Multiplex communications – Fault recovery – Bypass an inoperative station
Reexamination Certificate
2011-05-17
2011-05-17
Yao, Kwang B (Department: 2473)
Multiplex communications
Fault recovery
Bypass an inoperative station
Reexamination Certificate
active
07944815
ABSTRACT:
Methods and systems for fast and reliable network recovery from multiple link failures. In accordance with one example of the method, a master node receives a request from a transit node having a blocked port to open the blocked port for data forwarding, wherein the blocked port is associated with a restored link. The master node starts a health-check timer and transmits a health-check message on its primary port to determine that all failed links of the network are restored. Upon determining that the health-check message is received at its secondary port, the master node transmits a message to each transit node indicating that all failed links are restored. Upon determining that the health-check message is not received at its secondary port before the health-check timer lapsed, the master node transmits a message to the transit node to open the blocked port associated with the restored link for data forwarding.
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Radu Cristian
Riddell Andrew
Thomson Graeme
Wei Frank
Allied Telesis Holdings K.K.
Arent & Fox LLP
Loo Juvena
Yao Kwang B
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