WO2016117303A1 - 通信制御システム、通信制御方法、およびそのための記録媒体 - Google Patents
通信制御システム、通信制御方法、およびそのための記録媒体 Download PDFInfo
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- WO2016117303A1 WO2016117303A1 PCT/JP2016/000153 JP2016000153W WO2016117303A1 WO 2016117303 A1 WO2016117303 A1 WO 2016117303A1 JP 2016000153 W JP2016000153 W JP 2016000153W WO 2016117303 A1 WO2016117303 A1 WO 2016117303A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/14—Network analysis or design
- H04L41/142—Network analysis or design using statistical or mathematical methods
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/04—Network management architectures or arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/34—Signalling channels for network management communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
- H04L43/103—Active monitoring, e.g. heartbeat, ping or trace-route with adaptive polling, i.e. dynamically adapting the polling rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/62—Establishing a time schedule for servicing the requests
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0893—Assignment of logical groups to network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
- H04L43/0829—Packet loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0852—Delays
Definitions
- the present invention relates to a communication control system, a communication control method, and a recording medium therefor, and more particularly to a communication control system, a communication control method, and a recording medium therefor in a system for centrally managing a network.
- each node periodically grasps the link state and status between nodes by exchanging messages such as LLDP (Link Layer Discovery Protocol) and Keep Alive.
- LLDP Link Layer Discovery Protocol
- Keep Alive a controller that centrally manages the network receives a message that notifies the status and status from each node that knows the link status and status. By doing so, the controller grasps the state and status of the network within the range managed by the controller.
- the notification message to the controller increases due to the increase in the number of nodes in the network, and the load on the controller increases.
- Patent Document 1 discloses a monitoring system corresponding to such an increase in load.
- the center device of the monitoring system of Patent Literature 1 determines the reception time interval in consideration of increase / decrease in processing load according to the number of terminal devices so that the message reception interval according to its own processing capability is reached.
- the reception time interval indicates an interval at which the center device itself receives a message from each terminal device.
- the transmission interval of the terminal device is set so that the transmission interval of the terminal device having a higher occurrence frequency of the request information from the center device becomes shorter.
- the center device preferentially monitors the terminal device that the center device wants to monitor with priority.
- Patent Document 2 discloses an information sharing space providing system.
- the information sharing space providing system of Patent Document 2 includes the following configuration.
- First, the synchronization control information management unit, the object information management unit, and the invitation unit of each of the plurality of terminals reflect the group control to the storage units of these terminals.
- group control includes operations on shared objects, member addition, group creation, and the like performed between these terminals.
- Second, each message control unit of those terminals notifies the processing contents to other terminals constituting the group.
- the terminal receiving the notification reflects it in the same manner. By doing so, the information sharing space providing system shares information with a group of arbitrarily selected members.
- Patent Document 3 discloses a mobile communication system that transmits and receives data using a shared channel.
- the base station apparatus of the mobile communication system of Patent Document 3 includes the following configuration.
- the in-zone confirmation signal generating means generates a in-zone confirmation signal for the first mobile station device among the mobile station devices in the coverage area.
- the first mobile station apparatus is a mobile station apparatus that has transitioned to the intermittent reception state and / or the intermittent transmission state.
- the in-zone confirmation signal is a signal for confirming that the first mobile station apparatus is in the area.
- the in-zone confirmation signal transmission control means controls to transmit the in-zone confirmation signal to the second mobile station apparatus among the first mobile station apparatuses in transition.
- the second mobile station apparatus is a mobile station apparatus that has passed the time during which the intermittent reception state and / or the intermittent transmission state exceeds the in-zone confirmation signal transmission cycle.
- the base station apparatus determines that the mobile station apparatus is in the area when it can receive a response to the area confirmation signal from the mobile station apparatus that has transmitted the area confirmation signal. .
- Patent Document 4 discloses a device support service (DAS (Device Assisted Services)) for protecting network capacity.
- DAS Device Assisted Services
- the DAS monitors network service usage activity of communication devices in network communications.
- DAS classifies network service usage activities for differential network access control to protect network capacity.
- DAS associates network service usage activity with a network service usage control policy based on the classification of network service usage activity to facilitate differential network access control to protect network capacity. .
- the network must be usable as much as possible. That is, there is a problem of making the network reliability as high as possible.
- the reliability of the network depends on the frequency with which the network is monitored. In other words, the higher the frequency, the quicker the response to the trouble that has occurred in the network. Therefore, the higher the frequency, the higher the reliability of the network. On the other hand, the lower the frequency of monitoring, the lower the reliability of the network.
- the monitoring system described in Patent Document 1 described above has a problem that desired reliability for the entire network may not be satisfied.
- the reason is whether or not the processing capability of the center device is sufficient to process the entire network when the transmission interval of the terminal device that the center device of the monitoring system wants to focus on is shorter. Because there is no.
- the message transmission interval of the terminal device to be monitored with priority is determined without considering the processing capability of the center device. For this reason, the center apparatus may not be able to satisfy desired reliability for the entire network.
- An object of the present invention is to provide a communication control system, a communication control method, and a recording medium therefor that can solve the above-described problems.
- the communication control system provides the state notification signal based on a load state of a control device that controls a node included in a network and receives a content of a control signal transmitted and received between the nodes as a state notification signal.
- Status notification signal processing capability grasping means for grasping the ability to process the network, and monitoring area recognizing means for determining an area classification including any number of the nodes based on network state information relating to communication on the network;
- a transmission interval control signal transmitting means for calculating a transmission interval of the status notification signal in the node for each area division based on the capability, and transmitting the transmission interval to the node included in the area division; including.
