Sidelink Resource Pattern Configuration for Latency Reduction
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Solution Overview
Problem
Current sidelink communication systems face inefficiencies in resource usage and latency due to slot-based reservations, particularly when multiple UEs contend for resources, leading to increased signaling overhead and failure to meet latency thresholds.
Innovation Solution
Implementing multiple resource patterns within a slot, where UEs can determine or be assigned resource patterns indicating time and frequency resources for sidelink communications, allowing for flexible and granular resource allocation across transmission time intervals, reducing signaling overhead and improving latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If slot-based resource reservation is used for sidelink communication, then the system structure is simple and easy to implement, but resource usage efficiency deteriorates and communication latency increases
Solution Approach 1:
The patent divides the slot-based resource reservation into finer-grained sub-slot based resource patterns. Instead of reserving resources at the slot level, the system uses sub-slots (e.g., first sub-slot, second sub-slot, third sub-slot, fourth sub-slot) within each slot, allowing more precise time allocation. This segmentation enables multiple UEs to share resources more efficiently while maintaining implementation simplicity through pattern-based configuration.
2Quantity of substance
If slot-based resource reservation is used for sidelink communication, then the signaling overhead is low, but multiple UEs cannot efficiently share resources and latency thresholds are not met
Solution Approach 1:
The patent introduces dynamic resource pattern configuration where UEs can be assigned different resource patterns (first pattern, second pattern, third pattern, fourth pattern) based on their specific needs and channel conditions. Each pattern defines different sub-slot allocations, allowing the system to adapt to varying latency requirements and resource sharing needs dynamically, thereby meeting latency thresholds while managing signaling overhead through structured pattern definitions.
3Productivity
If multiple resource patterns are configured within a slot, then resource usage efficiency and latency performance improve, but the system complexity increases
Solution Approach 1:
The patent manages system complexity by parameterizing resource patterns through configurable parameters such as resource pattern indices, sub-slot offsets, and frequency resource allocations. Instead of defining complex resource allocation algorithms, the system uses parameter-based pattern definitions (e.g., pattern 1: sub-slots 0-1, pattern 2: sub-slots 2-3, etc.) that can be efficiently processed by UEs. This parameterization approach maintains high resource usage efficiency while keeping the implementation complexity manageable through standardized pattern configurations.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for a configuration of multiple resource patterns for one or more user equipments (UEs) to use for transmission of sidelink signals over a quantity of transmission time intervals (TTIs) (e.g., sub-slots) within a slot. For example, a UE may determine a resource pattern to use for transmitting sidelink signals based on an assignment from a network entity, an initial frequency offset, information included in control signaling, or any combination thereof. In some examples, the UE may transmit, via the sidelink channel, an indication of the resource pattern used by the UE, such that other UEs in the system may determine the resource pattern used by the UE. The UE may transmit a sidelink signal in accordance with the resource pattern, while other UEs may use other resource patterns for sidelink transmissions within the same slot.