JP6389149B2 - Call processing apparatus and operation method thereof - Google Patents

Description

  The present invention relates to a call processing apparatus capable of increasing the number of calls processed and an operation method thereof.

  In a conventional call processing device, congestion control is performed when the CPU load amount (referred to as CPU load amount) is larger than a threshold value (referred to as CPU load amount threshold). According to the congestion regulation, call processing is started only when the number of calls that have started processing from the point in time of unit time to the present time (the number of calls for processing start) is less than or equal to the call number threshold.

  FIG. 5 is a diagram illustrating how a surplus resource amount (referred to as a surplus CPU resource amount) is distributed in the CPU when the CPU load amount is equal to the CPU load amount threshold.

The call threshold is set to 5 when 6 calls can be processed due to the surplus CPU resource amount. In order to facilitate understanding, the number of calls will be described as being less than the actual number.
For example, when 5 call processing is started for a completed call and the number of processing start calls is 5, if processing of 1 completed call is started, all of the surplus CPU resource amount is used. However, the number of processing start calls is six, and further calls cannot be started.

JP 2014-155090 A JP 2002-44142 A

  In addition, when one complete call and four incomplete calls have started processing, and the number of processing start calls is 5, if one incomplete call is started, the number of processing start calls is 6 Therefore, it is impossible to start processing further calls.

  However, since the load applied to the CPU due to the incomplete call is smaller than the load applied to the CPU due to the completed call, all of the surplus CPU resource amount is not used, and an unused portion occurs. That is, for example, there is a problem that although a completed call can be started, the number of processing start calls is 6, so the processing is not started and a call cannot be made.

  In recent years, when a screening company intentionally generates a large number of incomplete calls, the above mechanism is often damaged, and the number of calls processed is often reduced. Actually, the CPU resource has an unused part and can handle the call, but apparently cannot process the call.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a call processing device capable of increasing the number of calls processed and an operation method thereof.

  The first aspect of the present invention is a call processing device for processing a call, and determines whether or not a CPU load amount indicating a load amount applied to a CPU of the call processing device is larger than a predetermined CPU load amount threshold value. CPU resource management unit (1), and the number of process completion calls for calculating the number of completed calls and the number of incomplete calls from the time when the CPU load amount becomes larger than the CPU load amount threshold to the time point that is a predetermined length backward A calculation unit (2), and a completed call number threshold storage unit (3) for storing a completed call number threshold indicating the number of completed calls determined to be processed per unit time when the CPU load amount is greater than the CPU load amount threshold When the CPU load amount is larger than the CPU load amount threshold, a coefficient that increases as the calculated number of completed calls decreases and increases as the calculated number of incomplete calls increases, and calculates the completion. Number of calls A call number threshold value calculation unit (4) that calculates the call number threshold value by adding the coefficient to the value, and when the CPU load amount is larger than the CPU load amount threshold value, processing is performed from the current time point to the time point that goes back the unit time. A process start call number calculation unit (5) for calculating a process start call number indicating the number of calls started, and when the CPU load amount is greater than the CPU load amount threshold, the process start call number is less than or equal to the call number threshold And a call processing unit (6) for starting the call processing only in the case of the above.

  The second aspect of the present invention is a method of operating a call processing device for processing a call, wherein the CPU resource management unit (1) of the call processing device indicates a load on the CPU of the call processing device. It is determined whether or not the amount is larger than a predetermined CPU load amount threshold value, and the processing end call number calculation unit (2) of the call processing device starts from when the CPU load amount becomes larger than the CPU load amount threshold value. When the number of completed calls and the number of uncompleted calls up to a predetermined point in time are calculated, and the call number threshold value calculation unit (4) of the call processing device has the CPU load amount larger than the CPU load amount threshold value A coefficient that increases as the calculated number of completed calls decreases and increases as the calculated number of incomplete calls increases, and when the CPU load amount is larger than the CPU load amount threshold, Can be processed The call threshold value is calculated by adding the coefficient to the completed call threshold value indicating the completed call count, and the CPU load amount is calculated by the processing start call number calculation unit (5) of the call processing device. In the case where it is larger than the threshold value, the processing start call number indicating the number of calls that have started processing from the current time point to the time point backed by the unit time is calculated, and the call processing unit (6) of the call processing device determines that the CPU load amount is Call processing is started when the number of processing start calls is equal to or less than the call number threshold when the CPU load amount threshold is greater.

