JP5201021B2 - Network congestion monitoring system and network congestion monitoring method - Google Patents

Description

  The present invention relates to a network congestion monitoring system and a network congestion monitoring method.

  In a network using Ethernet (registered trademark) and IP (Internet Protocol) technologies, many redundant paths are often created to prevent communication disconnection. Increasing redundant routes in this way leads to an increased risk of communication congestion on the network. Therefore, congestion control technology is required for such a network. One of the congestion controls is a mechanism in which a threshold of traffic is set in advance in a network device, and it is determined that congestion has occurred in the network when communication exceeding the threshold flows.

  For example, JP 2008-236307 A discloses a network monitoring apparatus and a network monitoring method. The network monitoring device determines congestion of the monitoring target device based on a traffic value sent from the monitoring target device. The network monitoring apparatus includes a traffic accumulation unit, a calculation unit, and a congestion determination unit. The traffic accumulation unit accumulates the traffic value sent from the monitoring target device. The calculation unit calculates a traffic calculation value used when performing congestion determination from the traffic value stored in the traffic storage unit. The congestion determination unit uses the determination target value that is a traffic value that is a target of congestion determination among the traffic values sent from the monitoring target device, or the calculated traffic value as a threshold value at the time of congestion determination, and the determination target value and The threshold is compared, and congestion of the monitoring target device is determined based on the comparison result.

  Japanese Patent Laid-Open No. 2003-124954 discloses a network congestion control system, a congestion control node, and a congestion control program. This congestion control system controls congestion on communication on a network. In this congestion control system, a plurality of congestion control nodes provided on the network that perform congestion control on communication data to be transmitted or relayed include congestion detection means, congestion notification means, reception means, and congestion flow estimation means. . Here, the congestion detection means detects the degree of communication congestion in the congestion control node. The congestion notification unit notifies the congestion control node on the network of the congestion information detected by the congestion detection unit. The means for receiving receives the congestion information from the other congestion control node. The congestion flow estimation means refers to the congestion information and a routing table for designating a transfer route to the communication destination, and determines a flow whose degree of congestion is more than a predetermined value on the transfer route to the communication destination. presume.

  Japanese Patent Laid-Open No. 10-65687 discloses an ATM network congestion control system. The ATM network congestion control system includes a calling subscriber switching node for starting call setting, a receiving subscriber switching node for receiving the call, the calling subscriber switching node, It is an asynchronous transfer mode communication network comprising a plurality of relay switching nodes connecting between receiving side subscriber switching nodes. This ATM network congestion control system has a search means, a monitoring means, a notification means, and a switching means. The search means is provided in each of the originating side subscriber switching node and each of the nodes serving as transmission path branching points of the plurality of relay switching nodes, and detours from the own branching point to the next branching point on the receiving side Explore the road. The monitoring means monitors traffic on a transmission line provided at each of the plurality of relay exchange nodes and connected to the own node. The notifying means notifies the adjacent node on the transmission side of congestion information of the transmission path that is provided in each of the plurality of relay switching nodes and is based on the monitoring result of the monitoring means. Switching means is provided in the originating side subscriber exchange node and each of the nodes serving as transmission path branching points of the plurality of relay exchange nodes, and the congestion information from the notification means of the adjacent node on the destination side Thus, when it is notified that the transmission path is congested, the transmission path is switched to the path with the lowest traffic volume among the detours searched by the search means.

Japanese Patent Laid-Open No. 2003-124954 JP 2008-236307 A Japanese Patent Laid-Open No. 10-65687

  In the case of a mechanism for determining the presence or absence of congestion based on the threshold value as described above, it is only possible to determine the presence or absence of congestion only in terms of whether or not the communication flow rate exceeds the threshold value. For this reason, the effect of congestion suppression is greatly influenced by a single threshold setting. That is, there is a problem that the accuracy of congestion detection deteriorates unless an appropriate threshold is set in advance.

  An object of the present invention is to provide a network congestion monitoring system and a network congestion monitoring method having a mechanism for accurately detecting network congestion.

  In order to solve the above problems, a network congestion monitoring system according to the present invention is a network congestion monitoring system for monitoring congestion of a communication network. The network congestion monitoring system determines congestion of the communication network based on a plurality of actual communication states in a plurality of network devices provided in the middle of the communication line of the communication network.

