ITU-T Q.5022 PDF

This Recommendation describes the procedure for device-to-device (D2D) communication based on energy efficient intra-cell clustering and the ability to reuse frequencies between intra-cell clusters. The aim of this procedure is to enable D2D communication in different conditions (normal mode and failure mode) in IMT-2020 network, including clustering in cell, switching between different modes, signalling for node discovery, and communication with neighbour cells.