PUCCH Resource Configuration for URLLC Signaling Overhead
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Solution Overview
Problem
Current PUCCH resource configuration methods for ultra-reliable and low latency communication (URLLC) services face challenges in balancing flexibility and radio resource control (RRC) signaling overhead, with configurations either resulting in excessive signaling overhead or reduced flexibility due to uniform resource allocation across sub-slots.
Innovation Solution
A wireless communication method where a network device transmits information indicating a PUCCH resource configured in a slot with multiple sub-slots, including a starting offset relative to the sub-slot boundary, allowing terminal devices to determine suitable PUCCH resources for each sub-slot, thereby optimizing flexibility and reducing RRC signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a corresponding PUCCH resource is configured for each sub-slot with unique ID, then flexibility in PUCCH resource configuration is improved, but RRC signaling overhead increases greatly
Solution Approach 1:
The patent merges multiple sub-slot configurations into a single slot-level PUCCH resource configuration. Instead of configuring separate PUCCH resources for each sub-slot, the invention configures one PUCCH resource per slot that can serve multiple sub-slots, thereby reducing RRC signaling overhead while maintaining the ability to support URLLC services across different sub-slots within the slot.
Solution Approach 2:
The configured PUCCH resource is designed to be universal and can be used by multiple sub-slots within a slot. The single PUCCH resource configuration serves multiple sub-slots, making it multi-functional. This approach allows the same PUCCH resource to handle uplink control information from different sub-slots, reducing the need for separate configurations.
2Quantity of substance
If a uniform PUCCH resource is configured for all sub-slots, then RRC signaling overhead is reduced, but flexibility in PUCCH resource configuration decreases
Solution Approach 1:
The patent applies local quality by allowing different PUCCH resource configurations for different slots, while within each slot, a uniform configuration is used. This means that while the configuration is uniform at the sub-slot level within a slot (reducing overhead), it can vary at the slot level (maintaining flexibility). Each slot can have its own PUCCH resource configuration parameters, providing adaptability without excessive signaling.
3Quantity of substance
If PUCCH resource configuration is done with slots as boundaries, then RRC signaling overhead is reduced, but the ability to support low latency URLLC services is compromised
Solution Approach 1:
The patent segments the slot into multiple sub-slots for the purpose of PUCCH resource allocation timing. By introducing sub-slot concepts in the timing domain, the system can allocate PUCCH resources more granularly and efficiently. This segmentation allows URLLC services to use earlier PUCCH resources within a slot, reducing latency while maintaining slot-level configuration simplicity that keeps signaling overhead low.
Data Source
AI summary
A wireless communication method and apparatus, and a communication device are provided. The method includes the following. A network device transmits first information to a terminal device, where the first information is used for indicating a physical uplink control channel (PUCCH) resource configured in a first slot, the first slot includes multiple sub-slots, and the first information includes a starting offset of the PUCCH resource relative to a boundary of the sub-slot.