1+1 protection method of services in OBS networks, intersection node apparatus and service protection system
US7664396B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2008 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Dec 23, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0084
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A 1+1 protection method of service in optical burst switching (OBS) networks, an intersection node apparatus, and protection system of service are provided. The method discloses that burst packets bearing service are transferred through two risk-independent routes, and each burst packet corresponds to a control packet. The intersection node receives a first control packet transferred through either route with a sequence number, and then, when it continues to receive the second control packet, which is transferred through the other route with the same sequence number as the first control packet carries within the waiting time of the first control packet, the intersection node selects the burst packet corresponding to the control packet with a smaller quality loss field value of the first and second control packets. The present invention prevents the services from being cut down, and remarkably reduces the packet loss ratio of the service.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.