Forum

Capability validation in 802.11g

1 posts by 1 authors in: Forums > Wi-Fi Alliance Certifications & the 802.11 Standard
Last Post: September 17, 2006:

By MuraliMohan September 17, 2006

Reply

Hi,
Iam very happy to see so many responses.But i still could not understand the behaviour of devices like Cisco.

When a long only station(11b) associates to Cisco AP which is short preamble capable, it should signal all the stations in the AP to use long preamble.Otherwise if any station sends any frame in short preamble the long only station cannot decode the NAV. So, How does the AP signal to all the stations to use long preamble only ? The only way it can do is to reset or unset the the preamble capability bit in beacon and tell all the stations to use only long preambles (for 11b stations).

But in devices like Cisco or D-Link this does not happen ? The preamble capability bit is still set in the beacon regardless of the preamble the network/BSS is currently using.What does this behaviour mean?

Please clarify my doubt with paitience ....!

With regards,
Murali

Page 1 of 1

1

Success Stories

I literally just came out of the testing centre having taken the CWDP exam. The certification process opened my mind to different techniques and solutions. This knowledge can only broaden your perspective. Great job, CWNP, you have a great thing going on here.
-Darren

Working through the CWNP coursework and certifications helped not only to deepen my technical knowledge and understanding, but also it boosted my confidence. The hard work it took to earn my CWNE has been rewarding in so many ways.
-Ben

I want to commend you and all at CWNP for having a great organization. You really 'raise the bar' on knowing Wi-Fi well. I have learned a ton of information that is helping my job experience and personal career goals, because of my CWAP/CWDP/CWSP studies. Kudos to all at CWNP.
-Glenn