- the communication control method is based on the load state of a control device in which a computer controls a node included in a network and receives the content of a control signal transmitted and received between the nodes as a state notification signal. Understand the ability to process the status notification signal, determine an area classification including any number of the nodes based on network status information related to communication on the network, and based on the capability, the area For each section, the transmission interval of the status notification signal in the node is calculated, and the transmission interval is transmitted to the nodes included in the area section.
- a computer-readable recording medium is based on a load state of a control device that controls a node included in a network and receives a content of a control signal transmitted and received between the nodes as a state notification signal. , Grasping the ability to process the status notification signal, determining an area division including any number of the nodes based on network status information related to communication on the network, and based on the capability, For each area segment, a program for calculating a transmission interval of the status notification signal in the node and causing the computer to execute processing for transmitting the transmission interval to the nodes included in the area segment is stored.
- the effect of the present invention is that desired reliability for the entire network can be obtained.
- FIG. 1 is a diagram showing an example of a network configuration in the first embodiment of the present invention.
- the network 40 includes a controller (also referred to as a communication control system) 10 and a plurality of nodes 20. Regardless of the example shown in FIG. 1, the network 40 may include any number of nodes 20.
- Each node 20 exchanges a state monitoring signal 803 with an adjacent node.
- an adjacent node in a certain node 20 is another node 20 having a direct link with the node 20 itself.
- the state monitoring signal 803 is, for example, a message such as Keep Alive, LLDP, or OAM (Operation Administration and Maintenance).
- the node 20 sends the contents of the state monitoring signal 803 received from the adjacent node to the controller 10 as a state notification signal 804.
- the transmission interval is information indicating a lower limit value of the interval at which the node 20 transmits the state notification signal 804.
- FIG. 2 is a block diagram showing the configuration of the controller 100 according to the first embodiment of the present invention.
- the controller 100 is one specific example of the controller 10 shown in FIG.
- the controller 100 includes a status notification signal receiving unit 101, a controller load monitoring unit 102, a status notification signal processing capability grasping unit 103, a network status monitoring unit 104, a monitoring area recognition unit 105, and a transmission interval calculation unit 106. , And a transmission interval control signal transmission unit 107.
- Each component shown in FIG. 2 may be a hardware unit circuit, a module included in a microchip, or a component divided into functional units of a computer device.
- a case will be described as an example where the components shown in FIG. 2 are components divided into functional units of the computer apparatus.
- the controller 100 shown in FIG. 2 may be mounted on a certain server and made available via a network. Further, each component of the controller 100 shown in FIG. 2 may be distributed and installed on the network to be usable.
- the status notification signal receiving unit 101 receives the status notification signal 804 from the node 20.
- the controller load monitoring unit 102 monitors the load on the controller 100.
- the controller load monitoring unit 102 transmits the result obtained by monitoring the load to the state notification signal processing capability grasping unit 103 as a load monitoring result 812.
- the status notification signal processing capability grasping unit 103 receives the load monitoring result 812 from the controller load monitoring unit 102. Based on the load monitoring result 812, the state notification signal processing capability grasping unit 103 grasps the ability to process the state notification signal 804 received by the controller 100. The status notification signal processing capability grasping unit 103 transmits the result of grasping the capability as capability information 813 to the transmission interval calculating unit 106.
- the network status monitoring unit 104 monitors the status of the network 40.
- the network state monitoring unit 104 transmits the result obtained by monitoring the state to the monitoring area recognition unit 105 as a network state monitoring result 814.
- the monitoring area recognition unit 105 receives the network state monitoring result 814 from the network state monitoring unit 104.
- the monitoring area recognition unit 105 divides the monitoring area into area sections based on the network state monitoring result 814.
- the monitoring area recognition unit 105 transmits the information on the area division as area division information 815 to the transmission interval calculation unit 106.
- FIG. 3 is a diagram showing an example of monitoring area division by the monitoring area recognition unit 105 in the first embodiment of the present invention.
- the circle in the figure indicates the node 20.
- a line connecting the circles indicates a link.
- a monitoring area (an area composed of a plurality of nodes 20 included in the network 40 and controlled by the controller 10) is divided into a plurality of area sections. By dividing the monitoring area into these area sections, the controller 100 can change the transmission interval of the status notification signal 804 for each area section.
- the area section may include an enclave, that is, a node 20 having no direct link (not adjacent).
- the transmission interval calculation unit 106 receives the above-described capability information 813 from the status notification signal processing capability grasping unit 103. Further, the transmission interval calculation unit 106 receives the above-described area division information 815 from the monitoring area recognition unit 105. The transmission interval calculation unit 106 calculates a transmission interval for each area segment based on the capability information 813 and the area segment information 815. The transmission interval calculation unit 106 transmits the calculated transmission interval to the transmission interval control signal transmission unit 107 as transmission interval information 816.
- the transmission interval control signal transmission unit 107 receives the transmission interval information 816 from the transmission interval calculation unit 106. Based on the transmission interval information 816, the transmission interval control signal transmission unit 107 transmits a transmission interval control signal 805 including transmission interval information 816 corresponding to the area section for each node 20 included in each area section.
- FIG. 4 is a block diagram showing a configuration of the node 200 in the first exemplary embodiment of the present invention.
- the node 200 is one specific example of the node 20 shown in FIG.
- the node 200 includes a state monitoring signal receiving unit 201, a state notification signal transmitting unit 202, a transmission interval control signal receiving unit 203, and a state monitoring signal transmitting unit 204.
- the state monitoring signal receiving unit 201 receives the state monitoring signal 803 from the adjacent node, and transmits information related to the state monitoring signal 803 to the state notification signal transmitting unit 202.
- the state notification signal transmitting unit 202 receives information related to the state monitoring signal 803 from the state monitoring signal receiving unit 201.
- the status notification signal transmission unit 202 transmits a status notification signal 804 to the controller 100 based on the information.
