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The TPMS architecture with four antennas. information to determine the

The TPMS architecture with four antennas. information to determine the

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Download scientific diagram | The TPMS architecture with four antennas. information to determine the origin of the data packet and to filter out packets transmitted by other vehicles. To prolong the battery life, tire pressure sensors are designed to sleep most of the time, but can be waken up in response to an RF activation signal. Activation signals are designed for diagnosis scenarios and the initial sensor ID binding phase, when sensors are required to transmit their IDs or other measurements. The RF activation signals operate at 125 kHz in the low frequency (LF) radio frequency band and can only wake sensors within a short range, due to the generally poor characteristics of RF antennas at that low frequency. According to manuals from different tire sensor manufacturers, the activation signal can be either a tone or a modulated signal. In either case, the LF receiver on the tire sensor filters the incoming activation signal and wakes up the sensor only when a matching signal is recognized. from publication: Lightweight secure communication protocols for in-vehicle sensor networks | Wireless sensor networks are increasingly being integrated into the modern automobile with the intention of improving safety and reducing costs. However, it has been shown that the first widely-deployed and mandatory in-car sensor networks --Tire Pressure Monitoring Systems | Communication Protocols, Sensor Networks and Security Protocols | ResearchGate, the professional network for scientists.