摘要:
The described invention provides a method and system for allowing subscribers of a telematics service provider (TSP) to make hands-free phone calls within their vehicles through a telematics unit over a network or hardware-based pre-pay system, wherein the telematics unit or a wireless network provider associated with the TSP controls the ingoing and outgoing hands-free calling (HFC) processes. The wireless network provider, through its system at a remote call center or through the telematics unit, may determine whether the subscriber has subscribed to the TSP's HFC service, whether the subscriber has a sufficient remaining balance to initiate, receive or continue a call, and whether a user of the telematics unit is “roaming.” When a user attempts to make or receive a call through the telematics unit, the wireless network provider or the telematics unit may handle the incoming or outgoing call processing, and may further provide subscriber account balance notifications to the user.
摘要:
A system and method for making vehicle originated calls to a telematics service provider or other call center. The method includes identifying a call type associated with a desired wireless communication of speech or data to the call center, and then carrying out one of a number of different call connection processes depending on the call type. For voice channel cellular connections, an in-band modem cellular connection is preferably established in most instances using a connection retry strategy that includes primary, secondary, and possibly tertiary connection attempts. The system and method can be carried out in connection with various cellular system technologies, but is especially suited for use with GSM systems.
摘要:
A method and system for modem signaling over a voice channel of a cellular or other wireless communication system. A plurality of sequential tones are transmitted, each of which corresponds to at least one network type and contains at least one primary frequency selected so as to successfully be passed through its associated network type. This permits the use of modem signaling to establish a data connection regardless of the type of network equipment utilized, so that the method will work with both newer and older generation vocoders and other network equipment.
摘要:
A method and system for local broadcasting of messages from a wireless mobile device to many others located within the same geographic area. This can be done using SMS messaging wherein a message to be broadcast is addressed to a particular designated address and, when received by a wireless carrier system, is checked to determine that it came from an authorized sender, and then is broadcasted by the wireless carrier system to a geographically-limited area within which the sending wireless mobile device is located.
摘要:
A system and method for making vehicle originated calls to a telematics service provider or other call center. The method includes identifying a call type associated with a desired wireless communication of speech or data to the call center, and then carrying out one of a number of different call connection processes depending on the call type. For voice channel cellular connections, an in-band modem cellular connection is preferably established in most instances using a connection retry strategy that includes primary, secondary, and possibly tertiary connection attempts. The system and method can be carried out in connection with various cellular system technologies, but is especially suited for use with GSM systems.
摘要:
A system and method of communicating data between a vehicle and call center via a voice channel of a wireless communication system. The method carried out by the system includes the steps of: establishing a voice channel connection between a vehicle telematics unit and call center via a wireless cellular network; generating a modem signaling carrier comprising a prefix followed by a single frequency tone; sending the modem signaling carrier over the voice channel connection using an EVRC-B vocoder; establishing a data communication session over the voice channel connection in response to the modem signaling carrier; and thereafter carrying out data communications between the vehicle telematics unit and call center during the data communication session.
摘要:
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.
摘要:
A system and method for making vehicle originated calls to a telematics service provider or other call center. The method includes identifying a call type associated with a desired wireless communication of speech or data to the call center, and then carrying out one of a number of different call connection processes depending on the call type. For voice channel cellular connections, an in-band modem cellular connection is preferably established in most instances using a connection retry strategy that includes primary, secondary, and possibly tertiary connection attempts. Cell selection can be carried out using an acquisition task, background scan and inter-country PLMN reselection process that are used to select among available PLMNs and base stations. The system and method can be carried out in connection with various cellular system technologies, but is especially suited for use with GSM systems.
摘要:
A system and method for making vehicle originated calls to a telematics service provider or other call center. The method includes identifying a call type associated with a desired wireless communication of speech or data to the call center, and then carrying out one of a number of different call connection processes depending on the call type. For voice channel cellular connections, an in-band modem cellular connection is preferably established in most instances using a connection retry strategy that includes primary, secondary, and possibly tertiary connection attempts. Cell selection can be carried out using an acquisition task, background scan and inter-country PLMN reselection process that are used to select among available PLMNs and base stations. The system and method can be carried out in connection with various cellular system technologies, but is especially suited for use with GSM systems.
摘要:
A system and method for making vehicle originated calls to a telematics service provider or other call center. The method includes identifying a call type associated with a desired wireless communication of speech or data to the call center, and then carrying out one of a number of different call connection processes depending on the call type. For voice channel cellular connections, an in-band modem cellular connection is preferably established in most instances using a connection retry strategy that includes primary, secondary, and possibly tertiary connection attempts. The system and method can be carried out in connection with various cellular system technologies, but is especially suited for use with GSM systems.