UE Beam Reporting Triggers for Lower Uplink Signaling 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signaling overhead due to frequent periodic or semi-persistent beam reporting, while less frequent reporting leads to outdated beam information, causing performance degradation.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, including threshold-based and timer-based conditions for transmitting physical uplink control channels (PUCCH) and uplink channels, utilizing reference signal measurements and event types to optimize beam 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 become large
Solution Approach 1:
The patent implements dynamic beam reporting mechanisms where the reporting frequency and triggering conditions are adjusted based on channel conditions and network requirements. The system transitions from static frequent reporting to dynamic event-driven reporting, reducing overhead while maintaining beam acquisition timeliness through conditional triggering based on channel state changes.
Solution Approach 2:
The patent changes the reporting parameters from fixed periodic intervals to variable event-triggered mechanisms. By modifying the reporting configuration parameters to include event types, thresholds, and timing conditions, the system optimizes the balance between beam reporting frequency and overhead reduction, allowing flexible adaptation to different communication scenarios.
2Quantity of substance
If less frequent beam reporting is configured, then the signaling overhead is reduced, but the beam information becomes outdated leading to performance degradation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 reporting based on configured events and conditions. The system uses feedback loops to monitor channel conditions and trigger reporting when necessary, ensuring beam information remains fresh without requiring continuous frequent reporting. The feedback mechanism includes event-triggered notifications and timer-based updates that activate only when needed.
Solution Approach 2:
The patent applies preliminary action by pre-configuring event types, thresholds, and timing parameters before actual beam reporting occurs. The system prepares reporting configurations in advance, including setting trigger conditions and default behaviors, so that when events occur, reporting can be activated immediately without delay, maintaining beam information freshness while minimizing overhead.
3Measurement precision
If event-driven UL transmission is implemented with threshold conditions, then the beam reporting accuracy is improved, but the complexity of determining transmission conditions increases
Solution Approach 1:
The patent segments the complex transmission condition evaluation into distinct, manageable components. The event-driven mechanism divides the decision-making process into separate evaluation steps: measuring channel state information, comparing against predefined thresholds, determining event triggers, and selecting appropriate PUCCH resources. This segmentation reduces the cognitive complexity of the overall system by breaking down the evaluation process into modular functions.
Solution Approach 2:
The patent uses standardized threshold values and event type definitions that can be copied and reused across different configuration scenarios. By establishing a library of predefined events and threshold conditions, the system reduces the complexity of creating new transmission conditions through reuse and inheritance, allowing complex evaluations to be built from simpler, pre-defined templates.
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 includes 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 determining whether to transmit the PUCCH according to the at least one measurement.