JPH09200338A - Communication control system and exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To complete the abandonment of a communication message and communication processing within prescribed time based on suitable rules when messages exceed the capacity of communication line. SOLUTION: At main control equipment 50A, a communication line use amount recorder 505 records the number of communication messages exchanged with communication control equipment 40 or plural pieces of auxiliary control equipment 75(a-n) and the length of communication message in a communication line use information storage part 506 as communication line use information. A communication regulator 504 recognizes communication line load related to every communication based on this recorded result and controls the communication with the communication control equipment 40 or plural pieces of auxiliary control equipment 75(a-n) corresponding to this load. Even when a communication line use amount measuring function is not prepared in the environment to construct a communication system on a general-purpose OS and the messages exceed the capacity of communication line, under this control, suitable regulation is enabled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control device having an interface with a communication terminal, a public network and a leased line, a main control device for controlling the communication control device, the communication control device and exchange in the main control device. The present invention relates to a communication control system in which a plurality of devices such as auxiliary control devices for processing information are connected to each other via a communication line.

[0002]

2. Description of the Related Art In this type of conventional communication control system,
Necessary for performing communication processing such as the CPU and memory prepared in the main control unit in order to smoothly perform mixed communication of communication terminals, public networks and leased lines that can be handled by the interface function of the communication control unit. When the resource usage is measured and the resource usage prepared in the main control unit reaches a predetermined value, only the communication message sent from the public network or leased line is processed, and the communication message sent from the communication terminal. I was taking measures to regulate the processing of.

However, according to this conventional processing method, a communication control device having an interface with a communication terminal, a public network and a leased line, a main control device for controlling the communication control device, the communication control device and the above-mentioned communication control device. With the configuration in which multiple auxiliary control units that process information related to exchange processing in the main control unit are connected to each other through a communication line, it is possible to regulate when the capacity of this communication line is exceeded. In some cases, the communication message may not be discarded or the communication process may not be processed within a predetermined time.

Since the communication control is not applied to the auxiliary control device, the communication message may be sent beyond the range that the main control device can process. In this case, the communication capacity of the communication line is reduced. Similar to the case of exceeding the limit, the case where the communication message was discarded or the communication process could not be processed within a predetermined time occurred. In addition, when a communication control system is built on a general-purpose OS, there may be no function for measuring the amount of communication line usage. Therefore, the communication message cannot be discarded and the communication process cannot be processed within a predetermined time.

Further, in this type of conventional communication control system, a unique device having an interface with a communication terminal, a public network, and a leased line, a main controller for controlling the unique device, and the unique device and A communication control system is known in which an auxiliary control device that processes information related to exchange processing in the main control device is connected to the communication control device via a communication line. Regarding the operation of the conventional system having such a configuration, the communication control functions which the various devices have in common such as the communication protocol of the various devices or the flow control of the user application, the priority message control, etc. cooperate to control the communication between these various devices. It was common to do

[0006] Here, it is usual that the above-mentioned various devices have different characteristics. Therefore, in realizing the above-mentioned communication control, communication control between the various devices is performed for all of the above-mentioned various devices having different characteristics. The communication control function for cooperating is required to be implemented, and the configuration is complicated. Further, in such a configuration, it is difficult to realize the communication control for maintaining the real time required for the exchange process between the specific device and the main control device by coordinating the communication control functions of the above various devices. there were.

Further, as an example of this type of conventional communication control system, for example, Ethernet is used as the communication line, and the communication control is configured by mutually connecting a plurality of main control units and auxiliary control units by this Ethernet. There is a system. Here, as a specific example, consider a system in which two private branch exchanges (PBXs) as a plurality of main control devices are connected to a call charge information management device (hereinafter referred to as a charging device) as an auxiliary control device. .

In this type of system, the communication line connecting the PBX and the billing device is RS-232C.
Etc. were generally used. In this case, in the case where one charging device accesses one of the two PBXs to perform a predetermined communication function as described above, the RS-232C has a restriction that the communication device can be connected only one-to-one. It has been necessary to connect to the billing device via special hardware such as an RS-232C accommodating device that can be controlled from both systems of the multiplexed PBX.

On the other hand, when the PBX and the billing device are connected via Ethernet, the above-mentioned special hardware becomes unnecessary. In other words, since Ethernet is a medium that can be connected to a bus, PB of both systems can be added to one Ethernet.
There is a possibility that a combination of communication partners can be freely configured by accommodating the X and the billing device.

However, in actual operation, one billing device can communicate with only one PBX, and it is not enough that a plurality of PBXs are connected to one billing device. Absent. For example, when a duplexed PBX and a billing device are connected to one Ethernet, the billing device needs to be managed so as to communicate with the active PBX. When the system and the standby system are switched, the billing device needs to terminate the communication with the previous active system and restart the communication with the PBX that has newly become the active system.

From this point of view, in this type of conventional system, if there is no means for connecting from the auxiliary control to the active one of the multiple main control units, eventually the auxiliary control unit and the main control unit are connected. It is necessary to connect the device to the device in a 1: 1 ratio, have a communication means in each of the plurality of main control devices, and prepare special hardware for hiding the existence of the plurality of PBXs from the auxiliary control device. In this configuration, not only the above-mentioned special hardware is required and the structure becomes complicated, but also it is impossible to effectively utilize the configurational characteristic of "bus connection" in Ethernet. Further, when the PBX communicates with the billing device by TCP and a failure occurs such as disconnection of the network, both devices cannot detect the failure until a signal for transmission / reception occurs.

As a typical example of this type of system, an electronic exchange system as shown in FIG. 29 is known. This electronic exchange system includes a plurality of line / trunk devices 20 accommodating an extension terminal 10, a communication terminal 11, a public line 12 and a private line 13, and the line / trunk device 20.
A switch unit (time switch 3 that controls the communication path between
5) The exchange-specific device 30 and the exchange-specific device 30 perform exchange processing, and based on this result, the exchange-specific device 30 is instructed to the switch unit 35 and the line / trunk device 20. A system controller (SYSC) 60 that performs control such as switching the connection between the main controller 50 that sends a signal and the exchange-specific device 30 and the external device 70, between the exchange-specific device 30 and the main controller 50, or It is configured to include a communication line 80 for transmitting and receiving control signals between the exchange-specific device 30 and the external device 70.

In the conventional electronic exchange system represented by the configuration shown in FIG. 29, the congestion control is performed according to the processing procedure shown in FIG. 30 in order to ensure the smooth operation of the system. That is, a call request signal is transmitted from the extension terminal 10 (step 301), and this call request signal is received by the main controller 50 via the line / trunk device 20 and the exchange-specific device 30 (steps 302 and 303). When this is done (step 304), the main controller 50 first determines whether or not it is in a congestion state (step 30).
5). Here, if it is not in a congestion state (step 305N
O), the main controller 50 performs a normal call origination process.

On the other hand, if it is in a congestion state (step 30)
5)), main controller 50 determines whether or not extension terminal 10 is a call restriction terminal based on data registered in advance (step 306). Here, when the extension terminal 10 is a call restriction terminal (YES in step 306), the call restriction is performed by discarding the call request signal from the extension terminal 10. On the other hand, when the extension terminal 10 is not the call restriction terminal (step 306 NO), the main control device 50 causes the exchange specific device 30 through the communication line 80.
A switch control request signal is sent to (step 307). In the exchange specific device 30, the time switch 35 receives the switch control request signal (step 308), and performs switching control so that the calling extension terminal 10 can hear the PDT through the corresponding line / trunk device 20 (step 308). Step 309).

As described above, in the above conventional electronic exchange system, when the signal amount between the exchange-specific device 30 and the main control device 50 exceeds a predetermined prescribed value, it is judged as a congestion state and congestion control is performed. It was However, since this congestion control was performed by the main controller 50, all signals generated when the terminal user took the off-hook of the handset, etc.
Trunk device 20, exchange-specific device 30, communication line 80
It will be input to the main controller 50 through the above.
Therefore, in order to recover from the congestion state, the user of the terminal had to rely on a passive element such as refraining from using the terminal. Further, when the congestion state deteriorates, the control signal storage buffer overflows, the control signal is discarded, and there is a possibility that an emergency call may not be connected.

Further, let us consider the processing between the external device and the exchange in this type of electronic exchange system. Now, in the system shown in FIG. 29, an exchange (exchange-specific device 30) connected to an external device 70 by a communication line 80.
Is composed of an exchange processing unit that performs processing based on a processing request from the external device 70 and a communication control unit that receives a processing request sent from the external device 70 through the communication line 80 and transfers the processing request to the exchange processing unit. Shall be.

In the electronic exchange system having such a configuration,
As a method of determining whether or not the frequency with which the exchange receives a processing request from an external device is within a range that can be processed by the processing capacity of the exchange processing unit, the processing request received by the communication control unit and transferred to the exchange processing unit is used. Among them, there is a method of managing how many processing requests that the exchange processing unit has not yet processed are accumulated. That is, when the frequency of receiving the processing request exceeds the processing capability of the exchange processing unit, the processing speed of the exchange processing unit cannot keep up with the frequency of receiving the processing request,
Since the number of processing requests that cannot be processed increases, the situation is monitored.

In the conventional system of this type, the exchange processing unit or the communication control unit of the exchange manages the number of processing requests accumulated without being processed as described above, and When the number exceeds a certain number, the external device is notified, and the output of the processing request is controlled on the external device side to reduce the frequency with which the exchange receives the processing request.

In such output control of the external device, it is possible to directly know from the exchange processing unit or the communication control unit the number of processing requests accumulated without being processed by the communication control unit while being transferred to the exchange processing unit. It is certainly effective when it is possible. However, in a configuration in which the exchange processing unit and the communication control unit operate as different tasks on a general-purpose operating system, depending on the operating system used, the communication control unit may be transferred to the exchange processing unit and may be stored without being processed. In some cases, the number of pending processing requests cannot be known directly from the communication control unit or the exchange processing. In such a case, the above-mentioned conventional supervisory control system cannot manage the number of accumulated processing requests and cannot perform desired output control from an external device.

[0020]

As described above, a communication control device having an interface with a communication terminal, a public network and a leased line, a main control device for controlling the communication control device, the communication control device and the main control device. In the above-mentioned conventional communication control system in which a plurality of auxiliary control devices and the like for processing information relating to the exchange process are connected to each other through a communication line, the resources such as CPU and memory prepared in the main control device are Based on the processing method that regulates communication within the allowable range, if the communication regulation is not applied to the auxiliary control device, or if the communication system is built on a general-purpose OS, measure the amount of communication line usage It is not always possible to provide a function to protect communication from the communication line that exceeds the capacity of the communication line connecting the above various devices. Discard di, communication processing is a problem that can not be processed at a given time.

It is an object of the present invention to perform appropriate regulation when the capacity of the communication line is exceeded, and also to exert communication regulation on the auxiliary control device and to construct communication system on a general-purpose OS. An object of the present invention is to provide a communication control system capable of processing communication message discarding and communication processing within a predetermined time by allowing the application when the function of measuring the usage of the line is not prepared.

Further, a unique device having an interface with a communication terminal, a public network and a leased line, a main controller for controlling the unique device, and an auxiliary for processing information relating to the unique device and exchange processing in the main controller. In the above-mentioned conventional communication control system in which the control device and the communication control device are connected to each other via a communication line, the various devices such as the communication protocol of the various devices or the flow control of the user application, the priority message control, etc. Since the communication control functions that are shared by all of the various devices collaborate to control communication between these various devices, communication for performing cooperative communication control between various devices for all of the above various devices with different characteristics. A control function must be implemented, which complicates the configuration and also causes the communication control functions of the above various devices to cooperate with each other. Possible to realize a communication control for keeping the real-time that organic devices and exchange process between the main controller mutually required there has been a problem that it is difficult.

Another object of the present invention is a unique feature due to an extremely simple configuration in which it is not necessary to mount a communication control function for cooperatively performing communication control between various devices on all of various devices having different characteristics. It is an object of the present invention to provide a communication control system in which the communication control device can collectively and easily realize communication control for maintaining the real-time property required for the exchange processing between the device and the master device.

Further, in the above-mentioned conventional communication control system in which a plurality of main control units and auxiliary control units are mutually connected by Ethernet, the multiplexed main control unit and auxiliary control unit are connected by the Ethernet bus. Although it is possible, the auxiliary control unit and the main control unit are connected in a 1: 1 ratio by not having an effective means for connecting the auxiliary control unit to the working one of the multiplexed main control units. , Having a communication means in each of the plurality of main control device, it is necessary to prepare special hardware for hiding the existence of the plurality of main control device to the auxiliary control device, the structure becomes complicated, There is a problem in that it is not possible to effectively utilize the structural characteristic of "bus connection" in Ethernet. Further, when the main control device communicates with the auxiliary control device by TCP, when a failure such as disconnection of the network occurs, both devices cannot detect the failure until a signal for transmission / reception occurs. There was also.

Still another object of the present invention is to realize connection control between the main control unit and the auxiliary control unit operating as an active system of the multiplexed main control unit with a simple structure and to communicate by TCP. The purpose of the present invention is to provide a communication control system capable of promptly detecting a failure in such a case and promptly dealing with the recovery.

Also, an exchange-specific device composed of a line / trunk device accommodating an extension terminal, a public network, etc., and a switch section for controlling a communication path between the line / trunk devices, and exchange by a signal from the exchange-specific device. In the above conventional switching system, which comprises a main control device for processing and a communication line for transmitting and receiving control signals between the exchange-specific device and the main control device, the signal amount between the exchange-specific device and the main control device is predetermined. If the specified value is exceeded, it is determined to be in a congestion state and congestion control is performed, and since the congestion control was performed by the main control unit, the signal generated by the terminal user off-hooking the handset is Considering that they are all input to the main control unit via a line / trunk device, an exchange-specific device, a communication line, etc., the terminal user must If you have to rely on passive elements such as refraining from end use, and if the congestion state worsens, the control signal storage buffer overflows and the control signal is discarded, which is an emergency. There was a problem such as my phone being disconnected.

