Ring network system capable of detecting an alarm in each node
AssigneeNEC Corporation
InventorShunji Yoshiyama
Life of this patent
Estimating the term…
Abstract
In a ring network system formed by a plurality of nodes connected to one another through a ring-shaped path, each of the nodes collects all of node information signals representative of states of the nodes and memorizes the node information signals in a node information signal memory included in each node. The node information signal is periodically transmitted to each node from an adjacent one or ones of the nodes through the ring-shaped path and is renewed from time to time. Such collection of all of the node information signal in each node makes it easy to check an alarm by a superintendent.
Claims20
A ring network system comprising a plurality of nodes which are connected to one another through a ring connection, said ring network using a communication overhead to pass overhead information between nodes wherein said communication overhead is in addition to a main communication signal, each one of said nodes comprising:
- node information signal producing means for producing a node information signal representative of a state of said each one of said nodes;
- a node information signal memory for memorizing the node information signals of all of said nodes;
- receiving means connected to said ring connection for successively receiving the node information signals of the other nodes through an adjacent one of the nodes by extracting a packet from said communication overhead;
- and
- control means for controlling said node information signals by extracting said node information signals from said packet for provision to said memory;
- wherein all of said nodes are caused to memorize said node information signals of all of the nodes into respective node information signal memories.
A method for use in a ring network system which comprises a plurality of nodes connected to one another through a ring connection, said method being for collecting, in each of said nodes, node information signals sent from each of said nodes via a communication overhead and comprising the steps of:
- preparing a node information signal memory, in each of said nodes, which memorizes the node information signals sent from the respective nodes;
- initially memorizing the node information signal of each of said nodes into the node information signal memory in each of said nodes;
- receiving the node information signals of the other nodes through an adjacent one of the nodes adjacent to each of the nodes by extracting a packet from said communication overhead;
- and
- memorizing the node information signals of all of said nodes, which are extracted from said packet, into the node information signal memory in each of said nodes.
An optical ring network system for use in telephony, said optical ring network system comprising a plurality of nodes which are connected to one another through a ring connection, and said optical ring network using a communication overhead to pass overhead information between nodes wherein the communication overhead is in addition to a main communication signal, each one of said nodes comprising:
- node information signal producing means for producing a node information signal representative of a state of said each one of said nodes;
- a node information signal memory for memorizing the node information signals of all of said nodes;
- receiving means connected to said ring connection for successively receiving the node information signals of the other nodes through an adjacent one of the nodes by extracting a packet from said communication overhead;
- and
- control means for controlling said node information signals by extracting said node information signals from said packet for provision to said memory;
- wherein all of said nodes are caused to memorize said node information signals of all of the nodes into respective node information signal memories.
A method for use in an optical ring network telephony system which comprises a plurality of nodes connected to one another through a ring connection, said method being for collecting, in each of said nodes, node information signals sent from each of said nodes via a communication overhead and comprising the steps of:
- preparing a node information signal memory, in each of said nodes, which memorizes the node information signals sent from the respective nodes;
- initially memorizing the node information signal of each of said nodes into the node information signal memory in each of said nodes;
- receiving the node information signals of the other nodes through an adjacent one of the nodes adjacent to each of the nodes by extracting a packet from the communication overhead;
- and
- memorizing the node information signals of all said nodes, which are extracted from said packet, into the node information signal memory in each of said nodes.
Dependencies are inferred from the claim text.