PUCCH Resource Selection for HARQ-ACK and UCI Transmission
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Solution Overview
Problem
In new radio communication systems, such as 5G NR, the simultaneous transmission of HARQ-ACK feedback for SPS PDSCH and other uplink control information on the PUCCH resource is limited, as the PUCCH resource for HARQ-ACK of SPS PDSCH is typically a PUCCH Format 0 or 1, which cannot carry more than 2 bits of information, preventing simultaneous transmission of other UCIs.
Innovation Solution
A method to determine and use a PUCCH resource that can carry more than 2 bits of information for transmitting HARQ-ACK of SPS PDSCH, allowing for the selection of appropriate PUCCH resources based on overlapping time domain positions with other UCI resources, ensuring simultaneous transmission without dropping any UCI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If PUCCH Format 0 or 1 resource is used for transmitting HARQ-ACK of SPS PDSCH, then the transmission resource is pre-configured and simple, but it cannot carry more than 2 bits of information, preventing simultaneous transmission of other UCIs
Solution Approach 1:
The patent introduces dynamic PUCCH resource selection based on the type of UCI being transmitted. The terminal device dynamically switches between PUCCH Format 0/1 (for simple HARQ-ACK) and PUCCH Format 2/3/4 (for multi-bit UCI including HARQ-ACK and other control information), making the system adaptable to different transmission scenarios while maintaining operational simplicity when appropriate.
Solution Approach 2:
The patent changes the PUCCH format parameter based on the transmission requirements. When simultaneous transmission of HARQ-ACK and other UCIs is needed, the system switches to PUCCH Format 2/3/4 which supports more than 2 bits, thereby resolving the contradiction between configuration simplicity and information carrying capacity.
2Productivity
If PUCCH resource for HARQ-ACK of SPS PDSCH is used for simultaneous transmission with other UCIs, then transmission efficiency improves, but the pre-configured PUCCH Format 0 or 1 resource cannot support more than 2 bits of information
Solution Approach 1:
The patent makes the PUCCH resource selection universal by establishing a mapping relationship between different UCI types and appropriate PUCCH formats. The system can handle both simple HARQ-ACK transmission (Format 0/1) and complex simultaneous UCI transmission (Format 2/3/4) using a unified resource selection mechanism, thereby achieving multi-functionality without information loss.
3Adaptability or versatility
If multiple PUCCH resources are configured for different UCI types, then simultaneous transmission is enabled, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple PUCCH resources (Format 0/1 and Format 2/3/4) in advance through higher layer signaling. The terminal device stores these pre-configured resources and selects the appropriate one based on the UCI transmission requirements, avoiding the need for complex real-time resource allocation and reducing device complexity during actual transmission.
Data Source
AI summary
A HARQ-ACK sending method, a receiving method, a terminal and a base station are provided, the HARQ-ACK sending method includes: determining one PUCCH resource for transmitting HARQ-ACK of a SPS PDSCH from at least one PUCCH resource for transmitting the HARQ-ACK of the SPS PDSCH, wherein the at least one PUCCH resource includes at least one first type of PUCCH resource, and the first type of PUCCH resource is a PUCCH resource for carrying more than 2 bits of information; and sending the HARQ-ACK of the SPS PDSCH on the determined PUCCH resource.