Devices and methods arranged to support user communication device grouping in a communication network

The present disclosure relates to user communication devices and communication network devices , both arranged to support grouping of user communication devices in a communication network . One example user communication device determines a neighbor user communication device set comprising the user communication device and neighbor user communication devices , and determines , by communi cating with the neighbor user communication devices of the neighbor user communication device set via D2D commu nication , a user communication device group that the user communication device joins . The communication network device receives information on a plurality of user commu nication device groups , determined by user communication devices in the communication network , and executes clus tering on the plurality of user communication device groups .