PSFCH Resource Configuration for Slot and Sub-Slot Collision Avoidance
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Solution Overview
Problem
The existing technologies face challenges in reducing resource collisions of PSFCH transmissions in sidelink communication systems, particularly in scenarios involving both slot-level and sub-slot-level PSSCH transmissions, which are critical for latency-sensitive applications like factory automation and automatic driving.
Innovation Solution
A method for determining PSFCH resources by configuring UE with first and second configuration information in the time and frequency domains, including parameters such as time offsets, periods, minimum gaps, PRB feedback lists, and resource patterns, to allocate specific PSFCH resources based on PSSCH transmission types, ensuring efficient resource utilization and collision avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PSFCH resources are allocated without differentiated configuration for different PSSCH transmission types, then resource allocation is simple, but resource collisions occur between slot-level and sub-slot-level transmissions
Solution Approach 1:
The patent segments PSFCH resource configuration into separate parameter sets for slot-level PSSCH transmissions and sub-slot-level PSSCH transmissions. Each transmission type has its own dedicated configuration parameters including time offset, period, and minimum gap, allowing independent optimization and collision avoidance between different transmission types without interfering with each other
Solution Approach 2:
The patent applies local quality by configuring PSFCH resources with transmission-type-specific parameters tailored to each PSSCH transmission type's characteristics. Slot-level transmissions receive configurations optimized for their timing requirements, while sub-slot-level transmissions receive configurations optimized for their lower latency requirements, ensuring each type gets appropriate local resource quality
2Manufacturing precision
If PSFCH resources are configured with fine-grained parameters for each PSSCH transmission type, then resource allocation precision is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic PSFCH resource configuration where parameters such as time offset, period, and minimum gap are adjusted based on the detected PSSCH transmission type. The system dynamically selects appropriate parameter sets from predefined configurations, enabling precise resource allocation that adapts to different transmission scenarios without requiring static complex configurations for all cases
Solution Approach 2:
The patent changes key parameters (time offset, period, minimum gap) based on PSSCH transmission type detection. When slot-level PSSCH is detected, one set of parameter values is applied; when sub-slot-level PSSCH is detected, another set is applied. This parameter change mechanism enables precise resource allocation while maintaining manageable system complexity through standardized parameter sets
3Reliability
If separate PSFCH resources are allocated for slot-level and sub-slot-level PSSCH transmissions, then resource collision is reduced, but resource utilization efficiency decreases
Solution Approach 1:
The patent employs periodic PSFCH resource allocation with configured periods for different transmission types. Slot-level PSSCH transmissions use PSFCH resources with longer periods appropriate for their timing structure, while sub-slot-level transmissions use PSFCH resources with shorter periods matching their lower latency requirements. This periodic action enables efficient resource reuse while preventing collisions through proper period alignment
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatuses for physical sidelink feedback channel (PSFCH) transmission. According to an embodiment of the present disclosure, a user equipment (UE) can include: a processor configured to: obtain first configuration information indicating PSFCH resources in the time domain, wherein the first configuration information includes at least one set of parameters associated with at least one physical sidelink shared channel (PSSCH) transmission type, wherein each set of parameters includes at least one of: a time offset, a period, or a minimum gap; obtain second configuration information indicating PSFCH resources in the frequency domain, wherein the second configuration information includes at least one of: physical resource block (PRB) feedback list(s) available for PSFCH transmission(s); number(s) of PRBs for PSFCH transmission(s); resource pattern(s) for PSFCH transmission(s); or resource mapping type(s) for PSFCH transmission(s); and determine at least one PSFCH resource for an intended PSFCH transmission based on the first configuration information, the second configuration information, and a PSSCH transmission associated with the intended PSFCH transmission; a transmitter coupled to the processor and configured to transmit the intended PSFCH transmission on the determined at least one PSFCH resource; and a receiver coupled to the processor.