Methods and nodes for handling delay information in synchronisation packets
US10075253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2015 |
| Grant date | Sep 11, 2018 |
| Priority date | — |
| Expiry date | Jul 20, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/283
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method and arrangement for providing delay information to synchronization packets passing a transport network node. In a transport network node synchronization packets propagate from a synchronization master node towards boundary clock nodes. The synchronization packets pass the transport network node, in which the synchronization packets are received, and a level of delay is determined. Furthermore, when the level of delay for the synchronization packets is above a threshold, the synchronization packets are marked with a delay indication. The received synchronization packets are sent to the boundary clock node or ordinary clock node, whether or not they are marked. By implementing functionality for determining a level of delay of synchronization packets, and marking passing synchronization packets with delay indications, boundary clock nodes and ordinary clock nodes may differentiate the received synchronization packets based on the delay identifications. Thereby, improved accuracy may be achieved when calculating time synchronization offsets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.