1+1 protection method of services in OBS networks,...

Details 1+1 protection method of services in OBS networks,... 1+1 protection method of services in OBS networks,...

2008-12-23

2010-02-16

Sedighian, M. R. (Department: 2613)

Optical communications

Multiplex

Optical switching

C398S054000, C370S473000, C370S464000

Reexamination Certificate

active

07664396

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.

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