JP4356933B2 - Call setting request restriction method, restriction device, and program therefor - Google Patents

Description

The present invention relates to a call setup request regulation technique, and more particularly, a regulation method for regulating a call setup request of an application for setting a session including at least a telephone in an IP network such as a VoIP (Voice over IP) network, and a program therefor about the.

  First, call setting restrictions in conventional congestion control of a telephone network will be described. Congestion in the telephone network is mostly due to congestion in the incoming system to a specific area or a specific subscriber. Therefore, the congestion control system is usually made for the purpose of controlling the incoming call system congestion.

  In the following, the information network technology handbook editorial committee edition "Information and communication technology handbook" pp.87-89 (December 20, 1987, published by Ohmsha) (Non-Patent Document 1), restrictions on call setting of the telephone network. An example will be described.

  FIG. 7 is a system configuration diagram of the conventional telephone network congestion control system disclosed in Patent Document 1. In FIG.

  In the figure, for the subscriber congestion, the subscribers are detected by extracting and classifying the numbers of busy subscribers with the subscriber line switch (LS), and installed in the central office area (DA). The subscriber number is sent to the subscriber congestion control unit.

  The control unit sends the regulated subscriber number and the regulation rate to the subscriber line switch (LS) in the central station area (DA) and the control unit in the adjacent central station area (DA). The incoming call number is identified by a ground identification restriction device of each subscriber line switch (LS), and a call to the subscriber is restricted.

  For local congestion, when congestion is detected by the toll-switched telephone exchange (TIS), the toll-number of the toll-switching telephone exchange (TIS) is transferred to the local congestion control unit installed in the general control station area.

  The control unit sends out the regulated long-distance number and the restriction rate to the toll transmission switch (TOS) and other control units in the central office area, and to the area identification control device of the toll switch (TOS) Restrict calls.

Information and Communication Technology Handbook Editorial Committee “Information and Communication Technology Handbook” pp.87-89 (December 20, 1987, published by Ohmsha)

  In the case of the telephone network described in the above prior art, the problem congestion is incoming congestion, and congestion due to a large number of calls from a specific terminal has not been a problem. For this reason, the congestion control system is also designed to handle only incoming congestion, and no consideration has been given to outgoing congestion.

  However, in the case of an application that sets up a session including at least a telephone in an IP network, a large number of calls can be made from a specific terminal due to the high functionality of the terminal, and congestion may occur due to the large number of calls.

  However, in the current congestion system in the telephone network, the structure of the IP network and the network are different, so it cannot be applied as it is, and even if it is remade for the IP network, it is not possible to deal with outgoing congestion. It was impossible.

  In order to regulate terminals that make a large number of calls, it is necessary to identify the terminals that make a large number of calls. In order to identify a terminal that makes a large number of calls, signals from all transmitting terminals must be recorded. However, there is a problem that a large amount of memory is required to record all signals.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems, specify a terminal that makes a large number of calls without requiring a large amount of memory capacity, and a restriction method and a restriction device for restricting call setting requests therefrom And providing a program for it.

The present invention employs the following configuration in order to achieve the above object.
(1) The regulation method of the present invention is a regulation method for a call setup request for an application that sets up a session in an IP network, and the number of calls made by a calling terminal continuously exceeding a predetermined threshold ( An initialization step for initializing the number of continuous postings in the restricted list to be registered corresponding to the address ( calling address) of the calling terminal (hereinafter referred to as “number of continuous postings”), and requests sent from a plurality of terminals In contrast, a measurement step for measuring the number of packets ( call volume ) for establishing a call setting that arrives within a predetermined time t for each calling address of the call source terminal , and the time t if the number of packets per measured origination address within exceeds the threshold value, referring to the restricted list, emitting address if origination address beyond the threshold value is not in the restricted list In addition, regardless of the already or was not or emitting address is found in the regulation target list, 1 is added to the continuous me number of times, to identify the terminal to be subject to regulation by the origination address that is registered in the regulation target list terminal Specified by the identifying step, the originating address deleting step of deleting the originating address from the restricted list when the originating address not measured within the time t is in the restricted list, and the terminal identifying step. A restriction rate determining step for determining a restriction rate for restricting outgoing calls from a terminal based on the number of packets (call volume) measured within the time t for each period or the number of continuous postings; after the determined time t, the restriction duration time to further regulations in the determined control rate constant predetermined duration, or, a predetermined Several and restriction duration time determining step of the selected duration per period from the duration, the restriction rate determination restriction duration time determined at the determined control rate and the restriction duration time determining step in step And a restriction step for restricting outgoing calls from the terminal specified in the terminal specifying step, and a restriction release step for releasing the restriction after the restriction continuation time.

