JP4818299B2 - Traffic control method, traffic control system, traffic management device and program in gateway device - Google Patents

Description

  The present invention relates to a traffic control method, a traffic control system, a traffic management device, and a program in a gateway device across a plurality of networks.

  In the conventional traffic control method, only a call control signal that flows in a home network to which each SIP server belongs is traffic-managed on a SIP (Session Initiation Protocol) server (see, for example, Patent Document 1). Specifically, when the call density per unit time reaches a certain number, control is performed so as to suppress outgoing calls from an IP (Internet protocol) terminal accommodated in the home network to which the SIP server belongs.

  FIG. 6 shows a configuration example of a conventional traffic control system, and shows an outline of the entire network system in a gateway device across a plurality of networks. As shown in FIG. 6, the traffic management apparatus 100 transmits traffic based on the call control signals from the IP terminals 12-1 and 12-2 such as IP telephones, that is, SIP messages, in the IP network A (17-1). Management is performed on the SIP servers 21a, 21b, and 21c. This is because SIP signals 19-1 sent from the IP terminals 12-1 and 12-2 to the gateway (GW) device 11 by the SIP servers 21 a, 21 b, and 21 c are used as information from the traffic management device 100. Contributes to suppression based. That is, in the conventional traffic control method, only SIP messages flowing on the home network to which the SIP servers 21a, 21b, and 21c belong are subjected to suppression control.

  On the other hand, the GW apparatus 11 of the IP network A (17-1) to which the SIP servers 21a, 21b, and 21c belong has the IP network B (17-2) and the public telephone networks 18-1 and 18-3 as the entire network system. And one or more other networks such as mobile phone networks 18-2 and 18-4. In such a network system, the GW apparatus 11 performs protocol conversion between ISUP (Integrated Services Digital Network User Part) signals 20-1 and 20-2 and SIP signals 19-1, 19-2, and 19-3. Realize the interconnection.

Japanese Patent Laid-Open No. 2004-088666

  As described above, conventionally, in order to avoid congestion in an IP phone, traffic of only a SIP message is monitored and notified to a controlling SIP server so that appropriate traffic distribution is performed within the network to which the SIP server belongs. Had been in control.

  However, if only SIP messages that flow on the network to which the SIP server belongs are only subject to traffic control, a large amount of traffic flows from other networks (for example, public telephone networks, mobile phone networks, other IP networks, etc.). Packets (or signals) cannot be controlled at the entrance of the network to which the SIP server itself belongs. For this reason, when one or more other networks are interconnected to form a network system in a gateway (GW) device, the burden on the GW device is effectively increased.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a gateway device that realizes effective traffic control at an interconnection point with one or more other networks, for example, a public telephone network, a cellular phone network, or another IP network. Is to provide a traffic control method, a traffic control system, a traffic management device and a program.

  A traffic control system according to a first aspect of the present invention includes a traffic management device associated with a network system (hereinafter also simply referred to as a network system) in a gateway (GW) device across a plurality of networks. The GW apparatus detects and counts the SIP signal (for example, INVITE message) transmitted from the SIP server and the ISUP signal (for example, the initial address message in the common line signal system) transmitted from the switch of other network. The traffic control is performed by applying a weight according to the number of signals. For example, irregularly in IP telephones, congestion due to a large amount of SIP signals, and the processing load of the GW device at a connection point with a different network are appropriately determined and notified to the traffic management device. Restrict the originating server or switch.

  The traffic control system according to the second aspect of the present invention includes an integrated traffic management apparatus that monitors traffic of all signals in the network system. The traffic management device weights both the ISUP signal and the SIP signal to calculate the load amount applied to the network system (that is, the total load amount of the GW device), and based on this calculated value, the traffic management device determines whether the traffic is adjacent or generated. A control signal amount for a side server or exchange (hereinafter referred to as an adjacent or originating system) is generated, and the control signal amount is transmitted to each adjacent or originating system. The adjacent or originating side system controls the traffic to the gateway device based on the control signal amount, and performs traffic control. Weighting is determined in advance as SIP: ISUP = n: m (n and m are arbitrary numbers). Furthermore, it is preferable to perform weighting according to signal type (type of audio signal, video signal, etc.). According to the traffic control system of the second aspect of the present invention, weighting is performed according to the processing amount of the network system, and protocols that are controlled differently according to traffic amount and signal type are dynamically controlled instead of being fixed. By doing so, it is possible to reduce the load on the GW apparatus that controls the network boundary.

