CSI Report Prioritization for PUCCH Resource Collision Avoidance
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Solution Overview
Problem
Current 5G/New Radio (NR) systems face challenges in efficiently multiplexing and prioritizing periodic and semi-persistent Channel State Information (CSI) reports across multiple carriers and bandwidth parts, leading to resource inefficiencies and potential collisions during PUCCH transmission.
Innovation Solution
The proposed solution involves a method and apparatus that prioritize CSI reports based on their content and importance, allowing for the simultaneous transmission of multiple periodic or semi-persistent reports in one slot by configuring PUCCH resources and applying rules for ranking and dropping reports to ensure maximum useful information is transmitted within the available resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple CSI reports are transmitted simultaneously in one slot, then the quantity of information transmitted is improved, but the resource usage efficiency deteriorates due to potential collisions and overlapping PUCCH resources
Solution Approach 1:
The patent segments multiple CSI reports into different priority levels (first priority and second priority). High-priority reports are transmitted on designated PUCCH resources, while low-priority reports are dropped when resources overlap. This segmentation resolves the contradiction by allowing simultaneous transmission of multiple reports without resource collisions, maintaining efficiency while increasing information throughput.
Solution Approach 2:
The patent applies preliminary prioritization and resource allocation before transmission. PUCCH resources are pre-configured for different priority levels, and the system determines which reports to transmit based on priority rules before the actual transmission occurs. This preliminary action prevents resource collisions and ensures efficient usage while maximizing information transmission.
2Reliability
If PUCCH resources are allocated for multiple CSI reports, then the reliability of information transmission is improved, but the device complexity increases due to resource management and collision handling
Solution Approach 1:
The patent applies local quality by assigning different priority levels and resource allocation rules to different CSI reports based on their importance. High-priority reports receive dedicated PUCCH resources with guaranteed transmission, while low-priority reports use shared resources with drop rules. This differentiated approach ensures reliable transmission of critical information while simplifying overall resource management.
Solution Approach 2:
The patent introduces dynamic priority-based resource allocation where the system adapts resource usage based on report priority and collision conditions. When PUCCH resources overlap, the system dynamically determines which reports to transmit based on pre-defined priority rules, maintaining reliability for important reports while managing complexity through automated decision-making.
3Loss of information
If all CSI reports are transmitted without prioritization, then the completeness of information is improved, but the loss of time increases due to retransmissions and collision resolution
Solution Approach 1:
The patent performs preliminary prioritization and selection of CSI reports before transmission. By pre-determining which reports have high priority and should be transmitted, the system avoids time-consuming collision resolution and retransmissions. This ensures that the most important information is transmitted without delay, balancing completeness with time efficiency.
Solution Approach 2:
The patent extracts and transmits only the high-priority CSI reports when resource collisions occur, rather than attempting to transmit all reports equally. This extraction of critical information ensures that essential CSI data is transmitted promptly, accepting that some lower-priority information may be dropped to avoid time loss from collisions and retransmissions.
Data Source
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AI summary
In accordance with an example embodiment, there is disclosed a method comprising: receiving, by a user device, from at least one base station, at least two CSI reporting configurations for at least one of periodic and semi-persistent CSI reporting; determining that at least two CSI reports are to be reported for the at least two CSI reporting configurations in a slot; determining whether PUCCH resources for the at least two CSI reporting configurations are overlapping in time on a carrier; and ranking different CSI reports associated with each of the at least two CSI reporting configurations in a priority order in response to a determination that at least two PUCCH resources associated with the at least two CSI reporting configurations overlap in time at least partially.