Denso had seven patents in mobile during Q1 2024. The system includes master and sniffer devices with antennas of different polarized axes. The master device transmits a challenge signal to a portable access device, while the sniffer device receives and measures the arrival times of the signals to estimate distance or location of the device relative to the vehicle. GlobalData’s report on Denso gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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Denso grant share with mobile as a theme is 71% in Q1 2024. Grant share is based on the ratio of number of grants to total number of patents.
Recent Patents
Application: Passive entry/passive start access systems including round trip time sniffing (Patent ID: US20240029487A1)
The patent filed by Denso Corp describes a system that includes master and sniffer devices for accessing or providing operational control of a vehicle. The master device transmits a challenge signal to a portable access device, while the sniffer device receives this signal and measures the arrival times of both the challenge and response signals. Based on these arrival times, the system estimates the distance from the vehicle to the access device or the location of the access device relative to the vehicle. The system also includes a control module to prevent unauthorized access or control of the vehicle based on the estimated distance.
The system further involves the use of different tone signals exchanged between the initiator and responder devices at multiple frequencies. The control module can detect range extension type relay attacks and perform countermeasures in response. Additionally, the system includes antenna modules with different polarized axes to transmit and receive signals effectively. The control module can estimate distances based on phase differences of the tone signals and can be implemented at either the initiator or sniffer device. Overall, the system provides a secure and reliable way to access and control a vehicle while preventing unauthorized access attempts.
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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.
GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
