Beam Management Channel Statistics Reporting
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Solution Overview
Problem
Current beam management techniques in wireless communications often select beams or channels based solely on Reference Signal Received Power (RSRP), neglecting other channel statistics, which can lead to sub-optimal performance and reduced reliability due to factors like frequency and time selectivity.
Innovation Solution
The proposed solution involves user equipment (UE) measuring and reporting both RSRP and additional channel statistics such as frequency selectivity, time selectivity, frequency correlation, and time correlation to the base station, enabling more optimal beam or channel selection for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam selection is based solely on RSRP, then the selection process is simple and fast, but the communication reliability and performance are sub-optimal due to neglecting channel statistics like frequency and time selectivity
Solution Approach 1:
The channel statistics measurement is segmented into distinct components: frequency selectivity measurement, time selectivity measurement, frequency correlation measurement, and time correlation measurement. Each component is measured and reported separately, allowing the base station to comprehensively evaluate channel conditions without overwhelming the UE with a single complex measurement task
Solution Approach 2:
The invention transitions from one-dimensional RSRP-based beam selection to multi-dimensional evaluation by incorporating frequency and time domain statistics. This dimensional expansion allows the system to account for channel variations across different frequencies and time instances, significantly improving reliability while distributing the measurement complexity across multiple independent dimensions
2Measurement precision
If comprehensive channel statistics are measured and reported, then beam and channel selection accuracy is improved, but the measurement and reporting overhead increases
Solution Approach 1:
The invention extracts only the essential channel statistics parameters needed for beam management: frequency selectivity, time selectivity, frequency correlation, and time correlation. By selecting and reporting only these specific parameters rather than all possible channel characteristics, the system achieves high measurement precision while controlling reporting overhead to manageable levels
Solution Approach 2:
The channel statistics measurement framework is designed to be universally applicable across different beam management scenarios. The same set of four statistics (frequency/time selectivity and correlation) serves multiple functions: beam selection, channel quality assessment, and link reliability evaluation, thereby maximizing measurement precision without proportionally increasing overhead
3Productivity
If multiple channel statistics are considered for beam selection, then spectral efficiency and data rates are improved, but the processing and computation requirements increase
Solution Approach 1:
The UE performs preliminary measurements of all four channel statistics (frequency selectivity, time selectivity, frequency correlation, time correlation) during the beam management procedure. These measurements are prepared in advance and reported to the base station, which then uses them for beam and channel selection. This preliminary action approach allows comprehensive analysis without increasing real-time processing complexity during data transmission
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may measure a received power of one or more reference signals, such as channel state information (CSI) reference signals (CSI-RSs) or synchronization signal blocks (SSBs), transmitted by a base station for a beam management procedure. The UE may determine a set of channel statistics associated with a channel used by the base station to transmit the one or more reference signals based on performing the beam management procedure. The UE may transmit a report to the base station, the report including at least an indication of the received of the one or more reference signals and the set of channel statistics. The base station may select a beam or a channel for communication with the UE based on at least the indication of the received power and the set of channel statistics.