JPH0522244A - Inter-frame communication system - Google Patents

Abstract

PURPOSE:To realize the inter-frame communication system configured with a small scale hardware with respect to the inter-frame communication system making communication between plural frames accommodating a transmitter. CONSTITUTION:A basic frame 70 and a subordinate frame 80 are provided respectively with 1st and 2nd communication means 71, 81 used in common for in-frame communication and inter-frame communication, 1st and 2nd connection control means 72, 82 controlling the connection state of the communication means, and 1st and 2nd inter-frame communication request. notice means 73, 83 notifying an inter-frame communication request and when an inter-frame communication request takes place, the 1st and 2nd connection control means connect the 1st and 2nd communication means to an inter-frame communication line 91.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-frame communication system for communicating between a plurality of frames accommodating a transmission device.

In recent years, in transmission devices used in various communication networks such as a telephone network, a device having a plurality of transmission systems has been developed with one transmission device due to diversification of communication modes.

In such a transmission device, a method for efficiently controlling a plurality of transmission systems is desired.

[0004]

2. Description of the Related Art Conventionally, a system has been adopted in which the control systems of the respective transmission systems are combined into one and the control system centrally controls a plurality of transmission systems. Hereinafter, this control method is referred to as a centralized control method.

According to this centralized control system, it is possible to efficiently control a plurality of transmission systems with a small-scale hardware.

FIG. 6 is a block diagram showing the overall configuration of such a centralized control type transmission apparatus. Note that FIG.
As a transmission device, for example, a digital signal multiplexing / demultiplexing transmission device used in a telephone network or the like is shown as a representative.

In the figure, 10 (1) to 10 (n) are
A multiplexing / demultiplexing transmission unit that multiplexes and demultiplexes the main signal (low-speed digital signal and high-speed digital signal). However, n
Is an integer of 2 or more.

Reference numeral 20 denotes the demultiplexing / demultiplexing transmission unit 10.
A monitoring / control unit that monitors and controls (1) to 10 (n).

These multiplexing / demultiplexing transmission units 10 (1) -1
0 (n) and the monitor / control unit 20 are housed in one rack 30, and the external monitor / control unit 4 provided outside the rack 30.
Centrally controlled by 0.

Each multiplexing / demultiplexing transmission unit 10 (x) has a low-speed interface unit (low-speed IF unit) 11 for m channels.
(X1) to 11 (xm) and the demultiplexing / demultiplexing unit 12 (x)
And a high-speed interface unit (high-speed IF unit) 13 (x). However, x = 1, 2, ..., N. Further, m is an integer of 2 or more.

Here, the low-speed interface unit 11 (x
1) to 11 (xm) perform optical / electrical conversion and electric / optical conversion of the low-speed digital signal. The demultiplexing / demultiplexing unit 12 (x) is
Multiplexing low-speed digital signals and separating high-speed digital signals. The high speed interface unit 13 (x) performs optical / electrical conversion and electric / optical conversion of the high speed digital signal.

The monitoring / control unit 20 includes a terminal control unit 21 and
The memory management unit 22 and the alarm issuing unit 23 are included.

Here, the terminal control unit 21 sets the operating state in the rack 30 and switches the line under the control of the external monitoring / control unit 40. The memory management unit 22 manages the operating state in the rack when the system is constructed or when an emergency is started. The alarm issuing unit 23 monitors the occurrence status of a failure in the rack 30, and when the failure occurs, supplies an alarm to the external monitoring / controlling unit 40.

In the above configuration, first, the signal multiplexing operation and signal demultiplexing operation in each multiplexing / demultiplexing transmission unit 10 (x) will be described.

In the multiplex mode, first, low-speed digital signals (optical signals) for m channels sent via the low-speed lines 51 (x1) to 51 (xm) for reception correspond to the low-speed interface units. 11 (x1) to 11
It is converted into an electric signal by (xm).