  Moreover, the congestion determination apparatus of this invention is a congestion determination apparatus of the network congestion monitoring system which monitors the congestion of a communication network. The congestion determination apparatus determines congestion of the communication network based on a plurality of actual communication states in a plurality of network devices provided in the middle of the communication line of the communication network.

  The congestion judgment network device of the present invention is a congestion judgment network device of a network congestion monitoring system that monitors congestion of a communication network. The congestion determination network device determines congestion of the communication network based on a plurality of actual communication states provided in a plurality of network devices including the congestion determination network device provided in the middle of the communication line of the communication network.

  The network congestion monitoring method of the present invention is a network congestion monitoring method for monitoring congestion of a communication network. This network congestion monitoring method determines congestion of a communication network based on a plurality of actual communication states in a plurality of network devices provided in the middle of the communication line of the communication network.

  The program of the present invention is a program for a congestion judgment device of a network congestion monitoring system that monitors congestion of a communication network. This program causes a computer to execute a method for determining congestion of a communication network based on a plurality of actual communication states in a plurality of network devices provided in the middle of the communication line of the communication network.

  The program of the present invention is a program for a congestion determination network device of a network congestion monitoring system that monitors congestion of a communication network. This program causes a computer to execute a method of determining congestion of a communication network based on a plurality of actual communication states in a plurality of network devices including a congestion determination network device provided in the middle of a communication line of a communication network.

  The present invention can provide a mechanism for accurately detecting network congestion.

FIG. 1 is a block diagram showing a configuration of a network congestion monitoring system according to an embodiment of the present invention. FIG. 2 is a block diagram showing in detail the configuration of the network congestion monitoring system according to the first embodiment of the present invention. FIG. 3 is a table showing an example of a communication state determination table according to the first embodiment of the present invention. FIG. 4 is a table showing an example of a communication state table according to the first embodiment of the present invention. FIG. 5 is a table showing an example of a communication state table according to the first embodiment of the present invention. FIG. 6 is a table showing an example of a communication state table according to the first embodiment of the present invention. FIG. 7 is a flowchart showing the operation of the network congestion monitoring system according to the first embodiment of the present invention. FIG. 8 is a table showing another example of the communication state determination table according to the first embodiment of the present invention. FIG. 9 is a block diagram showing in detail the configuration of the network congestion monitoring system according to the second embodiment of the present invention. FIG. 10 is a flowchart showing the operation of the network congestion monitoring system according to the second embodiment of the present invention.

  Hereinafter, embodiments of a network congestion monitoring system and a network congestion monitoring method of the present invention will be described with reference to the accompanying drawings.

(First embodiment)
The configuration of the network congestion monitoring system according to the first embodiment of the present invention will be described. FIG. 1 is a block diagram showing a configuration of a network congestion monitoring system according to the first embodiment of the present invention. The network congestion monitoring system 1 monitors the congestion of the communication network 2. The network congestion monitoring system 1 includes a network device 20, a congestion determination device 10, and a monitoring control device 30.

  Here, the communication network 2 which is a monitoring target network area of the network congestion monitoring system 1 is a network in which a plurality of information processing apparatuses 40 are connected so as to be capable of bidirectional communication. The communication network 2 is exemplified by a LAN (Local Area Network), a WAN (Wide Area Network), and the Internet. The communication network 2 forms a network by the communication line 4 via the network device 20 and connects the information processing apparatuses 40 so as to be capable of bidirectional communication. The communication line 4 may be a wired line, a wireless line, or a combination thereof.

  The network device 20 is connected in the middle of the communication line 4 and is used for bidirectional communication between the information processing apparatuses 40. The network device 20 is communicably connected to the congestion determination device 10 via the communication line 4 or another communication line. The network device 20 further monitors and detects the communication state in the communication network 2 and outputs it as the communication state information 51 to the congestion determination device 10. The communication state is exemplified by a flow rate of communication performed via the network device 20 (example: number of input / output packets) and whether the flow rate exceeds a preset threshold value. The network device 20 is exemplified by a communication device or a monitoring device used on a network such as a router or a wireless base station. The communication network 2 is configured to have a redundant path by the network device 20 and the communication line 4.

