WO2005079046A1 - 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、及びトラフィック制御方法 - Google Patents
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、及びトラフィック制御方法 Download PDFInfo
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- WO2005079046A1 WO2005079046A1 PCT/JP2004/001716 JP2004001716W WO2005079046A1 WO 2005079046 A1 WO2005079046 A1 WO 2005079046A1 JP 2004001716 W JP2004001716 W JP 2004001716W WO 2005079046 A1 WO2005079046 A1 WO 2005079046A1
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- WIPO (PCT)
- Prior art keywords
- call
- congestion
- traffic control
- connections
- traffic
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
- H04Q3/0062—Provisions for network management
- H04Q3/0091—Congestion or overload control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/36—Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/36—Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks
- H04M3/367—Traffic or load control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13034—A/D conversion, code compression/expansion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13166—Fault prevention
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13173—Busy signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13387—Call gapping
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13389—LAN, internet
Definitions
- the present invention relates to 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 (traffic volume) in an IP telephone system for performing telephone communication via an IP (Internet Protocol) network, a traffic control program, a program recording medium, and Regarding traffic control methods.
- traffic control device for controlling traffic (traffic volume) in an IP telephone system for performing telephone communication via an IP (Internet Protocol) network, a traffic control program, a program recording medium, and Regarding traffic control methods.
- IP Internet Protocol
- CTI Computer Telephony Integration
- the components of such an IP telephone system include a CTI-GW (Gateway) using the above-mentioned CTI technology, a soft switch for performing circuit switching, and the like.
- CTI-GW Gateway
- a soft switch for performing circuit switching and the like.
- IP telephone system when a large number of calls are concentrated to a specific destination at the same time, or when a large number of calls are made from a specific destination at the same time, these are sent to specific components. Concentration and congestion may occur.
- the function of the IP contact center may be stopped. If a large number of calls are concentrated on the soft switch, the function of the soft switch itself may be stopped, and also the function of the entire IP telephone system may be stopped.
- the present invention provides a traffic control device, a traffic control program, a program recording medium, and a traffic control device for providing a stable IP telephone service. It is an object to provide a traffic control method. Disclosure of the invention
- the traffic control device of the present invention is a traffic control device for controlling traffic in order to eliminate congestion that occurs when performing telephone communication via an IP network. It has call connection control means for controlling the number of call connections based on the call density, which is the number of call connections.
- the number of call connections is controlled based on a call density that is determined to eliminate congestion, so that a stable IP telephone service can be provided.
- the call is a SIP message using SIP as a communication protocol
- the call connection control means preferably specifies a call to control the number of connections based on the SIP message.
- SIP Session Initiation Protocol 1
- VoIP Voice over Internet Protocol
- the call connection control means specifies the congestion to be preferentially resolved based on a predetermined priority and controls the number of call connections that cause the congestion.
- the traffic control device of the present invention is a traffic control device that controls traffic in order to prevent the occurrence of congestion when performing telephone communication via an IP network, and is a unit time set to prevent congestion. It has call connection control means for controlling the number of call connections based on the call number density, which is the number of call connections per unit.
- a stable IP telephone service can be provided because the number of call connections is controlled based on a predetermined call density to prevent congestion. Becomes possible.
- the call is a SIP message using SIP as a communication protocol
- the call connection control means preferably specifies a call to control the number of connections based on the SIP message.
- a call to control the number of connections is made from a SIP message using SIP (Session Initiation Protocol 1), which is a call control protocol used in IP telephones that apply Voice over Internet Protocol (VoIP).
- SIP Session Initiation Protocol 1
- VoIP Voice over Internet Protocol
- the call connection control means specifies the congestion to be preferentially prevented based on a predetermined priority and controls the number of call connections that cause the congestion.
- the congestion that should be preferentially stopped on the basis of a predetermined priority is identified, and the number of calls that cause this congestion is controlled. Service can be provided.
- a traffic control program is a traffic control program used for a traffic control device that controls traffic in order to eliminate congestion that occurs when telephone communication is performed via an IP network. It functions as call connection control means for controlling the number of call connections based on the call density, which is the number of call connections per unit time determined to eliminate congestion.
