**Presented by**AKASH KUMAR BEHERABRANCH---ECEREGD---1201298286

**4G WIRELESS SYSTEM**

MENTOR--PROF. SAUMENDRA BEHERA

Index:--Introduction.History.About 4G.Features.Wireless Technologies Used in

4G.Applications.Advantage & Disadvantages.Conclusion.Reference.

Introduction:-- The first generation, 1G wireless mobile

communication systems, was introduced in the early 1980s. 1G wireless was analog and supported the first generation of analog cell phones with the speeds up to 2.4kbps.

The second generation, 2G system, fielded in the late 1980s.It was planned mainly for voice transmission with digital signal and the speeds up to 64kbps.

The third generation, 3G wireless system, also called UMTS (Universal Mobile Telecommunications Standard), was developed in the late 1990s .3G is not only provided the transmission speeds from 125kbps to 2Mbps, but also included many services, such as global roaming, superior voice and video quality.

To vanish the disadvantages of 3G, 4G came to the communication world.

The fourth generation, 4G is a conceptual framework just raised in 2002. The speeds of 4G can theoretically be promised up to 1Gbps. The beyond will be 5G with incredible transmission speed with no limitation for access and zone size.

The process began with the designs in the 1970s that have become known as 1G. The earliest systems were implemented based on analog technology.

The 2G (second generation) systems designed in the 1980s were still used mainly for voice applications but were based on digital technology, including digital signal processing techniques.

The 2.5G it is basically an enhancement of the two major 2G technologies to provide increased capacity on the 2G RF (radio frequency) channels and to introduce higher throughput for data service.

History:--

COMPARING KEY PARAMETERS OF 4G WITH 3G

3G 4GMajor Requirement Driving Architecture

Predominantly voice driven-data was always add on

Converged data and voice over IP

Network architecture Wide area cell based Hybrid –integration of wireless LAN and wide area

Speed 384 Kbps to 2 Mbps 20 to 100 Mbps in mobile mode

Frequency Band 1800-2400 MHz Higher frequency bands (2-8 GHz)

Switching Design Basis Circuit and Packet All digital with packetized voice

Access Technologies W-CDMA, OFDM and MC-CDMA (Multi Carrier CDMA)

Component Design Optimized antenna design, multi-band adapters 

Smarter Antennas, software multilane and wideband radios

IP  A number of air link protocols, including IP 5.0 

All IP (IP6.0)

The 4G systems will interoperate with 2G and 3G systems.

4G systems will be fully IP‐based wireless Internet.

Data transfer rate up to 100 Mbps for high mobility and 1G bps for low mobility .

Global mobility and service portability.Entirely packet-switched networks.Digital in nature .Wider Bandwidths 100Mhz.

About 4G:--

4G devices:--

3d goggle phone Nokia’s wristband phone Smart Mobile phones

Support for interactive multimedia, voice, streaming video, Internet, and other Broad band services.

IP based mobile system.High speed, high capacity, and low cost‐per‐bit Global access, service portability and scalable

mobile services.Seamless switching, and a variety of Quality of

Service‐driven services.Better scheduling and call‐admission‐control

techniques.Better spectral efficiency.

Features:--

Wireless technologies used in 4G:--

A. OFDM (ORTHOGONAL FREQUENCY DIVISION MULTEPLEXING).

B. UWB (ULTRA WIDE BAND).

C. MILLIMETER WIRELESS.

D. SMART ANTENNAS.

E. LONG TERM POWER PREDICTION.

F. SCHEDULING AMONG USERS.

G. ADAPTIVE MODULATION AND POWER CONTROL.

• Telecommunication.

• 4G Car.

• 4G and public safety.

• Sensors in public vehicle.

• Cameras in traffic light.

• First responder route selection.

• Traffic control during disasters.

Application:--

Support for interactive multimedia, voice, streaming video, Internet, and other broadband services.

IP based mobile system.

High speed, high capacity, and low cost-per-bit.

Global access, service portability, and scalable mobile services Seamless switching, and a variety of Quality of Service-driven services.

Better scheduling and call-admission-control techniques.

Ad-hoc and multi-hop networks .

Better spectral efficiency. Seamless network of multiple protocols and air

interfaces.

Advantages:--

Expensive.

Battery uses are more.

Hard to implement.

Need complicated hardware.

Disadvantages:--

All totally the best way to help all users is to use 4G as the next wireless system and in totally it is safety and secure for public, this the need that demands the solution.

It will be implemented in the coming years which are a miracle in the field of communication engineering technology.

Today’s wired society is going wireless and if it has problem, 4G is answer.

Conclusion:--

References:--