NR Sidelink Inter-UE Coordination via Dynamic Resource Allocation
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Solution Overview
Problem
Current NR Sidelink systems face limitations in supporting coordinated resource allocation and power management, particularly in mixed-type coordination scenarios, which hinder efficient inter-UE operation for scheduling and resource allocation, leading to higher latency and increased power consumption.
Innovation Solution
An apparatus and method that evaluate the coordination type of multiple devices, determine dedicated or shared transmission and reception resources, and select resources based on the coordination type, enabling flexible resource allocation and power management through sensing and assistance mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If centralized coordination is used where one node coordinates multiple UEs, then coordination capability is provided, but support for SL-based scheduling in a coordinated manner is limited
Solution Approach 1:
The patent segments the centralized coordination function into distributed inter-UE coordination, where coordinating UEs and assisted UEs operate autonomously in groups. This divides the monolithic centralized system into smaller, manageable units that can independently perform SL-based scheduling coordination.
Solution Approach 2:
The patent introduces coordination signaling as an intermediary mechanism between coordinating UEs and assisted UEs. This signaling framework enables coordinated resource allocation without requiring direct centralized control, facilitating SL-based scheduling through structured information exchange.
2Ease of operation
If sensing and resource selection are performed without coordination signaling, then autonomous operation is enabled, but coordination of information to enhance sensing and resource selection is lacking
Solution Approach 1:
The patent implements feedback mechanisms through coordination signaling where assisting UEs provide information about sensed resources and channel conditions to coordinating UEs. This feedback loop enhances the autonomous sensing process by incorporating coordinated information about resource availability and interference conditions.
Solution Approach 2:
The patent enables preliminary coordination actions where coordinating UEs pre-evaluate resource pools and prepare coordination signaling before actual resource selection occurs. This preliminary preparation enhances subsequent autonomous resource selection by providing advance information about suitable resources.
3Adaptability or versatility
If mixed type coordination is implemented with scheduled and assisted UEs, then coordination flexibility is improved, but mechanisms to support and enable mixed type coordination are needed
Solution Approach 1:
The patent implements dynamic roles where UEs can switch between coordinating and assisted functions based on current conditions and capabilities. This dynamic assignment allows the system to adapt coordination flexibility to varying scenarios without requiring complex static configuration for each UE role.
Solution Approach 2:
The patent designs the coordination mechanism to be universal, where any UE can potentially function as either a coordinating UE or an assisted UE depending on the situation. This multi-functionality approach enables mixed type coordination without requiring specialized hardware or complex role-specific mechanisms.
4Reliability
If multi-type coordination signaling is received, then higher reliability and lower latency are enabled, but handling complexity increases
Solution Approach 1:
The patent segments multi-type coordination signaling into distinct information elements and message types that can be independently processed. This segmentation allows receiving UEs to handle only the relevant signaling types for their specific role and scenario, reducing overall handling complexity while maintaining high reliability through comprehensive coverage.
Data Source
AI summary
The present application describes an apparatus including a non-transitory memory including instructions stored thereon. The apparatus also includes a processor operably coupled to the non-transitory memory configured to execute a set of instructions. The instructions include sensing plural devices in a group to provide sidelink coordination. The instructions also include evaluating a coordination type of each of the plural devices, where the coordination type is scheduled and/or assisted. The instructions also include obtaining transmission and reception resources for the plural devices. The instruction further include determining the transmission and reception resources are dedicated or shared among the plural devices based on the coordination type. The instructions even further include determining a signaling type for each of the plural devices based on the coordination type.