  According to the call processing device and the operating method of the present invention, the number of calls processed can be increased.

It is a block diagram which shows the structure of the call processing apparatus which concerns on embodiment of this invention. It is a figure which shows the sequence of an incomplete call. It is a sequence diagram which shows the operation | movement method of a call processing apparatus. It is a figure which shows the mode of distribution of the total CPU resource amount which CPU can use for a process of a call. It is a figure which shows the mode of distribution of the surplus resource amount (surplus CPU resource amount) in CPU when CPU load amount is equal to CPU load amount threshold value.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a call processing device according to an embodiment of the present invention.
The call processing device is a device for processing a call, and includes a CPU resource management unit 1, a processing end call number calculation unit 2, a completed call number threshold storage unit 3, a call number threshold calculation unit 4, and a process start. A call number calculation unit 5 and a call processing unit 6 are provided.

  The CPU resource management unit 1 determines whether or not the CPU load amount indicating the load amount applied to the CPU (not shown) of the call processing device is larger than a predetermined CPU load amount threshold value.

  The processing end call number calculation unit 2 counts the number of completed calls (referred to as the number of completed calls) and the number of uncompleted calls from the time when the CPU load amount becomes larger than the CPU load amount threshold to the time point that reaches a predetermined length (referred to as the completed call number) Calculate the number of incomplete calls.

The completed call number threshold storage unit 3 stores a completed call number threshold indicating the number of completed calls determined to be processable per unit time when the CPU load amount is larger than the CPU load amount threshold value. Hereinafter, the unit time is 1 second.
The call threshold calculation unit 4 calculates a coefficient to be added to the completed call threshold, and calculates the call threshold by adding the coefficient to the completed call threshold when the CPU load is larger than the CPU load threshold. To do. The coefficient calculation method will be described later.

  The processing start call number calculation unit 5 calculates the number of processing start calls indicating the number of calls that have started processing up to a point one second (unit time) after the current time when the CPU load amount is greater than the CPU load amount threshold. .

  The call processing unit 6 starts the call processing only when the CPU load amount is greater than the CPU load amount threshold value and the number of processing start calls is equal to or less than the call number threshold value.

FIG. 2 is a diagram showing a sequence of incomplete calls.
In processing a call, first, a communication device on the transmission side (hereinafter referred to as a transmission side) transmits an INVITE signal to the call processing device. Call processing begins here. First, the call processing device transmits an INVITE signal to a communication device on the receiving side (hereinafter referred to as a receiving side).

Next, the receiving side transmits a 100 signal to the call processing device, and the call processing device transmits the 100 signal to the calling side.
Next, the receiving side transmits a 180 signal to the call processing device, and the call processing device transmits the 180 signal to the calling side.
Next, the calling side transmits a CANCEL signal to the call processing device, and the call processing device transmits the CANCEL signal to the receiving side.
Next, the receiving side transmits a 200 signal to the call processing device, and the call processing device transmits the 200 signal to the calling side.
Next, the receiving side transmits a 487 signal to the call processing device, and the call processing device transmits the 487 signal to the calling side.
Next, the transmission side transmits an ACK signal to the call processing device, and the call processing device transmits the ACK signal to the reception side.

  For example, if the time from when the call processing device transmits the INVITE signal to the receiving side until the call processing device transmits the CANCEL signal to the receiving side is less than 1 second, the call is an incomplete call. To do.

  FIG. 3 is a sequence diagram illustrating an operation method of the call processing device.

  The CPU resource management unit 1 determines whether or not the CPU load amount is larger than the CPU load amount threshold value (S1). If the CPU load amount is equal to or less than the CPU load amount threshold value (S1: NO), the CPU load management unit 1 performs the same determination. Is larger than the CPU load amount threshold value (S1: YES), the call number threshold value calculation unit 4 is notified (S3).

  When receiving the notification, the call number threshold value calculation unit 4 instructs the processing end call number calculation unit 2 to calculate the number of completed calls and the number of incomplete calls (S5).