  The traffic control system according to the third aspect of the present invention further includes a plurality of traffic management devices that monitor network-specific traffic in the network system. In order to enable traffic control by distributing and installing a plurality of traffic management devices, the traffic management of all signals in the network system is performed by the first traffic management device, and the traffic amount of each network in each of the other traffic management devices An appropriate control amount corresponding to the control amount is calculated, and a control instruction signal representing only the appropriate control amount is transmitted to each of the other traffic management devices installed in a distributed manner. That is, only the control information is transmitted and received without directly transmitting the status of the GW apparatus to the traffic management apparatus of another network (network of another provider). For example, when traffic control is performed in cooperation with a network different from PSTN and VoIP, cooperative control among a plurality of traffic management devices is realized, and information exchange between each traffic management device uses only a predetermined control instruction signal. Traffic information and server load information should not be used. By using only the common control instruction signal in this way, stable traffic control is realized, for example, so that other operators do not independently control and control the status of the GW device. To do.

That is, the traffic control method according to the present invention is a traffic control method for controlling traffic in a network system that realizes interconnection of signals of different signal systems in a plurality of networks via one or more gateway devices, The network system includes a traffic management device that communicates with the gateway device, and the processing procedure of the traffic management device includes the number of received signals for each network in the gateway device per unit time from the gateway device and the gateway. A step of collecting information on a load state in the device, a total load amount in the gateway device is calculated from the collected number of received signals and information on the load state, and a restriction on a control signal amount of traffic to be controlled for each network Generating a signal; and Sending a restriction signal of the amount to the exchange or server adjacent to the gateway device, and continuously collecting the information on the number of received signals and the load state to update or release the control signal amount. Steps to direct to,
It is characterized by including.

  In the traffic control method according to the present invention, the control signal amount is determined by a weighted distribution of a predetermined ratio with respect to the number of received signals for each network in consideration of a load state in the gateway device.

  In the traffic control method according to the present invention, the information collected by the traffic management device includes information on a signal type of a received signal, and the weighted distribution of the control signal amount is determined for each signal type. To do.

  In the traffic control method according to the present invention, the traffic management device includes a plurality of traffic management devices dedicated to each network, and one of the plurality of traffic management devices is a unit from the gateway device. Instead of collecting information on the number of received signals for each network in the gateway device per hour and the load state information for each network in the gateway device per time, the control signal is sent to the exchange or server instead of sending it to the exchange or server. A predetermined control instruction signal in which only information corresponding to the amount is described is sent to another traffic management device, and the other traffic management device performs traffic control corresponding to the calculated control signal amount based on the control instruction signal. The switch or the server is instructed.

  In the traffic control method according to the present invention, the processing procedure of the traffic management device further includes a step of instructing the gateway device to perform traffic control according to the number of received signals for each network in the gateway device. To do.

  Further, in the traffic control method according to the present invention, the traffic management apparatus calculates traffic load only for a specific network as a result of calculating the total load amount in the gateway apparatus, and the traffic control instructed to the gateway apparatus is also selected. And giving an instruction by giving a weighted distribution to the total load amount in the gateway device.

  Furthermore, a traffic control system according to the present invention is a traffic control system that controls traffic in a network system that realizes interconnection of signals of different signaling systems in a plurality of networks via one or more gateway devices, The network system includes a traffic management device that communicates with the gateway device. The traffic management device receives the number of received signals for each network in the gateway device per unit time from the gateway device and a load on the gateway device. Means for collecting state information, means for calculating a control signal amount of traffic to be controlled for each network from the collected number of received signals and load state information, and the collected number of received signals and load state Information on the gateway device as a whole Means for calculating a load amount and generating a restriction signal for a control signal amount of traffic to be controlled for each network; and means for sending the restriction signal for the control signal amount to an exchange or server adjacent to the gateway device; It is characterized by providing.

  Furthermore, the traffic management device according to the present invention is a traffic management device for managing the traffic of a network system that realizes interconnection of signals of different signaling systems in a plurality of networks via one or more gateway devices. The system includes a traffic management device that communicates with the gateway device, and from the gateway device, means for collecting information on the number of received signals for each network in the gateway device per unit time and load status information in the gateway device; Calculating a total load amount in the gateway device from the collected information on the number of received signals and the load state, and generating a control signal of a traffic control signal amount to be controlled for each network; and the control signal amount Control signals adjacent to the gateway device. And means for continuously sending information on the number of received signals and load status and instructing the switch or server to update or cancel the control signal amount. To do.

  Furthermore, the traffic control program according to the present invention allows the computer configured as the traffic management device of the present invention to send the number of received signals for each network in the gateway device per unit time and the load state in the gateway device from the gateway device. A step of collecting information, and a step of calculating a total load amount in the gateway apparatus from the collected information on the number of received signals and the load state, and generating a control signal of a traffic control signal amount to be controlled for each network And sending the control signal amount restriction signal to the exchange or server adjacent to the gateway device, and continuously collecting the information on the number of received signals and the load state to update or cancel the control signal amount For instructing the exchange or server It is characterized as a gram.

