JPH05252158A - Line constitution information collection system - Google Patents

Abstract

PURPOSE:To automatize the collection of line constitution information and to reduce the work of an operator in a line constitution information collection system in a synchronous digital transmission network. CONSTITUTION:The transmission equipment 1 of a transmission terminal station on each line is provided with a means 2 which includes the information of the connecting state of the line in its own station, and transmits by generating a signal to collect line connection information to the line, and the transmission equipment 4 of a repeater station which relays the line is provided with a means 5 which attaches the information of the connecting state of the line in the transmission equipment of its own station on the signal, and transmits it again to the line. Also, the transmission equipment 7 of a reception terminal station on the line is provided with a means 8 which receives the signal transmitted on the line, and a means 9 which transmits the information included in the signal, and the information with respect to the connecting state of the line in the transmission equipment of its own station to a centralized managing station 11 via a line 10 for network control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for collecting line configuration information in a synchronous digital transmission network management system. SDH (Synchronous Digital Hierarchy), S
In a synchronous digital transmission network management system such as ONET (Synchronous Optical Network), it is necessary to collect the line configuration information that is the basic data when operating, maintaining and managing the line network. There is a demand for collecting information regarding the connection status in the transmission terminal station, the receiving terminal station, and the transmission devices installed in the relay station with a small amount of work.

[0002]

2. Description of the Related Art Conventionally, in a centralized control system for an asynchronous digital transmission network, a line configuration diagram (channel plan) is displayed on the screen of a maintenance terminal for network operation, maintenance and monitoring. To do. In order to display this line configuration diagram (channel plan), the centralized management system needs to collect information about the line configuration of the network. However, conventionally, an operator manually inputs this line configuration information.

[0003]

However, since the line configuration information becomes enormous as the line scale increases, the amount of work for manually inputting the line configuration information also becomes enormous, resulting in high cost and reliability. Cause a decrease in sex,
Further, there is a problem that it is not possible to flexibly deal with the change of the line configuration.

The present invention automates the collection of line configuration information, reduces the amount of work required for creating, inputting, confirming, and on-site adjustment of line configuration information, and improves the reliability of information collection. It is an object of the present invention to provide a line configuration information collection system that can flexibly respond to configuration changes.

[0005]

FIG. 1 shows the basic configuration of a line configuration information collecting system according to the present invention. According to the present invention, transmission lines 3 and 6 are provided between a plurality of stations each having a transmission device.
In the synchronous digital transmission network connected by, the central control station 11 for monitoring and controlling the synchronous digital transmission network has a transmitting terminal station and a receiving terminal station of each line set in the synchronous digital transmission network, Also, the present invention relates to a line configuration information collecting system for collecting information about a connection state in a transmission device of each station through which the line passes, and according to the present invention, as shown in FIG. Each of the plurality of stations is connected to the centralized management station 11 by the network control line 10, and the transmission device 1 of the station which is the transmission terminal station of each line includes information about the connection state of the line itself. The transmission device 4 of the relay station, which has the line connection information collection signal generation means 2 for generating the line connection information collection signal for collecting the line connection information and transmitting it on the line, When the above-mentioned line connection information collection signal is received through the line described above, the line connection information collection signal is added with information related to the connection status of the transmission device of the local station of the line, and the line connection information collection signal is transmitted again. The transmission device 7 of the station serving as the receiving terminal station of the above-mentioned line has the line connection information addition / signal relay means 5 for receiving the above-mentioned line connection information collection signal transmitted over the above-mentioned line. Connection information collection signal receiving means 8, and information on the connection state of the line in the transmission device of the transmission terminal station and relay station, which is included in the line connection information collection signal, and the line in the transmission device of the own station. It has a line connection information central transmitting means 9 for transmitting the information regarding the connection state of (1) to the central control station 11 via the network control line 10.

[0006]

According to the present invention, the line connection information collecting signal generating means 2 in the transmission device 1 of the transmitting terminal station of each line collects the line connection information including the information regarding the connection state of the line itself. To generate a line connection information collection signal for transmission to the line. In the transmission device 4 of the relay station that relays the line, when the line connection information collection signal is received via the line, the line connection information adding / signal relay means 5 transmits the line to the own station. Information regarding the connection state in the device is added to the line connection information collection signal and transmitted again on the line. Then, the transmission device 7 of the station which is the receiving terminal station of the above-mentioned line receives the above-mentioned line connection information collection signal transmitted through the above-mentioned line by the line connection information collection signal receiving means 8 and connects the line. Information about the connection state of the line in the transmission device of the transmission terminal station and the relay station, which is included in the line connection information collection signal by the information central transmission means 9, and the connection state of the line in the transmission device of the own station. The information regarding the above is transmitted to the central control station 11 through the network control line 10. Thus, according to the present invention, the information regarding the connection state of the line in the transmission terminal station and the receiving terminal station of each line and the transmission device of the relay station of the line is automatically collected without the operator's hand. Therefore, the amount of work is reduced and the reliability is improved. In addition, it is possible to flexibly deal with the change of the line configuration after the start of system operation.

