Automatic bypass system for ring type local area network
US4956836A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1988 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Mar 28, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/437
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In an exemplary embodiment, a ring net work is of a multiple petal configuration with the petal path to and from each node extending through a petal isolator at a hub location. A set of terminals is provided at the hub location for each node. An activity detector is coupled to a terminal of each set for detecting the normal network signals returning from a respective node, and a bypass controller is connected to another terminal of each set for sensing such signals transmitted to a respective node. The controller operates to sense separate signal bursts, and to bypass the set of terminals associated with a give node in the absence of signal detection by the associated signal detector after a selected number of separate signal bursts have been transmitted to the node. The timing relationships can be adjusted to accommodate a ring network where signals are transmitted about a ring with signal amplification and undelayed signal transmission at the respective nodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.