( 2 ) In the above, the selection of the duration performed for each period from the plurality of predetermined durations is performed by selecting the number of packets ( call volume) measured within the time t for each period. ) Or the number of consecutive postings.

(3) In the above, the start and end of the measurement, characterized in that it is performed upon request from the call setup server.

( 4 ) The restriction device according to the present invention is a restriction device for a call setting request for an application for setting a session in an IP network, and the number of times a call is continuously made from a calling terminal exceeding a predetermined threshold ( Initialization means for initializing the number of continuous postings in the restricted list to be registered in correspondence with the address ( calling address) of the calling terminal (hereinafter referred to as the “number of continuous postings”), and requests sent from a plurality of terminals Measuring means for measuring the number of packets ( call volume ) for establishing a call setting that arrives within a predetermined time t for each calling address of the call source terminal , and the time t If the number of packets for each source address measured within exceeds the threshold, refer to the restriction target list, if the source address exceeding the threshold is not in the restriction target list, add the source address, The Regardless of the control target list to or it was not already or emitting address is there, 1 is added to the continuous me number of times, and the terminal identification means for identifying a terminal to be subject to regulation by the origination address that is registered in the regulation target list , when the origination address that has not been measured in the time t was in the restricted list, the originating address deletion means for deleting emitting address from the restraint target list, the terminal identified by the terminal identifying means A restriction rate determining means for determining a restriction rate for restricting outgoing calls based on the number of packets (call volume) measured within the time t for each period or the number of consecutive postings, and the predetermined rate After time t, a regulation continuation time for continuing the regulation at the decided regulation rate is set to a predetermined constant duration or a plurality of predetermined durations for each period. Identified in the restriction duration time determining means to selected duration, the restriction rate determination unit determined by the restriction rate and the restriction duration time determining means and said terminal identifying means based on the restriction duration time determined by the and regulating means for regulating a call from the terminal was characterized by having a restriction releasing means for releasing the restriction after the restriction duration time.

(5) In the above, the selection of the duration that is performed for each period from the plurality of predetermined durations is performed by selecting the number of packets ( call volume) measured within the time t for each period. ) Or the number of consecutive postings.

(6) In the above, the start and end of the measurement, characterized in that it is performed upon request from the call setup server.

  The program of the present invention is a program for restricting a call setting request for causing a computer to function as each means in the restriction device.

  According to the present invention, the memory required for specifying terminals that are making a large number of calls is limited to a memory that stores information on calls that arrive within a short measurement time t and a memory that is required for the restriction target list. Furthermore, since the amount of restriction is determined according to the number of continuous postings in the restriction target list, the amount of calls, etc., there is an effect that fine restriction can be performed.

A feature of the present invention is that, in the technology related to a large volume call restriction from a specific terminal in an IP network, a means for measuring the call volume per unit time, and when the measured call volume exceeds a threshold, And a means for recording the call origination address in the restriction target list and a restriction means for restricting the call setting request for the call origination address continuously posted in the restriction target list a certain number of times.
Hereinafter, a regulating method according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic configuration diagram for explaining the positioning of a restriction device for a call setting request in this embodiment in a network.

  In the figure, there are four terminals, terminal 1A (11), terminal 2A (12), terminal 1B (21), and terminal 2B (22), and when terminal 1A (11) and terminal 2A (12) are set up for a call. The call setting server A (15) is used when the terminal 1B (21) and the terminal 2B (22) use the call setting server B (25) to set up a call.

  The terminal 1A (11), the terminal 2A (12), the terminal 1B (21), and the terminal 2B (22) may be any information terminal or communication terminal capable of packet communication. 11) and terminal 1B (21) are telephones, and terminal 2A (12) and terminal 2B (22) are personal computers (PCs).

  A packet transmitted from the terminal 1A (11) or the terminal 2A (12) is transferred through the router (13) in the IP network (20). For an application that requires call setting, a packet for call setting establishment is delivered to the call setting server A (15), and call setting is performed by the call setting server A (15).

