A communications node operable to communicate with another communications node over a communications channel having a plurality of frequency resources, the communications node includes data defining a division of the communications channel into S contiguous sub-bands each having N frequency resources, data defining an initial allocation of the frequency resources, a resource determination module operable to apply a frequency shift to the initially allocated frequency resources in accordance with a frequency hopping sequence to determine frequency resources to use for communicating information with the other communications node, the frequency shift corresponding to an integer multiple of the number N frequency resources in each sub-band, the integer multiple being an integer from the range zero to S, and a transceiver for communicating information with the other communications node using the determined frequency resource.