  The congestion determination device 10 is an information processing device that monitors the communication state of the entire communication network 2. It is determined whether or not congestion occurs in the entire communication network 2. That is, the congestion determination device 10 receives the communication state information 51 from the plurality of network devices 20 in the monitoring target network area, and determines whether or not congestion occurs in the entire communication network 2. Then, the determination result is output to the monitoring control device 30. In the congestion determination device 10, one of the network devices 20 may have the function.

  The monitoring control device 30 receives the determination result from the congestion determination device 10, and outputs a command for executing processing corresponding to the congestion to each network device 20 when the congestion occurs. In this case, it is preferable that the network device 20 outputs a command for executing processing corresponding to congestion in cooperation with each other. You may output via the congestion determination apparatus 10. FIG. Moreover, the monitoring control apparatus 30 and the congestion determination apparatus 10 may be integrated.

  The setting of the range of the communication network 2 (the range of the monitoring target network area) is not particularly limited. For example, a range related to a plurality of network devices 20 (described later) connected to one congestion determination device 10 is used. be able to. In the example of this figure, the network device 20 (M1 to M7) connected to one congestion determination device 10 and the communication line 4 connected to the network device 20 are used for communication of the information processing device 40. The communication network 2 is in the range of the monitoring target network area.

FIG. 2 is a block diagram showing in detail the configuration of the network congestion monitoring system according to the first embodiment of the present invention.
The network device 20 includes a communication state detection unit 21 and a communication state communication unit 22. The communication status detection unit 21 monitors parameters to be monitored related to communication via the network device 20 and detects the communication status of the network device 20. For example, the communication state of the network device 20 such as the flow rate of communication performed via the network device 20 (example: number of input / output packets) or whether the flow rate exceeds a threshold value is detected. At that time, a plurality of stages can be provided for the threshold value. In addition to the flow rate (number of input / output packets), the parameter to be monitored can be used as long as it is data indicating the state of the network. The communication state communication unit 22 transmits the detected communication state as the communication state information 51 to the congestion determination device 10.

The congestion determination device 10 includes a communication state communication unit 11, a communication state table creation unit 12, a communication state determination unit 13, and a communication state determination table 14.
The communication state determination table 14 is a table showing a relationship between a combination of communication states of the network devices 20 and the degree of congestion of the entire communication network 2 and is created in advance. Details will be described later.
The communication status communication unit 11 receives the communication status information 51 from each network device 20.
The communication state table creation unit 12 includes a communication state table (combination of communication states) 52 indicating the communication state of each network device 20, and based on the communication state information 51 newly transmitted from the network device 20, the communication state The table 52 is updated (created).
Based on the communication state table 52, the communication state determination unit 13 refers to the communication state determination table 14 to determine the presence / absence of congestion of the entire communication network 2, the degree of congestion (severe, medium, and mild). Then, the determination result 53 is output to the monitoring control device 30. The communication state table creation unit 12, the communication state determination unit 13, and the communication state determination table 14 can be viewed as the communication information analysis unit 15 together.

  The communication state detection unit 21 and the communication state communication unit 22 can be realized by hardware in the network device 20, software, or a combination of hardware and software. The communication state communication unit 11, the communication state table creation unit 12, the communication state determination unit 13, and the communication state determination table 14 are realized by hardware in the congestion determination apparatus 10, software, or a combination of hardware and software. Is possible.

  FIG. 3 is a table showing an example of a communication state determination table according to the first embodiment of the present invention. The communication state determination table 14 is a table showing a relationship between a combination of communication states indicated by the network device 20 and the degree of congestion of the entire communication network 2 and is created in advance. In the example of this figure, it corresponds to the configuration of the communication network 2 shown in FIG. Here, the combination of communication states indicated by the network device 20 is a combination indicating which network device 20 among the M1 to M7, which is the network device 20, is performing communication at a flow rate exceeding the threshold value. In the communication status determination table 14, the network device 20 that performs communication at a flow rate exceeding the threshold is indicated by “*”. The degree of congestion indicates the seriousness of the occurring congestion, and congestion A to congestion D are set. However, the blank field is ignored.

  When congestion actually occurs in the communication network 2, the amount of communication of information increases with little deviation, and a plurality of network devices 20 exceed the threshold value. Therefore, if a result exceeding the threshold value occurs in at least two or more of the plurality of network devices 20, it can be considered that congestion has actually occurred in the communication network 2. However, it is dependent on the configuration of the communication network 2 whether it is determined that congestion is caused when a result exceeding the threshold is generated in which two or more network devices 20 except when the threshold is exceeded in all the network devices 20. FIG. 3 shows an example of the communication status determination table 14 for the example of the configuration of the communication network 2 shown in FIG.

