JP2022011938A - Telephone switch and congestion control system - Google Patents

Abstract

To provide a telephone switch which can restrict call origination with the arbitrary priority setting of extension terminal communication.SOLUTION: The telephone switch which accommodates a plurality of telephone units includes: a processing control unit which controls the switching operation of the plurality of telephone units; a monitor function unit which monitors the usage rate of the processing control unit; and a storage unit which stores the priority of originating call restriction for each of the plurality of telephone units. The processing control unit restricts call origination for at least a part of the plurality of telephone units, based on the usage rate of the processing control unit and the priority of the call origination restriction for each of the plurality of telephone units.SELECTED DRAWING: Figure 1

Description

The present invention relates to a telephone exchange and a congestion control system for the telephone exchange.

In the telephone exchange, congestion control of a central processing unit (hereinafter referred to as a CPU) is performed. As a method of congestion control, for example, the CPU usage rate is monitored, and when the usage rate exceeds a specified value, the transmission of an extension is reduced to some percentage. On the other hand, the extension service class of the extension terminal is managed in association with the congestion level of the CPU, and the extension terminal makes a call based on the extension service class of the extension terminal that made the call request and the communication load of the communication line. A communication control system for determining whether or not to regulate has been proposed (for example, Patent Document 1). In such a communication control system, the deterioration of the quality of service during congestion control is suppressed by giving priority to the call of the extension terminal having a high extension service class.

Japanese Unexamined Patent Publication No. 9-20308

In the above-mentioned conventional communication control system, the extension service class originally used for limiting the call destination is used as the standard for congestion control. Therefore, in congestion control, it is not possible to give priority to a terminal having a low extension service class. In addition, since restrictions are imposed for each extension service class, it is difficult to use it for the purpose of prioritizing calls from any terminal, such as the fact that there is no difference in priority between extension terminals that belong to the same extension service class. There was a problem.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a telephone exchange in which an extension terminal subject to call restriction can be selected for each terminal regardless of the extension service class of the extension terminal. do.

The telephone exchange according to the present invention is a telephone exchange that accommodates a plurality of telephones, and includes a processing control unit that controls an exchange operation for the plurality of telephones, a monitoring function unit that monitors the usage rate of the processing control unit, and the above-mentioned. It has a storage unit that stores the priority of call restriction for each of the plurality of telephones, and the process control unit has the usage rate of the process control unit and the call for each of the plurality of telephones. It is characterized in that calling is restricted for at least a part of the plurality of telephones based on the priority of regulation.

Further, the congestion control system according to the present invention is a congestion control system that controls the processing congestion of the telephone exchange in a telephone system including a plurality of telephones and a telephone exchange accommodating the plurality of telephones. The telephone exchange stores a processing control unit that controls the exchange operation for a plurality of telephones, a monitoring function unit that monitors the usage rate of the processing control unit, and a priority of call restriction for each of the plurality of telephones. The processing control unit has a storage unit, and the processing control unit is among the plurality of telephones based on the usage rate of the processing control unit and the priority of the call restriction for each of the plurality of telephones. It is characterized by restricting calls for at least a part of.

According to the present invention, it is possible to arbitrarily set the priority of the call of the extension terminal to restrict the call.

It is a block diagram which shows the structure of the telephone exchange system of Example 1. FIG. It is a figure which shows the regulation class data of an extension terminal schematically. It is a figure which shows the relationship between a regulation class and a regulation level. It is a figure which shows the transition of a regulation level. It is a sequence diagram which shows the operation of each part of the congestion control system of Example 1. FIG. It is a block diagram which shows the structure of the telephone exchange system of Example 2. Breakdown of request to update regulation table for regulation level operation. It is a sequence diagram which shows the operation of each part of the congestion control system of Example 2.

Hereinafter, examples of the present invention will be described with reference to the drawings. In the description and the accompanying drawings in each of the following examples, substantially the same or equivalent parts are designated by the same reference numerals.

FIG. 1 is a block diagram showing a configuration of the telephone system 100 of this embodiment. The telephone system 100 is a communication system including a premises network provided in the premises of a business establishment or the like. The telephone system 100 of this embodiment has a congestion control system of a central control device (hereinafter referred to as a CPU) of the private branch exchange 10, and regulates the calling of an extension according to the usage rate of the CPU. The telephone system 100 includes a private branch exchange 10 and a group of extension telephone terminals including extension terminals 20A and 20B.

