WO2004098135A1 - Traffic control device, traffic control program, program recording medium, and traffic control method - Google Patents

Traffic control device, traffic control program, program recording medium, and traffic control method Download PDF

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Publication number
WO2004098135A1
WO2004098135A1 PCT/JP2004/004340 JP2004004340W WO2004098135A1 WO 2004098135 A1 WO2004098135 A1 WO 2004098135A1 JP 2004004340 W JP2004004340 W JP 2004004340W WO 2004098135 A1 WO2004098135 A1 WO 2004098135A1
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WO
WIPO (PCT)
Prior art keywords
control
congestion
call
traffic
information
Prior art date
Application number
PCT/JP2004/004340
Other languages
French (fr)
Japanese (ja)
Inventor
Tomoki Kawakami
Tsukasa Miyajima
Tetsuhiko Takashina
Hiroki Takeshita
Eiji Tanaka
Takashi Kani
Katsuyuki Miyakoshi
Satoshi Izumi
Original Assignee
Ntt Comware Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ntt Comware Corporation filed Critical Ntt Comware Corporation
Publication of WO2004098135A1 publication Critical patent/WO2004098135A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/29—Flow control; Congestion control using a combination of thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
    • H04L47/266—Stopping or restarting the source, e.g. X-on or X-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer

Definitions

  • a traffic control device a traffic control program, a program recording medium, and a traffic control method
  • the present invention relates to a traffic control device for controlling traffic to eliminate or prevent congestion in a communication network such as an IP network, a traffic control program, a program recording medium, and a traffic control method.
  • a communication network such as an IP network, a traffic control program, a program recording medium, and a traffic control method.
  • an object of the present invention is to provide a traffic control device, a traffic control program, a program recording medium, and a traffic control method capable of reducing costs and accurately controlling traffic.
  • a traffic control device is a traffic control device that controls traffic in order to eliminate congestion in a communication network, the signal control device extracting a call control signal transmitted / received on the communication network. Means and the extracted call control signals are analyzed to determine the number of call connections per unit time to the subscriber. Signal analysis means for measuring the number of uncompleted calls and the measured number of uncompleted calls, and comparing the measured number of uncompleted calls with a predetermined threshold value, and determining whether or not congestion has occurred based on the comparison result. If it is determined that congestion has occurred, determine the amount of control in controlling the number of call connections, and generate congestion control information that includes the amount of control and information to identify the subscriber. And at least one call connection control means for analyzing the congestion control information and performing a call loss process on the call to the subscriber based on the control amount to control the number of call connections. Have.
  • the traffic control device when a plurality of call connection control means are provided, a call to receive congestion control information from the congestion determination means and to control the number of call connections based on the congestion control information is provided.
  • the traffic control device may include a congestion control management unit that specifies connection control means and transmits congestion control information to the specified call connection control means.
  • a congestion control management unit specifies connection control means and transmits congestion control information to the specified call connection control means.
  • the call connection control means generates an instruction response signal indicating that the number of call connections has been controlled, and monitors traffic in the communication network.
  • the congestion control management means receives the instruction response signal and the traffic information from the call connection control means, and receives the received instruction response signal and the traffic information. Based on the control status information, the congestion determination means receives and stores the control status information from the congestion control management means, and determines whether or not congestion has occurred. You may use situation information.
  • a traffic control device is a traffic control device for controlling traffic in order to prevent congestion in a communication network, comprising a signal for extracting a call control signal transmitted and received on the communication network.
  • Extraction means signal analysis means for analyzing the extracted call control signal and measuring the number of call connections per unit time and the number of incomplete calls to the subscriber, and a signal analysis means for measuring the number of incomplete calls and Threshold and Are compared based on the comparison result, and whether or not a sign of congestion is occurring is determined.If the result of the determination is that a sign of congestion is occurring, the number of call connections is controlled.
  • Congestion determination means for determining congestion control information including information for specifying the control amount and the subscriber, analyzing the congestion control information, and calling the subscriber based on the control amount. And has at least one call connection control means for controlling the number of call connections by performing a call loss process.
  • the traffic control device when a plurality of call connection control means are provided, a call to receive congestion control information from the congestion determination means and to control the number of call connections based on the congestion control information is provided.
  • the traffic control device may include a congestion control management unit that specifies connection control means and transmits congestion control information to the specified call connection control means. When it is determined that a plurality of signs of congestion have occurred, and when congestion to be preferentially eliminated or prevented is determined, a priority order among the plurality of signs of congestion is determined; The priority may be used in determining the control amount.
  • the call connection control means generates an instruction response signal indicating that the number of call connections has been controlled, and monitors traffic in the communication network.
  • the congestion control management means receives the instruction response signal and the traffic information from the call connection control means, and receives the received instruction response signal and traffic.
  • the control status information is generated based on the control information, and the congestion determination unit receives and stores the control status information from the congestion control management unit, and determines whether or not a sign of congestion has occurred.
  • the accumulated control status information may be used.
  • a traffic control program is a traffic control program used in a traffic control device that controls traffic in order to eliminate congestion in a communication network.
  • Signal extracting means for extracting a call control signal transmitted / received in the above, signal analyzing means for analyzing the extracted call control signal, and measuring the number of call connections per unit time to the subscriber and the number of incomplete calls; Ratio of the measured number of incomplete calls to a predetermined threshold And determines whether or not congestion is occurring based on the comparison result. If the result of the determination is that congestion is occurring, the control amount for controlling the number of call connections is determined.
  • Congestion determination means for generating congestion control information including information for specifying a control amount and a subscriber; analyzing the congestion control information; and performing a call loss for a call to a subscriber based on the control amount. By performing the processing, it functions as at least one call connection control unit that controls the number of call connections.
  • the traffic control device when the traffic control device has a plurality of call connection control means, the traffic control device receives congestion control information from the congestion determination means, and Alternatively, the call connection control means for controlling the number of call connections may be specified, and the call connection control means may function as congestion control management means for transmitting congestion control information to the specified call connection control means.
  • a traffic control program is a traffic control program used in a traffic control device that controls traffic in order to prevent congestion in a communication network, and that transmits and receives the traffic control device on a communication network.
  • Signal extracting means for extracting a call control signal to be transmitted
  • signal analyzing means for analyzing the extracted call control signal, and measuring the number of call connections per unit time and the number of incomplete calls to the subscriber.
  • the number of uncompleted calls is compared with a predetermined threshold value, and it is determined whether or not a sign of congestion is occurring based on the comparison result.As a result of the determination, it is determined that a sign of congestion is occurring.
  • the control amount for controlling the number of call connections is determined, and congestion control information including the control amount and information for identifying the subscriber is generated.
  • Congestion determination means to be formed and at least one call connection control for analyzing the congestion control information and controlling the number of call connections by performing a call loss process for a call to a subscriber based on the control amount. Function as a means.
  • the traffic control device when the traffic control device has a plurality of call connection control means, the traffic control device receives congestion control information from the congestion determination means, and Alternatively, the call connection control means for controlling the number of call connections may be specified, and the call connection control means may function as congestion control management means for transmitting congestion control information to the specified call connection control means.
  • the program recording medium is used in a communication network.
  • Congestion determination means for determining congestion control information including information for specifying the control amount and the subscriber, and analyzing the congestion control information and determining the congestion control information based on the control amount. Records a traffic control program to function as a single call connection control unit even without least control the re call ⁇ number of connections by the performing the call loss processing the call to a subscriber.
  • the traffic control apparatus when the traffic control program has a plurality of call connection control means, the traffic control apparatus receives congestion control information from the congestion determination means,
  • the call connection control means for controlling the number of call connections based on the congestion control information may be specified, and the function may function as congestion control management means for transmitting the congestion control information to the specified call connection control means. .
  • a program recording medium is a program recording medium that records a traffic control program used in a traffic control device that controls traffic in order to prevent congestion in a communication network.
  • a signal extraction means for extracting a call control signal transmitted and received on the communication network, and analyzing the extracted call control signal to determine the number of calls connected per unit time to the subscriber and the number of incomplete calls.
  • the signal analysis means for measuring the number of incomplete calls is compared with the measured number of incomplete calls and a predetermined threshold value, and it is determined whether or not a sign of congestion is occurring based on the comparison result. If it is determined that the sign is occurring, the control amount for controlling the number of call connections is determined, and the control amount and information for identifying the subscriber are determined.
  • Congestion determination means for generating congestion control information including the number of call connections by analyzing congestion control information and performing call loss processing for calls to subscribers based on the control amount It records a traffic control program that functions as at least one call connection control means for controlling traffic.
  • the traffic control program when the traffic control device has a plurality of call connection control means, the traffic control program receives the congestion control information from the congestion determination means,
  • the call connection control means for controlling the number of call connections based on the congestion control information may be specified, and the function may function as congestion control management means for transmitting the congestion control information to the specified call connection control means. .
  • a traffic control method is a traffic control method that uses a traffic control device that controls traffic in order to eliminate congestion in a communication network, wherein the traffic control device transmits and receives data on a communication network.
  • the traffic control device when the traffic control device has a plurality of call connection control means for executing a call connection control step, the traffic control device receives congestion control information, The congestion control management step of transmitting the congestion control information to the specified call connection control means by specifying the call connection control means for controlling the number of call connections based on the control information may be executed.
  • a traffic control method is a traffic control method that uses a traffic control device that controls traffic in order to eliminate congestion in a communication network.
  • a signal extracting step for extracting a call control signal to be transmitted / received, and the extracted call control A signal analysis step of analyzing the signal and measuring the number of call connections per unit time and the number of incomplete calls to the subscriber, and comparing the measured number of incomplete calls with a predetermined threshold value, and a comparison result It is determined whether or not there is a sign of congestion based on the above.If the result of the determination is that the sign of congestion has occurred, the control amount for controlling the number of call connections is determined.
  • a congestion determination step for generating congestion control information including information for specifying a control amount and a subscriber; analyzing the congestion control information; and performing a call blocking process for a call to a subscriber based on the control amount.
  • At least one call connection control step for controlling the number of call connections.
  • a call congestion control step for transmitting congestion control information to the specified call connection control means may be executed by specifying the call connection control means for controlling the number of call connections based on the call connection control means.
  • the call connection control means analyzes the congestion control information and controls the number of call connections by performing a call loss process on the call to the subscriber based on the connection control amount. Congestion can be eliminated or prevented.
  • the signal extraction means extracts a call control signal transmitted and received on the communication network and the congestion determination means makes a collective determination, means for determining whether congestion or a sign thereof has occurred is provided by the network. There is no need to provide each of the network component devices, and costs can be reduced.
  • FIG. 1 is a block diagram showing the configuration of the configuration of the traffic control device of the present invention.
  • FIG. 2 is a block diagram showing the configuration of the signal extraction unit in FIG.
  • FIG. 3 is a block diagram showing a configuration of the signal analyzer of FIG.
  • FIG. 4 is a block diagram showing a configuration of the congestion determination unit in FIG.
  • FIG. 5 is a block diagram showing a configuration of the congestion control management unit of FIG.
  • FIG. 6 is a block diagram showing a configuration of the call connection control unit of FIG.
  • FIG. 7 is a diagram for explaining call signal extraction by the signal extraction unit of FIG.
  • FIG. 8 is a diagram showing the operation of the traffic control device of FIG.
  • FIG. 9 is a diagram showing a state transition of a call using SIP. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a block diagram showing a configuration of a traffic control device according to one embodiment of the present invention.
  • the traffic control device includes a signal extraction unit 2 provided in the signal extraction device 1, a signal analysis unit 4 and a congestion determination unit 5 provided in the congestion detection device 3, and a congestion control management provided in the congestion control management device 6. It has a unit 7, a call connection control unit 9a provided in the call connection control unit 8a, and a call connection control unit 9b provided in the call connection control unit 8b.
  • call connection control device 8a (call connection control unit 9a) is connected to an IP telephone terminal (hereinafter, referred to as a signal extraction device 1 (signal extraction unit 2)) via an IP (Internet Protocol) network 10 Oa.
  • IP Internet Protocol
  • the call connection controller 8b (call connection controller 9b) is connected to the signal extractor 1 (signal extractor 2) and the IP network 1 Through O b Terminal 11d, 11e and 11f.
  • the configuration has two call connection control devices and two call connection control units.
  • the configuration is not limited to this, and the configuration may have one or three or more each. You can also.
  • call connection control devices 8a and 8b are appropriately referred to as “call connection control device 8"
  • call connection control units 9a and 9b are appropriately referred to as “call connection control unit 9”
  • IP networks 10a and 10b are appropriately referred to as "terminal 11" as appropriate.
  • devices for realizing the IP telephone network such as a soft switch, are omitted for ease of explanation.
  • the signal extraction unit 2 extracts a call control signal transmitted and received between the terminals 11 via the IP network 10, and the signal analysis unit 4 analyzes the extracted call control signal and outputs a unit time for the terminal 11.
  • the number of calls per connection that is, the number of completed calls, the number of calls that were not connected, and the number of uncompleted calls (hereinafter referred to as “overflow calls” as appropriate) are measured.
  • the congestion determination unit 5 compares the measured number of uncompleted calls with a predetermined threshold, determines whether or not congestion or a sign of congestion has occurred based on the comparison result. If it is determined that the sign of the call has occurred, the connection control amount for controlling the number of call connections is determined, and the connection control amount and the terminal where calls are concentrated (for example, 11a) are specified. Congestion control information (control request) including information (telephone number, etc.) to be used.
  • the congestion control management unit 7 receives the congestion control information from the congestion determination unit 5, and controls the number of call connections based on the congestion control information (the call connection control unit 9a in this figure). And transmits the congestion control information to the call connection control unit 9a.
