Presented By:

S Surya Prakash Reddy

Introduction to 4G wireless communication

4G refers to the fourth generation of cellular wireless standards. It is a successor to 3G and 2G standards. The nomenclature of the generations generally refers to a change in the fundamental nature of the service.

USER

Types of wireless Communication

• Cellular Networks

• Wireless local area network

Cellular Networks

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

Wireless 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 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

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

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

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.

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.

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

General 4G Services and 4G Applications

• Localized/Personalized Information

• Organizational services

• Communications services and applications

• Entertainment services

• Mobile commerce (M-Commerce )

Features of 4G Wireless Systems

• Support interactive multimedia

• User friendliness

• High speed, high capacity and low cost per bit

• Higher band widths

• Terminal Heterogeneity

• Network Heterogeneity

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.