- this traffic control program it is possible to provide a stable IP telephone service because the number of call connections is controlled based on a call density that is determined to eliminate congestion.
- the call is a SIP message using SIP as a communication protocol
- the call connection control means preferably specifies a call whose number of connections should be controlled based on the SIP message.
- a call to control the number of connections is made from a SIP message using SIP (Session Initiation Protocol 1), which is a call control protocol used in IP telephones that apply Voice over Internet Protocol (VoIP).
- SIP Session Initiation Protocol 1
- VoIP Voice over Internet Protocol
- the call connection control means specifies the congestion to be preferentially resolved based on a predetermined priority and controls the number of call connections that cause the congestion.
- the traffic control program according to the present invention is a traffic control program used for a traffic control device that controls traffic to prevent the occurrence of congestion when performing telephone communication via an IP network.
- the number of call connections is controlled based on the call density determined to prevent congestion, so that a stable IP telephone service can be provided.
- the call is a SIP message in which SIP is used as a communication protocol
- the call connection control means preferably specifies a call for which the number of connections should be controlled based on the SIP message.
- SIP Session Initiation Protocol 1
- VoIP Voice over Internet Protocol
- the call connection control means When there are a plurality of signs of congestion, it is preferable to cause the call connection control means to specify congestion to be preferentially prevented based on a predetermined priority, and to control the number of call connections that cause congestion.
- the congestion to be prevented is specified preferentially, and a stable IP service is established in order to control the number of call connections that cause the congestion. Can be provided.
- the program recording medium of the present invention is used for a traffic control device for controlling traffic in order to eliminate congestion that occurs when telephone communication is performed via an IP network.
- a traffic control program that functions as call connection control means for controlling the number is recorded.
- a traffic control program for controlling the number of call connections based on a predetermined call density to eliminate congestion is recorded, and the traffic recorded on this recording medium is recorded.
- a useful traffic control device can be realized only by reading the control program into a computer or the like.
- the call is a SIP message using SIP as a communication protocol
- the call connection control means record a traffic control program for specifying a call to control the number of connections based on the SIP message.
- a call to control the number of connections is identified from SIP messages using SIP (Session Initiation Protocol 1), which is a call control protocol used in IP telephones that apply Voice over Internet Protocol (VoIP).
- SIP Session Initiation Protocol 1
- VoIP Voice over Internet Protocol
- a useful traffic control device can be realized only by reading the traffic control program recorded on the recording medium into a computer or the like.
- the call connection control means specifies the congestion to be preferentially resolved based on a predetermined priority, and records a traffic control program for controlling the number of call connections that cause the congestion. Is preferred.
- a traffic control program that specifies the congestion to be preferentially resolved based on a predetermined priority and controls the number of call connections that cause the congestion is recorded.
- a useful traffic control device can be realized only by reading the traffic control program recorded on this recording medium into a computer or the like.
- the program recording medium of the present invention is a program recording medium that records a traffic control program used for a traffic control device that controls traffic in order to prevent congestion from occurring when telephone communication is performed via an IP network.
- the traffic control device must be able to connect the calls per unit time specified to prevent congestion.
- a traffic control program that functions as call connection control means for controlling the number of call connections based on the call density, which is a number, is recorded.
- a traffic control program for controlling the number of call connections based on a call density determined to prevent congestion is recorded.
- the traffic control program recorded on this recording medium is A useful traffic control device can be realized simply by reading it into a computer or the like.
- the call is a SIP message using SIP as a communication protocol
- the call connection control means record a traffic control program for specifying a call to control the number of connections based on the SIP message.
- a call to control the number of connections is identified from SIP messages using SIP (Session Initiation Protocol 1), which is a call control protocol used in IP telephones that apply Voice over Internet Protocol (VoIP).
- SIP Session Initiation Protocol 1
- VoIP Voice over Internet Protocol
- a useful traffic control device can be realized only by reading the traffic control program recorded on the recording medium into a computer or the like.
- a traffic control program for causing the call connection control means to identify the congestion to be preferentially prevented based on a predetermined priority and to control the number of call connections that cause congestion. It is preferable to record.
