JPH0936882A - Line connection revision system for sonet transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect the line connection by analyzing a request command from a terminal equipment, selecting a line connection command corresponding to the request so as to control a line connection block, thereby minimizing the occurrence of service line interruption in the case of configuration revision. SOLUTION: An HMI control section 2 analyzes a request command from a terminal equipment 1 and requests its execution to a main control section 4. The main control section 4 controls the execution of the request from the HMI control section 2. The main control section 4 contains a line class command table 30 including plural line connection command functions and a line connection information management section 31 storing line connection information served at present. Thus, the main control section 4 provides an optimum command to line connection for a line connection block, based on the command from the terminal equipment 1, reduces service line interruption to the utmost in the case of configuration revision so as to protect the line connection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line connection changing system for SONET transmission devices. In recent years, due to advanced information technology, there has been a demand for larger capacity and higher speed of communication lines. Therefore, the system maintainer can select the configuration and change / set it as necessary. However, since it is necessary to disconnect the line connection during service when changing the configuration, it is necessary to shorten the service line stage caused thereby. Also, it is necessary to protect the system from accidentally changing or disconnecting the line connection.

[0002]

2. Description of the Related Art SONET is a synchronous network defined by the Bellcore standard. FIG. 17 is a block diagram showing a configuration example of a conventional system of this type. In the figure,
Reference numeral 100 denotes a terminal device (transmission device) that transmits information about a user's telephone, FAX, etc. to SONET format information to another relay device through a high-speed line such as an optical transmission line. The terminal station device 100 is adapted to upgrade its function (upgrade) at any time. This is to incorporate the latest functions. Reference numeral 1 is a terminal for inputting various commands such as line connection change / line disconnection to the terminal device 100, and the terminal 1 is provided with a command input keyboard and a monitor display. Reference numeral 2 is an HMI control unit having an interface function with the terminal 1 for analyzing a command input from the terminal and notifying the main control device. Terminal 1
The HMI control unit 2 and the HMI control unit 2 are connected by a communication line 3 of the RS232C serial data transfer system.

Reference numeral 4 is a main control unit for controlling the entire terminal equipment 100, and is composed of a CPU. The HMI control unit 2 and the main control unit 4 are connected by a communication line 5 of HDLC protocol which is a high level data link control procedure. Reference numeral 7 denotes an interface unit having a function as an interface for transmitting various commands output from the main control unit 4 by software to the hardware components. The interface unit 7 and the main control unit 4 are connected by an interface communication line 6.

Reference numeral 8 is a high-speed transmission line for transmitting high-speed data having an information transmission speed of 85 Mbps, and 9 is a high-speed service line terminating unit for terminating the high-speed transmission line 8.
When the high-speed transmission line 8 is, for example, an optical fiber or the like, the high-speed service line termination unit 9 has an optical / electrical conversion function and an electric / optical conversion function. Terminal device 10
This is because within 0, it is necessary to convert the optical information into an electric signal in order to process it with the electric signal. A switching unit 10 is connected to the high speed service line terminating unit 9 and rearranges the channels. The figure shows an example in which two high speed service line termination units 9 are provided, # 1 and # 2.

The main control unit 4 gives an instruction to the high speed service line terminating unit 9 and the switching unit 10 via the interface unit 7. 11
Is a low-speed service line terminating unit, and the low-speed service line terminating unit 11 includes a subscriber terminal 12
Alternatively, the exchange 13 is connected. A metallic line is usually used for the low-speed transmission line 13 connecting the low-speed service line terminating unit 11, the terminal 12, and the switching center 13, but in some cases, an optical fiber may be used. is there. Low speed service line termination unit 1
1 and the subscriber terminal 12 may be directly connected or may be connected via the exchange 13. These low speed service line termination units 11 are # 1 to # in the figure.
Although the case where 3 pieces of 3 is provided is shown, it is not limited to this. The switching unit 10 is connected to the high speed service line terminating unit 9 and the low speed service line terminating unit 11 to perform channel rearrangement,
Information is distributed to each transmission line.

In the system configured as described above,
For example, it is assumed that a call is made from the subscriber terminal 12. This call request enters the switching center 13 or directly to the low speed service line termination unit 11. And the switching unit 10
Puts the input calling information on the high-speed service line terminating unit 9, converts it into a high-speed signal in the high-speed service line terminating unit 9, and converts it from an electric signal into an optical signal. To another relay station or terminal device.

On the other hand, the call information that has entered the terminal device 100 from the high-speed transmission line 8 enters the high-speed service line terminating unit 9, is converted into an electric signal by the high-speed service line terminating unit 9, and is then switched. Enter unit 10,
The slots are switched by the switching unit 10, and the low-speed service line terminating unit 11 is entered so as to be placed on a predetermined low-speed transmission line 14. The low speed service line terminal unit 11 sends the call information to the target subscriber terminal 12.

