JPH07212464A - Overload control method for multiprocessor system electronic exchange - Google Patents

Abstract

PURPOSE:To effectively reduce the loads of a call connection control processor by regulating call origination to a subscriber in a subscriber control processor with a lot of call origination requests when the call connection control processor is in an overload state. CONSTITUTION:In the electronic exchange of a multiprocessor system provided with the call connection control processor 30 and the plural subscriber control processors 32, the call connection control processor 30 informs all the subscriber control processors 32 of the overload state when it is detected that the processor 30 is turned to the overload state by an overload monitoring means 31. When the overload state is informed, the respective subscriber control processors 32 investigate the call origination request numbers from the subscribers of the present processors by a call origination request number measuring means 33, a call origination regulation judgement means 34 requests the regulation to a call origination request regulation means 35 when the call origination request number is more than a prescribed number and the call origination regulation means 35 performs disconnection to the succeeding call origination requests from the subscribers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiprocessor type electronic exchange (distributed control electronic exchange) composed of a call connection control processor and a subscriber control processor.
The present invention relates to an overload control method in which when a call connection control processor is overloaded, the subscriber control processor restricts call origination according to an instruction from the call connection control processor so that the load of the call connection control processor can be controlled.

[0002]

2. Description of the Related Art In a conventional distributed control electronic exchange composed of a call connection control processor and a subscriber control processor, a call origination request from a terminal device is temporarily sent to a call connection regardless of the load state of the call connection control processor. The control processor is notified, and the call connection control processor performs restriction processing for the call origination request depending on the load state of its own processor.

[0003]

SUMMARY OF THE INVENTION In the above prior art,
Even if the call connection control processor is overloaded due to a large number of call origination requests, if there is a new call origination request from the subscriber, the call origination request is sent from the subscriber control processor to the call connection control processor. The call connection control processor performs a call restriction process for this call request. This causes the call connection control processor to become even more overloaded,
There is a problem in that the processing capacity of the call connection processing, which is the original purpose, is lowered, and the connectivity to the subscriber is deteriorated.

The present invention has been made in view of the above-mentioned problems. When the call connection control processor is overloaded, the subscriber control processor with a large number of outgoing call requests restricts outgoing calls to subscribers. Therefore, the load of the call connection control processor is effectively reduced.

[0005]

FIG. 1 is an explanatory view of the principle according to the present invention. In FIG. 1, 30 is a call connection control processor, 31 is an overload monitoring means for monitoring the overload state of the call connection control processor 31, 32 is a subscriber control processor, and 33 is a current call origination request from a subscriber of the own processor. Transmission request number measuring means for measuring the number at all times or when there is a request, 34 is a transmission regulation determining means for determining whether or not to perform transmission regulation based on the measurement result of the transmission request number measuring means 33, and 35 is a transmission regulation. A call origination request restricting means for restricting a call origination request from the subscriber based on the judgment result of the judging means 34, and a subscriber terminal 36.

In order to solve the above-mentioned problems, in the first embodiment of the present invention, when the call connection control processor detects that its own processor is in an overloaded state by the overload monitoring means 31, all subscribers. Notify the control processor of the overload condition. Upon receipt of this overload condition notification, each subscriber control processor checks the current number of outgoing calls from the subscriber of its own processor by the outgoing call request number measuring means 33, and the outgoing call regulation judging means 34 determines that the outgoing call request number is a predetermined number. In the above case, the transmission request regulation unit 35 is requested to regulate, and the transmission request regulation unit 35 disconnects the subsequent transmission requests from the subscribers.

According to the second aspect of the present invention, when the call connection control processor detects that its own processor is overloaded by the overload monitoring means, the current number of outgoing call requests for each subscriber control processor. , And makes a call restriction notification to the subscriber control processor whose call request number is a predetermined number or more. The subscriber control processor, which has received the call restriction notification, disconnects the call request from the subsequent subscriber by the call request restriction means.

