Uplink Control Information Transmission on Overlapping PUCCH Resources
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Solution Overview
Problem
In the 5G NR system, there is no definite method for transmitting Uplink Control Information (UCI) when transmission resources for different UCI overlap in the time domain, leading to potential system operation issues.
Innovation Solution
A method for determining and transmitting UCI simultaneously on overlapping transmission resources, allowing for simultaneous transmission of multiple UCI types such as HARQ-ACK, CSI, and SR on shared or specific resources, ensuring consistent and efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate PUCCH resources are configured for different UCI types, then each UCI can be transmitted reliably, but transmission resource overlap occurs in the time domain causing undefined behavior
Solution Approach 1:
The patent merges multiple PUCCH resources that overlap in the time domain into a single transmission resource. When the terminal determines that first PUCCH resources for first UCI and second PUCCH resources for second UCI overlap in the time domain, it selects one resource from the overlapping set and transmits both UCIs on that single resource, thereby resolving the resource overlap issue while maintaining transmission reliability.
Solution Approach 2:
The patent introduces dynamic resource selection based on overlap detection. The terminal dynamically determines whether to transmit on the first PUCCH resources or select from the second PUCCH resources based on the time domain overlap condition. This dynamic adjustment allows the system to adapt to different transmission scenarios and avoid the undefined behavior caused by static resource allocation.
2Productivity
If multiple PUCCH formats are defined for different UCI bit quantities, then transmission efficiency is improved, but resource allocation becomes more complex when resources overlap
Solution Approach 1:
The patent performs preliminary detection of resource overlap before transmission. The terminal first determines whether the first PUCCH resources and second PUCCH resources overlap in the time domain, and based on this preliminary assessment, it decides the transmission strategy. This preliminary action simplifies the subsequent resource selection process by providing clear decision criteria.
Solution Approach 2:
The patent changes the resource selection parameter based on the overlap condition. When overlap is detected, the terminal changes from using the originally configured first PUCCH resources to selecting from the second PUCCH resources. This parameter change allows the system to maintain simple operation while adapting to the overlapping resource scenario.
3Stability of the object's composition
If transmission opportunities are determined by pre-configured periodicity and offset, then transmission timing is standardized, but conflicts arise when multiple UCIs have overlapping transmission opportunities
Solution Approach 1:
The patent applies preliminary anti-action by detecting and preventing the harmful effect of resource overlap before transmission occurs. The terminal detects the overlap between first PUCCH resources and second PUCCH resources in advance and takes corrective action by selecting an appropriate resource from the second set, thereby preventing the potential transmission conflict and ensuring reliable UCI transmission.
Data Source
AI summary
A UCI transmission method, a UCI reception method, a terminal, a base station and devices are provided. The UCI transmission method includes: determining a first transmission resource for first UCI and second transmission resources for second UCI; and when the first transmission resource overlaps at least two second transmission resources in a time domain, transmitting the first UCI and the second UCI simultaneously on at least one of the at least two second transmission resources.