Another object of the present invention is that the terminal user can recover from the congestion state without relying on a passive method such as refraining from using the terminal, and the overflow of the control signal storage buffer due to the deterioration of the congestion state. An object of the present invention is to provide a switching system capable of avoiding a situation in which an emergency call is lost and a control signal is discarded, and an emergency call cannot be connected.

Further, the exchange and the external device are connected by a communication line, and the exchange is sent from the external device via the exchange processing section for performing processing based on the processing request from the external device and the communication line. In the above-mentioned conventional electronic switching system configured by a communication control unit that receives a processing request and transfers it to the exchange processing unit, the number of processing requests accumulated in the exchange processing unit or the communication control unit of the exchange as unprocessed. The external device is notified when the number of processing requests exceeds a certain number, and the output of the processing requests is controlled on the external device side so that the frequency with which the exchange receives the processing requests is reduced. However, if the exchange processing unit and the communication control unit operate as different tasks on the general-purpose operating system, the communication control unit may perform the exchange processing depending on the operating system used. The number of processing requests accumulated without being processed while being transferred to the central processing unit cannot be known directly from the communication control unit or the exchange processing unit, and based on the management result of the accumulated processing requests, the external There is a problem that suitable output control from the device cannot be performed.

Still another object of the present invention is that even when the exchange processing unit and the communication control unit operate as different tasks on a general-purpose operating system, the communication control unit does not process the data as it is transferred to the exchange processing unit. The number of processing requests stored in the storage device can be directly known from the communication control unit and the exchange processing unit, and desired output control from an external device can be performed while accurately grasping the number of processing requests stored. To provide an exchange system.

[0030]

A first aspect of the present invention is a communication control device having an interface with a communication terminal, a public network and a leased line, a main control device for controlling the communication control device, and the communication. In a communication control system in which a control device and a plurality of auxiliary control devices that process information regarding exchange processing in the main control device are mutually connected by a communication line, the main control device outputs to the communication control device. Communication message number and communication message length,
Communication number and communication message length output from the communication control device, communication message number and communication message length output to each of the auxiliary control devices, communication message number and communication output from each of the auxiliary control devices A load for obtaining the load of the communication line from the recording means for recording the message length and the number of communication messages transmitted and received between each of the communication control device and the auxiliary control device recorded by the recording means and the communication message length. And a control means for controlling communication between the main control device and each of the communication control device or the auxiliary control device in accordance with the number of communication messages or the load of the communication line. And

Further, the main control device comprises a measuring means for measuring the usage amount of communication processing resources including at least the CPU usage amount and the memory usage amount in the main control device. The communication is controlled according to the measured amount of communication processing resources used.

The recording means includes the number of communication messages and communication message length output from the main controller to the communication controller, the number of communication messages and communication message length output from the communication controller, and the plurality of auxiliary controls. The number of communication messages output to each of the devices and the communication message length, the number of communication messages output from each of the plurality of auxiliary control devices, and the communication amount within a predetermined fixed time for each of the communication message lengths are recorded. The communication means within the fixed time, and the control means uses the communication line based on the number of communication messages and the communication message length within the fixed time recorded by the communication time recording means within the fixed time. The communication is controlled in order or in descending order of the number of communication messages within the fixed time.

The main controller is the communication controller,
The control means includes a regulation order registration means for registering a communication regulation order for each of the plurality of auxiliary control devices, and the control means
When performing communication control according to the communication load with the communication control device or the auxiliary control device, the communication control is performed according to the communication regulation order registered by the regulation order registration means.

Further, the main control device includes a configuration information registration means for registering a communication control device or a plurality of auxiliary control devices using the same communication path as configuration information, and a plurality of devices registered by the configuration information registration means. A line-corresponding load calculating means for determining, for each communication line, the load of the communication line being used from the number of communication messages transmitted / received to / from the main control device and the communication message length; The communication is controlled according to the communication load of the communication line for each time.

A second aspect of the present invention is a unique device having an interface with a communication terminal, a public network and a leased line, a main controller for controlling the unique device, the unique device and the main controller. In a communication control system comprising a communication control device and a plurality of auxiliary control devices that process information relating to exchange processing in
The communication control device stores identification information registering means for registering identification information for identifying each device of the unique device, the main control device and the auxiliary control device, and specific information in a communication message transmitted and received between the devices. The communication device identifying means for translating and identifying the transmission source device and the transmission destination device of the communication message by referring to the identification information registered in the identification information registering device, and the device identified by the communication device identifying device are transmitted and received. Calculating means for calculating the communication message length of the communication message, and measuring the communication load between the respective devices based on the communication message length calculated by the calculating means, and between the respective devices according to the communication load. And a communication control means for controlling the communication.

Further, the communication control means communicates between the specific device and the main control device when a communication line between the communication control device and the specific device or the main control device reaches a predetermined communication load. And restricts communication between the specific device and devices other than the main control device.

Further, the communication control means obtains a communication load for each of the communication lines based on the communication message length calculated by the calculating means, and performs the communication control according to the result of comparison with the allowable load of the communication line. It is characterized by

Further, the communication control means is characterized by setting a communication load capable of maintaining the real-time property of the exchange processing between the specific device and the main control device as an allowable load of the communication line.

Further, the registration of the identification information in the identification information registration means is performed at the time when the unique device, the main control device and the auxiliary control device are connected to the communication control device.

A third invention of the present invention is a communication control system comprising a plurality of multiplexed main control devices connected to an auxiliary control device via a communication line, wherein the main control device is the auxiliary control device. Interface means for transmitting and receiving a connection control signal to and from the device, activation means for activating the interface means when the device itself starts operation as an active system, and a connection request signal received through the interface means A connection admission control means for returning a connection admission signal, wherein the auxiliary control device transmits / receives a connection control signal to / from the main control device; and all the main control devices through the interface means Connection request control means for sequentially transmitting connection request signals to An active system selecting means for establishing a connection by the connection acceptance signal returned from the main control device in response to the connection request signal and selecting an active main control device; It is characterized in that communication between one active device and the auxiliary control device is selectively established and operated.

Further, the main control unit releases the connection established with the auxiliary control unit at the time when its own device shifts from the active system to the standby system, and the interface at the time when it shifts to the standby system. Means for deactivating means, the auxiliary control device, the connection monitoring means for monitoring whether the connection is establishing or releasing, and when the connection release is detected by the connection monitoring means, Startup control means for activating the active system selecting means, and when the main control device is switched from the active system to the standby system, the auxiliary control device itself performs connection switching to a new active system main control device. It is characterized by

Further, the main control device sends a predetermined monitoring signal describing signal information to be sent next time to the auxiliary control device at an arbitrary and variable time interval, and a response from the auxiliary control device to the monitoring signal is sent. It is characterized by comprising a signal monitoring means for monitoring and an abnormality detecting means for detecting an occurrence of an abnormality when a response to the monitoring signal is not returned within a preset time.

Further, the auxiliary control device sends a response signal to the supervisory signal when receiving the supervisory signal sent from the main control device, and the signal information described in the supervisory signal. An abnormality detecting means for detecting an abnormality occurrence when the next monitoring signal is not received within the next transmission time or within a time obtained by adding a predetermined margin time to the next transmission time.

Further, the main control device comprises a basic time holding means for setting and holding a basic time relating to the transmission interval time of the monitoring signal, directly or externally, a processing load detecting means for detecting a processing load of the processor, and A communication load detection unit that detects a communication load with the auxiliary control device, and a fluctuation time calculation unit that calculates an appropriate fluctuation time based on the processing load or the communication load are held by the basic time holding unit. It is characterized in that a time obtained by adding the fluctuation time to the basic time is set as a transmission interval time of the monitoring signal.

In the modification of the third invention, a plurality of multiplexed main control devices are connected to an auxiliary control device by a communication line, and the active system of the plurality of main control devices is used. In the communication control system that selectively establishes and operates communication between one device and the auxiliary control device, the main control device includes interface means for transmitting and receiving a connection control signal to and from the auxiliary control device, Status display indicating the activation means for activating the interface means regardless of whether the own device is the active system or the standby system, and the auxiliary control device that has established a connection through the interface means, indicating the active system or the standby system. And a status information sending means for sending a signal, wherein the auxiliary control device is
Interface means for transmitting and receiving a connection control signal to and from the main control device; connection establishing means for establishing a connection by sending a connection acceptance signal to all the main control devices through the interface means; and the main control device From the main control unit of the active system according to the state described in the status display signal sent from the active system selection means. A fourth aspect of the present invention is a switch-specific device having a plurality of line / trunk devices accommodating extension terminals, public networks, and leased lines, and a time switch for controlling a communication path between the line / trunk devices. , A main control unit that performs an exchange process by a signal sent from the exchange-specific device and sends an instruction signal to the time switch and the line / trunk device to the exchange-specific device based on the processing result via a communication line. In the switching system formed by connecting, the exchange-specific device includes number extracting means for extracting a port number of a call request terminal from a call request signal transmitted from the line / trunk device, and the time switch from the main control device. Information extracting means for extracting information corresponding to the port number from the control signal sent to the Reference is made to the management means for managing the port number outside the domain in association with the service class of the terminal and the congestion level, and the port number managed by the management means, and it corresponds to the port number extracted by the number extraction means. The main control device is provided with a determining means for determining whether or not to restrict transmission of the terminal, and the main control device determines whether to transmit the terminal according to the service class of the terminal receiving the call request and the communication load of the communication line. Comprising a deciding means for deciding whether or not to regulate, monitoring the communication load of the communication line in the main control device and the exchange peculiar device, when the communication load exceeds a predetermined level, It is characterized in that both the main control device and the exchange-specific device perform communication regulation control based on the level and the service class of the terminal.

Further, when the communication load of the communication line reaches a certain level or higher, the main control unit determines the terminal number from the port number in the call request signal of the extension terminal received from the exchange-specific device through the communication line. The service class is extracted, and whether or not to restrict outgoing call is determined according to the service class and the level of the communication load. It is characterized by transmitting a control signal to the device and continuing the exchange process.

Further, when the exchange-specific device receives the call request signal from the extension, it determines whether the port number of the extension is registered as a port for restricting outgoing call, and if it is registered, The call request signal is discarded by the device itself,
If not registered, it is registered as a port of the call restriction, and the call request signal is transmitted to the main control device through the communication line, and thereafter, the call control is not restricted by the main control device. Information corresponding to the port number is extracted from the control signal sent from the main control device to the time switch at the time of determining, and the port is deleted from the port of the outgoing call regulation and is registered in the port not subject to the outgoing call regulation. It is characterized by

When receiving the call request signal from the extension, the exchange-specific device unconditionally sends the call request signal if the port number of the extension is registered in a port not subject to call regulation. The data is transmitted to the main control device through the communication line.

A fifth aspect of the present invention comprises an exchange and an external device connected by a communication path, wherein the exchange is
An exchange having an exchange processing unit that performs processing based on a processing request from the external device, and a communication control unit that receives a processing request sent from the external device through the communication path and transfers the processing request to the exchange processing unit. In the system, the external device comprises request number assigning means for assigning a number to each processing request sent to the exchange, and the exchange requests the processing request received from the external device in the communication control unit. Request number storage means for storing the number of the processing request when transferring the processing request to the exchange processing section, and the processing when performing processing based on the processing request transferred from the communication control section in the exchange processing section. Request number notifying means for notifying the request number to the communication control section, and the request number notifying means and the number stored in the request number storage section in the communication control section By comparing a more informed number, characterized by comprising the outstanding requests number estimating means for estimating the number of processing requests in the state of the transferred left untreated to the exchange processing unit.

In the exchange, in the communication control unit, when the number of unprocessed requests estimated by the unprocessed request number estimating means exceeds a certain value, regulation or communication of signal output to the external device is performed. It is characterized by comprising a communication regulation control means for disconnecting the connection.

According to the fifth aspect of the invention, a plurality of external devices are connected to one exchange through a communication path, and the exchange has the unprocessed request number estimating means in the communication control unit for each external device. Estimate the outstanding request corresponding to the device, and if the number of outstanding requests corresponding to any one of the external devices exceeds a certain value, restrict the signal output to the corresponding external device or disconnect the communication connection. It is characterized by performing.

According to the fifth aspect of the invention, a plurality of external devices are connected to one exchange through a communication path, and the exchange has the unprocessed request number estimating means in the communication control unit. Estimate the outstanding requests corresponding to a device, and if the total number of outstanding requests exceeds a certain value, control the signal output or connect to the communication with all external devices or the external device with the largest number of outstanding requests. It is characterized by performing the cutting of.

[0053]

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of a communication control system according to the first invention. This communication control system includes a communication control device 40 having an interface with a communication terminal 10 such as a telephone terminal, a communication terminal 11 such as a personal computer or a workstation, a public line 12, a leased line 13, and the like. And a plurality of auxiliary control devices 75 (distinguished by the symbols a to n) that process information related to the above-mentioned exchange process, and a communication control device 40. The main controller 50A is connected by a communication line a, and the main controller 50A and each auxiliary controller 75 (a-n) are connected by communication lines b-n.

In this communication control system, the communication control device 40 is a component part including the exchange-specific device 30 and the line / trunk device 20 in the basic system shown in FIG. The control device 50 and the auxiliary control device 75 correspond to the external device 70 in the basic system.

The main control unit 50A has a communication control unit communication unit 501 for communicating with the communication control unit 40 via the communication line a, and the above auxiliary control units 75 (a ... n), a plurality of auxiliary control device communication devices 502 (identified by symbols a to n), a communication processing device 503 that performs exchange processing and communication processing, a main control device 50A and the communication control device 40, or the main control device. 50A and communication control device 504 for controlling communication control between each auxiliary control device 75 (a to n), communication line usage recording device 505 for recording the amount of use of each of the communication lines a to n, use of communication line A communication line use information storage unit 506, which is a storage medium of the communication line use information by the quantity recording device 505, is provided.

As can be seen from the figure, the communication terminal 10,
The communication terminal 11, the public line 12, and the leased line 13 are accommodated in the present communication control system via the communication control device 40. The communication control device 40 analyzes the communication processing request or communication information transmitted from the communication terminal 10, the communication terminal 11, the public line 12, and the leased line 13, and the main control device 50 through the communication line a.
The communication processing request or the communication information transmitted from the main controller 50A through the communication line a is analyzed while controlling the communication terminal 10, the communication terminal 11, the public line 12, and the leased line 13.