Next, the converted output is multiplexed / demultiplexed by the demultiplexing unit 12.
After being converted into a high-speed digital signal by (x), it is multiplexed.

Finally, the multiplexed output is converted into an optical signal by the high speed interface section 13 (x) and then sent out via the high speed transmission line 53 (x).

On the other hand, in the separation mode, first, the high speed digital signal sent through the high speed receiving line 54 (x) is transferred to the high speed interface unit 13 (x).
Is converted into an electric signal.

Next, this converted output is multiplexed / demultiplexed 12
The signal of each channel is separated by (x) and then converted into a low-speed digital signal.

Finally, after each converted output is converted into an optical signal by the corresponding low speed interface section 11 (x), it is sent out via the low speed transmission lines 52 (x1) to 52 (xm).

Each multiplexing / demultiplexing transmission unit 10 (x)
Can be operated independently. A backup line is set for each of the high-speed lines 53 (x) and 54 (x), and line switching is possible when a line in use fails.

Next, with reference to FIG. 7, the monitoring and control operation of each multiplexing / demultiplexing transmission unit 10 (x) by the external monitoring / control unit 40 will be described.

FIG. 7 is a block diagram showing the structure of an on-board communication system for performing the above-mentioned monitoring and control. In addition,
In the figure, for example, a communication configuration for monitoring and controlling the low speed interface unit 11 (xy) is shown as a representative.

This monitoring and control is performed via the terminal control unit 21. The terminal control unit 21 includes a central processing unit (hereinafter,
It is configured by a “CPU” 211, a communication unit 212, and a selector 213.

Here, the CPU 211 performs various processes for executing intra-frame communication. The communication unit 212 is, for example,
It is composed of a large-scale integrated circuit (hereinafter referred to as “LSI”), and transmits and receives information under the control of the CPU 211. Under the control of the CPU 211, the selector 213 connects the communication unit 212 to the low speed interface unit 11 (x1).
To 11 (xm) selectively.

Each low speed interface unit 11 (xy) is
It is composed of a CPU 111 (xy) and a communication unit 112 (xy). However, y = 1, 2, ..., M.

Here, the CPU 111 (xy) performs various communication processes for intra-frame communication. Communication unit 112 (xy)
Transmits and receives information under the control of the CPU 111 (xy).

In the above configuration, first, the operation of transmitting information from the external monitor / control unit 40 to the low speed interface unit 11 (xy) will be described.

In this operation mode, first, the CPU 211 of the terminal control unit 21 causes the external monitoring / control unit 40 to operate.
The destination of the control information supplied from is analyzed.

Next, the connection state of the selector 213 is controlled based on the analysis result. As a result, the communication unit 2
12 is a low-speed interface unit 11 (x
y) is connected.

Finally, control information is supplied from the CPU 211 to the communication section 212. As a result, the control information is supplied from the communication unit 212 to the corresponding low speed interface unit 11 (xy) via the selector 213.

This control information is sent to the low speed interface unit 1.
1 (xy) communication unit 112 (xy) to CPU 111
Is supplied to (xy).

Next, the low speed interface section 11 (xy)
The operation of transmitting information from the external monitoring / control unit 40 to the external monitoring / control unit 40 will be described. The information referred to here is, for example, the information extracted from the main signal by the low-speed interface unit 11 (xy).

In this operation mode, first, the interrupt signal INTL is sent from the CPU 111 (xy) of the low speed interface unit 11 (xy) to the CPU 211 of the terminal control unit 21.
Is supplied. As a result, the connection state of the selector 213 is controlled by the CPU 211, and the communication unit 212 is connected to the low speed interface unit 11 (xy).

After that, information is supplied from the CPU 111 (xy) to the communication unit 112 (xy). As a result, information is supplied from the communication unit 112 (xy) to the CPU 211 via the selector 213 and the communication unit 212. This information is
It is supplied from the CPU 211 to the external monitoring / control unit 40.