Further, in the third aspect of the present invention, when the call connection control processor detects that its own processor is in the overload state by the overload monitoring means, it notifies all subscriber control processors of the overload state. . When each subscriber control processor receives this overload condition notification, it checks the current number of outgoing requests from the subscribers of its own processor, and if the number of outgoing requests is more than a predetermined number, it buffers the outgoing requests from the subscriber. Queuing, and when this buffer is full, disconnect for outgoing requests from subsequent subscribers,
When the overload condition on the call connection control processor side is resolved, the call origination request queued in the buffer is taken out and sent to the call connection control processor.

In the fourth aspect of the present invention, the call connection control processor buffers the call origination request received from each subscriber control processor when the overload monitoring means detects that its own processor is in an overloaded state. When all of the subscriber control processors are queued to the call connection control processor 1, notification is sent to all subscriber control processors to cancel the call request to the call connection control processor 1, and the overload state of the call connection control processors is resolved. At that time, the outgoing request queued in the buffer is taken out and processed. When each subscriber control processor receives the call request cancellation request notification, the call request restriction means disconnects the call request from the subsequent subscribers.

Further, in a fifth aspect of the present invention, in the fourth aspect, the call connection control processor receives a call origination request received from each subscriber control processor when it detects that its own processor is overloaded. Is sent to all the subscriber control processors, and each subscriber control processor checks the current number of outgoing requests from the subscribers of its own processor when it receives this overload status notification. When the number of outgoing calls is equal to or larger than the predetermined number, the outgoing call request from the subscriber is disconnected.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Throughout the following figures, circuits having the same functions are designated by the same reference numerals.

FIG. 2 shows a multiprocessor type electronic exchange system for carrying out an overload control method at the time of transmission as an embodiment of the present invention. In the figure, 1 is a call connection control processor, 2 is a subscriber control processor, and the distributed control electronic exchange includes one call connection control processor 1 and a plurality of subscriber control processors 2 (# 0 to #n). Consists of inclusive. Each of the subscriber control processors 2 (# 0 to #n) accommodates a plurality of subscriber terminals 3. In the distributed control electronic exchange, the call connection control processor 1 and each subscriber control processor 2 (# 0 to #n) are connected by an inter-processor communication line.

The call connection control processor 1 has an overload monitoring means 1 for monitoring an overload state in the call connection control processor 1.
1 and an outgoing call regulation information notifying means 12 for notifying all subscriber control processors 2 (# 0 to #n) of the overload state when receiving the overload state notice from the overload monitoring means 11. It

The subscriber control processor 2 includes a transmission restriction information receiving means 21, a transmission restriction determining means 22, a transmission request number measuring means 23, and a transmission request restriction means 24. The transmission regulation information receiving means 21 is means for transmitting a regulation judgment request to the transmission regulation judging means when receiving the overload state notification from the call connection control processor 1. The transmission regulation determining means is means for issuing a measurement request to the transmission request number measuring means 23 upon receiving the regulation determination request, receiving a measurement result notification, and sending a regulation request to the transmission request regulating means according to the result. Upon receiving the measurement request, the transmission request number measuring means 213 is a means for measuring the number of transmission requests from the subscriber for a certain period from that time and passing a measurement result notification to the transmission regulation determining means 22. The outgoing call request restricting means 24 is a means for restricting outgoing call of the subscriber terminal when the restriction request is received.

The operation of the system of this embodiment will be described below with reference to the sequence diagram of FIG. In FIG. 3, when the call connection control processor 1 is overloaded, the overload monitoring means 11 of the call connection control processor 1 detects the overloaded state of its own processor and the call regulation information notifying means 12 is overloaded. Notify that it is in a state. The transmission restriction information notifying means 12 transfers this overload state notification from the call connection control processor 1 to all subscriber control processors 2 (# 0 to #n) through the inter-processor communication line.

The transmission regulation information receiving means 21 in each subscriber control processor 2 that has received this overload state notification requests the transmission regulation judging means 22 in its own processor to judge the transmission regulation. Upon receipt of this regulation determination request, the transmission regulation determining means 22 requests the transmission request number measuring means 23 to measure the number of transmission requests from subscribers. The outgoing call request number measuring means 23 measures the outgoing call request number from the subscriber for a certain period of time after receiving the measurement request, and notifies the outgoing call regulation determining means of the measured outgoing call request number. When the number of outgoing call requests received is equal to or greater than a predetermined number, the outgoing call regulation determining unit 22 determines that it is necessary to perform outgoing call regulation, and sets the outgoing call regulation to the outgoing call request regulating unit 24 in its own processor. On the other hand, if the number is less than the predetermined number, no transmission restriction request is made. Upon receiving the call regulation request, the call request regulation means 24 disconnects the call request from the subscriber after the time when the call regulation request is received.

