Distributed global clock system
US5822381A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1995 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | May 5, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0641
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A clock system for a distributed multiprocessor system includes a plurality of local clock circuits and a distribution network. The distribution network includes a plurality of interconnected routers. Each local clock circuit is associated with a processing node of the multiprocessor system. Each local clock circuit generates a global clock source signal, provides the global clock source signal to the distribution network, receives a global clock signal back from the distribution network, and generates a global time value based on a local clock signal and the global clock signal. The router is part of the distribution network of the multiprocessor system. The router receives the global clock source signals from each of the local clock circuits, selects one of the global clock source signals as the global clock signal and provides the global clock signal to the distribution network for distribution to each of the local clock circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.