  According to the present invention, the traffic management device collects information on the number of input signals and the load state of the GW device from the GW device, and performs traffic control and regulation instructions for the entire network system, thereby enabling communication across different networks. In addition, stable operation can be obtained over the entire network, and as a result, user satisfaction is improved.

  Moreover, the state at the time of congestion can be calmed down early by automatic control. It can also be applied to control the distribution of signals that you want to communicate preferentially and signals that you want to regulate, and only specific services can be regulated end-to-end or connected with priority. This is particularly effective for emergency communications during disasters.

  Hereinafter, a traffic control system according to a first embodiment of the present invention will be described with reference to the drawings. In addition, in each figure, the same reference number is attached | subjected and demonstrated to the same component.

Example 1
The traffic control system according to the first embodiment controls traffic of a network system that realizes a network service using an IP telephone for establishing voice communication. The traffic control system according to the first embodiment includes a gateway (GW) device that realizes interconnection such as interworking with other networks (for example, between different operator networks), different signaling methods, and the number of signals from the GW device. A traffic management device that collects the load state of the GW device and controls and regulates the entire network.

  FIG. 1 shows a configuration example of a traffic control system according to an embodiment of the present invention. FIG. 1 shows an outline of an entire network system in a gateway device across a plurality of networks, and can be compared with the network system of FIG. 6 described above. As shown in FIG. 1, a gateway (GW) device 11 includes an IP network A (17-1), an IP network B (17-2), and a public telephone network 18- that accommodates telephones 13-1 and 13-2, respectively. 1 and 18-3, and mobile phone networks 18-2 and 18-4 that accommodate mobile phones 14-1 and 14-2, respectively, interworking signals between two or more networks to realize interconnection To do.

  Specifically, since the GW apparatus 11 performs protocol conversion or interconnection between the ISUP signal and the SIP signal, the IP network itself can be used as a telephone relay exchange, preferably using the Megaco protocol. it can. The GW device 11 has a function of measuring and holding the number of SIP signals 19-1, 19-2, 19-3 per unit time flowing into or out of the GW device 11 from each server in each IP network. A function of transmitting information on the number of held SIP signals to the traffic management device 10 and ISUP signals 20-1 and 20 per unit time flowing into and out of the GW device 11 from the IGS 15-1 and 15-2. -2 for measuring and holding the number of signals, and a function for transmitting information on the number of held ISUP signals 20-1 and 20-2 to the traffic management apparatus 10.

  Further, the traffic management device 10 receives information on the number of received signals for each network in the gateway device 11 per unit time and the load status information in the GW device 11 (signal amount and / or CPU usage rate of each network) from the GW device 11. Traffic to be controlled for each network based on the means for collecting parameterized information such as memory usage) and the collected number of received signals and load state information (can include signal type information). The total load amount in the GW apparatus 11 is calculated from the means for calculating the control signal amount and the collected number of received signals and the load state information, and the control signal amount of the traffic control signal amount to be controlled for each network is generated. And a means for sending a control signal amount restriction signal to an exchange or server adjacent to the GW apparatus 11. The traffic control system according to the first embodiment realizes stable quality control by performing control over the entire network in accordance with traffic and server processing conditions. Therefore, the traffic management device 10 can acquire the parameterized information such as the signal amount of each network and / or the CPU usage rate or the memory usage rate from the GW device 11, and can grasp the operation status of the network system. Then, after comprehensively judging traffic from these parameters, it is possible to generate a restriction signal for each adjacent or originating server or exchange. In the present embodiment, a network system using one GW apparatus 11 will be described. However, it goes without saying that it can be configured using a plurality of GW apparatuses. In this case, the traffic management device 10 can be configured to manage the load state in all or part of the other GW devices, similarly to the case where one GW device is used.

  The SIP servers (for example, SIP servers 21a, 21b, and 21c) accommodate the user's IP terminals 12-1 and 12-2 and perform connection control in the IP network (for example, IP network A (17-1)). It is a server.

  IGS (Interconnect Gateway Switch) 15-1 and 15-2 are gateway exchanges connected to a network of another operator.

  The HTTP server 22-1, the mail server 22-2, and the VoD (Video on Demand) server 22-3 are service servers used for providing various services, and are, for example, a domain controller with the IP terminal 12-2. A connection (DC connection) is established, and a SIP signal is transmitted / received in, for example, the IP network A (17-1).

  As described above, the traffic management device 10 collects information including the number of received signals from the GW device 11 and the load state of the GW device 11, manages the traffic in the entire network system, and manages the adjacent or originating server or It is a device that issues a restriction instruction to the exchange. The GW apparatus 11 transmits a SIP signal (for example, an INVITE message) transmitted from the SIP server and an ISUP signal (for example, an initial address message in the common line signal system) transmitted from a switch of another network per unit time. It detects and counts, and notifies the traffic management apparatus 10. This notification may be parameterized information such as the signal amount of each network and / or CPU usage rate or memory usage rate. The traffic management device 10 performs weighting according to the number of signals, generates a restriction signal for each adjacent or originating server or exchange, and sends the restriction signal to the adjacent or originating server or exchange. The adjacent or originating server or exchange performs traffic control based on the restriction signal.