The above is the configuration of the on-board communication system in the digital signal multiplexing / demultiplexing transmission device.

As described above, the conventional digital signal multiplexing / demultiplexing transmission device is the multiplexing / demultiplexing transmission unit 10 (1) .about.
10 (n) and the monitor / control unit 20 are housed in one rack 30, and the external monitor / control unit 40 centrally controls the multiplex / demultiplex transmission units 10 (1) to 10 (n). ing.

However, there is a regulation on the size of one rack. Therefore, if the size of each multiplex / demultiplex transmission unit 10 (x) is increased due to an increase in the number of multiplex channels or the like, one rack cannot accommodate one digital signal multiplex transmission device.

In order to solve this problem, a method in which one digital signal multiplexing / demultiplexing device is distributed and stored by a plurality of racks can be considered. Hereinafter, this storage method is referred to as a distributed storage method.

FIG. 8 is a block diagram showing the configuration of such a distributed storage type digital signal multiplexing / demultiplexing transmission apparatus.

The apparatus shown in the figure has each multiplexing / demultiplexing transmission unit 10
A rack 30 (x) is provided for each (x), and one rack 30 is provided.
One multiplexing / demultiplexing transmission unit 10 (x) is housed in (x).

With such a configuration, it is possible to cope with an increase in size of each multiplexing / demultiplexing transmission unit 10 (x).

However, if such a distributed storage system is adopted, how to centrally control the multiplex / demultiplex transmission unit 10 (x) distributed on each rack 30 (x) by one external monitoring / controlling unit 40. Becomes a problem.

As a method for solving this problem, only one rack is connected to the external monitor / control unit 40 (hereinafter, such a rack is referred to as "basic rack"), and the remaining racks (hereinafter, this rack) are connected through this basic rack. Such a rack is referred to as a "dependent rack"). Hereinafter, this centralized control method is referred to as a basic dependent control method.

FIG. 8 shows each multiplexing / demultiplexing transmission unit 10.
This basic dependent control method is shown as the control method of (x).

In FIG. 8, the rack 30 (1) is the basic rack and the racks 30 (2) to 30 (n) are the dependent racks.

Each rack 30 (x) is provided with a monitor / control unit 20 (x). The monitor / control unit 20 (1) of the basic rack 30 (1) is connected to the external monitor / control unit 40. The monitoring / control units 20 (2) to 20 (n) of the subordinate racks 30 (2) to 30 (n) are the basic racks 30 (1).
It is star-connected to the monitoring / control unit 20 (1).

With such a configuration, each rack 30 (x) can be centrally controlled by one external monitor / control unit 40 with a very simple wiring structure.

However, when this basic dependent control system is adopted, in addition to the intra-frame communication system, inter-frame communication for communicating between the basic frame 30 (1) and the dependent frames 30 (2) to (n). A system is needed.

As a method of constructing this inter-frame communication system, a method of constructing a communication system dedicated to inter-frame communication is generally considered.

However, with such a configuration, in the terminal control section 21 (x), the hardware for communication increases, which may hinder the design of the hardware for actual monitoring and control.

Therefore, when constructing a communication system between racks, it is necessary to make the hardware for communication as small as possible.

[0053]

As described above, when the centralized control system is adopted in the transmission system of the distributed storage system, it is possible to adopt the basic slave control system. , It is important how to build the communication system between racks with small-scale hardware.

Therefore, an object of the present invention is to provide an overhead communication system which can be configured with a small-scale hardware.

[0055]

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

In the figure, 70 is a basic rack and 80 is a dependent rack. The basic rack 70 is connected to an external monitoring / control unit 90, and is monitored and controlled by the external monitoring / control unit 90. The subordinate rack 80 is connected to the basic rack 70, and is monitored and controlled by an external monitoring / control unit 90 through the basic rack 70.

On the basic rack 70, the first communication means 71,
A first connection control means 72 and a first inter-cabinet communication request notifying means 73 are provided.

