4 G Mobile Communication System

FOURTH GENERATION MOBILE COMMUNICATION

SYSTEMS

4G

History3G and Its Limitations4G ConceptKey TechnologiesBenefitsApplicationsConclusion

CONTENTS

Mobile System Generations

First Generation (1G) mobile systems were designed to offer a single service, i.e., speech.

Second Generation (2G) mobile systems were also designed primarily to offer speech with a limited

capability to offer data at low rates. Third Generation (3G) mobile systems are expected to offer high-quality multi-media services and operate in different environments.

SHORT HISTORY of MOBILE TELEPHONE TECHNOLOGIES

THIRD GENERATION (3G)Major technologiesBluetoothWireless LAN (IEEE 802.x standards) – WiFiShort range wireless communicationsHighly utilized and very popular: offices, airports,

coffee shops, universities and schoolsTwo basic modes of operations:

-Ad-hoc networking: computers send data to one another

-Access point: sending data to the base station

Limitations of 3G

Difficulty of CDMA to provide higher data rates Need for continuously increasing data rate and

bandwidth to meet the multimedia requirements Limitation of spectrum and it’s allocation Inability to roam between different services To provide a seamless transport end-to-end

Mechanism To introduce a better system with reduces cost

4G Concept

“The user has freedom and flexibility

to select any desired service with

reasonable QoS and affordable price,

anytime, anywhere.”

Design Objectives

Next Generation will also have specificallyneeds to resolve it’s own multiple issues

Heterogeneous networks Access, handover Location coordination, resource coordination Adding new users Support for multicasting QoS, wireless security and authentication Network failure backup Pricing and billing

Heterogeneous Networks

Network Selection

Most Appropriate Network Selection Criteria

• Service Type -Data rate -QoS

• Available Resources

• User Context - Environment (When and Where) - Mobility - User preferences

Key 4G Technologies

OFDM (Orthogonal Frequency Division Multiplexing)

SDR (Software Defined Radio)

MIMO (Multiple-input multiple-output)

Interlayer OptimizationHandover and Mobility

Benefits Convergence of Cellular Mobile Networks and WLANs Benefits for Operators Higher bandwidths, Lower cost of networks and equipment,The use of licence-exempt spectrum, Higher capacity and Qos enhancement,

higher revenue.

Users Access to broadband multimedia services with lower cost and here mostly needed, Inter-network roaming. Convergence of Mobile Communication and Broadcasting Benefits for Operators Cellular operators will benefit from offering their customers a range of new broadband multi-media services in vehicular environments.

Users Users will benefit from faster access to a range of broadband multi- media services with reasonable QoS and lower cost.

Wireless System Discovery A multimode terminal attaches

to the WLAN and

scans the available

systems.

It can download

suitable software

manually or

automatically.

.

Applications Virtual Presence

Virtual navigation

Tele-geoprocessing applications

Tele-Medicine and Education

Crisis management

Multimedia– Video Services

CONCLUSION

As the history of mobile communications shows attempts have been made to reduce a number of technologies to a single global standard. 4G seems to be a very promising generation of wireless communication that will change the people’s life in the wireless world. 4G is expected to be launched by 2010 and the world is looking forward for the most intelligent technology that would connect the entire globe.

• www.google.com

• www.en.wikipedia.org/wiki/4G

• www.4g.co.uk• www.uscwc.com/4GReport

• www.four-g.net/

REFERENCES

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