Order persistent timer for controlling events at multiple processing stations
US5761431A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Apr 12, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/6489
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An order persistent timer is provided in each station on a network to control the timing of transmission of each isochronous data packet from a station, and to also control the timing of transmission of asynchronous data packets that include reservation requests. The OP timer at each station monitors traffic on the network from other stations to detect whether the network is active or idle. In an active state, the OP timer times a set interval of time sufficient to indicate the successful transmission of a packet on the frame. In the idle state (no packet on the network from another station), the OP timer times a number of deferral time intervals that are used with a network interrupt handler at the station to control the transmission of isochronous data packets without collision, and asynchronous data packets thereafter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.