Sidelink Resource Slicing for D2D Service Types
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face challenges in efficiently managing resource allocation for device-to-device (D2D) communications on sidelink interfaces, leading to suboptimal performance due to the use of a shared resource pool for various service types with different requirements.
Innovation Solution
The implementation of resource slicing on sidelink interfaces, where a slice identifier is determined based on the service type, allowing for dynamic allocation and reallocation of resources to match specific service requirements, ensuring efficient use of resources for D2D communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared resource pool is used for various service types on sidelink interface, then resource allocation is simplified, but spectral efficiency and service performance deteriorate due to mismatched resource requirements
Solution Approach 1:
The shared resource pool is segmented into multiple dedicated resource pools, each corresponding to a specific service type (e.g., V2V, V2P, V2N). Each UE is allocated resources from the appropriate service-specific pool based on its communication requirements, ensuring that resources are matched to service needs while maintaining manageable allocation complexity through structured organization.
Solution Approach 2:
Different quality characteristics are assigned to different resource pools according to their service requirements. For example, V2V communication may receive resources with higher reliability parameters, while V2P may receive resources optimized for lower latency. This allows each service type to utilize resources with locally optimized qualities rather than a uniform allocation approach.
2Reliability
If service type-specific resource allocation is implemented, then spectral efficiency and service performance improve, but resource management complexity increases
Solution Approach 1:
The base station implements a universal resource management mechanism that handles multiple service types through a unified framework. The same base station processes resource allocation requests for V2V, V2P, and V2N services using consistent procedures, reducing the complexity burden on individual UEs while maintaining service-specific optimization through the multi-functional allocation system.
Solution Approach 2:
The base station acts as an intermediary between UEs and the resource pool. Instead of UEs directly managing complex resource allocation across different service types, the base station receives service type information from UEs, determines the appropriate dedicated resource pool, and allocates resources accordingly. This intermediary approach simplifies UE complexity while enabling sophisticated service-specific resource management.
3Reliability
If dedicated resource pools are allocated for different service types, then communication reliability and quality of service improve, but resource utilization efficiency may worsen due to potential underutilization of service-specific pools
Solution Approach 1:
The resource allocation system dynamically adapts to changing service demands. When a dedicated service-specific resource pool experiences underutilization, the system can dynamically reallocate those resources to other service types with higher current demand. This dynamic adjustment maintains communication reliability for priority services while improving overall resource utilization efficiency by preventing idle resources.
Solution Approach 2:
The system changes allocation parameters based on service type and demand conditions. For example, the amount of resources allocated to each service-specific pool, the priority levels, and the allocation rules can be adjusted as parameters. This allows the system to maintain high reliability for critical services like V2V while optimizing overall resource utilization by adjusting parameters in response to changing traffic patterns and service requirements.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a service type to be used by the UE for one or more device-to-device (D2D) communications on a sidelink interface; determine a slice identifier based at least in part on the service type, wherein the slice identifier corresponds to a resource allocation to be used for the one or more D2D communications; and transmit an indication of the slice identifier. Numerous other aspects are provided.