JP2014027484A - Network monitoring device, network monitoring program, and network monitoring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To calculate accurate estimation values of the number of accommodation users and the number of influenced users in each network component of a monitoring target.SOLUTION: In a monitoring system 300, a traffic collection unit 33 collects information showing the number of registration users for each domain and traffic information for each monitoring target network component from a traffic collection device and a registration user management device, and an operation unit 34 acquires the traffic information for each monitoring target network component, traffic information for each domain including the monitoring target network component, and information on the number of registration users corresponding to each domain, from the traffic collection unit 33. In the operation unit 34, a calculation unit for the number of estimated accommodation users calculates the number of estimated accommodation users, which is an estimation value of the number of accommodation users for each monitoring target network component, by proportionately dividing the number of registration users corresponding to each domain using a ratio of the sum of the traffic information for each monitoring target network component and the sum of the traffic information for each domain.

Description

  The present invention is presumed to be affected by the number of users estimated to actually use a monitored network component in a monitoring operation business of a communication network system, or a failure occurring in the monitored network component. The present invention relates to a technique for calculating the number of users to be used.

Conventionally, for example, there is a communication network system that provides a predetermined communication service to a communication terminal used by a registered user using a communication network (Internet network, mobile communication network, fixed communication network, etc.).
Such a communication network system includes a plurality of network devices having various functions in order to provide various services and to distribute processing. Also, network communication systems that provide services to registered users for a fee often have a detour route for fault tolerance.

  In addition, with the widespread use of such communication network systems, price competition has begun, and network devices tend to be generalized and low in price. Therefore, functions related to monitoring tend to be deleted for cost reduction. Specifically, the function for calculating the number of users using each network device (hereinafter referred to as the number of accommodated users) and the number of users affected by the failure of each network device (hereinafter referred to as the number of affected users) are calculated. It is difficult to install functions and the like in each network device.

On the other hand, in order to accurately grasp the damage situation from the impact of the service level agreement and the Great East Japan Earthquake, there is an increasing need to immediately report the number of users affected when a failure occurs in each network device to customers and the government. Yes.
As a solution to this problem, for example, an operation support system (OSS) is introduced, and the importance level of each network device constituting the network system is displayed by the OSS. Also, the contents of alarms and probe information are obtained by OSS, and the presence or absence of the influence on the service when a failure such as a failure occurs is estimated by OSS or manually. However, these monitoring operations are based on the early recovery from failures and the presence or absence of the impact on services, and the calculation of the number of users accommodated by each network device and the number of users affected by failures occurring in each network device. The calculation was not reached.

Further, as a technique for obtaining the influence at the time of failure occurrence, for example, Patent Document 1 discloses a technique for displaying the influence at the time of trouble occurrence by inputting in advance the importance of failure and the ratio of affected users. Yes.
In addition, for example, in Patent Document 2, when a facility (generic name including facilities and devices) constituting a network fails, a failure time and a failure time are calculated for the currently failed facility from the past similar failure cases and the number of reports. A technique for calculating the degree of influence of a failure by the product of the number of affected users is disclosed.

JP2011-257968A JP 2011-40954 A

  However, in the prior art disclosed in Patent Document 1, the number of users on the network changes momentarily (dynamically), such as a mobile communication network system or a general home ISP (Internet Services Provider) that is not always connected. In a network environment, there is a problem in that current estimates of the number of accommodated users and the number of affected users cannot be measured correctly.

  In a connection environment where a communication terminal used by a user (hereinafter referred to as a user communication terminal) is frequently disconnected from the network, such as a network system using a mobile communication network system or an Internet network for general users, The number of accommodated users varies by time. Therefore, in such a network environment, it is difficult to estimate the number of accommodated users and the number of affected users with high accuracy when the current time and the time of the past failure case do not match with the prior art of Patent Document 2 above. Become. In addition, when there are no similar failure cases in the past as in a large-scale disaster, it is difficult to estimate the number of accommodated users and the number of affected users.

Further, among network devices constituting the communication network system, network devices that do not manage registered users cannot grasp the number of accommodated users. Even if a function for grasping the number of accommodated users is given to this network device, there is a possibility that the correct number of users cannot be grasped in the faulty network device. Moreover, an increase in cost due to the addition of such a function is inevitable.
The present invention has been made to solve such a problem, and is a network monitoring device suitable for calculating a highly accurate estimated value of the number of accommodated users and the number of affected users for each network component to be monitored. An object of the present invention is to provide a network monitoring program and a network monitoring method.

[Form 1]
In order to solve the above-described problem, the network monitoring apparatus according to the first aspect of the present invention relates to a plurality of network components constituting a communication network system that provides a predetermined communication service to a communication terminal used by a registered user. A network monitoring device that monitors network components to be monitored,
The communication network system includes, as part of the plurality of network components, a registered user management device that is a device that manages registered users for each domain that is a management range on the network, and information relating to traffic of the network component A traffic information collecting device that is a device for collecting
A registered user number information acquisition unit that acquires information indicating the number of registered users corresponding to the domain to which each of the monitored network components belongs, from the registered user management device;
A monitoring unit traffic information acquisition unit for acquiring monitoring unit traffic information, which is information relating to traffic between the communication terminal and the network component in the network component unit to be monitored, from the traffic information collection device;
A domain unit traffic information acquisition unit that acquires domain unit traffic information, which is information relating to traffic between the communication terminal in domain units to which the network component to be monitored belongs and the network component from the traffic information collection device. When,
Information indicating the number of registered users acquired by the registered user number information acquisition unit, and the monitoring unit traffic information and the domain unit traffic information acquired by the monitoring unit traffic information acquisition unit and the domain unit traffic information acquisition unit Based on the number of registered users corresponding to the domain to which each of the monitored network components belongs, for each monitored network component, the numerical value relating to the traffic of the monitored network component unit, An estimated accommodated user who calculates an estimated accommodated user number, which is an estimated value of the number of registered users using the communication service, corresponding to each of the monitored network components, and is distributed in proportion to a numerical value related to traffic. And a number calculation unit.

  With such a configuration, the registered user number acquisition unit acquires information indicating the number of registered users in domain units from the registered user management apparatus. The monitoring unit traffic information acquisition unit acquires monitoring unit traffic information, which is traffic information in units of network components to be monitored, from the traffic information collection device. In addition, the domain unit traffic information acquisition unit acquires domain unit traffic information that is domain unit traffic information from the traffic information collection device. When the information indicating the number of registered users, the monitoring unit traffic information, and the domain unit traffic information are acquired, the estimated accommodated user number calculating unit converts the registered user number in the domain unit into the traffic in the network component unit to be monitored. The estimated number of accommodated users is calculated by proportionally dividing the numerical value and the numerical value related to the traffic in domain units.

Thereby, since the estimated number of accommodated users can be calculated based on the traffic with the user communication terminal, there is an effect that the estimated value of the number of accommodated users who are actually using the service can be accurately calculated. can get.
Here, the registered user refers to, for example, personal information (phone number, address, name, e-mail address, etc.) in a server or the like that manages the network system in order to use a predetermined communication service provided by the communication network system. ) Or the like.

[Form 2]
Furthermore, in the network monitoring device of aspect 2, in contrast to the configuration of aspect 1, the communication network system includes a bypass route that is a communication route that can bypass the monitored network component that has failed. ,
A detour route information acquisition unit that acquires detour route information that is information related to the detour route;
Based on the number of accommodated users calculated by the estimated accommodated user number calculation unit and the detour route information acquired by the detour route information acquisition unit, for each network component to be monitored, each network component to be monitored An estimated influential user number calculating unit for calculating an estimated influential user number, which is the number of registered users estimated to be affected by the disability when a failure occurs,
The estimated influence user number calculation unit subtracts the estimated influence user number from the estimated accommodated user number by subtracting the number of registered users corresponding to the communication terminal that can avoid the influence of the failure by using the bypass route. It is characterized by calculating.

In such a configuration, the number of registered users that are affected by a failure that occurred in a monitored network component by subtracting the number of registered users that can avoid a failure by using a bypass route from the estimated number of accommodated users. As a result, it is possible to calculate the estimated number of users who are estimated values.
Thereby, it is possible to calculate the estimated value of the number of affected users with high accuracy.

[Form 3]
Furthermore, the network monitoring device of mode 3 has a network configuration in which the plurality of network components are hierarchically connected for each function, in contrast to the configuration of mode 2 above.
The monitoring unit traffic information acquisition unit acquires, as the monitoring unit traffic information, information related to traffic of all the lowermost network components under each of the monitored network components,
The domain unit traffic information acquisition unit acquires, as the domain unit traffic information, information related to traffic of all lowermost network components belonging to the same domain as the domain to which each of the monitored network components belongs,
The estimated accommodated user number calculation unit calculates the number of registered users corresponding to the domain as a sum of numerical values related to traffic of all the lowermost network components under the monitoring target network component and the domain. The estimated number of accommodated users is calculated by dividing the ratio with the sum of the numerical values related to the traffic of all the lowermost network components to which it belongs.

With such a configuration, the monitoring unit traffic information acquisition unit, in a network having a configuration in which a plurality of network components are connected in a hierarchy, has the network component of the lowest layer under the network component to be monitored. Information related to traffic can be acquired as monitoring unit traffic information. Furthermore, the domain unit traffic information acquisition unit can acquire information related to the traffic of all the lowermost network components under the domain as domain unit traffic information.
Since the lowest layer network component is the first component to be connected to the communication terminal used by the user, it is possible to obtain more accurate information by acquiring information related to traffic between the lowest layer component and the communication terminal. An effect is obtained that a high estimated number of accommodated users can be calculated.

[Form 4]
Furthermore, in the network monitoring device of mode 4, the detour route information acquisition unit is configured so that the detour route information is the lowermost network configuration under each of the network components to be monitored as the detour route information. Of the communication routes corresponding to the number of communication routes including the detour route of the element, and the communication route corresponding to the communication route number information, the lowermost network component is the network component to be monitored. Obtaining other route utilization ratio information, which is information related to the ratio of using the network component to be monitored that is not affected by the failure that has occurred and another network component of the same layer as a detour destination;
The estimated influence user number calculation unit uses the bypass route according to the following formula (1) based on the communication route number d based on the communication route number information and the other route use rate dr based on the other route use rate information. Calculating an area coefficient, which is a coefficient for reducing the number of registered users that can avoid the influence of the failure, and multiplying the number of accommodated users by calculating the estimated influence user number. To do.
Area coefficient = (1-dr) ^d-1 (1)

  In such a configuration, the avoidance route information acquisition unit acquires, for example, traffic information capable of grasping a dynamically changing communication route as communication route number information, and as other route use ratio information, for example, communication It is possible to acquire traffic information generated when the communication route indicated by the route number information is used. Then, the estimated influence user number calculation unit calculates the area coefficient using these acquired traffic information, thereby calculating the estimated influence user number with higher accuracy even in an environment where the number of communication routes dynamically changes. It becomes possible to do. As the communication route number information, static network configuration information can be acquired when the number of communication routes is not dynamically converted.

[Form 5]
Furthermore, in the network monitoring device of aspect 5, in contrast to the configuration of aspect 3 or 4, the communication network system provides a predetermined communication service by wireless communication to the mobile communication terminal used by the registered user. A body communication network system,
The mobile communication network system includes, as part of the plurality of network components, a plurality of radio base stations, a plurality of radio areas formed by the radio base stations, and the radio base stations in each radio area. A plurality of cells that are the lowermost network components formed in
The monitoring unit traffic information acquisition unit acquires, as the monitoring unit traffic information, information related to traffic of all the cells under the network component to be monitored,
The domain unit traffic information acquisition unit acquires, as the domain unit traffic information, information related to traffic of all the cells belonging to the same domain as the domain to which the monitored network component belongs.
With such a configuration, it is possible to obtain an effect that it is possible to calculate the estimated number of accommodated users and the estimated number of affected users with high accuracy in the mobile communication network system.

[Form 6]
Further, in the network monitoring device of mode 6, in contrast to the configuration of mode 5, the plurality of radio base stations form an overlay area in which a plurality of cells having different carrier frequencies are present in the same radio area. And
The bypass route includes a communication route for handing over from one cell in the overlay area to another cell having a different carrier frequency from the cell,
A corresponding terminal ratio information storage unit that stores corresponding terminal ratio information that is information indicating a corresponding ratio of the mobile communication terminal with respect to a combination of carrier frequencies of the other cell that is a handover destination from the one cell; ,
Based on the corresponding terminal ratio information corresponding to each cell under each of the monitored network components stored in the corresponding terminal ratio information storage unit, the estimated influence user number calculation unit is calculated from the number of accommodated users. The estimated number of affected users is calculated by reducing the number of registered users that can avoid the influence of the failure by using a detour route by the overlay area.

  In such a configuration, in a mobile communication network, when there are a plurality of overlay cells in the wireless area, the number of registered users who can avoid the influence of the failure by the overlaid cells is calculated. In this calculation, it is possible to subtract from the estimated number of accommodated users. As a result, in a configuration in which handover can be performed to a cell having a different carrier frequency by overlay, such as a W-CDMA communication network, an effect that the number of estimated influence users can be calculated more accurately can be obtained.

[Form 7]
Furthermore, in the network monitoring device in mode 7, the registered user number information acquisition unit, the monitoring unit traffic information acquisition unit, and the domain unit traffic information acquisition unit in the configuration of any one of the above modes 3 to 6, In a preset time period, execute the acquisition process of the registered user number information, the monitoring unit traffic information and the domain unit traffic information corresponding to each of the monitored network components.
The estimated accommodated user number calculation unit and the estimated influence user number calculation unit are configured to monitor the network configuration of the monitoring target based on the registered user number information acquired in the time period, the monitoring unit traffic information, and the domain unit traffic information. Calculating the number of accommodated users and the estimated number of affected users in a preset time unit corresponding to each element;
A first time information acquisition unit that acquires first time information that is time information at the time of acquiring the registered user number information, the monitoring unit traffic information, and the domain unit traffic information;
The estimated influential user number corresponding to each of the monitoring target network components calculated by the estimated influential user number calculation unit is used as the monitoring unit traffic information and the domain unit traffic information used for calculating the estimated influential user number. An estimated influence user number storage unit that stores the corresponding first time information in association with the first time information;
When it is determined that a failure has occurred in the monitored network component, a second time information acquisition unit that acquires second time information that is time information at the time of the failure;
Based on the second time information acquired by the second time information acquisition unit, from the estimated influence user number storage unit to the first time information that matches an acquisition condition set in advance for the second time information. An estimated influential user number acquisition unit that acquires the corresponding estimated influential user number.

In such a configuration, the estimated influence user number storage unit is the first acquisition time of 1 traffic information in which the estimated influence user number calculated in a preset time period is used to calculate the estimated influence user number. It is stored in association with time information. When the second time information acquisition unit determines that a failure has occurred in the network component to be monitored, second time information that is time information at the time of the failure is acquired. Then, the estimated influence user number acquisition unit acquires the estimated influence user number corresponding to the first time information that matches the acquisition condition set in advance for the second time information from the estimated influence user number storage unit.
As a result, it is possible to acquire the estimated number of affected users that matches the acquisition conditions related to the traffic information acquisition time and the failure occurrence time. Therefore, it is possible to obtain the estimated number of affected users corresponding to a situation that more closely matches the situation affected by the failure at the failure occurrence time.

[Form 8]
Furthermore, in the network monitoring device according to aspect 8, in contrast to the configuration according to aspect 7, the first time information and the second time information include at least information on a month, a day, a day of the week, and a time.
When the estimated influence user number acquisition unit determines that the day indicated by the second time information is a weekday or Sunday, the same day of the week and the nearest time as the second time information of the most recent weekday or Sunday in the past. If the estimated influence user number corresponding to one time information is acquired as the estimated influence user number that matches the acquisition condition, and it is determined that the day indicated by the second time information is a holiday, the second in the last holiday in the past The estimated influence user number corresponding to the first time information at the time closest to the time indicated by the time information is acquired as the estimated influence user number that matches the acquisition condition.

