NR Measurement Objects for Beam-Aware Handover
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Solution Overview
Problem
In current New Radio (NR) handover scenarios, user equipment (UE) measurements based on synchronization signal blocks (SSBs) and channel state information reference signals (CSI-RS) may not accurately identify cells with favorable beams, leading to incomplete measurement reports and potential handover failures due to average beam quality thresholds.
Innovation Solution
The introduction of an SSB for timing cell ID parameter in the CSI-RS Cell Mobility information element allows the UE to include cells with favorable beams in measurement reports, even if they are not triggered, by configuring multiple measurement objects (MOs) on different bandwidth parts (BWPs) and using a specific SSB as a timing reference, enabling more comprehensive beam management and handover optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UE measurements are based on average beam quality thresholds, then measurement processing is simplified, but cells with favorable beams are not accurately identified
Solution Approach 1:
The patent segments the measurement process by introducing multiple measurement objects (MOs) configured on different bandwidth parts (BWPs). Each MO can be associated with specific SSBs, allowing the UE to perform measurements on different frequency resources separately. This segmentation enables identification of cells with favorable beams on specific BWPs without requiring complex processing across the entire frequency spectrum, thus improving measurement precision while managing device complexity.
Solution Approach 2:
The patent adds a frequency dimension to beam measurement by configuring multiple measurement objects on different bandwidth parts. Instead of measuring all beams across the entire frequency range simultaneously, the UE can measure beams on specific BWPs separately. This dimensional approach allows the network to identify cells with favorable beams on particular frequency resources, improving measurement accuracy without overwhelming the UE's processing capabilities.
2Adaptability or versatility
If multiple measurement objects are configured on different bandwidth parts, then beam management comprehensiveness is improved, but configuration complexity increases
Solution Approach 1:
The patent creates measurement objects that serve multiple functions: they can be used for mobility measurements, beam management, and frequency-specific optimizations. Each measurement object is configured with parameters including SSB associations and BWP specifications, allowing a single MO configuration to handle multiple measurement scenarios. This multi-functionality improves beam management comprehensiveness while reducing the need for separate configuration mechanisms for different measurement types.
Solution Approach 2:
The patent utilizes parameter changes within the measurement object configuration to achieve versatile beam management. By modifying parameters such as ssb-PositionsInBurst, frequencyOffset, and bwp-Id within MO configurations, the system can adapt to different beam management scenarios without creating entirely new configuration structures. This parameter-based flexibility allows comprehensive beam management across multiple BWPs while maintaining a unified configuration framework that manages complexity.
3Reliability
If cells with favorable beams are included in measurement reports even when not triggered, then handover accuracy is improved, but measurement report size increases
Solution Approach 1:
The patent applies local quality by allowing measurement reports to include cells with favorable beams on specific bandwidth parts even when those cells don't meet overall triggering criteria. The network can configure reporting thresholds and criteria that evaluate beam quality locally on individual BWPs rather than requiring average quality across all frequencies. This enables handover decisions based on local beam quality improvements while maintaining efficient report structures through selective reporting configurations.
Data Source
AI summary
Technology for a user equipment (UE) operable to perform measurements for measurement objects (MOs) in a New Radio (NR) system is disclosed. The UE can identify an MO configured by an NR network in the NR system, wherein the MO is associated with a synchronization signal block (SSB) of a frequency. The UE can measure the MO associated with the SSB for the frequency. The UE can encode a measurement report for transmission to the NR network, wherein the measurement report includes one or more measurements associated with the MO.