In this way, the transmission control is implemented in the subscriber control processor 2 which has a large number of transmission requests,
The load on the call connection control processor 1 can be effectively reduced. On the other hand, since the call origination request on the side of the subscriber control processor 2 which does not have a large influence on the call connection control processor 1 because the number of call origination requests is not large, the connectivity of the subscriber is improved, and eventually each subscriber Control processor 2
It is possible to average the number of transmission requests transmitted from (# 0 to #n).

FIG. 4 shows another embodiment of the present invention.
This embodiment is different from the above-mentioned embodiment of FIG. 2 in the configuration of the outgoing call request number measuring means 23 'in the subscriber control processor 2. That is, the transmission request number measuring means 2 of this embodiment
3'measures the number of outgoing calls from the subscriber who passes through the self-subscriber control processor 2 at regular intervals from the time when the self-subscriber control processor 2 starts the service. The latest number of outgoing requests is returned every fixed time.

The operation of the system of this embodiment will be described below with reference to the sequence diagram of FIG. In FIG. 4, when the call connection control processor 1 is overloaded, the overload monitoring means 11 of the call connection control processor 1 detects the overloaded state of its own processor, and the call regulation information notifying means 12 is overloaded. Is notified, and the transmission restriction information notifying means 12
Transfers an overload state notification from the call connection control processor 1 to all subscriber control processors 2 (# 0 to #n) through the inter-processor communication line.

Upon receipt of this overload condition notification, the transmission regulation information receiving means 21 in each subscriber control processor requests the transmission regulation judging means 22 in its own processor to judge the transmission regulation, and the transmission regulation judging means 22 makes the transmission. Request number measuring means 23 '
Inquire about the measurement status of the number of outgoing calls from subscribers.
As described above, the transmission request number measuring means 23 'always measures the number of transmissions from the subscribers passing through the self processor every fixed time after the self processor starts the service, and the transmission request number is inquired. At that time, the latest result of measurement of the number of outgoing calls for every fixed time is notified to the outgoing call regulation determining means 22. Upon receiving the notification of the number of outgoing calls, the outgoing call regulation determining means 22 determines that outgoing call regulation is necessary when the number of outgoing call requests is equal to or more than a predetermined number, and the outgoing call regulation means 24 in its own processor notifies the outgoing call regulation means 24. Request outgoing restrictions. Transmission request control means 24
Disconnects the call request from the subscriber after the time when the call regulation request is received.

FIG. 6 shows another embodiment of the present invention. This embodiment is different from the above-described embodiment of FIG. 2 in that the call regulation determining means 13 and the call request number measuring means 14 are provided on the call connection control processor 1 side, and the circuits corresponding to them from the subscriber control processor 2 side. It is in the point except. The outgoing call request number measuring means 14 measures the outgoing call request number of each subscriber control processor 2 for a fixed time from the time of receiving the measurement request, and outputs the measurement result. Since the call origination request of each subscriber control processor 2 is managed by the call connection control processor 1, the number of call origination requests for each subscriber control processor can be measured. The transmission request number measuring means 14 is similar to the transmission request number measuring means 23 'described above.
It may be of a type in which the number of transmission requests from each subscriber control processor is constantly measured at regular time intervals after the service is started.

The operation of the system of this embodiment will be described below with reference to the sequence diagram of FIG. In FIG. 7, when the call connection control processor 1 is overloaded, the overload monitoring means 11 of the call connection control processor 1 detects the overloaded state of its own processor, and the call regulation determination means 13 is overloaded. Notify that there is. Upon receipt of this notification, the transmission restriction determination means 13 requests the transmission request number measurement means 14 to measure the number of transmission requests for each subscriber control processor. Upon receiving this request, the outgoing call request number measuring means 14 measures the outgoing call request number for each subscriber control processor for a certain period from that time, and notifies the outgoing call regulation determining means 13 of the measured outgoing call request number. If there is a subscriber control processor 2 for which the number of call requests requested is greater than or equal to a predetermined number, the call regulation determination means 13 determines that it is necessary to perform call regulation on the subscriber control processor 2. The call restriction information notification means 12 'is requested to notify the call restriction information only to the subscriber control processor 2. The call regulation information notifying means 12 'notifies the subscriber control processor 2 only of the call regulation information.

