1. Presentation OF CSS
ON
2G AND 3G TECHNOLOGY

2. Introduction

3. 2G Technology
DEFINITION
• Second-generation wireless telephone
technology.
• Commercially launched on the GSM
standard.
• Fully digital 2G networks replaced analog
1G.

4. History
• In 1990 (2G) mobile phone systems
emerged.
• In 1993 2G introduced SMS.
• In 1998 the first downloadable content
sold to mobile phones was the ring tone.
• In 1999 first internet service on mobile
phones was introduced by NTT DoCoMo
in Japan

5. Features of 2G
• Digital voice service
• Push-to-Talk (PTT)
• short message service (sms)
• conference calling
• caller iD
• voice mail
• simple data applications such as
• email and Web browsing

6. Demerits of 2G
• GPRS not supported.
• Weaker digital signal.
• MMS service not provided.
• No secondary front-facing camera for
video calling etc.
• The Bluetooth only supports headsets.

7. 2.5G Technology
• second and a half generation Technology.
• developed in between its predecessor, 2G,
and its successor, 3G.
• "2.5G" usually describes a 2G cellular
system combined with General Packet
Radio Services (GPRS).

8. Features of 2.5G
• all 2G features plus:
• mms (multimedia message service)
• Web browsing
• real-time location-based services such as
directions
• Basic multimedia
• audio and video clips, games and images

9. 2.75 Technology
• EDGE data connectivity.
• Faster than GPRS (sometimes called
2.5G)
• EGPRS

10. Features of 2.75G
• Better performance for all 2/2.5G services
• double the speed of the 2.5G EDGE
network

11. 3G Technology
• Launched by NTT DoCoMo in Japan on 1
October 2001.
• 3rd generation mobile telecommunications.
• Emtel Launched the first 3G network in Africa.
• generation of standards for mobile phones and
mobile telecommunication.
• By June 2007, the 200 millionth 3G subscriber
had been connected.

12. Features of 3G
• support for all 2G and 2.5G features plus:
• increasing bandwidth to DSL speeds, with a
range of 144 Kbps to 2+ mbps1.
• greater security than their 2G predecessors.
• Full motion video
• streaming music
• 3D gaming
• Faster Web browsing

13. Applications of 3G
• Mobile TV
• Video on demand
• Videoconferencing
• Telemedicine
• Location-based services

14. Comparison between 2G and 3G
2G 3G
• Digital voice service • support for all 2G and
• Push-to-Talk (PTT) 2.5G features plus:
• short message service • Full motion video
(sms) • streaming music
• conference calling
• 3D gaming
• caller iD
• Faster Web browsing
• voice mail
• simple data applications • VOIP
such as
• email and Web browsing