07-07-2012, 04:48 PM
4G communication
[attachment=27194]
What is Mobile Computing
Mobile computing is a generic term describing one's ability to use technology while moving, as opposed to portable computers, which are only practical for use while deployed in a stationary configuration.
Highlights:
Hottest area for research.
Developing at an astounding speed.
Lead to the evolution of various generations.
Examples:
Wearable computers
Smartphone etc.,
Evolution:
Continuous in amplitude and time
– Variations in the signal – disrupts over long distances
• Simplest type to wireless data
• Average between 4,800 to 9,600 bps (bits per second)
Speech Chat was the only service.
Uses FDMA (Frequency Division Multiple Access)
Solves fundamental problems like Roaming Across Domain, non-interrupted communication.
Disadvantages:
– High input fees for the 3G service licenses
– Great differences in the licensing terms
– Current high debt of many telecommunication companies, making it more of a challenge to build the necessary infrastructure for 3G.
Reasons for new research above 3G:
3G phones are expensive
• Lack of 2G mobile user buy-in for 3G wireless service
• Lack of coverage because it is still a new service
Open Wireless Architecture(OWA)
Provides common platform to complement different access technologies in an optimum way for different service requirements
Also called converged broadband wireless platform
[attachment=27194]
What is Mobile Computing
Mobile computing is a generic term describing one's ability to use technology while moving, as opposed to portable computers, which are only practical for use while deployed in a stationary configuration.
Highlights:
Hottest area for research.
Developing at an astounding speed.
Lead to the evolution of various generations.
Examples:
Wearable computers
Smartphone etc.,
Evolution:
Continuous in amplitude and time
– Variations in the signal – disrupts over long distances
• Simplest type to wireless data
• Average between 4,800 to 9,600 bps (bits per second)
Speech Chat was the only service.
Uses FDMA (Frequency Division Multiple Access)
Solves fundamental problems like Roaming Across Domain, non-interrupted communication.
Disadvantages:
– High input fees for the 3G service licenses
– Great differences in the licensing terms
– Current high debt of many telecommunication companies, making it more of a challenge to build the necessary infrastructure for 3G.
Reasons for new research above 3G:
3G phones are expensive
• Lack of 2G mobile user buy-in for 3G wireless service
• Lack of coverage because it is still a new service
Open Wireless Architecture(OWA)
Provides common platform to complement different access technologies in an optimum way for different service requirements
Also called converged broadband wireless platform