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Rayengine
Joined: 18 May 2001
Posts: 314
Helped: 3
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 06 Oct 2002 10:11 What is IEEE 802.11a,b and e? |
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As we know that the WLAN specification is IEEE 802.11, but can some tell me that the difference between them
(1) IEEE 802.11a
(2) IEEE 802.11b
(3) IEEE 802.11e
Rgs
Rayengine
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flatulent
Joined: 19 Jul 2002
Posts: 4856
Helped: 292
Location: Middle Earth
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| 06 Oct 2002 15:51 some guesses |
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| a is the 5 GHZ band direct spread modulation. b is the 2.4 GHz band direct spread modulation. The other may be frequency hopping or IR.
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flatulent
Joined: 19 Jul 2002
Posts: 4856
Helped: 292
Location: Middle Earth
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| 28 Nov 2002 16:33 correction to last message |
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| E is probably OFDM in the 5 GHz band set aside for data transmission.
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Darkseed
Joined: 30 Nov 2002
Posts: 53
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| 15 Dec 2002 11:03 |
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Quoting IEEE sources:
"The purpose of Task Group E is to: Enhance the current 802.11 MAC to expand support for applications with Quality of Service requirements, and in the capabilities and efficiency of the protocol."
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eda_wiz
Joined: 07 Nov 2001
Posts: 718
Helped: 30
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| 16 Dec 2002 10:40 |
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hi there ,
in a and b ieee specifies the physical layer , while in e the changes are in mac layer . and can use a physical layer with a or b spec..
a gives more importance to data rate --54mbps
b has only 11mbps , popular soho choice.
e is used for QoS needed networks with applications like real time multimedia streaming and all.
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radix
Joined: 23 Jul 2002
Posts: 108
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| 17 Dec 2002 21:42 free 802 standards available |
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Rayengine,
Just in case you weren't aware of this, all of the 802 standards can be d/l'ed for free from the IEEE at:
http://standards.ieee.org/getieee802
Regards,
Radix
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