification.ind tells the action to be taken to the MMSCenter with the M-NotifyResp.req, which is routed to the MMS Center the same way as theM-Notification.ind.


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WSP GET.req

M-Retrieve.conf

Fetching message

M-Acknowledge.req

SGSN

GGSN

GPRS BB

MSC/VLR/HLR

SMSCenter

BTSBSC

BTSBSC

WAP GW

PPGMMSCenter

The URI (MMS Center address) required for the retrieval, sent in the preceding M-Notification.ind message, is used in the GET request.

The data returned (M-Retrieve.conf) includes the multimedia message. The headercomponent can provide additional information (such as tariff class, which is useful in ATmessages. - Actually, that's about all additional info that can be there.)


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M-Delivery.ind

Delivery reportRead-Reply

M-read-rec.indM-read-orig.ind

SGSN

GGSN

GPRS BB

MSC/VLR/HLR

SMSCenter

BTSBSC

BTSBSC

WAP GW

PPGMMSCenter

The MMS Center may decide to request an acknowledgement from the MS to confirm thedelivery status of the retrieval.

It may make this decision based on whether it needs to provide a delivery noticeback to the originating MS or not. Alternatively, it may make that decision basedupon an expectation that it would then be able to delete the message from its ownstore.

Always used with Nokia MMS Center

The M-Delivery.ind message is sent by the MMS Center to the originating MS using WAPPUSH to inform when message delivery has occurred.

The message is identified by the Message ID that is generated when the originalmessage is posted. It also provides addressing information of the originally targetedentity.

If an MM had been addressed to multiple entities, multiple M-Delivery.indmessages are expected to be returned, one for each addressed entity.

M-read-rec.ind message is send by receivers MS to the MMS Center to informwhen message has been opened by the receiver.

M-read-orig.ind message is send by the MMS Center to the originating MS usingWAP PUSH to inform when message has been opened by the receiver


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M-Send.req

M-Send.conf

SMTP Mail

messageSMTP-levelacknowledgement

E-mail

server

GPRS BB

GGSNSGSN

IP network

WAP GW

BTSBSC

MMSCenter

Externalapplication

E-mail connectivity


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Nokia MMS Architecture

Cellular Network

WAP GW

PPG

MMSC

WAPGWIFStore & Forward

EAIF

Legacy support

Multimedia storage

Email smart push

Multimedia voicemessaging

Profileserver

MAPinterfacefor MNP

The goals in designing the network architecture have been:

- independence from actual transport - use WAP transport protocols

- independence from the network mechanisms (e.g. notifications) - use WAP push

Multiple network support for high speed networks: GSM, GPRS, WCDMA, TDMA, CDMA, ...

MMS Center functionalities:

WAP support

Communication between MS and WAP Gateway is based on WAP (WSP).

Use of different WAP mechanisms: WAP Post (MS sending message), WAP Push(notifications, delivery reports), WAP GET (MS getting messages from MMS Center).

Because MMS Center does not have WAP gateway functionality external WAP Gateway isneeded.

WAP GW interface is handling communication in a MMSC towards WAP GW. Used protocolis HTTP.

Store and Forward engine

When the MMS Center receives the messages, it stores it to its DB.

Sends the message to the receiving MS, when the MS so requests.

If the message cannot be delivered successfully, it is stored for later delivery.

After successful delivery/VP expiration, the message is deleted from MMS Center DB.

Application Interface

Application interface provides means to integrate MMS Center with Internet applications,such as e-mail, instant messaging services, and other. It is also used by Nokia/operator/thirdparty to develop services that use MMS.


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MMS Center basic features Basic messaging (MO, MT, AO, AT)

Addressing based on MSISDN or e-mail address

Database storing Multiple recipient support

Inter-MMS Center support

Message barring support

Desired delivery time

Address hiding

Number portability support

Notifications and acknowledgements

Message Confirmation

Message Notification

Delivery Report

External Application Interface


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MMS Center optional features

Alarm interface to NMS

Centralised management Content adaptation

In advance credit check (IACC)

Internet mail gateway

Mobile number portability with MAP interface

Performance management

Secured IP interfaces

Subscriber database interface

Application gateway (AGW) services

Email smart push

Legacy phone support

Multimedia storage

Multimedia voice messaging


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Mobile Internet services - A hypermarket

INFOR-

MATION

NEWS

General Headlines Financial &

Business Politics Tabloids Culture &

Entertainment Sports Lottery

BANKING & FINAN-CIAL SERVICES

Stock indexes Stock prices Metal prices

Stock alert Currency rates Interest rates Account balance Credit/debit balance Cheque balance Money transfers Bill payments Automatic call Account status

flash Stock purchase Financial products

purchase

LOCAL SERVICES(CITY GUIDE)