  As described above, the traffic management device 10 appropriately determines the congestion at the IP telephone, congestion due to a large amount of SIP signals, and the load state of the connection point (GW device 11) with a different network, and the adjacent or originating side Restrictions can be placed on servers or switches.

  In the example of the network system shown in FIG. 1, the IP network provides a service that enables voice communication by establishing voice communication using a call control protocol and transmitting / receiving voice data to / from other networks as IP packets. And Although it is necessary to secure stable communication to perform such a service, the operation of the traffic control system according to the first embodiment will become apparent from the following description of the processing flow.

  Hereinafter, a processing flow of the traffic control system according to the first embodiment will be described.

(Processing flow)
In order to explain the schematic processing flow, the GW apparatus 11 receives inputs from the IP network A (17-1), the public telephone network (18-1 to 18-4), and the IP network B (17-2). The signals are collected and sent to the traffic management device 10. The traffic management device 10 grasps the total signal amount per unit time entering the GW device 11 and the load amount of the GW device 11, performs weighted distribution according to the signal amount for each network, and assigns each distribution amount. Based on this, a restriction signal for each network is generated, and each restriction signal is sent to a server or an exchange for each network. The server or switch for each network performs traffic flow control based on this restriction signal. At this time, the server or exchange for each network can select whether or not to pass according to the traffic volume and the signal type (type of audio signal, video signal, etc.). In order to perform traffic control according to the signal type, it is preferable to perform fixed connection restriction during the restriction period. For SIP signals, the signal type can be easily determined by a known method. Therefore, the traffic management device 10 acquires information on the signal type together with information on the processing load from the GW device 11, determines the control signal amount according to the load state and the signal type, and generates a restriction signal for each network. You can also.

  Hereinafter, a specific processing flow of the traffic control system according to the first embodiment will be described in more detail.

  First, the GW apparatus 11 performs steady monitoring of traffic and the system (steps S1a, S1b, S1c). Next, the GW apparatus 11 per unit time, load state parameters such as its own CC usage rate (or CPU usage rate of each server) for each network at a specific time, and the number of received signals per unit time Are measured and analyzed (steps S2a, S2b, S2c). Hereinafter, the INVITE message in the SIP signal that is a call connection request signal and each received signal of an IAM (Initial Address Message) that functions as an address message in the ISUP signal are detected and focused as control target signals (step S3a, S3b, S3c). Although the INVITE message and IAM will be described as an example, the received signals to be collected need not be limited to these message signals.

  Next, as a result of measuring the number of received signals in each network, the GW apparatus 11 determines whether or not the load amount applied to the GW apparatus 11 exceeds a predetermined threshold based on the load state parameter for each network. Information including the number of received signals and the load amount in the network exceeding the threshold value is notified to the traffic management apparatus 10 (step S4).

  Next, the traffic management device 10 calculates the total load amount in the entire network system related to the GW device 11 from the information including the notified number of received signals and the load amount. Next, the traffic management device 10 weights the number of received signals in both the ISUP signal and the SIP signal for each server of each network, and calculates the control signal amount for each network from the total load applied to the GW device 11. (Step S5).

  This weighting is a ratio between the SIP signal and the ISUP signal corresponding to the processing amount in the GW apparatus 11 for each signal processing. For example, SIP signal: ISUP signal = n: m (n and m are arbitrary numbers) ), The traffic management device 10 calculates the total load applied to the GW device 11. If the ratio is 1: 1, the weighting process may be omitted and may be added as it is. Further, the traffic management device 10 sets a signal type for each received signal of information acquired from the GW device 11, for example, a type such as a voice connection request (audio signal) or a video connection request (video signal) in the SIP signal or ISUP signal. Reading and adding to the weighting process as needed.

  Next, the traffic management device 10 determines whether or not the traffic control is necessary by determining whether or not the value is equal to or greater than a predetermined threshold based on the calculated total load amount. When the traffic management device 10 determines that the traffic control is necessary because the total load amount is equal to or greater than a predetermined threshold value, an adjacent or originating system (for example, a server or an exchange) connected to the GW device 11 A control signal amount as a signal amount to be controlled to flow into the GW device 11 from each network, and a control signal to which the control signal amount is assigned is generated as a traffic amount control instruction. (For example, a server or an exchange) (steps S6, S7a, S7b, S7c).

