NR V2X Sidelink Configured Grants for Lower-Latency Allocation
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Solution Overview
Problem
Existing sidelink communication methods in V2X scenarios face inefficiencies in resource allocation, particularly in mode-1 operations where base stations dynamically schedule resources, leading to suboptimal performance in scenarios like vehicle platooning, advanced driving, and extended sensing.
Innovation Solution
A method for user equipment (UE) to utilize configured grant (CG) resources allocated by a base station, including information on the period, time domain, frequency domain, and time offset, enabling efficient sidelink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If base station dynamically schedules resources in mode-1 operation, then resource allocation flexibility is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring resource pools and allocation parameters before actual communication occurs. The base station pre-establishes resource pools with defined characteristics, and UEs pre-select appropriate pools based on predicted needs, eliminating the need for dynamic real-time scheduling and improving overall allocation efficiency.
Solution Approach 2:
The patent implements dynamics by enabling UEs to dynamically switch between different resource pools based on varying communication conditions. The system maintains multiple pre-configured resource pools with different characteristics, allowing flexible adaptation to different scenarios (e.g., vehicle platooning, V2X communication) without requiring base station intervention for each specific allocation decision.
2Adaptability or versatility
If dynamic resource scheduling is used, then adaptability to different scenarios is improved, but latency increases
Solution Approach 1:
The patent reduces latency by performing resource selection and pool configuration in advance. UEs pre-identify suitable resource pools based on their communication needs and select from pre-prepared options, eliminating the time-consuming dynamic scheduling process and enabling faster resource allocation while maintaining scenario adaptability.
Solution Approach 2:
The patent employs copying by creating multiple copies of resource pools with different characteristics (e.g., different time frequencies, resource block configurations). UEs can quickly switch between these pre-copied pools depending on current needs, avoiding the delay of creating or configuring resources on-the-fly while preserving adaptability to various communication scenarios.
3Device complexity
If base station controls resource allocation, then resource management simplicity is improved, but UE autonomy deteriorates
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously select and manage resource pools without base station control. Each UE independently evaluates communication needs, selects appropriate pre-configured resource pools, and manages their own resource allocation, thereby maintaining base station simplicity while significantly improving UE autonomy and flexibility.
Solution Approach 2:
The patent applies segmentation by dividing resource management into separate functions: the base station manages the high-level configuration of multiple resource pools (maintaining simplicity), while individual UEs handle the selection and utilization of specific pools (gaining autonomy). This segmentation allows both simplicity at the network level and autonomy at the device level to coexist.
Data Source
AI summary
Proposed is a method by which a first device performs wireless communication. The method may include the steps of receiving information related to a configured grant (CG) resource from a base station; and performing sidelink transmission to a second device on the basis of the information related to the CG resource. For example, a first CG resource may be allocated after a time offset of the CG resource from a first time point. For example, a second CG resource may be allocated after the period of the CG resource from the first CG resource. For example, the period of the CG resource may be in units of logical slots.