- a congestion to be preferentially prevented is specified based on a predetermined priority, and a traffic control program for controlling the number of call connections that cause the congestion is recorded.
- a useful traffic control device can be realized only by reading the traffic control program recorded on the recording medium into a computer or the like.
- a traffic control method is a traffic control method that uses a traffic control device that controls traffic in order to eliminate congestion that occurs when telephone communication is performed via an IP network.
- a call connection control step is performed to control the number of call connections based on the call density, which is the number of call connections per unit time determined to eliminate the problem.
- this traffic control method it is possible to reduce the congestion to a specified call density. Since the number of call connections is controlled based on this, stable IP telephone services can be provided.
- the call is a SIP message using SIP as a communication protocol
- the traffic control device preferably specifies, in the call connection control step, a call for which the number of connections should be controlled based on the SIP message.
- SIP Session Initiation Protocol 1
- VoIP Voice over Internet Protocol
- the traffic control device may specify the congestion that should be preferentially resolved based on a predetermined priority in the call connection control step, and control the number of call connections that cause the congestion. preferable.
- the traffic control method of the present invention is a traffic control method that uses a traffic control device that controls traffic in order to prevent the occurrence of congestion when performing telephone communication via an IP network. And performing a call connection control step of controlling the number of call connections based on a call density, which is a predetermined number of call connections per unit time to prevent congestion.
- a stable IP telephone service can be provided because the number of call connections is controlled based on the call density determined to prevent congestion.
- the call is a SIP message in which SIP is used as a communication protocol
- the traffic control device preferably specifies, in the call connection control step, a call whose number of connections is to be controlled based on the SIP message.
- a call to control the number of connections is identified from SIP messages using SIP (Session Initiation Protocol 1), which is a call control protocol used in IP telephones that apply Voice over Internet Protocol (VoIP). Therefore, it is possible to provide a stable IP telephone service. If there are multiple indications of congestion, the traffic control device identifies the congestion to be preferentially prevented based on a predetermined priority in the call connection control step, and controls the number of call connections that cause congestion Is preferred.
- SIP Session Initiation Protocol 1
- VoIP Voice over Internet Protocol
- the congestion to be prevented is specified preferentially, and a stable IP service is established in order to control the number of call connections that cause the congestion. Can be provided.
- a traffic control device, a traffic control program, and a traffic control method of the present invention control the number of call connections based on a call density determined to eliminate congestion, and provide a Vo IP (Voice over Internet Protocol).
- a call to control the number of connections is identified from SIP messages using SIP (Session Initiation Protocol), which is a protocol of the caller P used in IP phones etc. Identify the congestion that should be preferentially resolved based on the priority of the call, and control the number of call connections that cause this congestion. Therefore, a stable IP service can be provided.
- SIP Session Initiation Protocol
- the number of call connections is controlled based on the call density determined to prevent congestion, and SIP (Voice over Internet Protocol) Session Initiation Protocol) is used to identify calls whose connection number should be controlled from SIP messages. If there are multiple indications of congestion, identify the congestion that should be preferentially prevented based on a given priority. However, since the number of call connections that cause this congestion is controlled, stable IP services can be provided.
- SIP Voice over Internet Protocol
- the program recording medium of the present invention controls the number of call connections based on the call density determined to eliminate congestion, and is used in an IP telephone or the like to which VoIP (Voice over Internet Protocol) is applied. Identify calls to control the number of connections from SIP messages using SIP (Session Initiation Protocol), which is a communication control protocol that is used, and if multiple congestions occur, give priority to them based on a predetermined priority.
- SIP Session Initiation Protocol
- the traffic control program that specifies the congestion to be resolved and controls the number of call connections that cause congestion is recorded. Therefore, useful traffic control can be achieved simply by reading the traffic control program recorded on the recording medium into a computer or the like. The device can be realized.
- 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 a configuration of the congestion detection unit in FIG.
- FIG. 3 is a block diagram showing a configuration of the congestion control management unit in FIG.
- FIG. 4 is a block diagram showing the configuration of the call connection control unit in FIG.
- FIG. 5 is a diagram illustrating call connection control by the call connection control unit in FIG.
