1. source gprs overview juni 2010

8/12/2019 1. Source GPRS Overview Juni 2010

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GPRS OVERVIEWGPRS OVERVIEW

By Subur Hendro Subekti By Subur Hendro Subekti 1414 Juni Juni 2010 2010


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Wireless Generation (1)Wireless Generation (1)

2G GPRS 8 TS 171,2 Kbps (DL 50 Kbps) 3G HSDPA DL 14 Mbps

AL 5,8 MbpsEDGE 384 Kbps (473,6 Kbps)DL 236 Kbps


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Wireless Generation (2)Wireless Generation (2)

Phase 2+HSCSD

Phase 2+GPRS

Phase 2+Edge

SpeechData HSCSD 4x (8x) 14,4kb/s

SpeechData up to 171kb/s

Circuit switched 64kb/sData up to 1.92 Mb/s

CS Network

PS Network

SpeechData up to 553 kb/s

UMTS


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Cellular Packet Data EvolutionCellular Packet Data Evolution

TDMA

GSM

PDC

cdmaOneIS-95A

GPRS

cdmaOneIS-95A CDMA2000 1X

EDGE

WCDMA

CDMA2000 1XEV

2G< 64 Kb/s

Evolved 3G384 Kb/s 8Mb/p

2.5G64 144 Kb/s

3G phase 1384 Kb/s 2Mb/s

2000/2001 2001/2002 2003+


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HSCSDHSCSD vsvs GPRS (1)GPRS (1)

Unavailable

D

a t a w

i t h H S C S D

TCH1

TCH2

TCH3

TCH4

TCH5

TCH6

TCH7

TCH8


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HSCSD vs GPRS (2)

D a t awi t h

GP R

S

TCH1

TCH2

TCH3

TCH4

TCH5

TCH6

TCH7

TCH8

TCH1

TCH2

TCH3

TCH4

TCH5

TCH6

TCH7

TCH8

Unavailable

D a

t a w

i t h H S C S D

TCH1

TCH2

TCH3

TCH4

TCH5

TCH6

TCH7

TCH8

TCH1

TCH2

TCH3

TCH4

TCH5

TCH6

TCH7

TCH8

TCH5


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What is GPRSWhat is GPRS

GPRS brings packet switching in GSM >> Always connected, always on! New air channel coding scheme >> Higher data rate from 9.05kb/s to

171.2kb/s! A new sub network in GSM connecting to data networks (Internet) >> Utilize

existing BSS coverage! The end user sees GPRS as a wireless Internet sub network >> Flexible

Charging, based on data volume, access point, etc!

Localareanetwork

Router

Localareanetwork

Router

PacketnetworkDatanetwork(Internet)

GPRSSUBNETWORK

SUBNETWORK155.222.33.XXX



HOST191.200.44.21

HOST131.44.15.3

HOST155.222.33.55

"Router"


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GPRS MS MODE OPERATIONGPRS MS MODE OPERATION

Class AClass A simultaneous GPRS and Conventional GSM operation Can operate both services (Circuit-switched and GPRS data transfer)simultaneously

Class BClass B can be attached to both GPRS and Conventional GSM services can listen to circuit-switched and GPRS paging supports either circuit-switched calls or GPRS data transfer but not

simultaneously (only one set of services at a time)

ClassCClassC MS is exclusively only attach to GPRS or Conventional GSM operation, nosimultaneous operation


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GPRS Class TypeGPRS Class Type

2 Mbps2 MbpsBroadband

512 kbps256 kbpsADSL

64 kbps64 kbpsISDN Standard

56 kbps56 kbpsDial-UP

28 kbps28 kbpsHSCSD

9.6-14 kbps9.6-14 kbpsGSM CSD

28-64 kbps14 kbpsGPRS

Downlink (Receiving)Uplink (Sending)Type

The class of the device determines the speed at which GPRS can be used.

For example, the majority of GPRS terminals will be able to download data at speeds of up to 24Kbps(kilobytes per second).At the higher end, speeds are theoretically possible up to 171.2 kbit/sec when 8 slots are assigned at thesame time to a single user.In reality 40-50Kbps.

PC cards capable of GPRS will send data up to speeds of 48Kbps.

Compare this to current data speeds available:


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GPRS Multi Slots ClassesGPRS Multi Slots Classes

Multislot classes are product dependant, and determine the maximum achievable datarates in both the uplink and downlink directions.

Written as (for example) 3+1 or 2+2, the first number indicates the amount ofdownlink timeslots (what the mobile phone is able to receive from the network).