The communication processing request and communication information between the communication control unit 40 and the main control unit 50A are transmitted and received as a message through the communication line a, and the main control unit 50A uses the communication control unit communication unit 501 to perform communication control. It communicates with the device 40. Each of the auxiliary control devices 75 (a to n) for processing the information regarding the exchange process and the main control device 50A are connected via the communication lines b to n, and in the main control device 50A,
Each auxiliary control device communication device 502 is used to communicate with each of the auxiliary control devices 75 (a to n).

Communication Control Device The communication processing request and communication information analyzed by the communication device 501 and each auxiliary control device 75 (a to n) are subjected to exchange processing and communication processing by the communication processing device 503. Then, the communication processing device 503 outputs the communication processing request and the communication information to the communication control device 40 through the communication control device communication device 501 and the communication line a as required, or each auxiliary control device communication device 502. (A ~
n), each auxiliary control device 75 (a) through the communication lines b to n.
To n).

The communication control device communication device 501 and each auxiliary control device communication device 502 (a-n) are the communication control device 40,
A communication message sent from each auxiliary control device 75 (a to n) to the main control device 50A and sent from the main control device 50A to the communication control device 40 and each auxiliary control device 75 (a to n). When the communication message is received, the communication line usage information storage unit 505 is used to record the communication line usage information in the communication line usage information storage unit 506. FIG. 2 shows an example of communication line usage information stored in the communication line usage information storage unit 506 by the communication line usage amount recording device 505.

Next, the process of generating the communication line use information will be described. When the communication control device communication device 501 receives the communication message transmitted from the communication control device 40 to the main control device 50A, the communication control device communication device 501 uses the communication line usage amount recording device 505 to perform communication in the communication line usage information storage unit 506. One is added to the total number of received messages of the control device 40, and the received communication message length is set to the communication control device 40.
Add to the total received message length of. Similarly, when the communication control device communication device 501 receives a communication message transmitted from the main control device 50A to the communication control device 40, the communication control device communication device 501 uses the communication line usage amount recording device 505 to determine the total communication control device 40. One is added to the number of transmitted messages, and the received message length is added to the total transmitted message length.

On the other hand, each auxiliary controller communication device 502 (a
To n), when receiving the communication message sent from each corresponding auxiliary control device 75 (a to n) to the main control unit device 50A, the communication line usage recording device 505 is used to use the communication line. One is added to the total number of received messages of each auxiliary control device 75 (a to n) in the information storage unit 506, and the received message length is added to the total received message length. In addition, each auxiliary control device communication device 502 (a ~
In n), when the communication message sent from the main control device 50A to each corresponding auxiliary control device 75 (a to n) is received, the communication line usage information storage unit 506 is used by using the communication line usage amount recording device 505. 1 is added to the total number of transmitted messages of each corresponding auxiliary control device 75 (a to n) in
The message length of the received communication message is added to the total transmission message.

The communication control device 504 is a main control device 50A.
And the communication control device 40 or each auxiliary control device 75 (a to
The communication line usage information for each of the communication lines a, b to n connecting n) is stored in the communication line usage information storage unit 506 by using the communication line usage information recording unit 505. The total number of transmitted messages, the total transmitted message length, the total number of received messages, and the total received message length), and the line usage amount for each communication line is compared with the capacity registered for each communication line in advance. FIG. 3 shows an example of the registration information of the communication line capacity registered in advance.

Thereafter, in the communication regulation device 504, if the usage amount of the communication line has reached the predetermined usage amount as a result of the comparison, the device using the communication line which has reached the predetermined usage amount of the communication line. To the (communication control device 40 or each auxiliary control device 75 (a to n)), a signal for stopping the transmission of the processing request is transmitted, and the communication line that has reached the predetermined communication line usage amount is used. Stops sending the communication message received by itself to the communication processing device 503 to the communication device (communication control device communication device 501 or each auxiliary control device communication device 502 (a to n)) that communicates with these devices. Or a communication device (communication control device communication) which communicates with the device (communication control device 40 or each auxiliary control device 75 (a to n)) that has reached the line usage amount to the main control device 50A. By sending a request to stop processing from the apparatus 501 or each auxiliary control unit communication apparatus 502 (a~n)), controls communication between the main control unit 50A.

In the above communication control, the method of calculating the amount of use of the communication line without particularly defining the time has been described. May be performed.
FIG. 4 shows that in the communication control based on this method, the communication line usage recording unit 505 uses the communication line usage storage unit 50.
6 shows an example of communication line use information within a fixed time which is held separately from the communication line use information shown in FIG.

In this case, the communication line usage recording device 505
As the information relating to the communication line usage amount recorded in step 1, in addition to the communication line usage information shown in FIG.
The number and length of communication messages sent from each auxiliary control device 75 (a to n) to the main control device 50A within a fixed time, the main control device 50A to the communication control device 40, and each auxiliary control device 75 (a to n). ), Information for recording the number of communication messages and the communication message length transmitted within a fixed time may be added.

Further, the creation of the communication line use information in this case is processed as follows. The communication control device communication device 501, each auxiliary control device communication device 502 (a to n),
The communication control device 40 receives the signal message sent from the communication control device 40 and each auxiliary control device 40 to the main control device 50A, and uses the communication line use amount recording device 505 to use the communication line in the communication line use information storage unit 506. When recording the total received message number and the total received message length of information, the communication line usage recording device 505 adds 1 to the total received message number of the table in FIG. 2 and adds the received message length to the total received message length. In addition, the total number of received messages of the corresponding device in the table of FIG.
And the received message length is added to the total transmitted / received message length within a fixed time.

Similarly, the communication control device communication device 501, each auxiliary control device communication device 502 (a-n), from the main control device 50A to the communication control device 40, each auxiliary control device 75 (a).
To n), the total number of transmitted messages and total transmitted message length of the communication line usage information in the communication line usage information storage unit 506 are received using the communication line usage recording device 505. At the time of recording, the communication line usage amount recording device 505 adds 1 to the total number of transmitted messages in the table in FIG. 2 and adds the received message length to the total transmitted message length. 1 for the total number of sent messages within a fixed time
Is added, and the received message length is added to the total transmitted message length within a fixed time.

The subsequent communication control is performed as follows.
The communication regulation device 504 stores the communication line usage amounts of the communication lines a and b to n that connect the main control device 50A, the communication control device 40, and the auxiliary control devices 75 (a to n), and the communication line usage amount recording device 505. Using the communication line use information storage unit 50
From the communication line usage information in 6, the total number of transmitted messages within a certain period of time, the total transmitted message length within a certain period of time, the total number of received messages within a certain period of time, and the total received message length within a certain period of time are obtained. The communication line usage amount is compared with the capacity of each communication line registered in advance.

As a result of this comparison, when there is a communication line which has reached the predetermined usage amount, the communication regulation device 504 uses the device (communication control) which uses the communication line which has reached the predetermined usage amount. Device 40 or each auxiliary control device 75
(A to n)), a communication device that transmits a signal for stopping the transmission of the processing request and communicates with these devices using the communication line that has reached a predetermined communication line usage amount ( The communication control device communication device 601 or each auxiliary control device communication device 502 (a to n)) sends a signal for stopping the sending of the communication message received by itself to the communication processing device 503, or the main control device. A communication device (communication control device communication device 501 or each auxiliary control device communication device 502 (that communicates with a device (communication control device 40 or each auxiliary control device 75 (a to n)) whose line usage has reached 50A) The communication with main controller 50A is controlled by sending a request to stop the processing from a to n)).

Next, as another embodiment of the first aspect of the present invention, an example in which communication control is performed based on the amount of communication processing resources used will be described. FIG. 5 is a block configuration diagram of the communication control system of this example, and the same reference numerals are given to the parts that perform the same functions as the respective parts of the system in FIG. In the main controller 50B of this system, in addition to the constituent elements of the main controller 50A in FIG. 1, communication processing resource usage for measuring the amount of CPU and memory usage required for the communication processing device 503 to perform communication processing. A quantity measuring device 507 is provided.

The communication processing resource usage amount measuring device 507 measures the usage amount of resources such as CPU and memory used by the main control device 50B to perform communication processing such as exchange processing.
When any of the resources necessary for providing the communication processing reaches a preset usage amount, a communication processing control request is sent to the communication regulation device 504.

The communication regulation device 504 uses the communication line usage amount recording device 505 to determine the communication line usage information storage unit 50.
From the communication line usage information in 6, the sum of the total number of sent messages and the total number of received messages of each device, or the sum of the total number of sent messages within a fixed time and the total number of received messages within a fixed time Or, determine the frequency of use, send a signal to stop sending the processing request to the device with the highest communication frequency, and send the communication message received to the communication device that communicates with the device with the highest communication frequency. By sending a signal to stop sending to the main control device 50B or sending to the communication processing device 503 a request to stop processing from a communication device that communicates with a device with the highest communication frequency, It controls communication with the control device 50B.

When the amount of resources used for communication processing in the main controller 50B has reached a preset amount even though the communication control has been performed for the device with the highest communication frequency, Next, communication control is performed on the device with the highest communication frequency, and thereafter, similar control is continued until the usage of the communication line falls below a preset usage.

Next, as another embodiment of the first invention, an example of communication control by communication control priority will be shown. FIG.
2 is a block configuration diagram of the communication control system of this example. In addition to the components of the main control device 50A in FIG.
Communication resource usage amount measuring device 507 and communication regulation device 504 for measuring the amount of CPU and memory usage required for communication processing by the main controller 50C and communication controller 40 or main controller 50C and each auxiliary control Device 75 (a to n)
Communication priority registering device 508 for registering the restriction priority used for communication restriction control between the two, communication control priority registering device 5
A communication control priority registration information storage unit 509 that stores communication control priority registration information registered by 08 is provided.

In this system, the communication control priority registration device 508 is used to control communication when the amount of resources used for communication processing such as the CPU and memory exceeds a preset amount. The communication control priority registration information describing the order of performing is registered in advance in the communication control priority registration information storage unit 509. Thereby, for example, the auxiliary control device 75
The communication control priority registration information when the communication control is performed in the order of a, the auxiliary control device 75b, ...
The form is as shown in.

The communication processing resource usage amount measuring device 507 measures the usage amount of resources such as CPU and memory used by the main control device 50C to perform communication processing such as exchange processing, and one of the resources is previously measured. When the set usage amount is reached, a communication processing control request is sent to the communication regulation device 504.

The communication control device 504 uses the communication control priority registration device 508 to store the communication control priority registration information storage unit 50.
The communication control priority information registered in No. 9 is read, a signal for stopping the transmission of the communication processing request is sent to the auxiliary control device 75a having the lowest priority, and the auxiliary control device 75a having the lowest priority Auxiliary control device for communication 502a sends a signal to stop the transmission of the received communication message to the communication processing device 503, or the auxiliary control device 75a having the lowest priority to the communication processing device 503. The communication with the main control device 50C is controlled by sending a request to stop the processing from. Here, when the amount of resources used for communication processing in the main controller 50C has reached a preset amount, even though communication control has been performed for the device with the lowest priority, Next, communication control is performed for the auxiliary control device 75b having the lowest priority. After that, the communication control is sequentially applied to the lower priority devices until the amount of resources used for communication processing in the main control device 50C becomes smaller than a preset amount.

Next, as still another embodiment of the first invention, an example of communication control when a plurality of devices use the same line will be shown. FIG. 8 is a block configuration diagram of the communication control system of this example. In addition to the components of the main control device 50C in FIG. 6, the main control device 50D of the present system includes a main control device 50D and a communication control device 40. , The communication line configuration information registration device 510 for registering the configuration of the communication line between the main control device 50D and each of the auxiliary control devices 75 (a to n), and the communication line configuration information registered by the communication line configuration information registration device 510. A communication line configuration information storage unit 511 for storing is provided.

In this system, the communication line configuration information registration device 510 is used in advance to set the communication line configuration information describing which device uses which communication line in the communication line configuration information storage unit 511. In FIG. 9, the communication control device 40 uses the communication line a, the auxiliary control device 75a uses the communication line b, and the auxiliary control device (n-1) and the auxiliary control device n share the communication line n. It is an example of communication line configuration information in the case.

The communication control device 504 is the main control device 50D.
And communication control device 40, main control device 50D and each auxiliary control device 75a, 75b, 75 (n-1), when checking the usage of communication lines a, b, n connecting 75n, communication line configuration information registration device Using 510, the communication line configuration information is read from the communication line configuration information storage unit 511, it is searched whether or not another device using the same communication line is registered, and the same communication line is used. When the device that is found is searched, the total number of transmitted messages, total transmitted message length, total received message number, and total received message length of the searched device are added for each item, and the total number of transmitted messages on the communication line is calculated.
The total transmitted message length, the total number of received messages, and the total received message length are calculated.

From the calculated total number of transmitted messages and total transmitted message length of the communication line, total received message number and total received message length, the communication line usage amount is obtained, and the communication line usage amount becomes a preset usage amount. When it is achieved, the communication regulation device 504 determines that the device (communication control device 40 or each auxiliary control device 75 (a to n)) using the line whose usage amount has reached the preset usage amount. A communication device (communication device that performs a communication process using a communication line that has reached a preset usage amount in the main control device 50D, while sending a request to stop communication processing requests to the main control device 50D to all For each of the control device communication device 501 or each of the auxiliary control device communication devices 502 (a to n), the transmission of a communication processing request from each of these devices to the communication processing device 503 is stopped. The communication with the main control device 50D is controlled by sending a request or sending a request for stopping the processing of the processing request from the device that has reached the preset communication capacity to the communication processing device 503. .

