Transmission Opportunities

An apparatus comprising:

• at least one processor, and
• at least one non-transitory memory including computer program code,
• the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus to perform:
• configuring a first radio beam pair and at least a second radio beam pair to a communication connection, wherein the first radio beam pair comprises a first transmission radio beam having a first transmission direction and the second radio beam pair comprises a second transmission radio beam having a second transmission direction different from the first transmission direction;
• enabling simultaneous transmission of the first transmission radio beam and the second transmission radio beam;
• triggering channel contention to transmit at least one message and for performing radio channel sensing for both the first transmission radio beam and the second transmission radio beam during the channel contention;
• acquiring a transmission opportunity for the first radio transmission beam in response to the radio channel sensing detecting that a radio channel is available for the first transmission radio beam;
• and
• upon acquiring the transmission opportunity for the first transmission radio beam, continuing the channel contention for the at least second transmission radio beam while performing transmission of the at least one message with the first transmission radio beam;
• upon acquiring a transmission opportunity for the second transmission radio beam, transmitting the at least one message with first transmission radio beam and the second transmission radio beam.