Uplink Beam Selection with MPE-Conditional Reporting
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently reporting channel state information for large antenna arrays, particularly in 5G/NR systems, due to limitations in channel quality reporting processes, which affect beam selection and can lead to reduced throughput and coverage, especially when Maximum Permissible Exposure (MPE) regulations are considered.
Innovation Solution
The implementation of methods and apparatuses for uplink transmit beam selection in user equipment (UE) and base stations, which include processors configured to measure and report beam quality based on measurement reference signal resources, determining whether the MPE limit is met, and transmitting this information to adjust beam settings accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing channel quality reporting processes are used for large antenna arrays, then device complexity is reduced, but measurement precision and beam selection accuracy deteriorate
Solution Approach 1:
The patent segments the beam reporting process into multiple components: beam quality measurement based on reference signals, MPE limit assessment, and conditional reporting. This segmentation allows the system to handle large antenna arrays by breaking down the complex measurement task into manageable parts, improving measurement precision without overwhelming device complexity
Solution Approach 2:
The patent performs preliminary actions by pre-configuring measurement reference signal resources and pre-assessing MPE limits before actual beam selection. This preliminary preparation enables more accurate beam quality measurements to be performed efficiently, resolving the contradiction between measurement precision and device complexity
2Reliability
If MPE limit checks are performed for all beams, then safety compliance is improved, but processing time and complexity increase
Solution Approach 1:
The patent applies partial action by performing MPE limit checks selectively rather than for all beams. The system checks MPE limits based on configured parameters and only when necessary for the current beam selection scenario, ensuring safety compliance while avoiding unnecessary processing time and complexity
Solution Approach 2:
The patent implements feedback mechanisms where beam reporting results including MPE compliance information are fed back to the network. This feedback enables the network to adjust future beam configurations and MPE check requirements, optimizing the balance between safety compliance and processing efficiency over time
3Measurement precision
If detailed beam quality measurement is performed, then beam selection accuracy is improved, but information processing load increases
Solution Approach 1:
The patent extracts only the essential beam quality information needed for effective beam selection, rather than processing all possible measurement data. By taking out and reporting only the most relevant beam quality metrics and MPE compliance status, the system achieves good beam selection accuracy while reducing information processing load
Solution Approach 2:
The patent changes parameters by configuring measurement reference signal resources and beam reporting parameters according to specific deployment scenarios. This parameter adaptation allows the system to adjust measurement detail levels dynamically, achieving appropriate beam selection accuracy while managing information processing load efficiently
Data Source
AI summary
Methods and apparatuses for uplink transmit beam selection. A method for operating a user equipment (UE) includes receiving configuration information including information on a plurality of measurement reference signal (RS) resources and information on a beam reporting, measuring the measurement RS resources, and calculating the beam reporting based on the measurement. The method further includes determining whether a maximum permissible exposure (MPE) limit is met and transmitting the beam reporting. Content of the beam reporting depends on whether the MPE limit is met or not.