  • the call connection control unit that controls the number of call connections is called the “control source”.
  • the call connection control unit 9 analyzes the congestion control information and controls the number of call connections by performing a call loss process on a call to the subscriber based on the connection control amount. This makes it possible to eliminate or prevent congestion.
  • the signal extraction unit 2 extracts the call control signal transmitted and received on the IP network 10 and the congestion determination unit 5 performs the determination at a time, it is determined whether congestion or a sign thereof has occurred. There is no need to provide a means for determination in each of the network components, and costs can be reduced.
  • the above operation is performed repeatedly according to a predetermined cycle.
  • FIG. 2 is a block diagram showing a configuration of the signal extraction unit 2 of FIG. 1.
  • the signal extraction unit 2 includes a call control signal relay unit 21 that relays a call control signal, and a call control signal that duplicates a call control signal. It has a copy unit 22 and a call control signal transmission unit 23 that transmits the copied call control signal to the signal analysis unit 4.
  • the operation of the signal extraction unit 2 extracts only the call control signal, duplicates it, and transmits it to the signal analysis unit 4.
  • FIG. 3 is a block diagram showing a configuration of the signal analysis unit 4 of FIG. 1.
  • the signal analysis unit 4 receives a call control signal from the signal extraction unit 2, and receives a call control signal from the signal extraction unit 2.
  • An overflow call number measurement unit 42 that analyzes the call control signal and measures the number of overflow calls, a connection call number measurement unit 43 that measures the number of connection calls, an overflow call number measurement unit 42, and a connection call number measurement It has a measurement result transmitting section 44 for transmitting the measurement result of the setting section 43 to the congestion determining section 5.
  • the number of overflow calls measured by the number-of-overflow-calls measuring section 42 is represented by the following equation (1).
  • V 1 indicates the number of overflow calls
  • X indicates the number of overflow calls (incomplete calls) at each terminal, and to indicates the starting point of the measurement cycle of the number of overflow calls (however, The first time indicates the time when the overflow call occurred)
  • t1 indicates the end point of the overflow call measurement period.
  • the measured number of overflow calls is the total amount of overflow calls per unit time at the terminal to be monitored.
  • T t 0
  • y 2 indicates the number of connected calls
  • x 2 indicates the number of connected calls (completed calls) at each terminal, and to indicates the starting point of the measurement cycle of the number of connected calls.
  • T1 indicates the end point of the connected call count measurement period.
  • the measured number of connected calls is the total number of connected calls per unit time at the monitored terminal.
  • FIG. 4 is a block diagram showing a configuration of the congestion determination unit 5 of FIG.
  • the measurement result receiving unit 51 receives the measurement result from the signal analysis unit 4, and the determination execution unit 52 determines whether or not congestion or a sign of congestion has occurred based on the received measurement result. .
  • the priority order determination unit 53 determines the priority of the subsequent processing.
  • connection control amount determination section 54 determines the connection control amount described above. In this case, the priority determined by the priority determining unit 53 is also reflected.
  • the congestion control information generator 55 generates congestion control information including the connection control amount and the telephone number of the terminal where the call is concentrated, and the congestion control information transmitter 56 congests the generated congestion control information. It is transmitted to the control management unit 7.
  • control status information receiving unit 57 and the control status information storage unit 58 will be described later.
  • the congestion determination is performed based on the result of measuring the number of overflow calls (cumulative value in the unit of a measurement cycle). It is determined that it has occurred.
  • connection control amount is represented by the total control code amount (for the number of calls Z), and the total control code amount is the maximum value of candidate A, candidate B, and candidate C.
  • candidate A is a default value (call number control processing cycle)
  • candidate B is a product of the value obtained by the above equation (2) and a predetermined control amount calculation coefficient (call number Z control processing cycle).
  • candidate C is the connection control amount applied to the previous control cycle.
  • FIG. 5 is a block diagram showing a configuration of the congestion control management unit 7.
  • the congestion control information receiving unit 71 receives the congestion control information from the congestion determining unit 5, and the control source determining unit 72 controls which terminal is connected to which call connection control unit, that is, which terminal is under control. It identifies the call connection control unit to be connected based on the telephone number included in the congestion control information, that is, the control source (in the example shown in FIG. 1, call connection control unit 9a). .
  • connection control instruction signal generation unit 73 When the control source is specified, the connection control instruction signal generation unit 73 generates a connection control instruction signal based on the received congestion control information, and the connection control instruction signal transmission unit 74 The control instruction signal is transmitted to the specified control source.
  • control source determining unit 72 is not provided, that is, the control source is not specified, and the connection control instruction signal is transmitted to all the call connection control units (in the example shown in FIG. 1, the call connection control units 9a and 9 b), each of the call connection control units analyzes the connection control instruction signal, and as a result, if the terminal to be connected is under management, the connection control for the target may be performed. good.
  • the instruction response signal receiving unit 75, the traffic information receiving unit 76, the control status information generating unit 77, and the control status information transmitting unit 78 will be described later.
  • FIG. 6 is a block diagram showing a configuration of the call connection control unit 9 of FIG.
  • connection control instruction signal receiving section 91 receives the connection control instruction signal from the congestion control management section 7, and the connection control execution section 92 receives the connection control instruction signal, that is, based on the connection control amount. To control connection. In order to maintain the predetermined number of connections determined by the connection control amount, connection of surplus calls is not performed. This is called a call loss process.
  • the instruction response signal generation unit 93 When the connection control is performed by the connection control execution unit 92, the instruction response signal generation unit 93 generates an instruction response signal indicating that, and the instruction response signal transmission unit 94 generates the instruction response signal. The instruction response signal is transmitted to the congestion control management unit 7.
  • the traffic monitoring unit 95 monitors the traffic in the IP network 10, the traffic information generation unit 96 generates traffic information indicating the result of the traffic monitoring, and the traffic information transmission unit 9 outputs the generated traffic information. Is transmitted to the congestion control management unit 7.
  • the above operation is executed by all the call connection control units 9 (in the case shown in FIG. 1, the call connection control units 9a and 9b).
  • the instruction response signal transmitted from the call connection control unit 9 is received by the instruction response signal receiving unit 75 of FIG. 5, and the traffic information transmitted from the call connection control unit 9 is also transmitted by the traffic information reception unit 76 of FIG. Is received by
  • the control status information generation unit 77 in FIG. 5 generates control status information based on the received instruction response signal and traffic information. By generating this control status information from the above two types of information, it is possible to obtain both the control history and the amount of change in traffic due to this control, that is, the success or failure of the control.
  • the control status information transmitting unit 78 transmits the generated control status information to the congestion determining unit 5.
  • control status information transmitted from the congestion control management unit 7 as described above is received by the control status information receiving unit 57 in FIG. 4, and the received control status information is stored in the control status information storage unit 58. You.
  • FIG. 8 is a sequence diagram showing the operation of the above traffic control device.
  • the call control signal is duplicated by the signal extraction unit 2 (S 1), transmitted (S 2), received by the signal analysis unit 4 (S 3), the number of overflow calls is measured (S 4), and further connected. The number of calls is measured (S5), and the measurement result is transmitted (S6).
  • the transmitted measurement result is received by the congestion determination unit 5 (S7), the determination is performed (S8), and when it is determined that congestion (including the sign of congestion in this figure) has occurred. (S8 : Yes), it is confirmed whether a plurality of congestions have occurred (S9). If a plurality of congestions have occurred (S9 : Yes), the congestion that should be preferentially eliminated or prevented ⁇ , in other words priority service there is confirmed (S 10), if the preferred service exists (S 10: Y e s) , the priority is determined (S 1 1), the connection control amount is determined (S 1 2).
  • congestion control information is generated (S13), and the generated congestion control information is transmitted (S14).
  • connection control amount is determined (S12), and even when there is no priority service (S10: No), the connection control amount is immediately determined (S12).
  • the number of overflow calls may be measured after the number of connected calls is measured.
  • the congestion control information transmitted in S14 is received by the congestion control management unit 7 (S15), the control source is determined (S16), a connection control instruction signal is generated (S17), and the congestion control information is generated.
  • the transmitted connection control instruction signal is transmitted (S18).
  • the transmitted connection control instruction signal is received by the call connection control unit 9 (S19), and connection control is performed (S20).
  • the traffic control device processes a call control signal using SIP (Session Initiation Protocol), when measuring the overflow call and the connected call, the procedure shown in FIG. 9 (from S101 to S11) is used. 1) is filled, and each judgment is made by the response code in the figure.
  • SIP Session Initiation Protocol
  • response code 180 in the figure is rRinging (calling)
  • the response code 200 is OK
  • the response code 401 is runauthorized (not authorized)
  • the response code 407 is rproxy Authentication Required.
  • Necessary J and response code 503 indicate ("Service Unavailable”.)
  • Such traffic control devices include a CPU (Central Processing Unit), hard disk drive, ROM (Read Onlv Memory), RAM (Ran It is possible to use a computer having a dom access memory, a keyboard, a display, a flexible disk drive, and a communication unit for performing communication by connecting to a communication network. In this case, the computer is made to read and execute a traffic control program for executing the functions of the above-described units.
  • CPU Central Processing Unit
  • hard disk drive read Onlv Memory
  • ROM Read Onlv Memory
  • RAM Random access memory
  • the computer is made to read and execute a traffic control program for executing the functions of the above-described units.
  • the traffic control program described above and a computer-readable program recording medium such as a flexible disk, a CD-ROM (Compact Disk Read Only Memory), a PC card, or the like on which the program is recorded are also provided by the present invention. Included in the range.
  • a traffic control method using such a traffic control device is also included in the scope of the present invention.
  • the present invention provides a traffic control device, a traffic control program, a program recording medium, and a traffic control method for controlling traffic in order to eliminate or prevent congestion in a communication network such as an IP network.
  • congestion control information including a connection control amount for controlling the number of call connections is analyzed, and a call loss process is performed on a call to a subscriber based on the connection control amount. Since the number of call connections is controlled, congestion can be eliminated or prevented.
  • a means for performing such determination is provided by a network component. There is no need to provide them separately, and costs can be reduced. In this way, costs can be reduced while controlling traffic accurately.

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  • Computer Networks & Wireless Communication (AREA)
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  • Telephonic Communication Services (AREA)

Abstract

There are provided a traffic control device, a traffic control program, a program recording medium, and a traffic control method capable of reducing the cost and accurately controlling the traffic. The traffic control device includes: a signal extraction section (2) for extracting a talk control signal transmitted/received on an IP network (10); a signal analysis section (4) for analyzing the talk control signal extracted and measuring the number of call connections and the number of incomplete calls to a terminal (11) per unit time; a congestion judgment section (5) for comparing the measured number of incomplete calls to a predetermined threshold value and judges whether a congestion or a symptom of congestion is generated according to the comparison result, and if the congestion is generated, deciding the connection control amount when controlling the number of call connections, and generating congestion control information including information for specifying the connection control amount and the terminal (11); and a call connection control section (9) for analyzing the congestion control information and performing call loss processing for the call to the terminal (11) according to the control amount, thereby controlling the number of call connections.

Description

明細書 トラフィック制御装置、 トラフィック制御プログラム、 プログラム記録媒体及び 卜ラフィック制御方法 技術分野  TECHNICAL FIELD A traffic control device, a traffic control program, a program recording medium, and a traffic control method
本発明は、 I P網等の通信ネットワークにおける輻輳を解消若しくは防止する ためにトラフィックを制御するトラフィック制御装置、 卜ラフィック制御プログ ラム、 プログラム記録媒体及びトラフィック制御方法に関する。. 背景技術  The present invention relates to a traffic control device for controlling traffic to eliminate or prevent congestion in a communication network such as an IP network, a traffic control program, a program recording medium, and a traffic control method. Background technology
I P網等の通信ネットワークにおいては、 特定の機器に通信要求が過剰に集中 した際に輻輳が発生する。 この輻輳は、 通信ネットワークのトラフィックを制御 することにより解消若しくは防止可能であり、 そのための方法、 装置が考案され ている （例えば、 特開 2 0 0 2— 2 6 9 8 1号公報 （第 6頁から第 9頁、 第 5図 In a communication network such as an IP network, congestion occurs when communication requests are excessively concentrated on a specific device. This congestion can be eliminated or prevented by controlling the traffic of the communication network, and a method and an apparatus for that purpose have been devised (for example, Japanese Patent Application Laid-Open No. 2002-26981 (No. 6). Page to page 9, Figure 5
) 参照） 。 ))).
しかしながら、 上記のような方法、 装置においては、 輻輳若しくはその兆候が 発生しているかを判定するための手段をルータ （中継装置） 等のネットワーク構 成機器毎に設けなければならないため、 施工、 保守点検、 改良作業等におけるコ ストの上昇を招き、 当業者に負担を強いていた。 発明の開示  However, in the above-described method and apparatus, means for determining whether congestion or a sign of congestion is occurring must be provided for each network component such as a router (relay device). The costs for inspections and improvement work increased, putting a burden on those skilled in the art. Disclosure of the invention
このような事情に鑑み本発明は、 コストが低減され、 且つトラフィックを正確 に制御可能なトラフィック制御装置、 トラフィック制御プログラム、 プログラム 記録媒体及び卜ラフィック制御方法を提供することを目的とする。  In view of such circumstances, an object of the present invention is to provide a traffic control device, a traffic control program, a program recording medium, and a traffic control method capable of reducing costs and accurately controlling traffic.
