Average Filter for 5G RSRP Beam Tracking Bump
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Solution Overview
Problem
In 5G networks, the beam tracking bump causes significant variations in RSRP measurements, making it challenging for user equipment (UE) to accurately discover neighboring cells and perform handovers, especially at high speeds.
Innovation Solution
Introducing an additional average filter at the L1 and L3 filtering stages to smooth out RSRP measurements across multiple TRP and UE beams, using formulas like Equation 1 to update filtered measurement results, which helps in reducing the beam tracking bump and stabilizing RSRP readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam-based layer 1/3 filtering is applied for measurements in 5G networks, then measurement processing capability is improved, but measurement precision deteriorates due to beam tracking bump causing significant variations in RSRP measurements
Solution Approach 1:
The patent segments the filtering process into multiple stages: physical layer filtering (layer 1) and higher layer filtering (layer 3). By dividing the measurement processing into these distinct segments, each layer can apply appropriate filtering techniques - layer 1 handles immediate beam measurements while layer 3 performs additional smoothing, thereby reducing the beam tracking bump effect and improving overall measurement precision without sacrificing processing capability
Solution Approach 2:
The patent introduces an intermediary averaging process between layer 1 and layer 3 filtering. This intermediary stage computes average RSRP values across multiple beams and time instances, acting as a buffer that smooths out the beam tracking variations before the final layer 3 filtering is applied, thus resolving the contradiction between processing capability and measurement accuracy
2Stability of the object's composition
If additional average filtering is applied to smooth RSRP measurements, then measurement stability is improved, but device complexity increases due to additional filtering stages
Solution Approach 1:
The patent implements dynamic filtering where the filtering parameters and intensity are adapted based on the detected beam tracking bump characteristics. When beam tracking variations are detected, the averaging window and filtering coefficients are adjusted dynamically, providing enhanced stability when needed while maintaining simpler processing during stable conditions, thus balancing stability improvement with complexity management
Data Source
Figure 1A~1B
Figure 2
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AI summary
Embodiments of filtering for measurements in 5G networks generally described herein. In some embodiments, a user equipment (UE) reads, from the memory, reference signal received power (RSRP) and transmission reception point (TRP) measurements. The UE applies layer 1 filtering to the RSRP measurements. The UE applies, using a layer 3 filter, layer 3 filtering to the layer 1 filtered RSRP measurements, a configuration of the layer 3 filter being provided via radio resource control (RRC) signaling. The UE applies an average filter to the RSRP measurements, the average filter being applied either before, during or after the layer 3 filter. The UE computes reporting criteria values for the layer 3 filtered RSRP measurements to generate a measurement report. The UE encodes for transmission of the generated measurement report to an evolved NodeB (eNB) via a radio interface.