- the transmission interval control signal receiving unit 203 receives from the controller 100 a transmission interval control signal 805 including the transmission interval information 816 of the status notification signal 804.
- the transmission interval control signal receiving unit 203 transmits the transmission interval information 816 to the state monitoring signal transmission unit 204 based on the transmission interval control signal 805.
- the state monitoring signal transmission unit 204 receives the transmission interval information 816 from the transmission interval control signal reception unit 203, and changes the transmission interval of the state monitoring signal 803 based on the received transmission interval information 816.
- the state monitoring signal transmission unit 204 transmits a state monitoring signal 803 based on the changed transmission interval.
- the state monitoring signal 803 in the area section including the node 200 is transmitted and received at the changed transmission interval. Therefore, the status notification signal transmission unit 202 transmits the status notification signal 804 at the changed transmission interval.
- FIG. 5 is a block diagram showing a configuration of the node 210 in the first exemplary embodiment of the present invention.
- the node 210 is another specific example of the node 20 shown in FIG.
- the node 210 includes a state monitoring signal receiving unit 211, a state notification signal transmitting unit 212, a transmission interval control signal receiving unit 213, and a state monitoring signal transmitting unit 214.
- the state monitoring signal receiving unit 211 is the same as the state monitoring signal receiving unit 201 shown in FIG.
- the state monitoring signal transmission unit 214 transmits the state monitoring signal 803 at an arbitrary interval.
- the sending interval control signal receiving unit 213 receives a sending interval control signal 805 including sending interval information 816 from the controller 100.
- the transmission interval control signal receiving unit 213 transmits the transmission interval information 816 to the state notification signal transmission unit 212 based on the transmission interval control signal 805.
- the status notification signal transmission unit 212 receives the transmission interval information 816 from the transmission interval control signal reception unit 213, and changes the transmission interval of the status notification signal 804 based on the received transmission interval information 816.
- the status notification signal transmission unit 212 transmits the status notification signal 804 based on the changed transmission interval.
- FIG. 6 is a diagram showing a hardware configuration of a computer 700 that realizes the controller 100 according to the first embodiment of the present invention.
- the computer 700 includes a CPU (Central Processing Unit) 701, a storage unit 702, a storage device 703, an input unit 704, an output unit 705, and a communication unit 706. Further, the computer 700 includes a recording medium (or storage medium) 707 that is supplied from the outside and is attached to the storage device 703.
- the recording medium 707 is a non-volatile recording medium (non-temporary recording medium) that stores information non-temporarily.
- the recording medium 707 may be a temporary recording medium that holds information as a signal.
- the CPU 701 controls the overall operation of the computer 700 by operating an operating system (not shown). For example, the CPU 701 reads a program and data from a recording medium 707 mounted on the storage device 703 and writes the read program and data to the storage unit 702.
- the program is a program for causing the computer 700 to execute an operation of a flowchart shown in FIG.
- the CPU 701 follows the read program and based on the read data, the status notification signal receiving unit 101, the controller load monitoring unit 102, the status notification signal processing capability grasping unit 103, the network status monitoring unit 104, and the like shown in FIG. As the monitoring area recognition unit 105, the transmission interval calculation unit 106, and the transmission interval control signal transmission unit 107, various processes are executed.
- the CPU 701 may download a program and data to the storage unit 702 from an external computer (not shown) connected to a communication network (not shown).
- the storage unit 702 stores programs and data.
- the storage unit 702 may store the above-described load monitoring result 812, capability information 813, network state monitoring result 814, area division information 815, transmission interval information 816, state notification signal 804, and transmission interval control signal 805.
- the storage unit 702 also includes a status notification signal receiving unit 101, a controller load monitoring unit 102, a status notification signal processing capability grasping unit 103, a network status monitoring unit 104, a monitoring area recognition unit 105, a transmission interval calculation unit 106, and a transmission interval control. It may be included as part of the signal transmission unit 107.
- the recording medium 707 mounted on the storage device 703 is, for example, an optical disk, a flexible disk, a magnetic optical disk, an external hard disk, a semiconductor memory, or the like.
- the recording medium 707 stores the program so that the computer can read it.
- the recording medium 707 may store the load monitoring result 812, the capability information 813, the network status monitoring result 814, the area classification information 815, the transmission interval information 816, the status notification signal 804, and the transmission interval control signal 805.
- the storage device 703 reads programs and data from the recording medium 707 and writes programs and data to the recording medium 707.
- the storage device 703 may store programs and data read from the recording medium 707.
- the storage device 703 includes a status notification signal receiving unit 101, a controller load monitoring unit 102, a status notification signal processing capability grasping unit 103, a network status monitoring unit 104, a monitoring area recognition unit 105, a transmission interval calculation unit 106, and a transmission interval control signal transmission. It may be included as part of the unit 107.
- the input unit 704 receives an operation input by an operator and an input of information from the outside.
- Devices used for input operations are, for example, a mouse, a keyboard, a built-in key button, and a touch panel.
- the output unit 705 is realized by a display, for example.
- the output unit 705 is used, for example, for an input request to an operator by GUI (GRAPHICAL User Interface), an output presentation to the operator, or the like.
- GUI GRAAPHICAL User Interface
- the communication unit 706 implements an interface with the node 20 and an external device (not shown).
- the communication unit 706 may be included as part of the state notification signal receiving unit 101, the network state monitoring unit 104, and the transmission interval control signal transmitting unit 107.
- each component of the functional unit of the controller 100 shown in FIG. 2 is realized by the computer 700 having the hardware configuration shown in FIG.
- the means for realizing each unit included in the computer 700 is not limited to the above.
- the computer 700 may be realized by one physically coupled device, or may be realized by two or more physically separated devices connected by wire or wirelessly and by a plurality of these devices. .
