Data transmission installation of the radio network type, and corresponding process
US5638449A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1994 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Sep 26, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of data transmission for a data transmission system which includes at least two data processing stations, each of the data processing stations being equipped with a network interface configured to communicate by radio over a data channel, to emit messages on request, to collect messages received, and to establish confirmative emission or reception orders, includes a first step of receiving an order confirming emission of a message in one of the data processing stations. In the next step, the station responds to the order by carrying out, over the data channel, a rapidly alternating emission/reception according to a chosen pattern peculiar to this station. The station recognizes a collision if a signal of superior strength to a first threshold strength is received during a substantial part of at least one silence of the rapidly alternating emission/reception, thus demonstrating the concomitant emission of another station. The collision is processed if so recognized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.