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Hi Guys,

I captured a 802.11g Beacon and down below is the info

Capability info:
------------------

Short preamble - 0
Short slottime - 9 Ms


Erp info:
---------

Barker preamble = 0
Non-ERP =0 .

I got confused with the trace .

As of i know 802.11g can use short slot time only when short preambles are used and no 802.11b clients are associated to it.

As per the capabilty information -Long Preamble is used
As per the ERP element - Barker mode set to 0
[Non Erp can use short preamble if
present]

My doubt is all about the short slot time.
How can a AP use Short slot time in this Scenario.

Please help me guys

Best Regards,
S.Senthilraj

I have few more doubts reg this Barker mode in ERP and Short Preamble option in Capablility info.


Scenario 1
-------------------
Barker mode = 1
Short preamble = 0
Non-Erp = Not present

Result : No Short preambles allowed [Understood]


Scenario 2
.................
Barker mode = 1
Short preamble = 1
Non-Erp = Not present


Result : No Short preambles allowed [Understood]

Scenario 3
.................
Barker mode = 0
Short preamble = 1
Non-Erp = Not present


Result : Short preambles allowed [Understood]


Scenario 4
.................
Barker mode = 0
Short preamble = 0
Non-Erp = Not present

Result : ..............................................................

Is the result still No short preambles are allowed.
Am i right.


Some one help me out with scenario four.
Also validate the results for the three scenarios.

Best Regards,

S.Senthilraj