Gsm Updated v5

CSL

GSMGSM... a Global Mobile Communication System

GSM S t A hit t� GSM System Architecture� Mobile Billing System� Operational Support Platform� Operational Support Platform

GSM System Architecture CSLGSM System Architecture

� Network Elements� An example: Call setup� Running a GSM network� g� Present and Future...

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Network Elements an overviewNetwork Elements – an overview

AUC CSL

� MS Mobile Station = phone + SIM card

BSCHLR

EIRVMS

MSCVLR

SMSC

Telenor Nett

PrePaidNode

INTERNETTelenor Nett

IN

PSTNFixed network BSCPABXPSTN

InternationalMSC

Mobile Station (MS) CSL( )� MS consists of the mobile equipment (the terminal) and a smart

card called the Subscriber Identity Module (SIM).card called the Subscriber Identity Module (SIM).� The SIM provides personal mobility, so that the user can have

access to subscribed services irrespective of a specific terminal. By inserting the SIM card into a GSM terminal, the user is able to

i d k ll t th t t i l d i threceive and make calls at that terminal, and receive othersubscribed services. Without the SIM, the terminal will not work.

� The mobile equipment is uniquely identified by the International Mobile Equipment Identity (IMEI)Mobile Equipment Identity (IMEI).

� The SIM card contains the International Mobile Subscriber Identity (IMSI) used to identify the subscriber to the system, a secret key for authentication, and other information. ,

� The IMEI and the IMSI are independent, thereby allowing personal mobility.

� The SIM card may be protected against unauthorized use by a d l id tit b (PIN)password or personal identity number (PIN).

AUC CSL


� BTS Base Transceiver Station

BSCHLR


EIRVMS

MSCVLR

SMSC

Telenor Nett

PrePaidNode


IN


InternationalMSC

Base Transceiver Station (BTS) CSL

� The BTS corresponds to the transceivers and antennas used in h ll f th t keach cell of the network.

� It handles the radio-link protocols with the Mobile Station. � A BTS may be placed in the center of a cell (omni-directional)� A BTS may be placed in the center of a cell (omni directional)

or shooting in one or more specific directions (sectorized). Its transmitting power defines the size of a cell.

� E h BTS h t i ll b t d i t t i� Each BTS has typically between one and sixteen transceiversdepending on the density of users in the cell.

� In a large urban area, there will potentially be a large number g , p y gof BTSs deployed, thus the requirements for a BTS are ruggedness, reliability, portability, and minimum cost.

Cell conceptCSL

Cell concept� Dominant coverage area

of one BTS sector� A sectorized BTS� A sectorized BTS

typically shoots in 3 antenna directions, thus covering 3 sectors or

llcells� Because of limited

bandwidth, frequency channels have to bechannels have to bereused

� Identical and neighboring frequenciesneighboring frequenciesneed to be distributed away from each other in order to avoid noise in t f i t fterms of interference.

AUC CSL



BSCHLR

� BTS Base Transceiver Station� BSC Base Station Controller

EIRVMS

MSCVLR

SMSC

Telenor Nett

PrePaidNode


IN


InternationalMSC

Base Station Controller (BSC) CSL( )

� The BSC controls a group of BTSs and th i dimanages their radio resources.

� The physical area the BSC covers is divided into one or more Location Areas.

� BSC handles radio-channel setup, handover, frequency hopping and the radio frequency power levels of the BTSs.h h b h b l� The BSC is the connection between the mobile

station and the Mobile service Switching Center (MSC).

f i i h d h SC� Before transmitting speech or data to the MSCthe information is transformed and coded in an TRANSCODER.

Handover (HO) CSL( )- Intra BSC Handover- Inter BSC Handover (as illustrated)- Inter MSC Handover

BSC BSCBSC

AUC CSL



BSCHLR

� BTS Base Transceiver Station� BSC Base Station Controller� HLR Home Location RegisterEIRVMS

MSCVLR

SMSC

Telenor Nett

PrePaidNode


IN


InternationalMSC

Home Location Register (HLR) CSLg ( )� The HLR is a network database that contains all the

administrative information of each subscriber registered in theadministrative information of each subscriber registered in theGSM network, along with the current location of the mobile.

