Sidelink Reference Signal Mapping for Positioning Without Data Interference
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Solution Overview
Problem
Existing positioning technologies face challenges in achieving high-precision indoor location due to signal blocking, and current satellite-based systems struggle to meet the requirements of applications like self-driving, especially in outdoor scenarios, where precision is limited to 5-10 meters.
Innovation Solution
A communication method and apparatus that utilize a sidelink (SL) between devices for positioning, where a new terminal apparatus sends a reference signal based on a transmission parameter that associates the quantity of resources for the reference signal with data transmission, minimizing decoding errors and impact on data transmission by puncturing and mapping resources appropriately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reference signal is transmitted in a shared resource pool supporting both legacy and new terminal apparatuses, then sidelink positioning capability is enabled, but data transmission reliability deteriorates due to resource puncturing
Solution Approach 1:
The shared resource pool is segmented into dedicated reference signal resources and data transmission resources through configuration parameters. The network device configures specific time-frequency resources for reference signals separately from data resources, allowing new terminal apparatuses to perform positioning while legacy terminal apparatuses continue data transmission without interference, thus resolving the contradiction between enabling positioning and maintaining data reliability
Solution Approach 2:
The network device acts as an intermediary to manage resource allocation in the shared resource pool. It configures and signals resource allocation information to both legacy and new terminal apparatuses, coordinating their usage of the shared resources. This intermediary management ensures that reference signal transmission and data transmission coexist harmoniously, preventing decoding errors while enabling positioning functionality
2Measurement precision
If the quantity of resources for reference signal transmission is increased, then positioning precision is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The quantity of resources for reference signal transmission is made dynamic through configuration parameters that can be adjusted based on positioning requirements and data traffic conditions. The network device can flexibly allocate resource quantities for reference signals versus data transmission, optimizing the balance between positioning precision and data efficiency according to actual network conditions, rather than using fixed resource allocation
Solution Approach 2:
Configuration parameters control the quantity and distribution of reference signal resources in the shared resource pool. By adjusting these parameters, the system can change the resource allocation ratio between positioning and data transmission, enabling dynamic optimization of positioning precision while minimizing impact on data transmission efficiency based on varying operational requirements
Data Source
AI summary
A communication method and apparatus are provided, to transmit a reference signal used for sidelink positioning between terminal apparatuses, to support a sidelink positioning technology. The first configuration information indicates a transmission parameter of a reference signal used for sidelink positioning. The transmission parameter indicates a quantity of resources for transmitting the reference signal, and the quantity of resources for transmitting the reference signal is associated with a quantity of resources for transmitting data. The first terminal apparatus sends the reference signal based on the transmission parameter.