DCI-Triggered CSI Reporting for Flexible PUSCH Slot Timing
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Solution Overview
Problem
Current mobile communication systems face challenges in managing high-speed data services, resource shortages, and user demands for increased data transfer rates, connection device capacity, low latency, and energy efficiency, necessitating advanced techniques like small cell enhancement, dual connectivity, and CSI reporting improvements.
Innovation Solution
A method for determining a slot offset in CSI reporting using DCI-triggered CSI reports, involving a user equipment that receives RRC signaling with multiple reporting settings, forms lists of time offsets, and transmits CSI reports based on the largest list entry indexed by a 2-bit index value, supporting aperiodic CSI reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple reporting settings are configured with different time offset lists, then the system supports flexible CSI reporting configurations, but determining the correct slot offset becomes complex and ambiguous
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple reporting settings with different time offset lists through RRC signaling before CSI reporting is needed. The DCI then triggers a specific reporting setting by indicating an index value, allowing the system to have multiple pre-prepared configurations ready for selection based on current channel conditions and scheduling requirements.
Solution Approach 2:
The patent introduces an intermediary mechanism where the DCI message acts as a mediator between the configured reporting settings and the actual CSI reporting process. The DCI contains an index value that selects which pre-configured reporting setting (and its associated time offset list) should be used, simplifying the determination process by providing a clear mapping from index to configuration.
2Measurement precision
If the CSI report transmission timing is dynamically adjusted based on multiple time offset lists, then reporting accuracy is improved, but processing time and complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple reporting settings with different time offset lists through RRC signaling before CSI reporting is needed. The DCI then triggers a specific reporting setting by indicating an index value, allowing the system to have multiple pre-prepared configurations ready for selection based on current channel conditions and scheduling requirements.
Solution Approach 2:
The patent applies local quality by allowing different time offset lists to be associated with different reporting settings, each optimized for specific scenarios. The index value in the DCI selects the appropriate local configuration (time offset list) based on current needs, enabling precise timing control tailored to specific reporting requirements without forcing a one-size-fits-all approach.
3Loss of energy
If a 2-bit index value is used to select from multiple reporting settings, then signaling overhead is reduced, but the number of configurable options is limited
Solution Approach 1:
The patent applies segmentation by dividing the reporting settings into multiple groups or configurations, each with its own time offset list. The 2-bit index value segments the selection space into 4 distinct options, allowing the system to manage complexity by organizing reporting settings in structured groups rather than requiring a single large configuration set.
Solution Approach 2:
The patent applies universality by designing the reporting setting structure to be multi-functional and reusable. Each reporting setting configuration can serve different purposes (periodic, aperiodic, semi-persistent reporting with different offsets), and the same framework supports multiple serving cells and bandwidth parts, reducing the need for separate configurations for each scenario.
Data Source
AI summary
The present invention provides a method of reporting, by a UE, CSI in a wireless communication system, the method comprising: receiving, from a base station, a RRC signaling that comprises a plurality of reporting settings, wherein each reporting setting comprises a corresponding list of first values representing time offsets for transmitting a CSI report, forming a plurality of lists of first values; receiving, from the base station, DCI triggering the CSI report, wherein the DCI comprises an index value related to a time at which to transmit the CSI report on a PUSCH; determining, based on the DCI, a plurality of list entries; determining a second value that is largest among the plurality of list entries; and transmitting, to the base station, the CSI report on the PUSCH based on the second value.