Here, the first communication means 71 is the basic rack 7
It is a communication means that is used for both communication within 0 and communication between the subordinate rack 80.

The first connection control means 72 connects the first communication means 71 to the on-board communication path 74 when an intra-communications request is made, and connects to the inter-communication path 91 when an inter-communications communication request is made. It is a means of connecting.

The first inter-frame communication request notifying means 73 is means for notifying the sub-frame 80 of the inter-frame communication request when the inter-frame communication request is generated.

Similarly, the subordinate rack 80 is also provided with a second communication unit 81, a second connection control unit 82, and a second interframe communication request notifying unit 83. These means 81, 8
Since the functions of Nos. 2 and 83 are almost the same as those provided on the basic rack 70, detailed description will be omitted.

Incidentally, in FIG. 1, as a subordinate rack, for convenience,
Although only one subordinate rack 80 is shown, it goes without saying that there may be a plurality of subordinate racks. In this case, each subordinate rack 80
Are star-connected to the base rack 70.

[0063]

In the above structure, first, the external monitoring / control unit 9
An inter-frame communication operation when the control information is supplied from 0 to the dependent frame 80 will be described.

In this case, the first connection control means 72 connects the first communication means 71 to the overhead communication path 91.

The first rack communication request notifying means 73 notifies the dependent rack 80 of the rack communication request. As a result, the second communication means 81 is controlled by the second connection control means 82.
Is connected to the communication path 91.

As a result, the control information supplied from the external monitoring / control unit 90 to the basic rack 70 is supplied from the first communication means 71 to the second communication means 81.

When the second communication means 81 receives the control information, the second connection control means 82 connects the second communication means 81 to the on-board communication path 84. As a result, the control information is used to control the subordinate rack 80.

Next, from the subordinate rack 80 to the external monitoring / control unit 9
An inter-frame communication operation when information is supplied to 0 will be described.

In this case, the second communication means 81 is connected to the overhead communication path 91 by the second connection control means 82.

Further, the second rack communication request notifying means 83 supplies the rack communication request to the basic rack 70. As a result, the first communication means 71 is connected to the overhead communication path 91 by the first connection control means 72.

As a result, the information detected by the subordinate rack 80 is supplied to the external monitor / control unit 90 via the second communication means 81 and the first communication means 71.

According to the above configuration, since the functions of the first and second connection control means 72 and 82 can be realized by almost software, it is necessary to add some hardware to the on-board communication system. This makes it possible to construct an inter-frame communication system.

[0073]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 2 is a block diagram showing the configuration of the first embodiment of the present invention.

In the figure, 100 (1) is a basic rack, and 100 (2) to 100 (n) are subordinate racks. The basic rack 100 (1) is connected to the external monitoring / control unit 200, and is monitored and controlled by the external monitoring / control unit 200.

The dependent racks 100 (2) to 100 (n) are star-connected to the basic rack 100 (1).
Through (1), the external monitoring / control unit 200 monitors and controls.

In the basic rack 100 (1), 110
(1) is a terminal control unit (hereinafter, referred to as "basic control unit") in the above-mentioned monitoring / control unit. 120 (1
1) to 120 (1 m) are low-speed interface units.

In the basic control section 110 (1), 111
(1) is a CPU that executes various processes for intra-frame communication and inter-frame communication. Details of the processing contents of the CPU 111 (1) will be described later.

Reference numeral 112 (1) is a communication unit that is used for both intra-frame communication and inter-frame communication. The communication unit 112 (1) is composed of, for example, an LSI and has two input / output channels C.
It has HA and CHB.

Here, the input / output channel CHA is used for intra-frame communication, and the input / output channel CHB is used for inter-frame communication.

The communication unit 11 (1) selectively selects the low speed interface units 120 (11) to 120 (1 m).
A selector for connecting to the 2 (1) input / output channel CHA.

