Patent ID: 7826400
Filing Date: 2010-11-02
Classification: H04L

Abstract:
1. A packet ring network system including: a plurality of packet ring networks to which nodes are brought into ring form connection so that a packet inside a ring obtained by encapsulating a client packet, which a terminal outside the packet ring network transmits, is transmitted and received in a packet ring network, wherein a first packet ring network is included; a plurality of subpacket ring networks being packet ring networks connected to the first packet ring network through an interlink being a packet transport pathway used for client packet transport between the packet ring networks is included; the interlink is provided to each of the subpacket ring networks connected to the first packet ring network; the first packet ring network and each of the subpacket ring networks comprise an interlink node being a node connected to an interlink; each of the subpacket ring networks is connected to another subpacket ring network through a bypass pathway being a packet transport pathway used for client packet transport when a fault occurs in an interlink; each of the subpacket ring networks comprises a bypass pathway node being a node connected to a bypass pathway to another subpacket ring network; the bypass pathway node starts transport of a client packet with a bypass pathway in the case where a fault occurs in an interlink between a subpacket ring network to which a self-node belongs and the first packet ring network or in an interlink between a subpacket ring network to which a bypass pathway node connected to the self-node through a bypass pathway belongs and the first packet ring network; wherein the interlink node comprises: wherein the bypass pathway node comprises: