Apparatus and method for changing frequency deviation

摘要

A protocol to be used in the transmission is determined. Based upon the protocol, the transmission frequency range of a clock is selectively altered. TPMS data is transmitted according to the altered transmission frequency range of the clock.

主权项

1. A method for transmitting frequency-shift keying (FSK)-based tire pressuring monitoring system (TPMS) data, comprising,
at a first time and at a single tire pressure monitoring (TPM) sensor, determining a first protocol to be used in the transmission of tire pressure monitoring data from a transmitter; based upon the first protocol, selecting a first deviation between a first high frequency that is used to transmit a logic one and a first low frequency to transmit a logic zero; wherein the first deviation is selected at least in part by comparing a first deviation threshold with a first high frequency deviation associated with the first protocol; transmitting the FSK-based TPMS data according to the first high frequency when there is a logic one and first low frequency when there is a logic zero; at a second time that occurs after the first time and at the same TPM sensor, subsequently determining a second protocol to be used in the transmission of tire pressure monitoring data from the transmitter; based upon the second protocol, selecting a second deviation between a second high frequency that is used to transmit a logic one and a second low frequency to transmit a logic zero; wherein the second deviation is selected at least in part by comparing a second deviation threshold with a second high frequency deviation associated with the second protocol; wherein the first deviation is different than the second deviation; transmitting FSK-based TPMS data according to the second high frequency when there is a logic one and second low frequency when there is a logic zero; wherein the first protocol is switched to the second protocol on-the-fly at the single TPM sensor during the operation of the TPM sensor; wherein the first protocol and the second protocol comprise one or more of a data format or baud rate; wherein the first protocol and the second protocol are determined at least in part by a controller.