question about channel switching delay

[YAN HE]

Hi, Hong Zhang,

I used gettimeofday() to get the time before channel switching and the time after channel swtiching. The delay is calculated as the difference of those two times.

Thanks,
YAN

----- Original Message ----- 
From: "hong zhang" <henryzhang62 at yahoo.com>
To: "YAN HE" <yanhe at louisiana.edu>; <hostap at shmoo.com>
Sent: Friday, August 03, 2007 12:13 PM
Subject: Re: question about channel switching delay


> How do you determine delay time?
> Do you use iwevent?
> 
> ----henry
> 
> --- YAN HE <yanhe at louisiana.edu> wrote:
> 
>> Hello,everybody,
>> 
>> I am using hostap driver 0.4.9 for a Netgear MA401
>> card on Linux 2.6.11. The card was in Managed mode
>> and connected to an access point first. When I
>> changed either essid or mode by invoking ioctl() in
>> my program, the delay is 12 ms. However, if I
>> changed both essid and mode, the delay is 33 ms,
>> which is more than the sum of two separate delays.
>> Does anyone meet this before?
>> 
>> Thanks.
>> YAN
>> 
>> 
>>  > _______________________________________________
>> HostAP mailing list
>> HostAP at shmoo.com
>> http://lists.shmoo.com/mailman/listinfo/hostap
>> 
> 
> 
> 
>       
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