  For example, when the traffic management apparatus 10 determines that the number of received signals notified from the GW apparatus 11 exceeds a certain threshold and traffic control is necessary, the traffic management apparatus 10 causes the GW apparatus 11 to reduce the load on the GW apparatus 11. The amount of traffic from the adjacent or originating system (for example, server or exchange) connected to the GW apparatus 11 is distributed. For example, as an example of distribution, SIP server: SIP server = α: β (connected to the GW apparatus 11 at a predetermined ratio in the adjacent or originating system (depending on the processing capability of each server or exchange) The restriction signal is generated so that α and β are arbitrary numbers.

  If the traffic management device 10 determines that traffic control is not necessary, the traffic management device 10 does not give a control instruction to each server or exchange even if it receives a notification of the number of received signals from the GW device 11.

  Next, each adjacent or originating system (for example, a server or an exchange) that has received a control signal amount as a control instruction distributes the traffic amount for each signal type and performs traffic control (steps S8a, S8b, S8c). ). That is, the adjacent or originating system (for example, a server or an exchange) connected to the GW apparatus 11 distributes the traffic amount to be controlled according to the signal type based on the received control signal amount control signal. Implement control.

  The traffic management device 10 continuously receives information from the GW device 11 to monitor the traffic in the entire network system, and controls the amount of control signal based on the processing in steps S5 to S7a, S7b, and S7c described above. The control signal amount update or release instruction signal is transmitted to each adjacent or originating system (for example, a server or an exchange) that has already instructed control.

  Specifically, the traffic management device 10 continuously receives information from the GW device 11 and information including the number of received signals and the load amount (information on only the number of received signals, information on only the load amount, or information on both of them) ) To determine whether or not the control signal amount needs to be updated or canceled for an adjacent or originating system (for example, a server or an exchange) connected to the GW device 11, and based on the determination, a new control signal amount or The restriction release is determined, and an instruction signal based on the determined control signal amount or the restriction release is sent to an adjacent or originating system (for example, a server or an exchange).

  For example, when the number of received signals and the load amount notified from the GW device 11 are equal to or less than a predetermined threshold, that is, when the traffic amount toward the GW device 11 is equal to or less than the predetermined threshold, the traffic management device 10 It is determined that there is no problem even if the release is performed, and a control instruction to release the restriction is issued to an adjacent or originating system (for example, a server or an exchange) connected to the GW apparatus 11.

  When each adjacent or originating system (for example, a server or an exchange) connected to the GW apparatus 11 receives a newly instructed control signal amount, it controls the traffic amount based on the updated control signal amount. To implement.

  Alternatively, each adjacent or originating system (for example, a server or an exchange) connected to the GW apparatus 11 performs the deregulation of traffic control when receiving newly instructed deregulation information. .

  When the traffic management device 10 issues a traffic regulation release instruction to each adjacent or originating system (for example, a server or an exchange) connected to the GW device 11, the traffic management device 10 shifts to a steady monitoring state.

  As a result, the traffic control system according to the first embodiment can stably operate the entire network even in communication across different networks.

  Next, a traffic control system according to a second embodiment of the present invention will be described.

(Example 2)
The traffic control system according to the second embodiment controls traffic of a network system that realizes a network service using an IP telephone for establishing voice communication. As shown in FIG. 3, the traffic control system according to the second embodiment is a gateway (GW) device that realizes interworking such as interworking with other networks (for example, between different operator networks) and with different signal systems. 11, the first traffic management device 30-1 that collects the number of signals from the GW device 11 and the load state of the GW device 11, issues a restriction instruction to the entire network, and controls traffic exclusively for the IP network A, and a public telephone A second traffic management device 30-2 that performs traffic control exclusively for the network, a third traffic management device 30-3 that performs traffic control exclusively for the mobile phone network, and a fourth traffic management device 30 that performs traffic control exclusively for other IP networks B -4, and the first traffic management device 30-1 transmits / receives a predetermined control instruction signal to / from other traffic management devices. , It controls the traffic of the entire network system.

  That is, as compared with the traffic control system of the first embodiment in which one traffic management device manages the traffic of the entire network system, the traffic control system of the second embodiment is different for each IP network, public telephone network, and mobile phone network. The difference is that a plurality of functioning traffic management apparatuses are configured. An example of a control instruction signal used by each traffic management device of the second embodiment is shown in FIG. As shown in FIG. 5, the control instruction signal used by each traffic management device includes parameters including an operator code, a control target device name, a control target detail unit, and a control amount. For convenience of explanation, each traffic management device will be described as an individual device. However, each traffic management device may be configured separately for each function in one traffic device.

  In the traffic control system according to the second embodiment, the second to fourth traffic management devices 30-2, 30-3, and 30-4 on the receiving side of the control instruction signal each manage traffic based on the received control instruction signal. It is possible to efficiently perform traffic management by executing a control instruction to an adjacent or originating system (for example, a server or an exchange) connected to the apparatus. Note that the first traffic management device 30-1 manages the traffic information managed by itself, the load information of the GW device 11, or the traffic information in the GW device 11 with the second to fourth traffic management devices 30-2, 30-. 3, 30-4 is not transmitted, for example, and other operators do not use the control instruction signal to independently determine and control the status of the GW apparatus 11.