Here, the above-mentioned “weekday” means Monday to Saturday other than the holidays described later. Moreover, the above-mentioned “holiday” means a national holiday. The term “holiday” refers to a day that a public institution establishes as a general rule that it will be closed for the execution of duties and operations, such as Sundays, public holidays, New Year holidays, and Bon holidays.
If it is such a structure, if the estimated influence user number acquisition part determines that the day when the failure occurred is a weekday (Monday to Saturday) or Sunday, the day when the failure occurred in the past weekdays or Sunday in the past It is possible to acquire the estimated influence user number corresponding to the acquisition time of traffic information of the same day of the week and the nearest time as the estimated influence user number that matches the acquisition condition. In addition, if it is determined that the day when the failure occurred is a holiday, the estimated influence corresponding to the acquisition condition is the estimated influence number corresponding to the traffic information acquisition time at the time closest to the failure occurrence time on the most recent holiday in the past. It can be acquired as the number of users.
Thereby, the effect that the estimated influence user number corresponding to the situation close | similar to the transition of the population on a weekday, a holiday, etc. can be acquired from the estimated influence user number memorize | stored in the estimated influence user number memory | storage part.

[Form 9]
Furthermore, in order to achieve the above object, the network monitoring program according to the ninth aspect of the present invention provides a plurality of network components constituting a communication network system that provides a predetermined communication service to a communication terminal used by a registered user. A network monitoring program that is executed in a computer provided in a network monitoring device that monitors network components to be monitored,
The communication network system includes, as part of the plurality of network components, a registered user management device that is a device that manages registered users for each domain that is a management range on the network, and information relating to traffic of the network component A traffic information collecting device that is a device for collecting
A registered user number information acquisition step for acquiring information indicating the number of registered users corresponding to the domain to which each of the monitored network components belongs, from the registered user management device;
A monitoring unit traffic information acquisition step for acquiring monitoring unit traffic information, which is information relating to traffic between the communication terminal and the network component in the network component unit to be monitored, from the traffic information collection device;
Domain unit traffic information acquisition step of acquiring domain unit traffic information, which is information relating to traffic between the communication unit in the domain unit to which the network component to be monitored belongs and the network component from the traffic information collection device When,
Information indicating the number of registered users acquired in the registered user number information acquisition step, and the monitoring unit traffic information and the domain unit traffic information acquired in the monitoring unit traffic information acquisition step and the domain unit traffic information acquisition step. Based on the number of registered users corresponding to the domain to which each of the monitored network components belongs, for each monitored network component, the numerical value relating to the traffic of the monitored network component unit, An estimated accommodated user who calculates an estimated accommodated user number, which is an estimated value of the number of registered users using the communication service, corresponding to each of the monitored network components, and is distributed in proportion to a numerical value related to traffic. A number calculating step, Characterized in that it comprises a program to be executed by the computer.
With such a configuration, when the program is read by the computer and the computer executes processing according to the read program, the same operation and effect as those of the network monitoring device according to the first aspect can be obtained.

[Form 10]
In order to achieve the above object, the network monitoring method according to the tenth aspect of the present invention includes a plurality of network components constituting a communication network system that provides a predetermined communication service to a communication terminal used by a registered user. A network monitoring method using a network monitoring device that monitors network components to be monitored,
The communication network system includes, as part of the plurality of network components, a registered user management device that is a device that manages registered users for each domain that is a management range on the network, and information relating to traffic of the network component A traffic information collecting device that is a device for collecting
A registered user number information acquisition step in which the network monitoring device acquires information indicating the number of registered users corresponding to the domain to which each of the monitored network components belongs, from the registered user management device;
Monitoring unit traffic in which the network monitoring device acquires monitoring unit traffic information that is information relating to traffic between the communication terminal and the network component in the network component unit to be monitored from the traffic information collection device An information acquisition step;
The network monitoring device acquires domain unit traffic information, which is information related to traffic between the communication terminal in the domain unit to which the network component to be monitored belongs and the network component from the traffic information collection device. A domain unit traffic information acquisition step;
Information indicating the number of registered users acquired by the network monitoring device in the registered user number information acquisition step, and the monitoring unit traffic information and domain acquired in the monitoring unit traffic information acquisition step and the domain unit traffic information acquisition step Based on the unit traffic information, for each monitored network component, the number of registered users corresponding to the domain to which each monitored network component belongs, and a numerical value related to the traffic in the monitored network component unit, The estimated number of accommodated users, which is an estimated value of the number of registered users using the communication service, corresponding to each of the monitored network components, is prorated according to the ratio with the numerical value related to the traffic in domain units. Estimated number of accommodated users to be calculated Characterized in that it comprises Tsu and up, the.
Thereby, the same operation and effect as those of the network monitoring device of mode 1 can be obtained.

1 is a block diagram showing a schematic configuration of a communication network system 1. FIG. It is a block diagram which shows the specific structural example of the communication network 100 which concerns on 1st Embodiment. It is a figure which shows the specific structural example of the communication network 100 in case an NW component has a function which collects traffic information in addition to an original function. 2 is a block diagram illustrating a configuration example of a monitoring system 300. FIG. 3 is a block diagram illustrating a detailed configuration example of a monitoring control unit 31. FIG. 3 is a block diagram illustrating a detailed configuration example of a configuration information management unit 32. FIG. 3 is a block diagram illustrating a detailed configuration example of a traffic collection unit 33. FIG. 3 is a block diagram illustrating a detailed configuration example of a calculation unit 34. FIG. 4 is a block diagram illustrating a detailed configuration example of a calendar function unit 36. FIG. 6 is a diagram illustrating an example of an operation sequence of the monitoring system 300. FIG. 10 is a flowchart illustrating an example of a processing procedure of estimated influence user number calculation processing in the monitoring system 300. 10 is a flowchart illustrating an example of a processing procedure of an estimated influence user number acquisition process in the monitoring system. It is a figure which shows an example of the acquisition conditions of the estimated influence user number in the calendar function part. It is a figure which shows the structural example of the communication network 100 which concerns on 2nd Embodiment. It is a figure which shows an example of the corresponding terminal ratio with respect to the carrier frequencies AB of the cell of calculation object. It is a figure which shows an example of the corresponding | compatible terminal ratio with respect to the carrier frequencies C-D of the cell of calculation object. It is a figure which shows the structural example of a LTE network. It is a figure which shows the structural example of NGN.

(First embodiment)
A first embodiment of the present invention will be described below with reference to the drawings.
(1) Configuration (1-1) Configuration Example of Communication Network System 1 Hereinafter, a first embodiment of a network monitoring device, a network monitoring program, and a network monitoring method according to the present invention will be described based on the drawings. 1 to 13 are diagrams showing a first embodiment of a network monitoring apparatus, a network monitoring program, and a network monitoring method according to the present invention.

First, based on FIG. 1, the structure of the communication network system 1 which concerns on this invention is demonstrated. FIG. 1 is a block diagram showing a schematic configuration of the communication network system 1.
As shown in FIG. 1, the communication network system 1 includes a communication network 100 to be monitored, a maintenance network 200, a monitoring system 300 that monitors the communication network 100, and a plurality of user communication terminals 400. The

The communication network 100 includes a plurality of network components having various functions for providing a predetermined communication service to a communication terminal 400 (user communication terminal 400) used by a registered user (subscriber). The
Here, the predetermined communication service is a data communication service using wired communication or wireless communication, and provides various information such as a voice communication service for a mobile phone or a fixed phone, an e-mail service, and a moving image. Services, network games, etc.

  In this embodiment, the communication network 100 has a configuration in which a plurality of network components (hereinafter abbreviated as NW components) are connected in a hierarchical manner. Note that a hierarchical connection is a configuration in which data can be transferred through each network component in order from a lower layer network component to an upper layer network component (or vice versa). Any connection form may be used. The transferred data may be simply relayed or processed (used for various conversions, arithmetic processing, etc.) depending on the function of each network component.

  Here, the plurality of NW components include a registered user management device that is a device that manages registered user information (subscriber information) for each domain, which is a management range on the network in the communication network 100. The registered user management device corresponds to, for example, a device that manages subscriber information (for example, VLR (Visitor Location Register), HLR (Home Location Register)) if the communication network 100 is a mobile communication network. Further, for example, if the communication network 100 is a network using the Internet network, a device for managing charging information of registered users in the charging system is applicable.

Here, the information indicating the number of registered users (hereinafter referred to as registered user number information) is information that can be obtained from the number of registered users corresponding to the domain or information that can calculate the number of registered users corresponding to the domain. The registered user number information is information including, for example, information that can identify at least a registered user among registered users and user communication terminals corresponding to each domain.
Further, the plurality of NW components include a lowermost NW component connected to the user communication terminal 400. Here, if the communication network 100 is a network using the Internet network or a fixed communication network, the NW component at the lowest layer corresponds to an intelligent HUB, a switch, a router, a gateway, and the like. Further, for example, if the communication network 100 is a mobile communication network, a cell or the like is applicable.

Further, the plurality of NW components include a traffic information collection device that collects information related to traffic of the preset NW components.
Here, the traffic information collection device uses, for example, traffic management technology such as SNMP (Simple Network Management Protocol), RMON (Remote Network Monitoring), NetFlow (registered trademark), sFlow (registered trademark), etc. Applicable to devices that collect information related to Further, the traffic information collection device corresponds to, for example, a terminal corresponding to the above various traffic management techniques such as an SNMP compatible terminal, an RMON compatible terminal, a NetFlow compatible terminal, an sFlow compatible terminal, and the like.

  In the present embodiment, information relating to traffic (hereinafter referred to as traffic information) includes, for example, information indicating a connection state (for example, a state of outgoing / incoming call) between the user communication terminal 400 and the NW component, a user This includes communication traffic such as the amount of data communication between the communication terminal 400 and the NW component, communication traffic between the NW component and the NW component, and the like.

  The traffic information may be information that can quantitatively compare the communication traffic between the NW components, and may not be the communication traffic itself. In this case, the traffic information may be, for example, the CPU usage rate of the NW component, the number of application transactions executed by the NW component, or the like. In other words, devices using the above-described traffic management technology do not necessarily exist as network components of the communication network 100. In such a case, replacement with information on the CPU usage rate or the number of application transactions is performed. Is possible.

  In addition, the plurality of NW components are various types for providing a predetermined communication service as an NW component (middle layer NW component) that is lower than the lowest layer NW component of the registered user management apparatus. There may be a case where a device having a function, a device for controlling data communication processing performed through the lowest layer NW component, and the like are included. For example, when the communication network 100 is a mobile communication network of a mobile phone, the NW component of the intermediate layer includes a mobile switching center (MSC), a radio network controller (RNC), a radio base A station (BTS: Base Transmission Station), a radio area (described later) generated by the BTS, and the like are applicable. In some cases, any of the NW components of the intermediate layer also has a function of a traffic information collection device that collects traffic information of the NW components using the various traffic management techniques described above.

The maintenance network 200 is a dedicated network for the monitoring system 300 to monitor the communication network 100.
The maintenance network 200 includes, for example, a LAN (Local Area Network), a dedicated line, a VPN (Virtual Private Network) via the Internet, and the like.
The monitoring system 300 is a system to which the network monitoring apparatus, the network monitoring program, and the network monitoring method according to the present invention are applied.

  The monitoring system 300 corresponds to each monitoring target NW component among the plurality of NW components configuring the communication network 100, with respect to an NW component preset as a monitoring target (hereinafter referred to as a monitoring target NW component). The number of accommodated users, which is the number of users to use, is estimated. Furthermore, the monitoring system 300 is based on the estimated number of accommodated users (estimated accommodated users) and information on the detour route, and the number of registered users estimated to be affected when a failure occurs in the monitoring target NW component. The number of estimated influential users is calculated.

Here, being influenced means, for example, a state in which the user communication terminal cannot receive a service provided by the communication network 100 or a state in which the service cannot be normally received.
The monitoring system 300 repeatedly calculates the estimated number of accommodated users and the estimated number of influential users for all monitored NW components at a preset time period. Then, the calculated estimated number of accommodated users and estimated estimated number of users are stored in the database in association with the traffic information acquisition time information (year / month / day / day of the week / time information) used for the calculation.
Furthermore, when a failure occurs in any of the monitoring target NW components, the monitoring system 300 matches an acquisition condition set in advance with respect to the time when the failure occurs among the estimated number of affected users accumulated in the database. The estimated number of affected users having time information to be acquired is acquired, and the acquired estimated number of affected users is displayed together with the content of the failure.

(1-2) Configuration Example of Communication Network 100 Next, a configuration example of the communication network 100 of the present embodiment will be described based on FIG. FIG. 2 is a diagram illustrating a configuration example of the communication network 100 of the present embodiment.
In the present embodiment, as shown in FIG. 2, the communication network 100 includes an NW component 110 that is the highest-order NW component, and NW components 111-1 and 111-2 that are connected to the NW component 110. Consists of including. Furthermore, the communication network 100 includes NW components 112-1 and 112-2 connected to the NW component 111-1, and NW components 112-3 and 112-4 connected to the NW component 111-2. Consists of. Furthermore, the communication network 100 includes a lowermost NW component 113-1 connected to the NW component 112-1 and a lowermost NW component 113-2 connected to the NW component 112-2. Consists of. Further, the communication network 100 includes a lowermost NW component 113-3 connected to the NW component 112-3 and an NW component 113-4 connected to the NW component 112-4. The

Further, a configuration in which user communication terminals 400-11 to 400-1n ₁ (n ₁ is a natural number of 1 <i <j <k <l <n ₁ ) can be connected to the NW components 113-1 to 113-3. It has become. Further, the user communication terminals 400-21 to 400-2n ₂ (n ₂ is a natural number of 1 <n ₂ ) can be connected to the NW component 113-4.
And NW components 113-1～113-4, user communication terminal 400-11~400-1n _1, 400-21~400-2n ₂ (hereinafter, abbreviated as 400-11~400-2n ₂₎ and the connection form May be wired or wireless. In addition, the user communication terminals 400-11 to 400-2n include a desktop PC having a communication function and a fixed communication terminal such as a fixed telephone, a mobile communication terminal having a wireless communication function such as a mobile phone, and the like.

Further, the communication network 100 is configured to include an NW component 130-1 and an NW component 130-2 as a traffic information collection device.
The NW component 130-1 is a terminal (probe) corresponding to RMON, and is a device that collects traffic information of the NW components 113-1 to 113-2. The NW component 130-2 is a terminal (probe) corresponding to RMON, and is a device that collects traffic information of the NW components 113-1 to 113-2.

  Note that the communication network 100 according to the present embodiment includes a NW component 130-1 and an NW component 130-2, which are dedicated devices (probes) that collect traffic information, as traffic information collection devices. However, it is not limited to this configuration. In addition to the NW components 130-1 to 130-2 (probes) or instead of the NW components 130-1 to 130-2 (probes), other NW components can add traffic information in addition to the original functions. It is good also as a structure which combines the function (The case where the traffic information collected by other apparatuses is simply received) is also combined.

Here, FIG. 3 is a diagram showing a specific configuration example of the communication network 100 when the NW component has a function of collecting traffic information in addition to the original function.
For example, like the communication network 100 shown in FIG. 3, in the communication network 100 of FIG. In addition to the functions related to the communication service, a function of collecting traffic information (traffic collecting function) is provided. And it is good also as a structure which collects the traffic information of NW component 113-1 to 113-4 by NW component 112-1 to 112-4 (with traffic collection function).
It should be noted that not only the NW components 112-1 to 112-4 but also other upper NW components may have a traffic collection function.

  Returning to FIG. 2, the communication network 100 further includes detour routes 120-1 to 120-4. Specifically, when the NW component 112-1 fails, the NW component 113-1 can bypass the NW component 112-1 using the bypass route 120-1. Further, the NW component 113-2 can bypass the NW component 112-2 using the bypass route 120-2. Further, the NW component 113-3 can bypass the NW component 112-3 using the bypass route 12--3. Further, the NW component 113-4 can bypass the NW component 112-4 using the bypass route 120-4.

As shown in FIG. 2, the communication network 100 includes a domain 150-1 including user communication terminals 400-11 to 400-1n ₁ in a management range and user communication terminals 400-21 to 400-2n _{2 as} domains. Is included in advance in the management range.
In the example shown in FIG. 2, for convenience of explanation, each NW component, detour route, and domain have the number and connection configuration shown in the figure. It can vary depending on the application.

In the example illustrated in FIG. 2, the NW component 110 corresponds to a registered user management apparatus (hereinafter referred to as a registered user management apparatus 110) that manages registered user information of the domains 150-1 to 150-2.
The communication network 100 is a mobile communication network, when the user communication terminal 400-11～400-1N ₁ is a mobile communication terminal such as a cellular phone, since the movement of the registered user occurs frequently, each domain The corresponding number of registered users changes dynamically.

  Further, when the communication network 100 is a communication network system in which the connection state of the user terminal is a static state like a conventional fixed telephone network, a situation in which addition or deletion of a network part is frequently performed, that is, In a situation where the network configuration (topology) is frequently changed, the connection state of the user terminal changes (the number of registered users corresponding to each domain changes dynamically).

