Beam Group Measurement Report Triggering in 5G NR
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Solution Overview
Problem
In wireless communication networks, particularly in 5G New Radio (NR), handover decisions based on individual active mode measurement signals (MRSs) can lead to ping-pong effects between different network nodes due to high granularity of per-beam information, resulting in unnecessary handovers and increased processing and signaling burdens on wireless devices.
Innovation Solution
Implementing a method where wireless devices are configured to trigger reports based on groups of beams, combining measurements into a single triggering condition, thereby reducing processing and signaling requirements and allowing for group-based evaluations, which helps mitigate the issues caused by high granularity in individual beam-based events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If handover decisions are based on individual active mode MRS measurements with high granularity, then measurement precision is improved, but device complexity and processing load increase
Solution Approach 1:
The patent segments the beam measurement process into two levels: individual beam measurement for precision and beam group evaluation for decision-making. The wireless device measures individual active mode MRS per beam, but the network configures beam groups and makes handover decisions based on aggregated group performance rather than individual beam fluctuations.
Solution Approach 2:
The patent merges multiple individual beam measurements into beam group evaluations. By combining measurements from multiple beams within a group, the system achieves both precise individual measurements and reduced overall complexity through aggregated decision-making at the network side.
2Measurement precision
If handover decisions are based on individual active mode MRS measurements, then measurement precision is improved, but ping-pong handovers increase
Solution Approach 1:
The patent combines multiple beam measurements into beam group evaluations to smooth out transient fluctuations. By assessing the collective performance of beams within a group rather than individual beam variations, the system reduces ping-pong handovers while preserving measurement precision through the underlying individual beam measurements.
Solution Approach 2:
The network performs preliminary configuration of beam groups before handover decisions are made. This preliminary structuring allows the system to evaluate multiple beams collectively, preventing premature handovers triggered by temporary individual beam conditions and improving handover stability.
3Measurement precision
If per-beam measurement reporting is implemented, then measurement precision is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts the handover decision-making function from the wireless device and places it at the network side. The device performs precise individual beam measurements but reports only beam group-level information or allows network-side evaluation, removing the burden of individual beam reporting from the device and reducing signaling overhead.
Solution Approach 2:
The patent merges multiple individual beam reporting requirements into single beam group evaluation reports. By combining the measurement and evaluation functions at the network side for beam groups, the system maintains precise individual measurements while significantly reducing the quantity of reported information and associated signaling overhead.
Data Source
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AI summary
A method (800) comprises obtaining (703, 804) a measurement configuration, the measurement configuration defining one or more beam groups (405A-C) and a report triggering configuration, wherein: each of the one or more beam groups (405) comprises one or more beams; and the report triggering configuration defines one or more conditions that trigger a measurement report by the wireless device. The method comprises performing (808) one or more measurements on the associated reference signal of each beam of the one or more beams included in each of the one or more beam groups, and filtering (812) the performed one or more measurements to obtain a filtered measurement value for each of the one or more beam groups. The method comprises determining (816), based on at least one filtered measurement value, whether at least one of the one or more conditions that trigger a measurement report by the wireless device are satisfied.