JP2011055231A - Network management system and network management method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a network management system capable of reducing processing loads of network management. <P>SOLUTION: A group management device 300 is provided with: a group management information generation part 301 which generates network group information which is determination information for group formation; an equipment information collection part 302 which collects equipment information and adjacent relation information from a node 400 in a group; and a group constitution management part 303 which stores and manages the equipment information and the adjacent relation information of the node 400, wherein the node 400 is provided with: a management information analysis part 401 which analyzes the network group information; a group selection part 402 which selects a group to which a self-node belongs; a participation and secession request transmission part 405 which transmits participation notification to the group management device 300 of the selected group; and an equipment information control part 407 which notifies the equipment information and the adjacent relation information according to a request from the group management device 300. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a network management system that manages networks in a hierarchical manner.

  The number of network devices has increased dramatically with the increase in the size of the network, and since processing from a large number of network devices is handled, management with a single network management device increases processing load and speeds up operation management. It has become difficult. Therefore, a plurality of node devices connected to the network are divided into groups, and a network monitoring server is set up for each group. The load is adjusted between each network monitoring server, and management information is shared to process each server. A technique for reducing the load is disclosed in Patent Document 1 below.

  When a plurality of communication terminals connected to the network are managed by dividing them into groups, the communication terminals form a group and send a response message within a predetermined time after the communication terminal broadcasts an interrogation message. Japanese Patent Application Laid-Open No. 2004-151561 discloses a technique for autonomously forming a group with a large number of unspecified communication terminals and realizing intra-group communication.

  In addition, when managing a plurality of communication terminals connected to the network in groups, the communication terminal transmits a terminal information identification code when joining the group, and the received communication terminal joins the group. A technique for realizing intra-group communication by managing communication terminals using an identification code and disclosing intra-group communication is disclosed in Patent Document 3 below.

  In addition, as a network division method, in a tree-type network topology, a management server that manages a group is connected to a communication device installed at the top of the tree, and the management server manages communication devices below the connected communication device. A technique for realizing network division management is disclosed in Patent Document 4 below.

JP 2001-144761 A JP 2002-111679 A JP 2005-045540 A JP 2008-167321 A

  However, according to the technique of the above-described conventional Patent Document 1, since information on node devices is shared between the monitoring servers, and monitoring servers corresponding to the node devices are allocated while adjusting the load between the monitoring servers, There was a problem that functionalization was necessary. Further, in order to share management information, it is necessary to transfer information to a monitoring server in another group every time a node device is added or deleted. For this reason, there is a problem of wasting network bandwidth.

  Further, according to the technique of the above-described conventional Patent Document 2, since the communication terminal does not manage the group status, it is difficult to immediately monitor the inside of the group following the network configuration, status change, and event occurrence. There was a problem that there was. Further, since the communication terminals form a group, it is necessary for the communication terminal to manage the information of the transmission source terminal, and there is a problem that the processing load of the communication terminal increases.

  Moreover, according to the technique of the above-mentioned conventional Patent Document 3, in order for communication terminals to autonomously group networks and realize intra-group communication, it is necessary for the communication terminals to hold the identification codes of the communication terminals in the group. . Therefore, similarly to Patent Document 2, there is a problem that the processing load on the communication terminal increases.

  Further, according to the technique of the above-described conventional Patent Document 4, it is necessary for a network designer to manually set a vertex of a specific tree. For this reason, there is a problem that the work load on the network designer increases. Further, there is a problem that the network configuration capable of grouping networks is limited to a tree-type network topology.

  The present invention has been made in view of the above, and an object thereof is to obtain a network management system capable of reducing the processing load of network management.

  In order to solve the above-described problems and achieve the object, the present invention is configured such that a group management apparatus monitors nodes in a group, and an upper network management apparatus that operates and manages the entire network manages nodes via the group management apparatus. A network management system for managing network group information in which the group management device can describe information on its own device, the number of hops, and information on a transfer source node, which is determination information for forming a group for a node Group management information generating means for generating and transmitting the management information, and a participation notification for notifying participation in the group managed by the device itself, the management target node is identified based on the participation notification, and the management is performed. Device information collection means for collecting device information and adjacency information managed by the target node, and the device information collection means Group configuration management means for storing and managing device information and adjacency information, and the node analyzes management information analysis means for analyzing received network group information, and based on an analysis result by the management information analysis means A group selection unit that selects a group under the management of the group management device with a small number of hops, a participation / removal request transmission unit that transmits a notification of participation in the group selected by the group selection unit, and the received network group information Manages the adjacent relationship analysis means for analyzing the adjacent relationship of the own node from the information of the transfer source node described, the device information of the own node, the formed group information, and the adjacent relationship information which is the analysis result of the adjacent relationship analysis means. In response to an acquisition request from the information management means and the group management device. A device information control unit for notifying the device information and adjacency information, the number of hops to a management information transfer means for transferring the transport network group information rewriting the information of the source node to the neighboring node, comprising: a.

  According to the present invention, it is possible to reduce the processing load of a device that manages nodes in a network.

FIG. 1 is a diagram illustrating a configuration example of apparatuses that configure a network. FIG. 2 is a diagram illustrating a configuration example of a network. FIG. 3 is a sequence diagram showing the operation of each apparatus. FIG. 4 is a diagram illustrating a configuration example of network group information. FIG. 5 is a diagram illustrating a configuration example of network group information. FIG. 6 is a diagram illustrating a configuration example of a network. FIG. 7 is a diagram illustrating a configuration example of network group information. FIG. 8 is a diagram illustrating a configuration example of a network. FIG. 9 is a diagram illustrating a configuration example of network group information. FIG. 10 is a diagram illustrating a configuration example of a network. FIG. 11 is a diagram illustrating a configuration example of network group information. FIG. 12 is a sequence diagram showing the operation of each device. FIG. 13 is a diagram illustrating a configuration example of a network. FIG. 14 is a sequence diagram showing the operation of each device. FIG. 15 is a diagram illustrating a configuration example of a network. FIG. 16 is a diagram illustrating a configuration example of network group information. FIG. 17 is a sequence diagram showing the operation of each device. FIG. 18 is a sequence diagram showing the operation of each device. FIG. 19 is a diagram illustrating a configuration example of nodes configuring a network. FIG. 20 is a diagram illustrating a configuration example of a network. FIG. 21 is a sequence diagram showing the operation of each device. FIG. 22 is a diagram illustrating a configuration example of network group information.

  Embodiments of a network management system according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
In this embodiment, the node autonomously forms a group, and the group management apparatus manages the nodes under the formed group. Describes the operation of realizing layered management of a network by selecting a group management device adjacent to the node and forming a group by analyzing the number of hops contained in the network group information. To do.

  FIG. 1 is a diagram illustrating a configuration example of each device of a network that realizes hierarchical management. The network includes a host network management device 100, a management network (DCN: Data Communication Network) 200, a group management device 300, and a node 400. The host network management device 100 is a host network management device that manages the entire network. The host network management device 100 controls the group management device 300 via the management network 200. The management network 200 is a management network. The group management apparatus 300 manages the node 400 in a hierarchical network. The node 400 is a terminal that forms a hierarchical network.

  Next, the configuration of the group management apparatus 300 will be described. The group management apparatus 300 includes a group management information generation unit 301, a device information collection unit 302, a group configuration management unit 303, a monitoring group information transmission unit 304, a control request reception unit 305, and a monitoring control unit 306. Prepare.

  The group management information generation unit 301 generates and transmits network group information, which is information on a group management apparatus, which is determination information for forming a group, to the node 400. The device information collection unit 302 collects device information and adjacency information from the nodes 400 in the group. The group configuration management unit 303 saves and manages the collected information on the node 400 and information on the adjacent relationship indicating the configuration of the network group. The monitoring group information transmission unit 304 notifies the monitoring target group information to the higher-level network management apparatus 100 that operates and manages the entire network. The control request receiving unit 305 receives a control (setting) request for the node 400 in the group transmitted by the higher-level network management apparatus 100. The monitoring control unit 306 performs control to reflect the control information requested from the higher-level network management apparatus 100 to the nodes 400 in the group.

  Next, the configuration of the node 400 will be described. The node 400 includes a management information analysis unit 401, a group selection unit 402, a management information transfer unit 403, an adjacent relationship analysis unit 404, a participation / removal request transmission unit 405, a group information management unit 406, and a device information control unit. 407, a device information management unit 408, and a group management device state confirmation unit 409.

  The management information analysis unit 401 analyzes the network group information transmitted from the group management apparatus 300 in order to select an appropriate group when forming a group autonomously. When the group selection unit 402 receives network group information from a plurality of group management apparatuses 300, the group selection unit 402 selects an appropriate group from the plurality of groups. The management information transfer unit 403 transfers the received network group information to another node 400. When receiving the network group information, the adjacency analysis unit 404 analyzes the adjacency relationship of the own node as to which information is transferred from which node 400. The participation / removal request transmission unit 405 requests the group management apparatus 300 to participate in or leave the managed group. The group information management unit 406 manages the information of the group management device 300 that manages the formed group, the distance (the number of hops) from the group management device 300, and the group information that is configured. Based on the acquisition request from the group management apparatus 300, the device information control unit 407 notifies the device information managed by the own node and the adjacent relationship. The device information management unit 408 manages device information of the own node. The group management device status confirmation unit 409 confirms the status and response time with respect to the group management device 300.

  Subsequently, an operation in which the node 400 autonomously forms a group will be described. FIG. 2 is a diagram illustrating a configuration example of a network. The management network 200 includes one host network management device 100, two group management devices 300 (hereinafter referred to as group management device 1 and group management device 2, respectively), and six nodes 400 (hereinafter referred to as respective, respectively). , Node A, Node B, Node C, Node D, Node E, and Node F) are connected. FIG. 3 is a sequence diagram showing the operation of each device in the network shown in FIG. Since the operations related to the group management device 1 and the group management device 2 are the same, the operation related to the group management device 1 will be described in detail. In the network of FIG. 2, the group management device 1 manages the nodes belonging to the group 1, and the group management device 2 manages the nodes belonging to the group 2.

  First, in the group management information generation unit 301, the group management device 1 generates network group information storing the information of its own device (step S100) and transmits it to the adjacent node A (step S101).

