Method and apparatus for coordinating multi-point to-point communications in a multi-tone data transmission system
US6473438B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1997 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Oct 22, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2001/0093
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A variety of bi-directional data transmission systems that facilitate communications between a plurality of remote units (15) and a central unit (10) using a frame based discrete multi-carrier transmission scheme are disclosed. In each of the systems, frames transmitted from the plurality of remote units (15) are synchronized at the central unit (10). A variety of novel modem arrangements and methods for coordinating communications between a plurality of remote units (15) and a central unit (10) to facilitate multi-point-to-point transmission are disclosed. The invention has application in a wide variety of data transmission schemes including Asymmetric Digital Subscriber Line systems that includes the transmission of signals over twisted pair, fiber and/or hybrid telephone lines, cable systems that includes the transmission of signals over a coaxial cable, and digital cellular television systems that include the transmission of radio signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.