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Date: Thu, 05 Jun 2014 14:27:17 +0530
From: Gaurav Kumar Chauhan <ck.gaurav@globaledgesoft.com>
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To: linux-wireless@vger.kernel.org
Subject: Physical carrier sensing (CCA)
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Hi,

I am working on measuring channel load which requires knowledge of 
carrier sensing.

I am comfortable with virtual carrier sensing but not with physical 
carrier sensing.
I tried to google it but didn't get more than basics. I want to know 
about physical carrier
sensing in detail and where code for physical sensing is present.

Is it in driver or in firmware?
I am using atheros pci-express card and ath9k driver.

Please help me. Thanks in advance.

Regards,
Gaurav