- FIG. 6 is a diagram showing an example of the SIP format.
- FIG. 7 is a diagram illustrating the operation of the congestion detection unit, the congestion control management unit, and the call connection control unit in FIG. 1 when congestion is resolved.
- FIG. 8 is a diagram illustrating the operation of the congestion detection unit, the congestion control management unit, and the call connection control unit of FIG. 1 when congestion is prevented.
- 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 congestion detection unit 2 provided in each of the soft switch 1 and the CTI GW 3, and a congestion control management device for managing a congestion control operation for eliminating or preventing congestion.
- 4 includes a congestion control management unit 5 provided in 4 and a call connection control unit 7 provided in a call connection control device 6 that performs call connection control based on data derived by the congestion control management device.
- the congestion detection unit 2 congests the congestion information including the information indicating the fact and the identification information (address and the like) of the terminal 8a associated with the congestion. It is sent to the control management unit 5. The details of the congestion detection unit 2 will be described later.
- the congestion control management unit 5 Upon receiving the congestion information, the congestion control management unit 5 determines the call density, which is the number of calls connected per unit time, determined to eliminate or prevent the congestion, and transmits a connection control instruction signal including the call density. Generated and transmitted to the call connection control unit 7. Details of the congestion control management unit 5 will be described later.
- the call connection control unit 7 which has received the connection control instruction signal, controls the number of calls connected to the terminal 8a based on the above-mentioned call density, thereby eliminating or preventing congestion.
- the details of the call connection control unit 7 will be described later.
- FIG. 2 is a block diagram showing a configuration of the congestion detection unit 2 in FIG.
- the congestion detection unit 2 includes a call concentration monitoring unit 21, a congestion determination unit 22, and congestion information transmission. Part 23.
- the call concentration monitoring unit 21 monitors the concentration of calls to the soft switch 1 or the CTI-GW3.
- the congestion determination unit 22 stores a predetermined threshold for eliminating congestion and a predetermined threshold for preventing congestion, and based on data collected by the call concentration status monitoring unit 21, If the number of calls per unit time is larger than the above-mentioned threshold value, it is determined that the concentration of calls to be measured is congestion or a sign of congestion.
- the congestion information transmitting section 23 generates congestion information based on the judgment of the congestion judging section 22, and transmits the congestion information to the congestion control management section 5.
- FIG. 3 is a block diagram showing a configuration of the congestion control management unit 5 of FIG.
- the congestion control supervision unit includes a congestion information receiving unit 51, a connection control execution determining unit 52, a connection control information reception storage unit 53, a connection control instruction signal generation unit 54, and a connection control instruction signal transmission unit. 5 and 5.
- the congestion information receiving unit 51 receives the congestion information transmitted from the congestion detection unit 2 in FIGS.
- connection control execution determining unit 52 Based on the congestion information received by the congestion information receiving unit 51, the connection control execution determining unit 52 performs various determination processes related to the elimination or prevention of congestion. The details of the determination process will be described later.
- connection control instruction signal 54 determines the call density when the connection control execution determination unit 52 determines that congestion is to be eliminated or prevented, and generates a connection control instruction signal. It has an instruction signal generating unit 54 and a connection control instruction signal transmitting unit 55 that transmits the generated connection control instruction signal to the call connection control unit 7.
- connection control information receiving section 53 receives and accumulates connection control information including the current connection control and the call density at this time. Receiving and storing connection control information is always performed.
- the connection control execution determining unit 52 makes a determination based on the connection control information, and the connection control instruction signal transmitting unit 54 determines the call density.
- connection control execution determination unit 52 Next, the determination processing by the connection control execution determination unit 52 will be described.
- the connection control execution determination unit 52 is a priority order that determines which congestion should be preferentially eliminated or prevented when multiple congestions occur or when there are multiple signs of congestion. Data is stored. For example, it is defined that congestion caused by concentration of calls at terminal 8a in FIG. 1 is eliminated first, and congestion caused by concentration of calls at terminal 8b in FIG. 2 is eliminated second. If congestion information indicating that congestion has occurred is received, it is determined that the former congestion should be preferentially eliminated based on the priority data.