本発明の第 1の態様によるトラフィック制御装置は、 通信ネットワークにおけ る輻輳を解消するためにトラフィックを制御するトラフィック制御装置であって 、 通信ネットワーク上で送受される通話制御信号を抽出する信号抽出手段と、 抽 出された通話制御信号を解析し、 加入者に対する単位時間あたりの呼の接続数及 び不完了呼数を測定する信号解析手段と、 測定された不完了呼数と所定の閾値と を比較し、 比較結果に基づいて輻輳が発生しているか否かを判定し、 判定の結果 、 輻輳が発生していると判定された場合、 呼の接続数を制御するにあたっての制 御量を決定し、 制御量及び加入者を特定するための情報を含む輻輳制御情報を生 成する輻輳判定手段と、 輻輳制御情報を解析し、 制御量に基づいて、 加入者への 呼に対して呼損処理を行うことによリ呼の接続数を制御する少なくとも 1個の呼 接続制御手段とを有する。 A traffic control device according to a first aspect of the present invention is a traffic control device that controls traffic in order to eliminate congestion in a communication network, the signal control device extracting a call control signal transmitted / received on the communication network. Means and the extracted call control signals are analyzed to determine the number of call connections per unit time to the subscriber. Signal analysis means for measuring the number of uncompleted calls and the measured number of uncompleted calls, and comparing the measured number of uncompleted calls with a predetermined threshold value, and determining whether or not congestion has occurred based on the comparison result. If it is determined that congestion has occurred, determine the amount of control in controlling the number of call connections, and generate congestion control information that includes the amount of control and information to identify the subscriber. And at least one call connection control means for analyzing the congestion control information and performing a call loss process on the call to the subscriber based on the control amount to control the number of call connections. Have.
本発明の第 1の態様によるトラフィック制御装置において、 呼接続制御手段を 複数個有する場合、 輻輳判定手段から輻輳制御情報を受信し、 輻輳制御情報に基 づいて呼の接続数を制御させるべき呼接続制御手段を特定し、 特定された呼接続 制御手段に輻輳制御情報を送信する輻輳制御管理手段を備えるようにしても良い 本発明の第 1の態様によるトラフィック制御装置において、 前記輻輳判定手段 は、 複数の輻輳が発 4していることが判定され、 且つ、 優先して解消又は防止す べき輻輳が定められている場合に、 前記複数の輻輳間の優先順位を決定し、 前記 制御量を決定するにあたって前記優先順位を用いるようにしても良い。  In the traffic control device according to the first aspect of the present invention, when a plurality of call connection control means are provided, a call to receive congestion control information from the congestion determination means and to control the number of call connections based on the congestion control information is provided. The traffic control device according to the first aspect of the present invention may include a congestion control management unit that specifies connection control means and transmits congestion control information to the specified call connection control means. When it is determined that a plurality of congestions have occurred, and when congestion to be preferentially eliminated or prevented is determined, a priority order among the plurality of congestions is determined, and the control amount is determined. The priority may be used in the determination.
本発明の第 1の態様によるトラフィック制御装置において、 前記呼接続制御手 段は、 呼の接続数の制御を行った旨を記した指示応答信号を生成するとともに、 前記通信ネットワークにおけるトラフィックを監視して監視結果を示すトラフィ ック情報を生成し、 前記輻輳制御管理手段は、 前記指示応答信号及び前記トラヒ ック情報を前記呼接続制御手段から受信し、 受信した指示応答信号及びトラフィ ック情報に基づいて制御状況情報を生成し、 前記輻輳判定手段は、 前記輻輳制御 管理手段から前記制御状況情報を受信して蓄積し、 輻輳が発生しているか否かの 判定を行うにあたって蓄積された制御状況情報を用いるようにしても良い。 本発明の第 2の態様によるトラフィック制御装置は、 通信ネットワークにおけ る輻輳を防止するためにトラフィック.を制御するトラフィック制御装置であって 、 通信ネットワーク上で送受される通話制御信号を抽出する信号抽出手段と、 抽 出された通話制御信号を解析し、 加入者に対する単位時間あたりの呼の接続数及 び不完了呼数を測定する信号解析手段と、 測定された不完了呼数と所定の閾値と を比較し、 比較結果に基づいて輻輳の兆候が発生しているか否かを判定し、 判定 の結果、 輻輳の兆候が発生していると判定された場合、 呼の接続数を制御するに あたっての制御量を決定し、 制御量及び加入者を特定するための情報を含む輻輳 制御情報を生成する輻輳判定手段と、 輻輳制御情報を解析し、 制御量に基づいて 、 加入者への呼に対して呼損処理を行うことによリ呼の接続数を制御する少なく とも 1個の呼接続制御手段とを有する。 In the traffic control device according to the first aspect of the present invention, the call connection control means generates an instruction response signal indicating that the number of call connections has been controlled, and monitors traffic in the communication network. The congestion control management means receives the instruction response signal and the traffic information from the call connection control means, and receives the received instruction response signal and the traffic information. Based on the control status information, the congestion determination means receives and stores the control status information from the congestion control management means, and determines whether or not congestion has occurred. You may use situation information. A traffic control device according to a second aspect of the present invention is a traffic control device for controlling traffic in order to prevent congestion in a communication network, comprising a signal for extracting a call control signal transmitted and received on the communication network. Extraction means, signal analysis means for analyzing the extracted call control signal and measuring the number of call connections per unit time and the number of incomplete calls to the subscriber, and a signal analysis means for measuring the number of incomplete calls and Threshold and Are compared based on the comparison result, and whether or not a sign of congestion is occurring is determined.If the result of the determination is that a sign of congestion is occurring, the number of call connections is controlled. Congestion determination means for determining congestion control information including information for specifying the control amount and the subscriber, analyzing the congestion control information, and calling the subscriber based on the control amount. And has at least one call connection control means for controlling the number of call connections by performing a call loss process.
本発明の第 2の態様によるトラフィック制御装置において、 呼接続制御手段を 複数個有する場合、 輻輳判定手段から輻輳制御情報を受信し、 輻輳制御情報に基 づいて呼の接続数を制御させるべき呼接続制御手段を特定し、 特定された呼接続 制御手段に輻輳制御情報を送信する輻輳制御管理手段を備えるようにしても良い 本発明の第 2の態様によるトラフィック制御装置において、 前記輻輳判定手段 は、 複数の輻輳の兆候が発生していることが判定され、 且つ、 優先して解消又は 防止すべき輻輳が定められている場合に、 前記複数の輻輳の兆候間の優先順位を 決定し、 前記制御量を決定するにあたって前記優先順位を用いても良い。  In the traffic control device according to the second aspect of the present invention, when a plurality of call connection control means are provided, a call to receive congestion control information from the congestion determination means and to control the number of call connections based on the congestion control information is provided. The traffic control device according to the second aspect of the present invention may include a congestion control management unit that specifies connection control means and transmits congestion control information to the specified call connection control means. When it is determined that a plurality of signs of congestion have occurred, and when congestion to be preferentially eliminated or prevented is determined, a priority order among the plurality of signs of congestion is determined; The priority may be used in determining the control amount.
本発明の第 2の態様によるトラフィック制御装置において、 前記呼接続制御手 段は、 呼の接続数の制御を行った旨を記した指示応答信号を生成するとともに、 前記通信ネットワークにおける卜ラフィックを監視して監視結果を示すトラフィ ック情報'を生成し、 前記輻輳制御管理手段は、 前記指示応答信号及び前記トラヒ ック情報を前記呼接続制御手段から受信し、 受信した指示応答信号及びトラフィ ック情報に基づいて制御状況情報を生成し、 前記輻輳判定手段は、 前記輻輳制御 管理手段から前記制御状況情報を受信して蓄積し、 輻輳の兆候が発生しているか 否かの判定を行うにあたって蓄積された制御状況情報を用いても良い。  In the traffic control device according to the second aspect of the present invention, the call connection control means generates an instruction response signal indicating that the number of call connections has been controlled, and monitors traffic in the communication network. To generate traffic information 'indicating the monitoring result, the congestion control management means receives the instruction response signal and the traffic information from the call connection control means, and receives the received instruction response signal and traffic. The control status information is generated based on the control information, and the congestion determination unit receives and stores the control status information from the congestion control management unit, and determines whether or not a sign of congestion has occurred. The accumulated control status information may be used.
本発明の第 1の態様によるトラフィック制御プログラムは、 通信ネットワーク における輻輳を解消するためにトラフィックを制御する卜ラフィック制御装置で 用いられる卜ラフィック制御プログラムであって、 トラフィック制御装置を、 通 信ネットワーク上で送受される通話制御信号を抽出する信号抽出手段と、 抽出さ れた通話制御信号を解析し、 加入者に対する単位時間あたりの呼の接続数及び不 完了呼数を測定する信号解析手段と、 測定された不完了呼数と所定の閾値とを比 較し、 比較結果に基づいて輻輳が発生しているか否かを判定し、 判定の結果、 輻 輳が発生していると判定された場合、 呼の接続数を制御するにあたっての制御量 を決定し、 制御量及び加入者を特定するための情報を含む輻輳制御情報を生成す る輻輳判定手段と、 輻輳制御情報を解析し、 制御量に基づいて、 加入者への呼に 対して呼損処理を行うことによリ呼の接続数を制御する少なくとも 1個の呼接続 制御手段として機能させる。 A traffic control program according to a first aspect of the present invention is a traffic control program used in a traffic control device that controls traffic in order to eliminate congestion in a communication network. Signal extracting means for extracting a call control signal transmitted / received in the above, signal analyzing means for analyzing the extracted call control signal, and measuring the number of call connections per unit time to the subscriber and the number of incomplete calls; Ratio of the measured number of incomplete calls to a predetermined threshold And determines whether or not congestion is occurring based on the comparison result.If the result of the determination is that congestion is occurring, the control amount for controlling the number of call connections is determined. Congestion determination means for generating congestion control information including information for specifying a control amount and a subscriber; analyzing the congestion control information; and performing a call loss for a call to a subscriber based on the control amount. By performing the processing, it functions as at least one call connection control unit that controls the number of call connections.
本発明の第 1の態様によるトラフィック制御プログラムにおいて、 トラフイツ ク制御装置が呼接続制御手段を複数個有する場合、 トラフィック制御装置を、 輻 輳判定手段から輻輳制御情報を受信し、 輻輳制御情報に基づいて呼の接続数を制 御させるべき呼接続制御手段を特定し、 特定された呼接続制御手段に輻輳制御情 報を送信する輻輳制御管理手段として機能させるようにしても良い。  In the traffic control program according to the first aspect of the present invention, when the traffic control device has a plurality of call connection control means, the traffic control device receives congestion control information from the congestion determination means, and Alternatively, the call connection control means for controlling the number of call connections may be specified, and the call connection control means may function as congestion control management means for transmitting congestion control information to the specified call connection control means.
本発明の第 2の態様によるトラフィック制御プログラムは、 通信ネットワーク における輻輳を防止するためにトラフィックを制御するトラフィック制御装置で 用いられるトラフィック制御プログラムであって、 トラフィック制御装置を、 通 信ネットワーク上で送受される通話制御信号を抽出する信号抽出手段と、 抽出さ れた通話制御信号を解析し、 加入者に対する単位時間あたりの呼の接続数及び不 完了呼数を測定する信号解析手段と、 測定された不完了呼数と所定の閾値とを比 較し、 比較結果に基づいて輻輳の兆候が発生しているか否かを判定し、 判定の結 果、 輻輳の兆候が発生していると判定された場合、 呼の接続数を制御するにあた つての制御量を決定し、 制御量及び加入者を特定するための情報を含む輻輳制御 情報を生成する輻輳判定手段と、 輻輳制御情報を解析し、 制御量に基づいて、 加 入者への呼に対して呼損処理を行うことにより呼の接続数を制御する少なくとも 1個の呼接続制御手段として機能させる。  A traffic control program according to a second aspect of the present invention is a traffic control program used in a traffic control device that controls traffic in order to prevent congestion in a communication network, and that transmits and receives the traffic control device on a communication network. Signal extracting means for extracting a call control signal to be transmitted, signal analyzing means for analyzing the extracted call control signal, and measuring the number of call connections per unit time and the number of incomplete calls to the subscriber. The number of uncompleted calls is compared with a predetermined threshold value, and it is determined whether or not a sign of congestion is occurring based on the comparison result.As a result of the determination, it is determined that a sign of congestion is occurring. In this case, the control amount for controlling the number of call connections is determined, and congestion control information including the control amount and information for identifying the subscriber is generated. Congestion determination means to be formed and at least one call connection control for analyzing the congestion control information and controlling the number of call connections by performing a call loss process for a call to a subscriber based on the control amount. Function as a means.
本発明の第 2の態様によるトラフィック制御プログラムにおいて、 トラフイツ ク制御装置が呼接続制御手段を複数個有する場合、 トラフィック制御装置を、 輻 輳判定手段から輻輳制御情報を受信し、 輻輳制御情報に基づいて呼の接続数を制 御させるべき呼接続制御手段を特定し、 特定された呼接続制御手段に輻輳制御情 報を送信する輻輳制御管理手段として機能させるようにしても良い。  In the traffic control program according to the second aspect of the present invention, when the traffic control device has a plurality of call connection control means, the traffic control device receives congestion control information from the congestion determination means, and Alternatively, the call connection control means for controlling the number of call connections may be specified, and the call connection control means may function as congestion control management means for transmitting congestion control information to the specified call connection control means.