Reference numeral 114 (1) is a selector for selectively connecting each subordinate rack 100 (x) to the input / output channel CHB of the communication section 112. However, x = 2, 3, ..., N.

In each low speed interface unit 120 (1y), 121 (1y) is a CPU for executing various processes for intra-frame communication. Details of the processing contents of the CPU 121 (1y) will be described later. Note that y = 1, 2, ..., M.

Reference numeral 122 (1y) is a communication section used for intra-frame communication, and is composed of, for example, an LSI.
Each of the communication units 122 (1y) is connected to the selector 113 via a control line (in-car communication line) 130 (1y) for the inside of the rack.
It is connected to (1).

Each subordinate rack 100 (x) is also a basic rack 100
Similar to (1), it has terminal control units (hereinafter referred to as “dependent control units”) 110 (2) to 110 (n) and low-speed interface units 120 (21) to 120 (2m).

The subordinate control unit 110 (x) also has a CPU 111 (x) for communication processing and a communication unit for intra- and inter-frame communication, similarly to the basic control unit 110 (1) of the basic rack 100 (1). The communication unit 112 (x) and the selector 113 for intra-frame communication
Have (x).

However, the subordinate control unit 110 (x) includes
There is no selector for inter-frame communication. That is, the input / output channel CHB of the communication unit 112 (x) is directly connected to the basic rack 10 via the rack control line (bridge communication path) 310 (x).
0 (1) selector 114 (1).

The low speed interface section 120 (xy) also
Low-speed interface section 120 (1 of basic rack 100 (1)
Similarly to y), the CPU 121 (xy) for communication processing,
The communication unit 122 (xy) for in-frame communication is included. And
Each communication unit 122 (xy) is connected to the selector 113 (x) by a control line (intra-communication channel) 130 (xy) for intra-communications.

CPU 111 (1) of the basic rack 100 (1)
And the CPU 111 (x) of each subordinate rack 100 (x) respectively control lines 320 (xM) and 320 (x) for interrupt notification.
They are connected to each other via S).

The above is the configuration of the first embodiment of the overhead communication system. Next, the CPU of the basic control unit 110 (1)
111 (1) processing and C of each subordinate control unit 110 (x)
The processing of PU111 (x) will be described.

FIG. 3 is a flowchart showing the processing of the CPU 111 (1).

In this process, first, it is determined whether or not the control information is sent from the external monitoring / control unit 200 (step S1). When the control information is sent, the destination of this control information is analyzed (step S2).

When the destination is the basic rack 100 (1), the input / output channel CHA is selected as the input / output channel of the communication unit 112 (1) (step S3).

When this selection is completed, the connection state of the selector 113 (1) is controlled so as to select the low speed interface section 120 (1y) to be controlled (step S).
4). Thereafter, the control information is supplied to the communication unit 112 (1) (step S5).

When it is determined in step S2 that the destination is the subordinate rack 100 (x), CHB is selected as the input / output channel of the communication unit 112 (1) (step S).
6).

When this selection is completed, the selector 114 (1) is selected so that the subordinate rack 100 (x) to be controlled is selected.
The connection state of is controlled (step S7).

When this control is completed, the interrupt signal INT (xM) is supplied to the CPU 112 (x) of the subordinate rack 100 (x) (step S8). After this, the process moves to step S5, and the control information is transmitted.

When it is determined in step S1 that the control information has not been sent, the low speed interface unit 1
Interrupt signal I from CPU 121 (1y) of 20 (1y)
It is determined whether NTL has been sent (step S
9).

When the interrupt signal INTL is sent, CHA is selected as the input / output channel of the communication section 112 (1) (step S10). When this selection is completed, the low-speed interface unit 120 that has sent the interrupt signal INTL
The connection state of the selector 113 (1) is controlled so as to select (1y) (step S11).

After that, it is determined whether or not the information is sent from the CPU 121 (1y) (step S12).
When information is sent, this information is sent to the external monitoring / control unit 2
00 (step S13).

