A method of determining communication resource availability within range of a user-centric mobile network is disclosed. In one embodiment the method comprises discovering communication resources within range of the user-centric mobile network, the communication resources including unique resource identifiers, and transmitting the unique resource identifiers and a user identifier to a server that is accessible from outside the user-centric mobile network. The communication resources may have associated therewith an available service and a current status and the method may further comprise transmitting available service information and current status information to the server. Also disclosed is a service discovery device for use in implementing the method.