Method and apparatus for measuring one way transmission delay
US7848248B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 2008 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Aug 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/66
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus enabling the measurement of one way delay in each of the two directions of transmission from a single location are disclosed. The method measures a first roundtrip delay at a first location between a first endpoint and a second endpoint over a first communication network, and measures a second roundtrip delay between a third endpoint and a fourth endpoint over a second communication network with symmetric delay characteristics. The method performs synchronous recordings of a test signal that is sent simultaneously from the second endpoint to the first endpoint and from the fourth endpoint to the third endpoint, to measure an arrival time (t1) of the test signal over the first communication network, and, an arrival time (t2) of the test signal over the second communication network t2, where the arrival times (t1) and (t2) are used to calculate an one way transmission delay in the first communication network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.