Upon receipt of this call regulation information, the call regulation information receiving means 21 'in the subscriber control processor requests the call request regulation means 24 in its own processor for call regulation, and the call request regulation means 24 makes the call regulation. Disconnection is performed for outgoing requests from subscribers after receiving the request.

FIG. 8 shows another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 2 is that the subscriber control processor 2 queues the outgoing call request from the subscriber when the outgoing call is restricted, instead of immediately disconnecting it. Therefore, the subscriber control processor 2 is newly provided with an outgoing call request queue managing means 25, an outgoing call request queuing means 26, and an outgoing call request queue extracting means 27.

The operation of the system of this embodiment will be described below with reference to the sequence diagram of FIG. When the call connection control processor 1 is overloaded, the call connection control processor 1
The overload monitoring means 11 detects the overload state of its own processor and notifies the call regulation information notifying means 12 of the overload state. The call regulation information notifying means 12 causes the call connection control processor 1 to notify all subscribers. Control processor 2 (# 0 to #
The overload status notification is transferred to n) via the inter-processor communication line.

The call regulation information receiving means 21 in each subscriber control processor 2 which has received this overload state notification requests the call regulation determining means 21 in its own processor to determine the call regulation. Upon receipt of this request, the transmission regulation judging means 22 requests the transmission request number measuring means 23 to measure the number of transmission requests from the subscribers, and the transmission request number measuring means 23 makes a transmission request from the subscribers for a certain period from that point. Measure the number,
The measured transmission request count is notified to the transmission regulation determining means 22. If the notified number of outgoing call requests is equal to or more than a predetermined number, the outgoing call regulation determining means 22 determines that outgoing call regulation is necessary, and the outgoing call regulation means 24 'in its own processor.
Request outgoing restrictions.

The transmission request regulation means 24 'responds to the transmission request from the subscriber after receiving the transmission regulation request,
Instead of immediately restricting the outgoing call to the subscriber as in the embodiment of FIG. 2, the outgoing call request queue managing means 25 is requested to queue the outgoing call request. When receiving the request, the outgoing call request queue managing means 25 receives the outgoing call request queuing means 2
6, the call origination request queuing means 26 queues the call origination requests from the subscribers in the buffer in the received order. When the transmission request queue management means 25 determines that the buffer for queuing the transmission request is exhausted, it requests the transmission request regulation means 24 'to regulate the transmission request, and the transmission request regulation means 2
Reference numeral 4'cuts off the call request from the subscriber after receiving the call request regulation request.

The call origination request queued by the call origination request queuing means 27 is taken out after the overload condition on the call connection control processor side is resolved and the notification of the overload condition is released. In this case, the transmission request regulation means 2
4 ′ makes a queuing cancellation request to the outgoing call request queue managing means 25, and the outgoing call request queue managing means 25 that has received this request makes a outgoing queue request to the outgoing call request queue removing means 27. As a result, the call origination request take-out means 27 takes out the call origination requests that have been queued in the order of queuing and sends them to the call connection control processor 1.

FIG. 10 shows another embodiment of the present invention. This embodiment is different from the embodiment shown in FIG. 8 described above in that a mechanism for queuing an outgoing call request from each subscriber control processor 2 is provided on the call connection control processor 1 side. The control processor 1 includes call connection restriction means 15, call origination request queue management means 16, call origination request queuing means 17, and call origination request queue extraction means 18.
Is equipped with. Further, the transmission regulation information receiving means 21 ″ on the subscriber control processor 2 side can not only make a regulation determination request to the transmission regulation determining means 22 but also directly make a regulation request to the transmission request regulating means 24 ″. .

