A method of transmitting data packets in an industrial wireless network of a process control system where an industrial process is controlled by a process control device based on process control data concerning process control properties, such as temperature and pressure, voltage and current, and collected using the industrial wireless network, the method being performed by a wireless communication device being a node (24, 26, 28, 30, 32, 34) in the industrial wireless network, and the method comprising the steps of: - investigating (78, 80) if there is more than one data packet with process control data representing the same process control property from the same data originating device destined for the process control device in a transmission queue, said data originating device being an interface to the process being controlled and configured to sense more than one process control property, - comparing the age of the data packets in the transmission queue with an age threshold, which age threshold has a value related to a control cycle of the process control device, - discarding data packets older than the age threshold, and - transmitting data packets in the transmission queue that are not older than the age threshold and - if there is more than one data packet with process control data representing the same process control property from the same data originating device destined for the process control device in the transmission queue, then further performing - comparing time stamps of the data packets, where a time stamp reflects the time of generation of a corresponding data packet, - keeping the newest data packet, and - discarding older data packets, so that only the most recent data packets from a data originating device are sent to the process control device from said wireless communication device. - investigating (78, 80) if there is more than one data packet with process control data representing the same process control property from the same data originating device destined for the process control device in a transmission queue, said data originating device being an interface to the process being controlled and configured to sense more than one process control property, - comparing the age of the data packets in the transmission queue with an age threshold, which age threshold has a value related to a control cycle of the process control device, - discarding data packets older than the age threshold, and - transmitting data packets in the transmission queue that are not older than the age threshold and - if there is more than one data packet with process control data representing the same process control property from the same data originating device destined for the process control device in the transmission queue, then further performing - comparing time stamps of the data packets, where a time stamp reflects the time of generation of a corresponding data packet, - keeping the newest data packet, and - discarding older data packets, so that only the most recent data packets from a data originating device are sent to the process control device from said wireless communication device. - comparing time stamps of the data packets, where a time stamp reflects the time of generation of a corresponding data packet, - keeping the newest data packet, and - discarding older data packets, so that only the most recent data packets from a data originating device are sent to the process control device from said wireless communication device.