Wireless Signal Source Identification via Process-Specific Secure Information
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Solution Overview
Problem
In wireless communication systems, it is challenging for portable devices to determine the transmission source of wireless signals from in-vehicle devices when the signals do not include identifying information, leading to ambiguity in positional estimation and control processes.
Innovation Solution
Incorporating a control section in both portable and in-vehicle devices to transmit and receive wireless signals with different secure information pieces during designated processes, allowing the devices to identify and authenticate each other based on predefined secure information, thereby determining the transmission source accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wireless signals do not include identifying information, then communication simplicity is maintained, but transmission source determination becomes impossible
Solution Approach 1:
The patent segments the wireless communication process into multiple designated processes (first, second, and subsequent processes), where each process uses distinct secure information. This segmentation allows the system to maintain simple signal structures while enabling transmission source determination through process-specific secure information comparison.
Solution Approach 2:
The patent applies preliminary action by pre-defining secure information for each designated process before communication occurs. The portable device and in-vehicle device exchange and store secure information corresponding to specific processes in advance, enabling them to determine transmission sources by comparing received secure information against their predefined sets without adding complex identifying fields to the signals.
2Adaptability or versatility
If multiple in-vehicle devices transmit signals simultaneously, then communication coverage is improved, but transmission source ambiguity increases
Solution Approach 1:
Each in-vehicle device is pre-configured with unique secure information for each designated process. When multiple devices transmit simultaneously, the portable device can determine the transmission source by comparing the secure information received in each signal against its predefined secure information sets, reliably identifying which specific in-vehicle device sent each signal despite simultaneous transmissions.
Solution Approach 2:
The patent assigns different secure information to different in-vehicle devices for the same designated process, creating local quality differentiation. This allows the system to maintain uniform communication protocols while enabling individual device identification through the unique secure information embedded in each device's transmissions.
3Measurement precision
If secure information is included in wireless signals, then transmission source determination is enabled, but communication security requirements increase
Solution Approach 1:
The patent segments secure information into process-specific sets, where each designated process has its own predefined secure information. This segmentation reduces the security burden by limiting the scope of secure information validation to specific processes rather than requiring universal security mechanisms across all communication types.
Solution Approach 2:
The patent uses secure information that is effective for specific designated processes rather than requiring long-term, universally valid security credentials. Each secure information set is tied to particular processes, allowing the system to use simpler, process-limited security mechanisms rather than complex, long-term authentication systems.
Data Source
AI summary
A wireless communication system includes: a first wireless communication device configured to transmit a first wireless signal and receive a second wireless signal in conformity with a designated communication standard; and at least one second wireless communication device configured to transmit the second wireless signal and receive the first wireless signal in conformity with the designated communication standard. The first wireless communication device and the second wireless communication device perform a designated process more than once on a basis of transmission and reception of the first wireless signal and the second wireless signal. Each of the designated processes includes at least any of transmission and reception of the first wireless signal and the second wireless signal. Moreover, the first wireless signal and the second wireless signal used in the designated processes include secure information for identifying a transmission source of the first wireless communication device.