Method of setting bidirectional path, and communication system and node device for providing the same

A method of setting a bidirectional path to a first node in a network, comprising:

• receiving from the first node a first path message including a record of a route through which the first path message is passed from the first node;
• and
• transmitting a second path message including a route specification determined based on the record of the route included in the first path message.

A communication system for communicating data between a first node and a second node in a network, comprising:

• first path establishing means for establishing a first path from the first node to the second node by a first path establishing procedure including transferring a first path message including a record of a route through which the first path message is forwarded from the first node to the second node;
• and,
• second path establishing means for establishing a second path from the second node to the first node along the route of the first path in the backward direction, by a second path establishing procedure including transferring, from the second node to the first node, a second path message including a route specification determined based on the record of the route included in the first path message received by the second node.

A node device for setting a bidirectional path to a first node in a network, comprising:

• means for extracting, when receiving from the first node a first path message including a record of a route through which the first path message is passed from the first node, the record of the route from the first path message;
• and
• means for transmitting to the first node a second path message including a route specification determined based on the record of the route included in the first path message.