  FIG. 4 is a diagram illustrating a configuration example of network group information transmitted from the group management apparatus 1 to the node A. The network group information includes a group management device, the number of hops, and a transmission source node. The group management device indicates a generation source of network group information. The number of hops indicates the number of hops from the transmission from the group management device to the node that received the information. The transmission source node indicates an adjacent node that has directly transmitted the information. The node to which the information is transferred indicates the information of the own node. The group management device 2 also transmits similar network group information.

  The node A receives the network group information from the group management apparatus 1 and analyzes the network group information in the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node) described in the network group information shown in FIG.

  Next, in the node A, the group selection unit 402 selects an appropriate group to which the node belongs, based on the group management device and hop count information extracted by the management information analysis unit 401 (step S103). When network group information is received from a plurality of group management devices, the group selection unit 402 of the node A analyzes the number of hops of the received network group information, and transmits the network group information having a smaller number of hops. The subordinate group is selected (step S103) and stored in the group information management unit 406 (step S104). The group information management unit 406 also manages the adjacency relationship analyzed by the adjacency analysis unit 404 from the transmission source node of the network group information.

  On the other hand, when the network group information has not been received from another group management apparatus, the node A does not perform the comparison process and temporarily stores the network group information in the group information management unit 406. Thereafter, when other network group information is received, it is compared with the stored information. If network group information is not received from another group management apparatus even after waiting for a certain period of time, a group is selected based on the stored network group information. The standby time can be arbitrarily specified. Here, after the standby time has elapsed, network group information is not received from another group management apparatus, and therefore, in node A, the group selection unit 402 selects group 1.

  Next, in the node A, the management information transfer unit 403 rewrites the transmission source node of the network group information to the own node, and further adds (+1) the hop number of the own node to the adjacent node (node B , C) (step S105).

  The node B that has received the transferred network group information, like the node A, analyzes the network group information in the management information analysis unit 401, and the group management device and hop number information extracted by the management information analysis unit 401 Based on the above, the group selection unit 402 selects a group, and stores the selected network group information in the group information management unit 406 (steps S102 to S104). As with the node A, the node B also selects the group 1 since the network group information is not received from other group management apparatuses after the standby time has elapsed. The group information management unit 406 also manages the adjacent relationship analyzed by the adjacent relationship analysis unit 404 from the transmission source information of the network group information. Thereafter, the node B rewrites the contents of the network group information and transfers it to the node D (step S105).

  The same applies to the operation relating to the group management apparatus 2. First, the group management device 2 uses the group management information generation unit 301 to generate network group information (see FIG. 4) in which the information of the device itself is stored (step S100), and transmits it to the adjacent node E (step S101). . Thereafter, the same processing as that of the node A is performed, and the node E selects the group 2 (step S103), rewrites the contents of the network group information, and transfers it to the nodes C and F (step S105). The same applies to the node F. The same processing as that of the node B is performed, and the node F selects the group 2 (step S103), rewrites the contents of the network group information, and transfers it to the node D (step S105).

  Node C receives network group information related to group management device 1 from node A and further receives network group information related to group management device 2 from node E within the standby time. In this case, the management information analysis unit 401 analyzes two pieces of network group information, and the group selection unit 402 selects an appropriate group based on the group management apparatus and hop count information extracted by the management information analysis unit 401. Then, the selected network group information is stored in the group information management unit 406 (steps S102 to S104). The group information management unit 406 also manages the adjacency relationship analyzed by the adjacency analysis unit 404 from the transmission source information of the network group information. In this case, since the number of hops is the same two, the node C may select any management group, for example, by determining that it belongs to the group that received the network group information earlier. Here, as an example, node C selects group 1.

  Thereafter, the node C rewrites the contents of the network group information, the network group information of the group management apparatus 1 received from the node A is sent to the node E, and the network group information of the group management apparatus 2 received from the node E is changed to the node E Further, the network group information of the group management apparatuses 1 and 2 received from the nodes A and E is transferred to the node A, respectively, to the node D (step S105).

  The node D receives the network group information related to the group management device 1 from the node B, receives the network group information related to the group management device 2 from the node F, and further receives the group management devices 1 and 2 from the node C within the standby time. Receive network group information about. The node D performs processing from analysis to selection of the group and storage of the selected network group information for the received three network group information (steps S102 to S104), rewriting the contents of the network group information, Transfer to C and F (step S105). As in the case of the node C, since both the network group information of the group 1 and the group 2 has the same number of hops, any group may be selected. Here, as an example, the node D selects the group 2.

  In addition, after receiving the network group information after each of the above processes (steps S102 to S104), each node performs processes from analysis to group selection and storage of the selected network group information (step S102 ′). ~ S104 ').

  The node A receives the network group information related to the group management apparatus 2 from the node C, and performs processing from analysis to selection of the group and storage of the selected network group information for the received network group information (steps S102 ′ to S104). '). In this case, since the number of hops described in the network group information from the group management apparatus 1 received earlier is smaller, the node A continues to select the group 1.

  The node B receives the network group information related to the group management apparatus 2 from the node D, and performs processing from analysis to selection of the group and storage of the selected network group information with respect to the received network group information (steps S102 ′ to S104). '). In this case, since the number of hops described in the network group information from the previously received group management apparatus 1 is smaller, the node B continues to select the group 1.

  The node C receives network group information related to the group management apparatuses 1 and 2 from the node D, and performs processing from analysis to selection of the group and storage of the selected network group information for the received network group information (step S102 ′). ~ S104 '). In this case, although the number of hops is 4, since the number of hops at the time of the selection process (step S103) is smaller (hop number 2), node C continues to select group 1.

  The node E receives network group information related to the group management apparatus 1 from the node C, and performs processing from analysis to selection of the group and storage of the selected network group information for the received network group information (steps S102 ′ to S104). '). In this case, since the number of hops described in the network group information from the group management apparatus 2 received earlier is smaller, the node E continues to select the group 2.

  The node F receives the network group information related to the group management apparatus 1 from the node D, and performs processing from analysis to selection of the group and storage of the selected network group information for the received network group information (steps S102 ′ to S104). '). In this case, since the number of hops described in the network group information from the group management apparatus 2 received earlier is smaller, the node F continues to select the group 2.

  Next, each node that has selected the group notifies the group management apparatus that manages the selected group from the participation / removal request transmission unit 405 that the node belongs to the group after a predetermined time has elapsed. (Step S106). For example, the predetermined time may be set as a certain time after first receiving the network group information, but is not limited thereto. However, the time is sufficiently longer than the waiting time. As a result, when the node performs the group selection process in a short time, it is possible to avoid wasting network bandwidth by notifying the group management apparatus each time.

  FIG. 5 is a diagram illustrating a configuration example of network group information transmitted from each node to the group management apparatus. The network group information includes a node, a group to which the network group belongs, and an adjacent node. The node indicates a node from which network group information is generated. For the affiliation group, enter the name of the affiliation group selected by the own node. The adjacent node indicates information of a node adjacent to the own node and capable of directly transmitting / receiving information. For example, in the case of the node A, information on the nodes B and C adjacent to the own node is included in the network group information and transmitted so that the group management apparatus 1 that has received the notification can manage the configuration of the network group.

  In addition, when the information on the number of hops is changed due to a network configuration change after the operation is started, and a closer group management device is found, each node manages a group that manages the group to which it belongs from the join / leave request transmission unit 405 A new group may be formed by notifying the management device that the user is leaving and notifying the group management device that manages the group to which the management device will newly belong.

  The group management apparatus 1 receives the network group information transmitted from the nodes A, B, and C in the device information collection unit 302, and stores the contents of the network group information in the group configuration management unit 303 (step S107). In addition, the group management apparatus 1 notifies the host network management apparatus 100 of the received network group information from the nodes A, B, and C from the monitoring group information transmission unit 304.

  Similarly, the group management apparatus 2 receives the network group information transmitted from the nodes D, E, and F in the device information collection unit 302, and stores the contents of the network group information in the group configuration management unit 303 (step S107). . Further, the group management apparatus 2 notifies the received network group information from the nodes D, E, and F from the monitoring group information transmission unit 304 to the upper network management apparatus 100.

  Thereby, the upper network management apparatus 100 can manage information of the entire network. Further, the group management devices 1 and 2 can perform network hierarchy management based on the stored information.

  For example, when information is collected or controlled (set) for the node A, the upper network management device 100 makes a request to the group management device 1 of the group 1 to which the node A belongs. The group management apparatus 1 that has received the request by the control request reception unit 305 is in an operation mode in which information collection or control (setting) is performed on the node A via the monitoring control unit 306.

  As described above, according to the present embodiment, the node 400 that forms a large-scale network such as a mesh topology forms a group by autonomously selecting the group management device 300 that manages the group, and the group The management apparatus 300 manages only the nodes 400 belonging to the group. As a result, the group management apparatus 300 can limit the management target to only the nodes 400 in the group, so that the hierarchical management of the network with a reduced processing load is possible.

  When network group information is received from a plurality of group management apparatuses 300, the node 400 analyzes the number of hops from the group management apparatus 300 that is the transmission source, and belongs to a group under the group management apparatus 300 that is closer to the own node. It was decided to. As a result, the group management apparatus 300 can manage the adjacent nodes 400 and can realize efficient group management.

  Further, the group management apparatus 300 manages only the nodes 400 belonging to the group, and does not need to manage information on other groups. Therefore, it is possible to suppress transfer of duplicate data on the network, and it is possible to effectively use the communication band of the network by reducing the amount of information to be managed and avoiding unnecessary communication.

  Further, when the node 400 selects the group management device 300, the node 400 can easily identify a notification destination when an alarm or event is notified.

  Further, the node 400 does not need to grasp the other nodes 400 belonging to the group, and the group management apparatus 300 manages only the adjacent relationship of nodes necessary for managing the group configuration. Therefore, the amount of information managed by the node 400 can be suppressed.

  Further, since it is only necessary to determine and select the group management apparatus 100, that is, the group, based on the network group information transmitted from the group management apparatus 300, the network hierarchy is realized while suppressing the load on the node 400. can do.