  The communication state determination table 14 is set so that when the flow rate exceeding the threshold value is generated in all the M1 to M7 in the network device 20, the congestion is determined to be the most serious congestion A. Further, in the network device 20, when the flow rate exceeding the threshold value is generated in M5 to M7, the communication state determination table 14 is set so that the congestion is determined as the congestion B that is the second most serious. Yes. In addition, when the flow rate exceeding the threshold value is generated in M5 to M6 among the network devices 20, the communication state determination table 14 is set so that the congestion is determined to be the third most serious congestion C. Yes. Further, in the network device 20, when the flow rate exceeding the threshold value is generated in M1 to M4, the communication state determination table 14 is set so that it is determined that the congestion is the fourth most serious congestion D. Yes. Therefore, a combination of generation of flow rates exceeding the threshold value in other network devices 20 is not determined that the communication state of the entire communication network 2 is congestion.

  For example, referring to the configuration of the communication network 2 in FIG. 1 and the communication state determination table 14 in FIG. 3, among the network devices 20, M5 to M7 that tend to concentrate communication may involve communication of a plurality of information processing apparatuses 40. The impact of the congestion is high. Therefore, if the flow rate exceeds the threshold value, it is determined that the congestion is relatively high (congestion B, C). On the other hand, since the number of information processing devices 40 related to M1 to M4 is small among the network devices 20, if the flow rate exceeds the threshold, it is determined that the congestion is at a relatively low level (congestion D). Yes.

  4 to 6 are tables showing examples of the communication state table according to the first embodiment of the present invention. However, in each communication status table 52, in each network device 20, a case where the communication flow rate exceeds the threshold is indicated by “x” (cross), and a case where the communication flow rate does not exceed the threshold is indicated by “◯”. (Circled).

  In the example of the communication state table 52 shown in FIG. 4, information is hardly communicated in the configuration of the communication network 2 of FIG. 1. Therefore, the communication flow rate (communication amount) does not exceed the threshold in all of the network devices 20 from M1 to M7. Therefore, it is considered that the communication state of the entire communication network 2 is not congestion. The congestion determination device 10 can determine that the communication state of the entire communication network 2 is not congestion by referring to the communication information determination table 14 of FIG.

  The example of the communication state table 52 shown in FIG. 5 is a case where the communication flow rate (communication amount) has increased to some extent in the configuration of the communication network 2 of FIG. In this case, for example, the communication flow rate exceeds the threshold at a location where communication is concentrated, such as M7 of the network device 20. However, even in that case, the other network devices 20 (M1 to M6) do not exceed the threshold value, so the communication state of the entire communication network 2 is considered not to be congested. The congestion determination device 10 can determine that the communication state of the entire communication network 2 is not congestion by referring to the communication information determination table 14 of FIG.

  The example of the communication state table 52 shown in FIG. 6 is a case where the communication flow rate (communication amount) further increases in the configuration of the communication network 2 of FIG. When congestion actually occurs in the communication network 2, the amount of communication of information increases without a bias, and a result that the threshold is exceeded in a plurality of network devices 20 occurs. In this case, the flow rate of communication exceeds the threshold in M1 and M5 to M7, which are the plurality of network devices 20. Therefore, it is considered that the communication state of the entire communication network 2 is congestion. The congestion determination device 10 can determine that the communication state of the entire communication network 2 is congestion (congestion B) by referring to the communication information determination table 14 of FIG.

  FIG. 7 is a flowchart showing the operation (network congestion monitoring method) of the network congestion monitoring system according to the first embodiment of the present invention. In the initial stage of the operation, all communication states in the communication state table 52 are recorded with the communication flow rate equal to or lower than the threshold value.

  The communication state detection unit 21 of each network device 20 monitors the communication state (step S01). When the communication state detection unit 21 detects a change in the communication state (step S02: YES), the communication state communication unit 22 transmits the communication state to the congestion determination device 10 as communication state information 51 (step S03). In addition, when the change of a communication state is not detected (step S02: NO), the communication state detection part 21 monitors the communication state as it is (step S01).

