Apparatus and method to use PTP timestamps for two-way delay and delay variation measurement in IP networks
US10320646B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2015 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Aug 4, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method is implemented by a network device to establish a two-way active measurement protocol (TWAMP) test session that supports use of a Network Time Protocol (NTP) timestamp format and a Precision Time Protocol Version 2 (PTPv2) timestamp format. The network device acts as a server that communicates with a control-client to establish a TWAMP test session between a sender and a reflector. The method includes sending a server greeting message to the control-client indicating timestamp formats that the reflector can set, receiving a set-up-response message from the control-client indicating timestamp formats that the sender can interpret, checking whether the sender supports the multiple timestamp format extensions to TWAMP, configuring the reflector to set timestamps in a format that the reflector can set and the sender can interpret if the sender supports multiple timestamp format extensions to TWAMP, and sending a server-start message to the control-client.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.