(1-3) Configuration Example of Monitoring System 300 Next, a configuration example of the monitoring system 300 will be described based on FIG. FIG. 4 is a block diagram illustrating a configuration example of the monitoring system 300.
As shown in FIG. 4, the monitoring system 300 includes a monitoring control unit 31, a configuration information management unit 32, a traffic collection unit 33, a calculation unit 34, and an affected user number database (hereinafter, the database is abbreviated as DB) 35. And a calendar function unit 36.
Further, a monitoring terminal 500 is connected to the monitoring control unit 31, and an editing terminal 550 is connected to the traffic collection unit 33 and the calculation unit 34.

  The monitoring control unit 31 has a function corresponding to a known EMS (Element Management System) or NMS (Network Management System), and has a function of monitoring each NW component constituting the communication network 100. Specifically, the monitoring control unit 31 collects monitoring information including information on monitoring items set in advance from each NW component constituting the communication network 100, and based on the collected monitoring information, the communication network 100 Each NW component that constitutes is monitored. The monitoring control unit 31 has a function of storing and holding collected monitoring information.

Here, the monitoring items include the number of registered users corresponding to each domain, traffic information of each NW component, configuration information of each NW component (for example, address information such as an IP address), performance information of each NW component, Includes failure notification information.
The configuration information management unit 32 acquires configuration information of each NW component from the monitoring information collected by the monitoring control unit 31 from the monitoring control unit 31. And it has the function to define the static connection structure of the communication network 100 based on the acquired structure information. Furthermore, the configuration information management unit 32 has a function of storing and holding information indicating the defined static connection configuration (hereinafter referred to as NW configuration information).

In the present embodiment, the traffic collection unit 33 collects information according to preset acquisition items from the traffic information collection devices (NW components 130-1 to 130-2) via the monitoring control unit 31. It has a function to do. The traffic collection unit 33 has a function of storing and holding collected information.
Hereinafter, the NW components 130-1 to 130-2 are referred to as traffic information collection devices 130-1 to 130-2.

Here, the acquisition items include information on the number of registered users in the domain to which each monitoring target NW component belongs, and traffic information for each monitoring target NW component. Hereinafter, the information including the number of registered users in each domain and the traffic information for each monitoring target NW component is referred to as calculation information.
Note that the traffic collection unit 33 may directly collect various information from the registered user management apparatus 110 and the traffic information collection apparatuses 130-1 to 130-2 without going through the monitoring control unit 31.

  The calculation unit 34 acquires NW configuration information from the configuration information management unit 32, and acquires traffic information corresponding to each monitoring target NW component from the traffic collection unit 33 based on the acquired NW configuration information. Further, the computing unit 34 calculates the estimated number of accommodated users and the estimated number of affected users based on the acquired traffic information. The calculation unit 34 stores the calculated estimated number of users and estimated number of influential users in the estimated influential user number DB 35 in association with the information of the acquisition time of the calculation information used for these calculations.

The estimated influence user number DB 35 associates the estimated accommodation user number and the estimated influence user number of each monitoring target NW component calculated by the calculation unit 34 with the information on the acquisition time of the calculation information used for the calculation. It is a database that stores information.
In response to the alarm signal from the monitoring control unit 31, the calendar function unit 36, based on the failure occurrence time information of the monitoring target NW component in which the failure has occurred, and the preset acquisition condition, from the estimated influence user number DB 35 Then, the estimated number of affected users corresponding to the monitored NW component in which the failure has occurred is acquired. The calendar function unit 36 causes the monitoring terminal 500 to display the acquired estimated influence user number and the failure content via the monitoring control unit 31.

  The monitoring terminal 500 transmits / receives data to / from the monitoring control unit 31 according to the operation of the operator. For example, the monitoring terminal 500 is for monitoring NW components designated by the operator among the NW components monitored by the monitoring control unit 31. Get information. And it has a function to display the acquired monitoring information. Furthermore, when a failure occurs in the monitoring target NW component, the monitoring terminal 500 receives information indicating the content of the failure from the calendar function unit 36 and an estimation value that is an estimated value of the number of affected users affected by the failure. Get information about the number of affected users. And it has the function to display the information which shows the content of the acquired failure, and the information of an estimated influence user number.

  The editing terminal 550 has a function of transmitting / receiving data to / from the traffic collection unit 33 in accordance with an operator's operation and editing information acquisition items collected by the traffic collection unit 33. Further, the editing terminal 550 transmits / receives data to / from the calculation unit 34 according to the operation of the operator, and the contents (parameters) of the calculation formula used by the calculation unit 34 for calculating the estimated number of accommodated users and the estimated number of affected users. Has a function to edit.

Although not shown in the drawings, each of the above-described components, the monitoring terminal 500, and the editing terminal 550 are all software that controls the hardware necessary to realize each function and realize each function using software. A computer system is provided for execution.
Such a computer system includes a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), an input / output interface (I / F), and a bus. The CPU, RAM, ROM, and input / output I / F are connected to a bus, and data can be transmitted and received between these connected devices via the bus.
Although not shown, the monitoring terminal 500 and the editing terminal 550 include a storage device, a display device, an input device, and a communication device connected via an input / output I / F.
Note that it is not necessary for all the above-described components to include a computer system, and a configuration in which several components coexist in one apparatus may be employed.

(1-3-1) Detailed Configuration Example of the Monitoring Control Unit 31 Next, a detailed configuration example of the monitoring control unit 31 will be described based on FIG. FIG. 5 is a block diagram illustrating a detailed configuration example of the monitoring control unit 31.
As shown in FIG. 5, the monitoring control unit 31 includes a data communication unit 31a, a monitoring information acquisition unit 31b, a monitoring information DB 31c, a data processing unit 31d, and an alarm management unit 31e. .
The data communication unit 31a includes a communication device for communicating with an external device on a network such as a LAN, a WAN, and the Internet, and performs data communication with each NW component configuring the communication network 100 via the communication device. .

The monitoring information acquisition unit 31b acquires monitoring information from each NW component via the data communication unit 31a. Then, the acquired monitoring information is stored in the monitoring information DB 31c.
The monitoring information DB 31c is a database for storing the monitoring information acquired by the monitoring information acquisition unit 31b.
In response to the traffic information acquisition request from the traffic collection unit 33, the data processing unit 31d transmits the acquisition request information to the requested NW component via the data communication unit 31a. Further, in response to a display request from the calendar function unit 36, the data processing unit 31d performs processing for causing the monitoring terminal 500 to display the content of the failure and the estimated number of users affected by the failure.

The alarm management unit 31e generates alarm information based on the failure notification information received from the NW component via the data communication unit 31a. Here, the failure notification information includes identification information of the NW component and information (for example, an error code) indicating the content of the failure.
Specifically, the alarm management unit 31e generates alarm information including the content of the failure, identification information of the NW component in which the failure has occurred, and information on the time of occurrence of the failure. The alarm management unit 31e transmits the generated alarm information to the calendar function unit 36.

(1-3-2) Detailed Configuration Example of Configuration Information Management Unit 32 Next, a detailed configuration example of the configuration information management unit 32 will be described with reference to FIG. FIG. 6 is a block diagram illustrating a detailed configuration example of the configuration information management unit 32.
The configuration information management unit 32 includes a configuration information acquisition unit 32a, an NW configuration information definition unit 32b, and an NW configuration information DB 32c.
The configuration information acquisition unit 32 a acquires configuration information of each NW component configuring the communication network 100 from the monitoring control unit 31. The configuration information acquisition unit 32a outputs the acquired configuration information to the NW configuration information definition unit 32b.

The NW configuration information definition unit 32b generates NW configuration information that defines the static configuration of the communication network 100 based on the configuration information of each NW configuration element acquired from the configuration information acquisition unit 32a. The NW configuration information definition unit 32b stores the generated NW configuration information in the NW configuration information DB 32c.
Here, the NW configuration information includes information indicating a connection configuration of each NW component, information indicating a detour route, and the like.
The NW configuration information DB 32c is a database for storing the NW configuration information generated by the NW configuration information definition unit 32b. The NW configuration information DB 32c outputs the NW configuration information to each requesting component in response to an acquisition request from the traffic collection unit 33 and the calculation unit 34.

(1-3-3) Detailed Configuration Example of the Traffic Collection Unit 33 Next, a detailed configuration example of the traffic collection unit 33 will be described based on FIG. FIG. 7 is a block diagram illustrating a detailed configuration example of the traffic collection unit 33.
As shown in FIG. 7, the traffic collection unit 33 includes a calculation information acquisition unit 33a, a calculation information processing unit 33b, and a calculation information DB 33c.

The calculation information acquisition unit 33a acquires traffic information from the traffic information collection devices 130-1 to 130-2, which are traffic information collection devices, via the monitoring control unit 31 at a preset time period.
In the present embodiment, the traffic information collection devices 130-1 to 130-2 have traffic information between the lowest-layer NW component and the user communication terminal, the lowest-layer NW component, and the NW configuration that is one level higher than that. Collect traffic information between elements.

That is, in the case of the communication network 100 of the present embodiment, the traffic information collection device 130-1 is between the lowest-layer NW components 113-1 to 113-2 and the user communication terminals 400-11 to 400-1k. Get traffic information. Furthermore, the traffic information collection device 130-2 includes a bottom layer of NW elements 113-3, and traffic information between the user communication terminal 400-1L～400-1n _1, the lowest layer of NW elements 113-4 And traffic information between the user communication terminals 400-21 to 400-2n ₂ are collected. Further, the traffic information collection device 130-1 includes the traffic information between the lowest layer NW component 113-1 and the NW component 112-1, and the lowest layer NW component 113-2 and the NW component 112-. And traffic information between the two. Further, the traffic information collection device 130-2 includes the traffic information between the lowest layer NW component 113-3 and the NW component 112-3, and the lowest layer NW component 113-4 and the NW component 112-. 4 and traffic information is collected. Therefore, the calculation information acquisition unit 33a acquires the collected information from the traffic information collection devices 130-1 to 130-2.

  Furthermore, the calculation information acquisition unit 33a receives the registered user number information (here, the number of registered users) corresponding to each domain from the registered user management device 110 via the monitoring control unit 31 at a preset time period. Information to understand). The calculation information acquisition unit 33a stores information (calculation information) including the acquired registered user number information and traffic information in the calculation information DB 33c.

Here, in the case of the communication network 100 according to the present embodiment, two domains of the domain 150-1 and the domain 150-2 are set. Therefore, the calculation information acquisition unit 33a includes the registered user number information corresponding to the user communication terminals 400-11 to 400-1n ₁ belonging to the domain 150-1 and the user communication terminals 400-21 to 400 belonging to the domain 150-2. -2n ₂ corresponding to the registered user number information is acquired.

The calculation information processing unit 33b aggregates the traffic information among the calculation information acquired by the calculation information acquisition unit 33a every preset unit time. For the number of registered users corresponding to each domain, an average value for each preset unit time is calculated. The calculation information processing unit 33b stores each calculation result of the calculation information in the calculation information DB 33c.
The calculation information DB 33c is a database that stores the calculation results of the traffic information and the registered user number information of the calculation information processing unit 33b.

(1-3-4) Detailed Configuration Example of Calculation Unit 34 Next, a detailed configuration example of the calculation unit 34 will be described with reference to FIG. FIG. 8 is a block diagram illustrating a detailed configuration example of the calculation unit 34.
As shown in FIG. 8, the calculation unit 34 includes a parameter editing unit 34 a, an arithmetic expression information DB 34 b, an estimated accommodated user number calculation unit 34 c, and an estimated influence user number calculation unit 34 d.

In response to an instruction from the editing terminal 550, the parameter editing unit 34a edits the parameters of the arithmetic expression for calculating the estimated number of accommodated users and the estimated number of influential users stored in the arithmetic expression information DB 34b.
The arithmetic expression information DB 34b stores information on an arithmetic expression for calculating the estimated number of accommodated users and information on an arithmetic expression for calculating the estimated number of influential users. Further, the stored parameter of the arithmetic expression is updated based on the editing result of the parameter editing unit 34a.

  The estimated accommodated user number calculation unit 34 c acquires the NW configuration information from the configuration information management unit 32 in accordance with the collection timing of the calculation information of the traffic collection unit 33. Furthermore, the estimated accommodated user number calculation unit 34c acquires information for calculation corresponding to each monitoring target NW component from the traffic collection unit 33 based on the acquired NW configuration information. Specifically, the estimated accommodated user number calculating unit 34c acquires the registered user number information of the domain to which each monitoring target NW component belongs from the traffic collecting unit 33. Here, the monitoring target NW component is set in advance by the supervisor. In this embodiment, it is assumed that the NW components 111-1 to 111-2, 112-1 to 112-4, and 113-1 to 113-4 are set as the monitoring target NW components. Hereinafter, these monitoring target NW components are collectively referred to as monitoring target NW components 111-1 to 113-4.

  Further, the estimated accommodated user count calculation unit 34c receives traffic information (hereinafter referred to as monitoring unit traffic information) of all the lowest NW components under the respective monitoring target NW components from the traffic collection unit 33 (lower layer side). ). Further, the estimated accommodated user number calculation unit 34c receives traffic information (hereinafter referred to as domain unit traffic information) from the traffic collection unit 33 of all the lowest NW components belonging to the same domain as the domain to which each monitored NW component belongs. ).

  In this embodiment, the monitoring unit traffic information and the domain unit traffic information are composed of information on the sum of numerical values (hereinafter referred to as unit total traffic amount) indicated by the traffic information for each NW component at the lowest layer. . In the present embodiment, a serial number is assigned in advance to information indicating each unit total traffic amount constituting the monitoring unit traffic information. Similarly, a serial number is assigned in advance to information indicating each unit total traffic amount constituting the domain unit traffic information.

  Furthermore, the estimated accommodated user number calculating unit 34c reads out information on an arithmetic expression for calculating the estimated accommodated user number from the arithmetic expression information DB 34b. Then, based on the read arithmetic expression information, the acquired registered user number information, and the acquired monitoring unit traffic information and domain unit traffic information, the estimated accommodated user number of each monitoring target NW component is calculated. The estimated accommodated user number calculating unit 34c outputs the calculated estimated accommodated user number to the estimated affected user number calculating unit 34d together with information on the corresponding monitoring target NW component.

Here, the estimated number of accommodated users is the number of user communication terminals estimated to actually use the NW component to be monitored.
Specifically, the estimated number of accommodated users includes the number of registered users corresponding to the domain to which the monitoring target NW component belongs (hereinafter referred to as the number of domain registered users) in the monitoring unit traffic information corresponding to the monitoring target NW component. The total unit traffic amount is divided by the ratio between the total unit traffic amount and the total unit traffic amount included in the domain unit traffic information corresponding to the domain to which the monitored NW component belongs. In other words, the sum of the unit total traffic amount of all the lowermost NW components under the monitored NW component is the sum of all the lowest NW components belonging to the same domain as the monitored NW component. Divide by the sum of unit traffic. As a result, the ratio of the traffic amount of the monitoring target NW component unit to the traffic amount of the domain unit of the lowermost NW component is calculated. Further, by multiplying the ratio by the number of domain registered users, the estimated number of accommodated users corresponding to each monitoring target NW component is calculated. When this is expressed by an arithmetic expression, the following expression (2) is obtained.

  In the above equation (2), the estimated number of accommodated users (x, y) is the estimated number of accommodated users corresponding to the monitoring target NW component y belonging to the domain x. In the above equation (2), the number of registered users (x) is the number of registered users corresponding to the domain x. In the above equation (2), n (y) is the total number of the lowest-layer NW components under the monitoring target NW component y. Further, in the above equation (2), n (x, y) is the total number of the lowest layer NW components belonging to the domain x to which the monitoring target NW component y belongs. In the above equation (2), traffic a is information related to communication traffic between the lowest-layer NW component and the user communication terminal. The traffic a (i) corresponds to the unit total traffic amount of the lowest-layer NW component i under the monitoring target NW component. The traffic a (j) corresponds to the unit total traffic amount of the lowest-layer NW component j belonging to the same domain as the domain to which the monitoring target NW component belongs.

Here, i corresponds to a serial number assigned to information indicating each unit total traffic amount included in the monitoring unit traffic information. Further, j corresponds to a serial number assigned to information indicating each unit total traffic amount included in the domain unit traffic information.
Here, in the communication network 100 of the present embodiment, the domain x in the above equation (2) corresponds to the domain 150-1 or 150-2. That is, x is a domain identification number. Further, the monitoring target NW component y in the above equation (2) corresponds to the monitoring target NW components 111-1 to 113-4. That is, y is the identification number of the monitoring target NW component.

