Sidelink Positioning Dual-Mode Selection for Accuracy and Response Time
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing sidelink positioning, particularly in scenarios requiring dual positioning modes for enhanced accuracy and reliability.
Innovation Solution
A method and apparatus for sidelink positioning that supports a dual positioning mode, involving a user equipment (UE) receiving a location request message, performing location measurement and calculation based on positioning reference signals, and reporting the results to a location server, which can select between UE-calculated and server-calculated location information based on quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single positioning mode is used in sidelink positioning, then the system complexity is reduced, but the positioning accuracy and reliability are insufficient
Solution Approach 1:
The positioning system is segmented into two distinct modes: UE-based positioning mode and UE-assisted positioning mode. Each mode is independently defined with specific measurement and calculation procedures, allowing the system to select the appropriate mode based on requirements without managing a complex unified framework.
Solution Approach 2:
The system dynamically switches between UE-based and UE-assisted positioning modes based on operational requirements, network conditions, and performance needs. This dynamic selection enables the system to adapt to different scenarios while maintaining manageable complexity through clear mode definitions.
2Reliability
If dual positioning modes are supported, then positioning accuracy and reliability are enhanced, but the system complexity increases
Solution Approach 1:
The positioning functionality is divided into two reliable modes with distinct characteristics: UE-based mode for autonomous positioning and UE-assisted mode for network-supported positioning. This segmentation ensures that each mode can be optimized for specific reliability requirements without compromising the other.
Solution Approach 2:
The system changes operational parameters such as measurement configuration, calculation responsibility, and reporting format depending on the selected positioning mode. This parameter-based differentiation allows dual mode support while maintaining systematic control and avoiding unmanageable complexity.
3Extent of automation
If the location server performs all location calculations, then centralized control is improved, but the response time and efficiency are reduced
Solution Approach 1:
The positioning architecture is segmented into centralized (location server) and distributed (UE) components. The location server handles UE-assisted positioning calculations centrally, while UE-based positioning enables autonomous local calculation, optimizing the balance between centralized control and response time.
Solution Approach 2:
The UE acts as an intermediary that can either perform calculations locally (UE-based mode) or relay measurements to the location server for calculation (UE-assisted mode). This intermediary role enables flexible architecture that adapts to different control and timing requirements.
4Loss of time
If the UE performs all location calculations, then response time is reduced, but centralized control and coordination are weakened
Solution Approach 1:
The positioning functionality is segmented such that UE-based mode enables autonomous local calculation for rapid response, while UE-assisted mode engages the location server for centralized control when needed. This segmentation allows the system to achieve both fast response and centralized coordination as required.
Solution Approach 2:
The system dynamically transitions between autonomous UE-based calculation and server-assisted calculation based on operational requirements. This dynamic behavior enables the UE to provide rapid local responses when time-critical while maintaining the option for centralized coordination when accuracy and control are prioritized.
Data Source
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AI summary
The present disclosure relates to a method performed by a user equipment (UE) in a wireless communication system. Specifically, the method comprises the steps of: receiving, from a location server, a location request message including information regarding a dual positioning mode, which is associated with both measuring and calculating a location; measuring the location on the basis of at least one positioning reference signal (PRS); calculating the location on the basis of the measured location; and reporting the measured location to the location server.