JPH02149095A - Multiprocessor type accumulation program controlling exchange system - Google Patents

Abstract

PURPOSE:To prevent the application of load only to a specific processor by providing the system with a processor using rate control means for detecting the using rate of a processor, and at the time of starting a call, selecting a processor with a low using rate from the detecting result of said control means and executing calling processing. CONSTITUTION:A processor 2 is provided with an execution processor number control memory corresponding to a subscriber's storage number and a processor using rate control memory. When a subscriber 3-1 generates a call, the processor 2 decides whether the using rate (x% > k%) of the self-processor is more than a regulated value (overload k%) or not by referring the processor using rate (occupation rate) control memory, and when the using rate is more than the regulated value, searches the processor using rate control memory to select a processor 2-n with the lowest using rate. Then, the selected execution processor number is set up in an execution processor number control memory and the call is reproted to the processor concerned together with a subscriber's storage position (stored processor information).

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multiprocessor storage program controlled switching system, and in particular, to a system for preventing a specific processor from being overloaded when a call processing program is executed. A multiprocessor-type storage program-controlled exchange system equipped with a load distribution processing function is installed.

BACKGROUND OF THE INVENTION In conventional multiprocessor storage program controlled switching systems, call processing programs are executed in a processor that accommodates an originating subscriber or trunk. Therefore, if congestion occurs due to abnormal calls made by subscribers accommodated in a particular processor or abnormal startups caused by large trunks, only that processor will become overloaded, even if other processors are normally loaded. It became.

[Problems to be solved] In the conventional multiprocessor storage program-controlled switching system described above, processing delays and calling restrictions occur in a specific processor even though other processors are under normal load. There was a problem.

The present invention has been made in view of the above problems, and by arbitrarily selecting a processor for executing a call processing program regardless of the subscriber or the processor accommodating the trunk, only a specific processor can be prevented from being overloaded. The purpose of the present invention is to provide a multiprocessor-type storage program-controlled exchange system that can reduce the probability that this occurs.

[Means for Solving the Problems] In order to achieve the above object, the multiprocessor storage program controlled switching system of the present invention includes a processor that includes a processor usage rate management means for detecting the usage rate of each processor, and the subscriber control circuit described above. and load distribution means for selecting a processor with a low usage rate based on the detection result by the processor usage rate management means when a call is started from a processor, and causing the selected processor to execute call processing.

With this configuration, when a subscriber or a large trunk makes a call or activates a call, it is possible to arbitrarily select a processor with a low usage rate (load) to execute the call processing program. This makes it possible to prevent the load from being applied only to the processor.

[Example] Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a block diagram of a multiprocessor storage program controlled exchange system according to an embodiment of the present invention.

In the figure, 1-1 to 1-n are subscriber control circuits, 2-
1 to 2-n is a processor (CPi), 3-1 to 3-
n is a subscriber. Note that each processor 2 is provided with an execution processor number management memory corresponding to the subscriber accommodation number and a processor usage rate management memory.

By the way, in conventional multiprocessor systems, if the originating subscriber (or large trunk) and the terminating subscriber (or outgoing trunk) are housed in different processors, the call processing program is executed by the processor on the originating side. The subscriber control on the called side or status change reporting from the called subscriber side is performed via the inter-processor communication bus.

Therefore, in the present invention, the load on the processors is distributed by applying the control logic on the receiving side to the calling side.

In the above configuration, normally when the subscriber 3-1 makes a call, the subscriber control circuit 2-1 reports the call to the processor 2-1. Then, the processor 2-1 acquires the call processing resource (CL M n ), and then the processor 2-1 executes the call processing program.

However, here, when subscriber 3-1 makes a call, the processor usage rate (occupancy rate) management memory is referred to, and the own processor is over the specified value (overload l (%) usage rate (X%)).
〉k%). If the value is greater than or equal to the specified value, the next process is performed.

First, the processor usage rate management memory is searched and the processor 2-n with the lowest usage rate is selected. However, in this case, if the other processor 2 is also 1 (% or more)
X%>k%), the own processor 2-1 is selected.

Next, the selected execution processor number is set in the execution processor number management memory provided for the subscriber,
A call report is sent to the corresponding processor along with the subscriber accommodation location (accommodation processor information).

On the other hand, on the execution processor side, the call processing resource n is captured, subscriber accommodating processor information is set in the call processing resource n, and then call processing is executed.

Note that from the call processing execution processor 2-n to the subscriber 3-1
This control is performed via an inter-processor communication bus based on the subscriber accommodating processor information set in the call processing resource n.

As described above, in this embodiment, when call information from an originating subscriber or an incoming trunk is entered manually, each of the multiprocessors is Determines the usage rate (occupancy rate) of the processor. Then, a call processing program is activated for a processor with a low usage rate.

At this time, the calling processor number and subscriber or trunk accommodation location information are also reported to the call processing execution processor.

As a result, the execution processor captures this information as its own processor's resources, sets it in the relevant resources, and executes the call processing program.

[Effects of the Invention] As explained above, the present invention provides a multiprocessor storage program controlled exchange system that is capable of reducing the probability of an abnormal overload state by effectively distributing the load in the multiprocessor system. It has the effect of being able to provide

In addition, if the amount of communication (traffic) per subscriber increases and processor processing capacity becomes insufficient, it will be possible to balance the load by simply adding more processors without changing the switching network equipment. It's also effective.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a multiprocessor storage program controlled exchange system according to an embodiment of the present invention. l: Subscriber control circuit 2: Processor 3: Subscriber

Claims (1)

[Claims] In a multiprocessor-type storage program controlled switching system having a plurality of subscriber control circuits and a plurality of processors controlling each subscriber control circuit, the processor includes processor usage rate management means for detecting the usage rate of each processor. and load distribution means for selecting a processor with a low usage rate based on the detection result by the processor usage rate management means when a call is initiated from the subscriber control circuit, and causing that processor to execute call processing. A multiprocessor storage program controlled exchange system characterized by: