Cooperative Sensor Positioning via Interrogation Pulses
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Solution Overview
Problem
Current vehicle-to-environment communication methods, such as satellite-based positioning, fail to provide precise positioning at a reasonable cost for safety applications like intersection assistance and lane change warnings, and existing communication systems are not reliable for safety-critical data transmission.
Innovation Solution
The method utilizes a cooperative sensor system with a frequency band reserved for vehicle-related safety applications, employing a pseudo-random noise code and phase shift measurements to achieve precise positioning and reliable data exchange between vehicles and infrastructure, leveraging the ITS-G5 standard and IEEE 802.11p for improved communication accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellite-based positioning systems (GPS, Galileo) are used for vehicle positioning, then positioning coverage is improved, but positioning precision deteriorates (cannot achieve very precise positioning required for safety applications)
Solution Approach 1:
The patent introduces an intermediary cooperative sensor communication system between vehicles and infrastructure. Instead of relying solely on satellite signals, the system uses interrogation pulses and response pulses exchanged between vehicles and roadside infrastructure as intermediaries to determine precise relative positions, achieving centimeter-level accuracy for safety applications
Solution Approach 2:
The patent employs a multi-functional communication system that operates on frequency bands reserved for vehicle-related safety applications. The same transmission and reception units are used both for ad hoc network communication and for cooperative sensor communication, enabling the system to serve multiple purposes including positioning, data exchange, and safety communication
2Adaptability or versatility
If multiple different communication units are deployed for various communication purposes, then communication versatility is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a universal communication unit that integrates multiple communication functions. The transmission and reception units operate on reserved frequency bands and can perform both ad hoc network communication and cooperative sensor communication, eliminating the need for separate WLAN units, RKE units, and GPS modules while maintaining full communication versatility
Solution Approach 2:
The patent merges previously separate communication functions into a single integrated system. The cooperative sensor communication unit combines the functionalities of what were previously separate WLAN-based communication units, RKE units, and GPS modules, reducing device complexity and cost while maintaining all necessary communication capabilities
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables precise relative positioning with an accuracy of 1 cm and high update rates, ensuring reliable data transmission for safety applications, reducing the need for additional sensors and improving navigation and safety device performance.
Implementation Method 1
a first sensor of a first communication participant sends out an interrogation pulse with a transmission and reception unit, which is answered by a transmission and reception unit of a second sensor of a second communication participant with a response pulse
Implementation Method 2
The carrier wave can be modulated with a pseudo-random code to increase the directional resolution
Data Source
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AI summary
The invention relates to methods and to an accordingly designed communication unit for the positioning in the vehicle-to-environment communication. According to the method of the invention, a first sensor (4; S1) of a first communication subscriber with a transmitting and receiving unit (2) emits an interrogation pulse which is answered with a response pulse by a transmitting and receiving unit (2) of a second sensor (4; S2) of a second communication subscriber. The response pulse is received by the first sensor (4; S1), evaluated and the positioning is carried out. In order to achieve a reliable communication via cooperative sensors, the transmitting and receiving units (2) of the first and the second sensor (4; S1, S2) use a frequency band (SCH2) reserved for vehicle-related security applications.