  On the other hand, a packet transmitted from the terminal 1B (21) or the terminal 2B (22) is transferred through the IP network (20) via the router (23). For an application that requires call setting, a packet for call setting establishment is delivered to the call setting server B (25), and call setting is performed by the call setting server B (25).

  The restriction device according to the present invention is provided corresponding to each call setting server, and the restriction restriction is performed by the restriction device, which is a feature of the present invention.

  In FIG. 1, a restriction device A (14) is provided corresponding to the call setting server A (15), and a restriction device B (24) is provided corresponding to the call setting server B (25). However, the restriction device can be realized as one module of the call setting server, that is, the restriction device can be realized as an internal configuration of the call setting server.

  FIG. 3 is a block diagram of the regulating device 30 (that is, corresponding to the regulating device A (14) or the regulating device B (24) in FIG. 2).

  As shown in the figure, the restriction device 30 is connected to the call setting server 40 (as described above, the restriction device may be incorporated inside as a part of the call setting server), the measurement unit 31, the restriction target It comprises a list creation / update unit 32, a control unit 33, and a regulation execution unit 34.

  An outline of the function of the restriction device 30 will be described. The call amount of the packet for establishing the call setting per unit time is measured by the measurement unit 31, and the measured call amount is determined by the restriction target list creation / update unit 32. When the threshold is exceeded, the call origination address is recorded and updated in the restriction target list as a restriction target, and the call setting request from the call origination address continuously posted in the restriction target list by the restriction execution unit 34 is restricted. It is what you do.

  The regulation device 30 according to the present invention has a normal computer configuration (the hardware configuration of the computer is omitted in FIG. 3) composed of hardware such as a CPU, a memory, an external storage device (such as a hard disk device), and a display device. The measurement unit 31, the regulation target list creation / update unit 32, the control unit 33, the regulation execution unit 34, and the like are realized by executing corresponding programs on the CPU.

  When the restriction device 30 is incorporated as a part of the call setting server, the measurement unit 31, the restriction target list creating / updating unit 32, the control unit 33, the restriction implementation using the CPU and memory of the call setting server. Needless to say, a program corresponding to the unit 34 is executed. As will be described later, these programs can be installed in a computer constituting a call setting server or a regulation device via a recording medium such as a CD-ROM, DVD, or FD, or a network such as the Internet.

  FIG. 4 is a flowchart showing an example of a processing operation of the call setting request restriction method performed by the restriction device 30 according to the present invention. Hereinafter, a processing operation example in the regulating device will be described along the flowchart of FIG.

Consider a situation where a large number of calls are made from the terminal 1A (11).
At this time, it is assumed that a large amount of packets for establishing call settings are sent from the terminal 2A (12) into the network. The packet for establishing the call setting is delivered to the call setting server A (15) via the restriction device A (14). The call setting server A (15) determines the processing load, and when it is determined that the processing load is larger than a predetermined value, the number of packets (call volume) for establishing the call setting for the regulation device A (14) Request measurement start.

  When the call setting server A (15) requests the restriction device A (14) (more specifically, the control unit 33 in FIG. 3) to start measurement (step S1 in FIG. 4), the restriction device A creates and updates the restriction target list. The unit 32 initializes the number of continuous postings in the restriction target list to 0 (step S2 in FIG. 4).

  Next, the measurement unit 31 in FIG. 3 performs measurement only for time t, and counts the packets for call setup establishment that arrive during that time for each calling address (step S3 in FIG. 4; If the number of packets counted for each calling address does not exceed a predetermined threshold (step S4: N in FIG. 4), the calling address is not included in the restriction target list. It discards without adding (step S6 of FIG. 4), it progresses to the process of step S10, and if there is no measurement end request from a call setting server (step S10: N), it will return to the process of step S3 of FIG. If there is (step S10: Y), the process is terminated. The determination in step S4 may be performed by the control unit 33 or may be performed by the restriction target list creation / update unit 32.

  On the other hand, if the number of packets counted for each source address exceeds a predetermined threshold (step S4: Y), the source address is set in the target list in the target list creation / update unit 32 of FIG. In addition, the number of consecutive postings is incremented by 1 regardless of whether the address already exists in the restriction target list (step S5 in FIG. 4; the step of identifying the terminal subject to restriction in the claims or Equivalent to means).

  Next, in the restriction target list creating / updating unit 32 of FIG. 3, if there is an outgoing address in the restriction target list that has not been observed within the current measurement time t, it is deleted from the restriction target list (FIG. 3). 4 step S7). FIG. 5 is a diagram showing an example of the restriction target list according to the present invention.