18 and 19 are diagrams showing an example of the system configuration of a SONET network. The same components as those in FIG. 17 are denoted by the same reference numerals. FIG. 18A shows the terminal device 100.
Shows an example in which is connected point-to-point by the high-speed transmission line 8. As the high-speed transmission line 8, a SONET-compliant optical fiber cable (OC3) of 150 Mbps is used. HG1 and HG2 are high speed service line terminating units, and LG1 to LG3 are low speed service line terminating units. The high speed transmission line 8 is connected between the high speed service line terminating units of each station. The low speed service line termination unit is connected to a switching center or a subscriber terminal of a subscriber system. The low speed service line terminating unit and the subscriber system are connected to DS1 (1.5 Mbps electric signal), D
S3 (electrical signal of 50 Mbps), OC3 (150 Mbps)
ps optical signal), EC1 (SONET standard 50 Mbps)
s electric signal) and OVTG (2 Mbps optical signal).

FIG. 18B shows an example in which the terminal devices 100 are connected in series by the high speed transmission line 8. The same reference numerals as those in (a) are the same as those in (a). On the other hand, in the system shown in FIG. 19, the terminal device 100 uses the high-speed transmission line 8
Are connected in a ring shape. In this case, OC12 (600 Mbps optical signal conforming to SONET) is used for the high-speed transmission line in addition to the OC3. As described above, various configurations can be considered for the connection form of the SONET network.

[0010]

As described above, in the conventional SONET system, when the configuration is changed, it is usual to disconnect all the currently connected line connection states. Since the line connection operation was performed again after the configuration change, the configuration change took several seconds to several minutes, and the service line was interrupted during that time. Here, the line means a communication line or a transmission line for information transmission of the communication path system described in FIG.

Further, since there is no line protection function, even if the line is accidentally disconnected, it cannot be protected. The present invention has been made in view of the above problems, and provides a line connection changing system for a SONET transmission device capable of minimizing the service line disconnection when changing the configuration and protecting the line connection. The purpose is to do.

[0012]

FIG. 1 is a block diagram showing the principle of the present invention. The same components as those in FIG. 17 are denoted by the same reference numerals. In the figure, 2 is an HMI control unit that analyzes a request command from the terminal 1 and issues an execution request to the main control unit, and 4 is a main control unit that controls the execution of the request from the HMI control unit 2. The main control unit 4 includes a line type instruction table 30 including a plurality of line connection instruction functions, and a line connection information management unit 31 that stores line connection information currently in service.
Is built-in.

As shown in the figure, the line type instruction table 30 stores functions such as a line connection instruction for multiplexing / demultiplexing of BPs and a line connection instruction for multiplexing / demultiplexing of Bbps. Reference numeral 20 is a service line terminating unit, one of which is connected to the service line 15 and terminates the service line 15, and 21 is a multiplexing / separating unit which is connected to the service line terminating unit 20 and multiplexes / separates signals.

Here, the correspondence between FIG. 1 and FIG. 17 will be described. 1 and the service line terminating unit 20 are shown in FIG.
Of the high-speed service line terminating unit 9 or the low-speed service line terminating unit 11. The multiplexing / demultiplexing unit 21 in FIG. 1 shows a part of the function of the switching unit 10 in FIG. The main control unit 4 of FIG.
Of the main control unit 4. The line connection section is between the service line termination unit 20 and the multiplexing / demultiplexing unit 21 shown in FIG. The main control unit 4 gives a line change / disconnection instruction to the line connection section.

With such a configuration, the main control 4 can give an optimal instruction for connection of the line in the line connection section by an instruction from the terminal 1, and a service for changing the configuration. Line disconnection can be minimized and line connection can be protected.

In this case, the HMI controller 2
Analyzes the request by the command from the terminal 1, determines whether or not all the conditions for executing the request are satisfied,
If it is executable, the execution request is issued to the main control unit 4,
The main control unit 4 which has received the execution request, the line connection information management unit 3
Search for 1 to get the line connection information currently in service,
Connect the line connection section according to the line connection instruction according to the input and output destination information of the line currently in service,
After the line connection process was completed, the line that was connected before the process was disconnected.

As a result, the speed unit of the line connection is, for example, the service line A / line speed Nb without changing the physical medium.
It is possible to change the line connection from the ps to the service line B / line speed Mbps in the in-service state (while continuing the service).

The switch function unit composed of the service line termination unit 20 and the multiplexing / demultiplexing unit 21 and the physical medium having a plurality of information transmission rates belonging to the service line termination unit 20 serve as the switch function unit. In a configuration in which they are connected in a redundant state, the main control unit 4 gives a command to the switch function unit so that the physical media of one system can be replaced in order.