  Further, since it can be applied to a network having an irregular configuration such as a mesh network, grouping can be realized in a small-scale to large-scale network without being limited by the network configuration.

  Further, since the node 400 autonomously forms a group, it is possible to suppress the network layer design work manually and the load on the group management device 300 and the upper network management device 100.

  Further, since management traffic is generated only between the group management apparatus 300 and the nodes 400 under the group, it is possible to avoid wasting network bandwidth.

  In addition, because the group is hierarchized, the higher-level network management apparatus 100 can manage the entire network only by communication with a specific group management apparatus, so that information acquisition from a large number of node apparatuses constituting a large-scale network can be performed at high speed. Can be done.

Embodiment 2. FIG.
In this embodiment, when network group information is received from a plurality of group management devices, the node confirms the transmission source group management device with a short communication time of the network group information, and the group management device closer to the own node An operation for realizing hierarchical management of a network by selecting a group under management and forming a group will be described. A different part from Embodiment 1 is demonstrated.

  The configuration of each device in this embodiment is the same as that in FIG. FIG. 6 is a diagram illustrating a configuration example of a network. The connected devices are the same as in FIG. 2, but the contents of network group information transmitted from the group management device are different. FIG. 7 is a diagram illustrating a configuration example of network group information transmitted by the group management apparatuses 1 and 2. The network group information includes a group management device, the number of hops, a transmission source node, and a transmission time. The transmission time indicates a transmission time when the group management apparatuses 1 and 2 transmit the network group information. The group management apparatuses 1 and 2 transmit the transmission time together so that the nodes A to F can measure the communication (arrival) time. Specifically, an operation in which each node autonomously forms a group will be described. The operation of each device of the network shown in FIG. 6 is the same as the sequence diagram of FIG.

  Operations in the nodes A, B, E, and F are the same as those in the first embodiment. Nodes A and B select group 1 and nodes E and F select group 2 based on the number of hops described in the network group information.

  The node C receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node, transmission time) described in the network group information shown in FIG. Next, in node C, the group selection unit 402 has the same number of hops from the group management devices 1 and 2 extracted by the management information analysis unit 401. (Communication time with the management apparatus) is calculated, and the group under the group management apparatus whose communication time is shorter is selected (step S103). In the first embodiment, when the number of hops from the group management apparatuses 1 and 2 is the same, any group can be selected. By selecting a group in this way, each node An advantageous group can be selected. Here, as an example, the node C determines the difference (communication time) between the transmission time of network group information from the group management device 1 (hereinafter referred to as transmission time 1) and the reception time of the information, and the group management device 2. The difference (communication time) between the transmission time of network group information (hereinafter referred to as transmission time 2) and the reception time of the information is calculated, and the communication time with the group management device 1 is shorter. Select group 1. Other operations are the same as those in the first embodiment.

  Similarly, the node D receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node, transmission time) described in the network group information shown in FIG. Next, in the node D, the group selection unit 402 has the same hop count from the group management devices 1 and 2 extracted by the management information analysis unit 401. (Communication time with the management apparatus) is calculated, and the group under the group management apparatus whose communication time is shorter is selected (step S103). Here, as an example, the node D transmits the difference (communication time) between the transmission time 1 of the network group information from the group management device 1 and the reception time of the information, and the transmission time 2 of the network group information from the group management device 2. And the reception time of the information (communication time) are respectively calculated, and the group 2 is selected because the communication time with the group management device 2 is shorter. Other operations are the same as those in the first embodiment.

  As described above, according to the present embodiment, the node 400 that has received network group information from a plurality of group management devices 300 is based on the communication time with each group management device 300 when the number of hops is the same. To select a group. Thereby, each node 400 can belong to a group under the group management apparatus 300 closer to the own node, and the group management apparatus 300 can manage the adjacent node 400, thereby realizing efficient group management. It becomes possible.

  Note that although the transmission time described in the network group information has been described as being used when the number of hops is the same, the present invention is not limited to this. For example, in the nodes A, B, E, and F, the group may be selected based on the information on the communication time with the group management apparatuses 1 and 2 without using the information on the number of hops. This makes it possible to determine a neighboring group management device based on the number of hops only (when the number of hops is small but the distance is long). By selecting a device, it is possible to belong to a group under the group management device closer to the own node.

Embodiment 3 FIG.
In this embodiment, when network group information is received from a plurality of group management devices, the node analyzes the configuration of the group management device and confirms the reliability of the group management device (reliability due to the presence or absence of redundancy). The operation for realizing the hierarchical management of the network by selecting a group under the management of the more reliable group management apparatus and forming the group will be described. A different part from Embodiment 1, 2 is demonstrated.

  The configuration of each device in this embodiment is the same as that in FIG. FIG. 8 is a diagram illustrating a configuration example of a network. The connected devices are the same as in FIG. 2, but the contents of network group information transmitted from the group management device are different. FIG. 9 is a diagram illustrating a configuration example of network group information transmitted by the group management apparatuses 1 and 2. The network group information includes a group management device, the number of hops, a transmission source node, and whether redundancy is present. The presence / absence of redundancy is information indicating whether the group management apparatuses 1 and 2 have a redundant configuration. When the nodes A to F perform communication with an emphasis on reliability, the group management apparatuses 1 and 2 transmit the presence / absence of redundancy for use as information when selecting a group. Here, as an example, it is assumed that the group management apparatus 1 is “redundant” and the group management apparatus 2 is “no redundancy”. Specifically, an operation in which each node autonomously forms a group will be described. The operation of each device of the network shown in FIG. 8 is the same as the sequence diagram of FIG.

  Each node receives the network group information transmitted from each group management apparatus and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node, redundancy) described in the network group information shown in FIG. Here, in each node, the group selection unit 402 selects an appropriate group based on the group management device, the number of hops, and redundancy information extracted by the management information analysis unit 401 (step S103).

  When network group information is received from a plurality of group management devices, the group selection unit 402 of each node analyzes whether the received network group information is redundant, and if it is necessary to belong to a more reliable group management device The group under the group management apparatus that has sent the network group information with redundancy (reliable) regardless of the number of hops is selected (step S103). That is, when importance is attached to communication reliability by efficiently performing communication by reducing the number of hops, a group is selected by the group management apparatus that has transmitted network group information with redundancy. As in the first and second embodiments, it is possible to make a selection with an emphasis on the number of hops.

  For example, the node C receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node, redundancy) described in the network group information shown in FIG. Next, in the node C, the group selection unit 402 confirms the information on the number of hops from the group management devices 1 and 2 extracted by the management information analysis unit 401 and the presence / absence of redundancy. In the first embodiment, any group can be selected, but when it is determined that it is necessary to select a highly reliable group based on the content of communication performed by the node, information with redundancy is transmitted. The group 1 of the group management apparatus 1 has been selected. As a result, the node C can perform communication with improved reliability.

  Similarly, the node D receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node, redundancy) described in the network group information shown in FIG. Next, in the node D, the group selection unit 402 confirms the information on the number of hops from the group management devices 1 and 2 extracted by the management information analysis unit 401 and the presence / absence of redundancy. In the first and second embodiments, group 2 is selected. However, if it is determined that it is necessary to select a highly reliable group from the contents of communication performed by the own node, information with redundancy is transmitted. The group 1 of the selected group management apparatus 1 is selected. As a result, the node D can perform communication with improved reliability. Other operations are the same as those in the first embodiment.

  In FIG. 8, the nodes A and B select the group 1 under the group management apparatus 1 regardless of the number of hops, communication reliability, or any of the conditions. On the other hand, the nodes E and F select the group 2 under the group management apparatus 2 when priority is given to the hop count condition over the communication reliability.

  As described above, according to the present embodiment, the node 400 that has received the network group information from the plurality of group management apparatuses 300 is made redundant with the information on the presence / absence of redundancy when performing highly reliable communication. The group management device 300 that is the transmission source of the network group information that indicates “Yes” is selected and belongs to the group under the group management device 300 with higher reliability. As a result, network hierarchy management with improved network management reliability is possible.

  Although the case where communication reliability is more important than the number of hops has been described, the present invention can also be applied to the second embodiment. That is, each node can select a group in which communication reliability is more important than communication time.

Embodiment 4 FIG.
In this embodiment, when network group information is received from a plurality of group management devices, the node checks the number of nodes managed by the group management device, and the number of nodes to be managed is small (the load of the group management device is small). An operation for realizing the hierarchical management of the network by selecting the (low) group and forming the group will be described. A different part from Embodiments 1-3 is demonstrated.

  The configuration of each device in this embodiment is the same as that in FIG. FIG. 10 is a diagram illustrating a configuration example of a network. The connected devices are the same as in FIG. 2, but the contents of network group information transmitted from the group management device are different. Note that node D does not belong to any group. FIG. 11 is a diagram illustrating a configuration example of network group information transmitted by the group management apparatuses 1 and 2. The network group information includes a group management apparatus, the number of hops, a transmission source node, and the number of nodes belonging to the group. The number of nodes belonging to the group indicates the number of nodes belonging to the group managed by the group management apparatus that is the generation source of the network group information. Specifically, an operation in which each node autonomously forms a group will be described. The operation of each device of the network shown in FIG. 10 is the same as the sequence diagram of FIG.

  Operations in the nodes A, B, E, and F are the same as those in the first embodiment. Nodes A and B select group 1 and nodes E and F select group 2 based on the number of hops described in the network group information. Node C has the same number of hops in both groups 1 and 2. However, as described in the first embodiment, node C selects group 1 because it has been received first, and the group to which it belongs has already been determined. It shall be. Here, the node D that does not belong to the group will be described.

  The node D receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, source node, number of nodes belonging to the group) described in the network group information shown in FIG. Next, in node D, the group selection unit 402 confirms the number of nodes belonging to each group because the number of hops from the group management devices 1 and 2 extracted by the management information analysis unit 401 is the same, and the number of nodes The group with the smaller number is selected (step S103). Here, since the number of nodes belonging to group 1 is 3 and the number of nodes belonging to group 2 is 2, node D selects group 2. When the conditions for the number of hops are the same, the processing load of the group management apparatus can be smoothed in the network by selecting a group with a small number of nodes belonging to the node D. Other operations are the same as those in the first embodiment.

