Failure protection method and node apparatus

A failure protection method in which multiple working paths and a protection path connect between nodes, wherein

• a transmitter node transmits partial data respective to the multiple working paths by using the protection path,
• a receiver node switches a working path where a failure is detected to the partial data transmitted by using the protection path when the failure is detected,
• the transmitter node determines a bandwidth of the protection path which is assigned for the working path where the failure is detected at the receiver node, and
• transmits data of the working path where the failure is detected by using the bandwidth determined within the protection path.

A node apparatus in a network connecting between nodes by multiple working paths and a protection path, the node apparatus comprising:

• a determination part configured to determine an allocation bandwidth to allocate to a detected path where a failure is detected in multiple paths being set to the multiple working paths, depending on the detected path;
• a switch part configured to switch the detected path from one of the multiple working paths to the protection path;
• and
• transmission part configured to transmit data to be transmitted by the detected path, by using the allocation bandwidth determined within an entire bandwidth of the protection path.

A node apparatus in a network connecting between nodes by multiple working paths and a protection path, the node apparatus comprising:

• a first transmission part configured to transmit partial data respective to the multiple working paths by using the protection path;
• a switch part configured to switch a working path where a failure is detected to the partial data transmitted by using the protection path when the failure is detected;
• a determination part configured to determine a bandwidth of the protection path which is assigned for the working path where the failure is detected at the receiver node;
• and
• a second transmission part configured to transmit data of the working path where the failure is detected by using the bandwidth determined within the protection path.