CSI Priority Multiplexing for Aperiodic Reporting
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently managing channel state information (CSI) reporting, especially for aperiodic CSI, which affects latency and reliability in ultra-reliable low latency communications (URLLC) and other high-reliability services.
Innovation Solution
The implementation of CSI priority and multiplexing for aperiodic CSI reporting, where user equipment (UE) receives a CSI report configuration to transmit multiple CSI reports on the same uplink resource, prioritizing and multiplexing them based on report prioritization rules, allowing implicit triggering by downlink control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple CSI reports are transmitted on the same uplink resource without prioritization, then the quantity of CSI information reported increases, but the reliability and latency performance deteriorates due to resource conflicts and outdated channel state information
Solution Approach 1:
The patent segments CSI reports into different priority levels (first priority, second priority, third priority) based on their association with different uplink resources. This segmentation allows the system to handle multiple CSI reports with differentiated treatment, ensuring that critical CSI information receives appropriate resources while managing overall system complexity through structured organization.
Solution Approach 2:
The patent introduces a priority parameter for CSI reports that changes based on the type of uplink resource (e.g., PUCCH versus PUSCH, or different PUSCH configurations). This parameter change mechanism enables dynamic prioritization where CSI reports associated with higher priority uplink resources receive preferential treatment in terms of transmission timing and resource allocation, improving reliability without requiring complete reconfiguration of the system.
2Reliability
If aperiodic CSI reporting is implemented to provide up-to-date channel state information, then the reliability improves, but the latency increases due to explicit triggering overhead and processing time
Solution Approach 1:
The patent configures multiple uplink resources in advance for CSI reporting, including both periodic and aperiodic resources, before channel conditions change. When channel state needs reporting, the UE can immediately utilize the pre-configured high-priority aperiodic resources without waiting for explicit triggering or resource allocation procedures, thereby reducing latency while maintaining the reliability benefits of aperiodic reporting.
3Productivity
If CSI reports are multiplexed on the same uplink resource to improve resource efficiency, then resource utilization improves, but the difficulty of managing resource allocation increases
Solution Approach 1:
The patent applies local quality by assigning different priority levels to different uplink resources based on their specific characteristics and purposes. For example, certain PUCCH resources or PUSCH configurations are designated as higher priority for specific types of CSI reports. This localized quality differentiation simplifies resource management by providing clear rules for which CSI reports go where, reducing the overall complexity of multiplexing decisions.
Data Source
AI summary
The present disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for channel state information (CSI) priority and multiplexing for aperiodic CSI reporting between a user equipment (UE) and a base station. The UE may receive a CSI report configuration that configures the UE to transmit a first CSI report associated with a first CSI reference signal (CSI-RS) implicitly triggered by a downlink control signal, a second CSI report associated with a second CSI-RS, or a third CSI report associated with a downlink data signal. The UE may determine that the first CSI report is scheduled to transmit on a same uplink resource as the second CSI report or the third CSI report. The UE may transmit a plurality of the first CSI report, the second CSI report or the third CSI report multiplexed on the same uplink resource based on a report prioritization.