4 g technology
DESCRIPTION
the open uTRANSCRIPT
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4G TECHNOLOGY
Presented By
Lahiru diyamantha
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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
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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
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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
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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
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Previous Technology - 2G
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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
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Disadvantages in Previous Technology - 2G
Cell towers had a limited coverage area Jagged Decay curve
Discontinuous dropped calls
Analog –gradual sound reduction
“Spotty” coverage
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Spotty coverage
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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
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HSDPA and HSPA
HSPDA-High speed down link packet access
3.6 Mbps-14.2 Mbps
HSPA + evalved high speed packet access
1Mbps- 7Mbps
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Reasons for New Research
High input fees for the 3G service licenses
Great differences in the licensing terms
3G phones are expensive
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Fourth Generation
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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
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Ad Hoc Networks
self organization of networks of devices
Not necessarily connected to internet
4G will create hybrid wireless networks using Ad Hoc networks
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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.
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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
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4G standards
4G LTE- long term evolution 100Mbps(down) 50Mbps(up)
4G WiMax-world wide interoperability for micro wave access
128Mbps(down) 56Mbps(up)
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Thank you