PUCCH Resource Allocation for 5G NR Semi-Persistent Scheduling
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Solution Overview
Problem
In 5G NR systems, the introduction of Ultra-reliable low latency (URLLC) services shortens SPS periods, leading to situations where no PUCCH resource is available for some SPS PDSCH resources, causing inefficiencies in data transmission feedback.
Innovation Solution
A resource configuration method and device that determine downlink semi-persistent scheduling resources corresponding to PUCCH resources based on preset rules, ensuring a time difference and optimizing the allocation of PUCCH resources for transmitting feedback response information, thereby avoiding resource unavailability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If SPS period is shortened to support URLLC service, then service latency is reduced, but PUCCH resource availability deteriorates
Solution Approach 1:
The patent segments the correspondence relationship between SPS PDSCH resources and PUCCH resources by introducing multiple PUCCH resources that can serve multiple SPS PDSCH resources. Instead of a one-to-one mapping, multiple SPS PDSCH resources are grouped to share common PUCCH resources, ensuring resource availability even with shortened SPS periods for URLLC services.
2Measurement precision
If one PUCCH resource corresponds to one SPS PDSCH resource, then feedback accuracy is maintained, but resource efficiency deteriorates
Solution Approach 1:
The patent merges multiple SPS PDSCH resources to share common PUCCH resources. Multiple downlink semi-persistent scheduling resources are configured to correspond to the same PUCCH resource, improving resource efficiency while maintaining feedback accuracy through proper resource grouping and time difference constraints.
Solution Approach 2:
PUCCH resources are designed to serve multiple functions by being shared across multiple SPS PDSCH resources. A single PUCCH resource can provide feedback for multiple downlink resources, making the uplink control channel more versatile and efficient in handling shortened SPS periods.
3Productivity
If multiple SPS PDSCH resources share one PUCCH resource, then resource efficiency is improved, but resource configuration complexity increases
Solution Approach 1:
The patent introduces dynamic parameters such as time differences and offsets to manage the correspondence between multiple SPS PDSCH resources and shared PUCCH resources. By using dynamic time difference constraints and configurable parameters, the system can adaptively manage resource sharing without excessive complexity, allowing flexible grouping while maintaining clear resource allocation rules.
Data Source
AI summary
The present disclosure relates to a resource configuration method and apparatus, a computer device, and a storage medium. A terminal receives configuration information sent by a network device. Since the configuration information is used to indicate at least one PUCCH resource, and the at least one PUCCH resource is used to transmit feedback response information corresponding to a plurality of downlink semi-persistent scheduling resources, the terminal may send the feedback response information corresponding to the downlink semi-persistent scheduling resources on the PUCCH resource indicated by the configuration information, or a plurality of SPS resources may share one PUCCH resource, so that each downlink semi-persistent scheduling resource has a corresponding PUCCH resource that may transmit the feedback response information, thereby avoiding the circumstance in the prior art in which some downlink semi-persistent scheduling resources have no available PUCCH resources, and ensuring the quality of data transmission.