Method for providing a precise network time service
US6438702B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Dec 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5674
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A precise network time service that provides synchronization and time of day information. In accordance with my invention a user or customer premise equipment initiates the process by requesting time service from a network time server. The server responds by sending operation, administration, and maintenance (OAM) cells to the requesting party. These cells are immediately looped back to the time server and used to derive a minimum round trip time. Based on the minimum round trip time, the time server and the requesting party's equipment are subsequently synchronized. Once synchronized, delay measurements are used to maintain synchronism and provide time of day information so that such practical network problems as congestion may be monitored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.