Modem signaling using speech components over a voice channel of a wireless communication system
First Claim
1. A method of communicating with a modem via a voice channel of a wireless communication system, comprising the steps of:
- generating a composite carrier comprising a speech component together with a single-frequency signaling tone, wherein the generating step further comprises generating the composite carrier such that the power ratio of the speech component to the single-frequency signaling tone is under zero decibels; and
sending the composite carrier including the speech component and the single-frequency signaling tone to a modem across a voice channel of a wireless communication system.
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Accused Products
Abstract
A system and method of communicating with a modem via a voice channel of a wireless communication system. The method carried out by the system includes the steps of (a) establishing a voice channel connection between a vehicle telematics unit and call center via a wireless cellular network, (b) generating a modem signaling carrier comprising a single frequency tone together with a speech component, (c) sending the modem signaling carrier over the voice channel connection using an EVRC-B vocoder, (d) establishing a data communication session over the voice channel connection in response to the modem signaling carrier, and thereafter (e) carrying out data communications between the vehicle telematics unit and call center during the data communication session.
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Citations
14 Claims
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1. A method of communicating with a modem via a voice channel of a wireless communication system, comprising the steps of:
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generating a composite carrier comprising a speech component together with a single-frequency signaling tone, wherein the generating step further comprises generating the composite carrier such that the power ratio of the speech component to the single-frequency signaling tone is under zero decibels; and sending the composite carrier including the speech component and the single-frequency signaling tone to a modem across a voice channel of a wireless communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of communicating data between a vehicle and call center via a voice channel of a wireless communication system, comprising the steps of:
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establishing a voice channel connection between a vehicle telematics unit and a call center via a wireless cellular network; generating a modem signaling carrier comprising a single frequency tone together with a speech component, wherein the modem signaling carrier has a power ratio of speech component to single frequency tone that is less than zero decibels (dB); 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
thereaftercarrying out data communications between the vehicle telematics unit and call center during the data communication session. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification