Sidelink Positioning Using Orientation-Based PRS ID Selection
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Solution Overview
Problem
In conventional NR systems, measuring the relative position of a neighbor UE through sidelink is challenging, especially in environments with limited line of sight or infrastructure coverage, leading to collisions between response Positioning Reference Signals (PRS) due to the lack of effective resource allocation.
Innovation Solution
The proposed method involves determining an orientation angle based on the positioning UE, selecting a response PRS ID related to the request PRS ID using the orientation angle, and transmitting a response PRS. This approach minimizes collisions by employing PRS muting based on the orientation angle, allowing for effective resource allocation in sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional NR systems are used for sidelink positioning, then infrastructure coverage is provided, but collisions between response PRS occur in environments with limited line of sight or infrastructure coverage
Solution Approach 1:
The transmitting UE performs preliminary actions by determining an orientation angle based on the request PRS and pre-selecting a response PRS ID from a response PRS ID group before transmission. This preliminary selection based on orientation angle prevents collision with other UEs' response PRS in advance, ensuring reliable positioning even in environments with limited infrastructure coverage.
2Loss of information
If response PRS are transmitted without orientation-based resource allocation, then positioning information is provided, but resource allocation efficiency deteriorates due to collisions
Solution Approach 1:
The patent applies local quality by allocating different response PRS IDs to UEs based on their specific orientation angles. Each UE selects a response PRS ID corresponding to its local orientation relative to the requesting UE, ensuring that positioning information is preserved while resource allocation efficiency is improved by minimizing collisions through orientation-specific resource assignment.
3Object-generated harmful factors
If PRS muting based on orientation angle is implemented, then collisions between response PRS are reduced, but system complexity increases
Solution Approach 1:
The patent implements PRS muting by changing the parameter of response PRS ID selection based on orientation angle. The transmitting UE determines an orientation angle and selects a response PRS ID from a response PRS ID group corresponding to that orientation angle. This parameter change approach effectively reduces collisions while maintaining manageable system complexity through structured resource allocation.
Data Source
AI summary
The present disclosure relates to a positioning method using a sidelink, and a device. According to one aspect, a method of performing positioning through a sidelink by a vehicle terminal can comprise the steps of: receiving a request positioning reference signal (PRS) from a positioning terminal; determining the positioning terminal-based direction angle on the basis of the request PRS; determining a response PRS ID corresponding to the request PRS ID of a request RRS, on the basis of the determined direction angle; and transmitting a response PRS corresponding to the determined response PRS ID. The vehicle terminal is capable of communicating with at least one of another vehicle terminal, a UE related to an autonomous driving vehicle, the BS or a network.