Differentiated CSI Feedback for PDSCH Decoding Statistics
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting channel state information (CSI) feedback for physical downlink shared channel (PDSCH) decoding statistics, particularly in timely and urgent cases of unsuccessful decoding, leading to wasted resources and power.
Innovation Solution
User equipment (UE) transmits CSI feedback differently for successful and unsuccessful PDSCH decoding, providing statistics sooner for unsuccessful decoding and aggregating them for multiple successful decodings to facilitate quicker adjustments, thereby conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSI feedback is transmitted using the same operation for both successful and unsuccessful PDSCH decoding, then the feedback mechanism is simple and consistent, but unsuccessful decoding feedback is delayed and resources are wasted
Solution Approach 1:
The patent segments the CSI feedback transmission into two distinct operations: a first operation for unsuccessful PDSCH decoding feedback and a second operation for successful PDSCH decoding feedback. This segmentation allows unsuccessful decoding feedback to be transmitted with higher priority and shorter delay, resolving the contradiction between maintaining simple feedback mechanisms and reducing feedback delay for critical cases.
Solution Approach 2:
The patent implements dynamic feedback transmission by adapting the feedback operation based on the decoding outcome. When decoding fails, the system dynamically switches to the first operation with shortened delay; when decoding succeeds, it uses the second operation with normal delay. This dynamic adaptation resolves the contradiction by making the feedback mechanism flexible rather than static.
2Loss of time
If CSI feedback is transmitted individually for each PDSCH decoding result, then timely feedback is provided for unsuccessful decoding, but signaling overhead and resource consumption increase
Solution Approach 1:
The patent merges multiple successful PDSCH decoding feedback instances into a single aggregated CSI report transmitted via the second operation. This combining approach reduces signaling overhead and energy consumption while maintaining timely feedback for unsuccessful decodings through the first operation, thus resolving the contradiction between timely feedback and resource efficiency.
Solution Approach 2:
The patent applies partial action by transmitting full-detailed feedback only when necessary (unsuccessful decoding via first operation), while using aggregated summaries for routine successful decodings (second operation). This selective approach to feedback detail levels reduces overall signaling overhead while ensuring critical feedback is transmitted completely and timely.
3Productivity
If differentiated feedback operations are implemented for successful and unsuccessful PDSCH decoding, then resource allocation efficiency improves, but system complexity increases
Solution Approach 1:
The patent applies local quality by assigning different feedback transmission characteristics to different decoding outcomes: unsuccessful decodings receive high-priority treatment with shortened delay and dedicated resources, while successful decodings use standard aggregation procedures. This localized optimization improves resource allocation efficiency without requiring complete system redesign, thus managing complexity while enhancing productivity.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that a communication on a physical downlink shared channel (PDSCH) was successfully decoded or was not successfully decoded. The UE may transmit channel state information (CSI) feedback that includes PDSCH decoding information via a first operation based at least in part on the determination that the communication was successfully decoded, or via a second operation based at least in part on the determination that the communication was not successfully decoded. Numerous other aspects are provided.