Sidelink Positioning Reference Signal Resource Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing sidelink positioning reference signals, particularly in terms of resource allocation and multiplexing, which affects positioning accuracy and spectrum efficiency.
Innovation Solution
The proposal involves a dedicated resource pool for sidelink positioning reference signals (SL-PRS) with a comb-N SL-PRS design, allowing for flexible configuration of symbol numbers and AGC symbols, and the use of sidelink control information (SCI) to schedule SL-PRS occasions, enabling better resource utilization and positioning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink positioning reference signals are multiplexed with sidelink control channels using existing resource allocation methods, then resource utilization is achieved, but resource collisions occur and positioning accuracy deteriorates
Solution Approach 1:
The patent divides the sidelink resource pool into separate regions: one for control channels and another for positioning reference signals. This segmentation prevents resource collisions by ensuring that positioning signals and control signals occupy distinct frequency-time resources, thereby improving positioning accuracy while maintaining efficient resource utilization.
Solution Approach 2:
The patent introduces sidelink control information (SCI) as an intermediary that schedules and coordinates the allocation of positioning reference signal resources. The SCI carries resource allocation information that enables the receiving device to identify and measure positioning signals without conflicting with control channel resources, thus resolving the collision issue.
2Measurement precision
If a dedicated resource pool for sidelink positioning reference signals is implemented, then positioning accuracy and spectrum efficiency are improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent designs the dedicated sidelink positioning resource pool to be configurable and adaptable to different scenarios. The resource pool parameters (frequency location, bandwidth, time resources) can be flexibly adjusted based on network conditions and positioning requirements, allowing the same framework to serve multiple purposes while maintaining simplicity through standardized procedures.
3Productivity
If comb-N sidelink positioning reference signal design is used, then spectrum efficiency is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent applies comb-N design where positioning reference signals are placed at specific frequency intervals (every N subcarriers) within the dedicated resource pool. This creates a distinctive local pattern that improves spectrum efficiency by allowing multiple users to share the same time-frequency resources with different comb offsets, while the regular pattern actually simplifies detection through predictable frequency domain characteristics.
Data Source
AI summary
In an example, a device, with a configuration of a sidelink resource pool comprising sidelink reference signal resources, determines candidate frequency resources of sidelink control channel in a slot in the sidelink resource pool. The candidate frequency resources are determined based on one or more parameters, one or more indexes and/or one or more identities associated with a plurality of candidate sidelink reference signal resources in the slot. The device performs monitoring on the candidate frequency resources. The device receives a sidelink control information (SCI) using a first frequency resource of the sidelink control channel. The candidate frequency resources include the first frequency resource of the sidelink control channel. The device measures a sidelink reference signal on a first sidelink reference signal resource in the slot. The first sidelink reference signal resource is associated with one or more first parameters, a first index and/or a first identity determined based on the first frequency resource of the sidelink control channel.