Clear channel assessment technique

A non-transitory computer readable recording medium storing a computer program product for controlling a computing device for performing a clear channel assessment (CCA) in an unlicensed radio frequency (RF) spectrum for transmitting data according to a first radio access technology (RAT) in coexistence with a second RAT, the computer program product comprising software instructions which, when run on processing circuitry of the computing device, causes the computing device to:

• receive signals in the unlicensed RF spectrum;
• process the received signals according to an operating state, wherein the processing in a first operating state causes a first delay that is greater than a second delay caused by the processing in a second operating state, the operating state depending on the presence of data to be transmitted according to the first RAT in the unlicensed RF spectrum;
• and
• perform the CCA based on the processed signals.

A device for performing a clear channel assessment (CCA) in an unlicensed radio frequency (RF) spectrum for transmitting data according to a first radio access technology (RAT) in coexistence with a second RAT, the device comprising:

• one or more interfaces;
• processing circuitry coupled to the one or more interfaces for signal exchange;
• and
• memory containing instructions executable by the processing circuitry whereby the device is operative to:
• receive signals in the unlicensed RF spectrum;
• process the received signals according to an operating state, wherein the processing in a first operating state causes a first delay that is greater than a second delay caused by the processing in a second operating state, the operating state depending on the presence of data to be transmitted according to the first RAT in the unlicensed RF spectrum;
• and
• perform the CCA based on the processed signals.