In step S9, the interrupt signal I
If it is determined that the NTL will not be sent, the dependent rack 100
The interrupt signal INT (x
S) is sent (step S1)
4).

When the interrupt signal INT (xS) is sent, CHB is used as the input / output channel of the communication section 112 (1).
Is selected (step S15). After making this selection,
The connection state of the selector 114 (1) is controlled so as to select the subordinate rack 100 (x) that has sent the interrupt signal (step S16).

After that, it is judged whether or not the information is sent from the subordinate rack 100 (x) (step S17). When the information is sent, this information is sent to the external monitoring / control unit 20.
0 (step S18).

FIG. 4 is a flow chart showing the processing of the CPU 111 (n).

In this process, first, the basic rack 100
The interrupt signal INT (x
It is determined whether M) has been sent (step S2).
1). When the interrupt signal INT (xM) is sent, CHB is selected as the input / output channel of the communication unit 112 (x) (step S22).

When this selection is completed, it is determined whether or not the control information has been sent from the basic rack 100 (1) (step S23). When the control information is sent, the communication unit 112
CHA is selected as the input / output channel of (x) (step S24).

When this selection is completed, the connection state of the selector 113 (n) is controlled so as to select the low speed interface section 120 (xy) to be controlled (step S).
25). When this control is completed, the control information is transmitted to the communication unit 112.
(N) is supplied (step S26).

In step S21, the interrupt signal INT
If it is determined that (xM) has not been sent, it is determined whether the interrupt signal INTL has been sent from the CPU 121 (xy) of the low speed interface unit 120 (xy) (step S27).

When the interrupt signal INTL is sent, CHA is selected as the input / output channel of the communication section 112 (n) (step S28). When this selection is completed, the low-speed interface unit 120 that has sent the interrupt signal INTL
The connection state of the selector 113 (n) is controlled so as to select (xy) (step S29).

After that, the low speed interface section 120 (x
It is determined whether or not the information is sent from y) (step S30). When the information is sent, the communication unit 112
CHB is selected as the input / output channel (n) (step S31).

When this selection is completed, the interrupt signal INT (xS) is supplied to the CPU 111 (1) of the basic rack 100 (1) (step S32). After this, the communication unit 112
Information is supplied to (x) (step S33).

In step S27, the interrupt signal INTL
If it is determined that the received signal has not been sent, the process returns to step S21, and the received signal is monitored again.

The above is the CPUs 111 (1) and 111 (x).
Is the processing content. Next, an inter-frame communication operation with the above configuration will be described.

First, the inter-frame communication operation when the external monitor / control unit 200 sends control information to the subordinate frame 100 (x) will be described.

In this case, first, the external monitoring / control unit 20
Control information is supplied from 0 to the CPU 111 (1). Next, the destination of this control information is determined by the CPU 111 (1) (step S2 in FIG. 3).

Thereafter, based on this determination result, CHB is selected as the input / output channel of the communication section 112 (1) (step S6 in FIG. 3). After this selection is completed, the connection state of the selector 114 (1) is controlled so that the subordinate rack 100 (x) to be controlled is selected (step S7 in FIG. 3).

Thereafter, the CPU 111 (1) to the CPU 1
The interrupt signal INT (xM) is supplied to 11 (x) (step S8 in FIG. 3). As a result, the subordinate control unit 11
In the communication unit 112 (x) of 0 (x), CHB is selected as the input / output channel (step S2 in FIG. 4).
2).

From the above, the communication units 112 (1), 112
(X) is connected via the control line 310 (x).

Thereafter, the CPU 111 (1) to the communication unit 1
Control information is supplied to 12 (1) (step S in FIG. 3).
5). As a result, the communication line 112 (1) to the control line 32
Control information is supplied to the communication unit 112 (x) via 0 (x).

