Predictive Beam Management for Wireless UE Latency
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing beams in fast-changing multi-path environments, leading to latency issues in beam activation, which can result in obsolete beam configurations for user equipment (UE) in motion, especially in scenarios like high-speed trains or vehicles.
Innovation Solution
The implementation of a predictive beam management framework that utilizes beam measurement reports from UEs to generate a spatial map of the multi-path channel, estimates the UE's trajectory, and signals future beam indications (TCI states) with corresponding activation times, allowing the UE to apply optimal beam configurations proactively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional beam management is used in fast-changing multi-path environments, then the system maintains simple beam configuration procedures, but beam activation latency increases and beam configurations become obsolete for moving UEs
Solution Approach 1:
The system performs preliminary actions by generating a spatial map of the multi-path channel and predicting future UE trajectories in advance. Beam indication information (TCI states) is prepared and signaled to the UE before the UE actually needs to switch beams, allowing the UE to proactively apply optimal beam configurations rather than reactively switching after movement occurs. This predictive approach reduces beam activation latency while managing complexity through structured spatial mapping and trajectory estimation.
2Measurement precision
If the system signals future beam indications with activation times, then beam configuration accuracy improves for moving UEs, but the complexity of beam management procedures increases
Solution Approach 1:
The base station performs preliminary spatial mapping of the multi-path channel and predicts UE trajectories in advance. Future beam indications (TCI states) with specific activation times are generated and signaled to the UE before the UE needs to switch beams. This allows the UE to proactively apply the correct beam configuration at the precise moment needed, improving accuracy while managing complexity through structured procedures.
Solution Approach 2:
The system utilizes beam measurement reports from the UE as feedback to continuously update the spatial map of the multi-path channel and refine trajectory predictions. This feedback loop enables the base station to adapt beam indications to actual UE movement patterns, improving configuration accuracy. The feedback mechanism manages complexity by focusing on key measurement parameters and using them to update predictions incrementally.
3Reliability
If the system uses predictive beam management with spatial mapping and trajectory estimation, then communication reliability improves in high-speed scenarios, but the processing complexity increases
Solution Approach 1:
The base station performs preliminary spatial mapping of the multi-path channel environment and predicts UE trajectories in advance of actual beam switching needs. By preparing beam indication information (TCI states) with activation times before the UE moves, the system ensures reliable communication in high-speed scenarios. The UE proactively applies predicted beam configurations rather than reacting after movement, maintaining connection reliability even during rapid motion.
Solution Approach 2:
Beam measurement reports from the UE provide continuous feedback that updates the spatial map and refines trajectory predictions. This feedback enables the system to adapt to actual UE movement patterns, improving reliability in dynamic high-speed scenarios. The processing complexity is managed by focusing computational resources on key measurement parameters and using efficient prediction algorithms.
Data Source
AI summary
Methods and apparatuses for predictive beam management in a wireless communication system. A method of operating a user equipment (UE) includes receiving configuration information for transmission configuration indication (TCI) states; receiving information indicating a number of TCI states and a number of corresponding TCI state application times; and determining, for one or more TCI states in the number of TCI states, at least one of downlink (DL) quasi-co-location (QCL) properties for DL communication and an uplink (UL) spatial domain filter for UL communication. The method further includes at least one of receiving, using the determined DL QCL properties, DL channels starting at the corresponding TCI state application times and transmitting, using the determined UL spatial filter, UL channels starting at the corresponding TCI state application times.