Taxi Restaurants Cinema Theatres Concerts Exhibitions Night Clubs Emergency services Pharmacies Household

assistance Weather Time Directory services ATM Locator

BUY & SELL

Classifieds- Cars- Properties

-Jobs

Auctions Shopping

- Small dailyitems

- Specificpromotions

Tickets

TRAVEL

Traffic (traffic jams,radar, control,)

Public

transportation Navigation services Train schedules Flight schedules Hotels Holiday packages

SpecialInterest

Mobile t elephones Internet sites and

services Computers and

hardware Automobile

MUSIC

Ringtones Short clips

(e.g. MP3)

TV

Program-me schedules

Highlights

LIFESTYLE

Gastronomy Hobbies Fashion Parties

FUN

Jokes Sayings Dream

analysis

CHATS

Topicspecific

Private

PICTURES

Icons Logos Photos Postcards

GAMES

Puzzles Quizzes Tamagotchi Games Gambling/Betting

ASTROLO-GY

Horoscopes Astrolove Biorhythm Specific

Horoscopes

DATING

Chats Dating

services

ENTER-

TAINTMENT

Student Self-Task:I-mode is a mobile Internet protocol introduced in Japan by NTTDoCoMo. What is I-mode?


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Nokia Mobile Internet Solution

Mobile network

Internet/Intranet

Content

Person to personmessaging

MMSC SMSC

SMSC =Short Message Service CenterMMSC =Multimedia Message Service Center

NMP = Nokia Messaging Platform

Personalization

MAXPlatform

Profile

Directory

Location based service

Location Server

Information RetrievalNMP


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What does mCommerce really mean?

Multi Media Kiosk

Vending Machine

Loyalty cards

Local payments

Transportation

OnlineLocal

Auction

Music downloading

Online banking

Ticketing

Online payments

Application downloading


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Packet switched bearer services

Voice over IP

Voice and video over IP

Data

Voice messaging and dictation

SMS via packet

Point-to-multi-point, multicast via SGSN


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H.324 video call Codecs for real-time voice,

data and video.

These can be combined,e.g. video telephony.

Functionality of H.324 can beincluded in a PC or a stand-alone device/terminal.

Logical channel signalling describes the content of each logicalchannel when the channel is opened.

Transmission is matched with receiver decoding capability.

Interworking with ATM networks and LANs should be possible.

May also be used in multipoint configurations through a MCU(Multipoint Control Unit).


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Mobile Applications

Review Questions


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Review (1/5)

1. Which of the following are UMTS services?

a) data services

b) Web browsing

c) SMS

d) speech call

e) VoIP call

f) voice mail service


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2. Identify operator specific services (OSS):

a) cell broadcast service

b) packet switched service

c) SIM application toolkit (SAT)

d) CAMEL

Review (2/5)


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3. (U)SAT specifies open application programming interfaces between

a) SIM and MEb) SIM and a remote application serverc) SIM and SCPd) ME and RNC

4. WAP/WTA was developed toa) support exclusively MExEb) to design and program application locally on the MEc) to allow interaction between the SCP and the MEd) to support radio interface protocols

5. The abbreviation OSA stands for Open Systems Architecture.

True False

Review (3/5)


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6. Which of the following sentences best describes a bearer?

a) A traffic channel only for speech

b) A signalling connection between the core network and theradio access

c) A variable channel that can carry different types of data

d) A fixed-bit-rate data channel

Review (4/5)


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7. VHE is the abbreviation for Virtual Home Environment. Which of thefollowing is, or/will be, a characteristic of the VHE (more than one)?

a) Allows the subscribers to use their services whilst roaming.b) The subscribers can customise their own environment.c) It is the same as a SMSC (Short Message Service Centre).d) VHE is possible because of CAMEL.e) VHE is located within the HLR.f) It is only possible in UMTS.

8. Location Services

a) can be offered only in combination with a subscription tobasic telecommunication services

b) are a prerequisite for roamingc) used for determining the position of the mobile terminald) and Location Based Services have the same meaning

Review (5/5)


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Further information from the Specifications

Toolkits:

CAMELMExE

SIM ATKOSALCS

"Internet tools"SoLSA

etc...

Circuitteleservices

(22.003)

TelephonyFAX

SMS

Valueadded

non-callrelatedservices

(e.g. eMail,MMS,

WWW, News,etc)

IPmultimedia

services

OtherBearer

servicesSMS,UUS,

USSDGPRS(22.060)

CircuitBearer

services(22.002)

Supplementary

services(22.004)

06_umts services and applications_emad

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