  The communication state communication unit 11 of the congestion determination device 10 receives the communication state information 51 from each network device 20 (step S04). Based on the received communication state information 51, the communication state table creation unit 12 of the congestion determination device 10 changes / updates the content of the communication state table 52 immediately before it is held (step S05). And it outputs to the communication status determination part 13 as a new communication status table 52. FIG. The communication state determination unit 13 compares the communication state table 52 with the communication state determination table 14 (step S06). When the communication state shown in the new communication state table 52 corresponds to the congestion shown in the communication state determination table 14 (step S07: YES), the communication state determination unit 13 determines that the communication network 2 is in a state of congestion as a whole. It is determined that Then, the determination result 53 is notified to the monitoring control device 30 (step S08). When it does not correspond to the congestion (step S07: NO), it returns to the state waiting for reception of the communication state information 51 (step S04).

  In response to the received determination result 53, when the communication network 2 is in a state of congestion as a whole, the monitoring control device 30 outputs a command for executing processing corresponding to the congestion to each network device 20. (Step S09).

  As described above, the operation (network congestion monitoring method) of the network congestion monitoring system according to the first embodiment of the present invention is executed.

  In the above case, when the communication state detection unit 21 detects a change in the communication state, the communication state communication unit 22 transmits the communication state as the communication state information 51 to the congestion determination apparatus 10. However, the present invention is not limited to that example. For example, the communication state detection unit 21 detects a communication state at predetermined time intervals, and the communication state communication unit 22 determines the detected communication state as a communication state. Information 51 may be transmitted to the congestion determination device 10. In this case, since each network device 20 transmits the latest communication state information 51 at predetermined time intervals, the congestion determination device 10 can always grasp the latest communication state accurately. Further, the communication state table creation unit 12 does not need to store the immediately previous communication state table 52.

  In the present embodiment, not only one network device 20 but also a plurality of network devices 20 measure the flow rate (communication amount) of each communication, and determine the presence or absence of congestion based on the measurement result. As a result, for example, it is determined that congestion has occurred due to a temporary increase in the amount of traffic on a single network device, but it can be prevented from erroneously detecting congestion, such as when it is not actually congestion. be able to. In other words, it is possible to improve the accuracy of detecting congestion on the communication network.

  In the present invention, attention is paid to the difference between the normal state and the congestion state in order to increase the detection accuracy. In the normal state, the communication flow rate tends to be unevenly distributed, but in the congested state, the communication flow rate tends to increase evenly. In the present invention, the presence or absence of congestion is determined using the presence or absence of this bias. That is, conventionally, the flow rate of communication is measured separately by each network device, and the measured communication flow rate is individually used in each network device. However, in the present invention, in order to measure the presence / absence of the communication flow rate deviation (presence / absence of congestion), the flow rate measurement results for a plurality of network devices are brought together, and the congestion is judged by taking into consideration in combination. I did it. Specifically, even when the communication flow rate of one network device exceeds the threshold value, it is not immediately determined that there is congestion, but it is confirmed whether there is another network device exceeding the threshold value. If other network devices do not exceed the threshold, it can be seen that only the flow rate of the network device of interest has increased. On the other hand, when other network devices exceed the threshold, it is understood that congestion has occurred. Thus, according to the present invention, it is possible to improve the accuracy of detecting congestion on the communication network.

  Note that the communication state determination table 14 shown in FIG. 3 is not limited to this example. FIG. 8 is a table showing another example of the communication state determination table according to the first embodiment of the present invention. FIG. 8 shows an example of the communication status determination table 14 for the example of the configuration of the communication network 2 shown in FIG. In this case, the communication state detection unit 12 of the network device 20 has a plurality of threshold values. For example, when the communication flow rate is equal to or higher than the first threshold value, when the communication flow rate is equal to or higher than the second threshold value, and when it is equal to the third threshold value. The communication state information 51 is generated.

  In the communication status determination table 14, when the communication flow rate is equal to or higher than the first threshold value and lower than the second threshold value, “1”, when the communication flow rate is equal to or higher than the second threshold value and lower than the third threshold value, “2” is equal to or higher than the third threshold value. Is indicated as “3”. Further, as the degree of congestion, severe congestion, medium congestion A, medium congestion B, and light congestion are set.