- the CPU 701 may read and execute the program code stored in the recording medium 707.
- the CPU 701 may store the code of the program stored in the recording medium 707 in the storage unit 702, the storage device 703, or both. That is, the first embodiment of the present invention includes an embodiment of the recording medium 707 that stores a program (software) executed by the computer 700 (CPU 701) temporarily or non-temporarily.
- a storage medium that stores information non-temporarily is also referred to as a non-volatile storage medium.
- FIG. 7 is a flowchart showing the operation of the controller 100 according to the first embodiment of the present invention. Note that the processing according to this flowchart may be executed based on the above-described program control by the CPU 701. Further, the step name of the process is described by a symbol as in S1000.
- the controller 100 starts the operation of the flowchart shown in FIG. 7 when a predetermined time is reached.
- the predetermined time is, for example, a time at regular intervals.
- the predetermined times corresponding to “start 11”, “start 12”, and “start 13” shown in FIG. 7 may be the same or different.
- the “end” timing shown in FIG. 7 may be any start time of “start 11”, “start 12”, and “start 13”.
- the timing of “end” of the operation started from “start 13” may be the timing of starting the operations starting from “start 11” and “start 12” alternately.
- the network state monitoring unit 104 monitors the state of the network 40, and generates and transmits a network state monitoring result 814 based on the result of monitoring the state (step S100). S1010). Specifically, the network state monitoring unit 104 monitors the traffic inflow / outflow status and priority of the network 40. Here, the network state monitoring unit 104 predicts the state of the network 40 based on the result of monitoring the state, and transmits the result of predicting the state to the monitoring area recognition unit 105 as the network state monitoring result 814. Good.
- the monitoring area recognition unit 105 distinguishes and recognizes the monitoring area based on the network state monitoring result 814.
- the monitoring area recognition unit 105 generates area classification information 815 based on the result of recognizing the monitoring area, and transmits the generated area classification information 815 (step S1011). Thereafter, the controller 100 ends the process.
- the controller load monitoring unit 102 monitors the load of the controller 100, and generates and transmits a load monitoring result 812 based on the result of monitoring the load ( Step S1020). Specifically, the controller load monitoring unit 102 monitors loads such as a CPU usage rate and a memory usage rate of a server operating the controller 100. Here, the controller load monitoring unit 102 predicts the operating status of the controller 100 based on the result of monitoring the load, and the status notification signal processing capability grasping unit 103 uses the result of predicting the operating status as the load monitoring result 812. You may send it.
- the status notification signal processing capability grasping unit 103 grasps the processing capability of the status notification signal 804 based on the load monitoring result 812, and transmits the result of grasping the processing capability as capability information 813 (step S1021). For example, the status notification signal processing capability grasping unit 103 uses the status notification signal 804 to process the status notification signal 804 such as "the CPU usage rate can be 10% and the memory usage rate 10% can be used to process the status notification signal 804". Know the resources of the controller 100 that can be used. Thereafter, the controller 100 ends the process.
- the transmission interval calculation unit 106 is based on the area classification information 815 received from the monitoring area recognition unit 105 and the capability information 813 received from the status notification signal processing capability grasping unit 103. Thus, the transmission interval of each area segment is calculated.
- the transmission interval calculation unit 106 transmits the calculated transmission interval value as the transmission interval information 816 (step S1030).
- FIG. 8 is a diagram illustrating an example of a technique for calculating a transmission interval according to the first embodiment of the present invention.
- the controller 100 is monitoring A nodes 20 in one area segment and B nodes 20 in another area segment.
- the controller 100 distinguishes the area sections based on the number of nodes 20, but the controller 100 may distinguish the area sections based on the number of links.
- the number of nodes A is the number of nodes in the area section that shortens the transmission interval.
- the node number B is a number obtained by subtracting the node number A from the total number of nodes managed by the controller 100.
- the transmission interval X is the signal transmission interval of the area division with the node number A
- the transmission interval Y is the signal transmission interval of the area division with the node number B. Therefore, the transmission interval X is shorter than the transmission interval Y (X> Y). In other words, this assumes that the situation of the area division of the number A of nodes is intensively monitored.
- FIG. 8 shows the above-mentioned assumption, the sending interval X on the x-axis and the sending interval Y on the y-axis.
- P ⁇ (A / X + B / Y)
- the x and y values of the coordinates of the intersection with the straight line corresponding to ax + b) are determined.
- the values of x and y are a transmission interval X and a transmission interval Y, respectively.
- the number of area divisions may be three or more.
- the graph to be used is a three-dimensional graph or more.
- the transmission interval control signal transmission unit 107 includes transmission interval information 816 including transmission interval information 816 for the nodes 20 of each area segment based on the transmission interval information 816 received from the transmission interval calculation unit 106.
- a signal 805 is transmitted (step S1031). Thereafter, the controller 100 ends the process.
- the first effect of the first embodiment of the present invention described above is that desired reliability can be obtained for the entire network 40.
- the reason is that the transmission interval calculation unit 106 calculates the transmission interval based on the capability information 813 generated by the status notification signal processing capability grasping unit 103 and the area classification information 815 generated by the monitoring area recognition unit 105. It is.
- the controller 100 can improve the reliability of the network 40 because the controller 100 can shorten the transmission interval of the area segment to be focused on while considering the processing capability of the controller 100.
- the controller further grasps the link status from the status of the status notification signal 804, recognizes the network status in more detail, and divides the monitoring area into area sections. By doing so, the controller according to the second embodiment of the present invention sets the transmission interval of each area section while more appropriately considering the processing capability of the controller itself.
- FIG. 9 is a block diagram showing the configuration of the controller 110 according to the second embodiment of the present invention.
- the controller 110 is one specific example of the controller 10 shown in FIG.
- Each component shown in FIG. 9 may be a hardware unit circuit, a module included in a microchip, or a component divided into functional units of a computer device.
- the case where the components shown in FIG. 9 are components divided into functional units of the computer apparatus will be described as an example.
- the controller 110 shown in FIG. 9 may be mounted on a server and made available via a network. Further, each component of the controller 110 shown in FIG. 9 may be distributed and installed on the network to be usable.
- the state notification signal receiving unit 111 receives the state notification signal 804 from the node, and transmits the received information to the link state grasping unit 112 as the state notification signal information 827.
- the link state grasping unit 112 receives the state notification signal information 827 from the state notification signal receiving unit 111.
- the link state grasping unit 112 grasps the state of each link based on the state notification signal information 827.
- the link state grasping unit 112 transmits the grasped state of each link to the monitoring area recognizing unit 114 as link state information 828.
- the network state monitoring unit 113 monitors the state of the network 40 and transmits the result of monitoring the state to the monitoring area recognition unit 114 as the network state monitoring result 814.
- the monitoring area recognition unit 114 receives the network state monitoring result 814 from the network state monitoring unit 113 and receives the link state information 828 from the link state grasping unit 112.
- the monitoring area recognition unit 114 divides the monitoring area into area sections based on the network state monitoring result 814 and the link state information 828.
- the monitoring area recognizing unit 114 transmits the result of dividing the monitoring area into area divisions as area division information 815 to the transmission interval calculation unit 117.
- the controller load monitoring unit 115 monitors the load of the controller 110 and transmits the result of monitoring the load to the state notification signal processing capability grasping unit 116 as a load monitoring result 812.
- the status notification signal processing capability grasping unit 116 receives the load monitoring result 812 from the controller load monitoring unit 115. Based on the load monitoring result 812, the state notification signal processing capability grasping unit 116 grasps the ability to process the state notification signal 804 received by the controller 110. The status notification signal processing capability grasping unit 116 transmits the result of grasping the capability as capability information 813 to the transmission interval calculating unit 117.
- the transmission interval calculation unit 117 receives the above-described capability information 813 from the status notification signal processing capability grasping unit 116. Further, the transmission interval calculation unit 117 receives the above-described area division information 815 from the monitoring area recognition unit 114. The transmission interval calculation unit 117 calculates a transmission interval for each area segment based on the capability information 813 and the area segment information 815. The transmission interval calculation unit 117 transmits the calculated transmission interval to the transmission interval control signal transmission unit 118 as transmission interval information 816.
- the transmission interval control signal transmission unit 118 receives the transmission interval information 816 from the transmission interval calculation unit 117. Based on the transmission interval information 816, the transmission interval control signal transmission unit 118 transmits a transmission interval control signal 805 including transmission interval information 816 corresponding to the area section for each node 20 included in each area section.
- the controller 110 may be realized by the computer 700 shown in FIG.
- the CPU 701 follows the read program and based on the read data, the status notification signal receiving unit 111, the link status grasping unit 112, the network status monitoring unit 113, the monitoring area recognition unit 114, the controller load shown in FIG.
- the monitoring unit 115, the status notification signal processing capability grasping unit 116, the transmission interval calculation unit 117, and the transmission interval control signal transmission unit 118 various processes are executed.
- the program is a program for causing the computer 700 to execute an operation of a flowchart shown in FIG.
- the storage unit 702 may further store state notification signal information 827 and link state information 828.
- the storage unit 702 includes a state notification signal reception unit 111, a link state grasping unit 112, a network state monitoring unit 113, a monitoring area recognition unit 114, a controller load monitoring unit 115, a state notification signal processing capability grasping unit 116, and a transmission interval calculation unit 117.
- the transmission interval control signal transmission unit 118 may also be included.
- the storage device 703 may further store status notification signal information 827 and link status information 828.
- the storage device 703 further includes a state notification signal receiving unit 111, a link state grasping unit 112, a network state monitoring unit 113, a monitoring area recognition unit 114, a controller load monitoring unit 115, a state notification signal processing capability grasping unit 116, and a transmission interval calculation unit. 117 and part of the transmission interval control signal transmission unit 118 may be included.
- the communication unit 706 may be included as part of the state notification signal receiving unit 111, the network state monitoring unit 113, and the transmission interval control signal transmitting unit 118.
- the node 20 may be the node 200 shown in FIG. 4, the node 210 shown in FIG.
- FIG. 10 is a flowchart showing the operation of the controller 110 according to the second embodiment of the present invention. Note that the processing according to this flowchart may be executed based on the above-described program control by the CPU 701. Further, the step name of the process is described by a symbol as in S1000.
- the controller 110 starts the operation of the flowchart shown in FIG. 10 when a predetermined time is reached.
- the predetermined time is, for example, a time at regular intervals.
- the predetermined times corresponding to “start 21”, “start 22”, “start 23”, and “start 24” shown in FIG. 10 may be the same or different.
- the “end” timing shown in FIG. 7 may be any start time of “start 21”, “start 22”, “start 23”, and “start 24”.
- the “end” timing of the operation from “start 21” is the start time of “start 22”
- the “end” timing of the operation from “start 22” is the start time of “start 23”
- start time of “start 24” may be used as the timing of “end” of the operation from.
- the state notification signal reception unit 111 receives the state notification signal 804 from each node 20 (step S2010).
- the link state grasping unit 112 grasps the state of each link of the network 40 based on the information of the state notification signal 804, and transmits the state notification signal information 827 based on the result of grasping the state (step S2011). ). Thereafter, the controller 110 ends the process. Specifically, for example, when an OAM signal is used as the status monitoring signal 803 of each link, in step S2010, each node 20 uses the status notification signal 804 including information such as packet loss and delay between links as a controller. 110. The link state grasping unit 112 of the controller 110 grasps the state of each link based on the content of the state notification signal 804.