In this system (see FIG. 8), in addition to the above communication control, when the communication line to be used reaches a preset communication capacity, the communication regulation device 504 regulates the communication in order from the device with the highest usage amount. It can also be controlled as desired. In this case, the communication regulation device 504, based on the communication line use information stored in the communication line use information storage unit 506, the total number of transmitted messages of each device accommodated in the communication line, the total transmitted message length, and the total transmitted message length. The number of received messages and the total received message length are added for each item to calculate the total number of transmitted messages of the communication line, the total transmitted message length, the total number of received messages, and the total received message length.

Then, the usage of the communication line is determined from the calculated total number of transmitted messages and total transmitted message length of the communication line, total received message number and total received message length, and the used amount of communication line is preset. When the usage amount is reached, the total number of sent messages and the total sent message length, and the total number of received messages and the total received message length of the device using the line where the usage amount of the communication line has reached the preset usage amount Search for the device with the highest communication line usage.

Thereafter, the communication control device 504 instructs the main control device 50D to the device (communication control device 40 or each auxiliary control device 75 (a to n)) that uses the most communication line.
A communication device (communication control device communication device 501 or each auxiliary device) that sends a request to stop the communication processing request to the Control device communication device 5
02 (a to n)), the device that uses the most communication lines sends a request to stop sending the communication processing request to the communication processing device 503, or the communication processing device 50
The communication with the main control device 50D is controlled by sending a request for stopping the processing of the processing request from the device having the largest communication line usage to the device 3.

Here, the communication line usage amount is preset even though the communication control is performed with the device with the largest communication line usage amount among the communication lines that have reached the preset communication capacity. When the usage amount has been reached, communication control with the main controller 50D is performed for the device with the next largest usage amount,
After that, the same control is continuously performed until the usage of the communication line falls below the preset usage.

Further, in the present system (see FIG. 8), when the communication line to be used reaches a preset usage amount, it is possible to control so as to regulate the communication in a preset priority order. In this case, the communication regulation device 504 adds the total number of transmitted messages, the total transmitted message length, the total number of received messages, and the total received message length of each device accommodated in the communication line for each item to obtain the total transmitted message of the communication line. number,
The total transmitted message length, the total number of received messages, and the total received message length are calculated. Then, the usage amount of the communication line is obtained from the calculated total number of transmitted messages and total transmitted message length of the communication line and total number of received messages and total received message length, and the used amount of the communication line becomes a preset amount of use. If achieved, the device having the lowest priority among the devices using the communication line is used as the communication control priority registration information storage unit 509 by using the communication control priority registration device 508.
It is detected from the communication control priority registration information read from.

Thereafter, the communication regulation device 504 requests the device having the lowest priority (communication control device 40 or each auxiliary control device 75 (a to n)) to stop the communication processing request to the main control device 50D. A communication device (communication control device communication device 501 or each auxiliary control device communication device 502 (a ...
n)), a request for stopping the transmission of the communication processing request from the device having the lowest priority to the communication processing device 503 is sent, or the processing request is processed from the device having the lowest priority to the communication processing device 503. The communication with main controller 50D is controlled by sending out a request to stop.

Here, even though the communication control is performed with the device having the lowest priority among the communication lines that have reached the preset communication capacity, the used amount of the communication line reaches the preset used amount. If it is, the communication control with the main control device 50D is performed on the device with the next lowest priority, and thereafter, the same control is performed until the usage of the communication line falls below the preset usage. To continue.

As described above, in the first invention, the main control unit outputs the number of communication messages and the communication message length output to the communication control unit, the number of communication messages and the communication message length output from the communication control unit, Recording means for recording the number and communication message length of communication messages output to each of the auxiliary control devices, and the number and communication message length of communication messages output from each of the auxiliary control devices, and communication control recorded by the recording means Load calculation means for obtaining the load of the communication line from the number of communication messages transmitted and received between the device and the auxiliary control device and the communication message length; and the main control device and the communication control device according to the number of communication messages or the load of the communication line, or By providing a control means for controlling the communication between the auxiliary control devices, the communication processing according to the capacity of the communication line is performed. It can discard the communication message, the communication processing can be processed within a predetermined time. Also,
Even if the function to measure the usage of the communication line is not prepared when the communication system is built on a general-purpose OS,
The communication process can be performed according to the capacity of the communication line, and the communication message can be discarded and the communication process can be performed at a predetermined time.

Further, the main control device is provided with a measuring means for measuring the usage amount of the communication processing resources including at least the CPU usage amount and the memory usage amount in the main control device, and the control means is measured by the measuring means. By controlling the communication between the main control unit and the communication control unit or between the main control unit and the auxiliary control unit according to the amount of communication processing resources used, the main control unit and the communication control unit, and the main control unit and the auxiliary control unit. If the resources required for the communication processing of the main control unit are insufficient before the capacity of the communication line between the devices is exceeded, it becomes possible to regulate the communication request from the communication control unit and the auxiliary control unit.

The recording means includes the number of communication messages and the communication message length output from the main control unit to the communication control unit, the number of communication messages and the communication message length output from the communication control unit, and the number of the communication messages of the plurality of auxiliary control units. The number of communication messages output to each of them, the communication message length, the number of communication messages output from each of the plurality of auxiliary control unit devices, and the communication amount within a predetermined fixed time for each communication parameter of the communication message length The communication means includes a recording means for recording the communication amount within a fixed time, and the control means, based on the number of communication messages and the communication message length within the fixed time recorded by the communication amount recording means within the constant time, in the order of using the communication line or By controlling the communication with the main control unit in the descending order of the number of communication messages within the fixed time, the communication line usage amount When the resources required for communication processing in the main control unit are insufficient, it is possible to quickly avoid the situation where the capacity of the communication line is exceeded or the resources in the main control unit are insufficient. It is possible to solve the problem that communication messages cannot be processed within a predetermined time due to the discarding of communication messages caused by the lack of resources or the lack of resources in the main control device.

Further, the main control device comprises a communication control device and a regulation order registration means for registering the communication regulation order for each of the plurality of auxiliary control devices, and the control means communicates with the communication control device or the auxiliary control device. When the communication control is performed according to the communication load, the communication control is performed in accordance with the communication regulation order registered by the regulation order registering unit, so that the communication line usage amount or the communication processing in the main control device is performed. Even if the resources for performing communication are insufficient, the communication control with the device with a higher priority is not regulated, but the communication with the device with a lower priority is regulated. It is possible to minimize the deterioration of service of the system.

Further, the main control device includes a configuration information registration means for registering a communication control device or a plurality of auxiliary control devices using the same communication path as configuration information, and a plurality of devices registered by the configuration information registration means. A line-corresponding load calculating means for determining, for each communication line, the load of the communication line being used from the number of communication messages transmitted and received to and from the main control device and the communication message length, and the control means is provided for each communication line. Since communication is controlled according to the communication load of the communication line, communication between the main control unit and each device that uses the same communication line can be controlled, and communication messages are discarded and communication processing is specified. Will be able to process in time.

FIG. 10 is a diagram showing an embodiment of a communication control system according to the second invention. This communication control system includes a unique device 30A having an interface with the communication terminal 10, the public network 12A or a dedicated line, a main controller 50E for controlling the unique device 30A, and the unique device 3 described above.
0A and a plurality of auxiliary control devices 75 (which are distinguished by symbols a to c) that process information related to exchange processing in the main control device 50E, and these unique devices 30A and main control device 50.
E, a communication control device 40A for connecting the auxiliary control devices 75 (a-c) to each other via a communication path 80. In particular, in this example, Ethernet is used as the communication line 80 connecting the various devices.

In this communication control system, the unique device 30A and the communication control device 40A are the same as those of the basic system shown in FIG. 29 including the exchange unique device 30 and the line / trunk device 20, and the main control device 50E is the same. Auxiliary controller 75 is provided in main controller 50 in the system.
(A to c) correspond to the external devices 70 in the basic system, respectively. The communication control device 40A of this system is
As shown in FIG. 11, the line termination unit 401 and the communication control unit 40
2, information table read / write unit 403, information table 40
4, communication message translation unit 405, communication load measurement unit 40
6. A timer 407 is provided.

The line terminating unit 401 is for terminating the communication line 80 used for communication with the above-mentioned various devices, and the communication terminal 80 and the public network 12A of the transmission source are connected by the communication line 80.
Alternatively, a communication message sent from a dedicated line or the like via the unique device 30A is transferred to the communication control unit 402.

The communication control unit 402 controls the transmission of the communication message transferred from the line terminating unit 401 to the designated destination, and analyzes the contents of the communication message to reduce the communication load described later. It also performs recognition processing.

The communication messages handled by the present system include a device information registration communication message sent only once from the various devices when the various devices are connected to the communication control device 40A, and this device information registration communication. There is a general communication message repeatedly sent from each sender after the message.

FIG. 12A shows an example of the format of the device information registration communication message. The physical address of the Ethernet of the destination device, the physical address of the Ethernet of the source device, the protocol header, and the source of transmission. It is composed of the device name of the device, the allowable communication load of the communication line used by the transmission source device, and the information element of the line termination number. In particular, the line terminating unit number in this is added by the line terminating unit 401 in the communication control device 40A through which the device information registration communication message is sent for the first time.

FIG. 12B shows an example of the format of a general communication message other than the above device information registration communication message. The physical address of the Ethernet of the transmission destination device and the physical address of the Ethernet of the transmission source device are shown. , Protocol header, and user data information elements.

Next, the control operation of the communication control device 40A for both of the above communication messages will be described. When the above various devices are connected to the communication control device 40A, a communication message for device information registration sent from the various devices to the communication control device 40A only once prior to all communication messages is a line in the communication control device 40A. Termination part 40
The line control unit number is added by 1 and the communication control unit 402
Is forwarded to

When the communication control unit 402 recognizes that the transferred communication message is a device information registration communication message, it sends the device information registration communication message to the information table read / write unit 403. Here, the information table read / write unit 403 reads the physical address, the device name, and the allowable communication load on the device information communication message, and sets these pieces of information in the information table 404.

On the other hand, the general communication message sent after the above device information registration communication message is recognized as the general communication message by the communication control unit 402 in the communication control device 40A, and is sent to the communication message translating unit 405. Transferred. Here, the communication message translation unit 405
The transmission source physical address and the transmission destination physical address of the communication message are read, the communication message length is measured from the data amount of the "user data" of the communication message, and each of these pieces of information is read and written in the information table read / write unit 403.
Transfer to The information table read / write unit 403 simultaneously receives the current cumulative communication message length corresponding to the physical address on the information table that matches the source physical address and the destination physical address of the information received from the communication message translating unit 405. A process of adding the communication message length is performed. Through the above processing, the information table 40
For example, data having the content as shown in FIG. 13 is set in 4.

Further, in the communication control unit 40A, the communication load measuring unit 406 is activated every unit time counted by the timer 407. At the time of activation for each unit time, the communication load measuring unit 406, through the information table reading / writing unit 403, obtains the current cumulative communication message length and the old cumulative communication message length corresponding to the unique device 30A and the main control device 50E on the information table 404. It is read and the difference is calculated, and each of the calculated values is set to the unique device 30A and the main controller 5
It is recognized as the communication load of the communication line of 0E. At the same time, after calculating the difference, the communication load measuring unit 406 controls the information table reading / writing unit 403 to copy the current cumulative communication message length on the information table 404 to the old cumulative communication message length.

Next, the communication load measuring unit 406 calculates the value of the communication load of the communication line corresponding to each device calculated as described above, and each communication read from the information table 404 by the information table reading / writing unit 403. Compare with the allowable communication load of the line. As a result of this comparison, if any communication load is larger than the corresponding allowable communication load,
The communication control unit 402 is notified of a line termination number other than the line termination unit 401 at which the communication lines of the unique device 30A and the main control device 50E are terminated, and a communication regulation request, and any communication load is allowed. If it is not determined that the load is larger than the communication load, the communication control unit 402 is notified of the communication restriction release request.

As a result, the communication control unit 402 controls so as to discard the communication message from the line terminating unit 401 corresponding to the notified line terminating number while receiving the communication regulation request, and the above line It controls a communication message from other than the terminal part number (that is, a communication message between the unique device 30A and the main controller 50E). Further, the communication control unit 402 controls the communication messages from all the line termination units 401 while receiving the communication regulation release request.

As a method of determining the "allowable communication load of the communication line used by the transmission source apparatus" handled in the above-mentioned communication control, for example, there is a method shown in FIG. In the figure, a plurality of terminals 10a, 10b, 1 are connected to a unique device 30A connected to the main control device 50E via a communication line 80.
0c is accommodated, and the terminals 10a, 10
The perceived delay when an attempt is made to make or receive a call, transfer, etc. between b and 10c is measured, and from the measurement results, the maximum communication load for the delay allowed as a telephone is determined by the allowable load of the communication line 80. Is to be selected.

FIG. 15 is a diagram showing an embodiment of a communication control system according to the third invention. This communication control system is a typical example of a system that controls the connection between the main control device and the auxiliary control device that are operating as the active system among the main control devices that are multiplexed, and Private branch exchange (PBX) 100 (a,
b) and a call charge accounting information management device (hereinafter referred to as a charging device) 200 as the auxiliary control device are connected by a LAN of Ethernet 85. In this communication control system, the PBX 100 (a, b) corresponds to the main control device 50 in the basic system in FIG. 29, and the charging device 200 is the external device 7 in the basic system.
Equivalent to 0.

The basic operation of this system is PBX1
The information such as the call time for each line is transferred from 00 (a, b) to the billing device 200, and the billing device 200 collects / manages the telephone charge information (billing information) based on the information, and collects the billing information. Transfer to the PBX 100 (a, b) at any time.

FIG. 16 shows the PBX100 of this system.
FIG. 3 is a detailed configuration diagram of (a, b), which includes a CPU 110, an interface unit 111, an operating state control unit 112, a start control unit 113, a stop control unit 114, a received signal analysis unit 115, a main processing unit 116, a connection monitoring unit 117, The fault processing unit 118, the maintenance command processing unit 119, and the CPU load detection unit 120 are provided.

The interface section 111 includes a connection accepting section 1111, a connection releasing section 1112, a receiving section 1113, a transmitting section 1114, and a network load detecting section 1.
The connection monitoring unit 117 includes a basic time interval holding unit 1171, a fluctuation time calculation unit 1172, a time interval calculation unit 1173, a transmission time timer 1174, a diagnostic signal transmission unit 1175, and a reception time timer 1176. .