The operation of the system of this embodiment will be described below with reference to the sequence diagram of FIG. When the call connection control processor 1 is overloaded, the overload monitoring means 11 of the call connection control processor 1 detects the overload state of its own processor and the call regulation information notifying means 12 ″ is overloaded. The transmission restriction information notifying means 12 ″ transfers the overload state notification from the call connection control processor 1 to all the subscriber control processors 2 (# 0 to #n) by the inter-processor communication line in the same manner as described above. At the same timing as this, the call connection regulating means 15 in the own processor is also notified of the overload state.

As a result, each subscriber control processor 2 (#
0 to #n) perform the same call request regulation as described in the embodiment of FIG. That is, the subscriber control processor 2 with a large number of call origination requests disconnects the call origination request from the subscriber terminal 3, but the call origination request from the subscriber control processor 2 that is not so is sent to the call connection control processor 1.

In the call connection control processor 1, the call connection regulation means 15 which has received the overload state notification queues the call origination request received from the respective subscriber control processors 2 (# 0 to #n) to the call origination request queue management means 16. Ask for Ing. Upon receipt of this request, the transmission request queue management means 16 requests the transmission request queuing means 17 to queue those transmission requests. The call origination request queuing means queues the call origination requests from the subscriber control processors 2 (# 0 to #n) in the order of reception. When it is determined that the buffer for queuing the outgoing call request is exhausted, the outgoing call request queue managing means 17 notifies the call connection restricting means 15 of the buffer management information that the outgoing process buffer is exhausted. Upon receiving the notification of the buffer management information, the call connection regulation means 15 requests the transmission regulation information notification means 12 ″ to make the transmission regulation.

Upon receipt of the call regulation request, the call regulation information notifying means 12 "receives all the call regulation requests from all subscriber control processors 2 (# 0 to #).
In step n), the call connection control processor 1 is immediately notified of a request to stop the call. The call regulation information receiving means 21 ″ of all subscriber control processors 2 (# 0 to #n) that have received this call cancellation request is the call request regulation means 2 in its own processor.
4 "directly requests the call regulation, and the call request regulation means 24" disconnects the call request from the subscriber after receiving the call regulation request.

The call origination request queued by the call origination request queuing means 27 is taken out after the overload condition on the call connection control processor side is eliminated. In this case, the call control restricting means 15 requests the call origination request queue managing means 16 to cancel the call origination restricting floor, and the call origination request queue managing means 16 having received the request requests the call origination request queue extracting means 18 to take out the queue. do. As a result, the call origination request queuing means 18 takes out the queuing origination requests in the queuing order, and the call connection control processor 1
Processes this outgoing request.

In the embodiment shown in FIG. 10, when it is detected that the call connection control processor 1 is in the overload state, all the subscriber control processors 2 (# 0 to #n) are notified of the overload state. Instead of performing the notification, the notification may not be performed. In that case, each subscriber control processor 2 (#
0 to #n) does not regulate the outgoing call request based on the measurement value of the outgoing call request number, and the outgoing call stop request is issued to all subscriber control processors 2 when the queuing buffer on the call connection control processor 1 side is full. When notified to (# 0 to #n), each subscriber control processor 2 (# 0 to #n) immediately makes a call origination request from its own subscriber terminal 3 in the same procedure as described in the embodiment of FIG. Disconnect.

[0036]

As described above, according to the present invention, when the call connection control processor is in an overloaded state, the subscriber control processor with a large number of outgoing requests restricts outgoing calls to subscribers. , The load of the call connection control processor can be effectively reduced.

For this reason, it is possible to improve the connectivity of the subscriber on the subscriber control processor side, which does not significantly affect the load state of the call connection control processor (that is, there are few outgoing call requests), and each subscriber in the electronic switchboard can be improved. It is possible to average the number of call origination requests sent by the caller control processor to the call connection control processor. In addition, by queuing the call origination request in the processing queue in the call connection control processor or the subscriber control processor, the re-call from the subscriber is not required, so that the connectivity from the subscriber can be improved.
As a result, the system as a whole can quickly return from the overloaded state to the normal state.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a multiprocessor type electronic exchange that performs an overload control method according to an embodiment of the present invention.

3 is an operation sequence diagram of the embodiment system of FIG.

FIG. 4 is a diagram showing a multiprocessor type electronic exchange that performs an overload control method according to another embodiment of the present invention.

