CSI Reporting Triggering to Reduce Premature CPU Occupancy
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Solution Overview
Problem
In wireless communication systems, particularly in NR systems, the energy consumption at base stations is high due to premature occupancy of CPU resources by periodic CSI reporting, leading to inefficiencies and potential conflicts with higher priority CSI assignments.
Innovation Solution
Implementing a unified UE reporting scheme with dynamic triggering and activation of periodic CSI reporting, utilizing HARQ-ACK to determine physical layer channels, and optimizing RS resource usage to reduce redundant overhead and CPU occupancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic CSI reporting is activated without dynamic triggering, then CSI feedback is continuously provided, but CPU resources are prematurely occupied and energy consumption increases
Solution Approach 1:
The patent implements dynamic triggering of periodic CSI reporting through DCI signaling, allowing the system to adaptively activate or deactivate CSI reporting based on current channel conditions and traffic requirements. This transforms the static periodic reporting mechanism into a dynamic one that can be flexibly controlled, resolving the contradiction between maintaining reliable CSI feedback and reducing unnecessary CPU occupancy and energy consumption.
Solution Approach 2:
The patent introduces configurable parameters including reporting periodicity, reference signal periodicity, and trigger conditions that can be dynamically adjusted. By changing these parameters based on channel conditions and QoS requirements, the system optimizes the balance between CSI feedback reliability and resource consumption, preventing premature CPU occupancy while maintaining necessary feedback efficiency.
2Reliability
If periodic CSI reporting is continuously activated, then CSI feedback is always available, but CPU occupancy time increases and conflicts with higher priority CSI assignments
Solution Approach 1:
The patent implements dynamic triggering mechanisms where DCI signaling can activate or deactivate periodic CSI reporting based on current system conditions. This allows higher priority CSI assignments to preempt lower priority periodic reporting, optimizing CPU resource utilization while maintaining CSI feedback availability when needed.
Solution Approach 2:
The patent maintains periodic CSI reporting structure but introduces dynamic triggering to control when these periodic reports are actually generated and transmitted. The periodicity parameters can be configured and adjusted, allowing the system to maintain the periodic framework for reliability while using dynamic triggers to prevent unnecessary CPU occupancy and resolve conflicts with higher priority assignments.
3Use of energy by moving object
If dynamic triggering is implemented for periodic CSI reporting, then energy consumption is reduced, but system complexity increases
Solution Approach 1:
The patent leverages existing DCI signaling structures and HARQ-ACK mechanisms to implement the dynamic triggering function. By reusing established signaling frameworks rather than creating entirely new mechanisms, the patent reduces the complexity overhead while still achieving energy savings through dynamic control of periodic CSI reporting.
4Device complexity
If unified UE reporting scheme is implemented, then complexity is reduced and performance is improved, but coordination between network devices requires more precise timing
Solution Approach 1:
The patent establishes predetermined relationships between DCI timing, HARQ-ACK timing, and CSI reporting timing through configuration parameters. By pre-defining these timing relationships, the system reduces the complexity of real-time coordination while ensuring precise timing alignment is maintained, allowing unified reporting schemes to function efficiently without excessive coordination overhead.
Data Source
AI summary
In some implementations, a UE may receive a CSI report configuration (CSI-ReportConfig) to configure at least a first CSI reporting. The UE may receive a first DCI and send, via a first physical layer channel, at least the first CSI reporting in response to receiving the first DCI, where the first CSI Reporting occupies a CSI processing unit from a first symbol to a last symbol of the first physical layer channel. The first symbol is related to a reportConfigType domain in the first CSI-ReportConfig, wherein when the reportConfigType domain in the first CSI-ReportConfig is semiPersistentOnPUSCH, the first symbol is the first symbol after a PDCCH occupied by the first DCI, and when the reportConfigType domain in the first CSI-ReportConfig is periodic, the first symbol is the earliest symbol in a first occasion set.