In addition, n (y) in the above formula (2) is, for example, if the monitoring target NW component y is the NW component 112-1, the lowest-layer NW component under the NW component 112-1 The total number of That is, since the NW component elements in the lowermost layer under the NW component element 112-1 are the NW component elements 113-1 and 113-2, “n (y) = 2”.
Further, n (x, y) in the above equation (2) is, for example, the total number of the lowest-layer NW components belonging to the domain 150-1 in the case of the domain 150-1. That is, since the lowest level NW components belonging to the domain 150-1 are the NW components 113-1 to 113-3, "n (x, y) = 3" is obtained.

  That is, for the user communication terminal that actually uses the communication service provided by the communication network 100, communication traffic always occurs between the lowest-layer NW components. Therefore, the sum of the unit total traffic amounts of all the lowest NW components under each monitored NW component is divided by the total unit traffic amount of all the lowest NW components belonging to the domain. Thus, it is possible to calculate the ratio of the communication traffic volume of the monitoring target NW component to the communication traffic volume of the entire domain. Then, by multiplying this ratio by the total number of registered users (domain registered users) corresponding to the domain, the number of user communication terminals (accommodating users) actually using the communication service in units of monitored NW components. It is possible to calculate an estimated value.

On the other hand, the estimated influence user number calculation unit 34 d acquires NW configuration information from the configuration information management unit 32. As the NW configuration information, the information acquired by the estimated accommodated user number calculation unit 34c may be used as it is.
The estimated influence user number calculation unit 34d extracts information on the communication route including the detour route of the NW component under the monitoring target NW component from the acquired NW configuration information. In the case of the communication network 100 according to the present embodiment, there are four bypass routes, that is, the bypass routes 120-1 to 120-4 with respect to the lowest-layer NW components 113-1 to 113-4 (FIG. 2). Route indicated by dotted line inside).

  Further, the estimated influence user number calculation unit 34d acquires traffic information when the NW component under the monitoring target NW component uses a communication route including a bypass route from the traffic collection unit 33. In the communication network 100 according to the present embodiment, when the detour routes 120-1 to 120-4 are used, the lowest-layer NW components 113-1 to 113-4 to the NW components 112-1 to 112-4 are used. Information related to traffic (data transfer amount) is acquired. Furthermore, information on traffic when the route indicated by the solid line in FIG. 2 from the lowest-layer NW components 113-1 to 113-4 to the NW components 112-1 to 112-4 is used is acquired. Hereinafter, the traffic information when the NW component under the monitoring target NW component uses the communication route including the detour route is referred to as route use traffic information.

Further, the estimated influence user number calculation unit 34d reads out information on an arithmetic expression for calculating the estimated influence user number from the arithmetic expression information DB 34b. Specifically, the estimated influence user number calculation unit 34d reads an arithmetic expression for calculating the estimated influence user number and an arithmetic expression for calculating an area coefficient used for calculating the estimated influence user number.
First, the estimated influence user number calculation unit 34d calculates the area coefficient of the monitoring target NW component to be calculated based on the read area coefficient calculation formula information and the acquired route use traffic information.

Here, the area coefficient subtracts the number of registered users (number of user communication terminals) that can be avoided by using the detour route from the estimated number of accommodated users when a failure such as a failure occurs in the monitored NW component. It is a coefficient to do. The estimated number of users affected is calculated by multiplying the estimated number of accommodated users by the area coefficient.
Note that the formula for calculating the estimated number of users is given by the following formula (3), and the formula for calculating the area coefficient is given by the following formula (4).
Estimated influence user number (x, y) = area coefficient (x, y) × estimated accommodated user number (x, y)
... (3)
Area coefficient (x, y) = (1-dr (x, y)) ^{d (x, y) −1} (4)

  In the above equation (4), dr (x, y) is the other route usage ratio (x, y) corresponding to the monitoring target NW component y belonging to the domain x. The other route usage ratio (x, y) is the amount of communication traffic when using each communication route for all communication routes including the detour route that can be used by the lowermost NW component under the monitoring target NW component y. The sum of numerical values related to the amount of communication traffic when using a communication route in which the communication destination is another NW component other than the monitored NW component y other than the monitored NW component y with respect to the sum of the numerical values related to (data transfer amount) It becomes the ratio.

  Here, the detour route includes a route that is used only when a failure occurs in the NW component, and a route that is normally used to distribute processing, improve processing efficiency, and the like. In the latter case, the route may be used regardless of whether or not a failure has occurred (without distinction between the normal route and the detour route), and the ratio used for each route is also different. In addition, when using the detour route, the detour destination NW component may be an NW component under the same NW component. When communication data using a bypass route finally passes through the same NW component, if a failure occurs in this NW component, the failure cannot be avoided even if this bypass route is used. That is, a failure can be avoided only when a detour route (another route) that reaches another NW component in the same layer (functionally equivalent) as the component other than the same NW component is used. From this, in the present embodiment, the other route utilization ratio (x, y) is calculated.

  D (x, y) is the number of communication routes (x, y) corresponding to the monitoring target NW component y belonging to the domain x. In the communication network 100 of the present embodiment, the communication route number (x, y) is calculated from the information on the communication route statically defined in the NW configuration information because the communication route does not change dynamically. It is possible. For example, when the monitoring target NW component y is the NW component 111-1, the number of communication routes of the lowermost NW components 113-1 to 113-2 underneath is the NW component 113- in FIG. There are four communication routes including two routes indicated by solid lines extending from 1-113-2 to 112-1 to 112-2 and detour routes 120-1 and 120-2. Therefore, “the number of communication routes (111-1) = 4”.

When the communication network 100 is, for example, a mobile communication network of a mobile phone, the communication route may change dynamically in the wireless communication section. Therefore, it is necessary to calculate from the traffic how many communication routes can be created.
The area coefficient is obtained by multiplying (1-other route use ratio (x, y)) by (communication route number (x, y) -1) as shown in the above equation (4). That is, the greater the number of communication routes that can bypass the NW component 111-1, the greater the number of registered users who are not affected by the failure, so the area coefficient becomes a smaller value of less than 1.

As shown in the above equation (3), the estimated influence user number calculation unit 34d multiplies the estimated area user (x, y) by the calculated area coefficient (x, y), thereby estimating the estimated influence user number (x, y). x, y) is calculated.
Here, when there is no detour route that can avoid the monitored NW component in which the failure has occurred, the area coefficient is 1. Therefore, for the relevant monitoring target NW component, the estimated number of accommodated users (x, y) becomes the estimated number of affected users (x, y) as it is.
The estimated influence user number calculating unit 34d uses the calculated estimated influence user number (x, y) and the estimated accommodated user number (x, y) calculated by the estimated accommodated user number calculation unit 34c to calculate various traffic. The information is stored in the estimated influence user number DB 35 in association with the time information at the time of acquisition.

  Specifically, the estimated influence user number calculating unit 34d acquires information on the acquisition time from the traffic information used for calculating the estimated accommodated user number (x, y) and the estimated influence user number (x, y). In this embodiment, time information at the time of acquisition is added to each traffic information, and the estimated influence user number calculation unit 34d acquires the time information added to each traffic information. Further, in the present embodiment, since traffic information of a preset unit time is used, for example, the time information of the earliest time, the time information of the latest time in the set unit time, or Both pieces of time information are acquired. In this embodiment, both the earliest time information and the latest time information are acquired and handled as time zone information (hereinafter referred to as time zone information). Therefore, the estimated number of accommodated users (x, y) and the estimated number of affected users (x, y) correspond to the time zone information (hereinafter referred to as first time information) acquired from the traffic information used at the time of calculation. In addition, it is stored in the estimated influence user count DB 35. In addition, it is good also as a structure which acquires not only the earliest time and the latest time but intermediate | middle time information, and matches and memorize | stores it with intermediate | middle time information.

(1-3-5) Detailed Configuration Example of Calendar Function Unit 36 Next, a detailed configuration example of the calendar function unit 36 will be described based on FIG. FIG. 9 is a block diagram illustrating a detailed configuration example of the calendar function unit 36.
As shown in FIG. 9, the calendar function unit 36 includes an estimated influence user number acquisition unit 36a.
The estimated influence user number acquisition unit 36a, from the alarm information acquired from the monitoring control unit 31, information indicating the content of the failure, identification information of the NW component in which the failure occurred, and information on the occurrence time of the failure (hereinafter referred to as the first) 2 time information). Based on the extracted information, the estimated influential user number corresponding to the first time information that meets the preset acquisition condition is calculated from the estimated influential user number DB 35 with respect to the failure occurrence time (second time information). get.
In the present embodiment, the first time information and the second time information include year / month / day / day of the week / time information.

  In the present embodiment, when the estimated time-of-user acquisition unit 36a determines that the day indicated by the second time information is a weekday or Sunday, the same day of the week and second time information as the second time information of the most recent weekday or Sunday in the past. It is determined that the estimated number of influential users corresponding to the first time information in the time zone closest to the time indicated by is matched with the acquisition condition. Then, the estimated influence user number that matches the acquisition condition is acquired from the estimated influence user number DB 35.

In the present embodiment, weekdays correspond to Mondays to Saturdays other than holidays.
Further, when the estimated influence user number acquisition unit 36a determines that the day indicated by the second time information is a holiday, the estimated time-of-user count acquisition unit 36a sets the first time information in the time zone closest to the time indicated by the second time information on the most recent holiday in the past. It is determined that the corresponding estimated influence user number matches the acquisition condition. Then, the estimated number of influential users determined to match the acquisition condition is acquired from the estimated influential user number DB 35.

  In the present embodiment, the public holidays are national holidays. Further, in this embodiment, a holiday is a day that a public institution has decided to rest on the basis of the execution of duties and operations, and includes Sundays, public holidays, New Year holidays, and Bon holidays. In the present embodiment, the calendar function unit 36 can freely set calendar information on holidays (how many months and what days are taken off).

The estimated influence user number acquisition unit 36a outputs the acquired information on the estimated influence user number and alarm information corresponding to the estimated influence user number to the monitoring terminal 500.
Thereby, in the monitoring terminal 500, information indicating the content of the failure and information indicating the estimated number of affected users are displayed.
Note that the number of estimated affected users acquired by the calendar function unit 36 is frequently changed according to the usage of the communication network system and the characteristics of the traffic used for calculating the estimated number of affected users. Therefore, it is desirable that the arithmetic expression (calculation logic) of the estimated number of affected users to be acquired can be freely changed. In the present embodiment, the calculation logic can be changed via the editing terminal 550.

(2) Operation Example of Monitoring System 300 Next, an operation example of the monitoring system 300 according to the present embodiment will be described with reference to FIGS.
FIG. 10 is a diagram illustrating an example of an operation sequence of the monitoring system 300. FIG. 11 is a flowchart illustrating an example of a processing procedure of an estimated influence user number calculation process in the monitoring system 300. FIG. 12 is a flowchart illustrating an example of a processing procedure of an estimated influence user number acquisition process in the monitoring system 300. FIG. 13 is a diagram illustrating an example of an acquisition condition of the estimated influence user count in the calendar function unit 36.

  As shown in FIG. 10, NW configuration information is registered in the configuration information management unit 32 (step S10). Specifically, the configuration information management unit 32 acquires configuration information of each NW component configuring the communication network 100 from the monitoring control unit 31 in the configuration information acquisition unit 32a, and the acquired configuration information is defined as NW configuration information definition. To the unit 32b. The NW configuration information definition unit 32b generates NW configuration information that defines the static configuration of the communication network 100 based on the configuration information of each NW configuration element acquired from the configuration information acquisition unit 32a. Then, the NW configuration information definition unit 32b stores the generated NW configuration information in the NW configuration information DB 32c. The NW configuration information includes a connection configuration of each NW component, information on a detour route, and the like.

On the other hand, in the registered user management apparatus 110 constituting the communication network 100, the number of registered users is totaled according to a timer trigger that occurs at a preset timing. In addition, in the traffic information collection devices 130-1 and 130-2 constituting the communication network 100, the collected traffic information is totaled according to the occurrence of a timer trigger whose trigger timing is set in advance (step S12).
Further, the traffic collection unit 33 acquires NW configuration information from the configuration information management unit 32 (step S14). When acquiring the NW configuration information, the traffic collection unit 33 acquires calculation information from the registered user management device 110 and the traffic information collection devices 130-1 to 130-2 based on the acquired NW configuration information.

  Specifically, the traffic collection unit 33 receives the monitoring unit traffic from the traffic information collection devices 130-1 to 130-2 through the monitoring control unit 31 at a preset time period in the calculation information acquisition unit 33 a. Information, domain unit traffic information, and route use traffic information are acquired. Further, the calculation information acquisition unit 33a acquires the number of registered users corresponding to the domains 150-1 to 150-2 from the registered user management device 110 via the monitoring control unit 31 at a preset time period. To do. The calculation information acquisition unit 33a stores the calculation information including the acquired number of registered users information, monitoring unit traffic information, domain unit traffic information, and route use traffic information in the calculation information DB 33c.

  Next, the traffic collection unit 33 performs a totaling process for the obtained calculation information (step S17). Specifically, in the calculation information processing unit 33b, the traffic collection unit 33 aggregates the traffic information among the calculation information acquired by the calculation information acquisition unit 33a for each preset unit time. For example, when it is set in units of one hour, for example, when there is a plurality of the same type of traffic information acquired for the same NW component between 13:00 and 14:00, 13 for each NW component : Sum of a plurality of traffic information of the same kind for one hour from 00 to 14:00. Further, the arithmetic information processing unit 33b calculates an average value for each preset unit time for the registered user number information corresponding to the domains 150-1 and 150-2. For example, when it is set in units of one hour, for example, when there are a plurality of registered user number information acquired for the same domain between 13: 00 and 14:00, 13: 00 to 14:00 The average value of the number of registered users for one hour is calculated. The calculation information processing unit 33b stores each calculation result of the calculation information in the calculation information DB 33c.

Next, the calculation unit 34 acquires NW configuration information from the configuration information management unit 32 at a preset time period (step S18).
Specifically, the calculation unit 34 acquires NW configuration information from the configuration information management unit 32 in the estimated accommodated user number calculation unit 34c. Further, the estimated influence user number calculation unit 34d acquires the NW configuration information from the estimated accommodated user number calculation unit 34c.

Next, the calculation unit 34 obtains calculation information necessary for calculating the estimated number of affected users (step S20).
Specifically, the calculation unit 34 is necessary for calculating the estimated number of accommodated users for each monitoring target NW component from the traffic collection unit 33 based on the NW configuration information acquired in step S18 in the estimated accommodated user number calculating unit 34c. Get information for correct operation. In addition, in the estimated influence user number calculation unit 34d, the calculation unit 34 acquires calculation information necessary for calculating the estimated influence user number of each monitoring target NW component based on the NW configuration information acquired in step S18.

Next, the calculation unit 34 performs a process for calculating the estimated number of affected users (step S22).
When the estimated influence user number calculation process is started, as shown in FIG. 11, the estimated accommodation user number calculation unit 34c determines whether or not calculation information necessary for calculating the estimated influence user number is acquired ( Step S100). If it is determined that it has not been acquired (No in step S100), the determination process is repeated until it is acquired.

On the other hand, if it is determined that the calculation information has been acquired (Yes in step S100), then, in the estimated accommodation user number calculation unit 34c, the calculation expression necessary for calculating the estimated accommodation user number is calculated from the calculation expression information DB 34b. Information is acquired (step S102).
Specifically, the estimated accommodated user number calculation unit 34c acquires information on the arithmetic expression shown in the above expression (2) from the arithmetic expression information DB 34b.

Next, the estimated accommodated user count calculation unit 34c calculates the estimated accommodated user count for each monitoring target NW component based on the acquired calculation information and calculation formula information (step S104).
For example, it is assumed that the monitoring target NW component is the NW component 111-1. In this case, the estimated accommodated user number calculation unit 34c first monitors the monitoring unit traffic information of the NW components 113-1 to 113-2 in the lowermost layer under the NW component 111-1 among the obtained calculation information. Based on the above, a total sum of unit traffic included in the monitoring unit traffic information is calculated. Thereby, the total traffic amount (hereinafter referred to as the first total traffic amount) with the user communication terminals 400-11 to 400-1k in units of NW components 111-1 per unit time set in advance is calculated.

