4G TechnologyWelcome to anywhere

4G stands for 4th Generation of cellular wireless standards which is not one defined technology but rather a collection of technologies

Successor of 3G and convergence of High speed Internet

4g networks are projected to provide a a speed of 100Mbps while moving and 1Gbps while stationary

What is 4G…??

1G(first generation) # Developed in 1970s, is an analog system. # Based on FDMA # AMPS –First launched by USA allows voice calls in one country. #9.6 Kbps (PEAK) #Cross Talks #Poor voice Quality & call drops

History of wireless communication networks

1G

2G ( second generation) #Developed in 1980s is digital system consists of ‘0’s and ‘1’s.#Second generation is divided in two standards i) TDMA-time division multiple access -GSM(global system for mobile comm.) ii) CDMA-code division multiple access# 9.6-14.4kbps#sound quality increases

# SMS- short message service and Emails#2.5G – channels are optimized for packet data - 170kbps(peak) #No support for video transmission#Towers have limited coverage area#Abrupt call drops

3G ( Third Generation)#developed in 2000,promises faster data services#provides a speed of 384kbps while in motion and 3.1Mbps while in motion#supports video calling and broadband capacity #WCDMA- Wideband code division multiple access#Faster transmission and still working good.#first launched in 2001 in japan

Known as beyond 3G is Ultra High speed data

transmission. Based on OFDM-Orthogonal frequency

Division Multiplexing. Matching the current LAN speeds, it will

provide 100Mbps on the move. 4G networks are all IP(Internet Protocol)

based heterogeneous networks which allow to use multiple system like GPS,WLANs and CDMA at the same time.

4G ( Fourth Generation)

M- Mobile Multimedia

A-Anytime anywhere

G-Global Mobile Support

I-Integrated Wireless Solution

C-Customized Personal Service

4G is MAGIC…!!

4G has two standards:- LTE and WiMAX LTE- Long Term Evolution - Based on OFDM - use multiple orthogonal frequencies - Higher frequency bands - developed by 3GPP ( 3rd Generation Partnership Project) -in 2011, launched by major carriers in

USA WiMAX-Worldwide Interoperability for

Microwave Access -often referred as Wi-Fi on steroids.

A single carrier signal is divided into closely spaced multiple subcarriers in the same bandwidth.

Each subcarrier is then modulated with a conventional modulation scheme.

Orthogonal signals reduces FADING. Unlike single carriers, it has ability to cope

with several channel conditions like narrow band interface etc.

OFDM

Technologies used:- VoIP- voice over internet protocol MIMO antennas-multiple inputs and multiple

outputs increases effective throughput. IPv6 OFDM SDR- software defined ratio

HIGH SPEED 70Mbps Lower Latency Lower cost per bit than 3G systems Indoor and outdoors System capacity is 10 times of 3G Transmission delay time is 50ms or less Better conncetivity Ultra fast

Why 4G..??

4G

Virtual Presence Tele Medicine and education- remote health

monitoring of patients Real time conference meeting and seminars over internet. Better location based services.

Applications

3G Vs4G

Currently LTE is being tested and used in Bangalore, Pune and Kolkata.

US based Qualcomm and Sweden's Ericsson aim on TD-LTE, hoping it will help them to

gain market in India

4G in India

EVOLUTION