Sidelink Anchor UE Selection Using Capability and Location Data
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Solution Overview
Problem
There is a need for improved methods and apparatuses to determine an anchor user equipment (UE) for sidelink positioning in wireless communication systems, particularly in next-generation wireless access technologies like New Radio (NR), to efficiently manage increasing communication demands and ensure reliable, low-latency V2X communications.
Innovation Solution
A method and apparatus for determining an anchor UE in a wireless communication system involves transmitting and receiving UE capability information, including location data, to select an anchor UE based on this information, and utilizing sidelink positioning reference signals (PRS) for location calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE capability information exchange is implemented for anchor UE selection, then positioning reliability is improved, but communication overhead increases
Solution Approach 1:
The patent extracts only the essential capability information needed for anchor UE selection (location information, positioning capability flags) from the full UE capability set. This selective information extraction enables reliable anchor selection while minimizing communication overhead by excluding unnecessary capability parameters.
Solution Approach 2:
The patent performs preliminary capability information exchange during the anchor UE selection phase before actual positioning measurements. By preparing and exchanging only the necessary capability information upfront, the system establishes reliable positioning anchors without generating excessive overhead during the main positioning operation.
2Measurement precision
If multiple candidate UEs are evaluated for anchor selection, then positioning accuracy is improved, but selection time increases
Solution Approach 1:
The patent applies different evaluation criteria to different candidate UEs based on their local characteristics (location information availability, positioning capability). This localized quality assessment allows the system to quickly identify suitable anchors by evaluating only the relevant attributes for each candidate rather than performing uniform comprehensive evaluation on all UEs.
Solution Approach 2:
The patent changes the selection parameters dynamically based on the evaluation of candidate UE capabilities. By adjusting the selection criteria according to the actual capability information received (e.g., prioritizing UEs with available location information), the system achieves accurate positioning while reducing selection time through adaptive parameter adjustment.
Data Source
AI summary
The present disclosure relates to a method for a user equipment (UE) to perform sidelink positioning in a wireless communication system. Specifically, the method comprises the steps of: transmitting, to at least one candidate UE, a request message requesting UE capability information related to the selection of an anchor UE for sidelink positioning; and receiving the UE capability information from the at least one candidate UE, wherein the UE capability information includes information related to the location of the at least one candidate UE, and the anchor UE is determined from among the at least one candidate UE on the basis of the UE capability information.