Patent ID: 7095714
Filing Date: 2006-08-22
Classification: H04J,H04L,Y04S

Abstract:
1. A ring interconnection network system having a plurality of ring networks which have a plurality of nodes and a transmission line connecting these nodes in a ring and a plurality of connection parts which connect the plurality of ring networks to each other, said ring interconnection network system comprising: a first self-healing function which, when a failure has occurred in said ring networks, forms a shortest communication route to avoid the failure; a second self-healing function which, when a failure has occurred in said connection parts, forms a communication route to avoid the failure, wherein said second self-healing function forms routes for transmitting the same signal in at least two of said plurality of connection parts beforehand and, when a failure has occurred in the connection parts, switches between these routes to form a communication route for avoiding said failure; switching control means for causing said first self-healing function and said second self-healing function to function in cooperation with each other without contradiction; a first and a second ring network each of which includes a plurality of nodes including a first and a second interconnection node and a transmission line connecting these nodes in a ring; a first interconnection line which connects a first interconnection node of said first ring network and a first interconnection node of said second ring network to each other; and a second interconnection line which connects a second interconnection node of said first ring network and a second interconnection node of said second ring network to each other, wherein: said second self-healing function gives the first interconnection nodes of said first and second ring networks the right of selecting traffic from either said transmission line or said interconnection line to form routes for transmitting the same signal in said first and second interconnection lines; and in a case where a traffic switching request has occurred in a segment other than the segment between said first and second interconnection nodes in said first ring network and the place where the request has occurred relates to a path interconnecting said first and second ring networks, said second self-healing function, when said first self-healing function has operated according to said request, transfers said right of selecting traffic from said first interconnection node to said second interconnection node in said first ring network.