18-09-2012, 12:40 PM
WiMAX
WiMAX.ppt (Size: 161 KB / Downloads: 23)
Introduction
Wireless Internet access nowadays has become ubiquitous in everyday lives.
Examples of wireless technologies includes, Wi-Fi (IEEE 802.11), Bluetooth, WiMAX, and more.
WiMax technology has the potential to deliver high-speed Internet access to rural areas and urban area not serviced by cable technology or the demand of mobile Internet is high.
WiMax also viewed as an alternative to satellite Internet services.
WiMAX may be a viable alternative for broadband access that has been economically unavailable.
WiMAX access was used to assist with communications in Aceh, Indonesia, after the tsunami in December 2004.
WiMAX
WiMAX (Worldwide Interoperability for Microwave Access).
provides wireless data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access
It is based on the IEEE 802.16 standard = WirelessMAN
IEEE 802.16
a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL.
The standard is called 802.16-2004
Advantages
Connects Wi-Fi hotspot area with each other and to the other parts of the Internet.
provides a wireless alternative to cable and Digital Subscriber Line (DSL)
High speed data transfer
Disadvantages
WiMax deployment for further Subscriber Stations (SS) from the Base Station (BS) requires Line of Sight (LOS) connectivity where there should not be any blockages of interference between SS and BS.
Weather and other environmental factors
It is difficult to achieve the maximum data rates unless the SS and BS are located on high places.
WiMAX is very power intensive technology and requires strong electrical support thus it is another turning point for mobile devices which heavily rely on batteries.
General Features of WiMAX:
OFDM-based physical layer: a scheme that offers good resistance to multipath, and allows WiMAX to operate in NLOS conditions
OFDM = Orthogonal Frequency Division Multiplexing
Very high peak data rates
Scalable bandwidth and data rate support
Link-layer retransmissions
Support for TDD and FDD
TDD: Time Division Duplexing
FDD: Frequency Division Duplexing
WiMAX.ppt (Size: 161 KB / Downloads: 23)
Introduction
Wireless Internet access nowadays has become ubiquitous in everyday lives.
Examples of wireless technologies includes, Wi-Fi (IEEE 802.11), Bluetooth, WiMAX, and more.
WiMax technology has the potential to deliver high-speed Internet access to rural areas and urban area not serviced by cable technology or the demand of mobile Internet is high.
WiMax also viewed as an alternative to satellite Internet services.
WiMAX may be a viable alternative for broadband access that has been economically unavailable.
WiMAX access was used to assist with communications in Aceh, Indonesia, after the tsunami in December 2004.
WiMAX
WiMAX (Worldwide Interoperability for Microwave Access).
provides wireless data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access
It is based on the IEEE 802.16 standard = WirelessMAN
IEEE 802.16
a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL.
The standard is called 802.16-2004
Advantages
Connects Wi-Fi hotspot area with each other and to the other parts of the Internet.
provides a wireless alternative to cable and Digital Subscriber Line (DSL)
High speed data transfer
Disadvantages
WiMax deployment for further Subscriber Stations (SS) from the Base Station (BS) requires Line of Sight (LOS) connectivity where there should not be any blockages of interference between SS and BS.
Weather and other environmental factors
It is difficult to achieve the maximum data rates unless the SS and BS are located on high places.
WiMAX is very power intensive technology and requires strong electrical support thus it is another turning point for mobile devices which heavily rely on batteries.
General Features of WiMAX:
OFDM-based physical layer: a scheme that offers good resistance to multipath, and allows WiMAX to operate in NLOS conditions
OFDM = Orthogonal Frequency Division Multiplexing
Very high peak data rates
Scalable bandwidth and data rate support
Link-layer retransmissions
Support for TDD and FDD
TDD: Time Division Duplexing
FDD: Frequency Division Duplexing