10.6 Measurement Model

36.3003GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN)Overall descriptionRelease 17Stage 2TS

Figure 10.6-1: Measurement model

– A: measurements (samples) internal to the physical layer.

– Layer 1 filtering: internal layer 1 filtering of the inputs measured at point A. Exact filtering is implementation dependant. How the measurements are actually executed in the physical layer by an implementation (inputs A and Layer 1 filtering) in not constrained by the standard.

– B: A measurement reported by layer 1 to layer 3 after layer 1 filtering.

– Layer 3 filtering: Filtering performed on the measurements provided at point B. The behaviour of the Layer 3 filters are standardised and the configuration of the layer 3 filters is provided by RRC signalling. Filtering reporting period at C equals one measurement period at B.

– C: A measurement after processing in the layer 3 filter. The reporting rate is identical to the reporting rate at point B. This measurement is used as input for one or more evaluation of reporting criteria.

– Evaluation of reporting criteria: This checks whether actual measurement reporting is necessary at point D. The evaluation can be based on more than one flow of measurements at reference point C e.g. to compare between different measurements. This is illustrated by input C and C’. The UE shall evaluate the reporting criteria at least every time a new measurement result is reported at point C, C’. The reporting criteria are standardised and the configuration is provided by RRC signalling (UE measurements).

– D: Measurement report information (message) sent on the radio interface.

Layer 1 filtering will introduce a certain level of measurement averaging. How and when the UE exactly performs the required measurements will be implementation specific to the point that the output at B fulfils the performance requirements set in TS 36.133 [21]. Layer 3 filtering and parameters used is specified in TS 36.331 [16] and does not introduce any delay in the sample availability between B and C. Measurement at point C, C’ is the input used in the event evaluation.