  As described above, according to the present embodiment, when a node 400 that has received network group information from a plurality of group management devices 300 has the same number of hops, the group management device 300 included in the information manages the node 400. The number of nodes 400 to be checked is confirmed, and a group having a smaller number of nodes 400 to be managed and a lower load on the group management apparatus 300 is selected. Thereby, it is possible to realize hierarchical management of the network in which the processing load of the group management device 300 is smoothed.

  In addition, although the group membership node number described in the network group information has been described as being used when the number of hops is the same, the present invention is not limited to this. For example, when the communication time and the redundancy condition described in the second and third embodiments are the same, the information on the number of nodes belonging to the group can be used.

  Moreover, although the case where the group management apparatus transmits the number of group belonging nodes as a fixed value has been described, the present invention is not limited to this. For example, the node that transfers the network group information may rewrite and transfer the number of nodes belonging to the group based on the group selected by the own node, similarly to the information on the number of hops and the source node.

Embodiment 5 FIG.
In this embodiment, when network group information is received from a plurality of group management devices, the node confirms the status of the group management device and has a low response waiting time, that is, a group management device closer to the own node. An operation for realizing hierarchical management of a network by selecting a group under management and forming a group will be described. Different parts from the first to fourth embodiments will be described.

  The configuration of each device in this embodiment is the same as that in FIG. The network configuration is the same as in FIG. Specifically, an operation in which the node 400 autonomously forms a group will be described. FIG. 12 is a sequence diagram showing the operation of each device in the network shown in FIG.

  Operations in the nodes A, B, E, and F are the same as those in the first embodiment. Nodes A and B select group 1 and nodes E and F select group 2 based on the number of hops described in the network group information.

  The node C receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node) described in the network group information shown in FIG. Next, in the node C, the group selection unit 402 selects a group based on the network management information extracted by the management information analysis unit 401, but the number of hops from the group management devices 1 and 2 is the same. Therefore, the node C checks the response time with the group management device 1 and the group management device 2 in the group management device status confirmation unit 409 (step S201), and selects the group under the group management device with the shorter response time. Select (step S103). The response time can be confirmed using a general tool such as ping (packet internet groper). Here, it is assumed that the response confirmation time with the group management device 1 is shorter than the response time with the group management device 2, and the node C selects the group 1 (step S103).

  Similarly, the node D receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node) described in the network group information shown in FIG. Next, in the node D, the group selection unit 402 selects a group based on the network management information extracted by the management information analysis unit 401, but the number of hops from the group management devices 1 and 2 is the same. Therefore, the node D checks the response time with the group management device 1 and the group management device 2 in the group management device status confirmation unit 409 (step S201), and selects the group under the group management device with the shorter response time. Select (step S103). Here, assuming that the response confirmation time with the group management device 2 is shorter than the response time with the group management device 1, the node D selects the group 2 (step S103).

  Thus, when the number of hops is the same, the nodes C and D check the status with the group management apparatuses 1 and 2 and select the one with a shorter response time, so that the group management with a sufficient network bandwidth can be performed. You can select groups under the device. Other operations are the same as those in the first embodiment.

  Note that the response time confirmation is not limited to the case where the number of hops is the same. For example, the node A receives the network group management information from the group management device 1 and then receives the network from the group management device 2. The group management information is also received, but the response time may be confirmed at this timing (step S201). The group management device 1 has a smaller number of hops, but depending on the state of the group management device 1, the response time may be longer. In such a case, an opportunity for node A to change from group 1 to group 2 can be obtained. The same applies to nodes B, E, and F.

  As described above, according to the present embodiment, the node 400 that has received the network group information from the plurality of group management apparatuses 300 confirms the status of the group management apparatus 300 and responds when the hop count is the same. The group management device 300 that is closer to the own node than the one with less waiting time or that is on a communication path with a sufficient network bandwidth is selected. As a result, the group management apparatus 300 can monitor the node 400 via a path that is close or has a margin in the communication band of the network, and thus it is possible to realize efficient group management.

  Although the case where the number of hops is the same has been described, the present invention is not limited to this. The present invention can also be applied to the case where the communication time, the presence / absence of redundancy, and the number of belonging nodes described in the second to fourth embodiments are the same.

Embodiment 6 FIG.
In the present embodiment, when network group information is received from a plurality of group management devices, the node confirms the state of the group management device and confirms the load that is the state of the CPU and the memory of the group management device. The operation for realizing the hierarchical management of the network by selecting a group under the management of the group management apparatus having more processing capacity and forming the group will be described. A different part from Embodiment 5 is demonstrated.

  The sequence diagram showing the configuration of each device, the network configuration, and the operation between the devices in the present embodiment is the same as that in the fifth embodiment. Here, when a plurality of network group management information is received and the number of hops is the same, the node confirms the load state as a method for confirming the state of the group management apparatus. The operation of each node will be described.

  Operations in the nodes A, B, E, and F are the same as those in the first embodiment. Nodes A and B select group 1 and nodes E and F select group 2 based on the number of hops described in the network group information.

  The node C receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node) described in the network group information shown in FIG. Next, in the node C, the group selection unit 402 selects a group based on the network management information extracted by the management information analysis unit 401, but the number of hops from the group management devices 1 and 2 is the same. Therefore, the node C confirms the load status of the group management device 1 and the group management device 2 in the group management device status confirmation unit 409 (step S201), and selects a group under the group management device with sufficient processing capacity. Select (step S103). Specifically, the node C analyzes the load states of the CPUs and the memories of the group management apparatuses 1 and 2, and selects the one with more processing capacity (step S103). The load state can be confirmed using a general tool such as telnet (telecommunication network) or snmp (simple network management protocol). The node C acquires information on the CPU usage rate and the remaining capacity of the memory, and selects the group 1 on the assumption that the group management device 1 has more load capacity than the group management device 2 (step S103).

  Similarly, the node D receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node) described in the network group information shown in FIG. Next, in the node D, the group selection unit 402 selects a group based on the network management information extracted by the management information analysis unit 401, but the number of hops from the group management devices 1 and 2 is the same. Therefore, the node D confirms the load status of the group management device 1 and the group management device 2 in the group management device status confirmation unit 409 (step S201), and selects a group under the group management device having a sufficient processing capacity. Select (step S103). Specifically, the node D analyzes the load states of the CPUs and the memories of the group management apparatuses 1 and 2, and selects the one with more processing capacity (step S103). Here, the node D acquires information on the usage rate of the CPU and the remaining capacity of the memory, and selects the group 2 on the assumption that the group management device 2 has more load capacity than the group management device 1 (step S103). ).

  Thus, when the number of hops is the same, the nodes C and D check the status with the group management apparatuses 1 and 2 and select the one with the smaller processing load of the group management apparatus, so that the network bandwidth can be spared. A group under a certain group management device can be selected. Other operations are the same as those in the first embodiment.

  As in the fifth embodiment, the load confirmation is not limited to the case where the number of hops is the same. For example, in the node A, after receiving the network group management information from the group management device 1, Although the network group management information from the management apparatus 2 is also received, the load may be confirmed at this timing (step S201). The group management device 1 has a smaller number of hops, but depending on the state of the group management device 1, the load may be large and the network bandwidth may have no margin. In such a case, an opportunity for node A to change from group 1 to group 2 can be obtained. The same applies to nodes B, E, and F.

  As described above, according to the present embodiment, the node 400 that has received the network group information from the plurality of group management apparatuses 300 checks the load of the group management apparatus 300 when the number of hops is the same. By analyzing the load on the CPU and the memory of the management apparatus 300, a group under the group management apparatus 300 with more processing capacity is selected. As a result, network hierarchization management in which the load of the group management apparatus 300 is smoothed is also possible.

  Although the case where the number of hops is the same has been described, the present invention is not limited to this. The present invention can also be applied to the case where the communication time, the presence / absence of redundancy, and the number of belonging nodes described in the second to fourth embodiments are the same.

Embodiment 7 FIG.
In this embodiment, when network group information is received from a plurality of group management devices, the node confirms the status of the group management device, and the performance of the group management device (information such as the CPU type) is high. The operation for realizing the hierarchical management of the network by selecting a group under the management of the group management apparatus having more processing capacity by confirming the performance server) and forming the group will be described. A different part from Embodiment 5 and 6 is demonstrated.

  The configuration of each device, the network configuration, and the sequence diagram showing the operation between the devices in the present embodiment are the same as those in the fifth and sixth embodiments. Here, when a plurality of network group management information is received and the number of hops is the same, the node confirms performance as a method of confirming the state of the group management apparatus. The operation of each node will be described.

  Operations in the nodes A, B, E, and F are the same as those in the first embodiment. Nodes A and B select group 1 and nodes E and F select group 2 based on the number of hops described in the network group information.

  The node C receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node) described in the network group information shown in FIG. Next, in the node C, the group selection unit 402 selects a group based on the network management information extracted by the management information analysis unit 401, but the number of hops from the group management devices 1 and 2 is the same. Therefore, the node C confirms the performance of the group management device 1 and the group management device 2 in the group management device status confirmation unit 409 (step S201), and selects a group under the high-performance group management device (step S201). S103). Specifically, the node C analyzes the CPU type of the group management apparatuses 1 and 2 and selects the one with more processing capacity (step S103). The performance information can be confirmed using a general tool such as telnet or snmp. As a result, the node C, as the CPU of the group management apparatus, obtains performance information by confirming information that serves as a performance index, such as the CPU type, the presence / absence of a multi-core processor, the number of cores in the multi-core processor, and the operating frequency of the CPU. You can analyze and select groups. Here, assuming that the group management device 1 has higher performance than the group management device 2, the node C selects the group 1 (step S103).

  Similarly, the node D receives the network group information transmitted from the group management apparatuses 1 and 2 and analyzes it by the management information analysis unit 401 (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node) described in the network group information shown in FIG. Next, in the node D, the group selection unit 402 selects a group based on the network management information extracted by the management information analysis unit 401, but the number of hops from the group management devices 1 and 2 is the same. Therefore, the node D confirms the performance of the group management device 1 and the group management device 2 in the group management device status confirmation unit 409 (step S201), and selects a group under the high performance group management device (step S201). S103). Specifically, the node D analyzes the CPU type of the group management apparatuses 1 and 2 and selects the one with more processing capacity (step S103). Here, assuming that the group management device 1 has higher performance than the group management device 2, the node C selects the group 1 (step S103).