[0007]

[Embodiment] The line configuration information (network database) required by the centralized monitoring system for a synchronous digital transmission network for network operation, maintenance, and monitoring is as follows:
There are the following four types. (1) Station information: Name and number of stations where digital transmission equipment is installed.

(2) Inter-station connection information: the number of branches of the transmission path of each station, connection destination, transmission medium, transmission speed, etc. (3) Line component information (monitored device information): The type and number of transmission devices installed in each station. (4) Line component connection information: The connection status of the transmission equipment installed in each station (which channel each line is connected to).

Of these, the line component connection information of (4) above is automatically collected by the line configuration information collection system of the present invention. Among the above four types of information, the line component connection information occupies most of the information amount.
Other information (1) to (3) can be manually
It shall be input to the maintenance terminal connected to the centralized monitoring system.

FIG. 2 shows a simple configuration example of a network for explaining the present invention. In FIG.
Each of A, B, C, D, E, F, G, and H is a node NE (station) of the network. And FIG.
Is from station C to station B in the network having the configuration of FIG.
It shows a channel plan for reaching the F station via the station, the D station, and the E station. The transmission device of each station is supposed to accommodate three DS3 signals of channel 1, channel 2, and channel 3, respectively, from station C to station B,
It is assumed that the stations between the station D and the station F via the station E are connected by STM-1 in SDH or OC-3 interface in SONET. In the channel plan of FIG. 3, the symbols of other stations such as “E” and “F” are shown at the three channels of a certain station because the DS3 signal is connected to that channel and This indicates that a line is set up as a terminal station and the other station indicated by the symbol is the opposite terminal station. According to the channel plan of FIG. 3, in the transmission apparatus of the C station, the signal of DS3 having the C station and the E station as opposite terminal stations is provided in the channel 1, and the C station and the F station are provided in the channel 2. A signal of DS3 serving as the opposite terminal station and a signal of DS3 serving as the opposite terminal station of C station and B station are respectively accommodated in the channel 3. The signal of DS3 connected to channel 1 of station C is transmitted to station B and D
After being relayed through the channel 1 of the transmission device of each station, the channel 1 of the station E is connected to the lower line.
Similarly, the signal of the DS3 connected to the channel 2 of the C station is relayed through the channel 2 of each of the transmission devices of the B station, the D station, and the E station, and then is transmitted to the lower channel of the channel 2 of the F station. Connected to the line. The signal of DS3 connected to channel 3 of station C is connected to the lower line in channel 3 of station B. Others are the same. FIG. 4 shows a configuration example in which a transmission device capable of accommodating three DS3s is connected to each station of FIG. Also in FIG. 4, "E" is displayed at the location of the three channels of a certain station.
Symbols of other stations such as “F” are shown when a line in which a DS3 signal is connected to the channel, the station is the terminal station, and the other station indicated by the symbol is the opposite terminal station. This indicates that it is set.

FIG. 5 shows the above-mentioned "line configuration information collection signal".
FIG. The transmitting terminal station of each line, for example, at the time of network start-up, when changing the line configuration, etc.
When receiving a command from the centralized control station, a line configuration information collection signal having the contents shown in FIG. 5 is sent to the line. At this time, as shown in FIG. 5, first, the transmitting terminal station, for example, station C in FIG. 3, determines its station address, type of transmission device, system number. (When one station has a plurality of systems), the type of interface (DS1, DS3, etc.), and the channel number that accommodates the line. A signal containing is transmitted for each channel. Among the above, the line configuration information collection signal transmitted from the channel 1 of the C station is added with the above informations (1) to (3) for the line in the respective stations in the B station and the D station, and is the receiving terminal station E. Received at the station. At the E station, the information added to the above line configuration information collection signal is
In addition to the above items 1 to 3 for the line in the local station, the information is transmitted to the central control station via a network control line (not shown) connected between each station and the central control station. The transmission to the central control station via the network control line may be performed by any communication method, for example, packet communication is performed.

The above-mentioned line configuration information collection signal is transmitted along the line by using the overhead bit which is superimposed corresponding to each line. FIG. 6 shows STM-1 in SDH or OC- in SONET.
3 shows a frame structure of three interfaces.
In the present embodiment, the signal of FIG. 5 is the byte indicated by Z1 among the bytes of the section overhead SOH of the frame of FIG. 6 and the virtual tributary VT.
The path overhead byte V5 of 1.5 (tributor unit VC-11) is used to transmit between stations.