  Next, the regulation execution unit 34 in FIG. 3 starts regulation based on the regulation target list (step S8 in FIG. 4: equivalent to the step or means of regulation in the claims).

  Note that the regulation duration is determined according to the number of consecutive postings. In addition, a restriction rate (a ratio of restricting packets for establishing call settings that have arrived) may be determined according to the number of packets for establishing call settings that have arrived within the measurement time t. That is, the restriction continuation time T is increased when the number of continuous postings is large, and the restriction rate R is increased when the number of packets for establishing call settings is large.

  FIG. 6 is a diagram for explaining the above-described regulation method. FIG. 6A shows an example of regulation duration T determined for the number of continuous postings, and FIG. An example of the restriction rate determined for the number of packets for establishing the call setting that arrived within the measurement time t is shown. FIG. 6 shows an example in which the number of consecutive postings (see (a) in the figure) and the number of packets for establishing call settings (see (b) in the same figure) that arrive within the measurement time t are divided into three stages. However, the number of stages is arbitrary.

  The example in FIG. 6A is an example in which the restriction duration is determined based on the number of continuous postings. However, the restriction duration may be determined based on the number of packets for establishing call settings that arrive within the measurement time t. Good.

  The example of FIG. 6B is an example in which the restriction rate is determined by the number of packets for establishing the call setting that arrived within the measurement time t, but may be determined based on the number of consecutive postings.

  Furthermore, both the regulation continuation time and the regulation rate may be determined by a predetermined combination of the number of packets for call setting establishment that arrived within the measurement time t and the number of continuous postings (see above, claims) Equivalent to a step or means for determining the regulation rate and a step or means for determining the regulation duration).

  After the measurement, it is determined whether T time has elapsed (step S9 in FIG. 4). Here, T may be constant or may be varied.

  If T is fixed, the implementation (configuration) becomes simple. However, if the terminal side intentionally changes the timing and generates a packet for call setup establishment, measurement is performed. There is a possibility that the originating address cannot be observed within the time t, and regulation is not applied.

  On the other hand, when T is varied, the implementation (configuration) is complicated, but there is an advantage that the possibility that the originating address cannot be observed within the measurement time t pointed out earlier can be reduced. is there.

  If there is no measurement termination request from the call setting server even after the time T has elapsed (step S9: Y, step S10: N), the processing returns to step S3 in FIG. 4 and if there is a measurement termination request (step S10: Y). The process is terminated (corresponding to claims 6 and 12 in the claims).

  In the present invention, the measurement is started by the restriction device 34 in response to a request from the call setting server, and the measurement in the restriction device is ended by a measurement end request from the call setting server, but there is no request from the call setting server. In addition, a mode in which measurement is always performed by the regulation device 34 is also possible.

  In that case, the restriction is automatically canceled if a predetermined restriction continuation time has passed and then there is no further restriction continuation (the step or means for releasing the restriction in the claims). Equivalent).

  As a result, there is no measurement start request or measurement end request from the call setting server, and even in the case of constant measurement, the restriction is automatically released by stopping a large number of calls from the terminal.

  Further, each process shown in the flowchart of FIG. 4 performed by the measurement unit 31, the regulation target list creation / update unit 32, the control unit 33, and the regulation execution unit 34 in the regulation device 30 according to the present invention is executed by a corresponding program. It is done by executing. This program is obtained by converting the processing shown in the flowchart of FIG. 4 into a program code. The program is stored in a recording medium such as a CD-ROM, DVD, or FD and distributed to users via a network such as the Internet. Can spread.

It is a schematic block diagram for demonstrating the positioning of the control apparatus of the call setting request | requirement of this invention. It is a measurement conceptual diagram for the identification of mass calling terminals according to the present invention. It is a block diagram of the restriction | limiting apparatus of the call setting request | requirement based on this invention. It is a flowchart which shows one processing operation example of the control method of the call setting request | requirement based on this invention. It is a figure which shows an example of the control object list | wrist which concerns on this invention. It is a figure for demonstrating the method of the regulation which concerns on this invention. It is a figure for demonstrating the congestion setting system of the conventional telephone network.

