PUCCH Resource Allocation for 5G URLLC Delay Reduction
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Solution Overview
Problem
In 5G wireless communication systems, particularly for URLLC services, existing methods face challenges in reducing transmission delay and improving reliability of Physical Uplink Control Channel (PUCCH) resources, which are not aligned with sub-slot boundaries, leading to inefficiencies in multiplexing and resource utilization.
Innovation Solution
A method that determines overlapping time-domain resources between radio resource blocks and transmits bit blocks in a third radio resource set, using multiplexing for high overlap and independent transmission for low overlap to enhance spectrum efficiency and reduce delay, while optimizing PUCCH resource allocation across sub-slot boundaries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If PUCCH resources are transmitted across sub-slot boundaries to reduce transmission delay, then flexibility and delay are improved, but resource collision and multiplexing complexity increase
Solution Approach 1:
The patent changes the time-domain parameter by allowing PUCCH resources to cross sub-slot boundaries, enabling more flexible transmission timing that reduces delay while adapting to URLLC requirements
Solution Approach 2:
The patent segments the handling of overlapping PUCCH resources by introducing separate processing paths: multiplexing for non-URLLC traffic and puncturing for URLLC traffic, thereby reducing overall system complexity while maintaining flexibility
2Productivity
If multiple HARQ-ACKs are multiplexed into a single PUCCH to improve resource utilization, then spectrum efficiency is improved, but transmission delay increases
Solution Approach 1:
The patent introduces dynamic resource allocation where the transmission method (multiplexing vs. puncturing) is dynamically selected based on traffic type and timing conditions, allowing the system to adapt between spectrum efficiency and delay performance
Solution Approach 2:
The patent introduces a scheduling mechanism as an intermediary that determines whether to multiplex or puncture PUCCH resources based on the priority and timing requirements of different traffic types, mediating between spectrum efficiency and delay trade-offs
3Speed
If PUCCH time-domain resources are narrowed for URLLC to reduce delay, then transmission speed is improved, but resource collision probability increases
Solution Approach 1:
The patent applies different resource allocation strategies to different traffic types: narrow time-domain resources for URLLC to maintain speed, and standard resources for other traffic, with priority-based conflict resolution that protects URLLC transmissions
Data Source
AI summary
The present disclosure provides a method and device in a node used for wireless communications. A first node first receives a first signal and a second signal; determines that there exists an overlapping between a first radio resource block and a second radio resource block in time domain; then transmits a first bit block and a second bit block in a third radio resource set; the first bit block and the second bit block are respectively used to indicate whether the first signal and the second signal are correctly received; the first radio resource block and the second radio resource block are respectively reserved for transmitting the first bit block and the second bit block. The application determines different transmission methods of uplink control information according to a value of K1, which reduces the impact caused by the conflict and improves the uplink transmission performance.