A master-slave system for communication over an ultra-wideband radio connection is proposed. The master-slave system comprises at least one slave device and one master device, wherein the slave device and the master device are configured to communicate over the ultra-wideband radio connection. The master device is configured to generate and transmit a request message to the slave device over a first channel of the ultra-wideband radio connection. The slave device is configured to receive the request message over the first channel of the ultra-wideband radio connection, generate at least one response message based on the request message, and transmit the at least one response message to the master device over the first channel of the ultra-wideband radio connection, and the master device is configured to receive the at least one response message. Further, the master device is configured to classify the first channel of the ultra-wideband radio connection as suitable or unsuitable for data transmission based on the at least one received response message and to transmit further messages on the first channel of the ultra-wideband radio connection or to change to another channel of the ultra-wideband radio connection based on the classification.