  In response to the instruction, the processing end call number calculation unit 2 calculates the number of completed calls and the number of incomplete calls from the current time point to a time point that is a predetermined length backward (S7). The processing end call number calculation unit 2 distinguishes the number of completed calls and the number of incomplete calls according to the definition of FIG. 2 and stores them in the database in association with the call processing end time. In step S7, the processing is completed using the database. Calculate the number of calls and the number of incomplete calls. For example, the processing end call number calculation unit 2 calculates the number of completed calls and the number of incomplete calls for 10 seconds from the current time point to 10 seconds before. Then, the processing end call number calculation unit 2 notifies the call number threshold value calculation unit 4 of the calculated number of completed calls and the number of incomplete calls (S9).

Further, the call number threshold value calculation unit 4 reads the completed call number threshold value from the completed call number threshold value storage unit 3 (S11).
The call threshold calculation unit 4 calculates the coefficient to be integrated with the completed call threshold so that the coefficient increases as the number of completed calls decreases and increases as the number of uncompleted calls increases (S13).

For example, the call threshold calculation unit 4 calculates a coefficient by the following equation.
Coefficient = {M × (G + K)} / (M × G + N × K)

  However, M is the load applied to the CPU when processing one completed call, N is the load applied to the CPU when processing one uncompleted call, G is the calculated number of completed calls, and K is the calculated load The number of calls completed.

  For example, when M is 100, N is 60, G is 70,000, and K is 30,000, the coefficient is (100 × 100,000) / (100 × 70,000 + 60 × 30,000) = 1.1364.

  Note that the coefficient need not be based on the above formula as long as the number of completed calls is small and the coefficient is large as the number of incomplete calls is large. For example, the coefficient may be calculated without using the load (M, N) applied to the CPU when processing one call.

  Next, the call number threshold value calculation unit 4 adds the coefficients to the completed call number threshold value, and obtains the integration result (this is called the call number threshold value) (S15).

  For example, when the completed call count threshold is 100 and the coefficient is 1.1364, the call count threshold is 100 × 1.1364 = 113.64.

Next, the call count threshold calculation unit 4 notifies the call processing unit 6 of the call count threshold (S17).
The call processing unit 6 that has received the call threshold value determines whether or not a new INVITE signal has been received (S21). If a new INVITE signal has not been received (S21: NO), the same determination is made. If the INVITE signal is received (S21: YES), the process start call number calculation unit 5 is instructed to calculate the process start call number (S23).

  In response to the instruction, the processing start call number calculation unit 5 calculates the number of processing start calls indicating the number of calls that have started processing up to a time point 1 second (unit time) after the current time point (S25). For example, the INVITE signal received up to the time point that is 1 second (unit time) backward from the current time point can be set as the number of processing start calls.

The processing start call number calculation unit 5 notifies the call processing unit 6 of the calculated number of processing start calls (S27).
The call processing unit 6 that has received the number of processing start calls determines whether or not the number of processing start calls is less than or equal to a call number threshold (S29). Call processing is started for the INVITE signal (S31), and the process returns to step S21. As shown in FIG. 2, the call processing starts by transmitting an INVITE signal to the receiving side.

  After that, if it is determined that the CPU load amount is equal to or less than the CPU load amount threshold value (S1: NO), the call processing is started without passing through steps S23 to S29 (S31).

  FIG. 4 is a diagram showing how the amount of resources (referred to as the total CPU resource amount) that the CPU can use for call processing is distributed.

  The total CPU resource amount can be considered by dividing it into a resource amount corresponding to the CPU load amount threshold and a surplus resource amount (excess CPU resource amount) when the resource amount is used.

  As shown on the left side of the figure, the completed call count threshold is equal to the number of completed calls when the entire CPU resource amount including the surplus CPU resource amount is used only for processing completed calls.

However, as shown on the right side of the figure, the total CPU resource amount is used for processing completed calls and incomplete calls.
For example, if the resource amount corresponding to the CPU load amount threshold is used for a completed call and an incomplete call and the ratio is 8: 2, if the surplus CPU resource amount is also used at 8: 2, the total CPU resource All is used without waste.

