Abstract: A data communication system for a vehicle includes an interface gateway device that is configured to be communicatively coupled with a data acquisition module and a client module. The interface gateway device is further configured to receive a value of a data parameter related to operation of the vehicle from the data acquisition module and to communicate the value to the client module for performing a function for the vehicle. The interface gateway device also is configured to determine when either of the data acquisition module or the client module is communicatively coupled with the interface gateway device and to implement respective communication configurations associated with the data acquisition module or the client module to receive the value of the data parameter from the data acquisition module or communicate the value of the data parameter to the client module.

Abstract: A communication system for a vehicle includes an input module, a selection module, and a publisher module. The input module is configured to receive data parameters associated with one or more conditions (e.g., states, current operational aspects or modes, operational environmental conditions) of the vehicle. The selection module is configured to select a subset of the data parameters. The publisher module is configured to communicate the data parameters in the subset to one or more applications of the vehicle that use the data parameters to perform one or more operations.

Abstract: A system and method for data communication over a cellular communications network that allows the transmission of digital data over a voice channel using a vocoder that operates in different modes depending upon characteristics of the inputted signal it receives. To prepare the digital data for transmission, one or more carrier signals are encoded with the digital data using one of a number of modulation schemes that utilize differential phase shift keying to give the modulated carrier signal certain periodicity and energy characteristics that allow it to be transmitted by the vocoder at full rate. The modulation schemes include DPSK using either a single or multiple frequency carriers, combined FSK-DPSK modulation, combined ASK-DPSK, as well as PSK with a phase tracker in the demodulator. These modulation schemes permit data communication via a CDMA, GSM, or other type of voice traffic channel at a low bit error rate.

Abstract: A software compass used during a GPS outage calculates vehicle heading and presents it upon request. The software compass gathers information from a yaw rate sensor, wheel steering angle sensor, wheel speed sensor, and PRNDL gear position sensor to calculate vehicle heading using a weighting algorithm. Because the yaw rate sensor data is a central factor in calculating vehicle heading, the quality of calibration of the yaw rate sensor is of importance. The disclosed calibration algorithm calculates the yaw rate bias and scale factors to calibrate the yaw rate sensor.

Abstract: An improved mobile connectivity system and method allow for data transfers, such as related to service delivery, to and from mobile wireless units in an economical and secure manner. The system utilizes existing IP connectivity when available and otherwise determines an appropriate data exchange mechanism based on the length and security requirements of the intended exchange. Data exchange mechanisms include SMS, IP and other suitable protocols, and wireless carriers include cellular and non-cellular wireless carriers. In an example, each subscriber unit periodically, or when triggered, sends its location to a call center to allow the delivery of location-based services.

Abstract: A software compass used during a GPS outage calculates vehicle heading and presents it upon request. The software compass gathers information from a yaw rate sensor, wheel steering angle sensor, wheel speed sensor, and PRNDL gear position sensor to calculate vehicle heading using a weighting algorithm. Because the yaw rate sensor data is a central factor in calculating vehicle heading, the quality of calibration of the yaw rate sensor is of importance. The disclosed calibration algorithm calculates the yaw rate bias and scale factors to calibrate the yaw rate sensor.

Abstract: A system and method for asynchronous data communication over a cellular communications network that allows the transmission of different types of data frames over a voice channel using a vocoder. The data frames include a synchronization signal and data segment, with the synchronization signal being selected in accordance with an attribute of the data segment so that, upon receipt of the data frame, the synchronization signal can be used by the demodulating modem to determine not only where the data segment begins, but also to identify what type of data segment is in the received data frame. The synchronization signals used have low cross-correlation and an auto-correlation function that approximates a unit impulse function to provide reliable transmission through the vocoder.

Abstract: A system and method for data communication over a cellular communications network that allows the transmission of digital data over a voice channel using a vocoder that monitors parameters of a Levinson Durbin recursion and then uses full rate CELP if the monitored prediction error falls to below a predetermined threshold within a pre-selected number of iterations of the recursion. The system and method encode digital data to be transmitted using a continuous signal modulation technique at a selected bit rate and one or more frequencies that are selected such that the resulting modulated carrier signal is processed by the vocoder using full rate CELP as a result of the monitored prediction error.

Abstract: An improved mobile connectivity system and method allow for data transfers, such as related to service delivery, to and from mobile wireless units in an economical and secure manner. The system utilizes existing IP connectivity when available and otherwise determines an appropriate data exchange mechanism based on the length and security requirements of the intended exchange. Data exchange mechanisms include SMS, IP and other suitable protocols, and wireless carriers include cellular and non-cellular wireless carriers. In an example, each subscriber unit periodically, or when triggered, sends its location to a call center to allow the delivery of location-based services.