本発明の第 1の態様によるプログラム記録媒体は、 通信ネットワークにおける 輻輳を解消するためにトラフィックを制御するトラフィック制御装置で用いられ るトラフィック制御プログラムを記録したプログラム記録媒体であって、 トラフ ィック制御装置を、 通信ネットワーク上で送受される通話制御信号を抽出する信 号抽出手段と、 抽出された通話制御信号を解析し、 加入者に対する単位時間あた りの呼の接続数及び不完了呼数を測定する信号解析手段と、 測定された不完了呼 数と所定の閾値とを比較し、 比較結果に基づいて輻輳が発生しているか否かを判 定し、 判定の結果、 輻輳が発生していると判定された場合、 呼の接続数を制御す るにあたっての制御量を決定し、 制御量及び加入者を特定するための情報を含む 輻輳制御情報を生成する輻輳判定手段と、 輻輳制御情報を解析し、 制御量に基づ いて、 加入者への呼に対して呼損処理を行うことによリ呼 ώ接続数を制御する少 なくとも 1個の呼接続制御手段として機能させるトラフィック制御プログラムを 記録している。 The program recording medium according to the first aspect of the present invention is used in a communication network. A program recording medium for recording a traffic control program used in a traffic control device for controlling traffic to eliminate congestion, the traffic control device transmitting a traffic control signal for extracting a call control signal transmitted and received on a communication network. Signal extraction means, signal analysis means for analyzing the extracted call control signal and measuring the number of calls connected per unit time and the number of incomplete calls, and the measured number of incomplete calls and a predetermined number Is compared with the threshold value, and whether or not congestion is occurring is determined based on the comparison result. When the determination result indicates that congestion is occurring, the number of call connections is controlled. Congestion determination means for determining congestion control information including information for specifying the control amount and the subscriber, and analyzing the congestion control information and determining the congestion control information based on the control amount. Records a traffic control program to function as a single call connection control unit even without least control the re call ώ number of connections by the performing the call loss processing the call to a subscriber.
本発明の第 1の態様によるプログラム記録媒体において、 トラフィック制御プ ログラムが、 トラフィック制御装置が呼接続制御手段を複数個有する場合、 トラ フィック制御装置を、 輻輳判定手段から輻輳制御情報を受信し、 輻輳制御情報に 基づいて呼の接続数を制御させるべき呼接続制御手段を特定し、 特定された呼接 続制御手段に輻輳制御情報を送信する輻輳制御管理手段として機能させるように しても良い。  In the program recording medium according to the first aspect of the present invention, when the traffic control program has a plurality of call connection control means, the traffic control apparatus receives congestion control information from the congestion determination means, The call connection control means for controlling the number of call connections based on the congestion control information may be specified, and the function may function as congestion control management means for transmitting the congestion control information to the specified call connection control means. .
本発明の第 2の態様によるプログラム記録媒体は、 通信ネットワークにおける 輻輳を防止するためにトラフィックを制御するトラフィック制御装置で用いられ るトラフィック制御プログラムを記録したプログラム記録媒体であって、 トラフ イツク制御装置を、 通信ネッ卜ワーク上で送受される通話制御信号を抽出する信 号抽出手段と、 抽出された通話制御信号を解析し、 加入者に対する単位時間あた りの呼の接続数及び不完了呼数を測定する信号解析手段と、 測定された不完了呼 数と所定の閾値とを比較し、 比較結果に基づいて輻輳の兆候が発生しているか否 かを判定し、 判定の結果、 輻輳の兆候が発生していると判定された場合、 呼の接 続数を制御するにあたっての制御量を決定し、 制御量及び加入者を特定するため の情報を含む輻輳制御情報を生成する輻輳判定手段と、 輻輳制御情報を解析し、 制御量に基づいて、 加入者への呼に対して呼損処理を行うことにより呼の接続数 を制御する少なくとも 1個の呼接続制御手段として機能させるトラフィック制御 プログラムを記録している。 A program recording medium according to a second aspect of the present invention is a program recording medium that records a traffic control program used in a traffic control device that controls traffic in order to prevent congestion in a communication network. A signal extraction means for extracting a call control signal transmitted and received on the communication network, and analyzing the extracted call control signal to determine the number of calls connected per unit time to the subscriber and the number of incomplete calls. The signal analysis means for measuring the number of incomplete calls is compared with the measured number of incomplete calls and a predetermined threshold value, and it is determined whether or not a sign of congestion is occurring based on the comparison result. If it is determined that the sign is occurring, the control amount for controlling the number of call connections is determined, and the control amount and information for identifying the subscriber are determined. Congestion determination means for generating congestion control information including the number of call connections by analyzing congestion control information and performing call loss processing for calls to subscribers based on the control amount It records a traffic control program that functions as at least one call connection control means for controlling traffic.
本発明の第 2の態様によるプログラム記録媒体において、 トラフィック制御装 置が呼接続制御手段を複数個有する場合、 トラフィック制御プログラムが、 トラ フィック制御装置を、 輻輳判定手段から輻輳制御情報を受信し、 輻輳制御情報に 基づいて呼の接続数を制御させるべき呼接続制御手段を特定し、 特定された呼接 続制御手段に輻輳制御情報を送信する輻輳制御管理手段として機能させるように しても良い。  In the program recording medium according to the second aspect of the present invention, when the traffic control device has a plurality of call connection control means, the traffic control program receives the congestion control information from the congestion determination means, The call connection control means for controlling the number of call connections based on the congestion control information may be specified, and the function may function as congestion control management means for transmitting the congestion control information to the specified call connection control means. .
本発明の第 1の態様によるトラフィック制御方法は、 通信ネットワークにおけ る輻輳を解消するためにトラフィックを制御するトラフィック制御装置を用いる トラフィック制御方法であって、 トラフィック制御装置が、 通信ネットワーク上 で送受される通話制御信号を抽出する信号抽出ステップと、 抽出された通話制御 信号を解析し、 加入者に対する単位時間あたりの呼の接続数及び不完了呼数を測 定する信号解析ステップと、 測定された不完了呼数と所定の閾値とを比較し、 比 較結果に基づいて輻輳が発生しているか否かを判定し、 判定の結果、 輻輳が発生 していると判定された場合、 呼の接続数を制御するにあたっての制御量を決定し 、 制御量及び加入者を特定するための情報を含む輻輳制御情報を生成する輻輳判 定ステップと、 輻輳制御情報を解析し、 制御量に基づいて、 加入者への呼に対し て呼損処理を行うことにより呼の接続数を制御する少なくとも 1個の呼接続制御 ステップとを実行する。  A traffic control method according to a first aspect of the present invention is a traffic control method that uses a traffic control device that controls traffic in order to eliminate congestion in a communication network, wherein the traffic control device transmits and receives data on a communication network. A signal extraction step of extracting a call control signal to be used, a signal analysis step of analyzing the extracted call control signal, and measuring the number of call connections and the number of incomplete calls per unit time for the subscriber. The number of uncompleted calls is compared with a predetermined threshold value, and it is determined whether or not congestion has occurred based on the comparison result.If it is determined that congestion has occurred, A congestion determination step for determining a control amount in controlling the number of connections and generating congestion control information including the control amount and information for identifying a subscriber. And performing at least one call connection control step of controlling the number of call connections by performing a call loss process on a call to a subscriber based on the control amount by analyzing congestion control information. .
本発明の第 1の態様による卜ラフィック制御方法において、 卜ラフィック制御 装置が呼接続制御ステップを実行する呼接続制御手段を複数個有する場合、 トラ フィック制御装置が、 輻輳制御情報を受信し、 輻輳制御情報に基づいて呼の接続 数を制御させるべき呼接続制御手段を特定し、 特定された呼接続制御手段に輻輳 制御情報を送信する輻輳制御管理ステツプを実行するようにしても良い。  In the traffic control method according to the first aspect of the present invention, when the traffic control device has a plurality of call connection control means for executing a call connection control step, the traffic control device receives congestion control information, The congestion control management step of transmitting the congestion control information to the specified call connection control means by specifying the call connection control means for controlling the number of call connections based on the control information may be executed.
本発明の第 2の態様によるトラフィック制御方法は、 通信ネットワークにおけ る輻輳を解消するためにトラフィックを制御するトラフィック制御装置を用いる 卜ラフィック制御方法であって、 トラフィック制御装置が、 通信ネットワーク上 で送受される通話制御信号を抽出する信号抽出ステップと、 抽出された通話制御 信号を解析し、 加入者に対する単位時間あたりの呼の接続数及ぴ不完了呼数を測 定する信号解析ステップと、 測定された不完了呼数と所定の閾値とを比較し、 比 較結果に基づいて輻輳の兆候が発生しているか否かを判定し、 判定の結果、 輻輳 の兆候が発生していると判定された場合、 呼の接続数を制御するにあたっての制 御量を決定し、 制御量及び加入者を特定するための情報を含む輻輳制御情報を生 成する輻輳判定ステップと、 輻輳制御情報を解析し、 制御量に基づいて、 加入者 への呼に対して呼損処理を行うことによリ呼の接続数を制御する少なくとも 1個 の呼接続制御ステツプとを実行する。 A traffic control method according to a second aspect of the present invention is a traffic control method that uses a traffic control device that controls traffic in order to eliminate congestion in a communication network. A signal extracting step for extracting a call control signal to be transmitted / received, and the extracted call control A signal analysis step of analyzing the signal and measuring the number of call connections per unit time and the number of incomplete calls to the subscriber, and comparing the measured number of incomplete calls with a predetermined threshold value, and a comparison result It is determined whether or not there is a sign of congestion based on the above.If the result of the determination is that the sign of congestion has occurred, the control amount for controlling the number of call connections is determined. A congestion determination step for generating congestion control information including information for specifying a control amount and a subscriber; analyzing the congestion control information; and performing a call blocking process for a call to a subscriber based on the control amount. And at least one call connection control step for controlling the number of call connections.
本発明の第 2の態様によるトラフィック制御方法において、 トラフィック制御 装置が呼接続制御ステップを実行する呼接続制御手段を複数個有する場合、 トラ フィック制御装置が、 輻輳制御情報を受信し、 輻輳制御情報に基づいて呼の接続 数を制御させるべき呼接続制御手段を特定し、 特定された呼接続制御手段に輻輳 制御情報を送信する輻輳制御管理ステツプを実行するようにしても良い。  In the traffic control method according to the second aspect of the present invention, when the traffic control device has a plurality of call connection control means for executing a call connection control step, the traffic control device receives the congestion control information, A call congestion control step for transmitting congestion control information to the specified call connection control means may be executed by specifying the call connection control means for controlling the number of call connections based on the call connection control means.
上記のとおり、 呼接続制御手段は、 輻輳制御情報を解析し、 接続制御量に基づ いて、 加入者への呼に対して呼損処理を行うことにより呼の接続数を制御するた め、 輻輳の解消若しくは防止が可能となる。  As described above, the call connection control means analyzes the congestion control information and controls the number of call connections by performing a call loss process on the call to the subscriber based on the connection control amount. Congestion can be eliminated or prevented.
また、 信号抽出手段が通信ネットワーク上で送受される通話制御信号を抽出し 、 輻輳判定手段が一括して判定を行うため、 輻輳若しくはその兆候が発生してい るかを判定するための手段をネッ卜ワーク構成機器其々に設ける必要がなく、 コ ス卜の低減が可能となる。  Also, since the signal extraction means extracts a call control signal transmitted and received on the communication network and the congestion determination means makes a collective determination, means for determining whether congestion or a sign thereof has occurred is provided by the network. There is no need to provide each of the network component devices, and costs can be reduced.
したがって、 コストが低減され、 且つトラフィックを正確に制御可能なトラフ イツク制御装置、 トラフィック制御プログラム、 プログラム記録媒体及びトラフ イツク制御方法を提供することが可能となる。  Therefore, it is possible to provide a traffic control device, a traffic control program, a program recording medium, and a traffic control method capable of reducing costs and accurately controlling traffic.
また、 指示応答信号及びトラフィック情報に基づいて制御状況情報を生成する ことにより、 制御の履歴と、 この制御によるトラフィックの変化量、 つまり制御 の成否の両方を得ることができる。 図面の簡単な説明  Further, by generating the control status information based on the instruction response signal and the traffic information, it is possible to obtain both the control history and the amount of change in traffic due to this control, that is, whether the control was successful or not. BRIEF DESCRIPTION OF THE FIGURES
図 1は本発明のトラフィック制御装置の構成の構成を示すプロック図である。 図 2は図 1の信号抽出部の構成を示すプロック図である。 FIG. 1 is a block diagram showing the configuration of the configuration of the traffic control device of the present invention. FIG. 2 is a block diagram showing the configuration of the signal extraction unit in FIG.
図 3は図 1の信号解析部の構成を示すブロック図である。  FIG. 3 is a block diagram showing a configuration of the signal analyzer of FIG.
図 4は図 1の輻輳判定部の構成を示すブロック図である。  FIG. 4 is a block diagram showing a configuration of the congestion determination unit in FIG.
図 5は図 1の輻輳制御管理部の構成を示すブロック図である。  FIG. 5 is a block diagram showing a configuration of the congestion control management unit of FIG.
図 6は図 1の呼接続制御部の構成を示すブロック図である。  FIG. 6 is a block diagram showing a configuration of the call connection control unit of FIG.
図 7は図 1の信号抽出部による通話信号抽出を説明する図である。  FIG. 7 is a diagram for explaining call signal extraction by the signal extraction unit of FIG.
図 8は図 1のトラフィック制御装置の作用を示す図である。  FIG. 8 is a diagram showing the operation of the traffic control device of FIG.
図 9は S I Pが用いられた呼の状態遷移を示す図である。 発明を実施するための最良の形態  FIG. 9 is a diagram showing a state transition of a call using SIP. BEST MODE FOR CARRYING OUT THE INVENTION
以下、 図面を用いつつ本発明のトラフィック制御装置、 卜ラフィック制御プロ グラム、 プログラム記録媒体、 及びトラフィック制御方法についての説明を行う なお、 以下の実施の形態は、 あくまでも本発明の説明のためのものであり、 本 発明の範囲を制限するものではない。 したがって、 当業者であれば、 これらの各 要素又は全要素を含んだ各種の実施の形態を採用することが可能であるが、 これ らの実施の形態も本発明の範囲に含まれる。  Hereinafter, a traffic control device, a traffic control program, a program recording medium, and a traffic control method according to the present invention will be described with reference to the drawings. The following embodiments are merely for the purpose of describing the present invention. And does not limit the scope of the present invention. Therefore, those skilled in the art can adopt various embodiments including these elements or all the elements, but these embodiments are also included in the scope of the present invention.