  The communication state determination table 14 is set so that when the flow rate exceeding the second threshold value is generated in all the M1 to M7 among the network devices 20, the congestion is determined to be the most severe congestion. . Further, in the network device 20, when the flow rate exceeding the second threshold value is generated in M5 and M6 and the flow rate exceeding the M7 first threshold value is generated, the congestion is the second most serious congestion A. So that the communication status determination table 14 is set. Further, in the network device 20, when the flow rate exceeding the first threshold value is generated in M5 to M6, the communication state determination table 14 is determined so that the congestion is determined to be the medium congestion B where the congestion is the third most serious. Is set. Further, in the network device 20, when the flow rate exceeding the third threshold value is generated in M1 to M4, the communication state determination table 14 is set so that it is determined that the congestion is the fourth most serious congestion. Has been. Therefore, a combination of generation of flow rates exceeding the threshold value in other network devices 20 is not determined that the communication state of the entire communication network 2 is congestion.

  Also in this case, the effect of the present embodiment similar to the above case can be obtained. In addition, since the threshold of the flow rate of communication is divided in detail, it becomes possible to make the detection accuracy of congestion on the communication network more precise and highly accurate.

(Second Embodiment)
The configuration of the network congestion monitoring system according to the second embodiment of the present invention will be described. FIG. 9 is a block diagram showing details of the configuration of the network congestion monitoring system according to the second embodiment of the present invention. The network congestion monitoring system 1 includes a communication network 2, a management device 10a, and a monitoring control device 30.

  In the present embodiment, the network device 20 may have a distributed function. That is, at least one of the network devices 20 includes a function for detecting congestion (communication state determination unit 23) and a communication state determination table (communication state determination table 24) in addition to the function of the first embodiment. To do. Other network devices 20 are the same as those in the first embodiment. Correspondingly, the management device 10a provided instead of the congestion determination device is provided with a function (communication state table creation unit 12 and communication state table 52) for grasping the communication state of the entire communication network 2. Since each configuration is basically the same as that of the first embodiment except that the affiliation is different, the description thereof is omitted. The communication state determination unit 23 and the communication state determination table 24 can also be viewed as the communication information analysis unit 25 as a unit.

  FIG. 10 is a flowchart showing the operation (network congestion monitoring method) of the network congestion monitoring system according to the second embodiment of the present invention.

  The communication state detection unit 21 of each network device 20 monitors the communication state (step S21). When the communication state detection unit 21 detects a change in the communication state (step S22: YES), the communication state communication unit 22 transmits the communication state as communication state information 51 to the management apparatus 10a (step S23). In addition, when the change of a communication state is not detected (step S22: NO), the communication state detection part 21 monitors the communication state as it is (step S21).

  The communication status communication unit 11 of the management device 10a receives the communication status information 51 from each network device 20 (step S24). Based on the received communication status information 51, the communication status table creation unit 12 of the management device 10a changes / updates the content of the communication status table 52 just before it has (step S25). And it outputs to the network apparatus 20 provided with the function which detects a congestion, and a communication status determination table as a new communication status table 52 (step S26).

  The communication state communication unit 22 of the network device 20 receives the communication state table 52 from the management device 10a (step S27). The communication state determination unit 23 of the network device 20 compares the communication state table 52 with the communication state determination table 24 (step S28). When the communication state shown in the new communication state table 52 corresponds to the congestion shown in the communication state determination table 24 (step S29: YES), the communication state determination unit 23 determines that the communication network 2 is in a state of congestion as a whole. It is determined that Then, the determination result 53 is notified to the monitoring control device 30 (step S30). When the congestion is not dealt with (step S29: NO), the network device 20 returns to the communication state monitoring state (step S21).

  When the communication network 2 is in a state of congestion as a whole in response to the determination result 53 received by the congestion, the monitoring control device 30 issues a command for executing processing corresponding to the congestion to each network device 20. Output (step S31).

  As described above, the operation (network congestion monitoring method) of the network congestion monitoring system according to the second embodiment of the present invention is executed.

  Also in this embodiment, the same effect as in the first embodiment can be obtained. In addition, the configuration of the management apparatus 10a can be simplified by including the network device 20 with a function of detecting congestion.

  The present invention can be applied to all networks using Ethernet (registered trademark) and IP.

  The program and data structure of the present invention may be recorded on a computer-readable storage medium and read into the information processing apparatus from the storage medium.

  The present invention is not limited to the embodiments described above, and it is obvious that the embodiments can be appropriately modified or changed within the scope of the technical idea of the present invention. Each technique in each embodiment can be used in other embodiments as long as there is no technical contradiction.