  Next, the estimated accommodated user number calculating unit 34c performs domain unit traffic based on the domain unit traffic information of the lowest layer NW components 113-1 to 113-3 belonging to the domain 150-1 to which the NW component 111-1 belongs. The total sum of the unit traffic included in the information is calculated. Thereby, the total traffic volume (hereinafter referred to as the second total traffic volume) with the user communication terminals 400-11 to 400-1n in the domain 150-1 unit per unit time set in advance is calculated.

The estimated accommodated user number calculation unit 34c divides the first total traffic amount by the second total traffic amount, and calculates the number of registered users corresponding to the domain 150-1 (an average value of unit time set in advance) as a result of the division. Multiplication is performed to calculate the estimated number of accommodated users corresponding to the NW component 111-1.
In this way, the estimated number of accommodated users is calculated for each monitoring target NW component. When the calculation process of the estimated number of accommodated users is completed (Yes in step S106), the estimated influence user number calculation unit 34d then receives information on the estimated expression of the affected influence user and the area coefficient calculation expression from the calculation expression information DB 34b. Is read (step S108). Specifically, the estimated influence user number calculation unit 34d acquires information of the above formulas (3) and (4) from the calculation formula information DB 34b.

Next, the estimated influence user number calculation unit 34d calculates an area coefficient (x, y) for each monitoring target NW component y based on the NW configuration information and the route use traffic information (step S110).
Specifically, the NW component 111-1 is taken as an example of the monitoring target. In this case, as shown in FIG. 2, the number of communication routes of the lowest-layer NW components 113-1 to 113-2 under the NW component 111-1 is to the NW components 112-1 to 112-2. There are four routes including two routes indicated by solid lines extending along and detour routes 120-1 and 120-2 indicated by dotted lines. Therefore, the number of communication routes is “d (x = 150−1, y = 111−1) = 4”.

  Among these communication routes, the bypass route 120-1 is a bypass route to the NW component 112-2 with respect to the NW component 113-1. The NW component 112-2 is an NW component under the NW component 111-1. On the other hand, the detour route 120-2 is a detour route to the NW component 112-3 with respect to the NW component 113-2. The NW component 112-3 is an NW component under the NW component 111-2. Therefore, when the NW component 113-2 uses the bypass route 120-2, it passes through another NW component on the same layer as the 111-1 different from the NW component 111-1. The other two communication routes are a route from the NW component 113-1 to the NW component 112-1 (hereinafter referred to as a first route) and an NW component 113-2 to the NW component 112-2. Route (hereinafter referred to as the second route).

Therefore, the estimated influence user number calculating unit 34d determines the four communication routes of the first route, the second route, and the detour routes 120-1 and 120-2 based on the above equation (4) and the route use traffic information. The NW components 113-1 to 113-2 calculate the total amount of traffic when using these communication routes (hereinafter referred to as total route total traffic amount). Further, the estimated influence user number calculation unit 34d calculates the total amount of traffic when the NW component 113-1 uses the detour route 120-2 (hereinafter referred to as other route total traffic amount). Then, the other route total traffic amount is divided by the total route total traffic amount to calculate the other route use ratio (x = 150-1, y = 111-1). Furthermore, from the above equation (4), “area coefficient (x = 150-1, y = 111-1) = (1-dr (150-1, 111-1)) ^{d (} 150-1, 111-1 ^{) −1} ”is calculated.

Next, the estimated influence user number calculation unit 34d calculates the area coefficient (x, y) calculated based on the above equation (3), and the estimated accommodation user number (x, y) calculated by the estimation accommodation user number calculation unit 34c. Is multiplied to calculate the estimated influence user number (x, y) (step S112).
In this way, the area coefficient (x, y) and the estimated influence user count (x, y) are calculated for each monitoring target NW component constituting the communication network 100. When the calculation process of the area coefficient (x, y) and the estimated influence user number (x, y) is all completed (Yes in step S114), the series of processes is terminated and the process returns to the original process.

Returning to FIG. 10, when the calculation processing of the estimated number of accommodated users and the estimated number of influential users is completed, the calculation unit 34 associates the calculation result with the time zone information at the time of acquiring the traffic information in the estimated influential user number DB 35. Store (step S24).
On the other hand, when a failure such as a failure occurs in any of the NW components constituting the communication network 100, failure notification information for notifying the occurrence of the failure is transmitted from the failed NW component to the monitoring control unit 31 ( Step S26).

Upon receiving the failure notification information from the failed NW component, the monitoring control unit 31 generates alarm information based on the received failure notification information in the alarm management unit 31e (step S28).
Next, the monitoring control unit 31 executes an acquisition process of the estimated number of affected users for the monitoring target NW component in which the failure has occurred in the alarm management unit 31e (step S30).

Specifically, the alarm management unit 31 e transmits alarm information to the calendar function unit 36.
When the calendar function unit 36 receives the alarm information from the monitoring control unit 31, the calendar function unit 36 executes an acquisition process of the estimated influence user number based on the received alarm information (step S32).
When the calendar function unit 36 starts the process of acquiring the estimated influence user number, first, as shown in FIG. 12, the estimated influence user number acquisition part 36a analyzes the alarm information acquired from the monitoring controller 31 ( Step S200). Specifically, the estimated influence user number acquisition unit 36a extracts information indicating the alarm content, second time information, and identification information of the NW component in which the failure has occurred from the acquired alarm information.

  Next, the estimated influence user number acquisition unit 36a determines whether the day indicated by the extracted second time information is a weekday or Sunday (step S202). Here, it is determined that the day indicated by the second time information is a weekday or Sunday (Yes in step S202). In this case, the estimated influence user number acquisition unit 36a corresponds to the first time information in the time zone corresponding to the time indicated by the second time information on the most recent weekday or Sunday in the past, and further corresponds to the extracted identification information. The estimated influence user number to be acquired is acquired from the estimated influence user number DB 35 (step S204). Thereafter, the series of processes is terminated and the process returns to the original process.

  For example, it is assumed that the month / day / day of the week / time indicated by the second time information is 14:20 on Saturday, January 14th. Further, it is assumed that the identification information extracted from the alarm information is “111-1”. In this case, as illustrated in FIG. 13, the estimated influence user number acquisition unit 36 a includes the first corresponding to the time zone from 14:00 to 15:00 on January 7 (Saturday), which is the last Saturday in the past. The estimated influence user count corresponding to the time information and the identification information “111-1” is acquired from the estimated influence user count DB 35.

  Further, for example, it is assumed that the month / day / day of the week / time indicated by the second time information is 16:20 on Monday, January 16th. Further, it is assumed that the identification information extracted from the alarm information is “111-2”. In this case, as shown in FIG. 13, the estimated influence user number acquisition unit 36a is the first corresponding to the time zone from 16:00 to 17:00 on Monday, December 26, which is the most recent Monday in the past. The estimated influence user count corresponding to the 1-time information and the identification information “111-2” is acquired from the estimated influence user count DB 35. That is, since Mondays in the past two weeks are all holidays, the first time information corresponding to the time zone from 16:00 to 17:00 on December 26 (Monday), which is one week in the past, and the identification information “ The estimated influence user number corresponding to “111-2” is acquired.

  On the other hand, it is assumed that the estimated influence user number acquisition unit 36a determines that the day indicated by the second time information is a holiday (Yes in step S206). In this case, the estimated influence user number acquisition unit 36a corresponds to the past latest holiday and the first time information corresponding to the time indicated by the second time information and the estimated influence user number corresponding to the extracted identification information. Is obtained from the estimated influence user count DB 35 (step S208). Thereafter, the series of processes is terminated and the process returns to the original process.

For example, it is assumed that the month / day / day of the week / time indicated by the second time information is 14:20 on January 9 (month / holiday). Further, it is assumed that the identification information extracted from the alarm information is “112-1”. In this case, as illustrated in FIG. 13, the estimated influence user number acquisition unit 36 a first time information corresponding to the time zone from 14:00 to 15:00 on Sunday, January 8, which is the latest holiday. And the estimated influence user number corresponding to the identification information “112-1” is acquired from the estimated influence user number DB 35.
Returning to FIG. 10, the calendar function part 36 transmits the acquired estimated influence user number to the monitoring control part 31 (step S34).
When the monitoring control unit 31 acquires the estimated number of affected users corresponding to the transmitted alarm information from the calendar function unit 36, the monitoring control unit 31 displays the corresponding alarm contents and the estimated number of affected users on the monitoring terminal 500 (step S36).

(3) Operation and Effect In the monitoring system 300 according to the first embodiment, the traffic collection unit 33 manages registered user who configures the monitoring target communication network 100 as the calculation information in a preset time period. It is possible to acquire information on the number of registered users for each domain to which each monitoring target NW component belongs from the apparatus. Further, in the traffic collecting unit 33, the NW configuration of the lowest layer under each of the monitoring target NW components from the traffic information collecting device constituting the monitoring target communication network as the calculation information in a preset time period. It is possible to collect the traffic information between the element and the user communication terminal and the traffic information between the lowest layer NW component and the next higher NW component. Furthermore, the traffic collection unit 33 can store the collected calculation information in the calculation information DB 33c.

  Further, in the estimated accommodation user number calculation section 34c and the estimated influence user number calculation section 34d of the calculation section 34, it is necessary to calculate the estimated accommodation user number and the estimation influence user number from the traffic collection section 33 in a preset time period. It is possible to acquire correct calculation information. Further, in the estimated accommodation user number calculation unit 34c and the estimated influence user number calculation unit 34d, the calculation unit 34 acquires calculation formula information necessary for calculating the estimated accommodation user number and the estimated influence user number from the calculation formula information DB 34b. It is possible. And based on the acquired calculation information and calculation formula information, it is possible to calculate the estimated number of accommodated users and the estimated number of influential users for each monitoring target NW component according to the above formulas (2) to (4).

  Specifically, the calculation unit 34 calculates the estimated number of accommodated users, the number of registered users corresponding to the domain to which the monitoring target NW component belongs, and the lowest level NW component of the monitoring target NW component and the user communication terminal. It is calculated by dividing by the ratio between the sum of numerical values related to traffic between and the sum of numerical values related to traffic between the NW component in the lowest layer of the domain unit to which the monitored NW component belongs and the user communication terminal .

In addition, the calculation unit 34 determines the number of registered users (users) who can avoid the influence by using the detour route from the estimated number of accommodated users when a failure such as a failure occurs in the monitoring target NW component. The estimated influence user number is calculated by multiplying the area coefficient which is a coefficient for subtracting the number of communication terminals).
Further, in the estimated influence user number calculation section 34d, the calculation section 34 can store the estimated accommodated user number and the estimated influence user number in the estimated influence user number DB 35 in association with the first time information.

Further, when the alarm management unit of the monitoring control unit 31 receives the fault notification information from any of the monitoring target NW components, the alarm information is generated based on the received fault notification information, and the generated alarm information is converted to the calendar function unit 36. Can be sent to.
Further, when the alarm information from the monitoring control unit 31 is acquired in the calendar function unit 36, the second time information which is information on the time when the failure occurs and the identification information of the NW component where the failure occurs are included in the alarm information. Based on the estimated influence user count DB 35, the estimated influence user count that matches the preset acquisition condition is acquired. Further, the calendar function unit 36 transmits the acquired estimated influence user number to the monitoring control unit 31.

Here, the calculation of the estimated number of influential users requires traffic aggregation and data collection in NW components, and it takes time to calculate. For this reason, it is often difficult to immediately calculate the estimated number of affected users when a failure is detected. Therefore, in this embodiment, the calendar function unit 36 uses the number of affected users in the case closest to the user usage model at the time of failure detection. That is, when the user communication terminal is a mobile body such as a mobile phone, it is the closest to the population movement pattern, so the same time zone on the same day is the closest.
Furthermore, the monitoring control unit 31 can display on the monitoring terminal 500 the estimated number of influential users acquired from the calendar function unit 36 and information indicating the alarm contents.

From the above, in the communication network 100 in which the number of registered users (number of user communication terminals) corresponding to each domain changes dynamically, if a failure occurs in the monitored NW component, the registration affected by the failure It is possible to immediately confirm an estimated value (number of estimated influence users) with high accuracy of the number of users. As a result, it is possible to accurately grasp the damage situation at the time of the occurrence of a failure from a small-scale failure to a large-scale failure. Therefore, it is possible to report the damage status with high accuracy to the concerned parties, and it is possible to make a recovery plan that gives priority to repair work from the place where the damage is large (the estimated number of affected users is large). Become.
Further, since the estimated number of accommodated users is also stored in the estimated influence user count DB 35, it is possible to confirm the transition of the accommodated user count from the stored estimated accommodated user count. As a result, it is possible to improve the prediction accuracy of equipment enhancement.

(4) Correspondence with the Present Invention In the first embodiment described above, the calculation information acquisition unit 33a, the estimated accommodated user number calculation unit 34c, and the estimated influence user number calculation unit 34d are the registered user number information acquisition unit, the monitoring It corresponds to a unit traffic information acquisition unit and a domain unit traffic information acquisition unit. The estimated accommodation user number calculation unit 34c or the estimated influence user number calculation unit 34d corresponds to a detour route information acquisition unit. The estimated accommodated user number calculating unit 34c corresponds to the estimated accommodated user number calculating unit. The estimated influence user number calculation unit 34d corresponds to the estimated influence user number calculation unit. The estimated influence user number acquisition unit 36a corresponds to a first time information acquisition unit, a second time information acquisition unit, and an estimated influence user number acquisition unit. Step S18 corresponds to a detour route information acquisition step. Step S20 corresponds to a registered user number information acquisition step, a monitoring unit traffic information acquisition step, and a domain unit traffic information acquisition step. Steps S102 to S104 correspond to an estimated accommodated user number calculating step. Steps S108 to S112 correspond to an estimated influence user number calculation step. NW configuration information and route use traffic information correspond to detour route information.

(Second Embodiment)
Next, 2nd Embodiment of this invention is described based on drawing.
(1) Configuration Hereinafter, a second embodiment of a network monitoring device, a network monitoring program, and a network monitoring method according to the present invention will be described with reference to the drawings. 14 to 16 are diagrams showing a second embodiment of the network monitoring apparatus, the network monitoring program, and the network monitoring method according to the present invention.
In this embodiment, the monitoring system 300 in the communication network system 1 of the first embodiment is applied to the communication network 100 having the configuration shown in FIG. 14 instead of the communication network 100 having the configuration shown in FIG. Accordingly, the monitoring system 300 has the same basic configuration and operation contents except for the contents of traffic information to be handled, the contents of arithmetic expressions, the number of registered users and the information from which the traffic information is acquired.

Hereinafter, configurations and operation contents different from those in the first embodiment will be described in detail, and descriptions of the same components and the same operation contents will be omitted as appropriate.
(1-1) Configuration Example of Communication Network 100 FIG. 14 is a diagram illustrating a configuration example of the communication network 100 according to the present embodiment.
In the present embodiment, the communication network 100 is a configuration example of a 3G (3rd Generation) network that is one of mobile communication networks for mobile phones. Hereinafter, the communication network 100 of the present embodiment is referred to as a 3G network 100.
The 3G network is described in detail in “3GPP TS 23.002 Network architecture (http://www.3gpp.org/ftp/Specs/html-info/23002.htm)”.

As shown in FIG. 14, the 3G network 100 includes an HLR 120-1, MSCs 121-1 to 121-n ₃ (n ₃ is a natural number of 1 <n ₃ ), and RNCs 122-1 to 122- n ₄ (n ₄ is a natural number of 2 <n ₄ ).
Further, 3G network 100, the NW components (the n _5, 2 <natural number n ₅₎ BTS123-1~123-n ₅ and a radio area formed by BTS123-1~123-n ₅ 124- 1 to 124-n ₆ (n ₆ is a natural number of 4 <n ₆ ). Further, 3G network 100, the NW components by BTS123-1~123-n _5, cell 125-1~125-n ₇ (n ₇ formed in the wireless area 124-1 to 124-n within ₆ 3 <k <l <m <n < ₇ natural number).

  Here, the cell indicates a radio zone of a certain frequency band. The wireless area indicates a zone in which a plurality of cells having different frequency bands are arranged so as to overlap geographically. That is, the radio area is a zone in which cells of a plurality of different frequency bands are overlaid in the same area (hereinafter, this cell is referred to as an overlay cell). The overlay cell may be formed by the same BTS or may be formed by a plurality of different BTSs. In the example of the overlay cell shown in FIG. 14, cells 125-3 and 125− of different frequency bands formed by the BTS 123-1 and the BTS 123-2 in one of the radio areas 124-2 and 124-3, respectively. k is overlaid.