- the network state monitoring unit 113 monitors the state of the network 40 and transmits the network state monitoring result 814 (step S2020).
- the network state monitoring means may be the same as the operation of the network state monitoring unit 104 in the first embodiment of the present invention, for example.
- the monitoring area recognition unit 114 distinguishes and recognizes the monitoring area based on the network state monitoring result 814 and the state of each link.
- the monitoring area recognition unit 114 generates area classification information 815 based on the result of distinguishing and recognizing the monitoring area, and transmits the generated area classification information 815 (step S2021). Thereafter, the controller 110 ends the process.
- the second embodiment of the present invention is different from the first embodiment of the present invention in that the monitoring area is distinguished based not only on the state of the network 40 but also on the state of each link. Accordingly, for example, the monitoring area recognizing unit 114 further sets area divisions individually for the link portion where the packet loss is large, and notifies the transmission interval calculation unit 117 of the area divisions. The transmission interval calculation unit 117 calculates a shorter transmission interval of the area section.
- the controller load monitoring unit 115 monitors the load of the controller 110, and generates and transmits a load monitoring result 812 based on the result of monitoring the load ( Step S2030).
- the load monitoring means of the controller 110 may be the same as the operation of the controller load monitoring unit 102 in the first embodiment of the present invention, for example.
- the status notification signal processing capability grasping unit 116 grasps the processing capability of the controller 110 with respect to the status notification signal 804 from the monitoring state of the controller load, and transmits capability information 813 based on the result (step S2031).
- the processing capability grasping means may be the same as the operation of the state notification signal processing ability grasping unit 103 in the first embodiment of the present invention.
- the transmission interval calculation unit 117 is based on the area classification information 815 received from the monitoring area recognition unit 114 and the capability information 813 received from the status notification signal processing capability grasping unit 116. Thus, the transmission interval of each area segment is calculated.
- the transmission interval calculation unit 117 transmits the calculated transmission interval as transmission interval information 816 (step S2040).
- the calculation method of the sending interval may be the same as that of the first embodiment of the present invention.
- the transmission interval control signal transmission unit 118 transmits a transmission interval control signal 805 including the transmission interval to the node 20 in each area segment (step). S2041). Thereafter, the controller 110 ends the process.
- the effect of the second embodiment of the present invention described above is that it is possible to set the transmission interval of each area section more flexibly.
- the link state grasping unit 112 grasps the link state from the state of the state notification signal 804.
- the monitoring area recognizing unit 114 distinguishes the monitoring areas based on the network state monitoring result 814 and the state of each link.
- FIG. 11 is a block diagram showing a configuration of a communication control system 130 according to the third embodiment of the present invention.
- the communication control system 130 includes a state notification signal processing capability grasping unit 131, a monitoring area recognizing unit 132, and a transmission interval control signal transmitting unit 133.
- the state notification signal processing capability grasping unit 131 grasps the ability to process the state notification signal 804 based on the load state of the control device.
- the control device may control a node included in the network and receive the content of a control signal transmitted / received between the nodes as the state notification signal 804.
- the status notification signal processing capability grasping unit 131 includes, for example, the controller load monitoring unit 102 and the status notification signal processing capability grasping unit 103 shown in FIG.
- the state notification signal processing capability grasping unit 131 may include the controller load monitoring unit 115 and the state notification signal processing ability grasping unit 116 shown in FIG.
- the monitoring area recognizing unit 132 determines an area classification based on network state information related to communication on the network.
- the area section includes an arbitrary number of nodes.
- the monitoring area recognition unit 132 includes, for example, the network state monitoring unit 104 and the monitoring area recognition unit 105 shown in FIG. Alternatively, the monitoring area recognition unit 132 may include the state notification signal reception unit 111, the link state grasping unit 112, the network state monitoring unit 113, and the monitoring area recognition unit 114 illustrated in FIG.
- the transmission interval control signal transmission unit 133 calculates the transmission interval of the state notification signal 804 in the node based on the capability grasped by the state notification signal processing capability grasping unit 131 for each area division.
- the transmission interval control signal transmission unit 133 transmits a transmission interval (for example, a transmission interval control signal 805 including the transmission interval information 816) to the nodes included in the area section.
- the transmission interval control signal transmission unit 133 includes, for example, a transmission interval calculation unit 106 and a transmission interval control signal transmission unit 107 shown in FIG.
- the transmission interval control signal transmission unit 133 may include a transmission interval calculation unit 117 and a transmission interval control signal transmission unit 118 shown in FIG.
- the communication control system 130 may be realized by the computer 700 shown in FIG.
- the CPU 701 further performs various operations as the status notification signal processing capability grasping unit 131, the monitoring area recognition unit 132, and the transmission interval control signal transmission unit 133 shown in FIG. Execute the process.
- the program is a program for causing the computer 700 to execute the operations of the flowcharts shown in FIGS. 7 and 10, for example.
- the third embodiment of the present invention has the same effect as the first embodiment or the second embodiment of the present invention.
- FIG. 12 is a diagram illustrating an example of a communication control system 140 that is a modification of the third embodiment of the present invention.
- the communication control system 140 includes a storage device 143, a status notification signal processing capability grasping unit 131, a monitoring area recognition unit 132, and a transmission interval control signal transmission unit 133 shown in FIG.
- the storage device 143, the status notification signal processing capability grasping unit 131, the monitoring area recognizing unit 132, and the transmission interval control signal transmitting unit 133 are connected via a network 149.
- any combination of the storage device 143, the status notification signal processing capability grasping unit 131, the monitoring area recognizing unit 132, and the transmission interval control signal transmitting unit 133 can be performed by a single computer 700 as shown in FIG. Good.
