Presented By:

Anupama

Shelly

Sonia

MCA-2

Introduction to wireless communication

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

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Types of wireless Communication

• Cellular Networks

• Wireless local area network

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Cellular Networks

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

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Wireless Local Area Network

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

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Evolution 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 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

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Issues 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 bandwidth

• Lack of coverage because it is still new service

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4G 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.

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Current 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.

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4G 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

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General 4G Services and 4G Applications

• Localized/Personalized Information

• Organizational services

• Communications services and applications

• Entertainment services

• Mobile commerce (M-Commerce )User

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Features of 4G Wireless Systems

• Support interactive multimedia

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• High speed, high capacity and low cost per bit

• Higher band widths

• Terminal Heterogeneity

• Network Heterogeneity

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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 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 

Conclusion

• 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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