This control information is further included in the communication section 112.
It is supplied from (x) to the CPU 111 (x). As a result, CHA is set as the input / output channel of the communication unit 112 (x).
Is selected (step S24 in FIG. 4). Further, in the selector 113 (x), the connection state is controlled so as to select the low-speed interface unit 120 (xy) to be controlled (step S25 in FIG. 4).

Thereafter, the CPU 111 (x) to the communication unit 1
Control information is supplied to 12 (x) (step S26 in FIG. 4). As a result, this control information is transmitted to the communication unit 1.
12 (x) is supplied to the CPU 121 (xy) of the low speed interface unit 120 (xy) via the control line 130 (xy).

Next, from the subordinate rack 100 (x), external monitoring /
An inter-frame communication operation when information is supplied to the control unit 200 will be described.

In this case, first, C of the subordinate rack 100 (x)
The interrupt signal INTL is supplied from the PU 121 (xy) to the CPU 111 (x). As a result, the communication unit 112
In (x), CHA is selected as the input / output channel (step S28 in FIG. 4).

Further, in the selector 113 (x),
The connection state is controlled so as to select the low-speed interface unit 120 (xy) that has detected the information (step S29 in FIG. 4).

Thereafter, the CPU 1 is connected from the communication unit 122 (xy) to the control line 130 (xy) and the communication unit 112 (x).
Information is supplied to 11 (x). As a result, the communication unit 1
In 12 (x), CHB is selected as the input / output channel (step S31 in FIG. 4).

Further, the CPU 111 (x) to the CPU 11
The interrupt signal INT (xS) is supplied to 1 (1) (see step S32 in FIG. 4). As a result, the basic rack 100
In the communication unit 112 (1) of (1), CHB is selected as the input / output channel (step S1 of FIG. 3).
5).

Further, in the selector 114 (1),
To select the dependent rack 100 (x) that detected the information,
The connection state is controlled (step S16 in FIG. 3).

After that, the CPU 11 of the subordinate rack 100 (x)
Information is supplied from 1 (x) to the communication unit 112 (x) (step S33 in FIG. 4). This information is
It is supplied from the communication unit 112 (x) to the CPU 111 (x) via the control line 310 (xy) and the communication unit 112 (1).

Thereafter, this information is stored in the CPU 111 (x).
Is supplied to the external monitoring / control unit 200 (step S18 in FIG. 3).

As described in detail above, according to this embodiment,
The inter- rack communication system can be constructed by adding some hardware to the existing intra- rack communication system.

This has two input / output channels CHA and C.
Communication units 112 (1) and 112 (x) having HB are provided, and two input / output channels CH are used by using an interrupt function or the like.
This is because the intra-frame communication and the inter-frame communication are switched by selectively selecting A and CHB.

In particular, when the number of the subordinate racks 100 (x) is one, the selector 114 (1) is not necessary, so that the hardware is the same as that of the control line 31 in the existing intraframe communication system.
The in-line communication system can be constructed only by adding 0 (2), 320 (2M), 320 (2S).

In addition, an intra- rack communication request or an inter- rack communication request is generated (control information, interrupt signals INTL, INT (xM), I
Based on the reception of NT (xS)), the communication unit 112
(1), 112 (x) input / output channels CHA, CHB
It is possible to switch between intra-communication and inter-communication by simply selecting and controlling.

FIG. 5 is a block diagram showing the configuration of the second embodiment of the present invention. In addition, in FIG.
The same parts as those in are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the previous embodiment, two input / output channels C
Communication unit 112 (1), 112 having HA and CHB
(X) is provided, and these communication units 112 (1), 112
By switching and selecting the input / output channel of (x),
The case of switching between intra-frame communication and inter-frame communication has been described.

On the other hand, in this embodiment, a communication section having one input / output channel is provided as a communication section, and the input / output channel of this communication section is connected to a selector for both intra-frame communication and inter-frame communication. , By the switching control of this selector,
It is designed to switch between intra-frame communication and inter-frame communication.

