JPH08102786A - Network management system - Google Patents

Abstract

PURPOSE: To provide a flexible network capable of normally executing a command in a different system even when congestion is generated in one system, facilitating supervisory and control such as the cause investigation of the congestion and the segmentation of a fault, etc., and coping with the emergency degree of the command. CONSTITUTION: A CONT (supervisory and controlling device) 20 is provided with communication lines connected to a DCS (cross-connection device) 10 for the respective plural systems (a) and (b) and the DCS 10 is provided with communication means 11a and 11b with the CONT 20 and routing processing means 12a and 12b along with optical signal termination parts 41a and 41b-4na and 4nb for the respective plural systems (a) and (b). By the constitution, the CONT 20, the plural DCSes 10 and 31 or the like and plural LTMs 3n or the like are mutually connected by an active system and a standby system and the plural complete systems (a) and (b) realized by using the overhead of transmission frames are constructed while forming a redundant system within the same network. As a result, management information is routed independently in the respective systems.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network composed of a terminating device for terminating signals and a cross-connect device for interconnecting signals, and a supervisory control device for sending management information to the cross-connect device. In particular, the present invention relates to a network management system which can easily monitor and control each of a plurality of systems forming a redundant system and can provide a flexible network which can respond to the urgency of a command.

[0002]

2. Description of the Related Art Generally, a network of this type (hereinafter referred to as a network) has at least one terminating device that terminates a signal and at least one cross-connect device that is connected to the terminating device and interconnects the signals. And are connected to the opposite device by two communication paths forming a redundant system with each other. In addition, the network includes a monitoring control device connected to the cross-connect device and transmitting management information to the cross-connect device, and is managed by the monitoring control device.

Conventionally, in this type of network management system, as shown in FIG. 3, a plurality of cross-connect devices (hereinafter referred to as DCS) which form and connect dual communication paths in a loop.
And a plurality of signal terminating devices (hereinafter referred to as LTMs) connected to the DCSs by double communication paths, respectively. The network is connected to the opposing device by two systems forming a redundant system with each other. , Monitoring and control equipment (hereinafter CO
92), which is called NT), connects one communication path to the DCS 91, sends monitoring information, and performs monitoring control.

Here, it is assumed that a system a and a system b are provided in the dual communication path, one of which is used as an active system and the other of which is used as a standby system.

The DCS 91, as shown in FIG.
DCS3 other than ONT92 that forms a loop communication path
1, 32 and LTMs 33 to 3n that terminate optical signals.

[0006] As shown in FIG. 4, the DCS 91 includes a CONT communication unit 93, a routing processing unit 94,
A management information processing unit 95, a cross-connect processing unit 50, and frame processing units 41 to 4n are provided, and each of the frame processing units 41 to 4n is provided with two optical signal terminal units 41a and 4n.
1b to 4na and 4nb.

The CONT communication means 93 sends the command received from the CONT 92 to the routing processing section 94. The routing processing unit 94 checks the destination of the received command, and when determining that the received command is addressed to itself, sends the received command to the management information processing unit 95. The management information processing unit 95 performs a process according to the received command.

On the other hand, when the destination of the received command is not addressed to itself, the routing processing unit 94 specifies one LTM (for example) 3n corresponding to the destination of the command from the network configuration and is connected to this LTM 3n. The frame processing means 4n sends the received command to the optical signal terminating unit 4na which is currently operating as an active system (for example, in the case of system a). When the system b is the active system, it becomes the optical signal terminating unit 4nb.

The optical signal terminating unit 4na forms the received command in a transmission frame and transfers the generated transmission frame to the LTM 3n of the communication destination by using the section overhead which is the overhead of this transmission frame. LTM3
n reproduces a command from the overhead of the received transmission frame, assembles and processes the command.

An LTM whose destination is accommodated in another DCS,
For example, when the opposing DCS 31 in FIG. 3 is specified as the destination, the optical signal terminator 41a creates and transmits a transmission frame to the DCS 31. DCS31 which received the transmission frame
In the optical signal termination unit, the command is reproduced and assembled from the overhead of the received transmission frame by the procedure reverse to that of the DCS 91 described above, and the routing processing unit checks whether the command is addressed to itself.

In this way, the management information is transferred from the CONT to the network, and the monitoring control by the CONT is possible.

It should be noted that the cross-connect processing unit 50
, DCS3 connected to DCS91
1, 32 and the frame processing means 41 to 4n directly connected to the LTMs 33 to 3n are connected to each other to process signal transfer.

