Category 4 (CAT4) listen-before-transmit (LBT) operations for wireless communications

An apparatus for wireless communication, the apparatus comprising:

• a memory;
• and
• one or more processors coupled to the memory and configured to:
• receive a category two (Cat2) configuration message indicating whether Cat2 listen-before-talk (LBT) operations are enabled or disabled for the apparatus;
• in accordance with the Cat2 configuration message indicating that the Cat2 LBT operations are disabled for the apparatus, determine a value of a counter associated with a category four (Cat4) LBT operation;
• after determining the value of the counter and during a deferral interval associated with the Cat4 LBT operation, perform a first measurement of a first duration to determine a first energy value;
• based on the first energy value and during a contention interval associated with the Cat4 LBT operation following the deferral interval, perform a second measurement of a second duration to determine a second energy value, the second duration different than the first duration;
• and
• determine whether to adjust the value of the counter based on the second energy value.

A method of wireless communication performed by a communication device, the method comprising:

• receiving a category two (Cat2) configuration message indicating whether Cat2 listen-before-talk (LBT) operations are enabled or disabled for the communication device;
• in accordance with the Cat2 configuration message indicating that the Cat2 LBT operations are disabled for the communication device, determining a value of a counter associated with a category four (Cat4) LBT operation;
• after a deferral interval associated with the Cat4 LBT operation and during a contention interval associated with the Cat4 LBT operation, performing a measurement of a particular duration to determine an energy value, the particular duration in accordance with a processing time associated with the communication device;
• and
• determining whether to adjust the value of the counter based on the energy value.

A method of wireless communication performed by a communication device, the method comprising:

• receiving a category two (Cat2) configuration message indicating whether Cat2 listen-before-talk (LBT) operations are enabled or disabled for the communication device;
• in accordance with the Cat2 configuration message indicating that the Cat2 LBT operations are disabled for the communication device, determining a value of a counter associated with a category four (Cat4) LBT operation;
• after determining the value of the counter and during a deferral interval associated with the Cat4 LBT operation, performing a first measurement of a first duration to determine a first energy value;
• based on the first energy value and during a contention interval associated with the Cat4 LBT operation following the deferral interval, performing a second measurement of a second duration to determine a second energy value, the second duration different than the first duration;
• and
• determining whether to adjust the value of the counter based on the second energy value.