As a result, the line connection can be changed in the in-service state. In addition, the switch function unit including the service line termination unit 20 and the multiplexing / demultiplexing unit 21 and the physical medium having a plurality of information transmission rates belonging to the service line termination unit 20 are in a redundant state with the switch function unit. In the connected configuration, in the main control unit 4,
A converter having a function of changing the contents of the register for storing the line connection information is provided, and the main controller 4 gives a command to the converter to control the switch function unit to switch the line. I chose

Thus, without disconnecting the line,
And the line connection can be changed in the in-service state. Further, the switch function unit is provided with a buffer memory for temporarily saving data, and the physical medium is provided with a data storage unit and a version storage unit for storing the version of the stored data. Main control unit 4
When switching from one version of physical media to a new version of physical media,
When the data section of the newly connected physical medium is generated after being saved in the buffer memory, the data section that can be commonly used by both of the data stored in the buffer memory is used as the new physical medium. The initial value data of the new version is set for the data that cannot be used by both parties.

As a result, when the physical medium is replaced, the data can be taken over in a form closer to the one currently in service operation. Also, the service line termination unit 20
Is equipped with a line connection unit consisting of a high-order group signal terminating unit and a low-order group signal terminating unit, and when switching the connection between the high-order group signal terminating unit and the low-order group signal terminating unit, A time slot unit that mediates between the signal terminating unit and the low-order group signal terminating unit and a register that controls the connection of the time slot unit are provided, and the main control unit 4 is provided with a conversion unit that controls writing of the contents of the register. The conversion unit refers to the information in the register and rewrites the contents of the register in response to a connection switching request, thereby switching the connection between the high-order group signal terminating unit and the low-order group signal terminating unit.

As a result, when changing the line connection source / destination without changing the physical medium, the procedure of disconnecting / resetting the line connection becomes unnecessary. Further, the line connection unit is configured such that switching is performed by a register, and a protection unit for storing information on whether or not line connection / line disconnection is stored is provided in the main control unit 4. The information stored in the protection unit is used to determine whether to update the register of the line connection unit.

Thus, when the service is provided while the line is connected, it is possible to protect the line from being accidentally changed / disconnected. Further, the main control unit 4
An alarm unit for determining whether the connection is good or bad is provided therein by referring to the information in the register of the line connection unit.

Thus, when the line is connected and the service is provided, the fault information can be notified when an abnormality occurs such as when the line is accidentally disconnected.

[0025]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is an operation explanatory diagram of the first embodiment of the present invention. The same thing as FIG.
The same reference numerals are given. As the service line 15,
For example, SONET standard compliant STSI line (50Mbp
s electric signal line), and the line 16 separated by the multiplexer / demultiplexer 21 is, for example, a SONET standard-compliant VTI line (1.544 Mbps electric signal line). In the figure, ○ indicates the connection point of the STSI line currently in service (connection point of the line currently in service), and ● indicates the VTI.
It is the connection point of the line (the connection point increased by the configuration change). The operation of the system configured as described above will be described below.

When a connection change request is issued from the terminal 1, this request enters the HMI control unit 2. The HMI control unit 2 analyzes the request command from the terminal 1 and checks whether all executable conditions are satisfied. When all are satisfied, an execution request is issued to the main control unit 4 (). Upon receiving the execution request from the HMI control unit 2, the main control unit 4 searches the line connection information management unit 31 and acquires the line type currently in service, the input destination, and the output destination information (). Next, the main control unit 4 defines the connectable range of the line based on the acquired input destination and output destination information.

Next, the line connection instruction corresponding to the request from the HMI control unit 2 is selected from the line type instruction table 30 (), and the line connection section is controlled. Then, the line connection section is connected according to the line connection instruction and the defined line connection range (). After the connection process is completed, the line currently in service is disconnected (). In the figure, ○ is the connection point of the line currently in service, and ● is the connection point of the line increased by the configuration change.

FIG. 3 is a flow chart showing the operation of the first embodiment of the present invention. When a connection change request is issued from the terminal 1, this request enters the HMI control unit 2. The HMI
The control unit 2 analyzes the request command from the terminal 1 and checks whether all executable conditions are satisfied (S1). When all are not satisfied, the HMI control unit 2 sends an inexecutable message to the terminal 1,
The fact is displayed on the display (S2). When all the executability conditions are satisfied, an execution request is issued to the main control unit 4 (S3). Upon receiving the execution request, the main control unit 4 searches the line connection information management unit 31 and acquires the line type currently in service, the input destination, and the output destination information (S4). Then, the line connectable range is defined (S
5).

Next, referring to the line type instruction table 30, the target line connection instruction is selected (S6). The service line termination unit 20 and the multiplexing / demultiplexing unit 21 execute the connection of the line connection section according to the connection instruction from the main control unit 4 (S7). Then, the connection of the line connection section of the line currently in service is disconnected (S8).

