Presented By:

shuBham jha

B.tech. iii year

comPuter science and engineering

Introduction to Wireless Introduction to Wireless CommunicationCommunication

Our ultimate goal is to communicate with any type of information with anyone, at anytime, from anywhere. This is possible with the aid of WIRELESS TECHNOLOGY.

UserFriendliness

UserPersonalisation

USER

User Sensitivity

Types of Types of Wireless CommunicationWireless Communication

Cellular Networks Wireless Local Area Network

Cellular NetworksCellular Networks

Evolved from mobile telephone as voice conversation and communication tools for private and business uses

Wireless Local Area NetworkWireless Local Area Network

Emerged from computer network. It helps business user to expand their service areas by using LAN (faster data transport)

Evolution from 1g to 4g systemEvolution from 1g to 4g system

1g Wireless System :Developed in 1980s and completed in early 1990’s

2g Wireless System :The 2G phase began in the 1990s and much of this technology is still in use.

3g Wireless System :It was developed in the late 1990s until present day,Japan is the first country having introduced 3G nationally

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3G WIRELESS SYSTEM3G WIRELESS SYSTEM

Services include: ◦ Global roaming◦ Superior voice quality and video conference◦ Information for web surfing, music, news,

corporate intranet, transportation service etc◦ Transmission speeds from 125kbps to 2Mbps

Issues on 3G wireless systemIssues on 3G wireless system

High input fees for the 3G service licenses

Inefficient to meet needs of future high-performance

Multiple standards for 3G Require wider bandwidthLack of coverage because it is still new

service

4G wireless system4G wireless system

4G technologies are sometimes referred to by the acronym "MAGIC," which stands for Mobile multimedia, Anytime/any-where, Global mobility support, Integrated wireless and Customized personal service.

Current TechnologyCurrent Technology

TDMA :Time Division Multiple Access, is a technique for dividing the time domain up into sub channels for use by multiple devices.

CDMA :Code Division Multiple Access, allows every device in a cell to transmit over the entire bandwidth at all times.

4G Hardware4G Hardware

Ultra Wide Band Networks :Ultra Wideband technology, or UWB, is an advanced transmission technology that can be used in the implementation of a 4G network.

Smart Antennas :: Multiple “smart antennas” can be employed to help find, tune, and turn up signal information

General 4G Services and 4G General 4G Services and 4G ApplicationsApplicationsLocalized/Personalized Information Organizational services Communications services and applications Entertainment services Mobile commerce (M-Commerce )

Features of 4G Wireless SystemsFeatures of 4G Wireless Systems Support interactive multimedia User friendlinessHigh speed, high capacity and low cost per bit Higher band widths

User and Industry Expectations User and Industry Expectations

Wireless users can be categorized into generalized segments :◦ The Age segment ◦ The Internet Usage segment ◦ The Mobile Professional segment

Comparison between 3g and 4gComparison between 3g and 4g

 

Major Requirement 3g 4g

Speed 384 Kbps to 2 Mbps   20 to 100 Mbps  

Frequency Band   Dependent on country   Higher frequency bands (2-8 GHz)  

Bandwidth   5-20 MHz   100 MHz (or more)  

Switching Design Basis  

All digital with packetized voice  

Access Technologies  

Circuit and Packet

W-CDMA OFDM and MC-CDMA  

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Generation OverviewTechnology 1G 2G 2.5G 3G 4G

First design 1970 1980 1985 1990 2000

Implementation

1982 1991 1999 2002 2010?

Service Analog voice

Digital voice, SMS

Packaged data

Broadband data up to 2 mb/s

IP-oriented unlimited multimedia data

Standards AMPS TDMA, CDMA, GSM

GPRS, EDGE

W-CDMA, HSOPA

WiMAX, HSOPA

Data bandwidth

1.9 kbps 14.4 kbps 384 kbps 2 mbps 200 mbps

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ApplicationsApplications

• E-commerce• Business/Work• Private Life• Vehicular• Public Place• Entertainment• Education 

ConclusionConclusion

4G will be a Convergence Platform providing clear advantages in terms of Coverage, Bandwidth, Power Consumption, variety of Services, ranging from Pop-Up advertisements to Location-Based services and IP Data casting ones.

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THANK YOUTHANK YOU