GPRS a Mobile Internet Architecture-CTDC

7/28/2019 GPRS a Mobile Internet Architecture-CTDC

1/20

GPRS a Mobile Internet

Architecture

Stas Khiman

CTO,Narus Inc.

[email protected]

CoolTech Club Founding Meeting

July 9, 2003


2/20

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


3/20

Evolution2G , 2.5G and 3G


4/20

GSM/GPRS acronyms

GSM - Global System for Mobile

communication

GPRS General Packet Radio Service

IMSI - International Mobile SubscriberIdentity

SIM Subscriber Identity Module

IMEI

International Mobile stationEquipment Identity

IP Internet protocol ( often address)


5/20

GSM System Architecture


6/20

Mobile IP challenge

Router

1.2.3.*

10.20.30.*

1.2.3.4

10.20.30.40


7/20

GPRS System Architecture

PDN - Public Data Network


8/20

GPRS Acronyms

SGSN Serving GPRS Supporting Node

GGSN Gateway GPRS SupportingNode

CGF Charging Gateway Functionality HLR Home Location Register

PDN Packet Data Network

PLMN Public Land Mobile Network


9/20

GPRSLogical Architecture

(GSM 09.60 version 7.4.0 Release 1998)


10/20

GPRS Routing ExampleTwo IPs assigned


11/20

PDP Context

PDP: Packet Data Protocol (PDP) is anetwork protocol used by an externalpacket data network interfacing to GPRS.

PDP Context: Information sets held inMS and GSNs for a PDP address

NSAPI: Network Service Access PointIdentifier. An integer value in the range

[0; 15], identifying a certain PDP Context.


12/20

PDP Context Activation Procedure

+ IP assignment

+ Roaming


13/20

GPRS Transmission Plane


14/20

GTP: GPRS Tunnelling Protocol(GSM 09.60 version 7.4.0 Release 1998)

TIDTunnel 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.


15/20

Protocols at Gi interface


16/20

GPRS/Internet connection


17/20

GPRS Charging

IRS Definition:

If you cant charge for you services,it is a hobby, not a business!


18/20

GPRS Charging

3GPP TS 32.015 V3.8.0 (2001-12)

CGF: ChargingGateway Functionality

SCF: Service Control

Function


19/20

Where to find specifications?

ETSI - European TelecommunicationsStandards Institute www.etsi.org - official specifications

3GPP - 3rd Generation Partnership Project www.3gpp.org - free specifications (work in progress)

http://www.comsoc.org/livepubs/surveys/pu

blic/3q99issue/bettstetter.html - very goodIEEE article , excellent starting point
http://www.etsi.org/http://www.3gpp.org/http://www.comsoc.org/livepubs/surveys/public/3q99issue/bettstetter.htmlhttp://www.comsoc.org/livepubs/surveys/public/3q99issue/bettstetter.htmlhttp://www.comsoc.org/livepubs/surveys/public/3q99issue/bettstetter.htmlhttp://www.comsoc.org/livepubs/surveys/public/3q99issue/bettstetter.htmlhttp://www.3gpp.org/http://www.etsi.org/


20/20

Q & A

GPRS a Mobile Internet Architecture-CTDC

Documents

Transcript of GPRS a Mobile Internet Architecture-CTDC