Control method of asynchronous data communications
US5796720A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Feb 6, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5636
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is provided a communication control method for a network including duplexed ring transmission lines and a plurality of communication controlling devices each accommodating a plurality of terminals and adapted to transmit data sent from any of the terminals and receive data over the ring transmission lines, the communication control method comprising the steps of: causing one communication controlling device to transmit monitoring cells simultaneously over the duplexed transmission lines, the monitoring cells each including a pass indication area for retaining a source address and identification information for identifying a passed communication controlling device; and causing another communication controlling device which receives the monitoring cells respectively from the duplexed transmission lines to relay and circulate the monitoring cells respectively over the duplexed transmission lines after writing in the pass indication area of each of the received monitoring cells data indicative of passage of said each monitoring cell. The communication control method improves the efficiency of the fault monitoring and fault reporting on the transmission lines of the ring LAN.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.