FIG. 4 is a diagram for explaining the operation of the first embodiment. (State 1) is a state in which the line A is connected and the line B is not connected. Here, when a line connection change request is received from the terminal 1, the main control unit 4 connects the unconnected line B as shown in (state 2). When the line B is connected, the line A is disconnected as shown in (state 3). Finally, as shown in (state 4), the line A is not connected and the line B is connected. In this way, the line can be switched in the in-service state.

According to the first embodiment, the main control 4 is the terminal 1
From this, it is possible to give an optimum instruction to the connection of the line in the line connection section, minimize the service line disconnection when changing the configuration, and protect the line connection.

Also, without changing the physical medium, the line connection is changed from the service line A / line speed Nbps to the service line B / line speed Mbps in the in-service state (while continuing the service). be able to.

FIG. 5 is an operation explanatory diagram of the second embodiment of the present invention. 1 are denoted by the same reference numerals. In the figure, 40 is the service line termination unit 2.
0 and a switch function unit composed of a multiplexing / demultiplexing unit 21,
Reference numeral 41 is a physical medium belonging to the service line terminating unit 20 that terminates the service line. Here, the physical medium 4
As 1 is shown three A, B, B '. 15 is a physical medium 4
1 is a service line connected to 1. Thus, by providing two physical media 41 connected to the switch function unit 40, a redundant configuration can be achieved.

Reference numeral 42 is a register for storing line connection information and is provided in the main control section 4. When changing the line connection, it is necessary to update the contents of the register 42, but since the register 42 needs to initialize all the previous information, the line disconnection process is performed. In the figure, the line connection section is between the physical medium 41 and the switch function unit 40. By rewriting the contents of the register 42, the line connection in the line connection section can be changed. The operation of the embodiment configured as described above will be described below.

Of the above-mentioned physical media A and B, A is the active system and B is the standby system. The switch function unit 40 has a function of switching between the active system and the standby system, and is normally in the automatic state. First, in the state shown in the figure, the main control unit 4 sets the connection information in the register 42 and sets the switch function unit 40 to
Connect to the line on the physical medium A side and fix it (). After that, the main control unit 4 rewrites the contents of the register 42 and disconnects the service line on the protection side (). During this time, the operator removes the physical medium B and replaces it with the physical medium B '(). Again, the main control unit 4 rewrites the contents of the register 42 and connects the service line of the line connection section on the protection side. Similarly, the switch function unit 40 is switched to the spare side,
Fix it. After that, the main control unit 4 rewrites the contents of the register 42 and disconnects the service line in the line connection section on the working side. During this time, the operator replaces the physical medium A with another physical medium. Again, the main control unit 4 rewrites the contents of the register 42 and connects the service line in the line connection section on the working side. After the processing is completed, the main control unit 4 releases the switching of the switch and puts it in the automatic state.

FIG. 6 is a flow chart showing the operation of the second embodiment of the present invention. FIG. 7 is a diagram showing sub-flowcharts A and B used in FIG. The sequence of the sub-flowchart A is a sequence for replacing the physical medium on the spare side. First, the switch is fixedly switched to the working side (S10), the line connection in service on the protection side is disconnected (S11), the physical medium on the protection side is changed to another physical medium (S12), and the service on the protection side is changed. Connect the line (S1
3). The sequence of sub-flowchart B is a sequence for replacing the physical medium on the working side. First, the switch is fixedly switched to the spare side (S20), the line connection in service on the working side is disconnected (S21), the physical medium on the working side is changed to another physical medium (S22), and the service on the working side is changed. The line is connected (S23).

Next, the overall operation of FIG. 6 will be described. The main control unit 4 checks whether the switching destination of the switch is the working side (S1). If it is the working side, the switch is fixed to the working side, and the spare physical medium is replaced (S2). After that, the switch is fixed to the spare side and the physical medium on the working side is replaced (S
3). After that, the main control unit 4 releases the switching (S
7). If the switch destination is not the working side in step S1, the main control unit 4 checks whether the switch destination is the spare side (S4). If it is not the backup side, it means that neither the active side nor the backup side is present, so the processing is ended.

If it is on the spare side, the main control unit 4 fixes the switch on the spare side and performs the process of replacing the physical medium on the working side (S5). After that, the switch is fixed to the working side, and the spare side physical medium is replaced (S6). After that, the main control unit 4 cancels the switching (S7).

According to this embodiment, the main control unit 4 can be replaced in order from the physical medium of one system to the register 4
By rewriting the contents of 2 and giving a command to the switch function unit 40, the line connection can be changed in the in-service state.

FIG. 8 is an operation explanatory diagram of the third embodiment of the present invention. The same components as those in FIG. 5 are denoted by the same reference numerals. Also in this embodiment, the system is provided with redundancy by providing a plurality of physical media 41 connected to the switch function unit 40. The physical medium A is the active side and the physical medium B is the standby side. In this embodiment, in addition to the register 42, a conversion unit 43 having a function of changing the contents of the register 42 is provided (the register 42 and the conversion unit 43 are
It is provided in the main control unit 4). Therefore, unlike the embodiment shown in FIG. 5, it is not necessary to initialize the registers, and the trouble of disconnecting the line can be saved. The operation of the embodiment configured as described above will be described below.

