A method, apparatus, and computer program for protecting transmissions are provided. A wireless communication apparatus receives a physical layer convergence protocol header of a transmission on a frequency band and determines from header information included in the header, whether or not there are further transmissions associated with the transmission and after the transmission on the frequency band. In response to determining on the basis of the header information that there will be at least one other transmission after the transmission on the frequency band, channel access of the wireless communication apparatus is suspended on the frequency band for a determined time period after the transmission, the determined time period including a transmission time interval of the at least one other transmission.