The CPU 110 is a main processor that controls the entire PBX 100. The interface unit 111 has a connection / communication function for the Ethernet 85. In the interface unit 111, the connection acceptance unit 1111 has a function of waiting for a connection by the TCP / IP protocol from the charging apparatus 200 via the Ethernet 85 and accepting the connection. The connection releasing unit 1112 has a function of releasing the connection with the charging device 200. Receiver 1113
The transmitting unit 1114 has a function of transmitting and receiving various information to and from the charging device 200 via the Ethernet 85.
The network load detection unit 1115 uses the Ethernet 85
The network load is detected based on the number of collisions of the upper frames.

The operating status control unit 112 judges whether the own PBX is in the operating system status or the standby system status, and based on the result of the judgment, the activation control unit 113 or the stop control unit 114 causes the connection reception unit 1111 to operate. Controls activation or deactivation.

The main processing section 116 includes a receiving section 1113,
Billing device 20 arrived via received signal analysis unit 115
The control signal from 0 is received and the process as PBX is performed, while the signal is sent to the charging device 200 via the transmission unit 1114.

The connection monitoring unit 117 is connected to the charging device 2
The diagnostic signal is transmitted to 00, and the presence or absence of the diagnostic response signal received from the billing device 200 for the diagnostic signal within a fixed time is monitored. The fault processing unit 118 detects whether or not a fault has occurred depending on the presence or absence of the diagnostic response signal, and when a fault is detected, controls the operation of the PBX or the like. The maintenance command processing unit 119 provides the connection monitoring unit 117 with basic time information for determining the transmission interval of the diagnostic signal based on the control signal from the external maintenance terminal. The CPU load detection unit 120 detects the usage rate of the CPU 110 per unit time as a CPU load and variably controls the reception monitoring time of the diagnostic response signal (one parameter is the network load detection unit 1115). (Network load given by the above) to the connection monitoring unit 117.

FIG. 17 is a detailed block diagram of the charging device 200 of the present system, which includes the CPU 220 and the interface section 2.
21, a reception signal analysis unit 222, a main processing unit 223, an active system selection unit 224, a connection monitoring unit 225, and a failure processing unit 226. Interface section 2
21 includes a connection requesting unit 2211, a connection release detecting unit 2212, a receiving unit 2213, and a transmitting unit 2214. The connection monitoring unit 225 includes an interval time reading unit 2251, a monitoring timer 2252, and a diagnostic response sending unit 2253. It is equipped and configured.

The CPU 220 is a main processor that controls the entire charging device 200. The interface unit 221 has a connection / communication function for the Ethernet 85. In the interface unit 221, the connection request unit 2211 performs control for requesting establishment of a TCP / IP connection to the active PBX 100 selected by the active system selection unit 224. The connection release detector 2212 detects whether or not the connection with the active PBX 100 has been released. Receiver 2
A transmission unit 213 and a transmission unit 2214 have a function of transmitting and receiving various information to and from the PBX 100 via the Ethernet 85.

The main processing section 223 has a receiving section 2213,
PBX 100 arrived via the received signal analysis unit 222
Receives a control signal from the PBX 100, performs processing as a billing device, and sends a signal to the PBX 100 via the transmission unit 2214.

The active system selecting section 224 selects the active PBX 100 based on the address information stored in the address information table 2241. Connection monitor 225
Monitors the connection status with the connected active PBX 100. Specifically, the diagnostic signal from the PBX 100 is received, and the diagnostic response signal to the diagnostic signal is sent to the PBX.
While transmitting 100, a monitoring timer for determining the next reception timing is set based on the diagnostic signal transmission period information included in the diagnostic signal. The failure processing unit 226
Before the time-out of the monitoring timer, it is detected whether or not a failure has occurred depending on whether or not the next diagnostic signal has been received, and when the failure occurs, the active system selecting unit 224 is switched to the active system PBX 100. Notify you to do.

Hereinafter, the charging device 200 in this system will be described.
The connection control between the active PBX 100 and the active PBX 100 will be described.
First, a method for connecting to the PBX 100 operating as the active system after the charging device 200 starts operating will be described.

First, the charging device 200 includes the active system selecting section 2
Start 24. The active system selector 224 has two P
It has an address information table 2241 holding the IP address of each of the BXs 100a and 100b.
Any one of the IP addresses is extracted from 241 and notified to the connection requesting unit 2211 to activate the operation of the connection requesting unit 2211. As a result, the connection request unit 2211 receives the PB according to the IP address.
Request establishment of a TCP / IP connection to one of the corresponding PBXs of the Xs 100a and 100b.

On the other hand, in the PBXs 100a and 100b, the operating state control unit 112 determines whether the own PBX is the active system or the standby system, and if it is the active system, the activation control unit 113 is activated. The connection accepting unit 1111 is activated by using the connection accepting unit 1111. If the connection accepting unit 1111 is in the standby state, the connection accepting unit 1111 is not activated and the standby state is maintained.

The charging device 200 and the PBX 100a,
According to the control of 100b, when the charging apparatus 200 first makes a connection request to the active system, for example, the PBX 100a, the connection request is accepted by the already-activated connection accepting unit 1111 of the active system PBX 100a. And the current PB
The X100a and the charging device 200 are connected to each other and communication is possible.

On the other hand, when the charging apparatus 200 first makes a connection request to the standby system, for example, the PBX 100b, the connection accepting unit 1 in the standby system PBX 100b.
Since 111 is not activated, the connection request is not accepted and communication cannot be performed. in this way,
If the connection request to one PBX 100b is not accepted, then the active system selection unit 224 of the charging apparatus 200 requests the other PBX 100a for a connection.

As described above, in the charging device 200, which PBX is currently used by repeating the transmission of the connection request based on the selection by the active system selection section 224 until the connection with either PBX is confirmed. Even if it is a system, the charging device 200 and the active system PBX 100 can be connected.

Next, the active PB for the charging device 200
The switching connection control of the X100 is performed as follows. That is, when the two PBXs 100a and 100b switch the states of the active system and the standby system, the charging device 200 changes from the previous active system PBX 100a to the new active system PBX1.
A method of switching the connection to 00b will be described.

When the active PBX 100a shifts to the standby state, the operating state control unit 112 uses the stop control unit 114 to stop the connection receiving unit 1111. Next, the operation state control unit 112 uses the connection release unit 11
12 is started, and the TCP / IP connection with the already connected accounting device 200 is released. On the other hand, the standby system P
When the BX 100b shifts to the active system state, the operational state control unit 112 activates the connection reception unit 1111 via the activation control unit 113.

On the other hand, in the charging device 200, when the previous active PBX 100a becomes the standby system and releases the connection as described above, the connection release detector 2212 detects this release state, and the active system selector 224. To start. Next, the active system selecting unit 224 makes full use of the same control function as in the above-mentioned "active system PBX connection to the charging device 200", and the PBX 100 newly switched to the active system.
Connect to b.

As described above, in the charging device 200,
When switching the operating state of the PBXs 100a and 100b, the connection can be switched from the existing active PBX 100a to the new active PBX 100b by detecting the connection release state associated with this switching.

Next, the PBXs 100a and 100b and the billing device 20 for coping with a failure occurring in this system.
The connection monitoring control between 0s will be described. PBX1
In 00a and 100b, for example, the basic time interval holding unit 1171 in the connection monitoring unit 117 stores the information indicating the diagnostic signal time interval input from the external maintenance terminal through the maintenance command processing unit 119. Further, in the connection monitoring unit 117, the variable time calculation unit 11
The numeral 72 is a C digitized by the CPU load detection unit 120.
The load of PU is input. Furthermore, this fluctuation time calculation unit 1
A network load detected from the number of collisions of frames on the Ethernet 85 and the like is digitized and input to 172 from the network load detection unit 1115.

Here, the fluctuation time calculation unit 1172 calculates a fluctuation time for appropriately changing the basic time interval held by the holding unit 1171. That is, the fluctuation time calculation unit 1172, as shown in FIG.
It has a fluctuation time calculation table 1172a in which fluctuation times corresponding to the CPU load and the load value of the network are described. Using this table, fluctuation time corresponding to the CPU load and the network load value is calculated, and this is calculated. It is sent to the time interval calculation unit 1173.

The time interval calculation unit 1173 calculates new time interval information in consideration of the basic time interval information and the fluctuation time information output from the basic time interval holding unit 1171 and the fluctuation time calculation unit 1172, and calculates the new time interval information. The information is set in the transmission time timer 1174 as the transmission time interval information of the diagnostic signal described later.

After that, the transmission time timer 1174 causes the time interval calculation unit 1 to change every time the set time interval elapses.
173, diagnostic signal transmitter 1175, reception time timer 11
Start 76. The time interval calculation unit 1173 recalculates the time interval at the time point each time the system is activated, and notifies the diagnostic signal transmission unit 1175 of this time interval. Diagnostic signal transmitter 1
175 generates a diagnostic signal carrying diagnostic time interval information for each time interval that has received the above notification, and transmits this to the transmitting unit 111.
4 to the charging device 200. The reception time timer 1176 holds preset predetermined time information, and monitors whether or not the diagnostic response signal from the billing device 200 for the diagnostic signal is returned during the predetermined time. ing.

On the other hand, in the billing device 200, the receiving unit 2213 of the interface unit 221 receives the diagnostic signal. This received signal is analyzed by the received signal analysis unit 222, and is input to the interval time reading unit 2251 and the diagnostic response sending unit 2253 of the connection monitoring unit 225 according to the analysis result that it is a diagnostic signal.

The interval time reading unit 2251 reads the interval time loaded in the input diagnostic signal and sets it in the monitoring timer 2252. In addition, the diagnostic response sending unit 2
Upon receiving the input of the diagnostic signal, the 253 generates a diagnostic response signal indicating a response to this diagnostic signal, and sends this to the PBX 100 via the transmission unit 2214.

In the PBX 100, after the diagnostic response signal is received by the receiving unit 1113, the received signal analyzing unit 11
5, the diagnostic response signal is analyzed and transferred to the connection monitoring unit 117. Connection monitoring unit 1
In 17, the diagnostic response signal is received by the reception time timer 1176.
By inputting into, the reception time information set in the reception time timer 1176 is cleared.

As described above, in this system, the PBX10
From 0, a diagnostic signal is transmitted to the billing device 200, and a diagnostic response signal from the billing device 200 to this diagnostic signal is monitored to monitor the occurrence of a failure, and at the same time, the transmission interval of the diagnostic signal can be variably controlled. Is configured as follows.

Here, the method of determining the fluctuation time of the time interval of the diagnostic signal will be summarized again. PBX10
0, the CPU load detection unit 120 determines that the CPU 110
The utilization rate in the unit time is converted into a numerical value as the CPU load and output to the variable time calculation unit 1172. Also, in the interface unit 111, the network load detection unit 1115
Outputs the number of signal collisions on the Ethernet 85 per unit time to the variable time calculation unit 1172 as the communication load.

As shown in FIG. 18, the fluctuation time calculation unit 1172 has a conversion table 1172a in which corresponding fluctuation times t1 to tn from the CPU loads A1 to An and the communication loads B1 to Bn are recorded in association with each other. CP input from the detection unit 120 and the network load detection unit 1115
The table 1172a based on the U load and the communication load
The fluctuation time is sequentially determined using the data in the above, and the fluctuation time is output to the time interval calculation unit 1173.

By the variation control of the diagnostic signal time interval, the PBX 100 and the billing device 200 are connected to each other as shown in FIG.
A control sequence as shown in is established. That is,
The transmission interval of the diagnostic signal from the PBX 100 to the billing apparatus 200 is sequentially changed in the order of ΔS1 seconds, ΔS2 seconds, ΔS3 seconds, ΔS4 seconds in accordance with the above-mentioned CPU load and network load value. Further, the time interval from the receipt of each diagnostic signal by the charging device 200 to the return of the diagnostic response signal, that is, the abnormality occurrence monitoring period in the PBX 100 is set to a fixed value (Δt seconds).

Here, consider a case where the interface section 111 of the active PBX 100a has a function stop due to a failure in transmission / reception with the Ethernet 85. In this case, in the PBX 100a, the reception time timer 117
6 times out, and as a result, the failure processing unit 118 is notified of the failure occurrence. Then, the failure processing unit 1
18 takes measures such as instructing the main processing unit 116 to suppress the function of sending the billing information to the billing apparatus 200.

In this system, if the active PBX 100a stops functioning due to a failure as described above, it is assumed that the standby PBX 100b up to that point is set up so as to become the active PBX. Under such a premise, the previous active PBX 100a loses the function of transmitting a diagnostic signal, so that in the charging device 200, the monitoring timer 2252 times out and notifies the fault processing unit 226 of the fault occurrence. Then, the failure processing unit 2
26 activates the active system selection unit 224. The activated active system selection unit 224 performs control to reconnect to the PBX 100b newly switched to the active system by making full use of the same control function as the above-mentioned "active system PBX connection to the charging device 200".

As described above, according to the present invention, the PBX of the current system is used.
When 100 fails due to a failure, a standby PBX 100 is newly started up, and the billing device 200 supports a control function for reconnecting with the newly started up PBX 100, and a communication error occurs. You can deal with it quickly.

In this system, the charging device 20
The connection switching method to the active PBX 100 on the 0 side is not limited to the above-mentioned method, and the following method can be adopted. That is, the charging device 200
In the active system selection unit 224, both PBX100
The connection request is repeated until the connection with a and 100b is completed. On the other hand, in PBX100a, 100b,
In the operating state control unit 112, the connection acceptance unit 1111 is activated regardless of whether the connection request source is the active system or the standby system. The connection accepting unit 1111 is the charging device 200.
When accepting a connection from the operation status control unit 1
A report to that effect is output to 12. Operation status control unit 112
On the basis of the above report, sends an operation status notification signal carrying the status information of the active system / standby system to the charging apparatus 200 through the transmission unit 1114.

