FIELD: data processing.
SUBSTANCE: invention relates to network communication technologies. In a communication service server, in response to receiving (12) request (11) to establish a communication session with at least one UE from a plurality of UEs, adapted request (13) is provided, based on what intermediate response(s) and which final response(s) can be provided by the UE from the plurality of UEs in response to the communication session establishment request (11), adapted request is forwarded (14) to the communication network, and the receiving UE processes the adapted establishment or non-establishment request for communication session (15).
EFFECT: technical result is improved data transmission security.
24 cl, 8 dwg
