Performance monitoring of frame transmission in data network OAM protocols
US7733794B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 2006 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Aug 11, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5649
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Performance measurements for a network, such as delay, delay variation, and loss, are performed over layer-2. A PM frame is sent from a source MEP (Maintenance End Point) to a destination MEP. The PM frame is timestamped immediately prior to transmission, and the local clock at the destination MEP is noted immediately upon arrival. MIPs (Maintenance Intermediate Points) may also time stamp the PM frame. Preferably, each PM frame has an interval (session) identifier and a sequence number within the interval. The PM frames are received by and sent by PM modules within the nodes of the network. The PM modules include a Sender function for sending an interval of one or more PM frames and a Receiver function for receiving PM frames and computing measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.