On the other hand, in the charging device 200, the operation status notification signal is transferred to the active system selecting section 224 through the receiving section 2213 and the received signal analyzing section 222. Active system selection unit 22
Reference numeral 4 reads the status information of the active / standby system contained in the operational status notification signal, identifies the PBX of the active system and makes a selection, and the main processing unit 22
Notify 3.

As described above, according to the third aspect of the invention, the main control device operating as the active system and the auxiliary control device among the main control devices of a plurality of units are connected to each other. The control device can be configured to be individually connected to the Ethernet. Therefore, it suffices to prepare a general hardware configuration required for the main control unit, and use special hardware that hides the configuration in which multiple main control units exist from the auxiliary control unit. There is no need to do it. Further, since the diagnostic signal is transmitted at a time interval, the communication abnormality can be quickly detected by constantly checking the normality of the communication between the main control device and the auxiliary control device. In addition, the time interval information is added to the diagnostic signal and notified to the other party each time, so that the time interval can be dynamically determined according to the load of the CPU and communication, and communication with less load on system operation is possible. Monitoring can be realized.

FIG. 20 is a diagram showing an embodiment of the exchange system according to the fourth invention. This exchange system
A plurality of line / trunk devices 36 (conveniently discriminated by symbols 1 to n) accommodating the communication terminal 10, the public line 12, a private line, and the like, and control of a communication path between these line / trunk devices 36 An exchange-specific device 30B having a time switch 35, a control section 37 for controlling the entire device including the time switch 35 and the line / trunk device 36, and an exchange process is performed by a signal from the exchange-specific device 30B. Based on the processing result, the main controller 50 which sends the instruction signal to the time switch 35 and the line / trunk device 36 to the exchange-specific device 30B.
F is connected by a communication line 80. In this exchange system, main controller 50F corresponds to main controller 50 in the basic system shown in FIG. 29, and exchange-specific device 30B includes exchange-specific device 30 and line / trunk device 12 in the same basic system. It corresponds to the part.

In the exchange-specific device 30B, the control unit 3
As shown in FIG. 21, 7 includes a communication control unit 371, a communication path control unit 372, a call restriction port number management unit 373, and a call restriction target port number management unit 374.

The transmission restriction port number management unit 373 is shown in FIG.
The transmission restriction port management table having the contents as shown in 2 (a) is held, and the transmission restriction non-port number management unit 374 is held.
Holds a transmission restriction non-target port management table having the content as shown in FIG. As can be seen from these figures, each of the above tables manages the target port number for each congestion level. Congestion levels are as follows: congestion level 3, congestion level 3
It is defined as 2, 1.

In this system, the call request signal from the terminal 10 is sent from the exchange specific device 30B to the main controller 50F through the communication line 80. Upon receiving the call request signal, main controller 50F sends a switch control request signal through communication line 80 to time switch 35.
Is sent to The time switch 35 sets the path between the terminal 10 and the PDT tone according to the switch control request signal. Further, the main controller 50F and the exchange specific device 30B monitor the communication load of the communication line 80, and transition to the congestion state when the communication load exceeds a predetermined level. In this congestion state, the exchange specific device 30B performs congestion control using the above-mentioned outgoing call restriction port management table and outgoing call restriction target port management table. The outline of this congestion control is as follows.

That is, as described above, main controller 50F
And the exchange-specific device 30B monitor the communication load of the communication line 80 connecting them, and when the communication load exceeds a predetermined level, the main controller 50F
And, after the congestion level information is set in the exchange-specific device 30B, when the exchange-specific device 30 receives a call request signal from the terminal 10, the exchange-specific device 30B stores the call in the restricted port management table managed by itself. It is determined whether the port number of the terminal is registered.

Here, when the port number of the terminal is registered, the transmission request signal from the terminal is discarded. If the port number is not registered, it is determined whether or not the port number is registered in the outgoing call restriction target port management table. Here, if the registration is confirmed, a call request signal is sent to main controller 50F through communication line 80. If it is not registered in any of the above tables, the port number is registered in the transmission restriction port management table and a transmission request signal is sent to main controller 50F. The main controller 50F determines whether or not there is a call restriction of the terminal 10 based on the port number information in the call request signal, and when the call is restricted, the call request signal is discarded. Further, when the transmission restriction is not performed, a control signal is sent to the time switch 35 of the exchange specific device 30B.

On the other hand, in the exchange specific device 30B, when the port number information is extracted from the above control signal from the main control device 50F to the time switch 35 and the port number is registered in the transmission restriction target port management table, ,
The port number is deleted from the table, and the port number is registered in the out-going restriction port management table. Further, when the communication load of the communication line 80 connecting the exchange specific device 30B and the main control device 50F is lower than a predetermined level, the congestion level information managed by each device and the transmission managed by the exchange specific device 30B. Initializes the restricted port management table and the outgoing restricted port management table.

Details of the congestion control of this system will be described below with reference to the flowchart shown in FIG.
As described above, when the call request signal is transmitted from the terminal 10 (step 350) and the call request signal is received by the exchange specific device 30B via the line / trunk device 36 (step 351) (step 352). The control unit 37 of the exchange-specific device 30B first determines whether or not it is in a congestion state (step 353). Here, when it is not in the congestion state (NO in step 353), the control unit 37 performs the above-described normal calling process.

On the other hand, in the case of congestion (step 35)
3), the control unit 37 determines whether or not the port number of the terminal 10 that has made the call request is registered in the transmission restriction port management table managed by the transmission restriction port number management unit 373 of the exchange-specific device 30B ( Step 35
4). Here, when the port number is registered (YES in step 354), the call origination restriction is performed by discarding the call request signal from the terminal 10. In contrast,
When the port number is not registered (step 354N
In O), it is determined whether or not the port number of the terminal 10 is registered in the outgoing call restriction non-target port management table managed by the outgoing call restriction non-target port number management unit 374 (step 355).

Here, when the port number is registered (YES in step 355), the control unit 37 sends the call request signal to the main control unit 50F through the communication line 80 without restricting the outgoing call. Perform normal call processing. On the other hand, when the port number is not registered (NO in step 355), the port number of the terminal 10 is registered in the outgoing call restriction port management table (step 356), and the call request signal is transmitted through the communication line 80. It is sent to the controller 50F (step 357). When main controller 50F receives the call request signal through communication line 80 (step 358), it first determines whether or not it is in a congestion state (step 359). Here, if it is not in the congestion state (NO in step 359), normal calling processing is performed.

On the other hand, in the case of congestion (step 35)
9YES), and then main controller 50F extracts the port number information from the received call request signal and determines whether or not the terminal 10 is a call restriction terminal (step 360). If the terminal 10 is a call restriction terminal (YES at step 360), the call restriction is performed by discarding the received call request signal. On the other hand, when the calling terminal 10 is not the call restriction terminal (step 360 NO), the main controller 50F determines that the communication line 80
A switch control request signal is sent to the exchange-specific device 30B through (step 361).

Upon receipt of the switch control request signal (step 362), the exchange specific device 30B extracts information on the port number from the switch control request signal, and confirms whether the port number is registered in the outgoing call regulation port management table. The determination is made (step 363). If the port number is registered (step 3)
63 YES), the control unit 37 deletes this port number from the outgoing call restriction port management table and registers the port number in the outgoing call restriction target port management table (step 364). A switch control request signal is sent (step 365). If the port number is not registered in the outgoing call restriction port management table (step 363).
NO), the switch control request signal is immediately sent to the time switch 35. When the time switch 35 receives the switch control request signal (step 366), the line / trunk device 3 corresponding to the calling terminal 10 is received.
Switching control is performed to listen to PDT through 6 (step 367).

Next, a more specific operation of the above congestion control will be described in detail with reference to the transmission restriction port management table in FIG. 22A and the transmission restriction non-target port management table in FIG. 22B. In the situation where the contents of each of these tables show the values shown in the above figures, and when the congestion level is 1, and there is a call request from the terminal 10 with the port number "000001", the exchange specific device 30
In B, since the port number is registered in the outgoing call restriction target port management table, the outgoing call restriction signal is not sent and the call request signal is sent to main controller 50F. Next, when the call load is requested from the terminal 10 with the port number "000001" when the communication load further increases and the congestion level reaches 2, the exchange-specific device 30B manages the port number as the outgoing call control port. Since it is registered in the table, the received call request signal is discarded and transmission control is performed.

When a call request is issued from the terminal 10 having the port number "000004" in the congestion level 2, the exchange-specific device 30B determines that the port number is not subject to the call regulation port management table and the call regulation target. Since the port number is not registered in either of the port management tables, the port number is registered in the outgoing call regulation port management table and the call request signal from the terminal 10 is sent to the main control unit 50F through the communication line 80.

Main controller 50F extracts the port number "000004" from the received call request signal and determines whether or not to restrict the call. When the call control is performed, the received call request signal is discarded, and when the call control is not performed, the switch control request signal is transmitted to the exchange specific device 30B. In the exchange-specific device 30B, the main controller 50F
The port number information is extracted from the switch control request signal received from the port control unit, the port number is deleted from the outgoing call regulation port management table, and is registered in the outgoing call regulation target port management table.

Further, when the communication load decreases and the congestion level falls below the congestion level 1, the congestion state is released, and the outgoing call restricted port number management unit 373 and the outgoing call restricted port number of the exchange unique device 30B are released. Management unit 374
Initialize the outgoing restricted port management table and the outgoing restricted port management table that are respectively managed by.

As described above, according to the fourth aspect of the present invention, by determining whether or not the outgoing call restriction is performed by the exchange specific device 30B, the invalid signal generated when the user of the terminal 10 takes the off-hook of the handset or the like. It can be eliminated before the main control device 50F accepts it, it is possible to prevent the load of the communication line 80 from increasing due to the invalid signal, and it is possible to realize congestion control that can recover from the congestion state early.

FIG. 24 is a diagram showing an embodiment of the exchange system according to the fifth invention. This exchange system
The exchange 130 and the external device 300 are connected by a communication line 80. In this exchange system, the external device 300 corresponds to the external device 70 in the basic system in FIG. 29, and the exchange 130 corresponds to the component part including the exchange specific device 30 and the main control device 50 in the basic system.

The exchange 130 has an operating system 160, an exchange processing section 150 which operates as a task on the operating system 160, and a communication control section 1.
40.

The operating system 160 has a queue 160a used when the above tasks communicate with each other.
It has. When the communication control unit 140 and the exchange processing unit 150 communicate with each other, one of the two, which is the transmitting side, connects the packet, which is the unit of communication, to the queue 160a, and the one which is the receiving side is the above. Communication is performed by sequentially extracting the packets connected to the queue 160a.

The exchange processing section 150 performs the exchange processing based on the processing request sent from the external device 300. Particularly, in the present system, the request number notifying means 1
51 are provided. The request number notifying means 151, when taking out a processing request connected to the queue 160a and performing the processing, sends the request number of the processing request to the communication control unit 1.
It has a function of notifying 40.

The communication control section 140 receives the processing request sent from the external device 300 through the communication line 80 and transfers it to the exchange processing section 150.
In particular, in this system, the reception request number storage area 1
41, a processed request number storage area 142, a request number storage unit 143, an unprocessed request number estimation unit 144, and an external device output restriction unit 145.

The reception request number storage area 141 is an area for storing the request number of the received processing request.
The processed request number storage area 142 is an area for storing the request number notified from the request number notification means 151 of the exchange processing unit 150. Request number storage means 143
Has a function of storing the request number in the reception request number storage area 141 when the processing request received from the external device 300 through the communication line 80 is transferred to the exchange processing unit 150. The unprocessed request number estimation means 144 accumulates in the queue 160a by comparing the request number stored in the reception request number storage area 141 with the request number stored in the processed request number storage area 142. It has a function to estimate the number of processing requests. The external device output regulation unit 145 has a function of sending a request output stop request to the external device 300 to stop the output of the processing request to the exchange 130. On the other hand, the external device 300 is
A request number assigning means 310 is provided for assigning a number to each processing request sent to the exchange 130.

The exchange control operation in this exchange system will be described in detail below with reference to the conceptual diagram of FIG. A plurality of ◯ marks disclosed in the queue 160a in the figure each represent one processing request, and the value described immediately to the right of each processing request represents each request number.

First, consider a case where the external device 300 continuously sends four processing requests to the exchange 130. At this time, a request number is assigned to each of the transmitted processing requests by the request number assigning means 310 of the external device 300. Here, "1" in the order of transmission,
It is assumed that request numbers “2”, “3”, and “4” are given. These four processing requests are issued to the exchange 1 respectively.
When it is received by the communication control unit 140 of 30 and is transferred to the exchange processing unit 150, it is connected to the queue 160a. On the other hand, the exchange processing unit 150 sequentially takes out the processing requests connected to the queue 160a, and performs processing based on the taken-out processing requests.

Now, as shown in FIG. 25, the communication control unit 14
It is assumed that when 0 connects the processing request with the request number “4” to the queue 160a, the exchange processing unit 150 has taken out the processing request with the request number “1” from the queue 160a and processing it. At this time, in the reception request number storage area 141, the request number “4”, which is the request number of the last processing request connected to the queue 160 a, is stored by the request number storage means 143. On the other hand, in the processed request number storage area 142, the request number notifying unit 151 of the exchange processing unit 150 notifies and stores “1” which is the request number of the processing request being processed by the exchange processing unit 150. ing.

Therefore, at this time, the unprocessed request number estimation means 1
At 44, the request number “4” stored in the reception request number storage area 141 and the processed request number storage area 1 are displayed.
By comparing with the request number “1” stored in 42, it can be estimated that the number of processing requests connected to the queue 160a is 3 (4-1 = 3).

The external device output regulation means 145 constantly monitors the estimation result of the unprocessed request number estimation means 144. Then, based on the estimation result, the number of processing requests staying in the queue 160a is grasped, and when the number of staying processing requests exceeds a certain number, a request output stop request is sent to the external device 300. Is sent. On the other hand, the external device 300
When the request output stop request is received through the communication line 80, thereafter, the response operation for stopping the output of the processing request to the exchange 130 is performed.

