User Terminal CSI Reporting Overlap Control
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Solution Overview
Problem
Legacy LTE systems face challenges in controlling CSI reporting when different configurations are applied, such as varying the types and timings of CSI reporting, leading to difficulties in managing overlapping transmission timings in future radio communication systems like 5G and NR.
Innovation Solution
A user terminal is designed to transmit first and second CSI types using uplink control and shared channels based on configurations set by the base station, with control mechanisms to handle overlapping transmission timings by compressing, puncturing, or changing formats of CSI parameters, allowing both CSIs to be transmitted simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple CSI reporting configurations are applied with different timings and types, then CSI reporting capability is improved, but transmission timing management becomes complex and difficult to control
Solution Approach 1:
The patent changes the parameters of CSI reporting by introducing multiple CSI reporting configurations with different types (first CSI and second CSI), periodicities, and offsets. This allows the system to adapt to different channel state information requirements while providing a structured framework for managing transmission timings through configurable parameters rather than complex ad-hoc scheduling.
2Reliability
If different CSI reporting configurations are used, then communication quality is improved, but transmission resource coordination becomes difficult
Solution Approach 1:
The patent segments CSI reporting into different types (first CSI and second CSI) with distinct configurations. This segmentation allows independent optimization of each CSI type for different communication quality requirements while simplifying resource coordination by providing clear rules for handling overlaps between segmented CSI reporting instances.
Solution Approach 2:
The patent introduces dynamic control mechanisms where the UE determines whether to transmit both CSIs or select one based on overlapping timing conditions. This dynamic approach allows the system to adapt transmission resource usage in real-time based on actual timing configurations, improving ease of operation while maintaining communication quality.
3Ease of operation
If CSI transmission timings are increased to avoid overlaps, then transmission coordination is simplified, but reporting flexibility is reduced
Solution Approach 1:
Rather than statically increasing timing intervals to avoid overlaps, the patent implements dynamic coordination rules that allow the UE to intelligently determine transmission behavior based on actual timing configurations. This maintains reporting flexibility by allowing tight timing configurations while simplifying coordination through clear decision rules for handling overlaps.
Data Source
AI summary
To appropriately control UL transmission such as a CSI reporting when communication is performed by applying a different configuration from those of legacy LTE systems, one aspect of a user terminal according to the present invention includes: a transmitting section that transmits first Channel State Information (CSI) and second CSI of different information types to be reported, by using an uplink control channel and/or an uplink shared channel based on timings respectively configured by a base station; and a control section that, when transmission timings of the first CSI and the second CSI overlap, performs control to transmit both or one of the first CSI and the second CSI.