- the connection control instruction signal transmitting unit 54 cancels the former congestion in accordance with the above-described determination, and sets the respective call density so that the call density at this time is higher than the call density for eliminating the latter congestion. To determine. The same processing as described above is performed when preventing congestion.
- connection control execution determination unit 52 refers to the above-described connection control information, and the congestion is resolved or prevented, even though connection control was performed in the past to resolve or prevent congestion. If not, the connection control signal generation unit 54 is instructed to change the call density and generate a new connection control instruction signal.
- FIG. 4 is a block diagram showing a configuration of the call connection control unit 7 of FIG.
- the call connection control unit 7 includes a connection control instruction signal reception unit 71, a connection control management unit 72, a call density control unit 73, a traffic measurement unit 74, and a connection control information transmission unit 75. Have.
- connection control instruction signal receiving section 71 receives the connection control instruction signal transmitted from the congestion control management section 5.
- the call density control unit 73 executes call density control based on the connection control instruction signal received by the connection control instruction signal receiving unit 71.
- the traffic measuring unit 74 measures traffic on the IP network.
- connection control management unit # 2 controls the call density control unit 73, and also stores the connection control information including the measurement result of the traffic measurement unit 74 and the call density when the call density control is performed. Generate.
- connection control information transmission unit 75 transmits the connection control information generated by the connection control management unit 72 to the congestion control management unit 5.
- the transmitted connection control information is stored in the connection control information reception / storage section 53 of FIG.
- the control target of the call connection control unit 7 in the present embodiment is Vo IP (Voice over I)
- Vo IP Voice over I
- SIP Session Initiation Protocol
- An example of the format of the SIP message is as shown in FIG. 6.
- the call connection control unit 7 extracts the INVITE message of the SIP message and specifies a call for which the number of connections is to be controlled.
- FIG. 5 is a diagram illustrating call connection control using an SIP message by the call connection control unit 7 in FIG.
- the call connection control unit 7 Upon receiving the connection control instruction signal, the call connection control unit 7 monitors all calls transmitted and received on the IP network, extracts the above-mentioned I NV ITE message, analyzes it, and performs a predetermined call density control. Do. At this time, the call connection processing and, if the number of calls exceeds a predetermined call density, connection of the surplus calls is not performed. This is called a call loss process.
- the figure shows a case where no processing is performed on a call using a protocol other than SIP.However, the present invention is not limited to this. It is also possible to provide a connection control unit and perform processing.
- FIG. 7 is a diagram illustrating the operation of the congestion detection unit 2, the congestion control management unit 5, and the call connection control unit 7 in FIG. 1 when congestion is resolved.
- Congestion detection is started by the congestion detection unit 2 (Sla), and when congestion is detected (S2a: Yes), congestion information is generated and transmitted (S3a).
- the congestion control manager 5 When the congestion information is received by the congestion control manager 5 (S4a), it is determined whether or not a plurality of congestions have occurred (S5a). If a plurality of congestions have occurred (S5a). a: Yes), it is determined whether or not there is congestion (priority service) to be preferentially eliminated (S6a), and if there is congestion to be preferentially eliminated (S6a) : Yes), the processing priority is determined (S7a), the call density (congestion control amount) for these is adjusted (S8a), and the congestion control amount (call density) is determined (S7a). S 9 a). The processing from S5a to S7a is performed based on the above-mentioned priority data.
- the control destination is determined based on these medium powers (S10a), and a connection control instruction signal is generated (S11a).
- the connection control instruction signal is transmitted to the call connection control unit 7 (S12a).
- the call connection control unit 7 Upon receiving the connection control instruction signal transmitted from the congestion control management unit 5 in S12 (S13a;), the call connection control unit 7 extracts an NVITE message (S14a), and It is determined whether or not the message is the appropriate message (S15a). If the message is the appropriate message (S15a: Yes), the call density control is performed (S16a). ), Connection control information relating to this is generated and transmitted to the congestion control management unit 5, and the congestion control management unit 5 receives this (S18a).
- FIG. 8 is a diagram showing the operation of the congestion detection unit 2, the congestion control management unit 5, and the call connection control unit 7 of FIG. 1 when congestion is prevented.
