![]() In RRC_IDLE and RRC_INACTIVE, the UE can also do cell reselection. With respect to RRC states, what measurements are done by a 5G UE?Īn essential UE procedure in RRC_IDLE is cell selection.What are some acronyms pertaining to 5G UE measurements?įor convenience we use these acronyms related to measurements in this article: Channel State Information ( CSI), Demodulation Reference Signal (DMRS), Reference Signal ( RS), Reference Signal Received Power ( RSRP), Reference Signal Received Power per Branch (RSRPB), Reference Signal Received Quality ( RSRQ), Received Signal Strength Indicator ( RSSI), Signal-to-Noise and Interference Ratio (SINR), Synchronization Signal ( SS) and Synchronization Signal Block ( SSB).While UE measures many different signals, the main ones are based on SSB and CSI- RS. Some measurements are reported by Layer 1 directly to the network. If filtered measurements meet reporting criteria, they're reported to the network. RRC does filtering on Layer 1 measurements. Most measurements are executed by Layer 1, although some may be at Layer 2. However, it's possible for a UE to measure uplink signals sent by other UEs. Typically, a UE measures downlink signals while network measures uplink signals. Measurements are done by both UE and the network, although this article focuses only on measurements performed by a 5G UE. Measurements help the UE and the network make decisions so that resources are managed better and ultimately quality of service is achieved. Measurements are essential to determine the health of any cellular system given the current configuration. ![]()
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