: general packet radio service

GPRS (General Packet Radio Service)

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Hasan Sezer

ROADMAP

What is GPRS?Why GPRS?What are the usage areas?Advantages of GPRSGPRS technology provides the

benefitsThe Speed of GPRSGPRS Network

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Main Components of GPRS Network

GPRS Communication problemsOne of the using place (Vehicle

Tracking System)Video Conference3GSM3GSM NetworkWhat is Edge?

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Edge TechnologyModulation AlgorithmMeasurement for EdgeConclusion

What is GPRS?

General Packet Radio Switching Service(GPRS) is a packet-switched wireless technology

Introduced as a bearer service for Global System for Mobile Communications (GSM):

-circuit switched technology-bandwidth: 900 MHz & 1800

MHz(Europe & Asia), 1900 MHz(Nort America)

Continue with what is GPRS

Used for mobile phonesFrom the beginning of 2001Offer the possibility to charge

by amount of data sent rather than connect time

ex:You aren’t charged when you are reading a page

Why GPRS?

GPRS is the world's most wide wireless data service

Available now with almost every GSM networks

It is a connectivity solution based on Internet Protocols that supports a wide range of enterprise and consumer applications

What are the usage areas?

Surf on InternetSending/receiving e-mailsVideo conferenceConnection with PC’s and

other devicesMultimedia messagesLocation-based services

The advantages of GPRS?

Spectral efficiency: Through the shared use of radio channels, GPRS allows a better traffic management,service access to a higher number of users

Web Browsing: access to the World Wide Web

Cont...

Email: access to mailboxes without protocol conversions

Remote LAN Access: network access to applications with the same desktop environment

Chat: end of SMS limitations (160 characters)

Audio: Stream audio capability with commercial quality

Cont...

File transfer using FTP, HTTP or other protocols without restrictions.

Speed: With a theoretical maximum of 171,2 Kbps (using all of the GSM 8 timeslots simultaneously) high gains can be achieved in the data transmission speed.

GPRS Technology Provides the Benefits

Enables the use of a packet-based air interface over the existing circuit-switched GSM network, which allows greater efficiency in the radio spectrum because the radio bandwidth is used only when packets are sent or received.

Cont.. Benefits

Supports minimal upgrades to the existing GSM network infrastructure for those network service providers who want to add GPRS services on top of GSM, which is currently widely deployed.

Supports virtual private network (VPN)/Internet service provider (ISP) corporate site access.

Cont… Benefits

Supports larger message lengths than Short Message Services (SMS).

Supports data rates of about 56 Kbps, which is greater than the traditional 14.4 Kbps rate available in a circuit-switched connection.

The speed of GPRS

Because of the technology that is been using there is not an exact speed number.

We can say as an avg. in teoritical 171.2 kilobit/sec but in our day of tech. in our country it is 56 kilobit/sec

Mostly the speed of GPRS communication is about with the sites speed

GPRS Network

Main components of a GPRS network:

Mobile Station (MS) Base Station Subsystem (BSS) Serving GPRS Support Node

(SGSN) Gateway GPRS Support Node

(GGSN) Packet Data Network (PDN) Equipment Identity Register (EIR) Visitors Location Register (VLR) Home Location Register (HLR)

Cont..

The mobile station (MS)comprises all user equipment and software needed for communication with a Wireless telephone network.

The Base Station Subsystem (BSS) is the section of a traditional cellular telephone network which is responsible for handling traffic and signaling between a mobile phone and the Network Switching Subsystem.

Cont..

Visitor Location Register (VLR) is a database - part of the GSM mobile phone system - which stores information about all the mobiles that are currently under the jurisdiction of the MSC (Mobile Switching Center) which it serves.

Gateway GPRS Support Node (GGSN) The General Packet Radio Service (GPRS) provides packet radio access for mobile Global System for Mobile Communications (GSM).

GPRS Communication Problems

communication / synching problems

Web surfing over GPRSYou can forget to close it pop

up’s and viruses

One of the using place

Equipments of The Vehicle Tracking System

Cont.. Vehicle Tracking System

Cont.. Vehicle Tracking System

Q: Why it uses GPRS for vehicle tracking?

A: Because it is cheap and more efficent than other system (e.g SMS). You pay only that you used.

Q: How it works? A: your receiver take you wave

signals to the sattelite. By the help of GPRS it sends data to the map system that placed in Central Station. Customer connected to the system and tracking started.

