A method for pre-emption of radio resources in a communication device (101a-1 - 101a-3, 101b-1, 101b-2), comprising: - a memory storing information indicating radio resources (221, 222, 223) on a channel of a wireless network reserved for a first class of data and for a second class of data, the radio resources (221, 222, 223) being shared between the communication device (101a-1 - 101a-3, 101b-1, 101b-2) and a further communication device (101a-1 - 101a-3, 101b-1, 101b-2), - at least one processor receiving, via a wireless interface, a control message (580, 581), the control message (580, 581) prospectively indicating a time-frequency resource block of the radio resources (221, 222, 223) and prompting the communication device (101a-1 - 101a-3, 101b-1, 101b-2) to mute transmission in the indicated time-frequency resource block on the channel, - the at least one processor retrieving the stored information from the memory, - the at least one processor controlling the wireless interface to mute transmission in the indicated time-frequency resource block on the channel in response to said receiving of the control message (580, 581), characterized in that the radio resources (221, 222, 223) comprise first radio resources on the channel reserved for the first class of data and further comprise second radio resources on the channel reserved for the second class of data, the first radio resources and the second radio resources being shared between the communication device (101a-1 - 101a-3, 101b-1, 101b-2) and the further communication device (101a-1 - 101a-3, 101b-1, 101b-2), the method further comprising: - the at least one processor selecting between the first radio resources and the second radio resources for sending of a data packet of the second class of data, said selecting depending on a traffic load on the channel in the second radio resources and further depending on the indicated time-frequency resource block of the first radio resources, - if the first radio resources are selected: the at least one processor sending, via the wireless interface on the channel, the data packet of the second class of data employing the first radio resources. - a memory storing information indicating radio resources (221, 222, 223) on a channel of a wireless network reserved for a first class of data and for a second class of data, the radio resources (221, 222, 223) being shared between the communication device (101a-1 - 101a-3, 101b-1, 101b-2) and a further communication device (101a-1 - 101a-3, 101b-1, 101b-2), - at least one processor receiving, via a wireless interface, a control message (580, 581), the control message (580, 581) prospectively indicating a time-frequency resource block of the radio resources (221, 222, 223) and prompting the communication device (101a-1 - 101a-3, 101b-1, 101b-2) to mute transmission in the indicated time-frequency resource block on the channel, - the at least one processor retrieving the stored information from the memory, - the at least one processor controlling the wireless interface to mute transmission in the indicated time-frequency resource block on the channel in response to said receiving of the control message (580, 581), characterized in that - the at least one processor selecting between the first radio resources and the second radio resources for sending of a data packet of the second class of data, said selecting depending on a traffic load on the channel in the second radio resources and further depending on the indicated time-frequency resource block of the first radio resources, - if the first radio resources are selected: the at least one processor sending, via the wireless interface on the channel, the data packet of the second class of data employing the first radio resources.