DESCRIPTION OF SYMBOLS 1, 1a Network congestion monitoring system 2 Communication network 4 Communication line 10 Congestion determination apparatus 10a Management apparatus 11 Communication state communication part 12 Communication state table preparation part 13, 23 Communication state determination part 14, 24 Communication state determination table 20 Network apparatus 21 Communication Status detection unit 22 Communication status communication unit 30 Monitoring and control device 40 Information processing device 51 Communication status information 52 Communication status table 53 Determination result

Claims (9)

A network congestion monitoring system for monitoring communication network congestion,
A plurality of network devices provided in the middle of the communication line of the communication network ;
A management device connected to the plurality of network devices;
Comprising
The plurality of network devices detect a plurality of actual communication states in the plurality of network devices ,
The management device receives the plurality of actual communication states from the plurality of network devices, and transmits to the congestion determination network device that is one of the plurality of network devices,
The network congestion monitoring system, wherein the congestion determination network device determines congestion of the communication network based on the received plurality of actual communication states . The network congestion monitoring system according to claim 1 ,
Each of the plurality of network devices is
A communication state detection unit that detects whether the communication flow rate is equal to or higher than a preset flow rate as the actual communication information;
The congestion determination network device further includes:
A communication state communication unit that receives the plurality of actual communication states from the management device;
A network congestion monitoring system, comprising: a communication state analysis unit that determines congestion of the communication network based on the received plurality of actual communication states. The network congestion monitoring system according to claim 2 ,
The communication state analysis unit
Preset communication state determination data indicating a relationship between a combination of a plurality of communication states in the plurality of network devices and a degree of congestion of the communication network;
A network congestion monitoring system comprising: a communication state determination unit that determines a degree of congestion of the communication network by referring to the communication state determination data based on communication state data as a combination of the plurality of actual communication states. A congestion determination network device of a network congestion monitoring system for monitoring congestion of a communication network,
A plurality of actual communication states in a plurality of network devices including the congestion determination network device provided in the middle of a communication line of the communication network, and a management device connected from the plurality of network devices to the plurality of network devices. A communication state communication unit to receive via,
A communication state analysis unit for determining congestion of the communication network based on the received plurality of actual communication states ;
Congestion determination network equipment comprising: The congestion determination network device according to claim 4 ,
The communication state analysis unit
Preset communication state determination data indicating a relationship between a combination of a plurality of communication states in the plurality of network devices and a degree of congestion of the communication network;
A congestion determination network device comprising: a communication state determination unit that determines a degree of congestion of the communication network by referring to the communication state determination data based on communication state data as a combination of the plurality of actual communication states. A network congestion monitoring method for monitoring communication network congestion,
The plurality of network devices detecting a plurality of actual communication states in a plurality of network devices provided in the middle of a communication line of the communication network ;
The congestion determination network device, which is one of the plurality of network devices, receives the plurality of actual communication states from the plurality of network devices via a management device connected to the plurality of network devices. When,
The congestion determination network device determining congestion of the communication network based on the received plurality of actual communication states ;
A network congestion monitoring method comprising : The network congestion monitoring method according to claim 6 ,
Wherein the step of determination,
Based on the communication state data indicating a combination of the plurality of actual communication conditions, preset communication state showing the relationship between the degree of congestion of the communication network with the combination of a plurality of communication state in the plurality of network devices Referring to decision data, network congestion monitoring method comprising away Te' flop to determine the degree of congestion of the communication network. A congestion determination network device program for a network congestion monitoring system for monitoring communication network congestion,
A communication state communication unit of the congestion determination network device is provided in the middle of the communication line of the communication network, and a plurality of actual communication states in a plurality of network devices including the congestion determination network device, from the plurality of network devices, Receiving via a management device connected to the plurality of network devices;
A step of determining a congestion of the communication network based on the received actual communication states by the communication state analysis unit of the congestion determination network device ;
A program for causing a computer to execute a method comprising : The program according to claim 8 , wherein
Wherein the step of determination,
The communication state analysis unit indicates a relationship between a combination of a plurality of communication states in the plurality of network devices and a degree of congestion of the communication network based on communication state data as a combination of the plurality of actual communication states. Referring to preset communication state determination data, program comprising away step to determine the extent of congestion of the communication network.

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