As described above, in this system, the exchange 13
0, the number of processing requests connected to the queue 160a is estimated each time a processing request is received from the external device 300 or each time the processed request number is notified from the exchange processing unit 150, and When the estimated number of processing requests in the queue exceeds a certain value, the external device output restricting unit 145 sends a request output stop request to the external device 300 to stop the output of the processing request to the exchange 130. The queue 160
It is possible to prevent a situation in which a is overflowed and the processing request is discarded, so that desired processing cannot be unfairly performed.

Next, another embodiment of the fifth invention will be described. FIG. 26 is a diagram showing another embodiment of the exchange system according to the fifth aspect of the invention, and one exchange 130
A, a plurality of external devices 300a, 300b, 300
c are connected by a communication line 80. This exchange system includes a plurality of external devices 300a, 300b,
It is intended to accept and process processing requests from each of these devices for 300c, and is realized by the following configuration that is partially different from the exchange system in FIG. 25 that accepts and processes only processing requests from one external device 300. It

First, the exchange 130A includes the operating system 160 and the operating system 16
0 is composed of an exchange processing unit 150 and a communication control unit 140A that operate as tasks. The operating system 160 has a queue 160a used when the above tasks communicate with each other. Communication control unit 140
When A and the exchange processing unit 150 communicate with each other, the packet of which the sender is the communication unit is connected to the queue 160a, and the receiver is the queue 160a. Communication is performed by sequentially extracting packets connected to.

The exchange processing section 150 has the above-mentioned external devices 30.
0a, 300b, 300c performs exchange processing based on the processing request transmitted, and the request number notifying means 1
51 are provided. The request number notifying means 151, when taking out a processing request connected to the queue 160a and performing the processing, sends the request number of the processing request to the communication control unit 1.
It has a function of notifying to 40A.

The communication control section 140A first determines the external device 3
00a, 300b and 300c, respectively, and reception request number storage areas 141a, 141b and 141c and processed request number storage areas 142a, 142b and 142c. Reception request number storage areas 141a, 141
b, 141c are corresponding external devices 300a, 300
b, 300c is an area for storing the request number of the processing request received, and the processed request number storage area 14
Reference numerals 2a, 142b, 142c are areas for storing the request number notified from the request number notifying unit 151 of the exchange processing unit 150.

The communication control section 140A further comprises a request number storage means 143A, an unprocessed request number estimation means 144A, and an external device output regulation means 145A. The request number storage means 143A includes external devices 300a, 300b, 300.
When the processing request received from the communication line c via the communication line 80 is transferred to the exchange processing unit 150, the request number of the processing request is stored in the reception request number storage areas 141a, 141b corresponding to the external devices 300a, 300b, 300c of the transmission source. 141c
Each has a function to store.

The unprocessed request number estimation means 144A, for each of the external devices 300a, 300b, 300c, the request number and processed request number storage area 142 stored in the reception request number storage areas 141a, 141b, 141c.
It has a function of estimating the number of processing requests accumulated in the queue 160a by comparing with the request numbers stored in a, 142b, 142c. The external device output regulating means 145A is provided with the external devices 300a, 300 described above.
It has a function of sending a request output stop request to a specific device of b and 300c to stop the output of the processing request to the exchange 130A.

On the other hand, the external devices 300a, 300b, 30
0c is request number assigning means 310a, 310 for assigning a number to each processing request sent to the exchange 130A.
b and 310c respectively. In particular, each of these request number assigning means 310a, 310b, 310c sends a processing request to the external device 300a, 300b, 300.
It has a function of assigning a request number to the processing request so that it can be discriminated from which of c is transmitted. In this example, the processing request sent by the external device 300a includes “A
The request numbers "1" and "A2" are assigned to the external device 30.
Numbers such as "B1" and "B2" are assigned to the processing request sent by 0b, and request numbers "C1" and "C2" are assigned to the processing request sent by the external device 300c. The identification of the external device of the transmission source is realized by adding a code corresponding to the external device name before the.

The exchange control operation in this exchange system will be described in detail below with reference to the conceptual diagram of FIG. A plurality of ◯ marks disclosed in the queue 160a in the figure respectively represent one processing request, and the codes and numerical values just to the right of each processing request respectively indicate the transmission source and the request number of the processing request. It represents.

Now, as shown in FIG. 27, in the exchange 130A, the communication controller 140A queues the processing request of the request number "A7" received from the external device 300a in the queue 160a.
When connected to the external device 300,
Consider a situation where the processing request of the request signal “B1” received from b is fetched from the queue 160a and processed. At this time, the reception request number storage area 141a corresponding to the external device 300a stores the value "A7" which is the request number of the processing request last connected to the queue 160a. At that time, the values “B2” and “C3”, which are the numbers of the processing requests from the external devices 300b and 300c, are stored in the reception request number storage areas 141b and 141c corresponding to the external devices 300b and 300c, respectively. It has been done.

On the other hand, from the exchange processing unit 150, the request number notifying means 151 of the exchange processing unit 150 notifies the request number "B1" of the processing request being processed by the exchange processing unit 150, It is stored in the processed request number storage area 142b corresponding to the external device 300b,
Similarly, consider a situation where the processed request number storage areas 142a and 142c corresponding to the external devices 300a and 300c store the values "A5" and "C2", respectively.

FIG. 28 shows the storage contents of the reception request number storage areas 141a, 141b, 141c and the processed request number storage areas 142a, 142b, 142c corresponding to the external devices 300a, 300b, 300c under the above-mentioned circumstances. Shows.

In this case, the unprocessed request number estimating means 144A
Then, the reception request number storage areas 141a, 141b, 14
1c, the numerical portions of the request numbers and the processed request number storage areas 142a, 142a,
By comparing the numbers of request numbers stored in 142b and 142c with each other, the number of processing requests connected to the queue 160a is 2 (7-5 = 2) for the external device 300a. 1 for device 300b
(2-1 = 1), 1 (3 for the external device 300c)
It can be estimated that there are a total of four, which is -2 = 1).

The external device output regulation means 145A constantly monitors the estimation result of the unprocessed request number estimation means 144A. Then, based on the estimation result, the number of processing requests staying in the queue 160a is grasped, and when the number of staying processing requests exceeds a fixed number for each of the external devices 300a, 300b, 300c. , These external devices 300
A request output stop request is sent to a, 300b, and 300c. On the other hand, the external devices 300a, 300b, 3
In 00c, when the request output stop request is received through the communication line 80, a response operation is performed thereafter to stop the output of the processing request to the exchange 130A.

Thus, in this system, the exchange 13
At 0A, external devices 300a, 300b, 300c
Every time a processing request is received from the exchange processing unit 15
Each time the request number is notified from 0, the external devices 300a, 300b, 300 connected to the queue 160a are connected.
If the number of processing requests in the queue estimated for each of the external devices 300a, 300b, and 300c exceeds a certain value, the external device is estimated. The output control unit 145A sends a request output stop request to the corresponding external device 300 to stop the output of the processing request to the exchange 130A, so that the queue 160a overflows and the processing request is discarded. It is possible to prevent a situation in which desired processing cannot be unreasonably performed.

The external devices 300a, 300b,
Regarding the method of restricting the transmission of processing requests from 300c,
As described above, when the processing request for each of the external devices 300a, 300b, 300c exceeds a certain value, the sending of the processing request is stopped for each corresponding external device 300a, 300b, 300c Request number estimation means 1
When the total number of processing requests in the queue estimated by 44A exceeds a certain value, a request output stop request is sent to the external device 300 having the largest number of processing elements in the queue, and the request is sent to the exchange. The output of the processing request may be stopped.

[0191]

As described above, according to the first aspect of the present invention, the main control unit records the number of communication messages transmitted and received between the communication control unit and a plurality of auxiliary control units and the communication message length. At the same time, the load of the communication line related to each communication is recognized based on this recording result, and the communication control device or the communication between the plurality of auxiliary control devices is controlled according to the load, so that the capacity of the communication line is exceeded. If you do not have the function to measure the usage of the communication line in the environment that builds a communication system on a general-purpose OS, the above restrictions are applied while discarding communication messages and communication. The processing can be performed within a predetermined time.

According to the second invention, in the communication control device, identification information for identifying various devices connected via the communication line is stored, and a communication message transmitted / received between the various devices is stored. With respect to the message, the source device and the destination device of the message are identified based on the length of the message, and the message length is associated with the source device and the destination device for cumulative management. By grasping the communication load between various devices,
Since the communication control between the various devices is performed according to the communication load, the communication trend of the various devices can be collectively monitored by the communication control device, and the various device having different characteristics can be used by the various device interoperability. It is not necessary to implement a communication control function for cooperatively controlling communication between them. Moreover, by performing communication control between the various devices according to the communication load grasped by the monitoring, as compared with the case where the communication control functions of these various devices are coordinated to perform communication control, It becomes extremely easy to maintain the real-time property required for the exchange processing between the control devices.

According to the third invention, the main control unit accepts the TCP connection only when it becomes the active system, while the auxiliary control unit sets both systems to the main control unit. In response to the request for TCP connection, the active system is selected by communicating with the PBX of the accepted system, or the main controller always uses TCP.
The connection is accepted and the connected auxiliary control device is notified of the discrimination between the active system and the standby system by a signal so that the auxiliary control device selects the active system. Since the means for connecting to the active one of the main control units multiplexed from the above was built, special hardware for hiding the existence of multiple main control units from the auxiliary control unit is not required. And can contribute to simplification of the structure. Further, since a mechanism for detecting an abnormality by monitoring the response from the auxiliary control device to the signal information sent from the main control device is provided together with the above-mentioned active system connecting means, the main control device communicates with the auxiliary control device by TCP. In this case, even when a failure such as disconnection of the network occurs, this failure can be detected within a short time and the recovery can be promptly dealt with.

According to the fourth aspect of the invention, when congestion occurs in the communication line connecting the exchange-specific device and the main control unit, the exchange-specific device side is determined by the service class and the congestion level of the terminal that requested the call. Since it is configured to determine whether or not to restrict outgoing call and send the control signal to the main control device only when outgoing call is not restricted, the use of the terminal itself is restricted and the terminal user's refrain from using the terminal. It is possible to quickly recover from the congestion state without depending on passive elements such as, and it is possible to significantly reduce the situation where the congestion state deteriorates and an emergency call cannot be connected.

Further, according to the fifth invention, the communication control unit of the exchange sets the request number of the received processing request and the request number notified to the communication control unit when the exchange processing unit performs processing. Since the number of processing requests accumulated without being processed and transferred to the exchange processing unit is estimated by comparison, the number of accumulated processing requests is calculated from the communication control unit and the exchange processing unit. Even when using an operating system that cannot be directly known, it becomes possible to recognize the number of accumulated processing requests. Further, when the number of processing requests estimated by the above method exceeds a certain value, it is possible to reduce the frequency with which the exchange receives the processing requests by restricting the output or disconnecting the communication connection to the outside. Therefore, it is possible to prevent the exchange from discarding the processing request because it cannot process the request, and it is possible to contribute to the efficiency and reliability of communication between the exchange and the external device.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a communication control system according to a first invention.

2 is a diagram showing an example of communication line usage information held in a communication line usage information storage unit of the system shown in FIG. 1;

FIG. 3 is a diagram showing an example of registration information of communication line capacity registered in advance used in the system shown in FIG.

FIG. 4 is a diagram showing an example of communication line use information within a fixed time, which is held separately from the communication line use information in FIG.

FIG. 5 is a diagram showing another embodiment of the communication control system according to the first invention.

FIG. 6 is a diagram showing still another embodiment of the communication control system according to the first invention.

7 is a diagram showing an example of communication control priority registration information used in the system shown in FIG.

FIG. 8 is a diagram showing still another embodiment of the communication control system according to the first invention.

9 is a diagram showing an example of communication line configuration information used in the system in FIG.

FIG. 10 is a diagram showing an embodiment of a communication control system according to the second invention.

11 is a diagram showing a detailed configuration of a communication control device of the system in FIG.

12 is a diagram showing an example of formats of a communication message for device information registration and a general communication message used in the system in FIG.

13 is a diagram showing an example of contents of an information table of the communication control device in FIG.

14 is a schematic diagram for explaining a method of determining an allowable communication load of a communication line used by a transmission source device in the system in FIG.

FIG. 15 is a diagram showing an embodiment of a communication control system according to the third invention.

16 is a detailed configuration diagram of a PBX of the system in FIG.

17 is a detailed configuration diagram of a call charge information management device of the system in FIG.

18 is a diagram showing an example of a fluctuation time calculation table in the fluctuation time calculation unit of the PBX in FIG.

19 is a diagram showing an example of a fault diagnosis control sequence of the system in FIG.

FIG. 20 is a diagram showing an embodiment of an exchange system according to a fourth invention.

21 is a functional configuration diagram of a control unit of the exchange-specific device in the system of FIG.

22 is a diagram showing an example of an outgoing call restriction port management table and an outgoing call restriction target port table used in the system of FIG.

23 is a flowchart showing an example of congestion control of the system in FIG.

FIG. 24 is a diagram showing an embodiment of an exchange system according to the fifth invention.

FIG. 25 is a conceptual diagram for explaining a switching control operation of the switching system in FIG.

FIG. 26 is a diagram showing another embodiment of the exchange system according to the fifth invention.

27 is a conceptual diagram for explaining a switching control operation of the switching system in FIG.

28 is a diagram showing an example of stored contents of a reception request number storage area and a processed request number storage area in the communication control unit of the exchange system in FIG. 26.

FIG. 29 is a diagram showing a basic configuration of a general exchange system.

FIG. 30 is a flowchart showing an example of congestion control in a conventional exchange system.

