Patent ID: 7436784
Filing Date: 2008-10-14
Classification: H04L

Abstract:
1. A resilient packet ring (RPR) network system in a RPR network, comprising: a plurality of station nodes terminating media access control (MAC) frames; and a plurality of bridge nodes forwarding MAC frames, in which both of the plurality of station nodes and the plurality of bridge nodes are located in one or more ringlets, wherein each of the station nodes, in the case of transmitting a MAC frame to other station node, transmits a RPR MAC frame in which a MAC address of the other station node is set as a destination MAC address, and transmits, in the case of transmitting a MAC frame to a station accommodated to a bridge node and located in the outside of the ringlets, a RPR MAC frame into which the MAC frame is encapsulated in such a state that the bridge node can capture the MAC frame, each of the bridge nodes, in the case of receiving, from a station accommodated to the bridge node itself and located in the outside of the ringlets, the MAC frame in which a MAC address of a station accommodated to other bridge node and located in the outside of the ringlets is set as a destination address, transmits a RPR MAC frame into which the MAC frame is encapsulated in such a state that the other bridge node can capture the RPR MAC frame, and, in the case of receiving, from a station accommodated to the bridge node itself, a MAC frame in which a MAC address of a station node is set as a destination MAC address, converts the MAC frame into a RPR MAC frame and transmits the RPR MAC frame, each of the station nodes captures the RPR MAC frame that the MAC frame is not encapsulated, and each of the bridge nodes captures the RPR MAC frame into which the MAC frame is encapsulated, and transmits the MAC frame within the captured RPR MAC frame to a station accommodated to the bridge node itself and located in the outside of the ringlets.