Dynamic Semi-Persistent CSI Report Adaptation
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Solution Overview
Problem
Current wireless communication systems face challenges in maintaining reliable CSI reporting due to suboptimal transmission parameters, leading to poor coverage and reliability of beam management procedures, especially when the size of CSI reports exceeds the payload capacity of the uplink channel.
Innovation Solution
The dynamic adaptation of semi-persistent CSI report settings by the base station, where the base station configures a second set of transmission parameters with higher reliability levels, indicated through control messages like DCI or MAC-CE, to enhance the coverage and reliability of CSI reporting between the base station and the UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station uses a first set of transmission parameters for CSI reporting, then the system maintains basic operational simplicity, but the coverage and reliability of CSI reporting deteriorate when data size exceeds uplink channel payload capacity
Solution Approach 1:
The patent implements dynamic adaptation of transmission parameters by allowing the base station to switch between a first set of transmission parameters and a second set of transmission parameters based on current channel conditions and data size requirements. This dynamic parameter adjustment enables the system to adapt to varying reliability needs without permanent structural changes, resolving the contradiction between maintaining operational simplicity and achieving high reliability when needed.
Solution Approach 2:
The patent changes transmission parameters (such as modulation and coding scheme, resource allocation, power settings) from a first set to a second set depending on whether the CSI report size exceeds the uplink channel payload capacity. This parameter transformation allows the system to maintain basic simplicity under normal conditions while achieving enhanced reliability when data size becomes problematic, directly addressing the technical contradiction.
2Reliability
If the base station configures a second set of transmission parameters with higher reliability levels, then the coverage and reliability of CSI reporting improve, but the system complexity and overhead increase
Solution Approach 1:
The patent applies partial action by implementing enhanced reliability measures (second set of transmission parameters) only when necessary, specifically when the CSI report size exceeds the uplink channel payload capacity. Instead of always using high-reliability parameters, the system selectively applies them, thus improving reliability when needed while avoiding unnecessary complexity and overhead during normal operations.
Solution Approach 2:
The base station autonomously determines when to switch between parameter sets based on monitoring channel conditions and data size, without requiring external intervention or complex coordination. This self-service mechanism allows the system to manage parameter configuration complexity internally while delivering improved reliability, resolving the contradiction between enhanced performance and system complexity.
3Adaptability or versatility
If the base station dynamically indicates transmission parameters via control messages, then the adaptability to changing link conditions improves, but the signaling overhead and processing time increase
Solution Approach 1:
The patent implements periodic monitoring and adjustment of transmission parameters, where the base station evaluates channel conditions at regular intervals and updates parameters accordingly. This periodic approach balances adaptability with timing efficiency, allowing the system to respond to changing link conditions without requiring continuous signaling, thus reducing signaling overhead and processing delays while maintaining necessary adaptability.
Solution Approach 2:
The system uses feedback mechanisms where the base station monitors the success of CSI report transmissions and adjusts transmission parameters based on this feedback. This feedback-driven adaptation allows the system to learn from actual performance and optimize parameters over time, achieving high adaptability without excessive signaling overhead since adjustments are made based on observed outcomes rather than constant control messages.
4Reliability
If the base station uses repetition mechanisms for CSI reports, then the reliability of transmission improves, but the transmission time and resource consumption increase
Solution Approach 1:
The patent applies repetition mechanisms partially, using them only when the CSI report size exceeds the uplink channel payload capacity or when channel conditions indicate poor reliability. Instead of repeating all CSI reports regardless of conditions, the system selectively applies repetition only when necessary, thus improving transmission reliability for critical reports while minimizing the additional time and resource consumption associated with repetitions.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may transmit a number of channel state information (CSI) reports for a CSI reporting procedure as part of a beam management procedure. The UE may transmit a first number of CSI reports of the CSI reporting procedure to the base station using a first set of transmission parameters associated with a first reliability level. The base station may transmit a control message to the UE indicating a second set of transmission parameters associated with a second reliability level and the UE may transmit a second number of CSI reports of the CSI reporting procedure to the base station using the second set of transmission parameters.