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Method of communicating data via a voice channel of a wireless communication network

一种无线通信系统、数据的技术，应用在数据通信领域，能够解决不能可靠地提供数据双向传输、发送非语音数据等问题

Inactive Publication Date: 2014-10-29
GENERAL MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For data transmission over a voice channel, this can be problematic, as the vocoder may choose a sub-full rate, making it difficult to successfully send non-speech data through the vocoder
For modulation techniques such as Frequency Shift Keying (FSK) and Amplitude Shift Keying (ASK) that have been successfully used in state-of-the-art vocoders (e.g. EVRC-A), the same frequency and modulation Bit rate combinations may not reliably provide bi-directional transmission of data using newer (e.g. EVRC-B) vocoders

Method used

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  • Method of communicating data via a voice channel of a wireless communication network
  • Method of communicating data via a voice channel of a wireless communication network
  • Method of communicating data via a voice channel of a wireless communication network

Examples

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Embodiment Construction

[0032] refer to figure 1 , shows an electronic communication system 10 constructed in accordance with the present invention. The communication system 10 includes a conventional cellular communication network having a voice traffic channel for bi-directional transmission of voice data between cellular telephones. Communication system 10 also includes the capability to utilize cellular system voice channels to exchange digital data containing information in addition to speech or other audio. As described in more detail below, this data communication is accomplished at least in part using continuous signal modulation (CSM) of a carrier signal at one or more selected audio frequencies such that when a newer generation EVRC vocoder is used to transmit an already When a modulated carrier signal is used, the modulated carrier signal can be transmitted by the vocoder at its full rate and can be demodulated at the receiving end such that the bit error rate is within desired or at leas...

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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.

Description

technical field [0001] The present invention relates generally to data communications over telecommunications networks, and more particularly to data communications over telecommunications voice channels using EVRC vocoders. Background technique [0002] Wired telephone systems were originally designed to carry voice to enable voice conversations over long distances. More recently, the public switched telephone system has become the primary medium for transmitting not only voice but also non-voice data, for example by using a facsimile machine which transmits image information over telephone lines, or by exchanging various forms of A modem for digital data (text, binary executable, image or video files). [0003] Today, cellular and other wireless communication systems are increasingly used for both voice and data communications. Most cellular communications in use in the world today employ GSM (including UMTS) or CDMA (IS-95 or CDMA2000) communication systems. These syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03C5/00H04L1/00
CPCH03C5/00
Inventor E·切斯努特J·殷S·马哈文I·叙尔蒂
Owner GENERAL MOTORS CORP
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