Method for in-band signaling of data over digital wireless telecommunications networks

• US 7,317,696 B2
• Filed: 03/15/2002
• Issued: 01/08/2008
• Est. Priority Date: 05/19/1997
• Status: Expired due to Fees

• Current Assignee: Karma Automotive LLC (Wanxiang Group Corporation)
• Original Assignee: Airbiquity Incorporated
• Inventors: Leyendecker, Robert, Eatherly, Wayne, Proctor, Rod L., Preston, Dan A., Preston, Joseph
• Primary Examiner(s): Gelin, Jean
• Assistant Examiner(s): Mehra, Inder Pal
• Application Number:
  US10/099,098
• Publication Number:
  US 20020097706A1
• Time in Patent Office: 2,125 Days
• Field of Search: 370/310, 370/352, 370/522, 370/493, 455/563
• US Class Current: 370/310
• CPC Class Codes: G01S 2205/002 for traffic control, mobile tracking, guidance, surveillance or anti-collision
• CPC Class Codes: G01S 2205/008 using a mobile telephone network
• CPC Class Codes: G01S 5/0027 of actual mobile position, i.e. position determined on mobile
• CPC Class Codes: G01S 5/0036 of measured values, i.e. measurement on mobile and position calculation on base station
• CPC Class Codes: G08G 1/127 to a central station ; Indicators in a central station
• CPC Class Codes: H04M 11/066 Telephone sets adapted for data transmision
• CPC Class Codes: H04W 88/181 Transcoding devices; Rate adaptation devices

Abstract

An inband signaling modern communicates digital data over a voice channel of a wireless telecommunications networks. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The digital data is also encoded to prevent voice encoding circuitry in the telecommunications network from corrupting the synthesized audio tones representing the digital data. An output then outputs the synthesized audio tones to a voice channel of a digital wireless telecommunications network.

Claims

1. A method for communicating digital data over the voice channel of a digital wireless telecommunications network comprising:

receiving a digital bitstream;

encoding the digital bitstream into a continuous audio signal having different frequency tones for different bit values;

selecting the frequency tones to represent speech signals that will pass through a voice coder without being corrupted;

encoding the audio signal into encoded values with a voice coder for transmitting over the voice channel of the digital wireless telecommunications network; and

transmitting the encoded values over the voice channel of the digital wireless telecommunications network.

2. A method according to claim 1 including:

segmenting the digital bitstream into packet payloads in inband signaling packets; and

attaching preconditioning bits to the inband signaling packets that prevent circuitry in the digital wireless telecommunications network from corrupting the bits from the digital bitstream.