CSI Measurement for Redcap Terminals Using Resource Subsets
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Solution Overview
Problem
The Redcap terminal in 5G NR systems, with limited bandwidth, faces challenges in measuring channel state information (CSI) across all resources simultaneously due to bandwidth constraints, necessitating the segmentation of measurement resources into subsets.
Innovation Solution
The method involves configuring multiple measurement resource subsets with distinct measurement time units, allowing for independent configuration of measurement slots and symbols, enabling the terminal to measure CSI reference signals across different resource subsets within these time units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple frequency band parts are configured for the Redcap terminal, then frequency diversity and selective gain are improved, but the terminal cannot measure all resources at the same time due to limited bandwidth
Solution Approach 1:
The patent divides the measurement resources into multiple measurement resource subsets, where each subset corresponds to a specific frequency band part. The terminal measures CSI reference signals in each subset separately within different measurement time units, enabling comprehensive measurement across multiple frequency bands despite limited terminal bandwidth.
Solution Approach 2:
The patent introduces the time dimension by configuring different measurement time units for different measurement resource subsets. This allows the terminal to measure multiple frequency band parts sequentially in time, transforming a spatial measurement problem into a temporal measurement process.
2Reliability
If a bandwidth part greater than terminal bandwidth is configured, then frequency selective gain is improved, but measurement complexity increases due to resource segmentation requirements
Solution Approach 1:
The patent segments the bandwidth part into multiple measurement resource subsets, each fitting within the terminal's bandwidth capability. This segmentation reduces the complexity of simultaneous measurement while maintaining the ability to achieve frequency selective gain across the entire bandwidth part.
Solution Approach 2:
The patent pre-configures multiple measurement resource subsets and their corresponding measurement time units before actual CSI measurement. This preliminary configuration simplifies the measurement process by establishing a structured framework that guides the terminal through sequential measurements without requiring complex real-time decisions.
3Area of stationary object
If measurement resources are segmented into subsets, then measurable bandwidth is improved, but configuration time for CSI reference signals increases
Solution Approach 1:
The patent segments measurement resources into multiple subsets, each associated with a specific measurement time unit. This segmentation enables the terminal to measure bandwidths greater than its reception and transmission bandwidth by distributing measurements across multiple time units, effectively expanding the measurable bandwidth.
Solution Approach 2:
The patent ensures continuous measurement activity by configuring overlapping or adjacent measurement time units for different measurement resource subsets. This continuity minimizes idle time between measurements and reduces overall configuration time while maintaining comprehensive bandwidth coverage.
Data Source
AI summary
The present disclosure provides channel state information measurement methods and apparatuses and storage media. The channel state information measurement method includes: determining multiple measurement resource subsets for performing channel state information reference signal measurement and measurement time units respectively corresponding to the multiple measurement resource subsets, where different measurement resource subsets correspond to different measurement time units; measuring, within the measurement time units corresponding to the multiple measurement resource subsets, a channel state information reference signal.