In this embodiment, the configuration information management unit 32 manages this overlay information. That is, the NW configuration information generated by the configuration information management unit 32 includes overlay cell information.
Further, in the 3G network 100, a LAC (Location Area Code) 151-1 is configured as a domain by the cells 125-1 to 125-m. Furthermore, the cell 125- (m + α) ~125- n 7, as a domain, LAC151-n ₈ (n ₈ is a natural number of 2 ≦ n ₈₎ is formed.

Here, LAC is a calling range of a user communication terminal (in this embodiment, a mobile communication terminal having a mobile phone function). In the present embodiment, one LAC is configured by a plurality of cells.
In the example shown in FIG. 14, for convenience of explanation, each NW component and domain have the number and connection configuration shown in the figure. It varies depending on the situation.

  Further, in the 3G network 100, the relationship between each NW component shall conform to “3GPP TS 23.002”. Therefore, for example, there may be a plurality of HLRs, or each NW component may be configured to straddle a plurality of NW components. Further, the physical line used for connection may be ATM or IP, or a common line may be used. Further, the relationship between each MSC, each RNC, each BTS, each wireless area, and each cell may be a plurality of pairs. In order to realize the IP phone, the MSC may be configured by an IMS (IP Multimedia Subsystem) and a gateway, and the HLR may be configured by a SIP (Session Initiation Protocol) server. Moreover, LAC may configure one LAC for one MSC, may configure a plurality of LACs for one MSC, or configure one LAC for a plurality of MSCs. Or a mixture thereof.

In this embodiment, the W-CDMA system and the VLR system are adopted in the 3G network 100 illustrated in FIG. Here, when the VLR method is adopted, as shown in FIG. 14, MSCs 121-1 to 121-n ₃ hold subscriber profiles in units of LAC. Thus, in this embodiment, the MSC121-1~121-n _3, responsible for registering a user management device. Further, the RNCs 122-1 to 122-n ₄ collect traffic information in units of cells. Accordingly, in the present embodiment, RNC122-1~122-n ₄ is responsible for the traffic information collection device.

(1-2) Configuration Example of Traffic Collecting Unit 33 The traffic collecting unit 33 according to the present embodiment includes the above information from the MSCs 121-1 to 121-n ₃ via the monitoring control unit 31 in the calculation information acquiring unit 33a. corresponding to the registered user number information in the first embodiment, it acquires the located profile information 601-1~601-n ₃ is information indicating the number of subscriber profile that exists in the LAC of LAC units. For example, in-zone profile information 601-1 is information indicating the number of subscriber profiles in the LAC 151-1.

Further, the traffic collection unit 33 receives a cell unit corresponding to the traffic information of the first embodiment from the RNCs 122-1 to 122-n ₄ via the monitoring control unit 31 in the calculation information acquisition unit 33a. to get the traffic information 602-1~602-n _4. Traffic information 602-1~602-n ₄ includes a traffic information, branch addition Completions cell units, Radio Link number of users, the information of the CS / PS calling Completions and CS / PS incoming completions. For example, in the case of the traffic information 602-1, the number of completed branch additions, the number of RadioLink users, the number of CS transmission completions, the number of PS transmission completions, the number of CS reception completions of the cells 125-1 to 125-3 under the RNC 122-1. And information on the number of incoming PS calls.

In the present embodiment, the cell is the lowest layer NW component.
In the present embodiment, since the RNCs 122-1 to 122-n ₄ are configured to collect the traffic information 602-1 to 602-n ₄ , this information is used. Such information is not always collected. Therefore, if the traffic is in the lowest NW component unit and can be compared between each NW component, the number of application transactions or the CPU usage rate may be substituted.

(1-3) Configuration Example of Calculation Unit 34 In the present embodiment, the monitoring target NW components that are targets for calculating the estimated number of affected users are RNCs 122-1 to 122-n ₄ , BTS 123-1 to 123-n _5. and it was radio area 124-1 to 124-n _6. In the present embodiment, has been excluded cell 125-1~125-n ₇ from the monitoring target, it is possible to make the cell monitored. Furthermore, in the present embodiment, the calculation formula (2) for the estimated number of users in the first embodiment is changed to a calculation formula corresponding to the 3G network 100 as shown in the following formula (5). Note that the information on the arithmetic expression is stored in advance in the arithmetic expression information DB 32b.

Therefore, the estimated accommodated user number calculating unit 34c of the present embodiment calculates the estimated accommodated user number corresponding to the monitoring target NW component using the above equation (5).
In the above equation (5), the estimated number of accommodated users (x, y) is the monitoring target NW component y (RNC, BTS or wireless area) belonging to the LACx corresponding to the domain x in the above equation (2). The corresponding estimated number of accommodated users. In the above equation (5), the number of customers (x) corresponds to the number of registered users (x) in the above equation (2) and is the number of subscriber profiles corresponding to LACx. In the above equation (5), n (y) is the total number of cells under the monitoring target NW component y. In the above equation (5), traffic a is information related to communication traffic between the cell and the user communication terminal. In the present embodiment, traffic a is the number of CS transmission completions, the number of PS transmission completions, the number of CS reception completions, and the number of PS reception completions in units of cells. In the present embodiment, traffic a (i) corresponds to the unit total traffic volume, and the CS transmission completion number i, PS transmission completion number i, and CS reception completion number of the cell i under the monitored NW component. i is the sum of i and the number of PS incoming calls i, and corresponds to the unit total traffic amount of the monitoring unit traffic information. Traffic a (j) is the sum of CS transmission completion number j, PS transmission completion number j, CS reception completion number j, and PS reception completion number j of cell j belonging to the same LAC as the LAC to which the monitored NW component belongs. This corresponds to the unit total traffic amount of the domain unit traffic information.

Here, i corresponds to a serial number assigned to information indicating each unit total traffic amount included in the monitoring unit traffic information. Further, j corresponds to a serial number given to information indicating each unit total traffic amount included in the traffic a and domain unit traffic information.
In the above equation (5), tr (i) is the terminal correspondence ratio i.

Here, in the case of the W-CDMA system, even if one cell in the radio area causes a failure by the overlay cell, it is possible to avoid the failure by performing a handover to another cell having a different carrier frequency. Become.
However, the available carrier frequencies and the ratio of the number of user communication terminals corresponding to each carrier frequency are different for each carrier frequency supported by the user communication terminal. Specifically, the supported carrier frequency varies depending on the release date and model of the user communication terminal.

  For example, it is assumed that the 3G network 100 according to the present embodiment is compatible with carrier frequencies A to D [Hz] (hereinafter, units are omitted). In this embodiment, for example, a communication terminal corresponding to the carrier frequency A can use only the cell of the carrier frequency A, and a communication terminal corresponding to the carrier frequency B uses the cells of the carrier frequencies A to D. Suppose it is possible. Further, for example, a communication terminal that supports carrier frequency C can use cells of carrier frequencies A, C, and D, and a communication terminal that supports carrier frequency D uses cells of carrier frequencies A and D. Suppose it is possible. Thus, the carrier frequency that can be used is limited by the carrier frequency corresponding to the user communication terminal. In addition, selecting the cell having the same frequency as the carrier frequency of the handover source cell (hereinafter referred to as the original cell) as the handover destination cell (hereinafter referred to as the destination cell) between the overlay cells is an overlay configuration. It is impossible.

  Therefore, in calculating the estimated number of users, if an overlay cell is considered as an avoidance route, the number of user communication terminals that can be handed over from the original cell to a destination cell of another carrier frequency that can avoid a failure is obtained. Then, it is necessary to subtract the number of user communication terminals that can avoid a failure by handover using an overlay cell from the estimated number of accommodated users.

  In this embodiment, with respect to the carrier frequency (A to D) of the calculation target cell, the RNC corresponding to the monitored NW component (hereinafter referred to as the own RNC) and other cells that form an overlay cell together with the RNC A combination pattern of an overlay cell carrier frequency with an RNC (hereinafter referred to as a different RNC) is set. Then, a corresponding terminal ratio (tr (i)) that is a ratio of the number of user communication terminals that can be supported for each pattern is set for the set combination pattern. The corresponding terminal ratio may be set in advance based on a past measurement value. If the registered user management device is configured to acquire the model information of the user communication terminal as registered user information, the corresponding terminal ratio is calculated and set in real time (or at a preset timing) based on this information. It is good also as a structure.

The corresponding terminal ratio is stored in the arithmetic expression information DB 34b via the editing terminal 550 or the like.
As shown in the above equation (5), this corresponding terminal ratio tr (i) is incorporated in the calculation formula for the estimated number of accommodated users in the present embodiment. The unit total traffic amount i corresponding to the cell i is multiplied by (1-tr (i)).
The calculation formula for the estimated number of users is the same as the formula (3) in the first embodiment, and the calculation formula for the area coefficient is the same as the formula (4) in the first embodiment.

In this embodiment, the other route usage ratio (x, y) is the amount of communication traffic when using each communication route for all communication routes including a detour route that can be used by a cell under the monitoring target NW component y. Relating to the amount of communication traffic when using a communication route whose communication destination is another NW component other than the monitored NW component y other than the monitored NW component y with respect to the sum of the numerical values related to (here traffic b) It is the ratio of the sum of numerical values.
In the present embodiment, the computing unit 34 calculates the other route usage ratio (x, y) based on the following equation (6) using the traffic b in the estimated influence user number calculating unit 34d.

  Here, in the W-CDMA system, a branch is added by moving (handover) from the source cell to the destination cell. In the present embodiment, the traffic collecting unit 33 collects the number of completed branch additions, which is information indicating that the addition of a branch has been completed, as traffic b (corresponding to the route use traffic information in the first embodiment). ing.

In the above equation (6), n (y → ≠ y) is a cell other than y under control of the monitoring target NW component y and a cell whose communication destination is another NW component in the same layer as y. It is the total number. In the above formula (6), n (y) is the same as n (y) in the above formula (5).
In the W-CDMA system, user communication terminals can belong to a maximum of L cells (L is a natural number of 2 ≦ L) (Radio Link). Here, it is assumed that “L = 3” in the following description.

  The user communication terminal uses the strongest radio wave among the cells to which the user communication terminal belongs, or synthesizes and uses two or more radio waves. Further, when a registered user moves in the cell or the radio wave becomes weak due to the convenience of NW components such as BTS, the cell moves to another strong radio wave (handover). Further, depending on the use environment of the user communication terminal such as the shade of a mountain or the shade of a building, it cannot always belong to three cells. Accordingly, there may be other states such as a case where only one user communication terminal belongs to the cell, or a case where only two user communication terminals belong to the cell.

  That is, in the 3G network 100, the number of communication routes with the user communication terminal changes dynamically. Therefore, it is necessary to calculate how many communication routes can be created from traffic (herein referred to as traffic c) indicating the number of cells belonging (number of radio links). In the present embodiment, the arithmetic unit 34 uses the traffic c to calculate the average number of communication routes (x, y) that is the average value of the number of communication routes (x, y) from the following equation (7). In the first embodiment, since an example in which the number of communication routes does not change dynamically has been described, the number of communication routes is calculated from static NW configuration information.

In the present embodiment, the traffic collection unit 33 collects the number of Radio Links as traffic c.
In the above equation (7), traffic c (ij) indicates the number of user communication terminals (number of registered users) equal to the number of Radio Links indicated by Radio LinkIDi in cell j. Specifically, Radio LinkID1 (i = 1) indicates the number of radio links (number of affiliations) 1, Radio LinkID2 (i = 2) indicates the number of radio links 2, and Radio LinkID3 (i = 3) indicates the number of radio links 3. . Further, in the numerator section of the above equation (7), the total sum is calculated after multiplying the number of registered users corresponding to each Radio Link ID by the number i corresponding to each Radio Link ID. As a result, the total number of radio links (the number of communication routes) in all cells under the monitoring target NW component y can be calculated by the numerator term of the above formula (7). In addition, the denominator term in the above equation (7) is the total number of registered users corresponding to each Radio Link ID, and the user communication terminals that form the Radio Link in all cells under the monitoring target NW component y ( The total number of registered users). Therefore, the average value of the number of communication routes of the user communication terminal can be calculated by the above equation (7).

Further, as shown in the above formula (3), the estimated influence user number calculating unit 34d multiplies the estimated area user (x, y) by the calculated area coefficient (x, y) to thereby estimate the influence influence user. The number (x, y) is calculated.
The above equation (7) is an equation when the maximum number L of cells is “3”, and the possible values of i and j in the above equation (7) are changed according to the maximum number of members. There is a need to.

(2) Operation Example of Monitoring System 300 Next, an operation example of the monitoring system 300 of the present embodiment will be described based on FIGS. 10 to 11 and FIGS. 15 to 16 of the first embodiment.
FIG.15 and FIG.16 is a figure which shows an example of a corresponding | compatible terminal ratio with respect to the carrier frequency of each calculation object cell.
Note that, in the following description, the description overlapping with the operation of the first embodiment is omitted as appropriate.

As shown in FIG. 10, NW configuration information is registered in the configuration information management unit 32 (step S10). On the other hand, in the registered user management apparatus 110 constituting the 3G network 100, the number of subscriber profiles is totaled according to a timer trigger generated at a preset timing. In addition, each traffic information collection device (RNC 122-1 to 122-n ₄ ) constituting the 3G network 100 aggregates the collected traffic information according to a timer trigger generated at a preset timing (step S12). ).
Also, the traffic collection unit 33, the configuration information management unit 32, based on the acquired the NW configuration information (step S14), and the obtained NW configuration information, and MSC121-1~121-n _3, RNC122-1~122- Calculation information is obtained from n ₄ (step S16).

Specifically, the traffic collection unit 33 receives the monitoring unit traffic information, the domain from the RNCs 122-1 to 122-n ₄ via the monitoring control unit 31 in the time period set in advance in the calculation information acquisition unit 33a. It acquires traffic information 602-1~602-n ₄ corresponding to the unit traffic information and route available traffic information. Further, operation information acquisition unit 33a is a preset time period, through the monitoring control unit 31, from MSC121-1~121-n _3, serving profile corresponding to LAC151-1~151-n ₈ It acquires the number information 601-1~601-n _3. The calculation information acquisition unit 33a stores the acquired calculation information in the calculation information DB 33c.

Next, the traffic collection unit 33 performs a totaling process for the obtained calculation information (step S17). Specifically, the traffic collection unit 33 aggregates the traffic information among the calculation information acquired by the calculation information acquisition unit 33a for each preset unit time. Further, the calculation processing unit 33b, the registered user number information corresponding to LAC151-1~151-n _8, calculates a preset average value per unit time. Then, the calculation information processing unit 33b stores each calculation result of the calculation information in the calculation information DB 33c.

Next, the calculation unit 34 acquires NW configuration information from the configuration information management unit 32 in the estimated accommodated user number calculation unit 34c. In addition, the estimated influence user number calculating unit 34d acquires NW configuration information from the estimated accommodated user number calculating unit 34c (step S18).
Next, the calculation unit 34 estimates each of the monitoring target NW components from the traffic collection unit 33 based on the NW configuration information acquired in step S18 in the estimated accommodation user number calculation unit 34c and the estimated influence user number calculation unit 34d. Information for calculation necessary for calculating the number of accommodated users and the estimated number of influential users is acquired (step S20).

Next, the calculation unit 34 performs a process for calculating the estimated number of affected users (step S22).
When the estimated influence user number calculation process is started, as shown in FIG. 11, the estimated accommodation user number calculation unit 34c determines whether or not calculation information necessary for calculating the estimated influence user number is acquired ( Step S100). If it is determined that it has not been acquired (No in step S100), the determination process is repeated until it is acquired.

On the other hand, if it is determined that the calculation information has been acquired (Yes in step S100), then, in the estimated accommodation user number calculation unit 34c, the calculation expression necessary for calculating the estimated accommodation user number is calculated from the calculation expression information DB 34b. Information is acquired (step S102).
Specifically, the estimated accommodated user number calculation unit 34c acquires information on the arithmetic expression shown in the above expression (5) from the arithmetic expression information DB 34b.
Next, the estimated accommodated user count calculation unit 34c calculates the estimated accommodated user count for each monitoring target NW component based on the acquired calculation information and calculation formula information (step S104).

For example, it is assumed that the monitoring target NW component is BTS 123-1. In this case, the estimated accommodated user number calculating unit 34c firstly monitors the monitoring unit traffic information (traffic a) of the cell i (i = 125-1 to 125-3) subordinate to the BTS 123-1 among the obtained calculation information. Based on (i)), the sum of the unit total traffic amount i included in the monitored unit traffic information is calculated. In calculating the sum, the corresponding terminal ratio (tr (i)) corresponding to the carrier frequency of the cell i to be calculated and the overlay configuration formed by the cell i is acquired from the arithmetic expression information DB 34b. Then, each unit total traffic amount i is multiplied by (1-tr (i)). That is, the estimated accommodated user number calculating unit 34c calculates the sum of the multiplication results.
Here, the corresponding terminal ratio is set for each combination pattern of the carrier frequencies of the overlay cells formed by the own RNC and the different RNC, as shown in FIGS. 15 and 16, for example.