- the congestion detection unit 2 starts detecting a sign of congestion (Sib), and when a sign of congestion is detected (S2b: Yes), congestion information is generated and transmitted (S3b).
- the congestion information is received by the congestion control manager 5 (S4b)
- S5b: Yes it is determined whether or not there is congestion (priority service) to be preferentially prevented in the congestion that may be caused by these signs (S6b), and If there is congestion to be prevented (S6b: Yes), the processing priority is determined (S7b), and the call density (congestion control amount) for these is adjusted (S8b). Then, the congestion control amount (call density) is determined (S9b).
- the processing from S5b to S7b is performed based on the above-mentioned priority data.
- the control destination is determined from these mediums (S10b), a connection control instruction signal is generated (S11b), and the generated connection is generated.
- the control instruction signal is transmitted to the call connection control unit 7 (S12b).
- the call connection control unit 7 Upon receiving the connection control instruction signal transmitted from the congestion control management unit 5 in S12 (S13b), the call connection control unit 7 extracts an I NV ITE message (S14b), and extracts the extracted message. It is determined whether or not the message is the above-mentioned message (S15b). If the message is the above-mentioned message (S15b ⁇ Yes), call density control is performed (S16b ), Connection control information relating to this is generated and transmitted to the congestion control management unit 5, and the congestion control management unit 5 receives this (S18b).
- Whether the traffic control device of the present invention resolves congestion or prevents congestion can be freely set.
- the traffic control device of the present invention controls the number of connections in order to prevent congestion caused by the concentration of calls at the destination called A, but when congestion actually occurs without being able to prevent congestion for some reason. However, it is also possible to control both the number of call connections again and eliminate this congestion to perform both operations of eliminating congestion and preventing congestion.
- the traffic control device of the present invention includes a CPU, a hard disk drive (HDD), a ROM, a RAM, a keyboard, a display, a floppy disk drive (FDD), and a communication unit for connecting to an IP network for communication. It is possible to use a computer that has been optimized. In this case, the computer reads and executes the computer * program for realizing the functions of the above-described units. Therefore, this program and a computer-readable program recording medium that records this program are also included in the scope of the present invention.
- HDD hard disk drive
- ROM reads and executes the computer * program for realizing the functions of the above-described units. Therefore, this program and a computer-readable program recording medium that records this program are also included in the scope of the present invention.
- FDD floppy disk drive
- a traffic control method using such a traffic control device is also included in the scope of the present invention.
- a traffic control device, a traffic control program, and a traffic control method of the present invention determine the number of call connections based on a call density determined to eliminate congestion. Identifies calls to control the number of connections from SIP messages using SIP (Session Initiation Protocol), which is a call control protocol used in IP phones that apply Voice over Internet Protocol (VoIP) Then, when a plurality of congestions occur, the congestion to be preferentially resolved is specified based on a predetermined priority, and the number of call connections that cause the congestion is controlled. Therefore, stable IP services can be provided.
- SIP Session Initiation Protocol
- VoIP Voice over Internet Protocol
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- Telephonic Communication Services (AREA)
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PCT/JP2004/001716 WO2005079046A1 (ja) | 2004-02-17 | 2004-02-17 | 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、及びトラフィック制御方法 |
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PCT/JP2004/001716 WO2005079046A1 (ja) | 2004-02-17 | 2004-02-17 | 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、及びトラフィック制御方法 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10308967A (ja) * | 1997-05-09 | 1998-11-17 | Victor Co Of Japan Ltd | Lan構内交換機 |
JP2002077387A (ja) * | 2000-08-24 | 2002-03-15 | Nippon Telegr & Teleph Corp <Ntt> | 輻輳制御システムと輻輳制御方法およびその処理プログラムを記録した記録媒体 |
-
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10308967A (ja) * | 1997-05-09 | 1998-11-17 | Victor Co Of Japan Ltd | Lan構内交換機 |
JP2002077387A (ja) * | 2000-08-24 | 2002-03-15 | Nippon Telegr & Teleph Corp <Ntt> | 輻輳制御システムと輻輳制御方法およびその処理プログラムを記録した記録媒体 |
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