This beneficially allows the network to take action to mitigate against potential interference to other devices operating within the cellular network (such as mobile telephone 3-3 or the base station 5) that might arise due to the D2D transmission between the mobile telephones 3.

Specifically, in this example, the base station 5 receiving the indication that the mobile telephone 3 is involved in a D2D service evaluates the received information and determines whether or not the indicated D2D service is to be maintained or another communication technology (e.g. an LTE cellular based technology) is to be used instead. The base station 5 (or another network entity, such as the MME 9) may check, for example, whether the interference caused by the indicated D2D service is below a predetermined threshold, whether the parameters used in the D2D service comply with the applicable network policies, whether communication between the mobile telephone 3 and the other communication node can or should be provided in any way other than a D2D service, etc.

If the on-going D2D service is authorised, the base station 5 sends an RRC response message to the mobile telephone 3, informing the mobile telephone 3 that it can continue its D2D transmissions. Besides the authorisation indication, the base station 5 might also include in this RRC message additional control parameters in order to instruct the mobile telephone 3 to adjust its D2D operation to avoid or eliminate interference, if necessary.