JPH05167599A - Order wire control system in synchronizing network ring lan system - Google Patents

Abstract

PURPOSE:To simplify a constitution and to speed up the changes of the connection with the terminal of an order wire signal at the time of a fault by designating an order wire master node which makes an order wire a terminal at the time of a normal operation and moving the terminal of the order wire signal to the node of a fault detection part at the time of the fault. CONSTITUTION:At the time of a normal operation, a loop constitution is separated by defining one side of an order wire master node 1 as an order wire terminal part, and the communication of the order wire signal between the node 1 and order wire non-master nodes 2 to 4 is performed. When faults of line breaks, etc., occur between nodes 2 and 3, a change from a connection mode to a terminal mode as order wire signal terminal parts 6, 7 is performed on the detection line side in the nodes 2 and 3, and fault information S8 is transmitted. When the node 1 receives the S8, it changes from the terminal mode to the connection mode. Thus, the communication between all the nodes can promptly by performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to SONET (Synchron
ous Optical Network) or SDH (Synchronous Di
The present invention relates to an order wire control method in a synchronous network ring LAN system, which is a branch system of a digital network and automatically changes termination and connection of an order wire signal at the time of failure.

[0002]

2. Description of the Related Art Conventionally, in a SONET / SDH branch type synchronous network ring LAN system, in order wire control relating to the end of an order wire signal at a normal time and a failure, the terminal end portion of the order wire signal is fixed.
When a failure occurs, the data communication signal or the like is used to set the change of the terminal unit to each node by software control.

[0003]

The conventional order wire control system as described above has the drawbacks that a complicated control system is required and the switching time of the terminal end is increased.

The present invention solves such a problem, and simplifies the configuration, and at the same time, an orderwire control system in a synchronous network ring LAN system which can quickly change the termination and connection of an orderwire signal at the time of failure. The purpose is to provide.

[0005]

In order to achieve this object, the order wire control method in the synchronous network ring LAN system of the present invention sets the node numbers to all the nodes at the initial setting of the nodes constituting the system. ,and,
Setting means for setting the order wire master node by specifying one node number that terminates the order wire signal during normal operation, and the failure information indicating the failure location of the line or node in the system is sequentially transferred from the failure detection node to each node And a transfer means for transferring the termination part of the order wire signal from the order wire master node to the node of the failure detection part according to the initial setting and the failure information. It is characterized by performing.

Further, the above-mentioned configuration is SONET or S
It is characterized in that it is applied to the DH branch system.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an order wire control system in a synchronous network ring LAN system of the present invention will be described below with reference to the drawings.

1 and 2 show the configuration of the embodiment.
FIG. 1 shows a state during normal operation, and FIG. 2 shows a state during inter-node failure.

In FIG. 1 and FIG. 2, this example is a ring system having four nodes, and one of the four nodes is an orderwire master node 1 and the other three nodes are non-orderwire master nodes. It is set to 2, 3 and 4. Next, the operation of this configuration will be described.

First, the case of normal operation in FIG. 1 will be described.

The order wire master node 1 enters the order wire signal termination mode, and the line portion on one side serves as the order wire signal termination portion 5. The orderwire non-master nodes 2, 3, 4 are set to the connection mode of branch connection without terminating the orderwire signal. In this way, in normal operation, one side of the order wire master node 1 is used as the order wire signal terminating unit 5 to separate the loop configuration, and the order wire master node 1 and the order wire non-master nodes 2, 3, 3.
4, that is, order wire signal communication is performed between all nodes.

Next, a case where a failure such as a line break occurs between the order wire non-master node 2 and the order wire non-master node 3 will be described.

FIG. 2 shows a case where a fault such as a line break has occurred.

In FIG. 2, there is a case where communication is cut off between the order wire non-master node 2 and the order wire non-master node 3 and at the same time, a fault signal is mixed into the order wire signal. Order wire non-master node 2
In the order wire non-master node 3, the node is changed from the connection mode to the termination mode as the order wire signal terminating units 6 and 7 on the detection line side simultaneously with the detection of the failure.

Here, the order wire non-master node 2 and the order wire non-master node 3 send the fault information S8. Further, the other order wire master node 1 and the order wire non-master node 3 sequentially transfer the failure information S8. The order wire master node 1, which has received the failure information S8 from the order wire non-master node 2 or the order wire non-master node 3, changes from the termination mode to the connection mode. Then, the order wire signal is branch-connected.

As a result, the order wire signal terminating units 6 and 7 are provided between the order wire non-master node 2 and the order wire non-master node 3 that sandwich the fault occurrence point, and communication between all nodes becomes possible.

Further, at the time of recovery from a failure, the failure information S8 disappears, so that all nodes return to the initial state.

[0018]

As is apparent from the above description, according to the order wire control method in the synchronous network ring LAN system of the present invention, an order wire signal is terminated as an initial setting in each node constituting the ring system when the order wire signal is terminated. Set the wire master node to change the order wire signal termination mode at the failure detection node due to failure detection, and transfer the failure information to each node to change the order wire master node to the connection mode. Since the order wire signal communication is performed in the above, there is an effect that the configuration can be simplified and the order wire signal termination and connection can be changed quickly when a failure occurs.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration in an embodiment of an order wire control system in a synchronous network ring LAN system of the present invention.

FIG. 2 is a block diagram for explaining the operation of the embodiment and showing a state at the time of a failure between nodes.

[Explanation of symbols]

 1 Order wire master node 2,3,4 Order wire non-master node 5,6,7 Order wire signal terminal S8 Fault information

Claims (2)

[Claims] 1. When initially setting nodes constituting a system, node numbers are set for all nodes, and one node number for terminating an order wire signal during normal operation is designated and set as an order wire master node. A setting unit, a transfer unit that sequentially transfers fault information indicating a fault location of a line or a node in the system from the fault detection node to each node, and the initial setting and the fault information to order the end portion of the order wire signal. An order wire control method in a synchronous network ring LAN system, comprising: a transfer means for transferring from a wire master node to a node of a failure detection unit, and changing the termination and connection of an order wire signal at the time of failure. 2. An order wire control system in a synchronous network ring LAN system, wherein the configuration according to claim 1 is applied to a SONET or SDH branch system.