[Explanation of symbols]

10, 11 communication terminal 12 public line 13 dedicated line 20 line / trunk device 30 switch specific device 35 time switch 50 main controller 60 system controller (SYSC) 70 external device 80 communication line 40 communication controller 50A, 50B, 50C, 50D Main control device 501 Communication control device Communication device 502 (a to n) Auxiliary control device Communication device 503 Communication processing device 504 Communication regulation device 505 Communication line usage recording device 506 Communication line usage information storage unit 507 Communication processing resource usage measuring device 508 Communication control priority registration device 509 Communication control priority registration information storage unit 510 Communication line configuration information registration device 511 Communication line configuration information storage unit 75 (a to n) Auxiliary control device 10a, 10b, 10c Terminal 12A Public network 30A Unique Device 40A Communication control device Device 401 Line terminating unit 402 Communication control unit 403 Information table reading / writing unit 404 Information table 405 Communication message translation unit 406 Communication load measuring unit 407 Timer 50E, 50F Main controller 85 Ethernet 100 (a, b) Private branch exchange (PBX) 110 CPU 111 interface unit 1111 connection accepting unit 1112 connection releasing unit 1113 receiving unit 1114 transmitting unit 1115 network load detecting unit 112 operating state control unit 113 startup control unit 114 stop control unit 115 received signal analyzing unit 116 main processing unit 117 connection monitoring unit 1171 basic Time interval holding unit 1172 Fluctuation time calculation unit 1172a Fluctuation time calculation table 1173 Time interval calculation unit 1174 Transmission time timer 1175 Diagnostic signal transmission unit 1176 Reception Time timer 118 Failure processing unit 119 Maintenance command processing unit 120 CPU load detection unit 200 Call charge billing information management device (billing device) 220 CPU 221 Interface unit 2211 Connection request unit 2212 Connection release detection unit 2213 Reception unit 2214 Transmission unit 222 Reception signal Analysis unit 223 Main processing unit 224 Active system selection unit 225 Connection monitoring unit 2251 Interval time reading unit 2252 Monitoring timer 2253 Diagnostic response sending unit 226 Failure processing unit 30B Switch-specific device 35 Time switch 36 Line / trunk device 37 Control unit 371 Communication control Part 372 Call path control part 373 Outgoing restriction port number management part 374 Outgoing restriction target port number management part 130, 130A Switch 140, 140A Communication control part 141, 14 a, 141b, 141c reception request number storage area 142, 142a, 142b, 142c processed request number storage area 143, 143A request number storage means 144, 144A unprocessed request number estimation means 150 exchange processing section 151 request number notification means 160 operating System 160a Queue 300, 300a, 300b, 300c External device 310, 310a, 310b, 310c Request number assigning means

Front Page Continuation (72) Inventor Katsunori Yoshihara, 1-share company at Toshiba Hino Plant, 3-chome, Asahigaoka, Hino-shi, Tokyo (72) Inventor Shingo Nagata 1-share company at 3-chome, Asahigaoka, Hino-shi, Tokyo Toshiba Hino Factory

Claims (24)

[Claims] 1. A communication control device having an interface with a communication terminal, a public network and a leased line, a main control device for controlling the communication control device, information relating to the communication control device and exchange processing in the main control device. In a communication control system in which a plurality of auxiliary control devices to be processed are connected to each other via a communication line, the main control device includes the number of communication messages output to the communication control device and a communication message length, the communication control device. The number of communication messages and communication message length output from each of the auxiliary control devices, the number of communication messages and communication message length output to each of the auxiliary control devices, and the number of communication messages and communication message length output from each of the auxiliary control devices are recorded. Between the recording means and the communication control device and the auxiliary control device recorded by the recording means. Load calculating means for determining the load of the communication line from the number of communication messages transmitted and received and the communication message length; And a control means for controlling communication with each of the devices. 2. The main control device comprises a measuring means for measuring a usage amount of communication processing resources including at least a CPU usage amount and a memory usage amount in the main control device, and the control means is controlled by the measuring means. The communication control system according to claim 1, wherein the communication is controlled according to the measured communication processing resource usage amount. 3. The recording means includes a number of communication messages and a communication message length output from the main control device to the communication control device, a number of communication messages and a communication message length output from the communication control device, and the plurality of communication messages. Number of communication messages and communication message length output to each of the auxiliary control devices, and communication amount within a predetermined time for each of the number of communication messages and communication message length output from each of the plurality of auxiliary control devices A communication time recording means for recording a communication time within a fixed time, and the control means controls the communication line based on the number of communication messages and the communication message length within the predetermined time recorded by the communication traffic recording means within the constant time. 3. The communication is controlled in the order of use or in descending order of the number of communication messages within the certain period of time. Communication control system on board. 4. The main control device comprises a regulation order registration means for registering a communication regulation order with respect to each of the communication control device and the plurality of auxiliary control devices, and the control means comprises the communication control device or the auxiliary device. 4. When performing communication control according to the communication load with the control device, the communication control is performed in accordance with the communication regulation order registered by the regulation order registration means. Communication control system. 5. The main control device comprises a configuration information registration means for registering a communication control device or a plurality of auxiliary control devices that use the same communication path as configuration information, and a plurality of devices registered by the configuration information registration means. A line-corresponding load calculating means for determining, for each communication line, the load of the communication line being used from the number of communication messages transmitted / received to / from the main control device and the communication message length, wherein the control means is the communication line. The communication control system according to any one of claims 1 to 4, wherein the communication is controlled according to a communication load of the communication line for each time. 6. A unique device having an interface with a communication terminal, a public network, and a leased line, a main controller for controlling the unique device, and a plurality of processors for processing information relating to the unique device and exchange processing in the main controller. In the communication control system, wherein the auxiliary control device is connected to the communication control device via a communication line, the communication control device registers identification information for identifying each of the unique device, the main control device, and the auxiliary control device. The identification information registration means and the specific information in the communication message transmitted / received between the respective devices are translated, and the identification information registered in the identification information registration means is referred to, and the transmission source device and the transmission destination of the communication message are transmitted. A communication device identifying means for identifying the device, and a communication message length of a communication message transmitted / received by the device identified by the communication device identifying means Output means, and communication control means for measuring the communication load between the respective devices based on the communication message length calculated by the calculating means, and performing communication control between the respective devices according to the communication load. A communication control system comprising: 7. The communication control means communicates between the specific device and the main control device when a communication line between the communication control device and the specific device or the main control device reaches a predetermined communication load. 7. The communication control system according to claim 6, wherein the communication between the specific device and a device other than the main control device is regulated. 8. The communication control means obtains a communication load for each communication line based on the communication message length calculated by the calculating means, and performs the communication control according to a result of comparison with an allowable load of the communication line. The communication control system according to claim 7, wherein: 9. The communication control means sets a communication load capable of maintaining a real-time property of an exchange process between the specific device and the main control device as an allowable load of the communication line. Communication control system. 10. The registration of the identification information in the identification information registration means is performed when the unique device, the main control device and the auxiliary control device are connected to the communication control device. Communication control system. 11. A communication control system comprising a plurality of multiplexed main control devices connected to an auxiliary control device by a communication line, wherein the main control device transmits a connection control signal to and from the auxiliary control device. Interface means for transmitting and receiving, a starting means for activating the interface means when the own device starts operation as an active system, and a connection acceptance control for returning a connection acceptance signal in response to a connection request signal received through the interface means The auxiliary control device sequentially transmits connection request signals to all the main control devices through the interface means for transmitting and receiving connection control signals to and from the main control device. Connection request control means, the connection request And a working system selecting means for establishing a connection in response to the connection acceptance signal returned from the main control device to the main control device, and selecting a working main control device. A communication control system for selectively establishing and operating communication between one device and the auxiliary control device. 12. The main control device comprises a connection releasing means for releasing a connection being established with the auxiliary control device at the time when its own device shifts from the active system to the standby system, and the interface at the time when it shifts to the standby system. A stop means for deactivating the means, the auxiliary control device, the connection monitoring means for monitoring whether the connection is establishing or releasing, and when the connection release is detected by the connection monitoring means, Startup control means for activating the active system selecting means, and when the main control device is switched from the active system to the standby system, the auxiliary control device itself switches the connection to a new active system main control device. The communication control system according to claim 11, wherein: 13. The main control device sends a predetermined monitor signal describing signal information to be sent next to the auxiliary control device at an arbitrary and variable time interval, and a response from the auxiliary control device to the monitor signal is sent. 13. The communication control according to claim 11 or 12, further comprising: a signal monitoring unit for monitoring and an abnormality detecting unit for detecting an occurrence of an abnormality when a response to the monitoring signal is not returned within a preset time. system. 14. The auxiliary control device sends a response signal to the supervisory signal when receiving the supervisory signal sent from the main control device, and the signal information described in the supervisory signal. An abnormality detecting means for detecting an abnormality occurrence when the next monitoring signal is not received within the next transmission time or within a time obtained by adding a predetermined margin time to the next transmission time.
3. The communication control system described in 3. 15. The main control device, a basic time holding means for setting and holding a basic time relating to the transmission interval time of the monitoring signal, directly or externally, a processing load detecting means for detecting a processing load of the processor, and A communication load detection unit that detects a communication load with the auxiliary control device, and a fluctuation time calculation unit that calculates an appropriate fluctuation time based on the processing load or the communication load are held by the basic time holding unit. 14. The communication control system according to claim 13, wherein a time obtained by adding the fluctuation time to the determined basic time is set as a transmission interval time of the monitoring signal. 16. A plurality of main control devices, which are multiplexed, are connected to an auxiliary control device by a communication line, and between one working device and the auxiliary control device among the plurality of main control devices. In the communication control system that selectively establishes and operates the communication of, the main control unit is an interface unit that transmits and receives a connection control signal to and from the auxiliary control unit, and whether the main unit is an active system or a standby system. Regardless, a starting means for activating the interface means, and a status information sending means for sending a status display signal indicating the distinction between the active system and the standby system to the auxiliary control device which has established a connection through the interface means. The auxiliary control device comprises interface means for transmitting and receiving a connection control signal to and from the main control device; Connection establishment means for establishing a connection by sending a connection acceptance signal to all the main control devices through the main control device, and the main control device of the active system in accordance with the state described in the status display signal sent from the main control device. A communication control system comprising: an active system selecting means for selecting 17. An exchange-specific device having a plurality of line / trunk devices accommodating an extension terminal, a public network and a private line and a time switch for controlling a communication path between the line / trunk devices, and from the exchange-specific device. A switching system in which a switching process is performed by a signal sent out, and a main control unit that sends an instruction signal to the time switch and the line / trunk device to the exchange unique device based on the processing result is connected by a communication line. In the exchange-specific device, the number extraction means for extracting the port number of the call request terminal from the call request signal sent from the line / trunk device, and the main control device sent to the time switch. Information extraction means for extracting information corresponding to a port number from a control signal, and a port subject to outgoing call regulation and a port not subject to outgoing call regulation Management means for managing in association with No. congestion level service class of the terminal,
The main control device, further comprising: a determination unit that refers to a port number managed by the management unit and determines whether to restrict transmission of a terminal corresponding to the port number extracted by the number extraction unit. Comprises a determining means for determining whether or not to restrict transmission of the terminal according to the service class of the terminal receiving the call request and the communication load of the communication line, and the main control device and the exchange-specific device The communication load of the communication line is monitored with, and when the communication load exceeds a predetermined level, communication is performed by both the main control device and the exchange specific device based on the level and the service class of the terminal. An exchange system characterized by performing regulatory control. 18. The main control unit, when the communication load of the communication line reaches a certain level or more, from the port number in the call request signal of the extension terminal received from the exchange-specific device through the communication line, the terminal. The service class is extracted, and it is determined whether or not to restrict outgoing call based on the service class and the level of the communication load. Only when it is determined that outgoing call is not restricted, the time switch of the exchange-specific device is connected to the switch through the communication line. 18. The exchange system according to claim 17, wherein a control signal is transmitted to the exchange system to continue the exchange process. 19. The exchange-specific device, when receiving a call request signal from an extension, determines whether the port number of the extension is registered as a call restriction port. If the call request signal is discarded by the device itself and is not registered, it is registered as a port of the call regulation, and the call request signal is transmitted to the main control device through the communication line, and then the call control signal is transmitted. When the main control unit decides not to restrict outgoing call, the information corresponding to the port number is taken out from the control signal sent from the main control unit to the time switch, and the port is deleted from the outgoing call restriction port. 18. The exchange system according to claim 17, further comprising: registering with a port that is not subject to transmission control. 20. When the exchange-specific device receives a call request signal from an extension and unconditionally sends a call request signal if the port number of the extension is registered in a port not subject to call control. 18. The exchange system according to claim 17, wherein the switching system transmits to the main control unit through the communication line. 21. An exchange and an external device are connected by a communication path, and the exchange is sent from the external device through the exchange processing unit that performs processing based on a processing request from the external device and the communication path. In a switching system having a communication control unit for receiving an incoming processing request and transferring it to the exchange processing unit, the external device assigns a number to each processing request sent to the exchange. The exchange, in the communication control unit, a request number storage unit that stores a processing request number when the processing request received from the external device is transferred to the exchange processing unit; and the exchange processing unit. In the above, in performing processing based on the processing request transferred from the communication control unit, request number notifying means for notifying the communication control unit of the number of the processing request, and the communication control unit. Section, the number stored in the request number storage means and the number notified by the request number notifying means are compared to determine the number of processing requests in the unprocessed state that have been transferred to the exchange processing section. And an unprocessed request number estimating means for estimating 22. The exchange, in the communication control unit,
When the number of unprocessed requests estimated by the unprocessed request number estimating means exceeds a certain value, a communication regulation control means is provided for regulating the signal output or disconnecting the communication connection to the external device. 22. The exchange system of claim 21, wherein the exchange system is characterized. 23. A plurality of external devices are connected to one exchange through a communication path, and the exchange has an unprocessed state corresponding to each of the external devices by the unprocessed request number estimating means in the communication control unit. A request is estimated, and when the number of unprocessed requests corresponding to any one of the external devices exceeds a certain value, the signal output is regulated or the communication connection is disconnected to the corresponding external device. The exchange system according to claim 21. 24. A plurality of external devices are connected to one exchange through a communication path, and the exchange has an unprocessed state corresponding to each of the external devices by the unprocessed request number estimating means in the communication control unit. Estimate requests and, if the total number of outstanding requests exceeds a certain value, restrict the signal output or disconnect the communication connection to all external devices or external devices with the largest number of outstanding requests. 22. The exchange system of claim 21, wherein the exchange system is characterized.