4G Wireless Technology. Where wave moves faster than thoughts

1. 4G Wireless Technology. Where wave moves faster than thoughts

2. Summary in Advance • 4G can support high-speed (up to 100Mbps even 1Gbps), but high-speed is not 4G • 4G will focus on Open Wireless Architecture (OWA) technology instead of purely high-speed transmission • Mobile WiMAX can NOT support seamless mobility, but is OK for nomadic or limited mobility • TD-SCDMA has many technical issues to be solved: Network Optimization and Further R&D will take at least ten years • Wireless Mobile Internet will face big challenge if the underlying wireless transmission architecture is not open • Open spectrum planning is relying on optimal modeling of digital GPS map and digital spectrum map of the service area

3. Introduction To 4G Technology • 4G : Fourth Generation • 4G is the abbreviation for the fourth generation of wireless technology.  • The tech-world is no more moving on RJ45 or so called Cables. • 4G defines a invisible communication and a fastest visualization. • It has converted the myth of virtual appearance to a fact

4. A brief History

5. What made 4G to be invented ?? The draw backs of 3G inspired the researchers to go Beyond limitations.Issues of 3G network. • High input fees for 3G service Licenses. • Multiple standards of 3G across the globe. • Require wider band-width. • Lack of coverage due to high cost.

6. What is 4G ??? • It provides a comprehensive IP solution where voice , data and multimedia can be given to user on an “ anywhere ,anytime” basis. • It includes several types of broadband wireless communication system access including cellular telephone system. • It provides seamless mobility and internet access at a rate of 100 Mbps.

7. Technologies Behind 4G • OFDM (orthogonal frequency division multiplexing) • UWB (ultra wide band) • Smart antennas • IPv6(Internet Protocol Version 6)

8. OFDM • OFDM is the advanced multiplexing technique. • It transmits large amounts of digital data over a radio wave. • OFDM works by splitting the radio signal into multiple smaller sub-signals that are then transmitted simultaneously at different frequencies to the receiver . • By inserting a cyclic prefix between adjacent OFDM signal inter signal interference is virtually eliminated if the max. channel delay spread is less than the time interval of cyclic prefix. • In OFDM the subcarrier pulse used for transmission is rectangular. • Here modulation can be performed by an IDFT ,which can be generated very efficiently as an IFFT . so, receiver only needs a FFT to reverse this process.

9. UWB • An advanced technology that can be used in 4G technology. • It is typically detected as noise. • It can use any part of the frequency spectrum, which means that it can use frequencies that are currently in use by other radio frequency devices . • It uses a frequency of3.1 to 10.6 Hz. • It uses less power , since it transmits pulse instead of continuous signal . • Special antennas are needed to tune and aim the signal.

10. IPV6 • IPv6 means Internet Protocol Version 6. • The Internet Protocol (IP) is the method or protocol which data is sent from one computer to another on the internet. • Each computer (known as a host) on the Internet has at least one IP that uniquely identifies it from all other computers on the Internet. • It includes128 bits, which is 4 times more than 32bits IP address in IPv4.

11. Smart Antennas • Smart antenna can be employed to find tune ,and turn up signal information . • Smart antenna can send signal back in the same direction that they come from. There are two types of smart antennas - • switched beam antenna:- It has fixed beams of transmission, and switch from predefined beam to another when the user with the phone moves throughout the sector. • Adaptive array antenna :-It represents the most advanced smart antenna approach to data using a variety of new signal It represent the most advanced smart antenna approach to date using a variety of new signal processing algorithms to locate and track the user, minimize interference , and maximize intended signal reception.

12. Performance (QoS) • In wireless networks, Quality of Service (QOS) refers to the measure of the performance for a system reflecting its transmission quality and service availability. • 4G is expected to have at least a reliability of 99.99%. In 4G QOS may be divided in following ways- • Transaction-level QOS describes both the time it takes to complete a transaction and the packet loss rate. • Circuit-level QOS includes call blocking for new as well as existing calls . • User-level QOS depends on user mobility and application type .

13. Software Defined Ratio • A software defined radio is one that can be configured to any radio or frequency standard through the use of software. • The phone should automatically switch from operating on a CDMA frequency to a TDMA frequency whenever it is required. • Roaming can be an issue with different standards, but with a software defined radio, users can just download the interface upon entering new territory, or the software could just download automatically.

14. Comparison in Details

15. The Evolution in Wireless technology

16. Evolution in mobile sector

17. Features • Support for multimedia services like teleconferencing and wireless internet. • Wider band width and higher bitrates. • Entirely packet – switched network. • Global mobility and service portability. • Support for previous wireless technologies. • High internet speed. • Tight network security.

18. Applications • In traffic control. • Location application. • Telemedicine . • In crisis management application. • Tele-Conferencing.

19. Conclusion • The world with internet will be on 4G soon. • But the evolution doesn’t end here. • It will start again in coming decade to give birth to new technology. • If we tell our-selves tech-savvy people then 4G defines proper explanation to cutting-edge technology.

21. Thanks