Patent ID: 7680136
Filing Date: 2010-03-16
Classification: H04L,Y10S

Abstract:
1. A transmission device that carries out a route control of a frame based on a label included in the frame in a ring network including at least one other transmission device, the transmission device comprising: a message generating unit that generates a message for collecting information on a plurality of first labels allocatable to a working route in the ring network and a plurality of second labels allocatable to a standby route in the ring network; a message transmitting unit that transmits the message to the at least one other transmission device through the ring network; a message receiving unit that receives the message that has been circulated through the ring network via the at least one other transmission device; and a label selecting unit that selects one of the first labels for the working route and one of the second labels for the standby route based on the information included in the message that has been circulated, wherein the message includes a first list of the first labels and a second list of the second labels, and the message receiving unit receives a message generated by the other transmission device, and the transmission device further includes a message updating unit that updates the message by excluding a first label allocatable to the transmission device from the first list when the transmission device is positioned on the working route, and by excluding a second label allocatable to the transmission device from the second list when the transmission device is positioned on the standby route.