Transcript
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
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