Multiplex communications – Fault recovery – Bypass an inoperative station
Reexamination Certificate
2007-12-11
2007-12-11
Jain, Raj K (Department: 2616)
Multiplex communications
Fault recovery
Bypass an inoperative station
C370S217000, C370S219000, C370S221000, C370S223000, C370S225000, C370S228000, C370S242000, C370S249000, C370S250000
Reexamination Certificate
active
10157716
ABSTRACT:
A ring network having a plurality of nodes connected by a working channel and a protection channel. When no failure exists, the working channel and the protection channel are link-aggregated into one virtual channel, and the transmission of the working traffic is carried out using both channels. When failure occurred to a line of the network, the link aggregation is suspended and a protection function in conjunction with the link aggregation is activated, in which a path avoiding the failure point is established by means of layer 1 protection process and thereafter data transmission is carried out by use of the path established by the layer 1 protection function. Therefore, data transmission in the no failure stated can be conduced using a bandwidth of twice as large as that of convention ring networks.
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Jain Raj K
NEC Corporation
Scully, Scott, Murphy & Presser, P.C
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