This Recommendation provides an architecture reference model of the IMT-2020 network. Following the reference model and the associated reference points@ procedures of the IMT-2020 network basic services [ITU-T Y.3102] are then specified. NOTE ?C This Recommendation addresses basic aspects of the architecture of the IMT-2020 network and it can be used as a foundation for further IMT-2020 studies. Detailed and comprehensive aspects [b-3GPP TS 23.501] [ b-3GPP TS 23.502] are not included.