- any one of the storage device 143, the status notification signal processing capability grasping unit 131, the monitoring area recognizing unit 132, and the transmission interval control signal transmitting unit 133 may be directly connected without a network. Good. That is, the storage device 143, the status notification signal processing capability grasping unit 131, the monitoring area recognition unit 132, and the transmission interval control signal transmission unit 133 may be arbitrarily connected via the network 149.
- the network 149 may be a part of the network 40 shown in FIG.
- the status notification signal processing capability grasping unit 131 transmits capability information 813 to the transmission interval control signal transmitting unit 133 via the network 149.
- the state information 828 may be arbitrarily stored.
- the effect of the modification of the third embodiment of the present invention described above is that the communication control system 140 can be flexibly realized.
- the reason is that the storage device 143, the status notification signal processing capability grasping unit 131, the monitoring area recognizing unit 132, and the transmission interval control signal transmitting unit 133 are arbitrarily connected via the network 149.
- Each component described in each of the above embodiments does not necessarily need to be an independent entity.
- a plurality of arbitrary components may be realized as one module.
- any one of the constituent elements may be realized by a plurality of modules.
- any one of the constituent elements may be any other one of the constituent elements.
- any one part of the constituent elements may overlap with any other part of the constituent elements.
- Each component in each embodiment described above and a module that realizes each component may be realized by hardware if necessary, if necessary.
- Each component and a module that realizes each component may be realized by a computer and a program.
- Each component and a module that realizes each component may be realized by a mixture of a hardware module, a computer, and a program.
- the program is recorded on a computer-readable non-transitory recording medium such as a magnetic disk or a semiconductor memory, and provided to the computer.
- the program is read from the non-transitory recording medium by the computer when the computer is started up.
- the read program causes the computer to function as a component in each of the above-described embodiments by controlling the operation of the computer.
- a plurality of operations are not limited to being executed at different timings. For example, other operations may occur during execution of an operation.
- the execution timing of one operation and another operation may partially or entirely overlap.
Abstract
Description
図1は、本発明の第1の実施形態におけるネットワーク構成の一例を示す図である。図1に示すように、ネットワーク40は、コントローラ(通信制御システムとも呼ばれる)10および複数のノード20で構成されている。尚、図1に示す例に係わらず、ネットワーク40は、任意の数のノード20を含んでよい。
ノード20間にはリンクがある。そして、各ノード20は、隣接ノードと状態監視信号803のやりとりを行う。ここで、あるノード20における隣接ノードは、そのノード20自身と直接のリンクを有する、他のノード20である。状態監視信号803は、例えば、Keep AliveやLLDP、OAM(Operation Administration and Maintenance)などのメッセージである。ノード20は、隣接ノードから受信した状態監視信号803の内容をコントローラ10に状態通知信号804として送出する。
コントローラ10は、各ノード20と接続されている。そして、コントローラ10は、ノード20のそれぞれから状態通知信号804を受信する。コントローラ10は、コントローラ負荷およびネットワーク状態に基づいて、送出間隔を算出し、算出した送出間隔を含む送出間隔制御信号805を各ノード20に送出する。ここで、送出間隔は、ノード20において状態通知信号804を送信する間隔の、下限値を示す情報である。
図2は、本発明の第1の実施形態に係るコントローラ100の構成を示すブロック図である。コントローラ100は、図1に示すコントローラ10の具体例のひとつである。
図4は、本発明の第1の実施形態における、ノード200の構成を示すブロック図である。ノード200は、図1に示すノード20の具体例のひとつである。