  On the other hand, when the first traffic management device 30-1 does not need to perform traffic management covering all classes, only a specific IP network including the GW device 11 (for example, only the IP network A (17-1)). You can also manage traffic in In this case, the first traffic management device 30-1 can perform independent control without performing cooperation with other traffic management devices.

  Hereinafter, a specific processing flow of the traffic control system according to the second embodiment will be described in more detail.

  As shown in FIG. 3, the first traffic management device 30-1 manages the traffic of the IP network A (17-1), and enters the GW device 11 in the same manner as the traffic management device 10 of the first embodiment. Grasping the total signal amount and load amount per unit time. The second to fourth traffic management devices 30-2, 30-3, and 30-4 function as a public telephone network control function unit, a mobile phone network control function unit, and an IP network B control function unit, respectively. It operates in cooperation with the 1 traffic management device 30-1. Hereinafter, although described as an example of such a configuration, a larger number of network function units may be used. Even in this case, the control instruction signals are transmitted and received between the functional units, but the traffic information and the load information of the GW apparatus 11 itself are not transmitted at this time as well.

  The processing before step S5 of the second embodiment is the same as that of the first embodiment, and a description thereof is omitted.

  In step S6a, the first traffic management device 30-1 determines whether or not the calculated total load amount is equal to or greater than a predetermined threshold, and determines whether or not traffic control is necessary, as in the first embodiment. When the first traffic management device 30-1 determines that traffic control is necessary, the first traffic management device 30-1 distributes it to the adjacent or originating system (for example, a server or an exchange) connected to the GW device 11, and each network. As a signal amount to be controlled to flow into the GW device 11, a control signal amount as a traffic amount control instruction is assigned to each network.

  At the time of this control instruction, the first traffic management device 30-1 performs distribution to each network so that, for example, the fourth traffic management device (IP network B control function unit) does not perform traffic control. Can do.

  In this case, the first traffic management device 30-1 (IP network A control function unit) sends a control instruction signal to the second traffic management device 30-2 (public telephone network control function unit). Thus, each traffic management device controls the traffic of the network managed by itself based on the control instruction signal (steps 7b and 7c in the second embodiment). However, in this example, it is noted that the first traffic management device 30-1 is responsible for traffic management of the IP network A (step S7a in the second embodiment).

  The second traffic management device 30-2 (public telephone network control function unit) receives the control instruction signal and uses the analyzed value to exchange the GW device 11 with respect to the switch belonging to the public telephone network (for example, IGS 15-1). Instructs traffic control for. If the first traffic management device 30-1 determines that traffic control is not necessary, the first traffic management device 30-1 does not issue a control instruction to other traffic management devices even if it receives information from the GW device 11.

  The processes after steps S8a, S8b, and S8c are the same as those in the first embodiment. For example, the first traffic management device 30-1 determines that the control target system to be distributed is an exchange in the public telephone network. The case will be described representatively.

  The exchange belonging to the public telephone network controls the traffic amount based on the control instruction signal from the second traffic management device 30-2 (public telephone line control function unit) (step S8b in the second embodiment).

  Next, the first traffic management device 30-1 (IP network A control function unit) adjusts the control signal amount from the continuous monitoring of the network system based on the information of the GW device 11, and the second traffic that has already been instructed to control. A control instruction signal is sent to the management apparatus 30-2 (public telephone network control function unit) to instruct to update or cancel the control signal amount. In response to the control instruction signal, the second traffic management device 30-2 (public telephone network control function unit) updates the control signal amount of the traffic amount toward the GW device 11 to the exchange belonging to the public telephone network. Give instructions.

  Thereby, the exchange belonging to the public telephone network can update the control signal amount of the traffic amount toward the GW apparatus 11.

  For example, in the first traffic management device 30-1, when the number of received signals and the load amount notified from the GW device 11 are equal to or smaller than a predetermined threshold, that is, the traffic amount toward the GW device 11 is equal to or smaller than the predetermined threshold. In this case, it is determined that there is no problem even if the restriction is released, and a control instruction signal for releasing the restriction is sent to the second traffic management device 30-2 (public telephone network control function unit). In response to this, the second traffic management device 30-2 (public telephone network control function unit) instructs the exchange belonging to the public telephone network to release the restriction. In response to this, the exchange belonging to the public telephone network releases the restricted state for the GW apparatus 11.

  When the first traffic management device 30-1 issues a traffic regulation release instruction to each of the other traffic management devices connected to the GW device 11, the first traffic management device 30-1 shifts to a normal monitoring state.