First, the main control section 4 sends a command to the conversion section 43 to set the contents of the register 42, and the switch function section 40.
Switch to the line connection on the working side and fix it (). In this state, the physical medium B on the spare side is removed, and the operator replaces it with a new physical medium B ′ of a new version (). Next, the main control unit 4 sends a command to the conversion unit 43,
The contents of the register are changed to switch the switch function unit 40 to the spare side line connection. Then, the operator replaces the physical medium A on the working side with another physical medium. After that, the main control unit 4 sends a command to the conversion unit 43, sets the contents of the register 42, and puts the switch function unit 40 in the normal state.

FIG. 9 is a flow chart showing the operation of the third embodiment of the present invention. First, the main control unit 4 refers to the contents of the register 42 and checks whether the switching destination of the switch is the working side (S1). If it is the working side, the main control unit 4 switches the switch function unit 40 to the working side and fixes it (S2). Then, the physical medium 41 on the spare side is changed to the physical medium 41 of the new version (S3). Next, the main control unit 4 switches and fixes the switch function unit 40 to the spare side (S4), and changes the physical medium 41 on the working side to the physical medium 41 of the new version (S5). When the above process is completed, the main control unit 4 cancels the switching (S
6).

In step S1, if the switch destination is not the working side, the main control section 4 checks whether the switch destination is the spare side (S7). If it is not the backup side, it means that neither the active side nor the backup side is present, so the processing is ended. When the switch is switched to the spare side, the main control unit 4 switches and fixes the switch function unit 40 to the spare side (S8). Then, the physical medium 41 on the working side is changed to the physical medium 41 of the new version (S9).

Next, the main control unit 4 switches and fixes the switch function unit 40 to the working side (S10), and in this state, the operator changes the physical medium 41 on the spare side to the physical medium 4 of the new version.
Change to 1 (S11). When the above process is completed, the main control unit 4 cancels the switching (S6).

According to this embodiment, the conversion unit 43 for changing the contents of the register 42 is provided so that the switching of the switch function unit 40 is controlled by the contents of the register 42, whereby the line disconnection process is performed. Without doing
And the line connection can be changed in the in-service state.

FIG. 10 is an operation explanatory diagram of the fourth embodiment of the present invention. The same components as those in FIG. 5 are denoted by the same reference numerals. In the figure, reference numeral 45 denotes a buffer memory for temporarily saving data, which is provided in the switch function unit 40. Other configurations are the same as those in FIG. This embodiment shows an example of temporarily disconnecting the line and replacing the physical medium. As shown in FIG. 11, each physical medium 41 is composed of a database section 41a and a version data section 41b. The operation of the embodiment configured as described above will be described below.

First, it is assumed that the main control unit 4 fixes the switch of the switch function unit 40 to the working side A and replaces the spare side B with a new version of the physical medium B '. The main control unit 4 saves the data content of the physical medium B in the buffer memory 45. Then, the operator replaces the physical medium B with a new version of the physical medium B ′. At this time, the data of the database section 41a of the new version of the physical medium B'is generated as follows.

When the new physical medium B'is mounted, the main control section 4 refers to the version data section 41b and recognizes that it is a new version (). Next, the data of the database unit 41a of the new physical medium B'and the data of the database unit 41a of the old physical medium B saved in the buffer memory 45 are compared to check whether there is a common data portion. Then, the data area common to both sides (see FIG.
If there is a hatched area), that portion will be taken over as it is (), and for the other non-common portions, the data portion of the database portion 41a of the new physical medium B'will be used as it is as an initial value ( ). That is,
When changing the physical medium from version 1 to version 2 in FIG. 11, the common part is taken over as it is, and the other parts set the data of the new version as initial values. As a result, the database unit 41 of the new physical medium B '
As shown in FIG. 11, the structure of a has a portion 4 commonly used.
1A, an initial value setting section 41B, and a margin section 41C.

FIG. 12 is a flow chart showing the operation of the fourth embodiment of the present invention. When extracting that the physical medium 41 has been changed (S1), the main control unit 4 searches the version data portion 41b of the physical medium 41 and recognizes that the physical medium 41 has been newly changed (S2). Next, the main control unit 4
Checks whether there is common data for version 1 and version 2 (S3). If there is, that part is inherited to the new version (S4), and if not, the data is expanded with the initial value (S5).

According to this embodiment, when the physical medium 41 is changed to the new version, the common data section is inherited as it is, and the other data section uses the initial value of the new version as it is, thereby generating the database section 41a. By doing so, when replacing the physical medium, the data can be taken over in a form closer to the one currently in service operation.