15 and 16, the calculation target cell is the cell i in the above equation (5). In FIGS. 15 and 16, “-” indicates a state incapable of configuration, “◯” indicates a state where there is a cell of the corresponding carrier frequency, and “X” indicates a state where there is no cell of the corresponding carrier frequency. Show. “Δ” indicates that any state is acceptable. That is, it indicates that the ratio of the corresponding terminals is not affected even if there is a cell having a carrier frequency corresponding to “Δ”.
In this embodiment, for these combination patterns, the corresponding terminal ratio corresponding to each combination pattern is set from the past actual measurement values. As a result, these combination patterns are divided into four patterns of “pattern 0”, “pattern 1”, “pattern 2”, and “pattern 3”.

  Here, “Pattern 0” is a state in which there is no overlay cell formed by different RNCs that can be handed over, as shown in FIGS. 15 and 16. In this case, the corresponding terminal ratio is “0”. “Pattern 1” is a pattern in which there is a cell that can be handed over to a cell under the control of a different RNC, and the carrier frequency of the cell is A, as shown in FIGS. . In this case, since the carrier frequency A is a frequency corresponding to all user communication terminals of other carrier frequencies, the corresponding terminal ratio is “1”. “Pattern 2” is a state in which there is a cell that can be handed over to a cell under the control of a different RNC, and the carrier frequency of that cell is B or C, as shown in FIGS. It is. In addition, “Pattern 3” is a pattern in which there is a cell that can be handed over to a cell under a different RNC and the carrier frequency of the cell is D, as shown in FIGS. 15 and 16. .

  Based on the carrier frequency of the cell i, the setting state of the overlay cell, and the carrier frequency, the estimated accommodated user number calculating unit 34c acquires the corresponding terminal ratio i (tr (i)) corresponding to the cell i from the arithmetic expression information DB 34b. To do. Then, using the acquired tr (i), the numerator term of the above formula (5) is calculated. As a result, the total traffic volume (hereinafter referred to as the first total traffic volume) with the user communication terminal in units of BTS 123-1 per unit time set in advance is calculated.

  Next, the estimated accommodated user number calculating unit 34c converts the domain unit traffic information into the domain unit traffic information based on the domain unit traffic information (traffic a (j)) of the cells 125-1 to 125-m belonging to the LAC 151-1 to which the BTS 123-1 belongs. The sum total of the unit total traffic amount j included is calculated. Thereby, the total traffic amount (hereinafter referred to as the second total traffic amount) with the user communication terminal of the LAC 151-1 unit per unit time set in advance is calculated.

The estimated accommodated user number calculation unit 34c divides the first total traffic amount by the second total traffic amount, and the number of registered users corresponding to the domain 150-1 (the subscriber profile of the preset unit time) is divided into the division result. Multiply by (average value) to calculate the estimated number of accommodated users corresponding to BTS 121-1.
Incidentally, RNC122-1~122-n _4, Similarly, the wireless area 124-1 to 124-n _6, according to the above equation (5), it is possible to calculate the estimated number of users accommodated (x, y) .

  In this way, the estimated number of accommodated users is calculated for each monitoring target NW component configuring the 3G network 100. When the calculation process of the estimated number of accommodated users is completed (Yes in step S106), the estimated influence user number calculation unit 34d then receives information on the estimated expression of the affected influence user and the area coefficient calculation expression from the calculation expression information DB 34b. Is read (step S108). Specifically, the estimated influence user number calculation unit 34d acquires information of the above formulas (3), (4), (6), and (7) from the calculation formula information DB 34b.

Next, the estimated influence user number calculation unit 34d determines, for each monitoring target NW component y, based on the acquired arithmetic expressions (the above expressions (4), (6), and (7)) and the traffic b and c information. An area coefficient (x, y) is calculated (step S110).
Specifically, BTS 123-1 is taken as an example of the monitoring target. In this case, the estimated influence user number calculation unit 34d firstly, among the obtained calculation information, the traffic information (traffic b (i) of the cell i (i = 125-1 to 125-3) under the control of the BTS 123-1. )), The numerator term of the above formula (6) is calculated.

  Traffic b (i) is a user who has handed over to a cell under a BTS other than BTS 123-1 (for example, BTS 123-2) among user communication terminals belonging to cell i under BTS 123-1. For the communication terminal, it is the sum of those branch addition completion numbers (hereinafter referred to as other route addition completion numbers). The estimated influence user number calculation unit 34d adds together the total number of other route addition completions corresponding to the cells 125-1 to 125-3 under the control of the BTS 123-1. As a result, the numerator term in the above formula (6), that is, the total number of user communication terminals handed over from the cell i under the BTS 123-1 to the cell under the BTS other than the BTS 123-1, (Referred to as one handover number).

Next, based on the traffic information (traffic b (j)) of the cell j (j = 125-1 to 125-3) under the control of the BTS 123-1, the estimated influence user number calculating unit 34d uses the above formula (6). Calculate the denominator term.
The traffic b (j) is the sum of the number of completed branch additions of all user communication terminals belonging to the cell j under the BTS 123-1 (hereinafter referred to as the total number of completed route additions). The estimated influence user number calculation unit 34d adds together the total number of all route addition completions respectively corresponding to the cells 125-1 to 125-3 under the control of the BTS 123-1. Thereby, the denominator term of the above equation (6), that is, the total number of user communication terminals handed over from the cell j under the control of the BTS 123-1 to another cell (hereinafter referred to as the second handover number) is calculated. Is done.

The estimated influence user number calculation unit 34d calculates the other route usage ratio (x, y) corresponding to the BTS 123-1 by dividing the first handover number by the second handover number.
Next, the estimated influence user number calculation unit 34d includes Radio LinkIDi (i = 1 to 3) of the cell j (j = 125-1 to 125-3) subordinate to the BTS 123-1 among the obtained calculation information. Based on the traffic information corresponding to (traffic c (ij)), the numerator term in the above equation (7) is calculated.

  Specifically, the estimated influence user number calculating unit 34d multiplies the number of registered users corresponding to the Radio Link ID of each cell j by the number i corresponding to each Radio Link ID, and the multiplication result corresponding to IDs 1 to 3. Calculate the sum of. Then, the sums of the multiplication results corresponding to the cells 125-1 to 125-3 are added. Thereby, the total number of radio links (the number of communication routes) in the numerator term of the above formula (7), that is, the cells 125-1 to 125-3 subordinate to the BTS 123-1 is calculated.

Next, the estimated influence user number calculation unit 34d includes Radio LinkIDi (i = 1 to 3) of the cell j (j = 125-1 to 125-3) subordinate to the BTS 123-1 among the obtained calculation information. Based on the traffic information corresponding to (traffic c (ij)), the denominator term of the above equation (7) is calculated.
Specifically, the estimated influence user number calculating unit 34d calculates the total number of registered users corresponding to the Radio Link ID of each cell j. Thereby, the total number of user communication terminals (number of registered users) forming Radio Link in the cells 125-1 to 125-3 under the control of the BTS 123-1 is calculated.

The estimated influence user number calculating unit 34d calculates the average number of communication routes (x, y) corresponding to the BTS 123-1 by dividing the number of communication routes by the total number of user communication terminals forming the Radio Link. To do.
The estimated influence user number calculation unit 34d calculates an area coefficient (x, y) from the above equation (4). In the present embodiment, d (x, y) in the above equation (4) corresponds to the average number of communication routes (x, y).

Next, the estimated influence user number calculation unit 34d calculates the area coefficient (x, y) calculated based on the above equation (3), and the estimated accommodation user number (x, y) calculated by the estimation accommodation user number calculation unit 34c. Is multiplied to calculate the estimated influence user number (x, y) (step S112).
Similarly, for the RNCs 122-1 to 122 -n ₄ and the wireless areas 124-1 to 124 -n ₆ , the other route passage ratio (x, y) according to the above equations (4) and (6) to (7). It is possible to calculate the average number of communication routes (x, y) and the area coefficient (x, y). Further, similarly for the RNCs 122-1 to 122-n ₄ and the wireless areas 124-1 to 124-n ₆ , it is possible to calculate the estimated influence user number (x, y) according to the above equation (3). .

In this way, the area coefficient (x, y) and the estimated influence user count (x, y) are calculated for each monitoring target NW component constituting the 3G network 100. When the calculation process of the area coefficient (x, y) and the estimated influence user number (x, y) is all completed (Yes in step S114), the series of processes is terminated and the process returns to the original process.
Since the subsequent operation for obtaining the estimated number of affected users when a failure occurs is the same as in the first embodiment, description thereof is omitted.

(3) Actions and Effects The monitoring system 300 in the second embodiment has the following actions and effects in addition to the actions and effects of the first embodiment.
In the traffic collection unit 33, at a predetermined time period, as the calculation information, LAC unit of the serving profile information 601 belonging respectively monitored NW components from MSC121-1~121-n ₃ constituting the 3G network 100 It is possible to collect −1 to 601-n ₃ . Furthermore, the traffic collection unit 33, at a predetermined time period, as the calculation information, traffic information 602-1～ cell units located under the respective NW components monitored from RNC122-1~122-n ₄ 602-n ₄ can be collected. Furthermore, the traffic collection unit 33 can store the collected calculation information in the calculation information DB 33c.

  Further, in the estimated accommodation user number calculation section 34c and the estimated influence user number calculation section 34d of the calculation section 34, it is necessary to calculate the estimated accommodation user number and the estimation influence user number from the traffic collection section 33 in a preset time period. It is possible to acquire accurate calculation information (located profile information, traffic ac). Further, the calculation unit 34 calculates calculation formula information (the above formula) necessary for calculating the estimated number of accommodated users and the number of estimated influence users from the calculation formula information DB 34b in the estimated accommodated user number calculation unit 34c and the estimated influence user number calculation unit 34d. (Information corresponding to (3) to (7)) can be acquired. And based on the acquired calculation information and calculation formula information, it is possible to calculate the estimated number of accommodated users and the estimated number of affected users for each monitoring target NW component according to the above formulas (3) to (7).

  Specifically, the estimated accommodated user number calculation unit 34c of the calculation unit 34 adds (1-corresponding terminal ratio tr) to the traffic a (i) of the cell i subordinate to the monitoring target NW component y based on the above equation (5). It is possible to calculate the sum (first total traffic amount) of the result of multiplying (i)). Furthermore, the estimated accommodated user number calculating unit 34c can calculate the total (second total traffic amount) of the traffic a (j) of the cell j in the LACx unit to which the monitoring target NW component y belongs. And the estimated accommodation user number calculation part 34c apportions the number of in-zone persons (x) corresponding to LAC to which the monitoring object NW component belongs by the ratio of the first total traffic volume and the second total traffic volume. Thus, it is possible to calculate the estimated number of accommodated users (x, y).

In addition, the calculation unit 34 calculates the area coefficient (x, y) using the traffic b to c based on the above equations (4) and (6) to (7) in the estimated influence user number calculation unit 34d. It is possible. At this time, the average number of communication routes can be calculated by using the number of Radio Links as the traffic c. Further, by using the branch addition completion number as the traffic b, it is possible to calculate the other route use ratio.
Furthermore, the estimated influence user number calculation unit 34d can calculate the estimated influence user number (x, y) by multiplying the estimated accommodation user number (x, y) by the area coefficient (x, y). It is.

  From the above, when a failure occurs in the monitored NW component in the 3G network 100, a highly accurate estimated value (the estimated number of affected users) of the number of registered users affected by the failure is immediately confirmed. Is possible. Thereby, it becomes possible to grasp the damage situation at the time of failure occurrence from a small-scale failure to a large-scale failure. Therefore, it is possible to report the state of damage with high accuracy to all concerned parties, and it is possible to make a recovery plan such as preferential repair work from the place where the damage is large (the estimated number of affected users is large). It becomes.

Further, since the estimated number of accommodated users is also stored in the estimated influence user count DB 35, it is possible to confirm the transition of the accommodated user count from the stored estimated accommodated user count. As a result, it is possible to improve the prediction accuracy of equipment enhancement.
In calculating the area coefficient, the average number of communication routes is calculated using the number of Radio Links as the traffic c. As a result, for example, even when the communication route dynamically changes due to movement of the user communication terminal, as in the W-CDMA 3G network 100, it is possible to calculate a relatively reliable area coefficient. Become.

(4) Correspondence with the Present Invention In the second embodiment described above, the calculation information acquisition unit 33a, the estimated accommodated user number calculation unit 34c, and the estimated influence user number calculation unit 34d are the registered user number information acquisition unit, the monitoring It corresponds to a unit traffic information acquisition unit and a domain unit traffic information acquisition unit. The estimated accommodation user number calculation unit 34c or the estimated influence user number calculation unit 34d corresponds to a detour route information acquisition unit. The estimated accommodated user number calculating unit 34c corresponds to the estimated accommodated user number calculating unit. The estimated influence user number calculation unit 34d corresponds to the estimated influence user number calculation unit. The estimated influence user number acquisition unit 36a corresponds to a first time information acquisition unit, a second time information acquisition unit, and an estimated influence user number acquisition unit. The estimated influence user number calculation unit 34d corresponds to the estimated influence user number calculation unit. The arithmetic expression information DB 34b corresponds to the corresponding terminal ratio information storage unit. Step S18 corresponds to a detour route information acquisition step. Step S20 corresponds to a registered user number information acquisition step, a monitoring unit traffic information acquisition step, and a domain unit traffic information acquisition step. Steps S102 to S104 correspond to an estimated accommodated user number calculating step. Steps S108 to S112 correspond to an estimated influence user number calculation step. Traffics b and c correspond to detour route information, traffic b corresponds to other route utilization ratio information, and traffic c corresponds to communication route number information.

(5) Modification (5-1) In the second embodiment, the example in which the monitoring system 300 according to the present invention is applied to the 3G network 100 has been described. The monitoring system 300 according to the present invention is not limited to this configuration, and can be applied to the LTE (Long Term Evolution) network (hereinafter referred to as the LTE network 100) configured as shown in FIG. It is. Here, FIG. 17 is a diagram illustrating a configuration example of the LTE network.

The LTE is described in detail in “3GPP TS 23.402 Architecture Reference Model (http://www.3gpp.org/ftp/Specs/html-info/23402.htm)”.
As shown in FIG. 17, the LTE network 100 includes a mobility control function (MME: Mobility Management Entity), a base station (eNB: eNodeB), and an HSS (Home Subscriber Server) as NW components. The

  In the LTE network 100, the relationship between each NW component shall conform to “3GPP TS 23.402”. Accordingly, there may be a plurality of HSSs, and each NW component may be configured to straddle a plurality of NW components. Also, the physical line used for connection may be ATM or IP, or a common line may be used. The relationship between each MME, each eNB, each radio area, and each cell may be a plurality of pairs.

In the LTE network 100, it is possible to group a plurality of MMEs and a plurality of eNBs (hereinafter, this group is referred to as an MME group) so as to have a highly fault-tolerant network configuration. In an MME group, an eNB can communicate with a plurality of MMEs, and the MME manages subscribers (registered users) registered in its own device. Therefore, when calculating the estimated number of accommodated users, an LAC unit Instead of apportioning the number of registered users (number of subscriber profiles), the number of registered users in units of MME groups is apportioned by traffic in units of monitored NW components. In addition, as the number of registered users (number of people in the area), the total value of the registered users of all MMEs in the MME group is used. Further, in the LTE network 100, as the traffic a of the NW component, since the eNB holds the number of completed data and the number of completed accesses for each cell, these are used. Further, in the LTE network 100, as the traffic b of the NW component, for example, traffic corresponding to the number of completed branch additions of the 3G network such as the number of band distributed HO completion is used. In the LTE network 100, the number of Active users corresponding to the number of RadioLinks in the 3G network is used as the traffic c of the NW component. Since the traffic information is managed by the eNB, the traffic collection unit 33 collects various types of traffic information from the eNB via the monitoring control unit 31.
By using these pieces of information, the calculation unit 34 uses the equations (3) to (7) of the second embodiment, and similarly to the second embodiment, the estimated accommodation user number, the area coefficient, and the estimation It is possible to calculate the number of affected users.

