System and method for communicating using an in-vehicle system

Abstract

A system and method for communicating wirelessly from a mobile device to a remote receiver station is disclosed. The system includes a controller configured to monitor a status of the mobile device and, upon an initiation event, initiate a data transfer process to wirelessly communicate data to the remote receiver station. The system also includes a voice-band modem that, upon initiation of the data transfer process. The voice-band modem is configured to receive data for transfer to the remote receiver station, encode the data to form a series of encoded packets, and transmit the encoded packets to the remote receiver station using a first modulation scheme. Thereafter, unless an indication that the series of packets has been received by at the receiving station is provided, the voice-band modem automatically retransmit the encoded packets to the remote receiver station using a second modulation scheme.

1 - 20 . (canceled) 
     
     
         21 . An answering point device for communicating with a mobile device, the answering point device configured to:
 receive a series of symbols from the mobile device, each symbol being a sum of k orthogonal sinusoids out of a set of n orthogonal sinusoids, where k and n are integers with k<n;   demodulate each received symbol by performing a Fourier transform on each symbol to determine the frequencies of the k sinusoids present;   form received bursts from the demodulated symbols, a burst comprising one or more fountain encoded packets and a cyclic redundancy check code;   and reconstruct source data based on fountain encoded packets for which no errors have been detected by the cyclic redundancy check code.   
     
     
         22 . The answering point device of  claim 21  further configured to form a binary word of length n with k ones in bit positions corresponding to the k frequencies of the sinusoids present and zeros in all other bit positions. 
     
     
         23 . The answering point device of  claim 22  further configured to compare said formed binary word with a stored set of binary words from a table having entries of binary words of length n that have k ones and identify an index of an entry that matches said formed binary word. 
     
     
         24 . The answering point device of  claim 23  further configured to decode d bits, wherein the d bits corresponds to said index of said entry that matches said formed binary word, and d is the largest integer less than or equal to 
       
         
           
             
               
                 
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         25 . The answering point device of  claim 21  wherein the series of symbols is received via a voice channel. 
     
     
         26 . The answering point device of  claim 21  further configured to transmit a trigger signal to the mobile device to notify the mobile to start sending data data. 
     
     
         27 . The answering point device of  claim 26  further configured to transmit the trigger signal until all source data has been received. 
     
     
         28 . The answering point device of  claim 27  further configured to cease transmission of the trigger signal when all data has been received. 
     
     
         29 . A method in an answering point device for communicating with a mobile device, the method comprising:
 receiving a series of symbols from the mobile device, each symbol being a sum of k orthogonal sinusoids out of a set of n orthogonal sinusoids, where k and n are integers with k<n;   demodulating each received symbol by performing a Fourier transform on each symbol to determine the frequencies of the k sinusoids present;   forming received bursts from the demodulated data, a burst comprising one or more fountain encoded packets and a cyclic redundancy check code;   and reconstructing source data based on fountain encoded packets for which no errors have been detected by the cyclic redundancy check code.   
     
     
         30 . The method of  claim 29  further comprising forming a binary word of length n with k ones in bit positions corresponding to the k frequencies of the sinusoids present and zeros in all other bit positions. 
     
     
         31 . The method of  claim 30  further comprising comparing said formed binary word against a stored set of binary words from a table having entries of binary words of length n that have k ones and identifying an index of an entry that matches said formed binary word. 
     
     
         32 . The method of  claim 31  further comprising decoding d bits, wherein the d bits correspond to said index of said entry that matches said formed binary word and d is the largest integer less than or equal to 
       
         
           
             
               
                 
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                       n 
                     
                   
                   
                     
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         33 . The method of  claim 29  further comprising receiving the series of symbols via a voice channel. 
     
     
         34 . The method of  claim 29  further comprising transmitting a trigger signal to the mobile device to notify the mobile to start sending data. 
     
     
         35 . The method of  claim 34  further comprising transmitting the trigger signal to the mobile device until all data has been received. 
     
     
         36 . The method of  claim 35  further comprising ceasing transmission of the trigger signal when all data has been received. 
     
     
         37 . A mobile device for communicating wirelessly to a remote receiver station, wherein the mobile device is configured to:
 assemble source packets for transfer to the remote receiver station;   encode the source packets with a fountain code to form a series of encoded packets;   upon receiving a trigger signal from the remote receiver station, transmit encoded packets to the remote receiver station using a first modulation scheme; and   if the trigger signal persists after transmitting a predetermined number of encoded packets, transmitting encoded packets to the remote receiver station using a second modulation scheme.   
     
     
         38 . The mobile device of  claim 37  wherein the first modulation scheme includes a high-rate modulation scheme and the second modulation scheme includes a low-rate modulation scheme. 
     
     
         39 . A method in a mobile device for communicating wirelessly with a remote receiver station, the method comprising:
 assembling source packets for transfer to the remote receiver station;   encoding the source packets with a fountain code to form a series of encoded packets;   upon receiving a trigger signal from the remote receiver station, transmitting the encoded packets to the remote receiver station using a first modulation scheme; and   if the trigger signal persists after transmitting a predetermined number of encoded packets, transmitting encoded packets to the remote receiver station using a second modulation scheme.   
     
     
         40 . The method of  claim 39  wherein the first modulation scheme includes a high-rate modulation scheme and the second modulation scheme includes a low-rate modulation scheme.