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
SUBNETWORK131.44.15.XXX
SUBNETWORK191.200.44.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
24-36Kbps Send - 16-24Kbps Receive
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
8-12Kbps Send - 32-48Kbps Receive8-12Kbps Send - 32-48Kbps Receive
One Up, Four DownOne Up, Four Down
Class 12 - Configurable betweenClass 10 - Configurable between
24-36Kbps Send - 16-24Kbps Receive
Or Three Up, Two Down
8-12Kbps Send - 32-40Kbps Receive16-24Kbps Send - 24-36Kbps Receive
One Up, Four DownTwo Up, Three Down
Class 8Class 6 - Configurable between
8-12Kbps Send - 24-36Kbps Receive8-12Kbps Send - 16-24Kbps Receive
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