[0013]

In the above-mentioned conventional network management system, the routing processing unit of the DCS transfers the management information from CONT using the system currently working as the active system. When the managed network is congested, not only general commands but also control commands cannot be sent, and as a result, it is difficult to investigate the cause of network congestion and to take early countermeasures by isolating faults. There is a point.

[0014]

A network management system according to the present invention is a network management system including a terminating device, a cross-connect device and a supervisory control device, wherein a redundant system is formed between the cross-connect device and the supervisory control device. The monitor control device can be connected by a plurality of communication paths, and the monitoring control device can send the monitoring information to the remaining communication paths serving as the standby system while operating one of the plurality of communication paths as the active system.

The cross-connect device connected to the monitoring and control device includes a CONT communication means for communicating with each of the communication paths forming a redundant system with the monitoring and control device, and a connection to each of the CONT communication means. CONT
A routing processing unit that performs transfer destination determination processing of management information received from the monitoring control device via the communication unit and all the routing processing units, receives the management information from the routing processing unit, and receives the management information addressed to itself. A management information processing unit that performs processing, and is provided for each of the terminal devices or cross-connect devices that are accommodated and connected, and terminates signals between these terminal devices or cross-connect devices, and is connected to all routing processing units, It is provided with a frame processing means for sending the management information from the supervisory control device to the transfer destination, and a cross-connect processing part for interconnecting signals between the connected devices between the frame processing means.

The supervisory control device forms a redundant system by providing a plurality of communication paths for sending an input command to the cross-connect device, and selects and sends a standby communication path for a command of high urgency. ing.

[0017]

Next, the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are a functional block diagram and a network configuration diagram showing one embodiment of the present invention.

In the network shown in FIG.
The ONT 20 is connected to the DCS 10 by a dual communication path between the system a and the system b for the two systems, the working system and the standby system.
Are connected to form a redundant system. The arrangement of each device forming the network is similar to that shown in FIG. 3, and DCSs 10, 31, which form a double communication path of the system a and the system b in a loop shape
32 and LTM 33 to 3n terminating the optical signal are DCS
10 is assumed to be connected.

As shown in FIG. 1, the DCS 10 is connected to the CONT 20 by two communication paths of a system a and a system b, and the CONS communication means 11a and 11b, the routing processing units 12a and 12b, and the management information processing unit 13 , Frame processing means 41 to 4n, and cross-connect processing unit 50
It has. Each of the frame processing means 41 to 4n includes two optical signal terminating units 41a and 41b to 4n of a system a and a system b.
a, 4 nb. The difference from FIG. 4 is that CONT
Communication means 11a, 11b and routing processing unit 12
It is to have two a and 12b, respectively. These CONT communication means 11a, 1
1b and the routing processing units 12a and 12b are duplicated.

First, the CONT 20 checks the urgency of the generated command, and normally sends the command to one of the two communication channels currently operating as the active system. On the other hand, for commands with high urgency, CO
The NT 20 drives a communication channel that is currently inactive as a standby system, sends a command to this communication channel, and causes the destination to receive it urgently, thereby shortening the time required to start processing the command in the network. .

Each CONT communication means 11a of the DCS 10
11b sends the command received from CONT 20 to the corresponding routing processing units 12a and 12b. Each of the routing processing units 12a and 12b checks the destination of the received command, and sends the received command to the management information processing unit 13 when it is determined that the destination is addressed to itself. Management information processing unit 1
3 performs processing according to the received command.

On the other hand, if the destination of the received command is not addressed to itself, the routing processing units 12a and 12b
One LTM (for example) 3n corresponding to the destination of the command is specified from the network configuration, and the frame processing means 4n connected to this LTM 3n corresponds to the routing processing unit (for example, in the case of system a) 12a that received the command. The received command is sent to the optical signal terminating unit 4na. That is, the system a of the optical signal termination unit 4na that received the command is CO
Although specified by NT20, it is assumed that the system can operate regardless of the current active system or standby system.

As described with reference to FIG. 4, the optical signal terminator 4na forms the received command into a transmission frame, and transmits the generated transmission frame using the section overhead which is the overhead of the transmission frame. Transfer to the previous LTM3n. The LTM3n reproduces the command from the overhead of the received transmission frame, assembles and processes the command.

An LTM whose destination is accommodated in another DCS,
For example, when the opposing DCS 31 in FIG. 2 is specified as the destination, the optical signal termination unit 41a creates and transmits a transmission frame to the DCS 31. DCS31 which received the transmission frame
Is a DCS 31 by a procedure reverse to that of the DCS 91 described above.
In the optical signal termination unit, the command is reproduced from the overhead of the received transmission frame and assembled, and the routing processing unit checks whether the command is addressed to itself.