The private branch exchange 10 is the main device in the telephone system 100 of this embodiment. The private branch exchange 10 is connected to the extension terminal group including the extension terminals 20A and 20B via the extension telephone network. The private branch exchange 10 performs a telephone communication exchange operation between extension terminals to form a communication path. Further, the private branch exchange 10 is connected to a public line network (not shown) and is configured to be able to form a communication path between an external telephone and an extension terminal.

The telephone system 100 of this embodiment has a congestion control system of a processing control unit (central control device, hereinafter referred to as a CPU) of the private branch exchange 10, and regulates the calling of an extension according to the usage rate of the CPU. In this embodiment, any one of the three levels of regulation class (regulation class 0, regulation class 1 and regulation class 2 in this embodiment) indicating the priority of the call restriction is set for each of the extension terminals. The private branch exchange 10 determines whether or not to restrict the calling of the extension terminal for each regulation class according to whether or not the CPU usage rate satisfies a predetermined condition. Further, in the congestion control system of the present embodiment, the call is restricted in three stages of the regulation level 0 to 2 according to the CPU usage rate.

The private branch exchange 10 includes a database function block 11, a resident function block 12, and a call control function block 13.

The database function block 11 is a database that stores information (regulation class data) of the regulation class of each extension terminal.

FIG. 2A is a diagram schematically showing regulation class data of each extension terminal stored in the database function block 11. In the database function block 11, the extension number of the extension terminal and the information of the regulation class of the extension terminal are stored in association with each other.

FIG. 2B is a diagram showing the correspondence between the regulation class and the regulation level. In this embodiment, multiple levels of regulation (regulation level 0, regulation level 1 and regulation level 2) corresponding to the regulation class are provided, and when a certain regulation level of call regulation is activated, it corresponds to this. Calling of a phone of a regulated class below the regulated class is restricted.

Regulation class 0 is a regulation class for extension terminals that are not subject to regulation at any of regulation levels 0 and 2. As a general rule, extension terminals whose regulation class is not registered fall under regulation class 0. The regulation class 1 is a regulation class set for the extension terminal subject to the regulation of outgoing calls at the regulation level 2. The regulation class 2 is a regulation class set for the extension terminal subject to the regulation of outgoing calls at the regulation level 1 and the regulation level 2. At regulation level 0, any extension terminal of regulation class 0 to 2 is not subject to regulation.

As a method of setting the regulation class for each extension terminal, there are command input to the electronic exchange main body of the private branch exchange 10, key operation input to the extension terminal, and the like. The regulation class data stored in the database function block 11 is updated by the input.

Further, the database function block 11 stores a regulation table (not shown) indicating the current regulation level. The database function block 11 updates the regulation table in response to the notification of the detection result of the CPU usage rate from the resident function block 12. This regulation table is referred to by the call control function block 13, whereby the call of each extension terminal is restricted.

Referring to FIG. 1 again, the resident functional block 12 is a functional block that monitors the usage rate of the CPU of the private branch exchange 10. The resident function block 12 monitors the CPU usage rate every 3 seconds, for example, and when the CPU usage rate satisfies a predetermined condition (in this embodiment, the CPU usage rate changes beyond a predetermined reference value and becomes When that state continues for a certain period of time), a request for rewriting the regulation level of the regulation table is supplied to the database function block 13.

The call control function block 13 is a function block that controls the call of the extension terminal. The call control function block 13 is included in the CPU, which is a processing control unit. The call control function block 13 compares the currently activated regulation level shown in the regulation table of the database function block 11 with the regulation class of each extension terminal, and makes a call to the extension terminal subject to regulation based on this. Regulate.

The extension terminals 20A and 20B are terminals housed in the private branch exchange 10. In this embodiment, the extension terminal 20A is set to the regulation class 1, and the extension terminal 20B is set to the regulation class 2.

FIG. 3 is a diagram showing a transition of the regulation level in the congestion control system of this embodiment. "Regulation level 0" is a state in which calls are not regulated for any extension terminal, and "regulation level 1" is a regulation state in which calls are restricted only for extension terminals of regulation class 2, "regulation level 2". "Is a regulated state that regulates calls for extension terminals of regulation class 1 and regulation class 2.

When the CPU usage rate exceeds the first activation reference value (level 1 activation reference value) in the regulation level 0 state (that is, the normal state in which call restriction is not performed), and the state continues for a certain period of time. , The private branch exchange 10 shifts the regulated state level from the regulated level 0 to the regulated level 1. That is, the call control function block 13 starts restricting calls to the extension terminal of the regulation class 2.

