Switching between channel access procedures that include and exclude receiving before transmitting

An apparatus, comprising:

• a processor configured to implement a method, the processor configured to:
• receive, by a first network node from a second network node, a message specifying a first channel access procedure to be used by the first network node after being powered up;
• and
• switch, by the first network node, to a second channel access procedure after the first channel access procedure upon satisfying a condition, wherein in response to the condition being not satisfied, the first network node continues to use the first channel access procedure;
• wherein the first channel access procedure excludes an LBT process and the second channel access procedure includes the LBT process;
• wherein the condition is satisfied after a contention window adjustment procedure is performed in response to a contention window (CW) value being set to a value greater than CW2 and CW2 is a minimum value in a set of allowed CW values, or the CW value being set to another value greater than or equal to CW2 and CW2 is a maximum value in the set of allowed CW values or another value in the set of allowed CW values between the minimum value and the maximum value;
• or
• wherein the condition is not satisfied in response to a contention window (CW) value being a minimum value CW1 or less according to a contention window adjustment procedure for a duration D2 or D3 and is satisfied in response to the CW value increasing to CW2 or more according to the CW adjustment procedure for a duration D3 for a first time.