  Thus, when the number of hops is the same, the nodes C and D can check the performance of the group management apparatuses 1 and 2 and select a group under the high-performance group management apparatus. Other operations are the same as those in the first embodiment.

  As in the fifth and sixth embodiments, the performance check is not limited to the case where the number of hops is the same. For example, in the node A, after receiving the network group management information from the group management device 1, The network group management information from the group management apparatus 2 is also received, but the performance of the group management apparatus may be confirmed at this timing (step S201). The group management device 1 has a smaller number of hops, but the group management device 2 has higher performance and a sufficient processing capacity. In such a case, an opportunity for node A to change from group 1 to group 2 can be obtained. The same applies to nodes B, E, and F.

  As described above, according to the present embodiment, the node 400 that has received the network group information from the plurality of group management devices 300 confirms the performance of the group management device 300 when the number of hops is the same, and the CPU By analyzing the performance of the group management apparatus 300 based on this information, a group under the group management apparatus 300 with more processing performance is selected. As a result, network hierarchization management in which the load of the group management apparatus 300 is smoothed is also possible.

  Although the case where the number of hops is the same has been described, the present invention is not limited to this. The present invention can also be applied to the case where the communication time, the presence / absence of redundancy, and the number of belonging nodes described in the second to fourth embodiments are the same.

Embodiment 8 FIG.
In this embodiment, in preparation for a failure of a group management device, a node participates in a plurality of groups, and even when one of the group management devices fails, the group management device continues to monitor the node. An operation for realizing a network hierarchy management method that eliminates the non-monitoring time during the device failure occurrence period and can continue monitoring the network group even when a failure occurs in the group management device will be described. A different part from Embodiment 1-7 is demonstrated.

  The configuration of each device in the present embodiment is the same as that in FIG. FIG. 13 is a diagram illustrating a configuration example of a network. The connected devices are the same as those in FIG. 2 except that the group management device receives information on nodes belonging to other groups. FIG. 14 is a sequence diagram showing the operation of each device in the network shown in FIG. The operation of each device will be described.

  First, the group management devices 1 and 2 use the group management information generation unit 301 to generate network group information storing the information of the device itself (step S100) and transmit it to the adjacent node A (step S101). At this time, the network group information transmitted by the group management apparatuses 1 and 2 is, for example, the same as that shown in FIG.

  Here, the flow of communication between nodes until each node transmits network group information to each group management apparatus (step S106) is the same as that in the first embodiment (see FIG. 3). At this time, each node receives the network group management information from the two group management apparatuses, and has selected to belong to one of the groups. In the present embodiment, for example, the group under the group management device that has transmitted the network group information that has the next smallest number of hops (the second highest selection condition) is selected as an alternative group management device prepared for a failure (step In step S103 or step S103 ′), the information is stored in the group information management unit 406 (step S104 or step S104 ′). The group information management unit 406 also manages the adjacency relationship analyzed by the adjacency analysis unit 404 from the transmission source node of the network group information. That is, each node selects two group management devices.

  Each node notifies the active group management apparatus that manages the selected group that the node belongs to the group from the participation / removal request transmission unit 405 (step S106). At the same time, the participation / removal request transmission unit 405 notifies the substitution group management apparatus that the group belongs to another group (step S301). At this time, the notification from each node to the group management apparatus is the same as the network group information shown in FIG.

  Specifically, the node A has selected to belong to the group 1 under the group management apparatus 1 in the process of steps S102 to S105 and steps S102 'to S104' (step S103). In the node A, the network group information is also received from the group management device 2, but in this embodiment, the group management device 2 that manages the group 2 is selected as an alternative group device (step S103 '). After selecting that the node B belongs to the group 1 under the group management apparatus 1 (step S103), the group management apparatus 2 that manages the group 2 is selected as an alternative group apparatus (step S103 '). In addition, in the process of step S103, the node C selects belonging to the group 1 under the group management apparatus 1, and selects the group management apparatus 2 that manages the group 2 as an alternative group apparatus. The nodes A, B, and C notify the group management apparatus 1 from the participation / removal request transmission unit 405 that the own node belongs to the group (step S106). Also, the group management device 2 is notified from the participation / removal request transmission unit 405 that it belongs to another group (group 1) (step S301).

  Similarly, the node E has selected to belong to the group 2 under the group management apparatus 2 in the process of steps S102 to S105 and steps S102 'to S104' (step S103). In the node E, the network group information is also received from the group management apparatus 1, but in this embodiment, the group management apparatus 1 that manages the group 1 is selected as an alternative group apparatus (step S103 '). The node F also selects that it belongs to the group 2 under the group management apparatus 2 (step S103), and then selects the group management apparatus 1 that manages the group 1 as an alternative group apparatus (step S103 '). In addition, in the process of step S103, the node D selects belonging to the group 2 under the group management apparatus 2, and selects the group management apparatus 1 that manages the group 1 as an alternative group apparatus. The nodes D, E, and F notify the group management apparatus 2 from the participation / removal request transmission unit 405 that the own node belongs to the group (step S106). Further, the participation / removal request transmission unit 405 notifies the group management apparatus 1 that it belongs to another group (group 2) (step S301).

  The group management apparatus 1 receives the network group information transmitted from the nodes A, B, and C in the device information collection unit 302, and stores the contents of the network group information in the group configuration management unit 303 (step S308). The group management device 1 performs hierarchical management of the network based on the stored information. Further, redundant grouping management is performed by storing information of other groups (nodes D, E, and F belonging to group 2) in the group configuration management unit 303 in the same manner.

  Similarly, the group management apparatus 2 receives the network group information transmitted from the nodes D, E, and F in the device information collection unit 302, and stores the contents of the network group information in the group configuration management unit 303 (step S308). . The group management device 2 performs network hierarchization management based on the stored information. Further, information on other groups (nodes A, B, and C belonging to group 1) is similarly stored in the group configuration management unit 303, thereby performing redundant network hierarchy management.

  When performing hierarchical management of redundant networks, during normal operation, the group management apparatuses 1 and 2 monitor and control nodes in the own group, and only monitor nodes in other groups. That is, control and setting are limited to the own group, and the load at the time of redundancy is reduced. When a failure occurs, other groups can be controlled.

  However, if the processing capacity of the group management device is sufficient, control from two group management devices is possible. If control is performed from a group management device in another group, control information is set from the node that received the control request. By notifying the later information to the group management device of the own group, it is possible to match the information with other groups. The failure of the group management apparatus of the own group is detected by the group management apparatus status confirmation unit 409 of each node periodically monitoring the group management apparatus, and after detection, notifies the group management apparatus of the other group. As a result, the group management apparatus in the other group knows that a failure has occurred in the other group management apparatus.

  As described above, according to the present embodiment, in preparation for a failure of the group management device 300, the node 400 registers with a plurality of group management devices 300, and when a failure occurs in one group management device 300, Also, the other group management device 300 can monitor the node. As a result, the non-monitoring time during the failure occurrence period of the group management apparatus 300 is eliminated, and the network group monitoring can be continued even if a failure occurs in the group management apparatus 300.

  Note that conditions other than the number of hops may be used for the method of selecting an alternative group management device. For example, as described in the second to seventh embodiments, the selection may be made based on conditions such as the communication time, the presence / absence of redundancy, the number of nodes belonging to the group, the state of the group management apparatus, and the like.

Embodiment 9 FIG.
In this embodiment, in a network with an asymmetric configuration, a node identifies a group to which an adjacent node belongs, thereby avoiding the presence of another group of nodes on the path between the group management device and the own node. The operation of the network hierarchization management method for realizing the efficient and optimum hierarchization by eliminating the case where the nodes in the group become enclaves ahead of other groups will be described. A different part from Embodiment 1-8 is demonstrated.

  The configuration of each device in this embodiment is the same as that in FIG. FIG. 15 is a diagram illustrating a configuration example of a network. The connected devices are the same as in FIG. 2, but the contents of network group information transmitted from the group management device are different. Further, it is assumed that no communication is performed between the node D and the node F. FIG. 16 is a diagram illustrating a configuration example of network group information transmitted from the group management apparatus 1 to the node A. The network group information includes a group management device, the number of hops, a transmission source node, and a transmission source node group. The transmission source node affiliation group indicates information on a group to which a node (transmission source node) that has directly transmitted the network group information belongs. When transferring network group information, the node rewrites information on the group to which the node belongs together with the number of hops and the source node. Specifically, an operation in which the node 400 autonomously forms a group will be described. The operation of each device of the network shown in FIG. 15 is the same as the sequence diagram of FIG.

  First, the group management devices 1 and 2 use the group management information generation unit 301 to generate network group information that stores information about the device itself (step S100), and transmit the network group information to adjacent nodes (step S101).

  Each node receives the network group information from the group management apparatuses 1 and 2, and the management information analysis unit 401 analyzes the network group information (step S102). Specifically, the management information analysis unit 401 extracts information (group management device, number of hops, transmission source node, transmission source node affiliation group) described in the network group information shown in FIG. Next, in each node, the group selection unit 402 selects an appropriate group based on the group management device extracted by the management information analysis unit 401, the number of hops, the transmission source node, and the transmission source node group information ( Step S103). When network group information is received from a plurality of group management devices, the group selection unit 402 of each node has a smaller number of hops and a group under the group management device (same network group information that is sent to the adjacent node) The same group as the adjacent node) is selected (step S103). When transferring the network group information (step S105), each node rewrites the information of the group to which the own node belongs in the same manner as the number of hops and the source node. Thereby, the node which received network group information can grasp | ascertain the group to which the adjacent node which transmitted the said information belongs.

  Specifically, after receiving the network group information from the group management device 1, the node A has a small number of hops and an adjacent device manages the group 1 based on the information extracted by the management information analysis unit 401. Since it is the group management apparatus 1, group 1 is selected (step S103). When node A transfers network group information, it rewrites the item of the group to which the node belongs (source node group) together with the number of hops and the source node. Here, since group 1 is selected, it is described as group 1 and then transferred to nodes B and C (step S105).

