the mobile goes in the to RRC_INACTIVE state. 9.3. Measurement configuration In standby mode, the measurement configuration is broadcast by the gNb base station in the SIB 1 message (Broadcast Control Channel System Information Block 1). When switching to connected mode, the configuration of the measurements to be performed by the mobile is triggered by the gNB entity in the RRCReconfiguration, RRCResume messages. The information is stored in the MeasConfig measurement configuration and contains the following parameters: - the object that identifies the radio channel; - the event that triggers the measurement report: - the measurement format: the quantity of information to be returned to the base station and the associated information (e.g. several cells, several RATs); - the criteria that trigger the measurements (periodic or by event); - the combination of objects and events by measurement identity; - the quality of the configuration and, in particular, the filtering parameter; - the periodicity of measurements when no upward or downward communication is planned. Since the mobile does not generally have several radio receivers, the inter- frequency and inter-RAT measurement must be carried out in the intervals provided in the frame. The measurements made on the server cell and neighboring cells are used for cell selection and handover. Intra-frequency measurement, essential to ensure mobility, is configured during the radio connection. NG-RAN and 5G-NR Inter-frequency and inter-RAT (Radio Access Technology) measurement can also be configured during connection. The measurements made on the eNB master base station and the en-gNB secondary base station are used for dual connectivity. 9.3.1. Measurement objects The measurements carried out on the radioelectric channels of neighboring cells are of different types: - intra-frequency: the frequency of the neighboring cell is identical to that of the server cell; - inter-frequency: the frequency of the neighboring cell is different from the server cell; - inter-RAT E-U