Detection of potential for network controlled d2d communication prior to activation of cellular bearers

An apparatus, comprising:

• an obtaining unit configured to obtain cellular radio access network information of an originating mobile device from a received session establishment message of session initiation signaling of cellular data communication;
• a comparing unit configured to compare the obtained cellular radio access network information of the originating mobile device to acquired cellular radio access network information of a terminating mobile device;
• and
• a detecting unit configured to detect, based on the comparison, whether the proximity between the originating mobile device and the terminating mobile device suffices to allow local cellular device-to-device data communication between the originating mobile device and the terminating mobile device.

A computer program stored on a computer-readable medium and comprising code adapted to cause the following when executed on a data-processing system:

• obtaining cellular radio access network information of an originating mobile device from a received session establishment message of session initiation signaling of cellular data communication;
• comparing the obtained cellular radio access network information of the originating mobile device to acquired cellular radio access network information of a terminating mobile device;
• and
• detecting, based on the comparison, whether the proximity between the originating mobile device and the terminating mobile device suffices to allow local cellular device-to-device data communication between the originating mobile device and the terminating mobile device.