Multi-tone detection for in-band data modem link establishment in wireless networks
US8483245B2 · kind B2 · utility
4Cited by
2References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 30, 2010 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Jul 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/181
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for modem signaling over a voice channel of a cellular or other wireless communication system. A plurality of sequential tones are transmitted, each of which corresponds to at least one network type and contains at least one primary frequency selected so as to successfully be passed through its associated network type. This permits the use of modem signaling to establish a data connection regardless of the type of network equipment utilized, so that the method will work with both newer and older generation vocoders and other network equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.