Method of and system for implementing multiple levels of asynchronous priority in FDDI networks
US5119374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1991 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Oct 3, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/433
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The standard FDDI priority algorithm is implemented by programming Token Holding Time (THT) threshold values for asynchronous service either in an increasing or decreasing order as a function of token holding time. If the thresholds are programmed in a decreasing order, all higher priority data is sent to the network before any lower priority data is sent. If the thresholds are programmed in an increasing order, highest priority data is sent first, until the unexpired token holding time falls below the threshold value for that priority; the next lower priority level data then is transmitted, and so on. Accordingly, at least some data of all priority assignments pending for transmission are sent to the medium during each token capture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.