Event-Triggered Beam Measurement Reporting for Wireless UEs
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing beam measurement reporting, particularly in non-terrestrial networks, where high mobility and frequent beam switching lead to increased signaling overhead and power consumption, and existing techniques lack granularity in beam-level measurements.
Innovation Solution
The proposed solution involves configuring user equipment (UE) to receive beam measurement configurations associating each beam with a respective bandwidth part of the radio frequency spectrum, allowing for monitoring and reporting of channel quality based on event conditions, such as threshold beam quality or block error rate, enabling flexible and efficient beam selection and reducing power consumption through event-based initiation of measurement reports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam measurement reporting is performed frequently to maintain communication quality in high mobility scenarios, then communication reliability is improved, but signaling overhead and power consumption increase
Solution Approach 1:
The patent implements event-triggered beam measurement reporting where the UE periodically monitors beam quality metrics (such as RSRP, RSRQ, or SINR) and only generates measurement reports when specific events occur (e.g., when beam quality degrades below a threshold or when a better beam becomes available). This periodic monitoring with event-based reporting reduces power consumption compared to continuous reporting while maintaining communication reliability in high mobility scenarios.
Solution Approach 2:
The network configures the UE with event conditions that include threshold parameters for beam quality metrics. When measured parameters (RSRP, RSRQ, SINR) change and cross these thresholds, events are triggered. This parameter-based event triggering optimizes the balance between reporting frequency and power consumption by adapting reporting only when necessary.
2Measurement precision
If detailed beam-level measurement reporting is implemented to improve beam selection accuracy, then beam selection precision is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts and reports only the essential beam measurement information that is necessary for beam selection decisions. Instead of reporting all possible beam parameters continuously, the UE extracts and reports specific metrics (such as identified beam ID, RSRP, RSRQ, SINR) only when event conditions are met. This selective extraction reduces signaling overhead while maintaining beam selection accuracy.
Solution Approach 2:
The patent implements partial reporting where the UE reports beam measurement information selectively based on event triggers rather than providing complete continuous information. The reporting includes only the beams that meet specific criteria (e.g., beams exceeding quality thresholds or beams showing significant quality changes), which reduces signaling overhead while providing sufficient information for accurate beam selection.
3Loss of information
If cell-level measurement reporting is used to reduce signaling overhead, then signaling overhead is reduced, but beam-level measurement granularity is lost
Solution Approach 1:
The patent segments the measurement reporting at the beam level rather than aggregating at the cell level. Each beam is measured and reported independently with its own quality metrics (RSRP, RSRQ, SINR) and event conditions. This segmentation enables the network to identify and select specific beams for communication, maintaining beam-level granularity while using efficient event-triggered reporting to control signaling overhead.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some networks, a user equipment (UE) may switch between serving beams of a transmitting device that are associated with different bandwidth parts of a radio frequency spectrum. To improve aspects of beam measurement and selection, a UE may be configured to support various techniques for beam measurement according to the different bandwidth parts. For example, a UE may receive a beam measurement configuration associated with one or more beams, and may monitor for reference signals associated with the beams using the different bandwidth parts. The UE may determine a channel quality of one or more of the beams based on the monitoring, and transmit a beam measurement report to the network in accordance with the beam measurement configuration. In some examples, such a report may be transmitted based on the UE determining that an event condition is satisfied.