次に、本発明の第2の実施形態について図面を参照して詳細に説明する。以下、本発明の第2の実施形態の説明が不明確にならない範囲で、前述の説明と重複する内容については説明を省略する。
図9に示すように、コントローラ110は、状態通知信号受信部111、リンク状態把握部112、ネットワーク状態監視部113、監視エリア認識部114、コントローラ負荷監視部115、状態通知信号処理能力把握部116、送出間隔算出部117および送出間隔制御信号送信部118を含む。
次に、本発明の第3の実施形態について図面を参照して詳細に説明する。以下、本発明の第3の実施形態の説明が不明確にならない範囲で、前述の説明と重複する内容については説明を省略する。
図12は、本発明の第3の実施形態の変形例である通信制御システム140の一例を示す図である。図12に示すように、通信制御システム140は、記憶装置143と、図11に示す状態通知信号処理能力把握部131、監視エリア認識部132および送出間隔制御信号送信部133と、を含む。記憶装置143と、状態通知信号処理能力把握部131と、監視エリア認識部132と、送出間隔制御信号送信部133とは、ネットワーク149を介して接続されている。尚、記憶装置143と、状態通知信号処理能力把握部131と、監視エリア認識部132と、送出間隔制御信号送信部133との任意の組み合わせは、1台の図6に示すようなコンピュータ700でもよい。また、記憶装置143と、状態通知信号処理能力把握部131と、監視エリア認識部132と、送出間隔制御信号送信部133との任意のいずれかどうしは、ネットワークを介することなく直接接続されてもよい。即ち、記憶装置143と、状態通知信号処理能力把握部131と、監視エリア認識部132と、送出間隔制御信号送信部133とは、任意に、ネットワーク149を介して接続されてよい。
状態通知信号処理能力把握部131は、ネットワーク149を介して、能力情報813を送出間隔制御信号送信部133へ送信する。
監視エリア認識部132は、ネットワーク149を介して、エリア区分情報815を送出間隔制御信号送信部133へ送信する。
送出間隔制御信号送信部133は、ネットワーク149を介して、状態通知信号処理能力把握部131から送信される能力情報813と、監視エリア認識部132から送信されるエリア区分情報815と、を受信する。
記憶装置143は、前述の負荷監視結果812、能力情報813、ネットワーク状態監視結果814、エリア区分情報815、送出間隔情報816、状態通知信号804、送出間隔制御信号805、状態通知信号情報827およびリンク状態情報828を、任意に記憶してよい。
20 ノード
40 ネットワーク
100 コントローラ
101 状態通知信号受信部
102 コントローラ負荷監視部
103 状態通知信号処理能力把握部
104 ネットワーク状態監視部
105 監視エリア認識部
106 送出間隔算出部
107 送出間隔制御信号送信部
110 コントローラ
111 状態通知信号受信部
112 リンク状態把握部
113 ネットワーク状態監視部
114 監視エリア認識部
115 コントローラ負荷監視部
116 状態通知信号処理能力把握部
117 送出間隔算出部
118 送出間隔制御信号送信部
130 通信制御システム
131 状態通知信号処理能力把握部
132 監視エリア認識部
133 送出間隔制御信号送信部
140 通信制御システム
143 記憶装置
149 ネットワーク
200 ノード
201 状態監視信号受信部
202 状態通知信号送信部
203 送出間隔制御信号受信部
204 状態監視信号送信部
210 ノード
211 状態監視信号受信部
212 状態通知信号送信部
213 送出間隔制御信号受信部
214 状態監視信号送信部
700 コンピュータ
701 CPU
702 記憶部
703 記憶装置
704 入力部
705 出力部
706 通信部
707 記録媒体
803 状態監視信号
804 状態通知信号
805 送出間隔制御信号
812 負荷監視結果
813 能力情報
814 ネットワーク状態監視結果
815 エリア区分情報
816 送出間隔情報
827 状態通知信号情報
828 リンク状態情報
Claims (10)
- ネットワークに含まれるノードを制御して前記ノードの間で送受信される制御信号の内容を状態通知信号として受信する制御装置の負荷状態に基づいて、前記状態通知信号を処理するための能力を把握する状態通知信号処理能力把握手段と、
前記ネットワーク上の通信に係るネットワーク状態情報に基づいて、任意の数の前記ノードを含むエリア区分を決定する監視エリア認識手段と、
前記能力に基づいて、前記エリア区分ごとに、前記ノードにおける前記状態通知信号の送出間隔を算出し、前記エリア区分に含まれる前記ノードに前記送出間隔を送信する送出間隔制御信号送信手段と、を含む
通信制御システム。 - 前記送出間隔制御信号送信手段は、前記エリア区分の各々に含まれる前記ノードの数を当該エリア区分に対応する前記送出間隔で除した値を合計した値に所定の係数を乗じた値が前記能力と等しいという関係と、前記エリア区分の間の前記送出間隔の大小関係の条件に基づいて、前記送出間隔を算出する
請求項1記載の通信制御システム。 - 前記ネットワーク状態情報は、前記ネットワークのトラフィックの流出入状況および優先度のいずれかを少なくとも含む
請求項1または2記載の通信制御システム。 - 前記監視エリア認識手段は、前記状態通知信号から得られる前記ネットワークのリンクの状態に係るリンク状態情報にさらに基づいて、前記エリア区分を決定する
請求項1乃至3のいずれか1項に記載の通信制御システム。 - 前記リンク状態情報は、前記リンクのパケットロスの数を少なくとも含む
請求項4記載の通信制御システム。 - 前記送出間隔を受信し、受信した前記送出間隔に基づいて、前記状態通知信号を送信する前記ノードを含む
請求項1乃至5のいずれか1項に記載の通信制御システム。 - コンピュータが、
ネットワークに含まれるノードを制御して前記ノードの間で送受信される制御信号の内容を状態通知信号として受信する制御装置の負荷状態に基づいて、前記状態通知信号を処理するための能力を把握し、
前記ネットワーク上の通信に係るネットワーク状態情報に基づいて、任意の数の前記ノードを含むエリア区分を決定し、
前記能力に基づいて、前記エリア区分ごとに、前記ノードにおける前記状態通知信号の送出間隔を算出し、
前記エリア区分に含まれる前記ノードに前記送出間隔を送信する
通信制御方法。 - 前記状態通知信号から得られる前記ネットワークのリンクの状態に係るリンク状態情報にさらに基づいて、前記エリア区分を決定する
請求項7記載の通信制御方法。 - ネットワークに含まれるノードを制御して前記ノードの間で送受信される制御信号の内容を状態通知信号として受信する制御装置の負荷状態に基づいて、前記状態通知信号を処理するための能力を把握し、
前記ネットワーク上の通信に係るネットワーク状態情報に基づいて、任意の数の前記ノードを含むエリア区分を決定し、
前記能力に基づいて、前記エリア区分ごとに、前記ノードにおける前記状態通知信号の送出間隔を算出し、
前記エリア区分に含まれる前記ノードに前記送出間隔を送信する処理をコンピュータに実行させる
プログラムを格納する、コンピュータが読み取り可能な記録媒体。 - 前記状態通知信号から得られる前記ネットワークのリンクの状態に係るリンク状態情報にさらに基づいて、前記エリア区分を決定する処理をコンピュータに実行させる
請求項9記載のプログラムを格納する、コンピュータが読み取り可能な記録媒体。
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US10462016B2 (en) | 2019-10-29 |
RU2679555C1 (ru) | 2019-02-11 |
EP3249859A4 (en) | 2018-07-25 |
US20170353360A1 (en) | 2017-12-07 |
EP3249859B1 (en) | 2020-02-19 |
EP3249859A1 (en) | 2017-11-29 |
JPWO2016117303A1 (ja) | 2017-10-26 |
JP6683135B2 (ja) | 2020-04-15 |
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