Sidelink Localization Resource Allocation in Limited Coverage
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Solution Overview
Problem
There is a need to improve Sidelink localization procedures in 5G/New Radio environments, particularly in areas with reduced or no core network coverage, to efficiently allocate resources for accurate positioning without impacting user experience.
Innovation Solution
A user equipment device coordinates Sidelink communication links to calculate positioning information using resource allocation patterns optimized based on existing coverage and ongoing data transmissions, employing SL-Positioning Reference Signals and synchronization signals to ensure reliable and efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Sidelink localization procedures are implemented in areas with reduced or no core network coverage, then positioning accuracy is improved, but resource allocation complexity increases
Solution Approach 1:
The resource allocation is segmented into different types (Type 1 and Type 2) with distinct characteristics. Type 1 provides autonomous resource selection by the terminal, while Type 2 provides network-controlled allocation. This segmentation allows the system to handle positioning procedures in coverage-reduced areas by using Type 1 without requiring complex network coordination, thus improving positioning accuracy while managing resource allocation complexity.
Solution Approach 2:
The patent implements dynamic resource allocation patterns that can be configured based on coverage conditions and service requirements. The network can dynamically switch between Type 1 and Type 2 resource allocation, and adjust resource pool configurations adaptively. This dynamic approach enables the system to maintain positioning accuracy in varying coverage conditions while optimizing resource allocation complexity according to actual network capabilities.
2Measurement precision
If resource allocation is optimized for positioning, then positioning accuracy is improved, but data transmission performance may deteriorate
Solution Approach 1:
The resource pool is segmented into positioning-specific resources and data transmission resources. The patent configures separate resource pools for SL positioning reference signals and regular data transmissions, allowing positioning operations to use dedicated resources without competing with data traffic. This segmentation ensures positioning accuracy is maintained while minimizing impact on data transmission performance.
Solution Approach 2:
The patent applies local quality by allocating specific resource characteristics to positioning functions. Different resource pools are configured with parameters optimized for positioning (such as specific time-frequency patterns and signal structures), while other resources maintain characteristics optimized for data transmission. This localized optimization ensures positioning accuracy without degrading overall data transmission performance.
3Measurement precision
If Sidelink positioning resources are allocated, then positioning capability is improved, but resource availability for data transmission is reduced
Solution Approach 1:
The patent implements multi-functionality by designing resource pools that can serve both positioning and data transmission purposes under different configurations. The same physical resources can be dynamically allocated for positioning when needed and for data transmission at other times. This universal resource usage improves positioning capability while maintaining overall resource availability through flexible sharing between functions.
Solution Approach 2:
The patent employs periodic positioning resource allocation where positioning reference signals are transmitted at specific periodic intervals rather than continuously. This periodic action provides sufficient positioning capability at the required frequency while leaving resources available for data transmission during non-positioning intervals, thus balancing positioning capability with resource availability.
Data Source
AI summary
A first terminal may include a receiver that receives, from a second terminal, configuration parameters for a Sidelink (SL) localization procedure in which positioning information of the first terminal is obtained. Further, the first terminal may include a processor configured to determine, based on the configuration parameters, a resource allocation pattern to be used in an SL transmission procedure. The processor may be also configured to implement the resource allocation pattern in accordance with the SL transmission procedure to obtain the positioning information.