また、 実施の形態を説明するための全図において、 同一要素のものは同一符号 を付与し、 これらに関する反復説明は省略する。  In all the drawings for describing the embodiments, the same components are denoted by the same reference numerals, and the repeated description thereof will be omitted.
図 1は本発明の一実施の形態に係るトラフィック制御装置の構成を示すプロッ ク図である。  FIG. 1 is a block diagram showing a configuration of a traffic control device according to one embodiment of the present invention.
トラフィック制御装置は、 信号抽出装置 1に設けられた信号抽出部 2と、 輻輳 検知装置 3に設けられた信号解析部 4及び輻輳判定部 5と、 輻輳制御管理装置 6 に設けられた輻輳制御管理部 7と、 呼接続制御装置 8 aに設けられた呼接続制御 部 9 aと、 呼接続制御装置 8 bに設けられた呼接続制御部 9 bとを有する。  The traffic control device includes a signal extraction unit 2 provided in the signal extraction device 1, a signal analysis unit 4 and a congestion determination unit 5 provided in the congestion detection device 3, and a congestion control management provided in the congestion control management device 6. It has a unit 7, a call connection control unit 9a provided in the call connection control unit 8a, and a call connection control unit 9b provided in the call connection control unit 8b.
また、 呼接続制御装置 8 a (呼接続制御部 9 a ) は信号抽出装置 1 (信号抽出 部 2 ) 及び I P ( I nternet Protoco l ) 網 1 O aを介して I P電話端末 （以下、 In addition, the call connection control device 8a (call connection control unit 9a) is connected to an IP telephone terminal (hereinafter, referred to as a signal extraction device 1 (signal extraction unit 2)) via an IP (Internet Protocol) network 10 Oa.
"端末" とする） 1 1 a、 1 1 b及び 1 1 cと接続され、 呼接続制御装置 8 b ( 呼接続制御部 9 b ) は信号抽出装置 1 (信号抽出部 2 ) 及び I P網 1 O bを介し て端末 1 1 d、 1 1 e及び 1 1 f と接続されている。 11a, 11b and 11c are connected. The call connection controller 8b (call connection controller 9b) is connected to the signal extractor 1 (signal extractor 2) and the IP network 1 Through O b Terminal 11d, 11e and 11f.
なお、 本実施の形態においては、 呼接続制御装置と呼接続制御部を其々 2個有 する構成としたが、 これに限定されず、 其々を 1個あるいは 3個以上有する構成 とすることもできる。  Note that, in the present embodiment, the configuration has two call connection control devices and two call connection control units. However, the configuration is not limited to this, and the configuration may have one or three or more each. You can also.
また、 呼接制御装置 8 a及び 8 bを適宜 "呼接続制御装置 8 " 、 呼接続制御部 9 a及び 9 bを適宜 "呼接続制御部 9 " 、 I P網 1 0 a及び 1 0 bを適宜 " ί Ρ 網 1 0 " 、 端末 1 1 a、 1 1 b、 1 1 c、 1 1 d、 1 1 e及び 1 1 f を適宜 "端 末 1 1 " と総称する。  Also, the call connection control devices 8a and 8b are appropriately referred to as "call connection control device 8", the call connection control units 9a and 9b are appropriately referred to as "call connection control unit 9", and the IP networks 10a and 10b. The "network 10" and the terminals 11a, 11b, 11c, 11d, 11e and 11f are collectively referred to as "terminal 11" as appropriate.
また、 本図においては、 説明を容易にするため、 ソフ トスィッチ等の I P電話 網を実現するための機器の記載は省略している。  Also, in this figure, devices for realizing the IP telephone network, such as a soft switch, are omitted for ease of explanation.
信号抽出部 2は、 I P網 1 0を介して端末 1 1間で送受される通話制御信号を 抽出し、 信号解析部 4は、 抽出された通話制御信号を解析し、 端末 1 1に対する 単位時間あたりの呼の接続数、 つまり完了呼数と、 接続されなかった呼の数、 つ まリ不完了呼数 （以下、 適宜 "あふれ呼数" と呼称する） を測定する。  The signal extraction unit 2 extracts a call control signal transmitted and received between the terminals 11 via the IP network 10, and the signal analysis unit 4 analyzes the extracted call control signal and outputs a unit time for the terminal 11. The number of calls per connection, that is, the number of completed calls, the number of calls that were not connected, and the number of uncompleted calls (hereinafter referred to as “overflow calls” as appropriate) are measured.
輻輳判定部 5は、 測定された不完了呼数と所定の閾値とを比較し、 比較結果に 基づいて輻輳若しくは輻輳の兆候が発生しているか否かを判定し、 判定の結果、 輻輳若しくは輻輳の兆候が発生していると判定された場合、 呼の接続数を制御す るにあたっての接続制御量を決定し、 接続制御量及び呼が集中している端末 （例 えば 1 1 a ) を特定するための情報 （電話番号等） を含む輻輳制御情報 （制御依 頼） を生成する。  The congestion determination unit 5 compares the measured number of uncompleted calls with a predetermined threshold, determines whether or not congestion or a sign of congestion has occurred based on the comparison result. If it is determined that the sign of the call has occurred, the connection control amount for controlling the number of call connections is determined, and the connection control amount and the terminal where calls are concentrated (for example, 11a) are specified. Congestion control information (control request) including information (telephone number, etc.) to be used.
輻輳制御管理部 7は、 輻輳判定部 5から輻輳制御情報を受信し、 輻輳制御情報 に基づいて呼の接続数を制御させるべき呼接続制御部 （本図においては呼接続制 御部 9 a ) を特定し、 呼接続制御部 9 aに輻輳制御情報を送信する。 なお、 呼の 接続数を制御する呼接続制御部を "制御元" と呼ぶ。  The congestion control management unit 7 receives the congestion control information from the congestion determination unit 5, and controls the number of call connections based on the congestion control information (the call connection control unit 9a in this figure). And transmits the congestion control information to the call connection control unit 9a. The call connection control unit that controls the number of call connections is called the “control source”.
呼接続制御部 9は、 輻輳制御情報を解析し、 接続制御量に基づいて、 加入者へ の呼に対して呼損処理を行うことにより呼の接続数を制御する。 これにより輻輳 の解消若しくは防止が可能となる。  The call connection control unit 9 analyzes the congestion control information and controls the number of call connections by performing a call loss process on a call to the subscriber based on the connection control amount. This makes it possible to eliminate or prevent congestion.
また、 信号抽出部 2が I P網 1 0上で送受される通話制御信号を抽出し、 輻輳 判定部 5が一括して判定を行うため、 輻輳若しくはその兆候が発生しているかを 判定するための手段をネットワーク構成機器其々に設ける必要がなく、 コストの 低減が可能となる。 Also, since the signal extraction unit 2 extracts the call control signal transmitted and received on the IP network 10 and the congestion determination unit 5 performs the determination at a time, it is determined whether congestion or a sign thereof has occurred. There is no need to provide a means for determination in each of the network components, and costs can be reduced.
なお、 上記の動作は所定の周期に則り、 反復して行われる。  The above operation is performed repeatedly according to a predetermined cycle.
図 2は、 図 1の信号抽出部 2の構成を示すブロック図であり、 信号抽出部 2は 、 通話制御信号を中継する通話制御信号中継部 2 1と、 通話制御信号を複製する 通話制御信号複製部 2 2と、 複製された通話制御信号を信号解析部 4に送信する 通話制御信号送信部 2 3を有する。  FIG. 2 is a block diagram showing a configuration of the signal extraction unit 2 of FIG. 1. The signal extraction unit 2 includes a call control signal relay unit 21 that relays a call control signal, and a call control signal that duplicates a call control signal. It has a copy unit 22 and a call control signal transmission unit 23 that transmits the copied call control signal to the signal analysis unit 4.
つまり、 この信号抽出部 2の動作は、 図 7に示すとおり、 通話制御信号のみを 抽出し、 これを複製し、 信号解析部 4に送信する。  That is, as shown in FIG. 7, the operation of the signal extraction unit 2 extracts only the call control signal, duplicates it, and transmits it to the signal analysis unit 4.
図 3は、 図 1の信号解析部 4の構成を示すブロック図であり、 信号解析部 4は 、 信号抽出部 2より通話制御信号を受信する通話制御信号受信部 4 1 と、 受信さ れた通話制御信号を解析し、 あふれ呼数を測定するあふれ呼数測定部 4 2と、 接 続呼数を測定する接続呼数測定部 4 3と、 あふれ呼数測定部 4 2及び接続呼数測 定部 4 3の測定結果を輻輳判定部 5に送信する測定結果送信部 4 4を有する。 前記のあふれ呼数測定部 4 2により測定されるあふれ呼数は、 下記の式 （1 ) により表される。
Figure imgf000012_0001
上記の式 （1 ) における V 1は、 あふれ呼数を指し、 X は個々の端末におけ るあふれ呼 （不完了呼） 数を指し、 toはあふれ呼数の測定周期の起点 （但し、 測定の初回はあふれ呼の発生した時刻） を指し、 t1はあふれ呼数測定周期の終 点を指す。 FIG. 3 is a block diagram showing a configuration of the signal analysis unit 4 of FIG. 1. The signal analysis unit 4 receives a call control signal from the signal extraction unit 2, and receives a call control signal from the signal extraction unit 2. An overflow call number measurement unit 42 that analyzes the call control signal and measures the number of overflow calls, a connection call number measurement unit 43 that measures the number of connection calls, an overflow call number measurement unit 42, and a connection call number measurement It has a measurement result transmitting section 44 for transmitting the measurement result of the setting section 43 to the congestion determining section 5. The number of overflow calls measured by the number-of-overflow-calls measuring section 42 is represented by the following equation (1).
Figure imgf000012_0001
In the above equation (1), V 1 indicates the number of overflow calls, X indicates the number of overflow calls (incomplete calls) at each terminal, and to indicates the starting point of the measurement cycle of the number of overflow calls (however, The first time indicates the time when the overflow call occurred), and t1 indicates the end point of the overflow call measurement period.
つまり、 測定されるあふれ呼数は、 監視対象である端末におけるあふれ呼数の 単位時間あたリの総量である。  In other words, the measured number of overflow calls is the total amount of overflow calls per unit time at the terminal to be monitored.
前記の接続呼数測定部 4 3により測定される接続呼数は、 下記の式 （2 ) によ リ表される。 T = tl The number of connected calls measured by the number-of-connected-calls measuring section 43 is represented by the following equation (2). T = tl
y 2 = ( 2 )  y 2 = (2)
T = t 0 上記の式 （2 ) における y 2は、 接続呼数を指し、 x 2は個々の端末における 接続呼 （完了呼） 数を指し、 toは接続呼数の測定周期の起点を指し、 t1は接続 呼数測定周期の終点を指す。 T = t 0 In the above equation (2), y 2 indicates the number of connected calls, x 2 indicates the number of connected calls (completed calls) at each terminal, and to indicates the starting point of the measurement cycle of the number of connected calls. , T1 indicates the end point of the connected call count measurement period.
つまり、 測定される接続呼数は、 監視対象である端末における接続呼数の単位 時間あたりの総量である。  In other words, the measured number of connected calls is the total number of connected calls per unit time at the monitored terminal.
図 4は、 図 1の輻輳判定部 5の構成を示すブロック図である。  FIG. 4 is a block diagram showing a configuration of the congestion determination unit 5 of FIG.
測定結果受信部 5 1は、 信号解析部 4より測定結果を受信し、 判定実行部 5 2 は、 受信された測定結果に基づいて、 輻輳若しくは輻輳の兆候が発生しているか 否かを判定する。  The measurement result receiving unit 51 receives the measurement result from the signal analysis unit 4, and the determination execution unit 52 determines whether or not congestion or a sign of congestion has occurred based on the received measurement result. .
優先順位決定部 5 3は、 輻輳若しくは輻輳の兆候力複数存在しており、 且つ優 先して解消又は防止すべき輻輳が定められている場合、 以降の処理の優先順位を 決定する。  When there is congestion or a plurality of signs of congestion and congestion to be eliminated or prevented with priority is determined, the priority order determination unit 53 determines the priority of the subsequent processing.
接続制御量決定部 5 4は、 前述の接続制御量を決定する。 これにあたっては、 優先順位決定部 5 3により定められた優先順位も反映される。  The connection control amount determination section 54 determines the connection control amount described above. In this case, the priority determined by the priority determining unit 53 is also reflected.
輻輳制御情報生成部 5 5は、 接続制御量と呼が集中している端末の電話番号等 を含む輻輳制御情報を生成し、 輻輳制御情報送信部 5 6は、 生成された輻輳制御 情報を輻輳制御管理部 7に送信する。  The congestion control information generator 55 generates congestion control information including the connection control amount and the telephone number of the terminal where the call is concentrated, and the congestion control information transmitter 56 congests the generated congestion control information. It is transmitted to the control management unit 7.
なお、 制御状況情報受信部 5 7及び制御状況情報蓄積部 5 8については後述す る。  The control status information receiving unit 57 and the control status information storage unit 58 will be described later.