5 is an operation sequence diagram of the embodiment system of FIG.

FIG. 6 is a diagram showing a multiprocessor type electronic exchange that performs an overload control method according to still another embodiment of the present invention.

7 is an operation sequence diagram of the embodiment system of FIG.

FIG. 8 is a diagram showing a multiprocessor type electronic exchange that performs an overload control method according to still another embodiment of the present invention.

9 is an operation sequence diagram of the embodiment system of FIG.

FIG. 10 is a diagram showing a multiprocessor type electronic exchange that performs an overload control method according to still another embodiment of the present invention.

11 is an operation sequence diagram of the embodiment system of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Call connection control processor 2 Subscriber control processor 3 Subscriber terminal 11 Overload monitoring means 12, 12 ', 12 "Transmission restriction information notification means 13, 21, 21', 21" Transmission restriction information receiving means 15 Call connection restriction means 22 outgoing call regulation judging means 14, 23, 23 'outgoing call request number measuring means 24, 24', 24 "outgoing call request regulating means 16, 25 outgoing call request queue managing means 17, 26 outgoing call request queuing means 18, 27 outgoing call queue extraction means

Claims (5)

[Claims] 1. An overload control method for controlling an overload state of a call connection control processor in a multiprocessor type electronic exchange having a call connection control processor (30) and one or more subscriber control processors (32). When the call connection control processor detects that its own processor is overloaded, it notifies all subscriber control processors of the overload status. When each subscriber control processor receives this overload status notification, Find out the current number of outgoing requests from subscribers,
An overload control method for a multiprocessor type electronic exchange, wherein when the number of outgoing calls exceeds a predetermined number, the subsequent outgoing calls from subscribers are disconnected. 2. An overload control method for controlling an overload state of a call connection control processor in a multiprocessor type electronic exchange having a call connection control processor and one or more subscriber control processors, the call connection control processor comprising: When it detects that its own processor is overloaded, it checks the current number of outgoing call requests for each subscriber control processor, and issues a call restriction notice to subscriber control processors with a predetermined number or more of outgoing call requests. A method for overload control of a multiprocessor type electronic exchange in which the subscriber control processor that receives the call regulation notification disconnects a call request from a subscriber thereafter. 3. An overload control method for controlling an overload state of a call connection control processor in a multiprocessor type electronic exchange having a call connection control processor and one or more subscriber control processors, the call connection control processor comprising: When it detects that its own processor is overloaded, it sends an overload notification to all subscriber control processors, and each subscriber control processor receives the overload notification and receives the current notification from the subscribers of its own processor. Check the number of outgoing requests,
If the number of outgoing calls is more than a predetermined number, outgoing calls from subscribers are queued in a buffer, and when the buffer is full, the outgoing calls from subsequent subscribers are disconnected and call connection is made. An overload control method for a multiprocessor type electronic exchange in which a call origination request queued in a buffer is taken out and sent to a call connection control processor when an overload condition on the control processor side is resolved. 4. An overload control method for controlling an overload state of a call connection control processor in a multiprocessor type electronic exchange having a call connection control processor and one or more subscriber control processors, the call connection control processor comprising: When it detects that its own processor is overloaded, it queues the call origination request received from each subscriber control processor, and when all the subscriber control processors are full, the call connection control processor 1 is notified to request cancellation of the outgoing call request, and when the overload condition of the call connection control processor is resolved, the outgoing call request queued in the buffer is taken out and processed. When the call request cancellation request notification is received, the call is cut off in response to the call request from the subscriber thereafter. Overload control method of Chi processor-based electronic exchange. 5. The overload control method for a multiprocessor type electronic exchange according to claim 4, wherein said call connection control processor receives from each subscriber control processor when it detects that its own processor is overloaded. In addition to queuing the generated outgoing requests in a buffer, it also notifies all subscriber control processors of the overload condition. When each subscriber control processor receives this overload condition notification, the current number of outgoing requests from the subscribers of its own processor. And a method for overload control of a multiprocessor type electronic exchange in which if the number of outgoing calls is equal to or more than a predetermined number, the subsequent outgoing calls from subscribers are disconnected.