Transmission method and system thereof
US5426638A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 19, 1990 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Mar 19, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/64
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A data transmission method and system of a token passing type capable of periodically transmitting cyclic data produced in a station to other stations while enabling a packet data communication with high efficiency and without disturbing the periodicity of the cyclic communication. A token circulation time is set to be shorter than a cycle time for production of the cyclic data where no packet data is to be transmitted. Also each station will pass an acquired token immediately to the next station if the station has no data to be transmitted. Thus, at least one station can receives a token at least two times during the cycle time to transmit the cyclic data and the packet data. Upper limits may be set to capacities of the cyclic data and the packet data which are capable of being transmitted each time the token is acquired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.