(5-2) In the first embodiment, the example in which the monitoring system 300 according to the present invention is applied to the communication network 100 having the configuration shown in FIG. 2 has been described. The monitoring system 300 according to the present invention is not limited to this configuration, and can be applied to the NGN (Next Generation Network) 100 having the configuration shown in FIG. Here, FIG. 18 is a diagram illustrating a configuration example of the NGN.
The NGN is described in detail in “ITU-T Recommendation Y.2006 (http://www.itu.int/rec/T-REC-Y.2006-200802-I)”.

As shown in FIG. 18, the NGN 100 is configured to include a transport stratum, a service stratum, and a management function as NW components. Furthermore, the NGN 100 is connected to an application, another network, and a client network.
The transport stratum includes a GW (Gateway), an ANF (Access Network Functions), a CTF (Core Transport Functions), a transport control function, and an EF (Edge Functions).
ANF and CTF are connected via EF. The ANF corresponds to, for example, CATV, xDSL, radio, optical fiber network, and the like, and there is a CN (Client Network) to which the user belongs. The CTF is connected to a telephone network or another company network.

  The transport control function is configured by NACF (Network Attachment Control Functions), RACF (Resource and Admission Control Functions), and TUP DB (Transport User Profile Functions DataBase). Subscriber information is stored in the TUP DB, and the user profile and terminal authentication are managed in the NACF using the subscriber profile obtained from the TUP DB, and the availability of network resources is managed in the RACF. In the NGN 100, the function and connection configuration of each NW component conform to “ITU-T Y.2000 series”. Accordingly, the NGN 100 may include a plurality of ANFs, CTFs, and SCFs. Further, the configuration information management unit 32 manages the static NW configuration of the NGN 100.

The service stratum includes a service control and content delivery function (SCF), an application support function and service support function (ASF), and a service user profile data base (SUP DB).
The SUP DB, the SCF, and the ASF are connected to each other. The SCF performs connection setting and bandwidth management, and generally corresponds to a SIP server group or the like. ASF can provide services in cooperation with other networks and applications. The SUP DB is a DB that holds a subscriber profile.

The application (AP) is an application for providing various services provided by a 3rd party, a user company, or a carrier. The AP may be a mashup using a web service API, or a service enabler as defined in “OMA (Open Media Alliance) Service Environment”.
The other network may be another NGN network, a Web on the Internet, a corporate LAN, or a PSTN / ISDN network.

  In the NGN 100, the NACF manages the assignment of the IP address from the configuration of the user equipment and the subscriber profile. Therefore, the traffic collection unit 33 uses the monitoring control unit 31 or the management function for each ANF held by the NACF. Get the number of active subscriber profiles. Similarly, traffic in units of GW is acquired. The traffic information in units of GW may be, for example, the number of connection requests or the CPU usage rate, as long as comparison is possible between GWs.

  The calculation unit 34 acquires the traffic information collected by the traffic collection unit 33 based on the network configuration acquired from the configuration information management unit 32, and estimates the GW unit based on the formula (2) of the first embodiment. The number of accommodated users is calculated. For example, the estimated number of accommodated users per GW is calculated by “number of accommodated users per GW = number of subscriber profiles per ANF per NACF × (traffic amount of the corresponding GW ÷ traffic amount of all GWs under ANF)”.

  Further, the NGN may have a mesh structure, and in that case, even if the GW breaks down, it can be bypassed. Therefore, the detourable ratio is calculated as an area coefficient according to the equation (4) of the first embodiment. Then, according to the equation (3) of the first embodiment, the estimated influence user count is calculated by multiplying the estimated accommodation user count in GW by the area coefficient.

(5-3) In the above embodiment, the case where there is traffic information that the traffic collection unit 33 could not acquire is not particularly considered, but is not limited to this configuration. For example, the corresponding time of the corresponding NW component may be an abnormal value, or may be substituted by reusing the estimated accommodated user number data previously calculated and accumulated via the calendar function unit 36.
(5-4) In the second embodiment, the area coefficient is also calculated for the wireless area. However, the present invention is not limited to this structure, and the estimated accommodated number of users is not changed for the wireless area without multiplying the area coefficient. It is good also as a structure calculated as an estimated influence user number. With this configuration, calculation efficiency can be improved.

(5-5) In the second embodiment, the cell is excluded from the NW components to be monitored. However, the configuration is not limited to this, and the cell may be the monitoring target.
(5-6) In the first embodiment, the static NW configuration information is used for calculating the number of communication routes. However, the configuration is not limited to this. It is good also as a structure which calculates the number of communication routes based on the traffic information between a user communication terminal and NW component like Formula (7) of the said 2nd Embodiment.

(5-7) In the above embodiment, as the network monitoring apparatus according to the present invention, the monitoring control unit 31, the configuration information management unit 32, the traffic collection unit 33, the calculation unit 34, the estimated influence user number DB 35, Although the monitoring system 300 having the configuration including the calendar function unit 36 has been described as an example, the configuration is not limited to this configuration. For example, the network monitoring apparatus includes a configuration information management unit 32, a traffic collection unit 33, a calculation unit 34, an estimated influence user number DB 35, and a calendar function unit 36, which are components other than the monitoring control unit 31. May be.
(5-8) In the above embodiment, a network having a hierarchical structure has been described as an example of the communication network 100. However, the present invention is not limited to this configuration. For example, the monitoring device 300 according to the present invention may be applied to a network having no hierarchical structure such as an overlay network using a peer-to-peer method.

The above embodiments are preferable specific examples of the present invention, and various technically preferable limitations are given. However, the scope of the present invention is described in particular in the above description to limit the present invention. As long as there is no, it is not restricted to these forms. In the drawings used in the above description, for convenience of illustration, the vertical and horizontal scales of members or parts are schematic views different from actual ones.
In addition, the present invention is not limited to the above-described embodiments, and modifications, improvements, equivalents, and the like within the scope that can achieve the object of the present invention are included in the present invention.

DESCRIPTION OF SYMBOLS 1 Communication network system 100 Communication network 200 Maintenance network 300 Monitoring system 400 User communication terminal 31 Monitoring control part 32 Configuration information management part 33 Traffic collection part 34 Operation part 34b Calculation formula information DB
34c Estimated accommodation user number calculation unit 34d Estimated influence user number calculation unit 35 Estimated influence user number DB
36 Calendar function unit 36a Estimated influence user number acquisition unit

Claims (10)

A network monitoring device for monitoring a network component to be monitored with respect to a plurality of network components constituting a communication network system that provides a predetermined communication service to a communication terminal used by a registered user,
The communication network system includes, as part of the plurality of network components, a registered user management device that is a device that manages registered users for each domain that is a management range on the network, and information relating to traffic of the network component A traffic information collecting device that is a device for collecting
A registered user number information acquisition unit that acquires information indicating the number of registered users corresponding to the domain to which each of the monitored network components belongs, from the registered user management device;
A monitoring unit traffic information acquisition unit for acquiring monitoring unit traffic information, which is information relating to traffic between the communication terminal and the network component in the network component unit to be monitored, from the traffic information collection device;
A domain unit traffic information acquisition unit that acquires domain unit traffic information, which is information relating to traffic between the communication terminal in domain units to which the network component to be monitored belongs and the network component from the traffic information collection device. When,
Information indicating the number of registered users acquired by the registered user number information acquisition unit, and the monitoring target traffic information and the domain unit traffic information acquired by the monitoring unit traffic information acquisition unit and the domain unit traffic information acquisition unit Based on the number of registered users corresponding to the domain to which each of the monitored network components belongs, for each monitored network component, the numerical value relating to the traffic of the monitored network component unit, An estimated accommodated user who calculates an estimated accommodated user number, which is an estimated value of the number of registered users using the communication service, corresponding to each of the monitored network components, and is distributed in proportion to a numerical value related to traffic. A network monitor characterized by comprising: Apparatus. The communication network system includes a detour route that is a communication route capable of detouring the monitored network component in which a failure has occurred,
A detour route information acquisition unit that acquires detour route information that is information related to the detour route;
Based on the number of accommodated users calculated by the estimated accommodated user number calculation unit and the detour route information acquired by the detour route information acquisition unit, for each network component to be monitored, each network component to be monitored An estimated influential user number calculating unit for calculating an estimated influential user number, which is the number of registered users estimated to be affected by the disability when a failure occurs,
The estimated influence user number calculation unit subtracts the estimated influence user number from the estimated accommodated user number by subtracting the number of registered users corresponding to the communication terminal that can avoid the influence of the failure by using the bypass route. The network monitoring apparatus according to claim 1, wherein the network monitoring apparatus calculates the network monitoring apparatus. The communication network system has a network configuration in which the plurality of network components are hierarchically connected for each function,
The monitoring unit traffic information acquisition unit acquires, as the monitoring unit traffic information, information related to traffic of all the lowermost network components under each of the monitored network components,
The domain unit traffic information acquisition unit acquires, as the domain unit traffic information, information related to traffic of all lowermost network components belonging to the same domain as the domain to which each of the monitored network components belongs,
The estimated accommodated user number calculation unit calculates the number of registered users corresponding to the domain as a sum of numerical values related to traffic of all the lowermost network components under the monitoring target network component and the domain. 3. The network monitoring apparatus according to claim 2, wherein the estimated number of accommodated users is calculated by dividing the ratio with a sum of numerical values related to traffic of all the lowermost network constituent elements to which the network element belongs. The detour route information acquisition unit includes, as the detour route information, communication route number information that is information related to the number of communication routes including the detour route of the lowermost network component under each of the monitored network components. Of the communication routes corresponding to the communication route number information, the lowermost network component is not affected by the failure that has occurred in the monitored network component and is in the same layer as the monitored network component Obtain other route usage rate information, which is information related to the rate of using other network components as detour destinations,
The estimated influence user number calculation unit uses the bypass route according to the following formula (1) based on the communication route number d based on the communication route number information and the other route use rate dr based on the other route use rate information. Calculating an area coefficient, which is a coefficient for reducing the number of registered users that can avoid the influence of the failure, and multiplying the number of accommodated users by calculating the estimated influence user number. The network monitoring device according to claim 3.
Area coefficient = (1-dr) ^d-1 (1) The communication network system is a mobile communication network system that provides a predetermined communication service by wireless communication to a mobile communication terminal used by the registered user,
The mobile communication network system includes, as part of the plurality of network components, a plurality of radio base stations, a plurality of radio areas formed by the radio base stations, and the radio base stations in each radio area. A plurality of cells that are the lowermost network components formed in
The monitoring unit traffic information acquisition unit acquires, as the monitoring unit traffic information, information related to traffic of all the cells under the network component to be monitored,
The domain unit traffic information acquisition unit acquires, as the domain unit traffic information, information related to traffic of all the cells belonging to the same domain as the domain to which the network component to be monitored belongs. The network monitoring device according to claim 3 or 4. The plurality of radio base stations form an overlay area in which a plurality of cells having different carrier frequencies exist in the same radio area,
The bypass route includes a communication route for handing over from one cell in the overlay area to another cell having a different carrier frequency from the cell,
A corresponding terminal ratio information storage unit that stores corresponding terminal ratio information that is information indicating a corresponding ratio of the mobile communication terminal with respect to a combination of carrier frequencies of the other cell that is a handover destination from the one cell; ,
Based on the corresponding terminal ratio information corresponding to each cell under each of the monitored network components stored in the corresponding terminal ratio information storage unit, the estimated influence user number calculation unit is calculated from the number of accommodated users. The network monitoring apparatus according to claim 5, wherein the estimated number of affected users is calculated by reducing the number of registered users who can avoid the influence of the failure by using a detour route by the overlay area. The registered user number information acquisition unit, the monitoring unit traffic information acquisition unit, and the domain unit traffic information acquisition unit correspond to each of the network components to be monitored in a preset time period. , Execute acquisition processing of the monitoring unit traffic information and the domain unit traffic information,
The estimated accommodated user number calculation unit and the estimated influence user number calculation unit are configured to monitor the network configuration of the monitoring target based on the registered user number information acquired in the time period, the monitoring unit traffic information, and the domain unit traffic information. Calculating the number of accommodated users and the estimated number of affected users in a preset time unit corresponding to each element;
A first time information acquisition unit that acquires first time information that is time information at the time of acquiring the registered user number information, the monitoring unit traffic information, and the domain unit traffic information;
The estimated influential user number corresponding to each of the monitoring target network components calculated by the estimated influential user number calculation unit is used as the monitoring unit traffic information and the domain unit traffic information used for calculating the estimated influential user number. An estimated influence user number storage unit that stores the corresponding first time information in association with the first time information;
When it is determined that a failure has occurred in the monitored network component, a second time information acquisition unit that acquires second time information that is time information at the time of the failure;
Based on the second time information acquired by the second time information acquisition unit, from the estimated influence user number storage unit to the first time information that matches an acquisition condition set in advance for the second time information. The network monitoring apparatus according to claim 3, further comprising an estimated influence user number acquisition unit that acquires a corresponding estimated influence user number. The first time information and the second time information include at least information on a month, a day, a day of the week, and a time,
When the estimated influence user number acquisition unit determines that the day indicated by the second time information is a weekday or Sunday, the same day of the week and the nearest time as the second time information of the most recent weekday or Sunday in the past. If the estimated influence user number corresponding to one time information is acquired as the estimated influence user number that matches the acquisition condition, and it is determined that the day indicated by the second time information is a holiday, the second in the last holiday in the past The network monitoring apparatus according to claim 7, wherein the estimated number of influential users corresponding to the first time information at a time closest to the time indicated by the time information is acquired as an estimated influential user number that matches the acquisition condition. A network executed in a computer provided with a network monitoring device for monitoring a network component to be monitored, regarding a plurality of network components constituting a communication network system that provides a predetermined communication service to a communication terminal used by a registered user A monitoring program,
The communication network system includes, as part of the plurality of network components, a registered user management device that is a device that manages registered users for each domain that is a management range on the network, and information relating to traffic of the network component A traffic information collecting device that is a device for collecting
A registered user number information acquisition step for acquiring information indicating the number of registered users corresponding to the domain to which each of the monitored network components belongs, from the registered user management device;
A monitoring unit traffic information acquisition step for acquiring monitoring unit traffic information, which is information relating to traffic between the communication terminal and the network component in the network component unit to be monitored, from the traffic information collection device;
Domain unit traffic information acquisition step of acquiring domain unit traffic information, which is information relating to traffic between the communication unit in the domain unit to which the network component to be monitored belongs and the network component from the traffic information collection device When,
Information indicating the number of registered users acquired in the registered user number information acquisition step, and the monitoring unit traffic information and the domain unit traffic information acquired in the monitoring unit traffic information acquisition step and the domain unit traffic information acquisition step. Based on the number of registered users corresponding to the domain to which each of the monitored network components belongs, for each monitored network component, the numerical value relating to the traffic of the monitored network component unit, An estimated accommodated user who calculates an estimated accommodated user number, which is an estimated value of the number of registered users using the communication service, corresponding to each of the monitored network components, and is distributed in proportion to a numerical value related to traffic. A number calculating step, Network monitoring program comprising a program to be executed by the computer. A network monitoring method using a network monitoring device for monitoring a network component to be monitored for a plurality of network components constituting a communication network system that provides a predetermined communication service to a communication terminal used by a registered user. And
The communication network system includes, as part of the plurality of network components, a registered user management device that is a device that manages registered users for each domain that is a management range on the network, and information relating to traffic of the network component A traffic information collecting device that is a device for collecting
A registered user number information acquisition step in which the network monitoring device acquires information indicating the number of registered users corresponding to the domain to which each of the monitored network components belongs, from the registered user management device;
Monitoring unit traffic in which the network monitoring device acquires monitoring unit traffic information that is information relating to traffic between the communication terminal and the network component in the network component unit to be monitored from the traffic information collection device An information acquisition step;
The network monitoring device acquires domain unit traffic information, which is information related to traffic between the communication terminal in the domain unit to which the network component to be monitored belongs and the network component from the traffic information collection device. A domain unit traffic information acquisition step;
Information indicating the number of registered users acquired in the registered user number information acquisition step, the monitoring unit traffic information acquired in the monitoring unit traffic information acquisition step and the domain unit traffic information acquisition step, and Based on domain unit traffic information, for each network component to be monitored, the number of registered users corresponding to the domain to which each network component to be monitored belongs is a numerical value relating to the traffic in units of the network component to be monitored And an estimated number of accommodated users, which is an estimated value of the number of registered users who use the communication service, corresponding to each of the monitored network components, which is apportioned by a ratio with the numerical value relating to the traffic in domain units Calculate the estimated number of accommodated users Network monitoring method characterized by comprising the steps, a.

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