What is IEEE 802.11a,b and e?

[Rayengine]

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

 

[flatulent]

some guesses

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.

 

[flatulent]

correction to last message

E is probably OFDM in the 5 GHz band set aside for data transmission.

 

[Darkseed]

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."

 

[eda_wiz]

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.

 

[radix]

free 802 standards available

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:

https://standards.ieee.org/getieee802

Regards,
Radix