A method performed in a radio unit for handling Frequency Domain, FD, imaginary/quadrature, I/Q, data of each OFDM symbol in the frequency domain using one complex valued number per resource element, said FD I/Q data representing Physical Uplink Shared Channel, PUSCH, transmission of one or more User Equipments, UEs, , to a central control unit associated with the radio unit in a wireless communications network , which communications network comprises a switched Ethernet Common Public Radio Interface, eCPRI, front-haul network that uses Instant Uplink Access, IUA, wherein the central control unit is connected to several antenna sites and further connected to radio units including the radio unit through a front-haul switch , the method comprising: detecting an uplink transmission energy from the one or more UEs , deciding whether the detected uplink transmission energy from the respective one or more UEs is above or below a first threshold, - when it is decided that the detected uplink transmission energy from any of the one or more UEs is above the first threshold, sending the FD I/Q data representing those respective one or more UEs to the central control unit , and - when it is decided that the detected uplink transmission energy from any of the one or more UEs is below the first threshold, sending a message to the central control unit which message indicates that no FD I/Q data will be sent representing those respective one or more UEs , and refraining from sending the FD I/Q data representing those respective one or more UEs to the central control unit , wherein the uplink transmission from the respective one or more UEs is the Physical Uplink Shared Channel, PUSCH, transmission. detecting an uplink transmission energy from the one or more UEs , deciding whether the detected uplink transmission energy from the respective one or more UEs is above or below a first threshold, - when it is decided that the detected uplink transmission energy from any of the one or more UEs is above the first threshold, sending the FD I/Q data representing those respective one or more UEs to the central control unit , and - when it is decided that the detected uplink transmission energy from any of the one or more UEs is below the first threshold, sending a message to the central control unit which message indicates that no FD I/Q data will be sent representing those respective one or more UEs , and refraining from sending the FD I/Q data representing those respective one or more UEs to the central control unit , - when it is decided that the detected uplink transmission energy from any of the one or more UEs is above the first threshold, sending the FD I/Q data representing those respective one or more UEs to the central control unit , and - when it is decided that the detected uplink transmission energy from any of the one or more UEs is below the first threshold, sending a message to the central control unit which message indicates that no FD I/Q data will be sent representing those respective one or more UEs , and refraining from sending the FD I/Q data representing those respective one or more UEs to the central control unit , wherein the uplink transmission from the respective one or more UEs is the Physical Uplink Shared Channel, PUSCH, transmission. <EOS>