Detecting neighbour cells to compile a neighbor cell list in an access point serving a small cell

An Access Point 105 serving a small cell 202 in a cellular communication system (100, figure 1) uses the User Equipment (UE) intra-frequency Primary Scrambling Code (PSC) detection mode to detect neighbours inter-frequency by switching its carrier frequency to a frequency on which it is desired to check for neighbours (for a period long enough and/or often enough for its UE to have a reasonable chance of detecting such a neighbour). Received measurements on such neighbour cells 202, 203 may be used to compile a neighbor cell list if no such list has been preconfigured in the Access Point or if network listen results have provided only a limited number of detected neighbour cells. The access point 105 is allocated a set of operating frequencies and selects an operating frequency in turn. Wireless communication unit 113 is instructed to send measurement reports of neighbour cells 202, 203 which are operating on the selected operating frequency. Neighbour cell measurements are repeated until all operating frequencies of the Access Point included in the set have been selected.