A.2 Use case of UTRAN RSCP

32.4053GPPPerformance Management (PM)Performance measurementsRelease 17Telecommunication managementTSUniversal Terrestrial Radio Access Network (UTRAN)

UTRAN RSCP measurement together with UE P-CCPCH RSCP is helpful to analyze coverage probability and coverage balance of uplink and downlink. Much more measurement values with small granularity are need to analyze coverage probability for specific area, such as from ratio of the number of UTRAN RSCP that is larger than or equal to threshold to the total number of it, coverage probability could be learned. Threshold value is configurable according to the cases to be analyzed, such as, -95dBm for macro cell cases, -80dBm for micro or indoor cell cases, also threshold may be higher for some cases with specific requirement. Since the coverage probability results can not be given from average, minimum and maximum of measurement value, it is necessary to define UTRAN RSCP measurement.

According to optimization experience, several granularity of this measurement is proposed. Since the receiver sensitivity is nearly -110dBm (TDD mode), so that it is no meaning to collect the measurement value lower than it. For -110 dBm  RSCP < -100dBm, signal strength is week, it is useful to do trouble shooting, so the granularity is 1dB. For RSCP is larger than -100dBm, signal strength can be used to analysis balance of uplink and downlink, it is no need too accurately, so the granularity is 3dB.