GPRS a Mobile Internet Architecture-CTDC

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GPRS – a Mobile Internet Architecture: 

GPRS – a Mobile Internet Architecture Stas Khiman CTO,Narus Inc. Stask@narus.com CoolTech Club Founding Meeting July 9, 2003

Goals & Agenda : 

Goals & Agenda Acronyms flood - 2G, 3G, GSM, GPRS Challenges of the Mobile IP GPRS basic architecture GPRS components GGSN SGSN GTP – GPRS Tunneling Protocol Charging for GPRS services Q&A

Evolution 2G , 2.5G and 3G : 

Evolution 2G , 2 .5 G and 3G

GSM/GPRS acronyms : 

GSM/GPRS acronyms GSM - Global System for Mobile communication GPRS – General Packet Radio Service IMSI - International Mobile Subscriber Identity SIM – Subscriber Identity Module IMEI – International Mobile station Equipment Identity IP – Internet protocol ( often – address)

GSM System Architecture: 

GSM System Architecture

Mobile IP challenge: 

Mobile IP challenge

GPRS System Architecture: 

GPRS System Architecture PDN - Public Data Network

GPRS Acronyms: 

GPRS Acronyms SGSN – Serving GPRS Supporting Node GGSN – Gateway GPRS Supporting Node CGF – Charging Gateway Functionality HLR – Home Location Register PDN – Packet Data Network PLMN – Public Land Mobile Network

GPRS Logical Architecture: 

GPRS Logical Architecture (GSM 09.60 version 7.4.0 Release 1998)

GPRS Routing Example Two IPs assigned: 

GPRS Routing Example Two IPs assigned

PDP Context: 

PDP Context PDP: Packet Data Protocol (PDP) is a network protocol used by an external packet data network interfacing to GPRS. PDP Context: Information sets held in MS and GSNs for a PDP address NSAPI: Network Service Access Point Identifier. An integer value in the range [0; 15], identifying a certain PDP Context.

PDP Context Activation Procedure: 

PDP Context Activation Procedure + IP assignment + Roaming

GPRS Transmission Plane: 

GPRS Transmission Plane

GTP: GPRS Tunnelling Protocol: 

GTP : GPRS Tunnelling Protocol (GSM 09.60 version 7.4.0 Release 1998) TID – Tunnel Identifier (IMSI + NSAPI) NSAPI: Network Service Access Point Identifier. An integer value in the range [0; 15], identifying a certain PDP Context. It identifies a PDP context belonging to a specific MM Context ID.

Protocols at Gi interface: 

Protocols at Gi interface

GPRS/Internet connection: 

GPRS/Internet connection

GPRS Charging: 

GPRS Charging “IRS Definition”: If you can’t charge for you services, it is a hobby, not a business!

GPRS Charging: 

GPRS Charging 3GPP TS 32.015 V3.8.0 (2001-12) CGF: Charging Gateway Functionality SCF: Service Control Function

Where to find specifications?: 

Where to find specifications? ETSI - European Telecommunications Standards Institute www.etsi.org - official specifications 3GPP - 3 rd Generation Partnership Project www.3gpp.org - free specifications (work in progress) http://www.comsoc.org/livepubs/surveys/public/3q99issue/bettstetter.html - very good IEEE article , excellent starting point

PowerPoint Presentation: 

Q & A