03-01-2011, 11:52 AM
[attachment=7896]
Pramendra kumar
M.Tech ,
Digital communication
MANIT Bhopal
Content
Current Internet access technologies
Some Wireless Standards
Wimax
IEEE 802.16 standards
Fundamental technologies in Wimax
Relationship With Other Wireless Technologies
Wimax system part
Wimax access method
Usage Areas
Conclusion
Current Internet access technologies
Broadband
DSL
Cable
WiFi
Dial-up
Some Wireless Standards
Bluetooth
DECT (Digital Enhanced Cordless Telecommunications)
DSRC (Dedicated Short Range Communications)
HIPERLAN
HIPERMAN
IEEE 802.11
IrDA
RFID (Radio Frequency Identification)
WiFi
WiMAX
Wimax
Worldwide Interoperability for Microwave Access (WiMAX) is the common name associated to the IEEE 802.16a/e standards.
These standards are issued by the IEEE 802.16 subgroup that originally covered the Wireless Local Loop technologies with radio spectrum from 10 to 66 GHz.
Faster than broadband service
70 megabits per second
Much wider coverage than WiFi
30-mile radius from base station
Line-of-sight not needed between user and base station
IEEE 802.16 standards
802.16.1 (10-66 GHz, line-of-sight, up to 134Mbit/s)
802.16.2 (minimizing interference between coexisting WMANs)
802.16a (2-11 Ghz, Mesh, non-line-of-sight)
802.16b (5-6 Ghz)
802.16c (detailed system profiles)
802.16d (fixed wirelessMAN)
P802.16e (Mobile Wireless MAN)
Fundamental technologies in Wimax
OFDMA
SUPPORT FOR SMART ANTENA
ADAPTIVE MODULATION
FDD AND TDD
WiMAX access method
An Internet service provider sets up a WiMAX base station.
You would buy a WiMAX-enabled computer or upgrade your old computer to add WiMAX capability.
You would receive a special encryption code that would give you access to the base station.
The base station would beam data from the Internet to your computer
If you have a home network, the WiMAX base station would send data to a WiMAX-enabled router, which would then send the data to the different computers on your network