  In the node B, after receiving the network group information from the node A, the number of hops is small and the adjacent node A belongs to the group 1 based on the information extracted by the management information analysis unit 401. The same group 1 is selected (step S103). When transferring the network group information, as in the case of the node A, the item of the transmission source node belonging group is rewritten together with the number of hops and the transmission source node. Here, since group 1 is selected, it is described as group 1 and then transferred to node D (step S105).

  For nodes E and F, group 2 is selected by performing the same processing as described above (step S103). In this case, the nodes E and F transfer the network group information after rewriting the transmission source node group to group 2 (step S105).

  After receiving the network group information from the nodes A and E, the node C selects a group from the number of hops and the information of the group belonging to the transmission source node based on the information extracted by the management information analysis unit 401 (step S103). . The node C can select any group, but here, it is assumed that the group 1 is selected for the reason such as having been received first as described in the first embodiment. A group advantageous to the own node may be selected based on the processing described in the second to seventh embodiments. Node C rewrites the group belonging to the transmission source node to group 1, network group information related to group management device 1 to node E, network group information related to group management device 2 to node A, and network group related to group management devices 1 and 2. Information is transferred to node D (step S105).

  In the node D, the network group information from the group management apparatus 1 is received from the node B belonging to the group 1, and the network information from the group management apparatuses 1 and 2 is received from the node C belonging to the group 1. . After receiving the network group information, based on the information extracted by the management information analysis unit 401, a group is selected from the number of hops and the information of the group belonging to the transmission source node (step S103). Here, the number of hops from the group management apparatuses 1 and 2 is the same. However, it can be determined from the network group information that the transmitted nodes B and C belong to the group 1 together. In addition, the network group information from the group management devices 1 and 2 is received from the node B and the node C, but the group management device is analyzed by analyzing the information of adjacent nodes stored in the respective network group information (step S102). It can be seen that the network group information from 2 passes through a node belonging to another group (node C belonging to group 1). When the node D selects the group 2, it goes through a node belonging to the group 1 with the group management device 2 and becomes an enclave state. Therefore, the node D selects the same group 1 as the adjacent node (step S103).

  As described above, in the present embodiment, in a network with an asymmetric configuration, the node 400 identifies another group belonging to the adjacent node 400, so that another group is placed on the path between the group management device 300 and the own node. The node 400 in the group is avoided, and the case where the node 400 in the group becomes an enclave beyond the other group is eliminated. As a result, it is possible to realize efficient and optimal hierarchization that avoids overlapping of groups.

Embodiment 10 FIG.
In this embodiment, the group management apparatus transfers notifications received from the nodes in the group to the higher-level network management apparatus, and collects control (setting) requests from the higher-level network management apparatus to control the corresponding nodes. An operation for realizing the method will be described.

  The configuration of each device in the present embodiment is the same as that in FIG. The network configuration is the same as in FIG. 17 and 18 are sequence diagrams showing the operation of each device in the network shown in FIG. After each node forms a group, the process between the upper network management apparatus 100 and the node is shown. Processing with nodes D, E, and F in group 2 via group management device 2 is the same as processing with nodes A, B, and C in group 1 via group management device 1. Therefore, the operation with the nodes A, B, and C via the group management apparatus 1 will be described.

  First, the group management apparatus 1 notifies the upper group management apparatus 100 of the completion of group formation (step S400). Thereby, the upper level group management apparatus 100 can grasp which node belongs to the group under the group management apparatus. When making settings for a node, the upper group management apparatus 100 issues a setting request to the group management apparatus to which the target node belongs. For example, when setting the nodes A and C, the upper group management apparatus 100 issues a setting request to the group management apparatus 1 (step S401).

  The group management device 1 accepts a request from the higher-level network management device 100 via the control request accepting unit 305 (step S402), analyzes the received information by the monitoring control unit 306, and applies to the corresponding nodes A and C. Setting processing is performed (step S403). Setting and control of the nodes A and C can be realized by a general tool such as telnet, ftp (file transfer protocol), and snmp.

  The nodes A and C perform setting control in response to a request from the group management apparatus 1 (step S404), and the setting information is stored in the device information management unit 408 by the device information control unit 407 (step S405). Thereafter, in the nodes A and C, the device information control unit 407 transmits a node device setting response to the group management device 1 based on the contents of the group information management unit 406 (step S406).

  The group management device 1 receives the node device setting response transmitted from the nodes A and C via the device information collection unit 302, stores the received setting result in the group configuration management unit 303, and monitors the completion of the setting. The group information transmission unit 304 notifies the higher level network management apparatus 100 as a response (step S407).

  By performing the notification as described above, hierarchical management via the group management apparatus is started between the upper network management apparatus 100 and each node. If any event occurs in any node during operation, the corresponding node notifies the group management unit 1 of the occurrence via the device information control unit 407 (step S408). For example, in FIG. 17, an event occurs in each of node A, node B, and node C, and the occurrence of the event is notified from each node to the group management apparatus 1.

  The group management apparatus 1 receives the event occurrence notification by the device information collection unit 302 (step S408), analyzes the event information by the device information collection unit 302 (step S409), and stores the event information in the group configuration management unit 303. (Step S410), the monitoring group information transmission unit 304 notifies the host network management apparatus 100 of the occurrence of the event (Step S411). Thereby, the upper network management apparatus 100 can manage the entire network.

  Further, during operation, each node performs periodic monitoring of the group management apparatus 1 by the group management apparatus status confirmation unit 409 (step S412). When a failure occurs in the group management device 1, each node can detect the failure of the group management device 100 by the group management device status confirmation unit 409 due to the response interruption of the group management device 1 (step S413).

  At this time, if each node that has detected a failure participates in a plurality of groups, the information of the other group management device 2 is acquired from the group information management unit 406, and the other group management device status confirmation unit 409 receives another group. The occurrence of a failure is notified to the management apparatus 2 (step S414). For example, in FIG. 18, as in the eighth embodiment, the nodes A, B, and C select the group management device 1 as the group management device for the working group, and the group management device 2 as the replacement group management device for the spare group. Is stored in the group information management unit 406, information on the alternative group management device can be obtained.

  In FIG. 18, after the group management device 2 notifies the host network management device 100 of the failure of the group management device 1 (step S415), the notification information from the nodes belonging to the group 1 is always sent as in the eighth embodiment. Since it is received, the nodes A, B, and C of the group 1 can be continuously monitored even when the group management apparatus 1 fails. The subsequent processing during operation is the same as in the case of FIG. 17 described above (steps S400 to S411).

  As described above, according to the present embodiment, the group management apparatus 300 transfers the notification received from the intra-group node to the higher-level network management apparatus 100, and also receives a control (setting) request from the higher-level network management apparatus 100. It was decided to control the corresponding node in a unified manner. Thereby, the processing load of the upper network management apparatus 100 can be reduced. It is also possible to reduce the amount of monitoring traffic between the higher-level network management device 100 and the group management device 300.

  Further, in preparation for a failure of the group management device 300, the node 400 registers a group in a plurality of group management devices 300, and the node 400 constantly checks the state of the group management device, so that one group management device 300 fails. Even if this occurs, the other group management device 300 continues to monitor the node 400. Thereby, the non-monitoring time during the failure occurrence period of the group management apparatus 300 is eliminated, and the network group monitoring can be continued even if a failure occurs in the group management apparatus 300.

Embodiment 11 FIG.
In the present embodiment, an operation for realizing a network hierarchy management method in which a network is hierarchized by replacing a function of the group management apparatus by a node representing the network without using the group management apparatus will be described.

  FIG. 19 is a diagram illustrating a configuration example of a node 400 ′ of a network that realizes hierarchical management. The network includes a host network management device 100, a management network 200, and a node 400 '. The node 400 ′ is a terminal that forms a hierarchical network, but has a function of managing other nodes belonging to the group as a representative node. That is, the managing representative node and the managed normal node have the same configuration. The node 400 ′ includes a management information analysis unit 401 ′, a group selection unit 402 ′, a management information transfer unit 403 ′, an adjacent relationship analysis unit 404 ′, a participation / withdrawal request transmission unit 405 ′, and a group information management unit 406. ', Device information control unit 407', device information management unit 408 ', group management device status confirmation unit 409', device information collection unit 410, monitoring group information transmission unit 411, control request reception unit 412, And a monitoring control unit 413.

  The management information analysis unit 401 ′ analyzes network group information transmitted from the representative node in order to select an appropriate group when the group is autonomously formed. When the group selection unit 402 ′ receives network group information from a plurality of representative nodes, the group selection unit 402 ′ selects an appropriate group from the plurality of groups. The management information transfer unit 403 'transfers the received network group information to another node 400'. In addition, network group information, which is representative node information serving as determination information for forming a group, is generated and transmitted to the node 400 '. The same function as the group management information generation unit 301 in the group management apparatus 300 is also performed. The adjacency analysis unit 404 ′ analyzes the adjacency relationship of its own node as to which information is transferred from which node 400 ′ when receiving the network group information. The participation / removal request transmission unit 405 ′ requests the representative node to participate in or leave the managed group. The group information management unit 406 ′ manages information on a representative node that manages the formed group, a distance (number of hops) from the representative node, and group information that is configured. Also, the collected information of the node 400 ′ and the information on the adjacent relationship indicating the configuration of the network group are stored and managed. The same function as the group configuration management unit 303 in the group management apparatus 300 is also performed. Based on the acquisition request from the representative node, the device information control unit 407 'notifies the device information managed by the own node and the adjacent relationship. The device information management unit 408 'manages the device information of the own node. The group management device state confirmation unit 409 'confirms the state and response time with respect to the representative node.

  The device information collection unit 410 collects device information and adjacency information from the nodes 400 ′ in the group. The same function as the device information collection unit 302 in the group management apparatus 300 is performed. The monitoring group information transmitting unit 411 notifies the monitoring target group information to the higher-level network management apparatus 100 that operates and manages the entire network. The same function as the monitoring group information transmission unit 304 in the group management apparatus 300 is performed. The control request receiving unit 412 receives a control (setting) request for the node 400 ′ in the group transmitted by the upper network management apparatus 100. The same function as the control request accepting unit 305 in the group management apparatus 300 is performed. The monitoring control unit 413 performs control to reflect the control information requested from the higher-level network management apparatus 100 to the node 400 ′ in the group. The same function as the monitoring control unit 306 in the group management apparatus 300 is performed. In a plurality of configurations, the functions of the configuration of the group management apparatus 300 and the configuration of the node 400 described up to the tenth embodiment are overlapped. However, the configuration is not limited to this, and an independent configuration may be used. .

