Third generation mobile networks (3G) offer wireless internet access and multimedia services at speeds up to 2Mbps. 3G uses technologies like UMTS and CDMA to provide services like video calling, web browsing, messaging, and wireless internet for applications like mobile banking and e-commerce. As 3G infrastructure and devices become more available, subscribers will enjoy instant and wireless access to internet and content on handheld devices.

1. Third Generation Mobile
(3G)

2. Third Generation Mobile (3G)
• Offering data rates greater than ISDN (144kbps), typically thought to be
384kbps and perhaps upto 2 Mbps when stationary near a base station.
• Six types of services:
• Interactive multimedia (video conferencing)
• High speed multimedia (“broadcast” TV)
• Medium speed multimedia (web browsing)
• Circuit switched data (FAX)
• Speech (telephony)
• Messaging (e-mail, SMS, …)
• All based on CDMA; Europe’s Universal Mobile Telecommunications
System (UMTS) will be Wideband CDMA (W-CDMA, 25 MHz channel
bandwidth):
• ETSI agreed to use a combination of wideband code division multiple access
(W-CDMA) and time division multiple access (TD/CDMA) on the air interface
• W-CDMA will be used to cover larger areas
• TD/CDMA for local (indoor) applications

3. 3rd Generation Partnership
Project (3GPP)
• Original scope was to produce globally applicable Technical
Specifications and Technical Reports for a 3rd Generation
Mobile System based on evolved GSM core networks and the
radio access technologies that they support Universal
• Terrestrial Radio Access (UTRA)1, W-CDMA, UMTS (in Europe)
and FOMA(in Japan)
• Amended to include the maintenance and development of the
Global System for Mobile communication (GSM) Technical
Specifications and Technical Reports including evolved radio
access technologies (e.g. General Packet Radio Service (GPRS)
and Enhanced Data rates for GSM Evolution (EDGE)).
• See: http://www.3gpp.org/
• ETSI is the 3GPP Secretariat

4. Third Generation Mobile (3G)
 Mobile telecommunication systems have been evolving for
three generations.
 AMPS is the first-generation system;
 GSM, IS-136, IS-95, and the low-tier systems described in
Section 1.3 are second-generation technologies.
 These systems have been designed primarily for speech with
low-bit-rate data services.
 They are limited by their vertical architectures.
 Most system aspects have been specified from services to the
bearer services.
 Consequently, any enhancements or new services affect the
network from end to end.

5. Third Generation Mobile (3G)
• Compared with second-generation systems, third-generation
systems offer
• Better system capacity;
• high- speed,
• Wireless internet access (up to 2 mbps), and
• Wireless multimedia services, which include audio, video, images, and data.
Several technologies, such as general packet radio service (GPRS) and EDGE.
• Bridge second-generation systems into third generation systems.

6. Third Generation Mobile (3G)
 In third-generation systems, new network technologies are
integrated into the existing second-generation core networks.
– ATM (Asynchronous Transfer Mode) backbone,
– network management, and
– service creation
 Air interfaces such as Wideband CDMA (W-CDMA) and
cdma2000 are major third-generation radio standards.
 The increasing number of Internet and multimedia
applications is a major factor driving the third-generation
wideband wireless technology.

7. Third Generation Mobile (3G)
 Some studies indicate that more than 20 percent of the adult
population in the United States are interested in wireless
Internet access.
 By the end of 1999, wireless data services were marketed as
modem access for laptop.
 As the advanced third-generation infrastructure becomes
available, and the inexpensive wireless handheld devices (e.g.,
wireless personal data assistant and wireless smart phones)
become popular, subscribers will begin to enjoy instant
wireless Internet access.

8.  The services include
 Sales force automation,
 Dispatch,
 Instant content access,
 Banking,
 E-commerce, and so on.

9. 3G TDMA standards
3G TD-SCDMA (Time Division Synchronous Code
Division Multiple Access)
– Developed by CATT (Chinese Academy of
Telecommunications Technology) and Siemens.
– Adopted by ITU as one of 3G options in 1999
– Existing GSM - 3G evolution through additions of high
data rate equipment in each GSM station -
1.6 MHz bandwidth
– Utilizes smart antennas, spatial filtering and joint detection
technologies

10. Broadband wireless services
• Wireless Local Loop (WLL)
– Demand for broadband internet and
computer access from businesses and homes
– Fixed wireless equipment have advantages such as fixed
path between T-R
– Microwave or millimeter radio frequencies used >28GHz -
wave length is very small - small high gain antennas.
– Especially useful in developing nations with less
telecommunications setup.

11. Emerging applications and markets for
broadband services
Wireless
Mid-market business
outside the urban core
Copper/xDSL
Small business
Central
Office
Fiber
Large business in
high-density urban areas
Cable
Residences
Backbone
Network
Central Office
DAX
ISP
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