Apparatus and method to use PTP timestamps for one-way delay and delay variation measurement in IP networks
US10063449B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2015 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Sep 5, 2036 |
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 one-way active measurement protocol (OWAMP) 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 control-client that communicates with a server to establish an OWAMP test session between a sender and a receiver. The method includes receiving a server greeting message from the server indicating timestamp formats that the receiver can interpret, checking whether the receiver supports the multiple timestamp format extensions to OWAMP, configuring the sender to set timestamps in a format that the sender can set and the receiver can interpret if the receiver supports multiple timestamp format extensions to OWAMP, sending an extended set-up-response message to the server indicating a timestamp format that the sender can set and the receiver can interpret, and receiving a server-start message from the server.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.