4 g technology

4G TECHNOLOGY

Presented By

Lahiru diyamantha

4G Definition

4G is not one defined technology or standard,but rather a collection of technogies at creating fully packet switched networks optimized for data.

4G Networks are projected to provide speed of 100Mbps while moving and 1Gbps while stationary

1G Technology

1G refers to the first-generation of wireless telephone technology was developed in 1970’s

1G had two major improvements: the invention of the microprocessor the digital transform of the control link

between the phone and the cell site.

Analog signal

2G Technology

Around 1980’s

Better quality & capacity - More people could use there phones at the same time

Digital Signals – consist of 0’s & 1’s

Previous Technology - 2G

Allows for lower powered radio signals that require less battery

Power–CODEC introduction -program that encodes and decodes digital data stream or signal

Translates data from digital to analog and vice versa

Previous Technology - 2G

Advantages in Previous Technology - 2G

The digital voice encoding allows digital error checking

increase sound quality lowers the noise level Going all-digital allowed for the

introduction of digital data transfer SMS –“short message service” E-mail

Disadvantages in Previous Technology - 2G

Cell towers had a limited coverage area Jagged Decay curve

Discontinuous dropped calls

Analog –gradual sound reduction

“Spotty” coverage

Spotty coverage

3G Technology

Large capacity and broadband capabilities

Allows the transmission of 384kbps for mobile systems and up to 2Mbps

High data rates at lower incremental cost than 2G–Global roaming

HSDPA and HSPA

HSPDA-High speed down link packet access

3.6 Mbps-14.2 Mbps

HSPA + evalved high speed packet access

1Mbps- 7Mbps

Reasons for New Research

High input fees for the 3G service licenses

Great differences in the licensing terms

3G phones are expensive

Fourth Generation

What is 4G?

Fourth Generation Technology Faster and more reliable 100 Mb/s Lower cost than previous generations Multi-standard wireless system Bluetooth, Wired, Wireless Ad Hoc Networking OFDM used instead of CDMA Most information is proprietary

Ad Hoc Networks

self organization of networks of devices

Not necessarily connected to internet

4G will create hybrid wireless networks using Ad Hoc networks

Broadband access in Remote location.

4G will provide a wireless alternative for broadband access

It will provide first opportunity for broadband access in remote locations without an infrastructure to support cable or DSL access.

Mobile Gaming

Experience enhance wireless capabilities that deliver mobile gaming interaction with less than five seconds

Play online multi player games while traveling at high speeds or sitting outside

4G standards

4G LTE- long term evolution 100Mbps(down) 50Mbps(up)

4G WiMax-world wide interoperability for micro wave access

128Mbps(down) 56Mbps(up)

Thank you