  As a result, the traffic control system according to the second embodiment can provide a stable service over the entire network even in communication across different networks.

  Next, a traffic control system according to a third embodiment of the present invention will be described.

(Example 3)
The traffic control system of the third embodiment can be realized with the same configuration as the traffic control system of the first or second embodiment, and detailed description thereof is omitted. In the third embodiment, traffic control according to incoming calls for each network in the GW apparatus 11 is realized. In the following description, in order to help understanding of the invention, the description will be given with reference to FIG. 2 again in contrast to the processing flow in the first embodiment.

  The processing flow of the third embodiment is the same as the processing before step S5 of the first embodiment, and a description thereof will be omitted.

  Similar to the first embodiment, the traffic management device 10 determines whether or not the calculated total load amount is equal to or greater than a predetermined threshold, determines whether or not the traffic control is necessary, and determines that the traffic control is necessary. In this case, as a signal amount to be distributed to adjacent or originating systems (for example, servers or exchanges) connected to the GW apparatus 11 and to be controlled to flow into the GW apparatus 11 from the respective networks, as traffic volume control instructions Are sent to the adjacent or originating system (for example, server or exchange) (steps S6, S7a, S7b, S7c). Similar to the first embodiment, the traffic management device 10 does not give a control instruction to each server even if it receives a notification of the number of received signals from the GW device 11 when determining that traffic control is unnecessary.

  However, in the third embodiment, when the traffic management apparatus 10 performs traffic control with the GW apparatus 11 and a single IP network (for example, the IP network A (17-1)), the traffic is also transmitted to the GW apparatus 11. The control instruction is performed. Specifically, the traffic management apparatus 10 calculates the total value of the number of SIP signals and the number of ISUP signals per unit time as a control instruction to the GW apparatus 11, and the total value is equal to or greater than a predetermined threshold value. For example, traffic control only for incoming calls from the IP network A (17-1) to the GW apparatus 11, traffic control only for incoming calls from the public telephone network 18-1, for example, or both incoming calls. Control is instructed to perform incoming traffic control with the ratio AA: BB (AA and BB are arbitrary numbers).

  Upon receiving this control instruction, the GW apparatus 11 discards the connection request signal (for example, the INVITE message in the SIP signal), or transmits a disconnection signal or a connection rejection signal corresponding to the connection request signal to the calling server or the like. Thus, the GW apparatus 11 operates to reduce the processing load of itself.

  For other processing, the processing in the first embodiment is also applied to the GW apparatus 11.

  For example, the traffic management device 10 continuously monitors the traffic amount in the GW device 11, re-adjusts the traffic amount in the GW device 11, and updates the traffic control amount in the GW device 11 instructed last time.

  On the other hand, the traffic management device 10 can instruct the GW device 11 to release the restriction. For example, when the number of received signals and the load amount notified from the GW device 11 are equal to or less than a predetermined threshold, the traffic management device 10 determines that there is no problem even if the restriction is canceled, and the GW device 11 cancels the restriction. The control instruction is performed.

  When the traffic management device 10 instructs the GW device 11 to cancel the traffic restriction, the traffic management device 10 shifts to a steady monitoring state.

  As a result, the traffic control system according to the third embodiment manages the traffic in the GW apparatus and the adjacent or originating system (for example, a server or an exchange), and therefore more effectively in communication across different networks. Service can be provided stably.

  In each embodiment described above, the traffic management device can be realized by a computer. A computer that is configured as a traffic management apparatus includes a central processing unit (CPU) and at least one memory in order to implement the above-described processes.

  Furthermore, in order to make the computer configured as the traffic management device function, a program to be executed by the CPU can be stored in a predetermined area of the memory. In addition, data required for realizing each process described above can be temporarily or permanently stored in a memory. Such a memory can be constituted by a ROM, a RAM, a hard disk, or the like inside the computer, or can be constituted by using an external storage device (for example, an external hard disk).

  Although the above embodiments have been described as representative examples, it will be apparent to those skilled in the art that many variations and substitutions can be made within the spirit and scope of the invention. For example, the traffic management device can be configured to be incorporated in the GW device. Needless to say, the embodiment of the traffic control system can also be characterized as a traffic control method, a traffic management device, or a traffic control program. Accordingly, the invention should not be construed as limited by the embodiments described above, but only by the claims.

  INDUSTRIAL APPLICABILITY The present invention can greatly reduce the burden on the gateway device, and is useful for a network system using gateway devices that straddle a plurality of networks.

