Vehicle Remote Device Authorization Antenna Zones
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Solution Overview
Problem
Existing remote vehicle access systems face challenges in quickly authorizing multiple remote devices for passive vehicle functions, particularly in scenarios where the location of these devices is unknown, leading to system latency issues.
Innovation Solution
A passive activation system utilizing a two-way wireless communication method with strategically located antennas to define authorization zones, employing a query phase to detect remote transceivers and a challenge phase to validate their security credentials, with a challenge hierarchy to prioritize and efficiently authorize valid transceivers, minimizing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the system authorizes multiple remote devices for passive vehicle functions, then the functionality and versatility of the system is improved, but the system latency increases due to the need to detect and validate multiple transceivers
Solution Approach 1:
The system performs preliminary actions by establishing authorization zones before actual authentication is needed. Multiple antennas are pre-positioned to define spatial zones, and the system pre-establishes the framework for detecting and prioritizing transceivers. This preliminary setup enables faster authentication when multiple devices are present, as the spatial organization is already in place.
Solution Approach 2:
The authorization process is segmented into distinct phases: query phase for detecting transceivers in authorization zones, challenge phase for validating credentials, and a prioritization mechanism that processes transceivers in order of determined priority. This segmentation allows the system to handle multiple devices systematically, reducing overall latency by processing them in parallel phases rather than sequentially.
2Reliability
If the system uses a challenge response protocol to validate security credentials, then the security and reliability are improved, but the time required for authorization increases
Solution Approach 1:
The system performs preliminary actions by pre-establishing security frameworks and using challenge-response protocols that can be executed efficiently. The challenge phase is designed to validate credentials quickly once transceivers are detected, using pre-computed validation logic that reduces the time required for authentication while maintaining high security standards.
Solution Approach 2:
The challenge-response protocol uses feedback mechanisms where the system sends challenges to detected transceivers and evaluates their responses. This feedback loop allows for rapid validation of security credentials by immediately responding to transceiver attempts, rejecting unauthorized devices quickly, and confirming authorized devices without unnecessary delays.
3Productivity
If the system detects and prioritizes transceivers based on their position and signal strength, then the productivity and speed of authorization is improved, but the complexity of the detection and measurement system increases
Solution Approach 1:
The detection system is segmented into multiple antennas positioned to define specific authorization zones. Each antenna or antenna combination handles specific spatial regions, allowing the system to detect and prioritize transceivers based on their position and signal strength in a distributed manner. This segmentation improves authorization speed by parallelizing detection across multiple zones while managing complexity through modular antenna placement.
Solution Approach 2:
The system adds a spatial dimension to the authorization process by using multiple antennas to define three-dimensional authorization zones. This dimensional approach allows the system to prioritize transceivers based on their spatial position and signal characteristics, improving authorization speed through spatial filtering while managing complexity through geometric zone definition rather than complex signal processing algorithms.
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
The system effectively and efficiently authorizes remote devices for passive vehicle functions, reducing system latency and ensuring reliable operation even in complex multi-device scenarios.
Implementation Method 1
a two-way wireless communication system with strategically located antennas
Data Source
AI summary
A system and method for authorizing a remote device amongst multiple remote devices for passive functions, such as passive entry and passive start, includes a vehicle having a plurality of strategically located antennas, combinations of which transmit a query signal and receive query responses, a challenge antenna amongst the plurality of antennas for transmitting a challenge signal to at least one of the multiple remote devices in accordance with a challenge order, and a control unit having a controller in communication with the antennas for determining the challenge order based upon the query responses. The controller can determine whether a remote device is located in an authorization zone, out of an authorization zone, or whether the remote device's location is indeterminate.