Sidelink Positioning via Anchor Terminals
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Solution Overview
Problem
Current positioning technologies, such as Uu-based positioning, may fail to meet accuracy requirements or be unsuccessful, particularly in scenarios with limited network devices, necessitating the use of sidelink-based positioning to enhance positioning precision and flexibility.
Innovation Solution
A method and apparatus for a network device to instruct terminal devices to perform sidelink-based positioning procedures, utilizing sidelink-based direct discovery, resource allocation, and reference signal patterns to refine or validate position information, involving the selection and utilization of anchor terminal devices with known positions for improved positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Uu-based positioning is used, then network infrastructure utilization is high, but positioning accuracy requirements cannot be met in scenarios with limited network devices
Solution Approach 1:
The patent introduces terminal devices as intermediaries to perform positioning functions. Instead of relying solely on network devices for positioning, terminal devices execute positioning procedures using sidelink communication, thereby adapting to scenarios with limited network infrastructure while maintaining positioning accuracy through peer-to-peer measurement and calculation.
Solution Approach 2:
Terminal devices perform positioning procedures autonomously using sidelink-based methods. The terminal devices independently execute discovery procedures, measure reference signals, and calculate positions without requiring continuous network device involvement, enabling self-service positioning that adapts to various network conditions.
2Measurement precision
If sidelink-based positioning is implemented, then positioning flexibility and accuracy are improved, but system complexity increases
Solution Approach 1:
The positioning procedure is segmented into distinct phases: discovery procedure phase for identifying anchor terminal devices, measurement phase for collecting reference signal information, and position calculation phase for computing final positions. This segmentation simplifies the overall complex sidelink-based positioning process by breaking it down into manageable, standardized steps.
Solution Approach 2:
The patent performs preliminary actions by first establishing discovery procedures and identifying anchor terminal devices with known positions before executing the actual positioning measurements. This preliminary setup organizes the complex positioning process and prepares necessary information in advance, reducing the complexity of subsequent positioning operations.
3Reliability
If multiple positioning procedures are executed, then positioning reliability is improved, but time consumption increases
Solution Approach 1:
The patent executes positioning procedures partially by utilizing only the necessary number of anchor terminal devices and measurement steps required to achieve reliable positioning. Instead of performing exhaustive measurements with all possible terminal devices, the system selectively engages anchor devices with known positions to obtain sufficient accuracy, thereby reducing time consumption while maintaining reliability.
Solution Approach 2:
The system incorporates feedback mechanisms where terminal devices report positioning results and measurement data back to the network. This feedback enables the network to validate positioning accuracy and adjust the number of procedures executed, stopping early when sufficient reliability is achieved, thus reducing overall time consumption.
Data Source
AI summary
A computer-implemented method for transmitting information. The method includes: transmitting, by a network device, a first information to a first terminal device, the first information instructing the first terminal device to perform at least one sidelink-based positioning procedure associated with at least one further terminal device, receiving second information from at least one of a) the first terminal device and b) the at least one further terminal device, the second information characterizing at least one result of the at least one sidelink-based positioning procedure.