� Subscription data states the logical identity of each subscriber (MS) and which services that are accessible or barred for the ( )respective subscriber.

� The location of the mobile is typically in the form of the address of the Visitor Location Register (VLR) associated with the mobile t ti Thi i f ti i d t t ll d SMS t thstation. This information is used to route calls and SMS to the

MSC/VLR where the mobile station is currently located. � The HLR also contains a number of functions for managing these

data controlling services and enabling subscribers to access anddata, controlling services and enabling subscribers to access andreceive their services when roaming within and outside their home GSM network.

AUC CSL



BSCHLR

� BTS Base Transceiver Station� BSC Base Station Controller� HLR Home Location Register� MSC Mobile services Switching

EIRVMS

� MSC Mobile services Switching Centre

� VLR Visitor Location RegisterMSC

VLRSMSC

Telenor Nett

PrePaidNode


IN


InternationalMSC

Mobile Switching Centre (MSC) /Vi it L ti R i t (VLR)

CSLVisitor Location Register (VLR)� The MSC is a very central component of the GSM network. The MSC

performs the switching functions of the network and also providesperforms the switching functions of the network and also providesconnection to other networks.

� It additionally provides all the functionality needed to handle a mobile b ib h i t ti th ti ti l ti d tisubscriber, such as registration, authentication, location updating,

handovers, and call routing to a roaming subscriber.� The VLR is always implemented together with a MSC; so the area

under control of the MSC is also the area under control of the VLR. � The VLR contains selected information from a subscriber's HLR

necessary for call control and provisioning of the subscribed servicesnecessary for call control and provisioning of the subscribed servicesto the visiting user.

� Signaling between functional entities in the Network Subsystem uses Signaling System Number 7 (SS7)Signaling System Number 7 (SS7).

AUC CSL



BSCHLR

� BTS Base Transceiver Station� BSC Base Station Controller� HLR Home Location Register� MSC Mobile services Switching

EIRVMS

� MSC Mobile services Switching Centre

� VLR Visitor Location Register� AUC Authentication Centre

MSC SMSC

Telenor Nett

PrePaidNode


IN


InternationalMSC

Authentication Centre (AUC)CSL

Authentication Centre (AUC)

� Th AUC t th ti ti d i h i d t� The AUC generates authentication and ciphering data.� The purpose of the authentication security feature is to

protect the network against unauthorized use. It also protects subscribers by denying the possibility for intruders to impersonate authorized users.

� The ciphering data is used to ensure that confidentialityThe ciphering data is used to ensure that confidentialityand integrity is kept on the physical radio channels. Ciphering prevents user information and signalling to be available or disclosed to unauthorized individuals.available or disclosed to unauthorized individuals.

AUC CSL

� MS Mobile Station = phone + SIM card� BTS Base Transceiver Station� BSC Base Station Controller� HLR Home Location Register

BSCHLR

� HLR Home Location Register� MSC Mobile services Switching Centre� VLR Visitor Location Register� AUC Authentication Centre� EIR Equipment Identity Register

For blacklisting stolen and unwanted EIRVMS

gequipment

� SMSC Short Message Service ”Support” Centre� VMS Voice Messaging System� PrePaid Node Hosting GP Prepaid services� IN Intelligent Network

MSC SMSC

Telenor Nett

PrePaidNode

� PSTN Public Switched Telephone Network� PABX Private Automatic Branch Exchange


IN


InternationalMSC

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GSM Call SetupGSM Call Setup

GSM C ll S tGSM C ll S tCSL

GSM Call SetupGSM Call Setup

AUC CSL

� MS Mobile Station = phone + SIM card� BTS Base Transceiver Station� BSC Base Station Controller� HLR Home Location Register

BSCHLR

� HLR Home Location Register� MSC Mobile services Switching Centre� VLR Visitor Location Register� AUC Authentication Centre

Stand-alone or integrated in HLR� EIR Equipment Identity Register

EIRVMSq p y g

For blacklisting stolen and unwanted equipment

� SMSC Short Message Service ”Support” Centre� VMS Voice Messaging System� PrePaid Node Hosting prepaid service system