Further, the frame processing means 41 has two optical signal terminating portions 41a and 41b of the system A and the system b, and the optical signal terminating portions 41a and 41b which receive the transmission frame from the connected DCS 31 are set to one. Switch to one and, as shown in FIG. 2, the connected DCS 32 or the accommodated LTM 3
A command to be transferred to 3 to 3n is fetched from the transmission frame received from the DCS 31, and the cross-connect processing unit 50
Send to The cross-connect processing unit 50 connects the DCSs 31 and 32 connected to the DCS 10 and the frame processing units 41 to 4n directly connected to the LTMs 33 to 3n, respectively, and processes signal transfer.

As described above, the CONT 20 designates the system and sends a command for monitoring and control to the communication path to the DCS 10. Therefore, it is possible to independently route the management information in each of the two systems.

In the above description, there are two systems, the active system and the standby system, but more systems may be provided. In addition, the supervisory control device (CONT) checks the urgency of the command that has occurred, and drives a communication channel that is currently idle as a standby system for the command with a high urgency and sends a command to this communication channel. I explained that I will send it out and make it urgently accepted at the destination,
Another selection method such as the service content of the command may be adopted. Furthermore, although the functional blocks are illustrated and described, the functions may be freely separated and merged as long as the above-described comprehensive functions can be exhibited, and the above description does not limit the present invention.

[0029]

As described above, according to the present invention, the supervisory controller (CONT) is a cross-connect device (DC).
Each system has a communication path connected to S), and this DCS is provided with communication means for communicating with CONT and processing means for routing in each system together with a signal terminating portion. With this configuration, CONT, DCS, and L
A plurality of complete systems connecting TMs will be constructed in the same network. As a result, management information can be independently routed in each system. Therefore, even if one system becomes congested, it becomes possible to execute commands normally in another system, and it becomes easy to monitor the causes of congestion, isolate faults, etc., and start work. A network management method that enables an early measure that can shorten the time required for the network management can be obtained.

Further, by making the management network redundant, if the system used by the high urgent command and the low urgent command from the supervisory control device (CONT) is to be distinguished, the throughput of one of the networks is reduced. By controlling the use of the other network even in a state of being lowered, it is possible to provide a flexible network that can respond to a command having a high degree of urgency.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment of the present invention.

FIG. 2 is a network configuration diagram showing an embodiment of the present invention.

FIG. 3 is a network configuration diagram showing an example of the related art.

FIG. 4 is a functional block diagram showing an example of the related art.

[Explanation of symbols]

 10, 31, 32 Cross-connect device (DCS) 11a, 11b CONT communication means 12a, 12b Routing processing unit 13 Management information processing unit 20 Monitoring and control unit (CONT) 33-3n Signal termination unit (LTM) 41-4n Frame processing unit 41a, 41b to 4na, 4nb Optical signal termination unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location H04L 12/28 H04M 3/00 D

Claims (3)

[Claims] 1. At least one terminating device that terminates signals, at least one cross-connect device that is connected to the terminating device and interconnects signals, and that is connected to the cross-connect device. In a network management method including a monitoring control device that sends management information to the cross-connect device and the monitoring control device are connected by a plurality of communication paths forming a redundant system, the monitoring control device, A network management method characterized in that monitoring information can be sent to the remaining communication paths that are standby systems even while one of the communication paths is operating as an active system. 2. The CONT communication unit according to claim 1, wherein the cross-connect device connected to the supervisory control device communicates with each of the supervisory control devices through communication paths connected to form a redundant system, and the CONT. A routing processing unit that is connected to each of the communication units and performs a transfer destination determination process of the management information received from the monitoring control device via the CONT communication unit, and is connected to all the routing processing units, A signal is transmitted between a management information processing unit that receives management information and processes the management information addressed to itself, and the termination device or the cross-connect device that is provided for each of the termination device or the cross-connection device that is accommodated and connected. Is connected to all the routing processing units and sends the management information from the monitoring control device to the transfer destination. A network management system comprising: frame processing means; and a cross-connect processing section for interconnecting signals between the connected devices between the frame processing means. 3. The supervisory control device according to claim 1, wherein a redundant system is formed by providing a plurality of communication paths for sending an input command to the cross-connect device, and a standby system for a command with a high degree of urgency. A network management method characterized by selecting and transmitting the communication path.