In the state of regulation level 1, when the CPU usage rate exceeds the second activation reference value (level 2 activation reference value) and the state continues for a certain period of time, the private branch exchange 10 sets the level of the regulation state to the regulation level. Transition from 1 to regulation level 2. That is, the call control function block 13 starts the restriction of calling for the extension terminal of the regulation class 1 in addition to the extension terminal of the regulation class 2.

On the other hand, when the CPU usage rate continuously falls below the second release reference value (level 2 release reference value) for a certain period of time in the regulated level 2, the private branch exchange 10 sets the regulated level to the regulated level 2. To transition to regulation level 1. That is, the call control function block 13 releases the restriction on the outgoing call of the extension terminal of the regulation class 1.

Further, when the CPU usage rate continuously falls below the first cancellation reference value (level 1 cancellation reference value) for a certain period of time in the regulation level 1, the private branch exchange 10 sets the regulation level to the regulation level 1. To transition to regulation level 0. That is, the call control function block 13 releases the restriction on the outgoing call of the extension terminal of the regulation class 2.

The automatic activation / cancellation functions of these regulation levels can be arbitrarily switched between valid and invalid. It is also possible to enable only one-way transitions of the regulation level.

Next, in the telephone system 100 of this embodiment, the operation of each part when the usage rate of the CPU of the private branch exchange 10 exceeds the reference value will be described.

FIG. 4 is a sequence diagram showing the operations of the extension terminal 20A, the extension terminal 20B, the database function block 11, the resident function block 12, and the call control function block 13. Here, it is assumed that processing congestion occurs in the private branch exchange 10 and the CPU usage rate exceeds the first activation reference value (level 1 activation reference value).

In the resident function block 12, the usage rate of the CPU of the private branch exchange 10 exceeds the first activation reference value and the state continues for a certain period of time (that is, the activation condition of the call restriction of the regulation level 1 is satisfied. That) is detected (S101).

The resident function block 12 notifies the database function block 11 of a request for updating the regulation level value indicating the activation of the call regulation of the regulation level 1 (S102).

At this stage, the private branch exchange 10 notifies the user of an alarm that the call restriction of the regulation level 1 is activated. As the message used for the alarm, for example, a maintenance control of the private branch exchange 10, an autonomous message displayed in the failure log, a message of scanning the lamp of the external alarm device, and the like can be considered.

The database function block 11 updates the regulation table indicating the current regulation state in response to the regulation level value update request from the resident function block 12 (S103).

The call control function block 13 refers to the regulation class data and the regulation table of each extension terminal stored in the database function block 11 to determine whether or not to restrict the call.

For example, upon receiving a call from the extension terminal 20B (S104), the call control function block 13 accesses the database function block 11 to confirm the regulation class and the current regulation level of the extension terminal 20B (S105). Since the extension terminal 20B is set to the regulation class 2, it is subject to the call regulation of the regulation level 1. Therefore, the call control function block 13 returns an error indicating that the service cannot be used to the extension terminal 20B (S106).

The extension terminal 20B is restricted from making calls. At this time, the user is notified that the call is restricted by means such as sounding a connection restriction sound (ROT) or displaying a message on the display of the extension terminal 20B.

On the other hand, upon receiving a call from the extension terminal 20A (S107), the call control function block 13 accesses the database function block 11 to confirm the regulation class and the current regulation level of the extension terminal 20A (S108). Since the extension terminal 20A is set to the regulation class 1, it is not subject to the call regulation of the regulation level 1. Therefore, the call control function block 13 does not restrict the call of the extension terminal 20A, and the private branch exchange 10 continues the call processing of the extension terminal 20A.

Next, it is assumed that the CPU usage rate continues to fall below the first release reference value (level 1 release reference value). The resident function block 12 has a CPU usage rate of the private branch exchange 10 below the first cancellation reference value and the state has continued for a certain period of time (that is, the condition for canceling the call restriction of the regulation level 1 has been satisfied. ) Is detected (S109).

The resident function block 12 notifies the database function block 11 of a request for updating the regulation level value indicating the cancellation of the call restriction of the regulation level 1 (S110).

The database function block 11 updates the regulation table in response to the notification of the detection result from the resident function block 12 (S111).

As described above, according to the telephone exchange of this embodiment, the call is restricted according to the increase in the CPU usage rate of the private branch exchange 10, and the extension terminal to which the regulation class is registered is preferentially regulated. Therefore, it is possible to limit the traffic and control the processing congestion.

