Abstract: A method of transmitting data from a first communication device to a second communication device, comprising receiving a first signal on a first frequency channel from the second communication device, generating data, wherein the data comprises a reception status indicating whether there is interference on the first frequency channel due to a second signal transmitted by a third communication device, transmitting a third signal on a second frequency channel to the second communication device, wherein the transmission is carried out for a predetermined duration, receiving a fourth signal on the second frequency channel from the second communication device; and transmitting the data generated on the second frequency channel to the second communication device.

Abstract: A method of determining whether a frequency channel is available for data transmission for a communication device is provided. The method provided comprises dynamically selecting a time interval for determining whether the frequency channel is available for data transmission for the communication device. The method provided further comprises determining whether the frequency channel is available for data transmission for the communication device, during the time interval selected.