gation condi- tions for the radio transmissions in different test environments. The channel models need to cover all required test environments and usage scenarios where the 5G networks are going to be deployed. Several test environments related to the main use cases of 5G (i.e., eMBB, mMTC, URLLC) have been defined where the candidate 5G radio access technologies will be evalu- ated, which include the following [32]: Indoor Hotspot-eMBB test environment represents an isolated indoor environment with very high user density, which is typically found at office buildings and/or in shopping malls populated by stationary and pedestrian users. This scenario is characterized by small coverage areas per site or TRP, high user throughput, high user density, and con- sistent user experience in an indoor environment. The typical radial coverage in this environment is less than 10 m. Dense Urban-eMBB test environment exemplifies an urban environment with high user density and large amount of user traffic where pedestrians and users in vehicles are COV- ered in an outdoor and outdoor-to-indoor setting. This interference-limited scenario mainly focuses on overlaying macro-TRPs with or without micro-TRPs, which is typi- cally found in city centers and dense urban areas. The radial coverage in this environ- ment is typically less than 100 m. Rural-eMBB test environment represents a rural environment with larger and continuous wide-area coverage, supporting pedestrian, vehicular, and high-speed vehicular users. The main feature of this scenario is unspotted wide-area coverage supporting high- speed vehicles. This scenario is noise-limited and/or interference-limited and uses a setup comprising macro-TRPs. The radial coverage in this environment is typically less than 2500 m. Introduction and Background Ixi Urban Macro-mMTC test environment characterizes an urban macro environment with blanket coverage over a large cell serving a large number of connected (machine-type) devices. The key characteristics of this interference-limited