  The call threshold value calculated by the call threshold calculation unit 4 is equal to the total number of completed calls and incomplete calls when the entire CPU resource amount is used at such a ratio.

  That is, by calculating the call threshold value in this way, the entire CPU resource amount can be ideally used without waste. Thereby, the number of calls processed can be increased. Also, it is not ideal. For example, even when the percentage of completed calls increases, the call threshold is higher than the completed call threshold, so compared with the case where the completed call threshold is used (the coefficient is not integrated). The number of calls processed can be increased.

  A computer program for causing a computer to function as the call processing device of the present embodiment can be recorded on a computer-readable recording medium such as a semiconductor memory, a magnetic disk, an optical disk, a magneto-optical disk, a magnetic tape, and the Internet. It can be widely distributed by being transmitted through a communication network such as

DESCRIPTION OF SYMBOLS 1 CPU resource management part 2 Process completion call number calculation part 3 Completion call number threshold value memory | storage part 4 Call number threshold value calculation part 5 Process start call number calculation part 6 Call processing part

Claims (4)

A call processing device for processing a call,
A CPU resource management unit (1) for determining whether or not a CPU load amount indicating a load amount applied to the CPU of the call processing device is larger than a predetermined CPU load amount threshold;
A process end call number calculation unit (2) for calculating the number of completed calls and the number of uncompleted calls from the time when the CPU load amount becomes larger than the CPU load amount threshold to a predetermined time point;
A completed call number threshold storage unit (3) for storing a completed call number threshold indicating the number of completed calls determined to be processable per unit time when the CPU load amount is greater than the CPU load amount threshold;
When the CPU load amount is larger than the CPU load amount threshold, a coefficient that increases as the calculated number of completed calls decreases and increases as the calculated number of incomplete calls increases, and calculates the number of completed calls A call threshold calculation unit (4) for calculating the call threshold by adding the coefficient to the threshold;
A processing start call number calculation unit (5) for calculating a processing start call number indicating the number of calls that have started processing from the current time point to the time point that is a unit time backward when the CPU load amount is greater than the CPU load amount threshold value; ,
A call processing unit (6) for starting a call processing only when the CPU load amount is larger than the CPU load amount threshold value and the number of calls to be processed is equal to or less than the call number threshold value. Processing equipment. The coefficient is
Coefficient = {M × (G + K)} / (M × G + N × K)
Meet,
Where M is the amount of load applied to the CPU when processing one completed call, N is the amount of load applied to the CPU when processing one uncompleted call, G is the calculated number of completed calls, and K is calculated The call processing device according to claim 1, wherein the number of incomplete calls. An operation method of a call processing device for processing a call,
The CPU resource management unit (1) of the call processing device determines whether or not a CPU load amount indicating a load amount applied to the CPU of the call processing device is larger than a predetermined CPU load amount threshold value,
The number of completed calls and the number of uncompleted calls from the time when the CPU load amount becomes larger than the CPU load amount threshold to the time point determined by the predetermined time from the time when the CPU load amount becomes larger than the CPU load amount threshold value. Calculate
When the CPU load amount is larger than the CPU load amount threshold, the call number threshold value calculation unit (4) of the call processing device increases as the calculated number of completed calls decreases, and the calculated incomplete call. A coefficient that increases as the number increases is calculated, and when the CPU load amount is larger than the CPU load amount threshold value, the coefficient is added to the completed call number threshold value indicating the number of completed calls determined to be processed per unit time. Calculate the number threshold,
A process indicating the number of calls started by the processing start call number calculation unit (5) of the call processing device from the current time point to the time point backed by the unit time when the CPU load amount is larger than the CPU load amount threshold value. Calculate the number of calls initiated,
The call processing unit (6) of the call processing device starts call processing when the CPU load amount is greater than the CPU load amount threshold value and the number of calls to be processed is equal to or less than the call number threshold value. An operation method of the call processing apparatus. The coefficient is
Coefficient = {M × (G + K)} / (M × G + N × K)
Meet,
Where M is the amount of load applied to the CPU when processing one completed call, N is the amount of load applied to the CPU when processing one incomplete call, G is the calculated number of completed calls, and K is the calculated amount The operation method of the call processing device according to claim 3, wherein the number of incomplete calls.

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