PUCCH Priority Mapping for Concurrent Unicast and MBS HARQ
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Solution Overview
Problem
In the New Radio (NR) system, there is a challenge in selecting PUCCH resources to transmit HARQ feedback information when both unicast and Multicast Broadcast Service (MBS) HARQ feedback exist simultaneously, as existing methods lack an effective solution for ensuring the transmission reliability of both types of feedback.
Innovation Solution
The method involves determining a PUCCH configuration for transmitting HARQ codebooks based on a corresponding relationship with priority information, allowing HARQ feedback for unicast and MBS to be transmitted using PUCCH resources of different priorities, ensuring reliable transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUCCH resources are shared for both unicast and MBS HARQ feedback, then resource utilization is improved, but transmission reliability deteriorates due to priority conflicts
Solution Approach 1:
The PUCCH resources are segmented into different priority levels (first priority and second priority). The terminal device determines separate PUCCH configurations for unicast HARQ feedback and MBS HARQ feedback based on priority information, ensuring that high-priority unicast feedback and lower-priority MBS feedback are transmitted on appropriately differentiated resources, thus resolving the reliability conflict while maintaining resource efficiency
Solution Approach 2:
Different PUCCH resource configurations are assigned to different types of HARQ feedback based on their priority requirements. Unicast HARQ feedback receives higher priority PUCCH resources with guaranteed transmission reliability, while MBS HARQ feedback uses lower priority resources, creating localized quality differentiation that satisfies both reliability requirements and resource utilization
2Reliability
If separate PUCCH resources are allocated for unicast and MBS HARQ feedback, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The terminal device determines PUCCH configurations by changing parameters based on priority information. The network device configures multiple PUCCH resources with different priority indicators, and the terminal selects appropriate resources by evaluating the priority parameter of each HARQ feedback type, ensuring reliable transmission while managing complexity through parameter-based resource selection
Data Source
AI summary
Disclosed are a wireless communication method and a terminal device. In the case of simultaneous presence of HARQ feedback for unicast and HARQ feedback for MBS, the HARQ feedback for the unicast and the HARQ feedback for the MBS may be transmitted on the basis of PUCCH resources having different priorities. The wireless communication method comprises: a terminal device determines, according to a first corresponding relationship, a PUCCH configuration for transmitting at least one hybrid automatic repeat request (HARQ) codebook, wherein the first corresponding relationship comprises a corresponding relationship between the PUCCH configuration and the HARQ codebook and determined on the basis of priority information, and the HARQ codebook in the at least one HARQ codebook comprises HARQ feedback information for the unicast and/or HARQ feedback information for the MBS.