MSC SMSCPrePaidNode

� IN Intelligent Network services� PSTN Public Switched Telephone Network� PABX Private Automatic Branch Exchange

INTERNETIN


InternationalMSC

CSL

BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

PABXPSTNI t ti l

PSTNFi d N t k

MSC BSC

InternationalFixed Network

CSL

BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l

PSTNFi d N t k InternationalFixed Network

CSL

BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


CSL

BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


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BSCBSC

Base Station ControllerBase Station Controller

�� The call request reaches the BSC from the BTS The call request reaches the BSC from the BTS d i f d d t MSCd i f d d t MSCand is forwarded to MSC.and is forwarded to MSC.

�� After call is established, the BSC will perform After call is established, the BSC will perform decodingdecoding of the call (in typical config.)of the call (in typical config.)decod gdecod g o t e ca ( typ ca co g )o t e ca ( typ ca co g )

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BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


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BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


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BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


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�� Checks A number.Checks A number.�� To whom is A subscriber calling?To whom is A subscriber calling?gg

(Checks B number)(Checks B number)�� Example : A subscriberExample : A subscriber has GP has GP

ididprepaid.prepaid.

MSC MSC

Mobile Switching CentreMobile Switching Centre

CSL

BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


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BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


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BSC HLR

EIRVMSVoicemail

MSC SMSCPrePaidPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


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�� Does the A subscriber have Does the A subscriber have money left on his/her account?money left on his/her account?

��When the call is established and When the call is established and onon--going the subscriber’s account going the subscriber’s account is decremented accordinglyis decremented accordinglyis decremented accordingly.is decremented accordingly.

PrePaid NodePrePaid Node

CSL

BSCHLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLR

EIRVMSVoicemail

MSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLR

EIRVMSVoicemail

MSCMSC SMSCPrePaid

Voicemail

INTERNETIN

MSC BSC

PABXPSTNI t ti l


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��Where is the B subscriber?Where is the B subscriber?��MSC interrogates in HLRMSC interrogates in HLR��MSC interrogates in HLR.MSC interrogates in HLR.

(HLR = Home Location Register)(HLR = Home Location Register)

MSCMSCMobile Switching CentreMobile Switching Centre

CSL

BSCHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

�� HLR says ’I am the home of the B HLR says ’I am the home of the B subscriber and I know where he/she is rightsubscriber and I know where he/she is rightsubscriber and I know where he/she is rightsubscriber and I know where he/she is rightnow’ (i.e. which VLR)now’ (i.e. which VLR)

�� Tells this VLR ’Give me a visitor addressTells this VLR ’Give me a visitor address�� Tells this VLR Give me a visitor addressTells this VLR Give me a visitor addressfor this subscriber’ (Roaming Number) for this subscriber’ (Roaming Number)

HLRHLRHLRHLRHome Location Register

CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSCMSC BSC

PABXPSTNI t ti l


CSL

�� Hosting MSC/VLR returns TEMPORARILYHosting MSC/VLR returns TEMPORARILYost g SC/ etu s Oost g SC/ etu s Oassigned visitor/roaming address for Bassigned visitor/roaming address for B--subscriber to HLR.subscriber to HLR.

MSCMSC


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

�� ’Thanks for the visitor address!’’Thanks for the visitor address!’�� ’I will send this address to the MSC ’I will send this address to the MSC

that requested for it.’ that requested for it.’

HLRHLRHome Location Register

CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

�� ’Thank you, HLR!’’Thank you, HLR!’�� Speech connection path will set upSpeech connection path will set up�� Speech connection path will set upSpeech connection path will set up

now towards the MSC/VLR where the now towards the MSC/VLR where the B subscriber is presently located.B subscriber is presently located.

MSCMSC


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

�� Sets up a speech connection towards Sets up a speech connection towards BSC.BSC.

�� Delivers BDelivers B--subscriber ID to BSC and asks subscriber ID to BSC and asks to page for the subscriber using that IDto page for the subscriber using that IDto page for the subscriber using that ID.to page for the subscriber using that ID.

