PUCCH Resource Separation for Aperiodic CSI and HARQ-ACK
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Solution Overview
Problem
Existing communication technologies in NR Rel-16 lack a specific transmission scheme for aperiodic channel state information (CSI) on short physical uplink control channels (PUCCH), limiting flexibility and impacting HARQ-ACK detection performance when aperiodic CSI reporting is triggered.
Innovation Solution
The method involves independently configuring separate transmission resources for aperiodic CSI and hybrid automatic repeat request acknowledgement (HARQ-ACK) by determining distinct feedback timings and PUCCH resources, ensuring they do not overlap in time domain, thereby allowing independent transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single PUCCH resource is used for both HARQ-ACK and aperiodic CSI transmission, then device complexity is reduced, but transmission reliability deteriorates due to potential content conflicts and missed detection impacts
Solution Approach 1:
The patent divides the transmission resource into two separate PUCCH resources: one dedicated for HARQ-ACK transmission and another for aperiodic CSI transmission. This segmentation allows independent transmission and reception of the two types of information, eliminating content conflicts and ensuring that missed detection of aperiodic CSI triggering DCI does not impact HARQ-ACK content, thereby resolving the reliability issue while maintaining manageable device complexity through structured resource allocation.
2Reliability
If separate PUCCH resources are configured for HARQ-ACK and aperiodic CSI, then transmission reliability is improved, but device complexity increases due to additional resource configuration and management
Solution Approach 1:
The patent implements segmentation by configuring separate PUCCH resources for HARQ-ACK and aperiodic CSI, which improves transmission reliability by eliminating content conflicts. The complexity is managed through systematic resource indication mechanisms where the DCI contains separate resource indication fields for each transmission type, allowing the network to control and optimize the configuration without excessive complexity.
Solution Approach 2:
The patent employs a unified resource indication mechanism where the DCI structure can accommodate both HARQ-ACK and aperiodic CSI resource indications using similar field formats. This multi-functional approach allows the same indication mechanism to serve multiple purposes, reducing the overall system complexity despite having separate transmission resources.
3Productivity
If aperiodic CSI and HARQ-ACK are transmitted in the same slot using the same resource, then transmission efficiency is improved, but measurement precision deteriorates due to overlapping time domain resources causing content conflicts
Solution Approach 1:
The patent segments the time domain resources by configuring separate PUCCH resources for HARQ-ACK and aperiodic CSI transmissions. This prevents overlapping time domain resources and eliminates content conflicts that would otherwise degrade CSI reporting accuracy. The segmentation maintains transmission efficiency through proper resource scheduling while ensuring measurement precision by providing dedicated resources for each transmission type.
Solution Approach 2:
The patent resolves resource conflicts by transitioning from a single shared resource to multiple resources differentiated in the time domain dimension. By allocating different time slots or symbols within the slot structure for HARQ-ACK and aperiodic CSI, the patent eliminates overlaps while maintaining overall transmission efficiency through optimized resource utilization across the time dimension.
Data Source
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AI summary
This disclosure provides an information transmission method, a terminal and a network device, to solve the problem that there is no relevant solution as to how to transmit CSI in the case that the use of downlink DCI to trigger the transmission of aperiodic CSI on the PUCCH is supported. The information transmission method includes: receiving downlink DCI, wherein the downlink DCI includes an aperiodic channel state information CSI trigger information field; when the aperiodic CSI trigger information field indicates that aperiodic CSI is to be reported, determining a first transmission resource for the aperiodic CSI and a second transmission resource for an HARQ-ACK corresponding to the downlink DCI; transmitting the aperiodic CSI on the first transmission resource, and transmitting the HARQ-ACK on the second transmission resource.