Ch6 gprs&edge

INTRODUCTION TO GPRS & EDGE

Eng: Waleed El-Safoury

Data transmission: • SMS • FAX• E-mail• Internet• Intranet• Multimedia

Data transmission in GSM

Appearance of High data rates

GSM GPRS

Switching Data:

1.Circuit-Switching

2.Message-Switching

3.Packet-Switching

Circuit Switching• Like Telephone connection• Both source and destination has nothing but data TX.• Connection is done after connecting several points between source and destination • After setup connection speed is constant during TX

Adv. & disadv.

• Best for real time applications• Reverse Charging• Call Redirect• Incoming Calls only• Outgoing Calls Only

- The system offer full channel connection regardless to traffic amount- Both source and destination must have the same protocol- If the destination or connection points are busy source may wait a lot until it is free

Message-Switching• Store-and-Forward Message Switching

• It is not important to both source and destination to be connected at the same time

• It is not necessary to establish a full connection between them

• If an error happened it is not necessary to re-transmit the message as each point it pass has a copy of it

Adv. & disadv.• It offers better BW usage

• It has smaller setup time

• If there is more than one path we can select the free one

- User can not control reception timea

- can’t be used for real time

Packet-Switching• Each message is divided into packets and then transmitted

• Each packet has source and destination information and control data

• Each packet has its own connection and path

• Packets may arrive not in order so it should be re-arranged

Adv. & disadv.

• It is fastest switching method • It is not important to both source and destination to be connected at the same time• Both source and destination may not have the same protocol• As packets are small it is easier to re-transmit • As packets are small it use paths for less time

From Speech to Data Transmission

THE 3RD MOBILE RADIO GENERATION

GSM UMTS (Universal Mobile Telecommunication system).

GSM – GLOBAL SYSTEM FOR MOBILE COMMUNICATION

• GSM900 / E-GSM

• GSM1800 (DCS1800)

• GSM1900 (PCS1900)

• GSM-R

GSM – Implementation in an evolutionary Concept

GSM Phase1:

- digital transmission

- Data transmission was also defined with transmission rates of 0.3 to 9.6 kbit/sec

- includes only a few supplementary services

GSM Phase2:

- Half-rate speech were considered

- All networks and terminal equipment of phase 2 were compatible to the networks and terminal equipment of phase 1

GSM Phase 2+ Solutions for Meeting Current and Future Mobile Requirements

• Enhanced Full Rate Speech

• multi-mode terminal equipment (satellite roaming)

• Internet access

• High Speed Circuit Switched Data HSCSD

• General Packet Radio Service GPRS

• Enhanced Data Rates for the GSM Evolution EDGE

Data Transmission in GSM Phase2+

• 9.6 kbps are possible - GSM

- Using the Air Interface

Point-to-Point Services (PTP)

- Points-to-Multipoint Services (PTM)

• The Point-to-Multipoint Multicast

• The Point-to-Multipoint Group

• Internet Protocol Multicast

- Point-to-Multipoint Multicast • sender sends out

information to several

receivers in a defined

area • No paging• No Confirmations• The sender does not

know who has received

information • Repeated sending • No ciphering is used• One way connection

As Traffic messages

- Point-to-Multipoint Group • All receivers are

selected• They must be GPRS-

attached• Ciphering • Receivers can now

send back data• The n-way connection

“conference“

- Internet Protocol Multicast • A service based on Internet Protocol • The receiver group can be located within a mobile phone network, or anywhere in the Internet

- Supplementary and value-added services

• Access to Inter-and Intranet • faxing and E-mailing• Receiving breaking news and complete newspaper contents

• Traffic information for a planned trip

• Messages of commercial interest.

Mobile Stations

Class C

Class B

Class A

New Network Elements and Interfaces in GPRS

Gateway GPRS Support Node

• GGSN

1. SCREENING (FIREWALL)

2. TUNNELING

3. ROUTING

4. ADDRESS MAPPING

5. BILLING

6. PROTOCOL TRANSLATION

SGSN• PDP Context

• mobility management

• security

• Authentication

• Ciphering

• Billing

- The cause of early ciphering in the GPRS network• the security of the transmission increases • it will not be necessary to reconfigure all existing Base

Transceiver Stations

The PCU can be implemented in:• the Base Transceiver Station • the Base Station Controller • one of the two GPRS Support Nodes

• PCU Functions

• Cooperation between GSM/GPRS Elements

• connection to Public Land Mobile Networks

Inter-PLMN Backbone

Interconnection via PDN

Registration

Authentication & access control

Mobility Management

The network identities

• Location Area Identification

• Routing Area Identification

• Cell Global Identification

• IP Addresses

GSN numbers

Access Point Name

Packet Data Protocol Address

Combined IMSI/GPRS Attach

Context Activation

GPRS Detach

Mobile Originated Packet Transfer

Mobile Terminated Packet Transfer

THE END

Ch6 gprs&edge

possible gsm logo logo

logo circuit

data transmission logo

data tx

control data

connection points

transmission rates

destination information

Documents

Gprs edge-3 g srm

Chap5 R Mobiles GPRS EDGE

Raven EDGE/GPRS

Gprs vs Edge

GPRS EDGE Optimization

GPRS-EDGE Radio Network Optimization

Gprs Edge Kpi PK

Gsm Gprs Edge Overview

GPRS & EDGE

Gprs and Edge

Gprs anf edge Basic

(GPRS, EDGE, UMTS, LTE and…)

Motorola GPRS and EDGE

GPRS EDGE Present a Ion

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