| abstract |
The present invention eliminates the need for an identification flag or ET indicating that addition of a MAC address / encapsulation of a frame is performed. A bridge node converts a destination MAC frame into a RPR MAC frame and transmits the RPR MAC frame. A MAC frame addressed to a station outside the ring connected to another bridge node is encapsulated in an RPR MAC frame. Send. Accordingly, the bridge node receives the RPR MAC frame in which the MAC frame is encapsulated, and the station node receives the RPR MAC frame in which the MAC frame is not encapsulated. [Selection diagram] FIG. |