また、 前記の輻輳判定は、 あふれ呼数の測定結果 （測定周期単位の累計値） に 基づいて行われ、 端末のあふれ呼数が前述の閾値よリ大であれば輻輳若しくは輻 輳の兆候が発生していると判定される。  In addition, the congestion determination is performed based on the result of measuring the number of overflow calls (cumulative value in the unit of a measurement cycle). It is determined that it has occurred.
但し、 すでに接続制御中の端末については、 接続制御が解除されるまで、 判定 は行われない。  However, for terminals that are already under connection control, judgment is not performed until connection control is released.
また、 接続制御量は、 制御コード総量 （呼数 Z分） で表され、 この制御コード 総量は、 候補 A、 候補 B及び候補 Cの最大値である。 候補 Aは、 デフォルトの値 （呼数 制御処理周期） であり、 候補 Bは、 前述の 式 （2 ) により得られた値と所定の制御量算出係数の積 （呼数 Z制御処理周期） であり、 候補 Cは、 前制御周期に適用した接続制御量である。 The connection control amount is represented by the total control code amount (for the number of calls Z), and the total control code amount is the maximum value of candidate A, candidate B, and candidate C. Candidate A is a default value (call number control processing cycle), and candidate B is a product of the value obtained by the above equation (2) and a predetermined control amount calculation coefficient (call number Z control processing cycle). Yes, candidate C is the connection control amount applied to the previous control cycle.
但し、 まだ一度たりとも制御依頼が行われていない、 つまり輻輳制御情報が送 信されていない場合は、 候補 Cは存在せず、 候補 A及び Bのみを用いて制御コー ド総量が算出される。  However, if no control request has been made even once, that is, if congestion control information has not been transmitted, candidate C does not exist, and the total control code amount is calculated using only candidates A and B. .
図 5は、 輻輳制御管理部 7の構成を示すブロック図である。  FIG. 5 is a block diagram showing a configuration of the congestion control management unit 7.
輻輳制御情報受信部 7 1は、 輻輳判定部 5より輻輳制御情報を受信し、 制御元 決定部 7 2は、 どの端末がどの呼接続制御部に接続されているか、 つまりどの端 末を管理下においているかを把握しており、 輻輳制御情報に含まれる電話番号か ら接続制御すべき呼接続制御部、 つまり制御元 （図 1に示した例においては、 呼 接続制御部 9 a ) を特定する。  The congestion control information receiving unit 71 receives the congestion control information from the congestion determining unit 5, and the control source determining unit 72 controls which terminal is connected to which call connection control unit, that is, which terminal is under control. It identifies the call connection control unit to be connected based on the telephone number included in the congestion control information, that is, the control source (in the example shown in FIG. 1, call connection control unit 9a). .
接続制御指示信号生成部 7 3は、 制御元が特定されると、 受信された輻輳制御 情報に基づいて接続制御指示信号を生成し、 接続制御指示信号送信部 7 4は、 生 成された接続制御指示信号を特定された制御元に送信する。  When the control source is specified, the connection control instruction signal generation unit 73 generates a connection control instruction signal based on the received congestion control information, and the connection control instruction signal transmission unit 74 The control instruction signal is transmitted to the specified control source.
なお、 制御元決定部 7 2を設けず、 つまり、 制御元を特定せず、 接続制御指示 信号を全ての呼接続制御部 （図 1に示した例においては、 呼接続制御部 9 a及び 9 b ) に送信し、 呼接続制御部の其々が接続制御指示信号を解析し、 この結果、 接続制御の対象となる端末が管理下にあれば、 その対象に対する接続制御を行う ようにしても良い。  Note that the control source determining unit 72 is not provided, that is, the control source is not specified, and the connection control instruction signal is transmitted to all the call connection control units (in the example shown in FIG. 1, the call connection control units 9a and 9 b), each of the call connection control units analyzes the connection control instruction signal, and as a result, if the terminal to be connected is under management, the connection control for the target may be performed. good.
なお、 指示応答信号受信部 7 5、 卜ラフィック情報受信部 7 6、 制御状況情報 生成部 7 7及び制御状況情報送信部 7 8については後述する。  The instruction response signal receiving unit 75, the traffic information receiving unit 76, the control status information generating unit 77, and the control status information transmitting unit 78 will be described later.
図 6は、 図 1の呼接続制御部 9の構成を示すブロック図である。  FIG. 6 is a block diagram showing a configuration of the call connection control unit 9 of FIG.
接続制御指示信号受信部 9 1は、 輻輳制御管理部 7から接続制御指示信号を受 信し、 接続制御実行部 9 2は、 受信された接続制御指示信号に基づいて、 つまり 接続制御量に基づいて接続制御を行う。 この接続制御量に定められた所定の接続 数を維持するために、 余剰分の呼の接続は行われない。 これを呼損処理という。 指示応答信号生成部 9 3は、 接続制御実行部 9 2により接続制御が行われると 、 その旨を記した指示応答信号を生成し、 指示応答信号送信部 9 4は、 生成され た指示応答信号を輻輳制御管理部 7に送信する。 The connection control instruction signal receiving section 91 receives the connection control instruction signal from the congestion control management section 7, and the connection control execution section 92 receives the connection control instruction signal, that is, based on the connection control amount. To control connection. In order to maintain the predetermined number of connections determined by the connection control amount, connection of surplus calls is not performed. This is called a call loss process. When the connection control is performed by the connection control execution unit 92, the instruction response signal generation unit 93 generates an instruction response signal indicating that, and the instruction response signal transmission unit 94 generates the instruction response signal. The instruction response signal is transmitted to the congestion control management unit 7.
また、 トラフィック監視部 95は、 I P網 1 0におけるトラフィックを監視し 、 トラフィック情報生成部 96は、 トラフィックの監視結果を示すトラフィック 情報を生成し、 トラフィック情報送信部 9フは、 生成されたトラフィック情報を 輻輳制御管理部 7に送信する。  The traffic monitoring unit 95 monitors the traffic in the IP network 10, the traffic information generation unit 96 generates traffic information indicating the result of the traffic monitoring, and the traffic information transmission unit 9 outputs the generated traffic information. Is transmitted to the congestion control management unit 7.
上記の動作は、 全ての呼接続制御部 9 (図 1に示した場合においては、 呼接続 制御部 9 a及び 9 b) により実行される。  The above operation is executed by all the call connection control units 9 (in the case shown in FIG. 1, the call connection control units 9a and 9b).
呼接続制御部 9から送信された指示応答信号は、 図 5の指示応答信号受信部 7 5により受信され、 同じく呼接続制御部 9から送信されたトラフィック情報は、 図 5のトラフィック情報受信部 76により受信される。  The instruction response signal transmitted from the call connection control unit 9 is received by the instruction response signal receiving unit 75 of FIG. 5, and the traffic information transmitted from the call connection control unit 9 is also transmitted by the traffic information reception unit 76 of FIG. Is received by
図 5の制御状況情報生成部 77は、 受信された指示応答信号とトラフィック情 報とに基づいて制御状況情報を生成する。 この制御状況情報を、 前述の 2種類の 情報から生成することにより、 制御の履歴と、 この制御によるトラフィックの変 化量、 つまり制御の成否の両方を得ることができる。  The control status information generation unit 77 in FIG. 5 generates control status information based on the received instruction response signal and traffic information. By generating this control status information from the above two types of information, it is possible to obtain both the control history and the amount of change in traffic due to this control, that is, the success or failure of the control.
制御状況情報送信部 78は、 生成された制御状況情報を輻輳判定部 5に送信す る。  The control status information transmitting unit 78 transmits the generated control status information to the congestion determining unit 5.
上記のように輻輳制御管理部 7から送信された制御状況情報は、 図 4の制御状 況情報受信部 57により受信され、 受信された制御状況情報は、 制御状況情報蓄 積部 58に蓄積される。  The control status information transmitted from the congestion control management unit 7 as described above is received by the control status information receiving unit 57 in FIG. 4, and the received control status information is stored in the control status information storage unit 58. You.
なお、 前述の判定実行部 52は、 判定を行うにあたって、 この制御状況情報を 用いる。  Note that the above-described determination execution unit 52 uses this control status information when making a determination.
図 8は、 上記のトラフィック制御装置の作用を示すシーケンス図である。 信号抽出部 2により通話制御信号が複製され （S 1 ) 、 送信されると （S 2) 、 信号解析部 4により受信され （S 3) 、 あふれ呼数が測定され （S4) 、 さら に接続呼数が測定され （S 5) 、 測定結果が送信される （S 6) 。  FIG. 8 is a sequence diagram showing the operation of the above traffic control device. The call control signal is duplicated by the signal extraction unit 2 (S 1), transmitted (S 2), received by the signal analysis unit 4 (S 3), the number of overflow calls is measured (S 4), and further connected. The number of calls is measured (S5), and the measurement result is transmitted (S6).
送信された測定結果は、 輻輳判定部 5により受信され （S7) 、 判定が行われ る （S 8) 、 輻輳 （本図においては輻輳の兆候も含む） が発生していると判定さ れると （S 8 : Y e s) 、 輻輳が複数発生しているかが確認され （S 9) 、 輻輳 が複数発生している場合 （S 9 ： Y e s) 、 優先的に解消若しくは防止すべき輻 輳、 換言すれば優先サービスがあるかが確認され （S 10) 、 優先サービスが存 在する場合 （S 10 : Y e s) 、 優先順位が決定され （S 1 1 ) 、 接続制御量が 決定される （S 1 2) 。 The transmitted measurement result is received by the congestion determination unit 5 (S7), the determination is performed (S8), and when it is determined that congestion (including the sign of congestion in this figure) has occurred. (S8 : Yes), it is confirmed whether a plurality of congestions have occurred (S9). If a plurality of congestions have occurred (S9 : Yes), the congestion that should be preferentially eliminated or prevented 輳, in other words priority service there is confirmed (S 10), if the preferred service exists (S 10: Y e s) , the priority is determined (S 1 1), the connection control amount is determined (S 1 2).
接続制御量が決定されると、 輻輳制御情報が生成され （S 13) 、 生成された 輻輳制御情報が送信される （S 14) 。  When the connection control amount is determined, congestion control information is generated (S13), and the generated congestion control information is transmitted (S14).
なお、 輻輳が発生していないと判定された場合 （S8 ： No) は、 測定結果の 受信が行われ （S7) 、 輻輳が複数発生していない場合 （S 9 ： No) は、 直ち に接続制御量が決定され （S 1 2) 、 優先サービスが存在しない場合 （S 1 0 ： N o) においても直ちに接続制御量が決定される （S 1 2) 。  If it is determined that no congestion has occurred (S8: No), the measurement result is received (S7), and if no congestion has occurred (S9: No), immediately The connection control amount is determined (S12), and even when there is no priority service (S10: No), the connection control amount is immediately determined (S12).
なお、 接続呼数の測定の後にあふれ呼数が測定される構成としても良い。 The number of overflow calls may be measured after the number of connected calls is measured.
S 14において送信された輻輳制御情報は、 輻輳制御管理部 7により受信され (S 15) 、 制御元が決定され （S 1 6) 、 接続制御指示信号が生成され （S 1 7) 、 生成された接続制御指示信号が送信される （S 1 8) 。 The congestion control information transmitted in S14 is received by the congestion control management unit 7 (S15), the control source is determined (S16), a connection control instruction signal is generated (S17), and the congestion control information is generated. The transmitted connection control instruction signal is transmitted (S18).
送信された接続制御指示信号は、 呼接続制御部 9により受信され （S 1 9) 、 接続制御が行われる （S 20) 。  The transmitted connection control instruction signal is received by the call connection control unit 9 (S19), and connection control is performed (S20).
また、 上記のトラフィック制御装置が S I P (Session Initiation Protocol ) が用いられる通話制御信号を処理対象とする場合、 あふれ呼及び接続呼を測定 するにあたっては、 図 9の示す手順 （S 101から S 1 1 1 ) がふまれ、 図中の 応答コ一ドにより各判定が行われる。  When the traffic control device processes a call control signal using SIP (Session Initiation Protocol), when measuring the overflow call and the connected call, the procedure shown in FIG. 9 (from S101 to S11) is used. 1) is filled, and each judgment is made by the response code in the figure.
なお、 図中の応答コード 1 80は rRinging (呼び出し中） 」 、 応答コード 2 00は 「OK」 、 応答コード 401は runauthorized (認可されていない） 」 、 応答コード 407は rproxy Authentication Required (プロキシ認証が必要 ) J 、 応答コード 503は （"Service Unavailable (サービスを利用できない） 」 旨を示す。  Note that the response code 180 in the figure is rRinging (calling), the response code 200 is OK, the response code 401 is runauthorized (not authorized), and the response code 407 is rproxy Authentication Required. Necessary) J and response code 503 indicate ("Service Unavailable".)
また、 上記の応答コードは 百の位でその意味が分類されており、 図中の 4 x X (400番台） は 「リクエスト失敗応答 J 、 5 X X (500番台） は 「サーバ での失敗応答」 、 6 x x (600番台） は 「グロ一バル失敗応答」 を示す。  The above response codes are classified by their hundreds in meaning. In the figure, 4 x X (400s) is “Request failure response J, 5XX (500s)” is “Server failure response” , 6xx (600's) indicates "global failure response".
上記のようなトラフィック制御装置としては、 CPU (Central Processing Unit) 、 ハードディスクドライブ、 ROM (Read Onlv Memory) 、 RAM (Ran dom Access Memory) 、 キ一ボード、 ディスプレイ、 フレキシブルディスクドラ イブ、 通信ネットワークに接続して通信を行うための通信部等を有したコンビュ —タを用いることが可能である。 これにあたっては、 コンピュータに前述の各部 を機能を実行させるためのトラフィック制御プログラムを読み取らせ、 実行させ る。 Such traffic control devices include a CPU (Central Processing Unit), hard disk drive, ROM (Read Onlv Memory), RAM (Ran It is possible to use a computer having a dom access memory, a keyboard, a display, a flexible disk drive, and a communication unit for performing communication by connecting to a communication network. In this case, the computer is made to read and execute a traffic control program for executing the functions of the above-described units.