FIG. 7 shows the procedure for writing the above-mentioned line configuration information collection signal in the case of the DS1 signal.
The following explanation will be made using SONET terms, but SD
The same applies to H. In FIG. 7, the above-mentioned line configuration information collection signal is first inserted into the path overhead byte V5 of the virtual tributary VT1.5 in the DS1 signal. Further, a virtual tributary pointer VT PTR is further superimposed on the virtual tributary pointer VT PTR.
By this multiplexing, a VT group (9 × 12 bytes) is formed, and further, this VT group (9 × 12 bytes) is formed.
Byte) is multiplexed and STS-1 path overhead POH is superimposed, thereby STS-1SP
E (Synchronous Payload Envelope) is formed. Then, next, the section overhead SOH is superimposed, but at this time, the line configuration information collection signal is also written in the Z1 byte of the section overhead SOH. Thus, the STS-1 frame is formed. As described above, in the case of the DS1 signal, the line configuration information collection signal is transmitted in each station by the path overhead byte V5 of the virtual tributary VT1.5, and
It is transmitted by using both Z1 bytes of the section overhead SOH.

FIG. 8 shows the procedure for writing the above-mentioned line configuration information collection signal in the case of a DS3 signal.
In FIG. 8, first, the STS-1 path overhead POH is superimposed on the DS3 signal, and the STS-1 SPE is added.
Is formed. Then, next, the section overhead SOH is superimposed, but at this time, the above-mentioned line configuration information collection signal is written in the Z1 byte of the section overhead SOH. Thus, the STS-1 frame is formed. An STS-3 frame is formed by multiplexing three STS-1 signals. This STS-3 signal is photoelectrically converted E / O and transmitted as an OC-3 signal through the optical transmission line.

[0015]

As described above, according to the line configuration information collecting system of the present invention, the collection of line configuration information is automated, and the amount of work required for creating, inputting, confirming the line configuration information and adjusting the site. Can be reduced and
This has the effect of improving reliability. In addition, it is possible to flexibly deal with the change of the line configuration after the start of system operation.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of the present invention.

FIG. 2 is a diagram showing a simple configuration example of a network for explaining the present invention.

FIG. 3 is a diagram showing a channel plan from a C station to a F station via a B station, a D station, and an E station in the network having the configuration of FIG. 2;

FIG. 4 is a diagram showing a configuration example in which a transmission device capable of accommodating three DS3s is connected to each station of FIG. 3;

FIG. 5 is a diagram showing a configuration example of a “line configuration information collection signal”.

FIG. 6 STM-1 or SON in SDH
It is a figure which shows the frame structure of the OC-3 interface in ET.

FIG. 7 is a diagram showing a procedure for writing the above line configuration information collection signal in the case of a DS1 signal.

FIG. 8 is a diagram showing a procedure for writing the above line configuration information collection signal in the case of a DS3 signal.

Claims (3)

[Claims] 1. A central control station (11) for monitoring and controlling a synchronous digital transmission network in which a plurality of stations each having a transmission device are connected by a transmission line (3, 6). ) Is a transmitting terminal station and a receiving terminal station of each line set in the synchronous digital transmission network, and
In a line configuration information collecting system for collecting information on a connection state in a transmission device of each station through which the line passes, each of the plurality of stations is connected to the central control station (11) by a network control line (10). The transmission device (1) of the station that is connected and serves as the transmission terminal station of each line generates a line connection information collection signal for collecting line connection information, including information about the connection state of the line itself. , A transmission device (4) of a relay station having a line connection information collection signal generating means (2) for transmitting on the line, and transmitting the line connection information collection signal via the line. When received,
The line connection information adding / signal relay means (5) for adding information on the connection status of the transmission device of the local station of the line to the line connection information collection signal and transmitting again to the line, The transmission device (7) of the station which is the receiving terminal station of the line connection information collection signal receiving means (8) for receiving the above-mentioned line connection information collection signal transmitted over the line, and the line connection information. The information about the connection state of the line in the transmission device of the transmission terminal station and the relay station and the information about the connection state of the line in the transmission device of the own station, which are included in the collected signal, are included in the network control line (10). A line configuration information collecting system characterized by having a line connection information central transmitting means (9) for transmitting to the central control station (11) via the. 2. The line configuration information collecting system according to claim 1, wherein the line connection information collecting signal is transmitted by using an overhead bit superimposed on the line. 3. The signal transmitted on the transmission line (6, 7) in the synchronous digital transmission network follows an SDH interface, and the line connection information collection signal is S
The line configuration information collecting system according to claim 2, wherein a spare bit of an overhead bit in DH is used.