Abstract: A method for establishing a wireless, mobile-terminated data connection with a telematics-equipped vehicle so that data can be sent to and received from the vehicle. Generally, the method involves receiving network address update information from a wireless carrier system, using the network address update information to determine if a network address currently exists for a particular telematics-equipped vehicle, and using the current network address (if one exists) to establish a wireless, mobile-terminated data connection with the telematics-equipped vehicle. This method addresses some of the challenges involved in creating a mobile-terminated data connection with a device that has a temporary or dynamic network address.

Abstract: A system and method for data communication over a cellular communications network that allows the transmission of digital data over a voice channel using a vocoder that operates in different modes depending upon characteristics of the inputted signal it receives. To prepare the digital data for transmission, one or more carrier signals are encoded with the digital data using one of a number of modulation schemes that utilize differential phase shift keying to give the modulated carrier signal certain periodicity and energy characteristics that allow it to be transmitted by the vocoder at full rate. The modulation schemes include DPSK using either a single or multiple frequency carriers, combined FSK-DPSK modulation, combined ASK-DPSK, as well as PSK with a phase tracker in the demodulator. These modulation schemes permit data communication via a CDMA, GSM, or other type of voice traffic channel at a low bit error rate.

Abstract: A method for configuring voice and data communication over a voice channel of a wireless telecommunications network that includes an onboard vehicle communications system, a cell tower, a base station, a Public Switched Telephone Network (PSTN) and a remote call center. Initially, a component on the network side, such as a network vocoder incorporated within a base station, selects a data rate during configuration of the voice channel. Thereafter, an onboard vocoder incorporated within a chipset of the onboard vehicle communications system sends a service option control message to the network vocoder requesting a higher data rate for the subsequent voice and data transmissions. A similar process occurs during a handoff that involves a change of network vocoders.

Abstract: A system and method for data communication over a cellular communications network that allows the transmission of digital data over a voice channel of the communications network. Digital data is encoded into DBPSK data using differential binary phase shift keying encoding. The DBPSK data is then sent across the cellular network using a vocoder having a linear predictive or other speech compression codec. At the receiving end, the DBPSK data is demodulated back into the original digital data. This approach permits data communication via a CDMA, GSM, or other type of voice traffic channel at a low bit error rate.

Abstract: A data transmission method with phase shift error correction comprising: transmitting through a network a transmission signal, wherein the transmission signal comprises a reference signal component having a predetermined frequency and a data signal component; receiving the transmission signal, wherein the received transmission signal includes a phase shift error caused by the network, wherein the phase shift error is in both the received reference signal component and the received data signal component; generating a multiplier signal at a receiver having the predetermined reference frequency; using the multiplier signal to determine the phase shift error in the received transmission signal; and correcting the received data signal component using the determined phase shift error.

Abstract: The invention provides a method of transitioning between voice and data communications with a mobile vehicle. A switch-to-voice command signal is sent from a call center modem pool to the mobile vehicle, and a vehicle switch-to-voice acknowledgement signal is received at the call center. A call from the call center modem pool is switched to a call center advisor in response to the vehicle switch-to-voice acknowledgement signal.

Abstract: The invention provides a method of transitioning between voice and data communications with a mobile vehicle. A switch-to-voice command signal is sent from a call center modem pool to the mobile vehicle, and a vehicle switch-to-voice acknowledgement signal is received at the call center. A call from the call center modem pool is switched to a call center advisor in response to the vehicle switch-to-voice acknowledgement signal.

Abstract: The present invention provides a method for communicating data over a voice channel of a wireless communication system. The method includes receiving a first periodic data signal and modulating the first periodic data signal to produce a second periodic data signal. Modulating the first periodic data signal includes inserting a predetermined silence period into the first periodic data signal at timed intervals to produce the second periodic data signal. The method further includes communicating the second periodic data signal over the voice channel of the wireless communication system. The method of modulating the first periodic data signal may include receiving a control signal that includes parameters for a length of the predetermined silence period and timing of the intervals, modulating the first periodic data signal responsive to the received control signal, and producing the second periodic data signal.

Abstract: The current invention provides a method for establishing a telephony data connection to a receiver. The telephony data connection is initiated at a source location. A carrier signal is generated for the connection and the carrier signal is modified. The modified carrier signal is sent to the receiver. Identification data is received from the receiver. A computer usable medium with suitable computer program code is employed for establishing a telephony data connection to a receiver.

Abstract: The invention provides a method of transitioning between voice and data communications with a mobile vehicle. A switch-to-voice command signal is sent from a call center modem pool to the mobile vehicle, and a vehicle switch-to-voice acknowledgement signal is received at the call center. A call from the call center modem pool is switched to a call center advisor in response to the vehicle switch-to-voice acknowledgement signal.