Sidelink PRS Transmission for UE Location Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in estimating the location of a UE without the aid of a base station or LCS server, particularly in areas outside the base station's coverage, and require complex resource multiplexing for sidelink positioning.
Innovation Solution
A method involving sidelink communication where a target UE transmits positioning reference signals (PRS) to multiple server UEs, which measure the time of arrival (TOA) values, allowing the target UE to determine its location based on the received location information and TOA values from these server UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE transmits PRS to multiple server UEs for location estimation without base station aid, then location service capability is improved in areas outside base station coverage, but device complexity and resource multiplexing requirements increase
Solution Approach 1:
The patent segments the positioning function by having the target UE transmit PRS to multiple server UEs independently, rather than requiring centralized base station coordination. Each server UE independently measures TOA and assists in location calculation, dividing the complex positioning task into simpler distributed operations that reduce overall system complexity while maintaining location service capability in coverage areas
Solution Approach 2:
The patent introduces server UEs as intermediaries between the target UE and the location estimation process. These server UEs receive PRS transmissions, measure TOA values, and provide assistance information to the target UE, mediating the positioning function without requiring direct base station involvement and simplifying the resource multiplexing requirements
2Measurement precision
If PRS transmission is performed for sidelink positioning, then location estimation accuracy is improved, but communication time and resource overhead increase
Solution Approach 1:
The patent merges the PRS transmission function with existing sidelink communication resources. By utilizing established PC5 interface resources and combining positioning reference signal transmission with regular sidelink communication patterns, the system achieves accurate location estimation without proportionally increasing communication time overhead
Solution Approach 2:
The patent implements periodic PRS transmission between the target UE and server UEs. By transmitting PRS at optimized periodic intervals rather than continuously, the system maintains location estimation accuracy while minimizing communication time consumption and resource overhead, allowing UEs to balance positioning needs with other communication requirements
Data Source
AI summary
A method for performing, by a first user equipment, wireless communication is proposed. The method may comprise the steps of: transmitting a positioning reference signal (PRS) to a plurality of second user equipments; receiving, from the plurality of second user equipments, location information of the plurality of second user equipments and time of arrival (TOA) values of the plurality of second user equipments; and determining a location of the first user equipment on the basis of the location information of the plurality of second user equipments and the TOA values of the plurality of second user equipments. For example, the TOA values may be determined on the basis of a time when the plurality of second user equipments receive the PRS.