The second number indicates the amount of uplink timeslots(how many timeslots the mobile phone is able to transmit).

The active slots determine the total number of slots the GPRS device can usesimultaneously for both uplink and downlink communications.

54412

53411

52410

5239

5148

4337

4236

4225

4134

3223

3122

2111

Active SlotsUplink SlotsDownlinkSlotsMultislotClass


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Example Multi Slots ClassesExample Multi Slots Classes

32-48Kbps Send - 8-12Kbps Receive

Or Four Up, One Down


Or Three Up, Two Down

16-24Kbps Send - 24-36Kbps Receive16-24Kbps Send - 24-36Kbps Receive

Or Two Up, Three DownOr Two Up, Three Down


One Up, Four DownOne Up, Four Down

Class 12 - Configurable betweenClass 10 - Configurable between


Or Three Up, Two Down


One Up, Four DownTwo Up, Three Down

Class 8Class 6 - Configurable between


One Up, Three Down - (3+1)One Up, Two Down - (2+1)Class 4Class 2


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GPRS ArchitectureGPRS Architecture


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GPRS NETWORKSGPRS NETWORKS

RADIO NETWORKRADIO NETWORKPACKET DATA NETWORKPACKET DATA NETWORKGPRS BACKBONE NETWORKGPRS BACKBONE NETWORKOPRATION AND MAINTENANCE NETWORKOPRATION AND MAINTENANCE NETWORKSERVICE NETWORKSERVICE NETWORK

From an IP point of view, the GPRS network can beFrom an IP point of view, the GPRS network can bedivided into the following parts:divided into the following parts:


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GPRS System ArchitectureGPRS System Architecture


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GPRS Network ProtocolGPRS Network Protocol


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GPRS EndGPRS End User ServicesUser Services

The following services for the endThe following services for the end user are supported by the GSN:user are supported by the GSN:

IP connectivityIP connectivityAccess to Internet servicesAccess to Internet services , operator's services, and corporate access, operator's services, and corporate access

Short Message Service (SMS)Short Message Service (SMS)

IP Connectivity BetweenIP Connectivity Between MSsMSs and Internet Hosts in the GPRS Networkand Internet Hosts in the GPRS Network


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GPRS Network NodesGPRS Network Nodes


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GPRS Network NodesGPRS Network Nodes

TETE : The TE (Terminal Equipment) contains the end: The TE (Terminal Equipment) contains the end toto end application,end application,which is using the PS part to transmit and receive the endwhich is using the PS part to transmit and receive the end users packet datausers packet data

MTMT : The MT (Mobile Terminal) establishes data communication betwee: The MT (Mobile Terminal) establishes data communication betwee n a TE and the PDN.n a TE and the PDN.The MT is associated with a subscriber in the cellular networkThe MT is associated with a subscriber in the cellular network and is connected overand is connected over

a radio network to an SGSNa radio network to an SGSN

EIREIR : The Equipment Identity Register (EIR) is a database holding in: The Equipment Identity Register (EIR) is a database holding in formation aboutformation about MSsMSsInternational Mobile Equipment Identity (IMEI)International Mobile Equipment Identity (IMEI)

SCPSCP : The Customized Applications for Mobile network Enhanced Logic: The Customized Applications for Mobile network Enhanced Logic (CAMEL)(CAMEL)

Service Control Point (SCP) contains the CAMEL service logic.Service Control Point (SCP) contains the CAMEL service logic.The SCP stores service and subscriber data and executes the seThe SCP stores service and subscriber data and executes the se rvice logicrvice logicprogram that implements the CAMEL serviceprogram that implements the CAMEL service

CGFCGF : Charging Gateway Function, The CGF receives: Charging Gateway Function, The CGF receives CDRsCDRs from the GGSN in near realfrom the GGSN in near real timetimeand may store theand may store the CDRsCDRs in a persistent storage.in a persistent storage.

BSBS : Billing System, The BS Retrieves Charging Data Records (: Billing System, The BS Retrieves Charging Data Records ( CDRsCDRs) from the GGSN) from the GGSN

OCSOCS : The Online Charging System (OCS) allows real: The Online Charging System (OCS) allows real time credit control and charging of user traffictime credit control and charging of user traffic

PCRFPCRF : The Policy and Charging Rules Function (PCRF) provides the GGS: The Policy and Charging Rules Function (PCRF) provides the GGS N with dynamicN with dynamicauthorization and policy control informationauthorization and policy control information


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THANK YOU

1. source gprs overview juni 2010

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