Video Conference

For operators, the adoption of GPRS is a fast and cost-effective strategy that not only supports the real first wave of mobile Internet services, but also represents a big step towards 3GSM (or wideband-CDMA) networks and services.

3 GSM

What is the 3 GSM

understood as third generationlatest addition to the GSM family is a collective term for new

procedures in communication, new standards, and new devices

will enhance the quality and speed of services in mobile telephony.

Cont… 3GSM

enables the provision of mobile multimedia services such as music, TV and video, rich entertainment content and Internet access

The technology on which 3GSM services are delivered is based on a GSM network enhanced with a Wideband-CDMA (W-CDMA) air interface - the over-the-air transmission element.

3GSM Network

ITU has approved, as official 3G standards, a set of systems that have arisen from agreement between various companies, grouped under the general name International Mobile Telecommunication 2000 (IMT2000), including five radio-transmission technologies:

Cont.. 3GSM Network

IMT 2000 radio-transmision technologies IMT-DS Direct Sequence (referred to as

UTRA-FDD, W-CDMA, UMTS-FDD) IMT-MC Multi-Carrier (referred to as

CDMA2000) IMT-TC Time Code (referred to as UTRA-

TDD) and China's TD-SCDMA IMT-SC Single Carrier (referred to as

UWC-136/EDGE) IMT-FT Frequency Time (referred to as

DECT)

Cont..

Of these five standards, basically three technologies have been popularized, namely:

CDMA20004 WCDMA5 EDGE

What is Edge ?

Enhanced Data rates for GSM Evolution (EDGE) or Enhanced GPRS (EGPRS) is a digital mobile phone technology that allows increased data transmission rates and improved data transmission reliability.

EDGE has been introduced into GSM networks around the world since 2003

Cont..

EDGE can be used for any packet switched application, such as internet. High-speed data applications such as video services

Cont..

Technology

Although EDGE requires no hardware or software changes to be made in GSM core networks, base stations must be modified. EDGE compatible transceiver units must be installed and the base station subsystem (BSS) needs to be upgraded to support EDGE.

Cont…

New mobile terminal hardware and software is also required to decode/encode the new modulation and coding schemes and carry the higher user data rates to implement new services.

Cont..

Cont..

Further enhancements to GSM networks are provided by EDGE technology. EDGE provides up to three times the data capacity of GPRS.

Triple their data rate per subscriber, or add extra capacity to their voice communications. EDGE uses the same TDMA (Time Division Multiple Access) frame structure.

Cont..

EDGE is a simple software upgradeDue to very small incremental cost

of including EDGE capability in GSM network deployment,all new GSM infrastructure deployments are also EDGE capable and nearly all new mid- to high-level GSM devices also include EDGE radio technology.

Cont..

EDGE allows the delivery of advanced mobile services such as the downloading of video and music clips, full multimedia messaging, high-speed color Internet access and e-mail on the move.

Cont..

Modulation Algorithm

8PSK (8 Phase Shift Keying) is a phase modulation algorithm

Phase modulation is a version of frequency modulation where the phase of the carrier wave is modulated to encode bits of digital information in each phase change.

Cont..

The "PSK"in 8PSK refers to the use of Phased Shift Keying which is a form of phase modulation which is accomplished by the use of a discrete number of states. 8PSK refers to PSK with 8 sates. With half that number of states, you will have QPSK (Quadrature Phase Shift Keying). With twice the number of states as 8PSK, you will have 16PSK.

Cont..

Because QPSK has 8 possible states 8PSK is able to encode three bits per symbol.

8PSK is less tolerant of link degradation than QPSK, but provides more data capacity.

Measurement for Edge

Provides a solution for measuring non-constant amplitude signals

EVM = Error Vector MagnitudeA new measurement has been

defined for EDGE. This new measurement is the

EVM is a measure used to quantify the performance of a digital radio transmitter or receiver. 

Cont..

The HP 8944x was the first instrument to prototype the EVM measurement and will probably be the first to support the standardized measurement.

Conclusion

It’s new technology and very speed

Changing our life in good way with the growth wireless of the technology

We can connect to the internet with this device in anywhere

WE LOVE GPRS…

Questions

Do you prefer using GPRS why?What are the differences between 3G and

GPRS?What usage areas has GPRS?

FOUNTAIN

http://www.google.com.tr/search?hl=tr&defl=en&q=define:GPRS&sa=X&oi=glossary_definition&ct=title

http://www.comtechm2m.com/m2m-technology/gprs-tutorial.htm

http://abonelik.tnn.net/gprs_faq.asphttp://

www.gsmworld.com/services/index.shtml