4G-Fourth Generation

PREPARED BY Ashish khoyani(09Dit203)

Darshan Nayak(09Dit210)

2

What is fourth generation (4G) mobile systems?

Fourth generation mobile communications systems that are characterized by high-speed data rates ranging from 20 to 100 Mbps, suitable for high-resolution movies and television.

4G is not one defined technology or standard, but rather a collection of technologies and protocols aimed at creating fully packet-switched networks optimized for data.

3

Generations Timeline

1G-First GenerationUses frequency division multiple access

(FDMA) to communicate (every call in one area uses its own set of channels for communication)

World’s first operational cellular system

No support for wireless data4

1G ServicesStandard voice

No data services

No supplementary services

1G (Disadvantages) A series of incompatible networks

Limited support for roaming

Poor security

No support for wireless data

No third party applications

2G-Second Generation Uses digital encoding and includes CDMA, TDMA and

GSM. Text messages can be sent on 2G networks, but more bandwidth hungry applications require 2.5G.

Data Rates upto 9.6 to 64kbps

Digital techniques rather than analogue

Increased quality of service

Possibility of wireless data services

2G Services Improved standard telephony (speech)

Basic wireless data

Additional services(call barring etc.)

Depends on Network standard Operator policies

2G (Disadvantages)Low data Bandwidth

No audio/video

No collaborative services

No Location Services

3G- Third Generation3G networks promise next-generation service with

transmission rates of 144kbps to 2Mbps and higher that can support multimedia applications, such as video, video conferencing and Internet access. Both UMTS (WCDMA) and EDGE will support 3G services.

3G networks operate on a different frequency than 2G networks.

3G Services 2MHz video telemedicine

conferencing Video on Mobiledemand TV

electronicInternet radio newspaper

Bandwidth pagingaudioconferencing messaging Mobile

radio

Faxvoice

1KHzbi-directional unidirectional Broadcast/

multicast

3G(Disadvantages) Low Data Rates Speed

Transmission Delay

High Cost of 3G cellular phones

3G can only enjoy video conferencing only with other 3G subscribers.

4G-Fourth Generation4G = 4th Generation mobile communications

4G = B3G = Beyond 3rd Generation (UMTS, IMT-2000) mobile communications

Foreseen to become available after 2010.

2 major goals: broadband for all, access everywhere

Data rates speed upto 100Mbps

4G PossibilitiesPersonal Media Repository

Create a personal media repository that can be accessed from home and on the road to view photos, watch movies and listen to your personal music collection.

Comparison

Possible ApplicationsVirtual Presence: 4G system gives mobile users a

"virtual presence" (for example, always-on connections to keep people on event).

Tele-medicine: 4G will support remote health monitoring of patients.

Tele-geoprocessing: Queries dependent on location information of several users, in addition to temporal aspects have many applications.

Education

Continued…Broadband Access in

Remote Location4G networks will provide a

wireless alternative for broadband access to residential and business customers.

In addition, 4G will provide the first opportunity for broadband access in remote locations without an infrastructure to support cable or DSL access.

Challenges & needsLower price points only slightly higher than alternativesMore coordination among spectrum regulators around the

worldMore academic researchStandardization of wireless networks in terms of modulation

techniques, switching schemes and roaming is an absolute necessity for 4G

A voice-independent business justification thinkingIntegration across different network topologies

THANK YOU !