In FIG. 5, 116 (1), 116
(X) is a communication unit having one input / output channel.
Reference numeral 117 (1) is a selector used for both intra-frame communication and inter-frame communication.

The communication units 116 (1) and 116 (x)
As, use one with multiple input / output channels,
One of the input / output channels may be used.

According to such a configuration, similarly to the previous embodiment, the inter-frame communication system can be realized by a small-scale hardware, and the intra-frame communication and the inter-frame communication can be switched and each dependent frame can be realized. Since any of the switching of 100 (x) can be realized by the switching control of the selector 117 (1), there is an advantage that the control becomes simpler.

Although the two embodiments of the present invention have been described in detail above, the present invention is not limited to such embodiments, and various modifications can be made without departing from the scope of the invention. Of course it is possible.

[0140]

As described above in detail, according to the present invention,
It is possible to provide an inter-frame communication system that can be constructed with small-scale hardware.

[Brief description of drawings]

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

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

FIG. 3 is a flowchart showing a process of a CPU 111 (1) shown in FIG.

FIG. 4 is a flowchart showing a process of a CPU 111 (x) shown in FIG.

FIG. 5 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a centralized control type digital signal multiplexing / demultiplexing transmission device.

7 is a block diagram showing a configuration of the on-board communication system of FIG.

FIG. 8 is a block diagram showing a configuration of a basic dependent control system. It

[Explanation of symbols]

70 basic rack 80 subordinate rack 71 first communication means 72 first connection control means 73 first inter-frame communication request notification means 74, 84 in-frame communication path 81 second communication means 82 second connection control means 83 Second inter-cabinet communication request notifying means 90 External monitoring / control unit 91 Inter-cabinet communication path

Claims (3)

[Claims] 1. The basic rack (70) and the dependent rack (80) for monitoring and controlling the dependent rack (80) connected to the basic rack (70) through the basic rack (70). In a communication system between racks for communicating between the first rack and the first rack which is provided on the basic rack (70) and is used for communication between the basic rack (70) and the dependent rack (80). Communication means (71), provided on the basic rack (70), when an intra-frame communication request occurs,
The first communication means (71) is connected to the intra-cabinet communication path (74), and is connected to the inter-cabinet communication path (91) when an inter-cabinet communication request is made
Connection control means (72) of the, and provided in the basic rack (70), when a communication request between racks occurs,
First inter-communication communication request notifying means (73) for notifying the dependent rack (80) of this inter-branch communication request, and communication within the dependent rack (80) provided in the dependent rack (80) A second communication means (81) that is also used for communication with the basic rack (70) and the subordinate rack (80), and when an intra- rack communication request occurs,
The second communication means (81) is connected to the intra-communication path (84), and when an inter-communication communication request is made, the second communication means (81) is connected to the inter-communication path (91). The second connection control means (82) is provided on the subordinate rack (80), and when an inter- rack communication request occurs,
An inter-communication system, characterized by comprising: a second inter-communication request notifying means (83) for notifying the basic rack (70) of this inter-communication request. 2. The first and second communication means (71, 81) are
It is configured to have an in-cargo input / output channel connected to the intra-carriage communication path (74, 84) and an inter-carriage input / output channel connected to the inter-carriage communication path (91). The second connection control means (72, 82) selects the in-carriage input / output channel as the input / output channel of the first and second communication means (71, 81) when an inter- rack communication request is made. The inter-communication system according to claim 1, wherein the inter-communication system input / output channel is selected when an inter-communication request is made. 3. The first and second communication means (71, 81) are
It is configured to have one input / output channel, and the first and second connection control means (72, 82) connect the input / output channel to the internal communication path (7
4. The inter-communication system according to claim 1, wherein the inter-communication system is connected to the inter-communication path (91) when the inter-communication request is made by connecting to the inter-communication system (4, 84).