MSCMSC


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL�� BSC now sends a PAGING MESSAGE to all the BTSs BSC now sends a PAGING MESSAGE to all the BTSs

that it covers/controls.that it covers/controls.�� Carrys PAGING RESPONSE from called MS back to Carrys PAGING RESPONSE from called MS back to yy

MSC.MSC.�� Allocates a RADIO channel through a BTS with best Allocates a RADIO channel through a BTS with best

available and allowable SIGNAL STRENGTH for called available and allowable SIGNAL STRENGTH for called MS.MS.

�� Performs SPEECH CODING when call is established.Performs SPEECH CODING when call is established.

BSCBSC

Base Station ControllerBase Station Controller

CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


�� The BThe B--subscriber now has all these choices:subscriber now has all these choices:CSL

ee subsc be o as a ese c o cessubsc be o as a ese c o ces�� He/she may answer the call and AHe/she may answer the call and A--subscriber hears him/her.subscriber hears him/her.�� He/she may reject the call.He/she may reject the call.�� He/she may be busy with another call and still can HOLD or He/she may be busy with another call and still can HOLD or

h ll if h / h h MULTI ll i i h hi /hh ll if h / h h MULTI ll i i h hi /hanswer the new call if he/she has MULTI call option with his/heranswer the new call if he/she has MULTI call option with his/hersubscription and mobile (MS).subscription and mobile (MS).

�� Caller (ACaller (A--subscriber) may hear an anouncement if called MS is subscriber) may hear an anouncement if called MS is turned off or outside coverage area at that momentturned off or outside coverage area at that momentturned off or outside coverage area at that moment.turned off or outside coverage area at that moment.

�� Call may get forwarded to another number or to his/her VOICE Call may get forwarded to another number or to his/her VOICE MAIL box if called MS is forwarded on NOT AVAILABLE MAIL box if called MS is forwarded on NOT AVAILABLE condition.condition.

�� Call may also get forwarded further to another call or to his/her Call may also get forwarded further to another call or to his/her VOICE MAIL BOX if the mobile (MS) doesn’t ANSWER the call VOICE MAIL BOX if the mobile (MS) doesn’t ANSWER the call and has an active forwarding on NO REPLY or BUSY condition.and has an active forwarding on NO REPLY or BUSY condition.

A dA dAnd even more...And even more...

Thus, what happens next depends on the B subscriber’s condition Thus, what happens next depends on the B subscriber’s condition and what he/she chooses to doand what he/she chooses to doand what he/she chooses to do.and what he/she chooses to do.

CSL

CSL

CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


CSL

BSCHLRHLR

VMSVoicemail

EIR

MSCMSCPrePaid

Voicemail

SMSC

IN INTERNET

MSC BSC

PABXPSTNI t ti l


Speech calls in the GSM system CSLp y

MSC: Mobile Switching CentreBSC B S i C ll

MSCBSC Location Area

BSC: Base Station ControllerHLR: Home Location RegisterVLR: Visitor Location RegisterTC: Transcoder f1

f8

PSTN MSC BSCf4

f8f3f6

TC

Capacity:16 kb/s pruser

PSTNFixed Network

MSC BSC

f 2, TS 8f2f9

f713 kb/sspeech

TCspeech64 kb/s

pr speechchannel

64 kb/s

HLR VLRX

BSCHome Register Visitor Register

S

g g

Data calls in the GSM system CSLyMSC: Mobile Switching CentreBSC: Base Station Controller

MSCBSC Location Area

f1f8

HLR: Home Location RegisterVLR: Visitor Location RegisterTC: TranscoderIWU: Interworking Unit

PSTN MSC BSCf4

f8f3f6

TC

Capacity:16 kb/s pr

user

IWU

Modem pool

g

PSTNFixed Network

MSC BSC

f 2, TL 8f2f9

f79.6 kb/sdata

TCdata64 kb/s

pr datachannel

64 kb/sIWU

call marked ith d t ”fl ”

HLRX

BSCHome Register Visitor Register

VLRD

with data ”flag”

g g

CSL

Running a GSM networktechnically speaking...

Running a GSM network

T h i l di i li ithiCSL

Technical disciplines withina GSM operator company

� Radio planningp g�Site allocation, frequency use and reuse.