FIG. 13 is an operation explanatory diagram of the fifth embodiment of the present invention. In the figure, 50 is a high-order group signal terminating unit which is a terminating unit of high-speed data, and 51 is a low-order group signal terminating unit which is a terminating unit of low-speed data. The high-order group signal terminating unit 50 and the low-order group signal terminating unit 51 are provided in the service line terminating unit 20 (see FIG. 1). Reference numeral 52 is a time slot unit to which the signals of the high-order group signal terminating unit 50 and the low-order group signal terminating unit 51 are connected. The time slot unit 52 is provided in the multiplexing / demultiplexing unit 21 (see FIG. 1).

Reference numeral 53 is a register for storing signal connection information between the time slot selecting units, which is composed of the high order group signal terminating unit 50 and the time slot unit 52, and 54 is between the high order group signal terminating unit 50 and the low order group signal terminating unit 51. The register 55 stores the signal connection information of, and the reference numeral 55 is a conversion unit that updates the contents of these registers while referring to these registers 53 and 54. The registers 53 and 54 and the conversion unit 55 are provided in the main control unit 4. The operation of the embodiment configured as described above will be described below.

For example, the signal line connected from the high order group signal terminating section # 1 to the low order group signal terminating section # 1 as shown by the solid line in the figure is shown by the broken line in the figure as the low order group signal. Consider a case where the terminal section 51 is changed to # 2. At this time, the conversion unit 55 changes the contents of the register 53 of the time slot unit so that the connection indicated by the broken line is made. The time slot unit 52 switches between the high-order group signal terminating unit 50 and the low-order group signal terminating unit 51 according to the contents of the register 53 as shown by the broken line in the figure. In the above description, the case of changing the connection from the high order group # 1 to the low order group # 2 has been described.
It is also possible to change the connection from 1 to the higher order group # 4.

As described above, according to this embodiment, by providing the conversion unit 55 for changing the contents of the register 53, the line connection is disconnected when the line connection source / destination is changed without changing the physical medium. / Eliminates the need for a reset procedure.

FIG. 14 is an operation explanatory diagram of the sixth embodiment of the present invention. The same components as those in FIG. 13 are denoted by the same reference numerals. In the figure, reference numeral 56 is a protection unit in which information on whether or not line connection / line disconnection is stored. The protection part 56
Are provided in the main control unit 4. The operation of the embodiment configured as described above will be described below.

The main control unit 4, which has received the line connection change command from the terminal 1, refers to the protection unit 56 to check whether the change of the corresponding line connection is prohibited. Young, protection section 5
If the connection change or disconnection of the line is prohibited in 6, the main control unit 4 does not change the connection.
If the contents stored in the protection unit 56 allow the connection change, the main control unit 4 changes the contents of the register 54 to connect the high-order group signal terminating unit 50 and the low-order group signal terminating unit 51. Make changes.

According to this embodiment, the main control unit 4 connects the signal between the high-order group signal terminating unit 50 and the low-order group signal terminating unit 51 according to the line connection / disconnection availability information stored in the protection unit 56. By disconnecting the line,
It is possible to protect from accidentally changing / disconnecting the line connection when providing the service while the line is connected.

FIG. 15 is an operation explanatory diagram of the seventh embodiment of the present invention. The same components as those in FIG. 13 are denoted by the same reference numerals. In the figure, reference numeral 57 is an alarm unit that refers to the contents of the registers 53 and 54 to judge whether the connection is good or bad. The alarm unit 57 is provided in the main control unit 4. Other configurations are the same as those in FIG. The operation of the embodiment configured as described above will be described below.

While the service is being executed, the alarm unit 57 constantly refers to the contents of the registers 53 and 54 to judge whether the connection status of the system is good or bad. If there is no abnormality, the alarm unit 57 does not perform any operation. If an abnormality occurs in the connection state stored in the register 53 and / or the register 54, the alarm unit 57 detects this abnormality. Then, an alarm is output to the HMI control unit 2 (see FIG. 1). The HMI control unit 2 sends the alarm information to the terminal 1
To be displayed on the display. As a result, the operator can know that an abnormality has occurred in the connection and can take measures against the connection abnormality.

According to this embodiment, when the line is connected and the service is provided, the fault information can be notified when an abnormality such as disconnection of the line occurs by mistake.

FIG. 16 is a diagram showing an example of mounting the transmission device of the present invention on a shelf. In this mounting example, the maximum transmission speed is 150 Mbps. In the figure, 200 is a shelf. PW1A is a power feeding unit for feeding power in the shelf, and two PW1A are provided. TCA is a clock supply unit that supplies a clock to the shelf, and two TCAs are provided. The AW 1A is an alarm unit for displaying an alarm in the shelf on an office, a lamp on a rack, a lamp on a surface plate, or the like. SV1A is an interface unit for communicating between the monitoring device outside the shelf and the transmission device, and corresponds to the HMI control 2 in FIG.