したがって、 上記のトラフィック制御プログラムと、 このプログラムを記録し たフレキシブルディスク、 C D— R O M (Compact D i sk Read On l y Memory) 、 P Cカード等のコンピュータで読み取リ可能なプ口グラム記録媒体も本発明の範 囲に含まれる。  Therefore, the traffic control program described above and a computer-readable program recording medium such as a flexible disk, a CD-ROM (Compact Disk Read Only Memory), a PC card, or the like on which the program is recorded are also provided by the present invention. Included in the range.
また、 このようなトラフィック制御装置を用いるトラフィック制御方法も本発 明の範囲に含まれる。 産業上の利用の可能性  A traffic control method using such a traffic control device is also included in the scope of the present invention. Industrial potential
本発明は、 I P網等の通信ネットワークにおける輻輳を解消若しくは防止する ためにトラフィックを制御する卜ラフィック制御装置、 トラフィック制御プログ ラム、 プログラム記録媒体及びトラフィック制御方法を提供する。 本発明では、 呼の接続数を制御するにあたっての接続制御量が含まれた輻輳制御情報を解析し 、 この接続制御量に基づいて、 加入者への呼に対して呼損処理を行うことにより 呼の接続数を制御するため、 輻輳の解消若しくは防止が可能となる。 また、 通信 ネッ卜ワーク上で送受される通話制御信号を抽出し、 輻輳若しくはその兆候が発 生しているか否かを一括して判定を行うため、 こうした判定を行うための手段を ネットワーク構成機器其々に設ける必要がなく、 コストの低減が可能となる。 こ のように、 トラフィックを正確に制御しながらコス卜を低減することができる。  The present invention provides a traffic control device, a traffic control program, a program recording medium, and a traffic control method for controlling traffic in order to eliminate or prevent congestion in a communication network such as an IP network. According to the present invention, congestion control information including a connection control amount for controlling the number of call connections is analyzed, and a call loss process is performed on a call to a subscriber based on the connection control amount. Since the number of call connections is controlled, congestion can be eliminated or prevented. Further, in order to extract a call control signal transmitted and received on a communication network and collectively determine whether or not congestion or a sign thereof has occurred, a means for performing such determination is provided by a network component. There is no need to provide them separately, and costs can be reduced. In this way, costs can be reduced while controlling traffic accurately.

Claims

請求の範囲 The scope of the claims
1 . 通信ネットワークにおける輻輳を解消するためにトラフィックを制御する トラフィック制御装置であって、 1. A traffic control device for controlling traffic to eliminate congestion in a communication network,
前記通信ネットワーク上で送受される通話制御信号を抽出する信号抽出手段と 前記抽出された通話制御信号を解析し、 加入者に対する単位時間あたリの呼の 接続数及び不完了呼数を測定する信号解析手段と、  A signal extracting means for extracting a call control signal transmitted / received on the communication network; and analyzing the extracted call control signal, and measuring the number of connected calls and the number of incomplete calls per unit time to the subscriber. Signal analysis means;
前記測定された不完了呼数と所定の閾値とを比較し、 該比較結果に基づいて輻 輳が発生しているか否かを判定し、 前記判定の結果、 輻輳が発生していると判定 された場合、 呼の接続数を制御するにあたっての制御量を決定し、 該制御量及び 前記加入者を特定するための情報を含む輻輳制御情報を生成する輻輳判定手段と 前記輻輳制御情報を解析し、 前記制御量に基づいて、 前記加入者への呼に対し て呼損処理を行うことにより呼の接続数を制御する少なくとも 1個の呼接続制御 手段と  The measured number of incomplete calls is compared with a predetermined threshold, and it is determined whether or not congestion has occurred based on the comparison result.As a result of the determination, it is determined that congestion has occurred. In this case, the control amount for controlling the number of call connections is determined, the congestion determination means for generating the control amount and congestion control information including information for specifying the subscriber, and the congestion control information are analyzed. At least one call connection control means for controlling the number of call connections by performing a call loss process on a call to the subscriber based on the control amount;
を有するトラフィック制御装置。  A traffic control device having:
2 . 前記呼接続制御手段を複数個有する場合、 2. When there are a plurality of the call connection control means,
前記輻輳判定手段から前記輻輳制御情報を受信し、 該輻輳制御情報に基づいて 呼の接続数を制御させるべき呼接続制御手段を特定し、 該特定された呼接続制御 手段に前記輻輳制御情報を送信する輻輳制御管理手段を有する請求項 1に記載の 卜ラフィック制御装置。  Receiving the congestion control information from the congestion determination means, specifying a call connection control means to control the number of call connections based on the congestion control information, and transmitting the congestion control information to the specified call connection control means. 2. The traffic control device according to claim 1, further comprising a congestion control management means for transmitting.
3 . 前記輻輳判定手段は、 複数の輻輳が発生していることが判定され、 且つ、 優先して解消又は防止すべき輻輳が定められている場合に、 前記複数の輻輳間の 優先順位を決定し、 前記制御量を決定するにあたって前記優先順位を用いる請求 項 1に記載のトラフィック制御装置。 3. The congestion determining means determines a priority order among the plurality of congestions when it is determined that a plurality of congestions have occurred, and when congestion to be eliminated or prevented with priority has been determined. The traffic control device according to claim 1, wherein the priority is used in determining the control amount.
4 . 前記呼接続制御手段は、 呼の接続数の制御を行った旨を記した指示応答信 号を生成するとともに、 前記通信ネットワークにおけるトラフィックを監視して 監視結果を示すトラフィック情報を生成し、 4. The call connection control means generates an instruction response signal indicating that the number of call connections has been controlled, monitors traffic in the communication network and generates traffic information indicating a monitoring result,
前記輻輳制御管理手段は、 前記指示応答信号及び前記トラヒック情報を前記呼 接続制御手段から受信し、 受信した指示応答信号及びトラフィック情報に基づい て制御状況情報を生成し、  The congestion control management means receives the instruction response signal and the traffic information from the call connection control means, generates control status information based on the received instruction response signal and traffic information,
前記輻輳判定手段は、 前記輻輳制御管理手段から前記制御状況情報を受信して 蓄積し、 輻輳が発生しているか否かの判定を行うにあたって蓄積された制御状況 情報を用いる請求項 2に記載のトラフィック制御装置。  The congestion determination unit according to claim 2, wherein the control status information is received and accumulated from the congestion control management unit, and the accumulated control status information is used to determine whether or not congestion has occurred. Traffic control device.
5 . 通信ネッ卜ワークにおける輻輳を防止するためにトラフィックを制御する トラフィック制御装置であって、 5. A traffic control device for controlling traffic to prevent congestion in a communication network,
前記通信ネットワーク上で送受される通話制御信号を抽出する信号抽出手段と 前記抽出された通話制御信号を解析し、 加入者に対する単位時間あたりの呼の 接続数及び不完了呼数を測定する信号解析手段と、  Signal extracting means for extracting a call control signal transmitted and received on the communication network; andsignal analysis for analyzing the extracted call control signal and measuring the number of call connections per unit time to the subscriber and the number of incomplete calls. Means,
前記測定された不完了呼数と所定の閾値とを比較し、 該比較結果に基づいて輻 輳の兆候が発生しているか否かを判定し、 前記判定の結果、 輻輳の兆候が発生し ていると判定された場合、 呼の接続数を制御するにあたっての制御量を決定し、 該制御量及び前記加入者を特定するための情報を含む輻輳制御情報を生成する輻 輳判定手段と、  The measured number of uncompleted calls is compared with a predetermined threshold, and it is determined whether or not a sign of congestion has occurred based on the comparison result.As a result of the determination, a sign of congestion has occurred. If it is determined that there is a congestion determination means for determining a control amount for controlling the number of call connections, and generating congestion control information including the control amount and information for specifying the subscriber,
前記輻輳制御情報を解析し、 前記制御量に基づいて、 前記加入者への呼に対し て呼損処理を行うことにより呼の接続数を制御する少なくとも 1個の呼接続制御 手段と  At least one call connection control unit that analyzes the congestion control information and controls the number of call connections by performing a call loss process on the call to the subscriber based on the control amount;
を有するトラフィック制御装置。  A traffic control device having:
6 . 前記呼接続制御手段を複数個有する場合、 6. When there are a plurality of the call connection control means,
前記輻輳判定手段から前記輻輳制御情報を受信し、 該輻輳制御情報に基づいて 呼の接続数を制御させるべき呼接続制御手段を特定し、 該特定された呼接続制御 手段に前記輻輳制御情報を送信する輻輳制御管理手段を有する請求項 5に記載の トラフィック制御装置。 Receiving the congestion control information from the congestion determining means, specifying a call connection control means for controlling the number of call connections based on the congestion control information, 6. The traffic control device according to claim 5, further comprising congestion control management means for transmitting the congestion control information to the means.
7 . 前記輻輳判定手段は、 複数の輻輳の兆候が発生していることが判定され、 且つ、 優先して解消又は防止すべき輻輳が定められている場合に、 前記複数の輻 輳の兆候間の優先順位を決定し、 前記制御量を決定するにあたって前記優先順位 を用いる請求項 5に記載のトラフィック制御装置。 7. The congestion determining means determines that a plurality of signs of congestion have occurred, and when congestion to be preferentially eliminated or prevented is determined, the congestion determining means determines whether the plurality of signs of congestion are present. The traffic control device according to claim 5, wherein the priority order is determined, and the priority order is used in determining the control amount.
8 . 前記呼接続制御手段は、 呼の接続数の制御を行った旨を記した指示応答信 号を生成するとともに、 前記通信ネッ卜ワークにおけるトラフィックを監視して 監視結果を示すトラフィック情報を生成し、 8. The call connection control means generates an instruction response signal indicating that the number of call connections has been controlled, and monitors traffic in the communication network to generate traffic information indicating a monitoring result. And
前記輻輳制御管理手段は、 前記指示応答信号及び前記トラヒック情報を前記呼 接続制御手段から受信し、 受信した指示応答信号及びトラフィック情報に基づい て制御状況情報を生成し、  The congestion control management means receives the instruction response signal and the traffic information from the call connection control means, generates control status information based on the received instruction response signal and traffic information,
前記輻輳判定手段は、 前記輻輳制御管理手段から前記制御状況情報を受信して 蓄積し、 輻輳の兆候が発生しているか否かの判定を行うにあたって蓄積された制 御状況情報を用いる請求項 6に記載のトラフィック制御装置。  7. The congestion determining unit receives the control status information from the congestion control management unit, stores the control status information, and uses the stored control status information in determining whether or not a sign of congestion has occurred. The traffic control device according to claim 1.
9 . 通信ネットワークにおける輻輳を解消するためにトラフィックを制御する トラフィック制御装置で用いられるトラフィック制御プログラムであって、 前記トラフィック制御装置を、 9. A traffic control program used in a traffic control device that controls traffic to eliminate congestion in a communication network, wherein the traffic control device includes:
前記通信ネットワーク上で送受される通話制御信号を抽出する信号抽出手段と 前記抽出された通話制御信号を解析し、 加入者に対する単位時間あたりの呼の 接続数及び不完了呼数を測定する信号解析手段と、  Signal extracting means for extracting a call control signal transmitted and received on the communication network; andsignal analysis for analyzing the extracted call control signal and measuring the number of call connections per unit time to the subscriber and the number of incomplete calls. Means,
前記測定された不完了呼数と所定の閾値とを比較し、 該比較結果に基づいて輻 輳が発生しているか否かを判定し、 前記判定の結果、 輻輳が発生していると判定 された場合、 呼の接続数を制御するにあたっての制御量を決定し、 該制御量及び 前記加入者を特定するための情報を含む輻輳制御情報を生成する輻輳判定手段と 前記輻輳制御情報を解析し、 前記制御量に基づいて、 前記加入者への呼に対し て呼損処理を行うことによリ呼の接続数を制御する少なくとも 1個の呼接続制御 手段 The measured number of incomplete calls is compared with a predetermined threshold, and it is determined whether or not congestion has occurred based on the comparison result.As a result of the determination, it is determined that congestion has occurred. Congestion determination means for determining a control amount for controlling the number of call connections, and generating congestion control information including the control amount and information for specifying the subscriber. At least one call connection control means for analyzing the congestion control information and performing a call loss process for a call to the subscriber based on the control amount to control the number of recall connections.
として機能させるトラフィック制御プログラム。  Traffic control program to function as a.
1 0 . 前記トラフィック制御装置が前記呼接続制御手段を複数個有する場合、 該トラフィック制御装置を、 前記輻輳判定手段から前記輻輳制御情報を受信し 、 該輻輳制御情報に基づいて呼の接続数を制御させるべき呼接続制御手段を特定 し、 該特定された呼接続制御手段に前記輻輳制御情報を送信する輻輳制御管理手 段として機能させる請求項 9に記載のトラフィック制御プログラム。 10. When the traffic control device has a plurality of the call connection control means, the traffic control device receives the congestion control information from the congestion determination means, and determines the number of call connections based on the congestion control information. 10. The traffic control program according to claim 9, wherein a call connection control means to be controlled is specified, and the specified call connection control means is caused to function as a congestion control management means for transmitting the congestion control information.