  Subsequently, an operation in which the node 400 ′ autonomously forms a group will be described. FIG. 20 is a diagram illustrating a configuration example of a network. The management network 200 includes one host network management device 100 and six nodes 400 ′ (hereinafter, representative node A ′, node B ′, node C ′, node D ′, representative node E ′, and node F, respectively). ') Indicates that the is connected. FIG. 21 is a sequence diagram showing the operation of each device in the network shown in FIG. Since the operations related to the representative node A ′ and the representative node E ′ are the same, the operation related to the representative node A ′ will be described in detail. The representative node A ′ manages the nodes belonging to the group A ′, and the representative node E ′ manages the nodes belonging to the group E ′.

  First, a representative node that manages a network group (referred to as representative node A ′) is selected, and the representative node A ′ generates network group information storing its own representative node information shown in FIG. 22 in the management information transfer unit 403 ′. (Step S500), and transmits to adjacent nodes B ′ and C ′ (step S501). The selection of the representative node may be determined by the network designer, may use a specific protocol, and can be set as a representative in any node 400 ′.

  FIG. 22 is a diagram illustrating a configuration example of network group information transmitted from the representative node A ′ to the node B. The network group information includes a representative node, the number of hops, and a transmission source node. The representative node indicates a generation source of network group information.

  The node B 'receives the network group information from the node A' and analyzes the network group information in the management information analysis unit 401 '(step S502). Specifically, the management information analysis unit 401 'extracts information (representative node, number of hops, transmission source node) described in the network group information shown in FIG.

  Next, in the node B ′, the group selection unit 402 ′ selects an appropriate group to which the node belongs, based on the representative node and hop count information extracted by the management information analysis unit 401 ′ (step S503). . When the network group information is received from a plurality of representative nodes, the group selection unit 402 ′ of the node B ′ analyzes the number of hops of the received network group information and transmits the network group information having a smaller number of hops. The subordinate group is selected (step S503) and stored in the group information management unit 406 ′ (step S504). In addition, the group information management unit 406 ′ also manages the adjacent relationship analyzed by the adjacent relationship analysis unit 404 ′ from the transmission source node of the network group information.

  On the other hand, when the network group information is not received from other representative nodes, the node B 'does not perform the comparison process and temporarily stores the network group information in the group information management unit 406'. Thereafter, when other network group information is received, it is compared with the stored information. If network group information is not received from another representative node even after waiting for a certain time, a group is selected based on the stored network group information. The standby time can be arbitrarily specified. Here, since the network group information is not received from other representative nodes after the standby time has elapsed, in the node B ′, the group selection unit 402 ′ selects the group A ′.

  Next, in the node B ′, the management information transfer unit 403 ′ rewrites the transmission source node of the network group information to the own node, further adds (+1) the hop number of the own node, and the adjacent node D Is transferred to '(step S505).

  The same applies to the operation related to the representative node E '. First, in the management information transfer unit 403 ′, the representative node E ′ generates network group information (see FIG. 22) storing the information of the own node (step S500), and transmits it to the adjacent nodes C ′ and F ′. (Step S501). Thereafter, the same processing as that of the node B ′ is performed, and the node F ′ selects the group E ′ (step S503), rewrites the contents of the network group information, and transfers it to the node D ′ (step S505).

  The node C ′ receives the network group information transmitted from the representative node A ′ within the standby time, and further receives the network group information transmitted from the representative node E ′. In this case, the management information analysis unit 401 ′ analyzes the two network group information, and the group selection unit 402 ′ selects an appropriate group based on the representative node and hop number information extracted by the management information analysis unit 401 ′. And the selected network group information is stored in the group information management unit 406 ′ (steps S502 to S504). The group information management unit 406 ′ also manages the adjacent relationship analyzed by the adjacent relationship analysis unit 404 ′ from the transmission source information of the network group information. In this case, since the conditions for the number of hops are both the same, the node C ′ may select any management group by determining that it belongs to the group that received the network group information earlier, for example. . Here, as an example, the node C ′ selects the group A ′.

  Thereafter, the node C ′ rewrites the contents of the network group information, and the network group information received from the representative node A ′ is received from the representative node A ′. Further, the network group information received from the representative nodes A ′ and E ′ is respectively transferred to the node D ′ (step S505).

  The node D ′ receives the network group information regarding the representative node A ′ from the node B ′, receives the network group information regarding the representative node E ′ from the node F ′, and further receives the network group information regarding the representative node E ′ from the node C ′ within the standby time. Network group information regarding A ′ and E ′ is received. The node D ′ performs processing from analysis to selection of the group and storage of the selected network group information for the received three network group information (steps S502 to S504), rewriting the contents of the network group information, and the node B Transfer to ', C', F '(step S505). As in the case of the node C ′, the network group information of any of the groups A ′ and E ′ has the same number of hops, and therefore any group may be selected. Here, as an example, the node D ′ selects the group E ′.

  Further, after receiving the network group information after each of the above processes (steps S502 to S504), each node performs processes from analysis to selection of a group and storage of the selected network group information (step S502 ′). ~ S504 ').

  The node B ′ receives network group information related to the representative node E ′ from the node D ′, and performs processing from analysis to group selection and storage of the selected network group information for the received network group information (step S502 ′). ~ S504 '). In this case, since the number of hops described in the network group information from the representative node A ′ received earlier is smaller, the node B ′ continues to select the group A ′.

  The node C ′ receives network group information related to the representative nodes A ′ and E ′ from the node D ′, and performs processing from analysis to group selection and storage of the selected network group information for the received network group information ( Steps S502 ′ to S504 ′). In this case, the number of hops is all the same 3, but since the number of hops is smaller at the time of the selection process (step S503) (hop number 1), the node C ′ continues to select the group A ′. To do.

  The node F ′ receives the network group information related to the representative node A ′ from the node D ′, and performs processing from analysis to selection of the group and storage of the selected network group information for the received network group information (step S502 ′). ~ S504 '). In this case, since the number of hops described in the network group information from the representative node E ′ received earlier is smaller, the node F ′ continues to select the group E ′.

  Note that the representative nodes A 'and E' to which the group network information has been transferred do not perform the above-described series of processes for selecting a group because the own node is the representative node.

  Next, each node that has selected the group notifies the representative node that manages the selected group that the node belongs to the group after a predetermined time from the participation / removal request transmission unit 405 ′ ( Step S506). For example, the predetermined time may be set as a certain time after first receiving the network group information, but is not limited thereto. However, the time is sufficiently longer than the waiting time. As a result, when the node performs the group selection process in a short time, it is possible to avoid wasting network bandwidth by notifying the representative node each time. The network group information transmitted from the node to the representative node is the same as that shown in FIG.

  In addition, when the information on the number of hops is changed due to the network configuration change after the operation is started, and a closer representative node is found, each node receives a representative managing the group to which it belongs from the join / leave request transmission unit 405 ′. A new group may be formed by notifying the node of leaving and notifying the representative node that manages the group that will newly belong to the node.

  The representative node A ′ receives the network group information transmitted from the nodes B ′ and C ′ in the device information collection unit 410 and stores the contents of the network group information in the group configuration management unit 406 ′ (step S 507). Also, the representative node A ′ notifies the received network group information from the nodes B ′ and C ′ from the monitoring group information transmission unit 411 to the upper network management apparatus 100.

  Similarly, the representative node E ′ receives the network group information transmitted from the nodes D ′ and F ′ in the device information collection unit 410, and stores the contents of the network group information in the group configuration management unit 406 ′ (step S507). ). Further, the representative node E ′ notifies the received network group information from the nodes D ′ and F ′ from the monitoring group information transmission unit 411 to the upper network management apparatus 100.

  Thereby, the upper network management apparatus 100 can manage information of the entire network. Also, the representative nodes A ′ and E ′ can perform network layering management based on the stored information.

  For example, when the information is collected or controlled (set) for the node B ′, the upper network management apparatus 100 makes a request to the representative node A ′ of the group A ′ to which the node B ′ belongs. The representative node A ′ that has received the request by the control request receiving unit 412 becomes an operation mode in which information collection or control (setting) is performed on the node B ′ via the monitoring control unit 413.

  As described above, according to the present embodiment, the group management apparatus 300 is not used, and the node 400 ′ representing the network substitutes the function of the group management apparatus 300. As a result, the network can be hierarchized without using the group management apparatus 300, and the management of the network with reduced costs can be realized.

  In addition, although the basic operation | movement which the representative node manages a group was demonstrated, the content demonstrated by Embodiment 2-10 can be applied to this Embodiment, and each embodiment is combined. It is also possible to apply to.

  As described above, the network management system according to the present invention is useful for a system in which the network management apparatus manages the network, and is particularly suitable as a system that can reduce the processing load of the network management apparatus.

