Data transmission method and system, and device used therefor
US6975641B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2000 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Dec 4, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5631
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system including a central unit 10, a terminal 20, and a relay device 30 relay transmission of isochronous data effectively, in a time-sharing manner. The central unit 10 cyclically carries out the polling. In response to the polling, the terminal 20 transmits a plurality of frames. The relay device 30 detects that the plurality of frames transmitted from the terminal 20 via a transmission path 40 are completely received based on carrier-sensing by a carrier detecting portion 308 incorporated in the relay device 30. The relay device 30, at the time of detection, transmits frames received thereby without error to the central unit 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.