Further, in the telephone system 100 of the present embodiment, the extension terminal whose regulation class is not registered (that is, the extension terminal of the regulation class 0) is not subject to call restriction. For this reason, by excluding extension terminals that are not subject to call restriction from the target of setting the regulation class in advance, stable communication services can be provided to any extension terminal even in situations where processing congestion is occurring. be able to.

The congestion control system of this embodiment is particularly useful when it is desired to set the call priority for each group to which the extension terminal belongs. For example, regulation class 1 or regulation class 2 is set for the extension terminal of the department with low call priority according to the work content of each department of the business establishment, and the extension terminal of the department with high call priority is set. By not setting the regulation class, it is possible to exclude extension terminals of departments with high call priority from calling restrictions.

According to the telephone exchange of this embodiment, it is possible to select the regulation target regardless of the extension service class by setting the call restriction regulation class separately from the extension service class linked to the call destination restriction. Become.

Next, Example 2 of the present invention will be described. In the telephone system of the first embodiment, automatic call restriction (hereinafter, simply referred to as automatic regulation) is performed according to the monitoring result of the CPU usage rate, but in the telephone system of the present embodiment, this is applied. In addition, it is possible to manually activate the call restriction (hereinafter referred to as manual restriction) by operating the private branch exchange.

FIG. 5 is a block diagram showing the configuration of the telephone system 200 of this embodiment. The telephone system 200 of the present embodiment is different from the telephone system 100 of the first embodiment in that it has a station setting data function unit 14.

The station setting data function unit 14 accepts a manual call restriction activation operation, and supplies a request for rewriting the regulation table to the database function block 13 based on the accepted activation operation.

In the following description, the regulation level of automatic regulation on the regulation table is referred to as an automatic setting area, and the regulation level of manual regulation is referred to as a manual setting area. Further, the higher level value of the level value of the automatic setting area and the level value of the manual setting area is used as the regulation level of the call restriction.

Figure 6 shows the breakdown of the regulation level update request on the regulation table for the regulation level operation (invocation of automatic regulation / cancellation of automatic regulation / activation of manual regulation / cancellation of manual regulation) for each of automatic regulation and manual regulation. It is a figure which shows. "Activated" means a transition in the direction of increasing the regulation level, and "released" means a transition in the direction of decreasing the regulation level.

When the automatic regulation is activated based on the CPU usage rate, the level value in the automatic setting area is updated. At this time, the level value in the manual setting area is not updated.

Further, when the automatic regulation is released based on the CPU usage rate, the level value of the automatic setting area is updated. At this time, the level value in the manual setting area is not updated.

When the manual regulation is activated by the manual operation of the private branch exchange 10, the level value in the manual setting area is updated. At this time, the level value of the automatic setting area is not configured.

On the other hand, when the manual regulation is released by the manual operation of the private branch exchange 10, the level value in the manual setting area is updated. In addition, when the manual regulation is lifted, the level value in the automatic setting area is also updated.

That is, the level value of the manual setting area is not affected by the activation and cancellation of the automatic regulation, but the level value of the automatic setting area is updated by the cancellation of the manual regulation. Therefore, the call restriction can be canceled by manual operation regardless of whether it is due to automatic regulation or manual regulation.

Next, the operation of each part in the congestion control in the telephone system 200 of this embodiment will be described.

FIG. 7 is a sequence diagram showing the operations of the extension terminal 20A, the extension terminal 20B, the database function block 11, the station data setting function block 14, and the call control function block 13. Here, the case where the regulation class 1 is set in the extension terminal 20A and the regulation class 2 is set in the extension terminal 20B is shown.

The station data setting function block 14 receives a manual activation instruction of regulation level 1 in response to the operation of the private branch exchange 10 (S201).

The station data setting function block 14 supplies the database function block 11 with a request for updating the regulation level value by the operation of invoking the manual regulation (S202).

The database function block 11 receives a request for updating the regulation level value from the station data setting function block 14 and updates the regulation table indicating the current regulation state (S203).

The call control function block 13 refers to the regulation class data and the regulation table of each extension terminal stored in the database function block 11 to determine whether or not to restrict the call.

For example, upon receiving a call from the extension terminal 20B (S204), the call control function block 13 accesses the database function block 11 to confirm the regulation class and the current regulation level of the extension terminal 20B (S205). Since the extension terminal 20B is set to the regulation class 2, it is subject to the call regulation of the regulation level 1. Therefore, the call control function block 13 returns an error indicating that the service cannot be used to the extension terminal 20B (S206).