1 1 . 通信ネットワークにおける輻輳を防止するために卜ラフィックを制御す るトラフィック制御装置で用いられる卜ラフィック制御プログラムであって、 前記卜ラフィック制御装置を、 1 1. A traffic control program used in a traffic control device that controls traffic to prevent congestion in a communication network, the traffic control device comprising:
前記通信ネッ卜ワーク上で送受される通話制御信号を抽出する信号抽出手段と 前記抽出された通話制御信号を解析し、 加入者に対する単位時間あたりの呼の 接続数及び不完了呼数を測定する信号解析手段と、  A signal extracting means for extracting a call control signal transmitted and received on the communication network; and analyzing the extracted call control signal to measure the number of call connections per unit time to the subscriber and the number of incomplete calls. Signal analysis means;
前記測定された不完了呼数と所定の閾値とを比較し、 該比較結果に基づいて輻 輳の兆候が発生しているか否かを判定し、 前記判定の結果、 輻輳の兆候が発生し ていると判定された場合、 呼の接続数を制御するにあたっての制御量を決定し、 該制御量及び前記加入者を特定するための情報を含む輻輳制御情報を生成する輻 輳判定手段と、  The measured number of uncompleted calls is compared with a predetermined threshold, and it is determined whether or not a sign of congestion has occurred based on the comparison result.As a result of the determination, a sign of congestion has occurred. If it is determined that there is a congestion determination means for determining a control amount for controlling the number of call connections, and generating congestion control information including the control amount and information for specifying the subscriber,
前記輻輳制御情報を解析し、 前記制御量に基づいて、 前記加入者への呼に対し て呼損処理を行うことにより呼の接続数を制御する少なくとも 1個の呼接続制御 手段  At least one call connection control unit that analyzes the congestion control information and controls the number of call connections by performing a call loss process on a call to the subscriber based on the control amount;
として機能させるトラフィック制御プログラム。 1 2 · 前記トラフィック制御装置が前記呼接続制御手段を複数個有する場合、 該トラフィック制御装置を、 前記輻輳判定手段から前記輻輳制御情報を受信し 、 該輻輳制御情報に基づいて呼の接続数を制御させるべき呼接続制御手段を特定 し、 該特定された呼接続制御手段に前記輻輳制御情報を送信する輻輳制御管理手 段として機能させる請求項 1 1に記載の卜ラフィック制御プログラム。 Traffic control program to function as a. 1 2If the traffic control device has a plurality of the call connection control means, the traffic control device receives the congestion control information from the congestion determination means, and determines the number of call connections based on the congestion control information. 12. The traffic control program according to claim 11, wherein a call connection control means to be controlled is specified, and the specified call connection control means is caused to function as a congestion control management means for transmitting the congestion control information.
1 3 . 通信ネットワークにおける輻輳を解消するためにトラフィックを制御す るトラフィック制御装置で用いられる卜ラフィック制御プログラムを記録したプ ログラム記録媒体であって、 13 3. A program recording medium that records a traffic control program used in a traffic control device that controls traffic to eliminate congestion in a communication network,
前記トラフィック制御装置を、  The traffic control device,
前記通信ネッ卜ワーク上で送受される通話制御信号を抽出する信号抽出手段と 前記抽出された通話制御信号を解析し、 加入者に対する単位時間あたりの呼の 接続数及び不完了呼数を測定する信号解析手段と、  A signal extracting means for extracting a call control signal transmitted and received on the communication network; and analyzing the extracted call control signal to measure the number of call connections per unit time to the subscriber and the number of incomplete calls. Signal analysis means;
前記測定された不完了呼数と所定の閾値とを比較し、 該比較結果に基づいて輻 輳が発生しているか否かを判定し、 前記判定の結果、 輻輳が発生していると判定 された場合、 呼の接続数を制御するにあたっての制御量を決定し、 該制御量及び 前記加入者を特定するための情報を含む輻輳制御情報を生成する輻輳判定手段と 前記輻輳制御情報を解析し、 前記制御量に基づいて、 前記加入者への呼に対し て呼損処理を行うことにより呼の接続数を制御する少なくとも 1個の呼接続制御 手段  The measured number of incomplete calls is compared with a predetermined threshold, and it is determined whether or not congestion has occurred based on the comparison result.As a result of the determination, it is determined that congestion has occurred. In this case, the control amount for controlling the number of call connections is determined, the congestion determination means for generating the control amount and congestion control information including information for specifying the subscriber, and the congestion control information are analyzed. At least one call connection control means for controlling the number of call connections by performing a call loss process on a call to the subscriber based on the control amount;
として機能させるトラフィック制御プログラムを記録したプログラム記録媒体  Recording medium recording traffic control program to function as
1 4. 前記トラフィック制御装置が前記呼接続制御手段を複数個有する場合、 該トラフィック制御装置を、 前記輻輳判定手段から前記輻輳制御情報を受信し 、 該輻輳制御情報に基づいて呼の接続数を制御させるべき睥接続制御手段を特定 し、 該特定された呼接続制御手段に前記輻輳制御情報を送信する輻輳制御管理手 段として機能させるトラフィック制御プログラムを記録した請求項 1 3に記載の プログラム記録媒体。 1 4. When the traffic control device has a plurality of the call connection control means, the traffic control device receives the congestion control information from the congestion determination means, and determines the number of call connections based on the congestion control information. A congestion control manager for specifying an overriding connection control means to be controlled and transmitting the congestion control information to the specified call connection control means; 14. The program recording medium according to claim 13, wherein a traffic control program that functions as a step is recorded.
1 5 . 通信ネットワークにおける輻輳を防止するためにトラフィックを制御す るトラフィック制御装置で用いられるトラフィック制御プログラムを記録したプ ログラ厶記録媒体であって、 15. A program recording medium that records a traffic control program used in a traffic control device that controls traffic to prevent congestion in a communication network,
前記トラフィック制御装置を、  The traffic control device,
前記通信ネットワーク上で送受される通話制御信号を抽出する信号抽出手段と 前記抽出された通話制御信号を解析し、 加入者に対する単位時間あたりの呼の 接続数及び不完了呼数を測定する信号解析手段と、  Signal extracting means for extracting a call control signal transmitted and received on the communication network; andsignal analysis for analyzing the extracted call control signal and measuring the number of call connections per unit time to the subscriber and the number of incomplete calls. Means,
前記測定された不完了呼数と所定の閾値とを比較し、 該比較結果に基づいて輻 輳の兆候が発生しているか否かを判定し、 前記判定の結果、 輻輳の兆候が発生し ていると判定された場合、 呼の接続数を制御するにあたっての制御量を決定し、 該制御量及び前記加入者を特定するための情報を含む輻輳制御情報を生成する輻 輳判定手段と、  The measured number of uncompleted calls is compared with a predetermined threshold, and it is determined whether or not a sign of congestion has occurred based on the comparison result.As a result of the determination, a sign of congestion has occurred. If it is determined that there is a congestion determination means for determining a control amount for controlling the number of call connections, and generating congestion control information including the control amount and information for specifying the subscriber,
前記輻輳制御情報を解析し、 前記制御量に基づいて、 前記加入者への呼に対し て呼損処理を行うことによリ呼の接続数を制御する少なくとも 1個の呼接続制御 手段  At least one call connection control means for controlling the number of recall connections by analyzing the congestion control information and performing a call loss process on the call to the subscriber based on the control amount;
として機能させる卜ラフィック制御プログラムを記録したプログラム記録媒体  Recording medium storing a traffic control program to function as a computer
1 6 . 前記トラフィック制御装置が前記呼接続制御手段を複数個有する場合、 該トラフィック制御装置を、 前記輻輳判定手段から前記輻輳制御情報を受信し 、 該輻輳制御情報に基づいて呼の接続数を制御させるべき呼接続制御手段を特定 し、 該特定された呼接続制御手段に前記輻輳制御情報を送信する輻輳制御管理手 段として機能させるトラフィック制御プログラムを記録した請求項 1 5に記載の プログラム記録媒体。 16. When the traffic control device has a plurality of the call connection control means, the traffic control device receives the congestion control information from the congestion determination means, and determines the number of call connections based on the congestion control information. 16. The program recording according to claim 15, wherein a call connection control means to be controlled is specified, and a traffic control program for causing the specified call connection control means to function as a congestion control management means for transmitting the congestion control information is recorded. Medium.
1 7 . 通信ネットワークにおける輻輳を解消するために卜ラフィックを制御す るトラフィック制御装置を用いるトラフィック制御方法であって、 17. A traffic control method using a traffic control device for controlling traffic to eliminate congestion in a communication network,
前記トラフィック制御装置が、  The traffic control device,
前記通信ネットワーク上で送受される通話制御信号を抽出する信号抽出ステツ プと、  A signal extraction step for extracting a call control signal transmitted and received on the communication network;
前記抽出された通話制御信号を解析し、 加入者に対する単位時間あたリの呼の 接続数及び不完了呼数を測定する信号解析ステップと、  A signal analysis step of analyzing the extracted call control signal and measuring the number of connected calls and the number of incomplete calls per unit time for the subscriber;
前記測定された不完了呼数と所定の閾値とを比較し、 該比較結果に基づいて輻 輳が発生しているか否かを判定し、 前記判定の結果、 輻輳が発生していると判定 された場合、 呼の接続数を制御するにあたっての制御量を決定し、 該制御量及び 前記加入者を特定するための情報を含む輻輳制御情報を生成する輻輳判定ステツ プと、  The measured number of incomplete calls is compared with a predetermined threshold, and it is determined whether or not congestion has occurred based on the comparison result.As a result of the determination, it is determined that congestion has occurred. A congestion determination step of determining a control amount for controlling the number of call connections, and generating congestion control information including the control amount and information for identifying the subscriber;
前記輻輳制御情報を解析し、 前記制御量に基づいて、 前記加入者への呼に対し て呼損処理を行うことにより呼の接続数を制御する少なくとも 1個の呼接続制御 ステップと  Analyzing the congestion control information, based on the control amount, performing call blocking processing on the call to the subscriber to control at least one call connection control step of controlling the number of call connections; and
を実行するトラフィック制御方法。  Traffic control method to perform.
1 8 . 前記トラフィック制御装置が前記呼接続制御ステップを実行する呼接続 制御手段を複数個有する場合、 18. When the traffic control device has a plurality of call connection control means for executing the call connection control step,
前記トラフィック制御装置が、 前記輻輳制御情報を受信し、 該輻輳制御情報に 基づいて呼の接続数を制御させるべき呼接続制御手段を特定し、 該特定された呼 接続制御手段に前記輻輳制御情報を送信する輻輳制御管理ステツプを実行する請 求項 1 7に記載の卜ラフィック制御方法。 9 . 通信ネットワークにおける輻輳を解消するためにトラフィックを制御す るトラフィック制御装置を用いるトラフィック制御方法であって、  The traffic control device receives the congestion control information, specifies a call connection control unit that is to control the number of call connections based on the congestion control information, and specifies the congestion control information to the specified call connection control unit. 18. The traffic control method according to claim 17, wherein the traffic control method executes a congestion control management step of transmitting the traffic. 9. A traffic control method using a traffic control device that controls traffic to eliminate congestion in a communication network,
前記トラフィック制御装置が、  The traffic control device,
前記通信ネットワーク上で送受される通話制御信号を抽出する信号抽出ステツ プと、 前記抽出された通話制御信号を解析し、 加入者に対する単位時間あたりの呼の 接続数及び不完了呼数を測定する信号解析ス亍ップと、 A signal extraction step for extracting a call control signal transmitted and received on the communication network; A signal analysis step for analyzing the extracted call control signal and measuring the number of call connections and the number of incomplete calls per unit time for the subscriber;
前記測定された不完了呼数と所定の閾値とを比較し、 該比較結果に基づいて輻 輳の兆候が発生しているか否かを判定し、 前記判定の結果、 輻輳の兆候が発生し ていると判定された場合、 呼の接続数を制御するにあたっての制御量を決定し、 該制御量及び前記加入者を特定するための情報を含む輻輳制御情報を生成する輻 輳判定ステップと、  The measured number of uncompleted calls is compared with a predetermined threshold, and it is determined whether or not a sign of congestion has occurred based on the comparison result.As a result of the determination, a sign of congestion has occurred. If it is determined that there is a congestion determination step of determining a control amount for controlling the number of call connections, generating congestion control information including the control amount and information for identifying the subscriber,
前記輻輳制御情報を解析し、 前記制御量に基づいて、 前記加入者への呼に対し て呼損処理を行うことにより呼の接続数を制御する.少なくとも 1個の呼接続制御 ステップと  The congestion control information is analyzed, and based on the control amount, the number of call connections is controlled by performing a call loss process for the call to the subscriber.
を実行するトラフィック制御方法。  Traffic control method to perform.
2 0 . 前記トラフィック制御装置が前記呼接続制御ステップを実行する呼接続 制御手段を複数個有する場合、 20. When the traffic control device has a plurality of call connection control means for executing the call connection control step,
前記トラフィック制御装置が、 前記輻輳制御情報を受信し、 該輻輳制御情報に 基づいて呼の接続数を制御させるべき呼接続制御手段を特定し、 該特定された呼 接続制御手段に前記輻輳制御情報を送信する輻輳制御管理ステツプを実行する請 求項 1 9に記載のトラフィック制御方法。  The traffic control device receives the congestion control information, specifies a call connection control unit that is to control the number of call connections based on the congestion control information, and specifies the congestion control information to the specified call connection control unit. 30. The traffic control method according to claim 19, wherein the congestion control management step for transmitting the traffic is performed.
PCT/JP2004/004340 2003-03-31 2004-03-26 Traffic control device, traffic control program, program recording medium, and traffic control method WO2004098135A1 (en)

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JP4985435B2 (en) * 2008-01-30 2012-07-25 日本電気株式会社 Monitoring and analyzing apparatus, method, and program
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