Spatial Resource Selection Filtering for Wireless Beamforming
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Solution Overview
Problem
In wireless communication systems, the accuracy of spatial resource selection is compromised when reference signals are transmitted in different frequency intervals at different time intervals, leading to less accurate channel condition estimation and inappropriate spatial resource selection.
Innovation Solution
A method for filtering instantaneous discontinuous transmission (DTX) states to identify and select spatial resources with good quality for beamforming processing, involving determining quality states for each spatial resource, filtering these states, and deciding on their suitability for selection based on filtered values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reference signals are transmitted in different frequency intervals at different time intervals, then frequency diversity is achieved, but channel condition estimation accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by performing quality state filtering on reference signals before using them for spatial resource selection. The filtering process prepares the channel condition estimates in advance, ensuring that only quality states meeting certain criteria are used for beamforming decisions, thereby maintaining accuracy despite frequency hopping
Solution Approach 2:
The patent implements feedback by evaluating the quality state of each reference signal and using this information to determine whether to include that reference signal in the spatial resource selection process. The quality state feedback mechanism allows the system to adaptively select reliable channel estimates while discarding unreliable ones, resolving the contradiction between frequency diversity and estimation accuracy
2Speed
If instantaneous DTX states are used directly for spatial resource selection, then processing speed is maintained, but selection accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by filtering instantaneous DTX states before spatial resource selection. The filtering operation prepares quality state values in advance, ensuring that only reliable DTX states are used for beamforming, thereby improving selection accuracy without significantly impacting processing speed
Solution Approach 2:
The patent introduces an intermediary filtering mechanism between DTX state detection and spatial resource selection. This intermediary process evaluates quality states and determines inclusion in the selection set, acting as a mediator that improves accuracy while maintaining acceptable processing speeds through efficient filtering algorithms
Data Source
AI summary
A method is disclosed for spatial resource selection from a plurality of spatial resources. The method comprises, for each of least one spatial resource of the plurality of spatial resources, determining, for each of multiple time instances, a quality state for the spatial resource, based on reference signals received on the spatial resource, and filtering the quality states, to determine a filtered quality state value for the spatial resource. The method further comprises determining whether the spatial resource is to be considered for spatial resource selection based on the filtered quality state value. The spatial resources may be beams of a beam-forming application, or antennas of a multi-antenna arrangement, or multiple-input multiple-output (MIMO) streams, for example. The reference signals may comprise one or more of uplink reference signals, sounding reference signals, demodulation reference signals, and phase tracking reference signals. Corresponding apparatus, network node (e.g., base station), and computer program product are also disclosed.