Terminal Device Channel State Information Reporting Subframe Sets
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Solution Overview
Problem
The existing wireless communication systems, particularly in the LTE context, have not effectively utilized channel state information for efficient communication, leading to suboptimal resource allocation and performance.
Innovation Solution
The proposed solution involves a terminal device and base station device that utilize specific downlink control information to trigger and manage channel state information reports, using physical uplink shared channels to efficiently communicate and allocate resources based on channel state indicators, allowing for dynamic subframe set management and CSI process coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel state information reporting is implemented in existing LTE systems, then communication performance can be improved, but the system complexity and resource overhead increase due to lack of standardized procedures
Solution Approach 1:
The patent segments the channel state information reporting procedure into distinct components: CSI request fields in downlink control information, subframe set indications, and specific reporting triggers. This segmentation allows for standardized, modular implementation that improves reliability while controlling system complexity through structured information elements.
Solution Approach 2:
The patent creates a universal CSI reporting framework that can be applied across different LTE configurations and traffic types. The standardized procedure uses common information elements (CSI request fields, subframe set indications) that work universally across various deployment scenarios, improving communication performance without requiring separate mechanisms for each case.
2Productivity
If dynamic subframe set management is implemented for CSI reporting, then resource allocation efficiency improves, but the control signaling overhead increases
Solution Approach 1:
The patent extracts the essential subframe set indication information and embeds it efficiently within existing downlink control information structures. By taking out only the necessary subset of information (subframe set identifiers and CSI request flags) rather than transmitting complete configuration data, the system achieves dynamic resource allocation while minimizing control signaling overhead.
Solution Approach 2:
The patent implements partial action by triggering CSI reporting only in specific subframe sets identified by the base station, rather than requiring continuous reporting across all subframes. This selective triggering mechanism improves resource allocation efficiency by obtaining CSI only when and where needed, reducing overall control signaling overhead while maintaining system performance.
Data Source
AI summary
There is provided a terminal device that communicates with a base station device. The terminal device includes a reception unit that receives downlink control information which is used for scheduling of a physical uplink shared channel and includes first information used to trigger a report of channel state information using the physical uplink shared channel, a higher layer signal including second information used to indicate two subframe sets, and the higher layer signal including third information. The third information is used to indicate a subframe set of the two subframe sets for which the report of the channel state information is triggered in a case that the report of the channel state information is triggered by a first value of a field of the first information, the third information is used to indicate a subframe set of the two subframe sets for which the report of the channel state information is triggered in a case that the report of the channel state information is triggered by a second value in the field of the first information, and the third information is used to indicate a subframe set of the two subframe sets for which the report of the channel state information is triggered in a case that the report of the channel state information is triggered by a third value in the field of the first information.