4G wireless system

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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 3. Evolution from 1G to 4G System 1G Wireless System: Developed in 1980s and completed in early 1990s. 2G Wireless System :The 2G phase began in 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 to having introduced 3G nationally. 4. FIRST GENERATION CELLULAR COMMUNICATION (1G) 1G was Analog system and was developed in 1970s. 1G system enabled to make voice calls in one country. It was based on FDMA, Frequency Division Multiple Access. 5. DRAWBACKS OF 1G Poor voice quality. Poor battery life. Large phone size. Poor capacity and poor handoff reliability. 6. 2G CELLULAR COMMUNICATION 2G system phones were developed in 1990s. The improved features in 2G were: 1. Transmission quality. 2. System capacity. It meet the demands of following: 3. Fax. 4. Short messages. 5. Data transmission going rapidly. Data transmission was digital. 7. DRAWBACKS OF 2G Digital signals are weaker and may not reach the cell tower. Data dropouts in its way. Range of sound conveyance is less. Data capabilities are limited. 8. 3G CELLULAR COMMUNICATION Services include: 1. Mobile TV 2. Superior voice quality and video conference. 3. Mobile Internet access and Video calls. 4. Transmission speed 125kbps to 2Mbps 5. Offers greater Security of data than 2G. 9. ISSUES ON 3G WIRELESS SYSTEM Lack of coverage because it is still new service. People who have 3G mobiles can only enjoy its features with 3G subscribers only. 10. 4G WIRELESS SYSTEM 4G technologies are sometimes referred to as MAGIC which stands for Mobile multimedia, Anytime/any-where Global mobility support Integrated wireless and Customized personal service. 11. WHATS NEW IN 4G? High Transfer rate Internet Access anywhere Ability to move around with same IP address Utilization of smart Antenna High resolution mobile TV 12. How 4G becomes faster? Wireless Technologies used in 4G: 1.OFDM (Orthogonal Frequency Division Multiplexing) 2. UWB (Ultra Wideband) 3. IPv6.0 13. What is OFDM? OFDM stands for Orthogonal Frequency Division Multiplexing. It transmits large amount of Digital Data over a Radio Wave. HOW IT WORKS? It distributes the Data over a large number of Carriers that are spaced apart at precise frequencies. This spacing provides the orthogonality in this technique which prevents the Demodulotors from seeing frequencies other than their own. 14. ULTRAWIDE BAND 4G can use any part of frequency spectrum. Normally it uses a frequency of 3.1 to 10.6 Hz. This consumes less power since it transmits pulse instead of continuous signal. 15. SMART ANTENNA Smart Antenna can be employed to find tune and turn up signal information. They can send signal back in the direction as they come from. Allow the same Radio frequency to be used by other user without worry of interferences. 16. IPv6.0 IPv6 means Internet Protocol Version 6. Each Computer on Internet has one unique IP which regulates the Data transmission from one computer to another. It includes 128 bits, which is 4 times more than 32 bits IP address in IPv4. 17. ADVANTAGES Support interactive Multimedia User friendliness High speed, high capacity and low cost per bit Higher band widths. 18. DISADVANTAGES Battery uses is more Hard to implement Need complicated hardware 19. CONCLUSION 4G will be Convergence Platform providing clear advantages in terms of Coverage, Bandwidth, Power Consumption, variety Services ranging from Pop-Up advertisements to Location-Based services and IP Data casting ones. 20. THANKS FOR YOUR ATTENTION