Modem signaling using a multitone prefix over a voice channel of a wireless communication system
US9225844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2010 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Oct 24, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/068
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.