Parameter
|
Wi-Fi
|
Wi-Max
|
Acronym for
|
Wireless Fidelity
|
World Interoperability for
Microwave Access
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Description
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It is a wireless technology that
allows any electronic device to exchange and transfer data wirelessly.
|
It a wireless technology which
delivers carrier class, high speed wireless broadband at low cost and
covering large distance than Wi-Fi.
|
IEEE Standard
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IEEE 802.11
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IEEE 802.16
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Implementation
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It is basically an implementation
of wireless Local Area Connection within a small building, a college, or an
institutional building.
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It is a wireless broadband
metropolitan technology whose objective is to interconnect houses, buildings,
or even hot spots to allow communication between them or with other networks.
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Cost
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Can be implemented by using low
cost access pints.
|
Wi-Max technology requires costly
infrastructure.
|
Frequency band
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2.4 GHz to 5 GHz
|
Licensed/Unlicensed 2 GHz to 11
GHz
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Channel Bandwidth
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Wi-Fi 802.11b= 25 MHz
Wi-Fi 802.11 a/g=20 MHz
|
Adjustable 1.25 M to 20
MHz
|
Full/Half Duplex
|
Half Duplex
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Full Duplex
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Radio Technology
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Wi-Fi 802.11b= Direct Sequence
Spread Spectrum
Wi-Fi 802.11 a/g= OFDM
(64-channels)
|
OFDM (256-channels)
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Bandwidth Efficiency
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Wi-Fi 802.11b= <=0.44 bps/Hz
Wi-Fi 802.11 a/g= <=2.7 bps/Hz
|
<=5 bps/Hz
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Modulation
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BPSK, QPSK, 16-, 64- QAM
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BPSK, QPSK, 16-, 64-,
256-QAM
|
Encryption
|
Optional- RC4 (AES in 802.11i)
|
Mandatory- 3DES Optional-
AES
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Mobility
|
In Development
|
Mobile Wi-MAX (802.16e)
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Mesh
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Vendor Proprietary
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Yes
|
Access Protocol
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CSMA/CA
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Request/Grant
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Coverage
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< 100 feet indoor
<1000 feet Outdoor
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Fixed Wi-Max=3-5 Miles
Mobile Wi-Max=<2 Miles
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Multiplexing
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CSMA
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TDD,FDD
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