PUCCH Resource Selection for Multiplexing Different-Priority HARQ-ACK
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Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in handling HARQ-ACK with different priorities, which can lead to collisions and suboptimal resource allocation.
Innovation Solution
The solution involves determining separate coding and power control for HARQ-ACK with different priorities, using distinct PUCCH configurations and power control parameters to ensure efficient multiplexing and resource selection on PUCCH, allowing for higher reliability and flexibility in handling URLLC and eMBB services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate PUCCH resources are allocated for different HARQ-ACK priorities, then collision between URLLC and eMBB HARQ-ACK is avoided, but PUCCH resource configuration complexity increases
Solution Approach 1:
The PUCCH resource configuration is segmented into priority levels. High priority PUCCH resources are configured separately from low priority PUCCH resources, allowing URLLC and eMBB HARQ-ACK to be transmitted on different resources without collision. This segmentation resolves the contradiction by providing dedicated resources for each priority level, ensuring reliability while managing complexity through structured resource allocation.
Solution Approach 2:
Different PUCCH resource parameters are configured locally for different priority levels. High priority PUCCH resources have specific parameters optimized for low-latency URLLC traffic, while low priority resources are configured for eMBB traffic. This local differentiation allows each priority level to have tailored resource characteristics, improving reliability without requiring complete reconfiguration of the entire PUCCH system.
2Reliability
If differentiated power control parameters are applied to HARQ-ACK with different priorities, then transmission reliability is improved, but power control complexity increases
Solution Approach 1:
Power control parameters are differentiated locally based on HARQ-ACK priority. High priority HARQ-ACK transmissions use power control parameters optimized for reliable delivery, while low priority transmissions use different parameters. This local differentiation improves reliability by ensuring adequate power allocation for critical traffic without requiring complete redesign of the power control system.
Solution Approach 2:
Power control parameters such as P0_PUCCH and delta_PUCCH are changed based on HARQ-ACK priority level. The system dynamically adjusts these parameters according to the priority of the uplink control information being transmitted, allowing differentiated power allocation that improves reliability while maintaining manageable complexity through parameter adaptation rather than structural changes.
3Productivity
If PUCCH resource selection is based on priority differentiation, then communication efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
PUCCH resources are pre-configured and associated with specific priority levels before transmission occurs. The network configures high priority and low priority PUCCH resources in advance, and the UE selects the appropriate resource based on the priority of the HARQ-ACK to be transmitted. This preliminary configuration simplifies the actual resource selection process during transmission, improving communication efficiency while managing allocation complexity through advance planning.
Solution Approach 2:
The PUCCH resource selection process uses parameter changes based on priority differentiation. The system changes the selected PUCCH resource parameters according to the priority level of the uplink control information, allowing efficient resource allocation that adapts to different traffic requirements without requiring complex real-time allocation decisions.
Data Source
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AI summary
A user equipment (UE) is described. The UE includes a processor configured to determine a physical uplink control channel (PUCCH) resource for multiplexing hybrid automatic repeat request-acknowledgement (HARQ-ACK) with different priorities on PUCCH. The processor is also configured to multiplex the HARQ-ACK with different priorities based on the determined PUCCH resource. The UE also includes transmitting circuitry configured to transmit the multiplexed HARQ-ACK on the PUCCH.