It is a figure which shows the structural example of the traffic control system of Example 1 by this invention. It is a figure which shows the processing flow in the traffic control system of Example 1 by this invention. It is a figure which shows the structural example of the traffic control system of Example 2 by this invention. It is a figure which shows the processing flow in the traffic control system of Example 2 by this invention. It is a figure which shows an example of the control instruction | indication signal used for the traffic control system of Example 2 by this invention. It is a figure which shows the structural example of the conventional traffic control system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Traffic management apparatus 11 Gateway (GW) apparatus 12-1, 12-2 IP terminal 13-1, 13-2 Telephone 14-1, 14-2 Mobile telephone 15-1, 15-2 IGS
17-1 IP network A
17-2 IP network B
18-1, 18-3 Public telephone networks 18-2, 18-4 Cellular telephone networks 19-1, 19-2, 19-3 SIP signals 20-1, 20-2 ISUP signals 21a, 21b, 21c SIP server 22 -1 HTTP server 22-2 Mail server 22-3 VoD server 30-1 1st traffic management device 30-2 2nd traffic management device 30-3 3rd traffic management device 30-4 4th traffic management device 100 Traffic management device

Claims (9)

A traffic control method for controlling traffic in a network system that realizes interconnection of signals of different signal systems in a plurality of networks via one or more gateway devices,
The network system includes a traffic management device that communicates with the gateway device,
The processing procedure of the traffic management device is as follows:
Collecting, from the gateway device, information on the number of received signals for each network in the gateway device per unit time and load status information in the gateway device;
Calculating a total load amount in the gateway device from the collected number of received signals and load state information, and generating a control signal of a traffic control signal amount to be controlled for each network;
Sending a restriction signal of the control signal amount to an exchange or server adjacent to the gateway device;
Continuously collecting information on the number of received signals and load status and instructing the exchange or server to update or cancel the control signal amount; and
A traffic control method comprising:   2. The traffic control method according to claim 1, wherein the control signal amount is determined by a weighted distribution of a predetermined ratio with respect to the number of received signals for each network in consideration of a load state in the gateway device. The information collected by the traffic management device includes information on the signal type of the received signal,
3. The traffic control method according to claim 2, wherein the weighted distribution of the control signal amount is determined for each signal type.   The traffic management device includes a plurality of traffic management devices dedicated to each network, and one of the plurality of traffic management devices is transmitted from the gateway device to each network in the gateway device per unit time. Instead of sending information on the number of received signals and load status for each network in the gateway device, and sending the calculated control signal amount to an exchange or server, a predetermined description describing only the information corresponding to the control signal amount is described. A control instruction signal is transmitted to another traffic management apparatus, and the other traffic management apparatus instructs the exchange or the server based on the control instruction signal to perform traffic control corresponding to the calculated control signal amount. The traffic control method according to any one of claims 1 to 3.   The processing procedure of the traffic management device further includes a step of instructing the gateway device to perform traffic control according to the number of received signals for each network in the gateway device. The traffic control method according to one item.   As a result of calculating the total load amount in the gateway device, the traffic management device can perform traffic control instructing the gateway device with respect to the total load amount in the gateway device even when selecting traffic control for only a specific network. 6. The traffic control method according to claim 5, wherein an instruction is given with weighted distribution. A traffic control system for controlling traffic in a network system that realizes interconnection of signals of different signal systems in a plurality of networks via one or more gateway devices,
The network system includes a traffic management device that communicates with the gateway device,
The traffic management device
Means for collecting, from the gateway device, the number of received signals for each network in the gateway device per unit time and load state information in the gateway device;
Means for calculating a control signal amount of traffic to be controlled for each network from the collected number of received signals and load state information;
Means for calculating the total load amount in the gateway device from the collected information on the number of received signals and the load state, and generating a restriction signal of the traffic control signal amount to be controlled for each network;
Means for sending a control signal amount restriction signal to an exchange or server adjacent to the gateway device;
A traffic control system comprising: A traffic management device that manages traffic of a network system that realizes interconnection of signals of different signaling systems in a plurality of networks via one or more gateway devices,
The network system includes a traffic management device that communicates with the gateway device,
Means for collecting, from the gateway device, the number of received signals for each network in the gateway device per unit time and load state information in the gateway device;
Means for calculating the total load amount in the gateway device from the collected information on the number of received signals and the load state, and generating a restriction signal of the traffic control signal amount to be controlled for each network;
Means for sending a control signal amount restriction signal to an exchange or server adjacent to the gateway device;
Means for continuously collecting information on the number of received signals and load status and instructing the exchange or server to update or release the control signal amount;
A traffic management device comprising: A computer configured as the traffic management device according to claim 8,
Collecting, from the gateway device, information on the number of received signals for each network in the gateway device per unit time and load status information in the gateway device;
Calculating a total load amount in the gateway device from the collected number of received signals and load state information, and generating a control signal of a traffic control signal amount to be controlled for each network;
Sending a restriction signal of the control signal amount to an exchange or server adjacent to the gateway device;
Continuously collecting information on the number of received signals and load status and instructing the exchange or server to update or cancel the control signal amount; and
A traffic control program for executing

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