Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

What is IEEE 802.11a,b and e?

Status
Not open for further replies.

Rayengine

Full Member level 5
Joined
May 18, 2001
Messages
287
Helped
3
Reputation
6
Reaction score
3
Trophy points
1,298
Location
Hong Kong
Activity points
1,737
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

Advanced Member level 5
Joined
Jul 19, 2002
Messages
4,629
Helped
489
Reputation
980
Reaction score
150
Trophy points
1,343
Location
Middle Earth
Activity points
46,689
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

Advanced Member level 5
Joined
Jul 19, 2002
Messages
4,629
Helped
489
Reputation
980
Reaction score
150
Trophy points
1,343
Location
Middle Earth
Activity points
46,689
correction to last message

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

Darkseed

Member level 2
Joined
Nov 30, 2002
Messages
50
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
410
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

Advanced Member level 2
Joined
Nov 7, 2001
Messages
654
Helped
57
Reputation
114
Reaction score
29
Trophy points
1,308
Activity points
6,195
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

Full Member level 3
Joined
Jul 23, 2002
Messages
156
Helped
7
Reputation
14
Reaction score
1
Trophy points
1,298
Activity points
1,536
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:

http://standards.ieee.org/getieee802

Regards,
Radix
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top