CSI-RS (Channel State Information - Reference Signal): It is used for tracking rapidly changing channel conditions to support mobility and beam management.

SSB measurements are used to determine path loss and average channel quality.

SSB (Synchronization Signal Block): It is transmitted with a low duty cycle on a limited bandwidth as compared to LTE’s Cell-specific Reference signals (CRS) that are sent on the entire channel bandwidth.

The UE measures many different signals, the main ones are based on the SSB and CSI-RS.įor downlink channel sounding, 5G NR uses two main downlink signals that a UE measures: Some measurements are reported by layer 1 directly to the network.

If the filtered measurements meet reporting criteria, they are reported to the network. RRC does filtering on layer 1 measurements. Most measurements are executed by Layer 1, although some are at layer 2. RRC (Radio Resource Control) manages measurement configurations. It is possible for a UE to measure uplink signals sent by other UE’s. A UE measures downlink signals while a network measures uplink signals. Measurements are done by the UE and the Network. Measurements help the UE and the network make decisions so that the resources are managed better and with this, the quality of service is achieved. Measurements are essential to determine the health of any cellular system given the current configuration. Home > Technical Articles > 5G MR Measurement Events

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