UE Beam Reporting Thresholds for Lower Uplink Overhead
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Solution Overview
Problem
Legacy beam management procedures in communication devices result in high UL and control signaling overhead due to frequent beam reporting, while less frequent reporting leads to outdated beam information, causing performance degradation.
Innovation Solution
A method for communication devices and user equipment (UE) that configures UL transmissions based on channel state information (CSI) reports, using thresholds and timers to optimize beam reporting, and includes conditions for transmitting physical uplink control channels (PUCCH) and physical uplink shared channels (PUSCH) to reduce unnecessary reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent periodic or semi-persistent beam reporting is configured, then the network can timely acquire the best beam for data/control transmissions, but the UL reporting overhead and control signaling overhead increase significantly
Solution Approach 1:
The patent implements dynamic beam reporting mechanisms where the reporting frequency and triggering conditions are adjusted based on current channel conditions. The system transitions from static frequent reporting to dynamic event-driven reporting, where beam reports are transmitted only when specific conditions are met (e.g., beam quality changes, threshold violations), thereby reducing overhead while maintaining timely beam acquisition.
Solution Approach 2:
The patent changes the reporting parameters from fixed periodic intervals to variable event-triggered mechanisms. By modifying the reporting trigger conditions and frequency based on channel state conditions, the system optimizes the balance between beam acquisition timeliness and reporting overhead, reducing unnecessary reports while maintaining performance.
2Quantity of substance
If less frequent beam reporting is configured, then the UL reporting overhead is reduced, but the beam information becomes outdated, leading to performance degradation
Solution Approach 1:
The patent implements feedback mechanisms where the network receives beam reports triggered by specific channel conditions and uses this feedback to adjust reporting behavior. The system monitors channel quality and triggers reports only when necessary, creating a closed-loop system that maintains beam information freshness while minimizing overhead through condition-based triggering.
Solution Approach 2:
The patent prepares the UE with configuration information about triggering conditions and thresholds in advance, so that the UE can autonomously determine when to send beam reports without waiting for network commands. This preliminary configuration enables event-driven reporting that maintains timely beam information while reducing overhead by avoiding unnecessary reports.
3Quantity of substance
If event-driven UL transmission is implemented with thresholds and timers, then unnecessary reporting is reduced, but the complexity of transmission conditions increases
Solution Approach 1:
The patent segments the complex transmission conditions into distinct, manageable components: threshold conditions (e.g., beam quality thresholds), timer-based conditions (e.g., reporting within a time window), and event triggers (e.g., channel state changes). By dividing the complex logic into separate conditions, the system makes the UE implementation more manageable while reducing overall signaling overhead through selective reporting.
Data Source
AI summary
A method for communication device handling uplink (UL) transmission and a user equipment are provided. The method includes: receiving a first channel state information (CSI) report configuration from a network, wherein the first CSI report configuration comprises at least one of an event type, a resource for a physical uplink control channel (PUCCH), or a set of reference signals; performing at least one measurement for the set of reference signals according to the first CSI report configuration; and transmitting the PUCCH if a value is greater than or equal to a first threshold and a timer does not expire, wherein the first threshold or the timer is configured by a higher layer signal.