Future channel modelling needs in ITU recommendations

Fifth Generation fixed, and mobile radio networks targeted a wide range of frequencies from 24 GHz to 86 GHz to enable high data rates over different types of links which included indoor, outdoor, outdoor to indoor and in cluttered environments. Some of the new models to cover these frequency bands were incorporated in existing ITU Recommendations such as the indoor and outdoor models whereas new recommendations were introduced for the outdoor to indoor and the clutter loss models. Future generation radio networks are expected to operate at frequencies above 100 GHz in different scenarios. This paper presents an overview of the channel models that have recently been adopted in the ITU recommendations and the need for updates.