[ath9k-devel] Channel busy cycles

[Ali Abedi <a2abedi@uwaterloo.ca>]

Thanks for the answer.
In this experiment we got 0% frame loss, so is your reasoning is still 
valid for this case? And why it is almost constant? I thought maybe RX 
is not counted for OFDM signal extension or OFDM preamble? Does that 
make any sense at all?

Thanks,
Ali


On 10/27/2012 7:42 PM, Adrian Chadd wrote:
> Hi,
>
> Sometimes your TX isn't decoded, and is counted as noise. Hence not
> showing up as RX.
>
> RX is only 'frames the PHY RXed'. "busy" is "time the PHY reported the
> signal level was high enough to consider the air busy, and thus not
> available for transmitting."
>
>
>
> Adrian
>
> On 27 October 2012 12:24, Ali Abedi <a2abedi@uwaterloo.ca> wrote:
>> Hello,
>>
>> I record the 4 registers showing tx, rx, busy, and total cycles. In a
>> clean environment (checked with a spectrum analyzer) I expected to see
>> busy = tx + rx. however, we have found that actually busy = tx + rx +
>> constant. where this constant is rate dependent. For example for 54
>> Mbps, the constant is about 1000 cycles. I have to note that this is an
>> 802.11g setup. Any explanation is appreciated.
>>
>> Best,
>> Ali
>>
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