� Switch planning�Capacity of processor and links, new nodes.

� Implementation�Civil works, site acquisition, roll-out.

CSL

�Operation of existing network�Fault Monitoring and Fault Handling, Quality Supervision.�Expertise on core network, including signaling system No. 7,

value added services and IN(NSS = Network Switching System).

�Expertise on access network, i.e. radio and BSC (BSS = Base Station System).

�Expertise on transmission (Tx) and power (PWR)�Expertise on transmission (Tx) and power (PWR).�Provisioning of new elements into the network.�Provisioning of computer network infrastructure for O&M

(DNA).�Local presence for rapid physical fault handling.

�R h d D l t�Research and Development

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GSM t h l t tGSM technology at present...

GSM technology at present... CSLgy p�High Speed Circuit Switched Data (HSCSD)

�Available in some markets Requires a special GSM terminal�Available in some markets. Requires a special GSM terminal.�Allows you to utilize more than one timeslot on the air

interface, thus increasing the transmission capacity.�Dynamic resource allocation As a result data rate will vary�Dynamic resource allocation. As a result data rate will vary,

but still be considerably higher than 9.6 kbps. �MMS

�M bil M lti di S i�Mobile Multimedia Service�Send and receive sound, text and picture in one message

(even in color given the right terminal).�Other value added services

� ‘My webpage’, administrate your own subscription, bill, email, short messages, address list and more on the internet.g ,

�Hundreds more...

GPRS (General Packet RadioCSL

GPRS (General Packet RadioServices)� I i i l GPRS b d t h t� In principle, GPRS can be compared to short

messages (SMS), but it can handle much bigger chunks of data.

�GPRS provides a ’natural’ way of transmitting most�GPRS provides a natural way of transmitting mosttypes of data:�You only use the network resources when you

need them, i.e. when you are sending orneed them, i.e. when you are sending orreceiving a defined amount of data.

�The rest of the time network resources are available for other users.

�Instead of using a small portion of the network’s resources for a long period of time, the user can utilize a bigger portion of the resources over a h t tishorter time span.

Packet switching: Efficient use of radio

CSL- Efficient use of radioresources

Circuitswitiched Time

GPRSGPRSTime

Time

GPRSTi

Circuitswitched

Time

GSM has been through BIG CSLchanges in size, capacity and functionality

CSL

d f t...and future

What’s in store for us? CSLWhat s in store for us?�EDGE

Enhanced Data rates for GSM Evolution• Enhanced Data rates for GSM Evolution• Supplement to GPRS• Improvement lies mainly in the• Improvement lies mainly in the

modulation on the air interface

�UMTS�UMTS• Universal Mobile Telephony System• GPRS will live in partnership with UMTSG S pa p U S• New radio technology (WCDMA)• New frequency band• New service concept

CSL

GSM evolutionFunctionality& it IMT 2000& capacity IMT 2000

capable systems

UMTS/WCDMA

GPRS115 kb

EDGE384 kbps

2 Mbps

HSCSD/14.457.6 kbps

Circuit switched

115 kbpsPacket switched

Ti

Speech

Circ. sw. data<9.6 kbps

Time

UMTS exterior CSLUMTS exterior

UMTS interior CSLUMTS interior

CreditsCSL

Credits� Primary version of this presentation was prepared by Vidar

Skartveit Telenor Mobil NorwaySkartveit, Telenor Mobil, Norway.� Call setup material adapted from original by

Jan Rune Wågø, Telenor Mobil, Norway.Oth t i l d t d d d b t f� Other material adapted and used by courtesy ofEgil Rambøl, Telenor Mobile/GrameenPhone.

� Images and sketches from Nokia, Ericsson and others.g� Definitions borrowed from the works:

� ‘An overview of the GSM system’ by Javier Gozálvez Sempere � ‘Overview of the Global System for Mobile Communications’ by John� Overview of the Global System for Mobile Communications by John

Scourias� ‘GSM – Det globale systemet for mobilkommunikasjon’ (in Norwegian)

by Vidar Bjugan.y j g

CSL

Thank you!Thank you!� Questions?

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Gsm Updated v5