A.64 Monitoring of RF performance

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

Monitoring of the quality of RF signal in the cell is useful for the purpose of network planning and network optimization.

In case the L1-RSRP report function is enabled, measurements of RSRP per beam reported by UEs is a useful metric reflecting RF signal strength. In 5G NR, gNB cells transmit many narrow beams targeting UEs in the cell that result in better link budget and lower interference. However, some areas between beams of neighbouring NR cells , or between the NR cell and the neighbor E-UTRA cell may experience poor coverage or coverage holes. Therefore, it is necessary to optimize the beam coverage by coordinating the beam management function across multiple neighboring NR cells.

The Absolute Timing Advance reflects the distance of the UE from the cell antenna. The distribution of Absolute Timing Advance reflects UE distribution in the NR cell, thus it is helpful for analyzing the coverage and the capacity.