PRS Group Positioning via Sequential Antenna Beam Broadcasting
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Solution Overview
Problem
Conventional positioning techniques are less effective in the millimeter wave spectrum due to interference and beam directionality issues, which hinder accurate positioning services for vehicles in wireless communication networks.
Innovation Solution
The implementation of a method that forms a positioning reference signal (PRS) group, where devices take turns sequentially broadcasting PRSs via multiple antenna beams, allowing for accurate timing information exchange to estimate positions, thereby compensating for beam directionality and interference in the millimeter wave spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional positioning techniques are used in millimeter wave spectrum, then positioning services are provided, but interference and beam directionality issues reduce positioning accuracy
Solution Approach 1:
The patent segments the PRS transmission into multiple antenna beams that are transmitted sequentially rather than simultaneously. This time-division approach allows each beam to transmit PRS without interference from other beams, eliminating the beam directionality interference problem while maintaining positioning accuracy through multiple measurement samples.
Solution Approach 2:
The patent implements preliminary actions by having the initiating device first transmit a first PRS via multiple antenna beams before any responding device transmits. This establishes timing information and channel conditions in advance, allowing subsequent PRS transmissions to be accurately timed and positioned, thereby improving measurement precision while managing interference through structured transmission sequencing.
2Area of stationary object
If multiple antenna beams transmit PRS simultaneously, then coverage is improved, but interference between beams degrades positioning accuracy
Solution Approach 1:
The patent divides the simultaneous PRS transmission across multiple antenna beams into a sequential process where each beam transmits PRS at different time slots. This segmentation in time allows all antenna beams to cover the entire service area while preventing interference between beams, as each beam transmits without concurrent signals from other beams.
Solution Approach 2:
The patent employs periodic action by having antenna beams transmit PRS in a sequential, periodic manner rather than simultaneously. Each beam transmits PRS during its designated time slot, creating a periodic transmission pattern that maintains comprehensive coverage while eliminating inter-beam interference through time-division multiplexing.
3Power
If PRS transmission is performed in millimeter wave spectrum, then high data rates are achieved, but beam directionality causes interference and reduces positioning reliability
Solution Approach 1:
The patent segments the PRS transmission process by time, assigning different time slots to different antenna beams. This allows the system to maintain high data rates through millimeter wave communications while improving positioning reliability by eliminating beam directionality interference. Each beam transmits PRS sequentially, ensuring clear signal reception and accurate timing information for reliable positioning.
Data Source
AI summary
In some implementations, a method of wireless communication includes transmitting, from an initiator of a positioning reference signal (PRS) group to other members of the PRS group, an indication of access to a wireless channel for the PRS group. The method further includes broadcasting a first PRS via each antenna beam of a plurality of antenna beams. An antenna array of the initiator is configured to communicate via the plurality of antenna beams. Other aspects and features are also claimed and described.