On the other hand, upon receiving a call from the extension terminal 20A (S207), the call control function block 13 accesses the database function block 11 to confirm the regulation class and the current regulation level of the extension terminal 20A (S208). Since the extension terminal 20A is set to the regulation class 1, it is not subject to the call regulation of the regulation level 1. Therefore, the call control function block 13 does not restrict the call of the extension terminal 20A, and the private branch exchange 10 continues the call processing of the extension terminal 20A.

Next, the station data setting function block 14 receives a manual release instruction of the regulation level 1 in response to the operation of the private branch exchange 10 (S209).

The station data setting function block 14 supplies the database function block 11 with a request for updating the regulation level value in response to the reception of manual deregulation (S210).

The database function block 11 receives a request for updating the regulation level value from the station data setting function block 14 and updates the regulation table indicating the current regulation state (S211).

As described above, according to the telephone exchange of this embodiment, the maintenance of the telephone system is provided by providing a manual regulation level setting function and enabling the manual activation and cancellation of the call restriction at an arbitrary timing. It is possible to improve the sex. For example, in an environment where the automatic activation and cancellation of call restrictions occur repeatedly, by enabling only the automatic activation of the regulation level and manually limiting the release of the regulation level, the state of the call restriction Can eliminate the instability that changes frequently.

The embodiments of the present invention are not limited to those described in the above examples. For example, in the above embodiment, an example in which the regulation level is set to 3 levels of 0 to 2 has been described. However, the present invention is not limited to this, and call regulation may be performed at a more subdivided regulation level. In addition, call regulation may be performed only in two stages of whether or not to activate the regulation. Similarly, the number of regulation classes set in the extension terminal is not limited to the three stages described in the above embodiment.

100 Telephone system 10 Telephone exchange 11 Database function block 12 Resident function block 13 Call control function block 14 Station data setting function block 20A, 20B Extension terminal 200 Telephone system

Claims (7)

A telephone exchange that accommodates multiple telephones
A processing control unit that controls the exchange operation for the plurality of telephones, and
A monitoring function unit that monitors the usage rate of the processing control unit,
A storage unit that stores the priority of call restriction for each of the plurality of telephones, and a storage unit.
Have,
The processing control unit makes a call to at least a part of the plurality of telephones based on the usage rate of the processing control unit and the priority of the call restriction for each of the plurality of telephones. A telephone exchange characterized by regulation. The storage unit stores the plurality of regulation classes set stepwise according to the priority of the call restriction and the plurality of telephones in association with each other.
The processing control unit performs call restriction at a plurality of regulation levels corresponding to the plurality of regulation classes, and sets the regulation level by gradually switching according to a change in the usage rate of the processing control unit. The telephone exchange according to claim 1, wherein the telephone exchange of the regulation class or less corresponding to the set regulation level is restricted. The telephone exchange according to claim 2, wherein the processing control unit switches the regulation level when the usage rate of the processing control unit reaches a reference value for a certain period of time. The telephone exchange accepts the operation of manually invoking the call restriction,
The telephone exchange according to claim 2 or 3, wherein the processing control unit regulates the call of the plurality of telephones based on the manual activation operation of the call restriction. The processing control unit determines the usage rate of the processing control unit when the usage rate of the processing control unit has reached the reference value for a certain period of time or when the manual call restriction activation operation is accepted. The call is made based on the higher of the regulation level of the automatic regulation which is the call regulation according to the change and the regulation level of the manual regulation which is the call regulation according to the activation operation of the manual call regulation. The telephone exchange according to claim 4, wherein the call is restricted. The telephone exchange accepts the operation of releasing the manual regulation, and receives the operation.
The telephone exchange according to claim 5, wherein the processing control unit cancels both the automatic regulation and the manual regulation in response to the operation of canceling the manual regulation. A congestion control system that controls the processing congestion of the telephone exchange in a telephone system including a plurality of telephones and a telephone exchange accommodating the plurality of telephones.
The telephone exchange is
A processing control unit that controls the exchange operation for the plurality of telephones, and
A monitoring function unit that monitors the usage rate of the processing control unit,
A storage unit that stores the priority of call restriction for each of the plurality of telephones, and a storage unit.
Have,
The processing control unit makes a call to at least a part of the plurality of telephones based on the usage rate of the processing control unit and the priority of the call restriction for each of the plurality of telephones. Congestion control system characterized by regulation.

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