PUCCH Resource Prioritization for Overlapping CSI Reports
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Solution Overview
Problem
In new radio (NR) mobile communications systems, overlapping physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmissions lead to conflicts, resulting in unreasonable prioritization and discarding of channel state information (CSI) reports, particularly when these channels overlap on different carriers, lacking a clear method for reasonable CSI transmission.
Innovation Solution
An information transmission method that, when resource overlapping occurs, transmits CSI reports based on a multi-CSI-physical uplink control channel-resource list if the channels are both PUCCH, or discards the PUCCH and transmits the PUSCH if they are on different carriers, ensuring efficient CSI report transmission by prioritizing higher-priority reports and avoiding unnecessary discarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE discards lower-priority CSI reports when PUCCH resources overlap, then the transmission reliability of high-priority CSI is improved, but higher-priority CSI reports may still be discarded due to resource conflicts, resulting in loss of information
Solution Approach 1:
The patent introduces a new dimension for resource allocation by configuring multiple PUCCH resources (first PUCCH resource and second PUCCH resource) with different priorities. When resource overlap occurs, the UE can select appropriate resources from different dimensions (priority levels) rather than simply discarding reports, thus preventing loss of high-priority CSI while ensuring reliable transmission.
Solution Approach 2:
The patent changes the parameter of PUCCH resource configuration by introducing priority levels and associating different PUCCH resources with different priority levels. This parameter change enables the UE to make informed decisions about which CSI reports to transmit based on the priority of available resources, preventing the discarding of high-priority reports.
2Productivity
If the UE multiplexes all CSI reports on one PUCCH resource, then the quantity of transmitted CSI reports is increased, but the transmission reliability of individual CSI reports deteriorates due to resource conflicts and discarding
Solution Approach 1:
The patent segments the PUCCH resources into multiple resources with different priority levels (first PUCCH resource and second PUCCH resource). Instead of multiplexing all CSI reports on a single resource, the UE can segment the transmission by selecting appropriate resources based on CSI priority, thus maintaining both high quantity and high reliability of transmissions.
Solution Approach 2:
The patent introduces priority level parameters for PUCCH resources, enabling the UE to match CSI report priorities with appropriate PUCCH resources. This parameter change allows the system to achieve both high productivity (transmitting multiple reports) and high reliability (ensuring high-priority reports use high-priority resources).
3Adaptability or versatility
If PUCCH and PUSCH transmissions overlap on different carriers, then the system supports flexible carrier aggregation, but there is no clear method for transmitting CSI, leading to unreasonable discarding of CSI reports
Solution Approach 1:
The patent introduces priority level parameters and resource association rules that provide clear guidance for CSI transmission in carrier aggregation scenarios. By defining which PUCCH resources correspond to which carriers and priorities, the patent makes the CSI transmission method unambiguous while maintaining the flexibility of carrier aggregation.
Solution Approach 2:
The patent introduces configured PUCCH resources as intermediaries between the physical channels (PUCCH/PUSCH) and the CSI reports. These intermediary resources provide clear rules for resolving conflicts in carrier aggregation scenarios, making the transmission method explicit while preserving system flexibility.
Data Source
AI summary
An information transmission method and a terminal are disclosed. The method includes: when resource overlapping occurs between a first CSI report and a second CSI report, performing the following operations: if a physical channel corresponding to the first CSI report is a physical uplink control channel PUCCH, a physical channel corresponding to the second CSI report is a PUCCH, and a multi-CSI-physical uplink control channel-resource list is configured, transmitting the CSI reports with overlapping resources based on a resource in the multi-CSI-physical uplink control channel-resource list; and/or, if a physical channel corresponding to the first CSI report is a PUCCH, a physical channel corresponding to the second CSI report is a physical uplink shared channel PUSCH, and the PUCCH and the PUSCH are transmitted on different carriers, discarding the PUCCH and the CSI report carried on the PUCCH, and transmitting the PUSCH and the CSI report carried on the PUSCH.