Explanation of symbols

11: Terminal 1A
12: Terminal 2A
13: Router 14: Regulatory device A
15: Call setting server A
20: IP network 21: Terminal 1B
22: Terminal 2B
23: Router 24: Regulatory device B
25: Call setting server B
30: Restriction device 31: Measurement unit 32: Restriction target list creation / update unit 33: Setting unit 34: Restriction execution unit 40: Call setting server

Claims (7)

A method for restricting a call setting request of an application for setting a session in an IP network,
Number of consecutive postings in the restriction target list in which the number of calls made from a calling terminal continuously exceeding a predetermined threshold (hereinafter referred to as continuous posting count) is registered corresponding to the address of the calling terminal (calling address) An initialization step for initializing to zero,
Measurement for measuring the number of packets ( call volume ) for establishing a call setting that arrives within a predetermined time t in response to requests originated from a plurality of terminals , for each calling address of the calling terminal. Steps,
When the number of packets for each source address measured within the time t by the measurement step exceeds the threshold, the restriction target list is referred to, and if the source address exceeding the threshold is not in the restriction target list Regardless of whether the source address is already present in the restriction target list or not, one is added to the number of consecutive postings, and the terminal is subject to restriction by the source address registered in the restriction target list A terminal identification step for identifying
A source address deletion step of deleting the source address from the target list when the source address not measured within the time t is in the target list;
Regulations that determine the regulation rate for restricting the call from the terminal identified by the terminal identification step, the time the number of packets measured in t of each cycle (call volume) or on the basis of the continuous web count Rate determination step;
After the predetermined time t, a regulation continuation time for continuing the regulation at the decided regulation rate is selected from a predetermined constant duration or a plurality of predetermined durations. A regulation duration determination step to be a duration selected for each cycle ;
A regulation step of regulating outgoing calls from the terminal identified in the terminal identification step based on the regulation rate determined in the regulation rate determination step and the regulation duration determined in the regulation duration determination step ;
And a restriction release step for releasing the restriction after the restriction continuation time. In the call setting request regulating method according to claim 1 ,
In the regulation duration determination step, the selection of the duration that is performed for each period from among a plurality of predetermined durations is the number of packets ( call volume ) measured within the time t for each period. Alternatively, the call setting request regulation method is performed based on the number of continuous postings. The call setting request regulation method according to claim 1 or 2 ,
The start and end of measurement in the measurement step is performed by a request from a call setting server. A device for restricting a call setting request of an application for setting a session in an IP network,
Number of consecutive postings in the restriction target list in which the number of calls made from a calling terminal continuously exceeding a predetermined threshold (hereinafter referred to as continuous posting count) is registered corresponding to the address of the calling terminal (calling address) Initialization means for initializing to zero,
Measurement for measuring the number of packets ( call volume ) for establishing a call setting that arrives within a predetermined time t in response to requests originated from a plurality of terminals , for each calling address of the calling terminal. Means,
When the number of packets for each source address measured within the time t by the measuring unit exceeds the threshold, the restriction target list is referred to, and if the source address exceeding the threshold is not in the restriction target list Regardless of whether the source address is already present in the restriction target list or not, one is added to the number of consecutive postings, and the terminal is subject to restriction by the source address registered in the restriction target list A terminal identification means for identifying
A calling address deletion means for deleting the calling address from the restricted list when the originating address not measured within the time t is in the restricted list;
The control rate for restricting the call from the terminal identified by said terminal identification unit, the time the number of packets measured in t of each cycle (call volume) or regulations be determined based on the continuous web count Rate determination means;
After the predetermined time t, a regulation continuation time for continuing the regulation at the decided regulation rate is selected from a predetermined constant duration or a plurality of predetermined durations. A regulation duration determination means for setting a duration selected for each cycle ;
Restriction means for restricting outgoing calls from the terminal identified by the terminal identification means based on the restriction rate determined by the restriction rate determination means and the restriction duration determined by the restriction duration determination means;
And a restriction release unit for releasing the restriction after the restriction continuation time. In the call setting request regulating device according to claim 4 ,
In the regulation duration determination means, the selection of the duration that is performed for each period from among a plurality of predetermined durations is the number of packets ( call volume ) measured within the time t for each period. Alternatively, the call setting request restricting device is performed based on the number of continuous postings. In the restriction device for call setting request according to claim 4 or 5 ,
The call setting request restricting device, wherein the measurement means starts and ends measurement upon request from a call setting server. A call setting request restricting program for causing a computer to function as each means in the call setting request restricting device according to any one of claims 4 to 6 .

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