Latency evaluation in a ring network
US7113485B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2001 |
| Grant date | Sep 26, 2006 |
| Priority date | — |
| Expiry date | Jul 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for measuring latency in a bi-directional ring network includes transmitting a latency measurement packet from an originating node to a peer node and noting a time of receipt of the packet at the peer node. The packet is then transmitted back to the originating node in the opposite direction, while recording in the packet an indication of a peer node difference between a time of transmission of the packet from the peer node to the originating node and the time of receipt of the packet at the peer node. A time of return of the packet to the originating node is noted, so as to determine an originating node difference between a time of transmission of the packet from the originating node to the peer node and the time of return of the packet to the originating node. The latency is calculated by taking a difference between the originating node difference and the peer node difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.