The 5G Standard

RAN4 – Radio Performance and Protocol Aspects


Within the 3GPP Technical Specification Group Radio Access Network (TSG RAN), RAN WG4 (RAN4) is responsible for the following aspects. The group works on the Radio Frequency (RF) aspects of UTRAN/E-UTRAN/NR. RAN4 performs simulations and derives the minimum requirements for transmission and reception parameters, Radio Resource Management (RRM), and for channel demodulation and Channel State Information (CSI) reporting.

Once these requirements are set, the group defines the test procedures that will be used to verify them for BS, Repeater, Relay and Integrated Access Backhaul (IAB).

Requirements for other radio elements, like Repeaters, Relay, and IAB are specified in RAN4 as well. In addition, OTA requirements and testing methods for both BS and UE are defined in RAN4.

Terms of Reference

The latest terms of reference were approved at RAN#91-e in document RP-210786.