The MPIA is an information collecting unit that collects information in the shelf and controls in the shelf. The HSIA is a unit that transmits and receives SONET overhead and controls switching of higher-order groups. M
C1A and LC1A are units for performing interface / multiplexing / demultiplexing, optical / electrical, and electrical / optical conversion of low-order group signals.
And the multiplexer / demultiplexer 21.

The LS1A is a unit for controlling the switching of the low-order group. The EC 1A is a unit for transmitting and receiving overhead bytes for the low-order group. TS1A is SONE
It is a transmission unit that transmits a T signal in each corresponding direction. HC1A has multiple interfaces / multiplex / separation,
It is a unit that performs optical / electrical and electric / optical conversion, and corresponds to the service line terminating unit 20 and the multiplexing / demultiplexing unit 21 in FIG. LC
The SONET signals separated by 1A and HC1A are transmitted from the transmission unit TS1A in each direction.

[0064]

As described above in detail, according to the present invention, the main control can give an optimum instruction to the connection of the line in the line connection section by the instruction from the terminal,
Minimize service line disconnection when changing the configuration,
And the line connection can be protected.

In this case, the HMI controller is
It analyzes the request from the command from the terminal, judges whether all the conditions that can execute the request are satisfied, and if it is executable, makes an execution request to the main control unit, and receives the execution request. Searches the line connection information management section, acquires the line connection information currently in service, and connects the line connection section according to the line connection instruction corresponding to the input and output destination information of the line currently in service. After the line connection process is completed, the line unit connected before the process is disconnected to change the line connection speed unit to, for example, the service line A / line speed Nbp without changing the physical medium.
It is possible to change the line connection from s to the service line B / line speed Mbps in the in-service state (while the service continues).

Further, the switch function unit composed of the service line termination unit and the multiplexing / demultiplexing unit and the physical medium having a plurality of information transmission rates belonging to the service line termination unit are in a redundant state with the switch function unit. In the connected configuration, the main control unit can change the line connection in an in-service state in which a command is given to the switch function unit so that the physical medium of one system can be replaced in order. Further, a switch function unit including the service line termination unit and a multiplexing / demultiplexing unit, and a physical medium having a plurality of information transmission rates belonging to the service line termination unit are connected to the switch function unit in a redundant state. In the configuration, a conversion unit having a function of changing the content of a register that stores line connection information is provided in the main control unit, and the main control unit controls the switch function unit by giving a command to the conversion unit. By switching the line,
The line connection can be changed in the in-service state without disconnecting the line.

Further, the switch function unit is provided with a buffer memory for temporarily saving data, and the physical medium is provided with a data storage unit and a version storage unit for storing the version of the stored data. The main control unit, when switching from a certain version of the physical medium to a new version of the physical medium, saves the data of the original physical medium in the buffer memory, and then the data unit of the newly connected physical medium. Of the data stored in the buffer memory, the data part that can be commonly used by both is set as the data of the new physical medium, and the data that cannot be used by both is the initial version of the new version. By setting the value data, when replacing the physical medium, the It is possible to take over the data.

The service line terminating unit has a line connecting unit consisting of a high-order group signal terminating unit and a low-order group signal terminating unit, and when switching the connection between the high-order group signal terminating unit and the low-order group signal terminating unit. The multiplexing / demultiplexing unit is provided with a time slot unit that mediates between the high-order group signal terminating unit and the low-order group signal terminating unit, and a register that controls connection of the time slot unit, and the main control unit has the contents of the register. Is provided for controlling the write control of the high-order group signal terminating unit and the low-order group signal terminating unit by rewriting the contents of the register in response to a connection switching request. I switched the connection of.

This eliminates the need for disconnecting / resetting the line connection when changing the line connection source / destination without changing the physical medium. Further, the line connection unit is configured such that switching is performed by a register, and a protection unit for storing information on availability of line connection / line disconnection is provided in the main control unit, and the main control unit stores in the protection unit. By updating the register of the line connection unit with the information provided, when providing the service in the line connected state,
It is possible to protect against accidentally changing / disconnecting the line connection.

Further, by providing an alarm unit in the main control unit for referring to the information in the register of the line connection unit to judge whether the connection is good or not, when the line is connected and the service is provided, When an abnormality occurs such as when the line connection is disconnected, the failure information can be notified.

[Brief description of drawings]

FIG. 1 is a principle block diagram of the present invention.

FIG. 2 is an operation explanatory diagram of the first embodiment example of the present invention.

FIG. 3 is a flowchart illustrating an operation of the first exemplary embodiment of the present invention.

FIG. 4 is another operation explanatory diagram of the first embodiment example of the present invention.

FIG. 5 is an operation explanatory diagram of the second embodiment example of the present invention.

FIG. 6 is a flowchart illustrating an operation of the second exemplary embodiment of the present invention.

