Sidelink Positioning Reference Selection for Shared 5G NR Resources
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G NR, face challenges in efficiently supporting sidelink positioning and resource allocation for devices such as UEs, UAVs, and UACs, which are crucial for device-to-device communication and positioning accuracy.
Innovation Solution
Implementing apparatuses and methods for sidelink positioning in 5G Advanced systems, including configuring UEs to decode stage 1 and stage 2 SCI to identify resource pools for PSSCH and sidelink RS, determine synchronization and positioning reference UEs, and perform measurements, while allowing common or different resource allocations for PSSCH and sidelink RS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate resource pools are allocated for PSSCH and sidelink RS, then resource allocation flexibility is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent combines PSSCH and sidelink RS into a single resource pool, allowing both signal types to share the same time-frequency resources. This merging approach maintains resource allocation flexibility while significantly reducing device complexity and signaling overhead compared to separate resource pool management.
Solution Approach 2:
The resource pool is designed to serve multiple functions simultaneously, supporting both PSSCH data transmissions and sidelink RS positioning measurements within the same resource allocation framework. This multi-functional resource pool reduces the need for separate dedicated resources while maintaining adaptability.
2Measurement precision
If stage 1 and stage 2 SCI are decoded to identify resource pools, then resource identification accuracy is improved, but measurement time and processing overhead increase
Solution Approach 1:
The patent performs preliminary decoding of stage 1 SCI to identify the resource pool configuration before proceeding to stage 2 SCI decoding. This staged approach allows the UE to prepare resource identification in advance, improving accuracy while optimizing measurement time by only processing necessary SCI stages.
Solution Approach 2:
The SCI decoding process is segmented into two stages, where stage 1 provides coarse resource pool identification and stage 2 provides fine-grained resource allocation details. This segmentation allows progressive refinement of resource identification, balancing accuracy requirements with time constraints.
3Productivity
If common resource allocation is used for PSSCH and sidelink RS, then resource management efficiency is improved, but positioning measurement reliability may deteriorate
Solution Approach 1:
The patent implements local quality differentiation within the common resource pool by allocating specific time-frequency resources with optimized parameters for sidelink RS measurements. While the overall resource pool is shared, critical positioning resources receive enhanced protection and configuration to maintain measurement reliability despite common allocation.
Solution Approach 2:
The patent introduces an intermediary resource allocation mechanism that mediates between PSSCH data transmissions and sidelink RS positioning measurements. This intermediary layer ensures that positioning-critical resources are protected from data transmission interference, maintaining reliability while allowing efficient shared resource management.
Data Source
AI summary
Apparatuses, systems, and methods for Sidelink positioning in 5G Advanced, e.g., in 5G NR systems and beyond. A UE may determine a synchronization reference UE for performance of sidelink positioning measurements. Additionally, the UE may determine a positioning reference UE for performance of the sidelink positioning measurements. Further, the UE may perform sidelink positioning measurements, e.g., while synchronization to the synchronization reference UE and/or while using the positioning reference UE to aid in determining a location of the UE. The positioning reference UE may always be the synchronization reference UE and the synchronization UE may not always be the positioning reference UE. In some instances, the positioning reference UE and the synchronization reference UE may be the same UE or the positioning reference UE and the synchronization reference UE may be different UEs.