DESCRIPTION OF SYMBOLS 1, 2 Group management apparatus 100 Host network management apparatus 200 Management network 300 Group management apparatus 301 Group management information generation part 302 Device information collection part 303 Group structure management part 304 Monitoring group information transmission part 305 Control request reception part 306 Monitoring control part 400 , 400 ', A, A', B, B ', C, C', D, D ', E, E', F, F 'Nodes 401, 401' Management information analysis unit 402, 402 'Group selection unit 403 403 ′ Management information transfer unit 404 404 ′ Adjacency analysis unit 405 405 ′ Join / leave request transmission unit 406 406 ′ Group information management unit 407 407 ′ Device information control unit 408 408 ′ Device information management unit 409 409 ′ group management device status confirmation unit 410 device information collection unit 411 monitoring group information transmission unit 412 Control request receiving unit 413 Monitoring control unit

Claims (20)

A network management system in which a group management device monitors nodes in a group and a host network management device that manages and manages the entire network manages the nodes via the group management device,
The group management device is
Group management information generating means for generating and transmitting network group information that can describe information on the own device, the number of hops, and information on the transfer source node, which is determination information for group formation to the node,
When a participation notification for notifying participation in a group managed by the own device is received, a managed node is identified based on the participation notification, and device information and adjacency information managed by the managed node are collected. Device information collection means to
Group configuration management means for storing and managing device information and adjacency information collected by the device information collection means;
With
The node is
Management information analysis means for analyzing the received network group information;
Based on the analysis result by the management information analysis means, a group selection means for selecting a group under management of the group management device with a small number of hops,
Participation leaving request transmission means for transmitting a participation notification to the group selected by the group selection means,
Adjacency analysis means for analyzing the adjacency relationship of the own node from the information of the transfer source node described in the received network group information;
Information management means for managing device information of the own node, formed group information, and adjacency information which is an analysis result of the adjacency analysis means;
In response to an acquisition request from the group management device, device information control means for notifying device information and adjacency information managed by the own node;
Management information transfer means for transferring network group information in which information on the number of hops and transfer source node is rewritten to adjacent nodes,
A network management system comprising: When the group management information generating means of the group management device further describes the transmission time of the information in the network group information,
When the number of hops described in the network group information received from a plurality of group management devices is the same, the group selection unit of the node determines the communication time from the transmission time described in the network group information and the reception time of the information. And select the group of the group management device that transmitted the network group information with the shortest communication time,
The network management system according to claim 1. When the group management information generating unit of the group management device further describes the presence / absence of a redundant configuration in its own device in the network group information,
The group selection unit of the node receives network group information from a plurality of group management devices, and when performing reliable communication in the own node, the group of the group management device that has transmitted the network group information with redundancy Select
The network management system according to claim 1. When the group management information generating means of the group management device further describes the number of nodes managed by the own device in the network group information,
When the number of hops described in the network group information received from a plurality of group management devices is the same, the group selection unit of the node is configured to transmit the network group information indicating the smallest number of nodes. Select a group,
The network management system according to claim 1. The node further comprises:
Group management device status confirmation means for confirming the status of the group management device;
With
When the group selection unit of the node receives network group information from a plurality of group management devices and the number of hops from each group management device is the same,
The group management device status confirmation means confirms the response time with each group management device,
The group selection unit selects a group of the group management device with the shortest response time based on the confirmation result of the group management device state confirmation unit;
The network management system according to claim 1. The node further comprises:
Group management device status confirmation means for confirming the status of the group management device;
With
When the group selection unit of the node receives network group information from a plurality of group management devices and the number of hops from each group management device is the same,
The group management device status confirmation means confirms the load of each group management device,
The group selection unit selects a group of group management devices having the most processing capacity based on the confirmation result of the group management device state confirmation unit;
The network management system according to claim 1. The node further comprises:
Group management device status confirmation means for confirming the status of the group management device;
With
When the group selection unit of the node receives network group information from a plurality of group management devices and the number of hops from each group management device is the same,
The group management device status confirmation means confirms the performance of each group management device,
The group selection means selects a group of the most sophisticated group management device based on the confirmation result of the group management device status confirmation means;
The network management system according to claim 1. In the node,
When the group selection unit receives network group information from a plurality of group management devices, selects a group to participate and an alternative group to participate when a failure occurs in the group management device that manages the group to participate,
The information management means stores information on all selected groups,
For the group management device that manages the selected group, the participation / withdrawal request transmission means notifies the group management device that manages the participating group, and other group for the group management device that manages the alternative group. Inform them that they will participate,
In the group management device,
The device information collection unit identifies a management target node based on a notification from the node, acquires information managed by the management target node for all the notified nodes, and acquires the acquired information as the network configuration management unit To manage the nodes in the group,
The network management system according to claim 1, wherein: When the group management information generating means of the group management device further sets an item that describes group information to which the node that transfers the information belongs, in the network group information,
When the received network group information passes through another node, the group selection unit of the node is a group management device that belongs to the other node that has directly transmitted to the own node and the group management device that is the transmission source of the network group information Select a group that matches the group managed by
The management information transfer means further transfers network group information in which the belonging group information is rewritten based on the group selected by the own node to the adjacent node.
The network management system according to claim 1. The group management device further includes:
Monitoring group information transmitting means for notifying the higher-level network management device of device information and adjacency information of nodes stored and managed by the group configuration management means;
Control request accepting means for accepting a control request from the upper network management device to a node in the group managed by the own device;
Monitoring control means for executing the requested control on the target node in the group according to the control request;
The network management system according to any one of claims 1 to 9, further comprising: When the device information control means of the node further notifies the group management device of alarm and event notification information,
In the group management device, the device information collection unit receives alarm and event notification information from a managed node, the group configuration management unit stores and manages alarm and event information, and the monitoring group information transmission unit , To notify the host network management device alarm and event notification information of the node stored and managed by the group configuration management means,
The network management system according to claim 10. A network management system in which a representative node, which is one of the nodes constituting a group, monitors other nodes in the group, and a host network management device that operates and manages the entire network manages the nodes via the representative node. And
The node is
When operating as a representative node, it generates and sends network group information that can describe information about its own node, the number of hops, and the information of the transfer source node, which is judgment information for group formation, to other nodes In addition, when operating as a node other than the representative node, management information transfer means for rewriting the received network group information, rewriting the information of the number of hops and the transfer source node to the adjacent node,
Management information analysis means for analyzing the received network group information;
Based on the analysis result by the management information analysis means, a group selection means for selecting a group under management of a representative node with a small number of hops,
Participation leaving request transmission means for transmitting a participation notification to the group selected by the group selection means,
Adjacency analysis means for analyzing the adjacency relationship of the own node from the information of the transfer source node described in the received network group information;
Information management means for managing device information of the own node, formed group information, and adjacency information which is an analysis result of the adjacency analysis means;
In response to an acquisition request from the representative node, device information control means for notifying device information and adjacency information managed by the own node;
A device information collection unit that identifies a managed node based on the participation notification and collects device information and adjacency information managed by the managed node when receiving a participation notification from another node;
Group configuration management means for storing and managing device information and adjacency information collected by the device information collection means;
A network management system comprising: The node further comprises:
Representative node state confirmation means for confirming the state of the representative node;
With
When the group selection means of a node other than the representative node receives network group information from a plurality of representative nodes and the number of hops from each representative node is the same,
The representative node state confirmation means confirms the response time with each representative node,
The group selection means selects a group of representative nodes with the shortest response time based on the confirmation result of the representative node state confirmation means;
The network management system according to claim 12. The node further comprises:
Representative node state confirmation means for confirming the state of the representative node;
With
When the group selection means of a node other than the representative node receives network group information from a plurality of representative nodes and the number of hops from each representative node is the same,
The representative node state confirmation means confirms the load of each representative node,
The group selection means selects a group of representative nodes having the most processing capacity based on the confirmation result of the representative node state confirmation means;
The network management system according to claim 12. The node further comprises:
Representative node state confirmation means for confirming the state of the representative node;
With
When the group selection means of a node other than the representative node receives network group information from a plurality of representative nodes and the number of hops from each representative node is the same,
The representative node state confirmation means confirms the performance of each representative node,
The group selection means selects a group of representative nodes with the highest performance based on the confirmation result of the representative node state confirmation means;
The network management system according to claim 12. The node further comprises:
Monitoring group information transmitting means for notifying the higher-level network management apparatus of device information and adjacency information of other nodes stored and managed by the group configuration management means;
A control request receiving means for receiving a control request from the higher-level network management device to a node in the group managed by the own node;
Monitoring control means for executing the requested control on the target node in the group according to the control request;
The network management system according to any one of claims 12 to 15, further comprising: When the device information control means of a node other than the representative node further notifies the representative node of alarm and event notification information,
In the representative node, the device information collection unit receives alarm and event notification information from a managed node, the group configuration management unit stores and manages alarm and event information, and the monitoring group information transmission unit includes: Notifying the higher-level network management device of node alarm and event notification information stored and managed by the group configuration management means,
The network management system according to claim 16. A network management method in which a group management device monitors nodes in a group, and a host network management device that operates and manages the entire network manages the nodes via the group management device,
Network group information generation in which the group management device generates and transmits network group information that can describe information on the own device, the number of hops, and information on the transfer source node, which is determination information for group formation to the node Steps,
An analysis step in which the node analyzes the received network group information and extracts information on a group management device, the number of hops, and a transfer source node;
A group selection step in which the node selects a group under management of a group management device with a small number of hops based on the analysis result of the analysis step;
An information storage step in which the node stores the device information of the node itself, the formed group information, and the adjacent relationship information;
A participation notification step in which the node transmits a notification of participation in the group to a group management device that manages the group selected in the group selection step;
The network group information transfer step in which the node rewrites the received network group information, rewrites the information of the hop number and the transfer source node to the adjacent node,
A node information acquisition step in which the group management device specifies a management target node based on the received participation notification, acquires and stores device information and adjacency information managed by the management target node;
A network management method comprising: A network management method in which a representative node, which is one of the nodes constituting a group, monitors other nodes in the group, and a host network management device that operates and manages the entire network manages the nodes via the representative node. And
A network group in which the representative node generates and transmits network group information that can describe information on its own node, the number of hops, and information on the transfer source node, which is determination information for forming a group, to other nodes An information generation step;
An analysis step in which the node analyzes the received network group information and extracts information on the representative node, the number of hops, and the transfer source node;
A group selection step in which the node selects a group under management of a representative node with a small number of hops based on the analysis result of the analysis step;
An information storage step in which the node stores the device information of the node itself, the formed group information, and the adjacent relationship information;
A participation notification step in which the node transmits a notification of participation in the group to a representative node that manages the group selected in the group selection step;
The network group information transfer step in which the node rewrites the received network group information, rewrites the information of the hop number and the transfer source node to the adjacent node,
A node information acquisition step in which the representative node specifies a management target node based on the received participation notification, acquires and stores device information and adjacency information managed by the management target node;
A network management method comprising: further,
An information notification step of notifying the host network management device of the information acquired and stored from the managed node;
A control request receiving step for receiving a control request from the higher-level network management device to a managed node;
A control step of executing the requested control on the managed node according to the control request;
The network management method according to claim 18 or 19, characterized by comprising:

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