FIG. 7 is a diagram showing sub-flowcharts A and B.

FIG. 8 is an operation explanatory diagram of the third embodiment example of the present invention.

FIG. 9 is a flowchart showing an operation of the third exemplary embodiment of the present invention.

FIG. 10 is an operation explanatory diagram of the fourth embodiment of the present invention.

FIG. 11 is an operation explanatory diagram of the fourth embodiment of the present invention.

FIG. 12 is a flowchart showing an operation of the fourth exemplary embodiment of the present invention.

FIG. 13 is an operation explanatory diagram of the fifth embodiment of the present invention.

FIG. 14 is an operation explanatory diagram of the sixth embodiment of the present invention.

FIG. 15 is an operation explanatory diagram of the seventh embodiment of the present invention.

FIG. 16 is a diagram showing an example of mounting the transmission device of the present invention on a shelf.

FIG. 17 is a block diagram showing a configuration example of a conventional system.

FIG. 18 is a diagram showing a system configuration example of a SONET network.

FIG. 19 is a diagram showing another system configuration example of a SONET network.

[Explanation of symbols]

 1 Terminal 2 HMI Control Unit 4 Main Control Unit 15 Service Line 20 Service Line Termination Unit 21 Multiplexing / Demultiplexing Unit 30 Line Type Instruction Table 31 Line Connection Information Management Unit 100 Terminal Equipment

Claims (8)

[Claims] 1. An HMI control unit that analyzes a request command from a terminal and issues an execution request to a main control unit, a line type instruction table including a plurality of line connection instruction functions, and line connection information currently in service. A main control unit that has a built-in line connection information management unit that stores the request, controls the execution of requests from the HMI control unit, a service line termination unit that terminates a service line, and multiplex / separate that multiplexes / separates signals. And a line connection changing system for a SONET transmission device. 2. The HMI control unit analyzes a request by a command from a terminal, determines whether or not all conditions for executing the request are satisfied, and if the condition is executable, an execution request is sent to the main control unit. In response to the execution request, the main control unit searches the line connection information management unit, obtains the line connection information currently in service, and correlates with the input and output destination information of the line currently in service. The line of the SONET transmission device according to claim 1, wherein the line connection section is connected in accordance with a connection instruction, and after the line connection process is completed, the line connected before the process is disconnected. Connection change system. 3. A switch function unit comprising the service line termination unit and a multiplexing / demultiplexing unit, and a physical medium having a plurality of information transmission rates belonging to the service line termination unit in a redundant state with the switch function unit. 2. The line connection change system for a SONET transmission device according to claim 1, wherein, in the connected configuration, the main control unit gives a command to the switch function unit so that the physical medium of one system is replaced in order. . 4. A switch function unit comprising the service line termination unit and a multiplexing / demultiplexing unit, and a physical medium having a plurality of information transmission rates belonging to the service line termination unit in a redundant state with the switch function unit. In the connected configuration, a conversion unit having a function of changing the content of the register that stores the line connection information is provided in the main control unit, and the main control unit gives a command to the conversion unit,
2. The line connection change system for a SONET transmission device according to claim 1, wherein the switch function unit is controlled to switch the line without disconnecting the line. 5. The switch function section is provided with a buffer memory for temporarily saving data, and the physical medium is provided with a data storage section and a version storage section for storing a version of the stored data. The main control unit, when switching from a physical medium of a certain version to a physical medium of a new version, saves the data of the original physical medium in the buffer memory, and then the data unit of the newly connected physical medium. Of the data stored in the buffer memory, the data part that can be commonly used by both is set as the data of the new physical medium, and the data that cannot be used by both is the initial version of the new version. 5. The SO according to claim 3, wherein the value data is set.
Line connection change system for NET transmission equipment. 6. The service line terminating unit includes a line connecting unit composed of a high-order group signal terminating unit and a low-order group signal terminating unit, and when switching the connection between the high-order group signal terminating unit and the low-order group signal terminating unit. The multiplexing / demultiplexing unit is provided with a time slot unit that mediates between a high-order group signal terminating unit and a low-order group signal terminating unit, and a register that controls connection of the time slot unit, and the main control unit includes the contents of the register. Is provided for controlling the write control of the high-order group signal terminating unit and the low-order group signal terminating unit by rewriting the contents of the register in response to a connection switching request. The line connection change system for a SONET transmission device according to claim 1, wherein the connection is switched. 7. The line connection unit is configured such that switching is performed by a register, a protection unit for storing line connection / line disconnectability information is stored in the main control unit, and the main control unit is controlled by 7. The line connection change system for a SONET transmission device according to claim 6, wherein whether or not to update the register of the line connection unit is determined based on the information stored in the protection unit. 8. The line connection change of the SONET transmission device according to claim 6, wherein an alarm unit is provided in the main control unit to refer to information in a register of the line connection unit to judge whether the connection is good or bad. system.