Measurement Report Invalidation for Wireless Beam Management
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Solution Overview
Problem
Wireless communication systems face challenges in beam management due to the use of stale measurement reports, which can lead to suboptimal beam selection and performance degradation due to rapidly changing channel conditions.
Innovation Solution
A user equipment (UE) is configured to update or invalidate previously transmitted measurement reports by transmitting an invalidation message to the network entity when subsequent measurements differ from the initial measurements, allowing for revalidation or rearrangement of reference signals in the measurement report.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement reports are transmitted frequently to ensure current beam selection, then beam management reliability is improved, but signaling overhead and power consumption increase
Solution Approach 1:
The patent implements a feedback mechanism where the network entity validates measurement reports and provides feedback to the UE. The network entity determines whether to validate or invalidate measurement reports based on current channel conditions, and this validation status is fed back to the UE to control subsequent reporting behavior, optimizing the balance between reliability and power consumption
Solution Approach 2:
The measurement reporting system is made dynamic through the validation mechanism. Instead of fixed periodic reporting, the system adapts the reporting frequency and timing based on validation outcomes and channel condition changes. The UE can be triggered to update reports dynamically when invalidation occurs or when validation indicates reports are still current
2Reliability
If measurement reports are transmitted frequently to ensure current beam selection, then beam management reliability is improved, but signaling overhead increases
Solution Approach 1:
The network entity provides validation feedback to control UE reporting behavior. When measurement reports are validated as current, the UE reduces or stops reporting, minimizing signaling overhead. When invalidation occurs or validation expires, the UE resumes reporting to maintain reliability, thus dynamically adjusting signaling volume based on actual needs
Solution Approach 2:
The system changes the temporal parameters of measurement reporting based on validation status. The reporting frequency, periodicity, and timing are adjusted dynamically - validated reports extend the interval between transmissions, while invalidation triggers earlier updates, optimizing the balance between reliability and signaling overhead
3Measurement precision
If the network entity validates measurement reports to ensure accuracy, then beam selection accuracy is improved, but processing time and latency increase
Solution Approach 1:
The network entity performs partial validation by selecting specific measurement reports for validation based on priority, age, or confidence metrics rather than validating all reports equally. High-priority or recently received reports may receive expedited validation, while lower-priority reports are validated on a standard schedule, reducing overall validation latency while maintaining accuracy for critical beams
Solution Approach 2:
The system performs preliminary validation checks on measurement reports before they are fully processed and used for beam selection. Quick validation metrics are assessed upfront to determine if full validation is needed, allowing the network to quickly accept obviously valid reports and apply more thorough validation only when necessary, thus reducing average validation time
Data Source
AI summary
Methods, systems, and devices for invalidating a measurement report are described. A user equipment (UE) may receive a message indicating of a set of parameters associated with transmission of a measurement report and may receive one or more reference signals. The UE may transmit, in accordance with the set of parameters, the measurement report indicating a set of measurements associated with the one or more reference signals received by the UE. Additionally, the UE may transmit an invalidation message indicating that at least a portion of the measurement report is invalid based on a subsequent measurement associated with the one or more reference signals differing by a threshold amount from a corresponding measurement of the set of measurements.