Adaptive Spatial Multiplexing for Reception Quality Reporting
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Solution Overview
Problem
Conventional communication methods fail to efficiently report reception quality information, leading to suboptimal data transmission efficiency as the process remains fixed regardless of transmission status.
Innovation Solution
The terminal apparatus reports reception quality information using a spatial multiplexing method identical or independent of the data's method, depending on whether the reporting is aperiodic or periodic, and specifies partial precoder information from a group of candidates, allowing the base-station apparatus to extract this information accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same spatial multiplexing method is used for both data and reception quality information, then implementation complexity is reduced, but transmission efficiency deteriorates when adaptive reporting is needed
Solution Approach 1:
The patent applies dynamics by making the spatial multiplexing method adaptive rather than fixed. The terminal device dynamically selects between first and second spatial multiplexing methods based on whether reception quality information needs to be reported, allowing the system to optimize between simplicity and efficiency according to actual transmission needs
2Device complexity
If a fixed process is used for reporting reception quality information, then system complexity is reduced, but transmission efficiency deteriorates
Solution Approach 1:
The patent implements a dynamic reporting mechanism where the terminal device determines whether to report reception quality information based on transmission status. This dynamic approach allows the system to adapt the reporting process to actual needs, improving transmission efficiency without requiring overly complex fixed procedures for all scenarios
3Reliability
If reception quality information is always reported, then transmission reliability is improved, but overhead increases
Solution Approach 1:
The patent applies partial action by reporting reception quality information only when necessary rather than always. The terminal device selectively reports information based on whether the transmission status requires it, providing sufficient reliability for critical transmissions while reducing overhead when full reporting is not needed
Data Source
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AI summary
A base-station apparatus (101) and a terminal apparatus (102) communicate with each other in a communication system. When reporting reception quality information together with data to the base-station apparatus via a channel for use in data transmission, the terminal apparatus reports the reception quality information using a spatial multiplexing method identical to a spatial multiplexing method of the data if the reception quality information is reception quality information that is to be nonoperiodically reported, and reports the reception quality information using a spatial multiplexing method independent of the spatial multiplexing method of the data if the reception quality information is reception quality information that is to be periodically reported. When extracting the reception quality information reported together with the data from the terminal apparatus, the base-station apparatus extracts the reception quality information based on the assumption that the spatial multiplexing method of the reception quality information is identical to the spatial multiplexing method of the data if the reception quality information is nonoperiodically reported, and extracts the reception quality information based on the assumption that the spatial multiplexing method of the reception quality information is independent of the spatial multiplexing method of the data if the reception quality information is periodically reported.