Sidelink Positioning Resource Mapping to Avoid SCI and SL-PRS Collisions
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Solution Overview
Problem
Existing sidelink systems lack a mechanism for allocating sidelink positioning reference signal (SL-PRS) resources and sidelink control information (SCI) resources, particularly in scenarios outside network coverage where centralized network control is absent.
Innovation Solution
A method and apparatus for sidelink positioning that determines SCI and SL-PRS resources based on predefined or pre-configured mapping relationships, using higher-level signaling to allocate these resources effectively, avoiding collisions and improving positioning efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mapping relationship mechanism is introduced for SL-PRS and SCI resource allocation, then resource allocation capability is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring mapping relationships between SL-PRS resources and SCI resources before actual positioning operations. The network side device pre-establishes multiple mapping relationships including one-to-one, one-to-many, and many-to-one mappings, and configures them to terminals in advance. This allows terminals to directly use these pre-established mappings during positioning without performing complex real-time allocation decisions, thus improving resource allocation capability while keeping terminal complexity low.
Solution Approach 2:
The patent uses the network side device as an intermediary to manage and configure mapping relationships. The network side device maintains a pool of mapping relationships and selectively configures appropriate ones to terminals based on positioning requirements. This intermediary approach centralizes the complexity of managing multiple mapping relationships at the network level, allowing terminals to benefit from enhanced resource allocation capability without bearing the full complexity burden.
2Measurement precision
If multiple mapping relationships are supported for different positioning scenarios, then positioning accuracy is improved, but resource management complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the resource pool into multiple SL-PRS resource sets, each associated with specific mapping relationships. Different resource sets can be configured with different mapping characteristics suitable for different positioning scenarios (e.g., one-to-one mapping for high accuracy requirements, many-to-one for resource efficiency). This segmentation allows the system to optimize positioning accuracy for specific scenarios while managing complexity through modular resource organization.
Solution Approach 2:
The patent implements dynamic resource management by allowing the network side device to flexibly configure and switch between different mapping relationships based on actual positioning needs. The system can dynamically select appropriate mapping relationships from the pre-configured pool, adjust resource allocations in real-time, and adapt to changing positioning requirements without requiring complex terminal-side decision-making logic.
3Productivity
If mapping relationships are pre-configured by network side device, then resource allocation efficiency is improved, but network dependency increases
Solution Approach 1:
The patent applies preliminary action by having the network side device pre-configure multiple mapping relationships and resource sets before terminals need them. This advance configuration enables terminals to efficiently allocate resources during positioning operations without requiring complex real-time negotiation or decision-making. The pre-configured mappings are stored at the terminal and can be quickly activated based on positioning requirements, improving allocation efficiency while reducing real-time network dependency.
Data Source
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AI summary
Embodiments of the present disclosure provide a resource allocation method, a device and an apparatus, used for sidelink positioning. The method comprises: according to a mapping relationship between resources carrying physical sidelink control channels (PSCCHs) and sidelink positioning reference signal (SL PRS) resources, a first terminal determining a PSCCH resource and/or SL PRS resource to use.