A.1 Use case of P-CCPCH RSCP

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

P-CCPCH RSCP measurement reflects P-CCPCH of serving cell RSCP signal strength. From the distribution of this measurement during the period of measurement, the coverage quality of cell can be learned. Also it is helpful to do troubleshooting, such as locating coverage blind spot. Much more measurement values with small granularity are necessary to analyze coverage probability for specific area. Such as from ratio of the number of PCCPCH 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 the threshold may be higher for some cases with specific requirement. So that the coverage probability results can not be given from average, minimum and maximum of measurement value. So it is necessary to define P-CCPCH 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.