Sidelink Positioning Grants for Low-Latency Multi-UE Resource Allocation
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Solution Overview
Problem
Existing sidelink positioning systems face challenges in efficiently and reliably allocating resources for simultaneous sidelink positioning reference signal transmissions among multiple user equipments, particularly in scenarios requiring precise latency and accuracy, such as vehicle-to-everything (V2X) communications.
Innovation Solution
Implementing collective configured grants (CCGs) for sidelink positioning, which are collectively scheduled by higher layers and activated/deactivated based on link conditions, allowing orthogonal sidelink positioning reference signal transmissions with fine-grained resource management among user equipments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic resource allocation is used for sidelink positioning, then resource flexibility is improved, but resource allocation latency and complexity increase
Solution Approach 1:
The network configures multiple resource pools in advance for different positioning scenarios. When sidelink positioning is needed, the pre-configured resource pools can be immediately activated without dynamic allocation delays, thus resolving the contradiction between flexibility and latency.
Solution Approach 2:
The system dynamically selects from pre-configured resource pools based on current positioning requirements. This allows the system to maintain flexibility by adapting to different scenarios while avoiding the latency of dynamic resource allocation, as the resources are already prepared.
2Productivity
If multiple user equipments transmit sidelink positioning reference signals simultaneously, then positioning efficiency is improved, but resource collision and interference increase
Solution Approach 1:
The system divides available resources into multiple separate resource pools, each dedicated to specific positioning scenarios or groups of user equipments. This segmentation allows simultaneous transmissions without collisions, as different groups use different resource pools, thus maintaining high positioning efficiency while avoiding interference.
Solution Approach 2:
Different resource pools are allocated with different characteristics (time, frequency, spatial resources) tailored to specific positioning scenarios. This local optimization ensures that simultaneous transmissions in different pools do not interfere with each other, enabling efficient parallel positioning operations.
3Reliability
If configured grants are used for sidelink transmission, then resource allocation reliability is improved, but resource utilization flexibility decreases
Solution Approach 1:
The configured grant mechanism is extended to support multiple positioning scenarios through multiple resource pools. Each pool can be activated based on the specific scenario requirements, making the configured grant system universally applicable to different positioning needs while maintaining reliability and flexibility.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for resources to be managed by a scheduling entity. One method may include receiving, from a resource scheduling entity, at least one configured grant for sidelink transmission among a plurality of user equipments via high-layer signaling, and utilizing at least one resource within the at least one configured grant for sidelink transmission based on at least one indication by at least another user equipment activating or deactivating the at least one resource.