Fourth Generation 4g Wireless Technology
                     
PowerPoint Presentation



Fourth Generation 4g 
Wireless Technology


What is 4G

• 4G is not one defined technology or but its a 
collection of technologies at creating fully packet-
switched networks optimized for data.

• 4G Networks are basically made to provide speed of 
100Mbps while moving and 1Gbps while stationary.


Code Division Multiple Access

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Types of Multiplexing

• FDMA – Frequency Division Multiple Access
• Each phone call is allocated one frequency for the entire 

duration of the call

• TDMA - Time Division Multiple Access 
• Each phone call is allocated a spot in the frequency for a small 

amount of time, and "takes turns" being transmitted

• CDMA - Code Division Multiple Access 
• Each phone call is uniquely encoded and transmitted across 

the entire spectrum, in a manner known as spread spectrum 
transmission


What is 4G?
• Fourth Generation Technology

• Faster and more reliable
• 100 Mb/s 
• Bluetooth, Wired, Wireless 
• Ad Hoc Networking
• IPv6 Core
• OFDM used instead of CDMA
• Lower cost than previous generations
• Multi-standard wireless system
• Potentially IEEE standard 802.11n
• Most information is proprietary


Communications Architecture

• Broadcast layer: 
• fix access points, (i.e.) cell tower connected by fiber, 

microwave, or satellite (ISP) 
• Ad-hoc/hot-spot layer:

• wireless LANs (i.e. internet at Starbuck’s) 


Communications Architecture
• Personal Layer Gateway:

• devices that connect to upper layers; cell phone, fax, voice, 
data modem, MP3 players, PDAs

• Info-Sensor layer:
• environmental sensors

• Fiber-optic wire layer: 
• high speed subterranean labyrinth of fiber optic cables and 

repeaters


Ad Hoc Networks
• Spontaneous self organization of networks of devices
•  
• Form of mesh networking–Very reliable

• Not necessarily connected to internet

• 4G will create hybrid wireless networks using Ad Hoc 
networks


Enhance 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


Broadband access in Remote 
location

• 4G will provide a wireless alternative for broadband 
access

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


THANKS