KR102572533B1 - Underwater network management system and method for operating thereof - Google Patents

Abstract

An underwater network management system according to an aspect of the present disclosure includes a manager corresponding to a management station, and a plurality of agents connected to the manager and corresponding to a gateway and a plurality of underwater devices, the manager And each of the plurality of agents includes an underwater management information base including a plurality of management target objects for management of an underwater network and the plurality of underwater devices, and the manager includes management provided from the plurality of agents. Based on the information included in the target object, an operation for monitoring and managing the state of the underwater network and the plurality of underwater devices is controlled.

Description

Underwater network management system and its operation method {UNDERWATER NETWORK MANAGEMENT SYSTEM AND METHOD FOR OPERATING THEREOF}

The technical idea of the present disclosure relates to an underwater network management system and an operating method thereof.

Water covers about 70% of the Earth's surface. Recently, new technologies related to underwater ecosystem investigation, resource exploration, contaminant and pollution level measurement, monitoring such as weather observation, and underwater data collection for the same have emerged.

In an underwater network management system for managing an underwater network and underwater devices, systematic management of various information such as the underwater data may be required. However, the underwater environment has different characteristics from the terrestrial environment, and resource availability of devices used underwater may be significantly different from resource availability of devices used on land. In addition, since the management information base (MIB) of the terrestrial network has a large number of managed objects (MOs), it is difficult to apply them to the underwater network as it is.

1. Republic of Korea Patent Publication No. 10-2010-0077707 (published on July 8, 2010)

One problem to be solved by the present invention is to provide an underwater network management system in which an underwater management information base (underwater-MIB (u-MIB)) for managing an underwater network and underwater devices is implemented.

One problem to be solved by the present invention is to provide an underwater network management system capable of minimizing reliability degradation due to changes in an underwater communication environment when transmitting and receiving underwater management information.

In order to achieve the above object, an underwater network management system according to an aspect according to the technical idea of the present disclosure is connected to a manager corresponding to a management station and the manager, and a gateway and a plurality of underwater devices Includes a plurality of agents corresponding to, wherein the manager and each of the plurality of agents includes an underwater management information base including a plurality of management target objects for management of an underwater network and the plurality of underwater devices, wherein the The manager controls an operation for monitoring and managing the state of the underwater network and the plurality of underwater devices based on information included in the management target object provided from the plurality of agents.

According to an embodiment, each of the plurality of agents sends a response message including at least one of a plurality of management target objects included in the underwater management information base to the manager in response to a request message transmitted from the manager. or, in response to an event occurring in a corresponding gateway or underwater device, a trap message including at least one management target object related to the event may be transmitted to the manager.

According to an embodiment, the plurality of agents include a proxy agent corresponding to the gateway, a master agent corresponding to an underwater device connected to the proxy agent among the plurality of underwater devices, and the and a sub agent corresponding to an underwater device connected to the master agent, wherein the proxy agent transfers the request message received from the manager to the master agent, and the master agent transmits the request message to the sub agent. agent, receives a first response message including at least one first management target object related to the request message from the subagent, and includes at least one first management target object included in the received first response message , and a second response message including at least one second managed object related to the request message among managed objects of the master agent to the proxy agent, wherein the proxy agent transmits the second response message received from the master agent. 2 A third response message including at least one first management target object and at least one second management target object included in the response message may be transmitted to the manager.

According to an embodiment, the plurality of agents include a proxy agent corresponding to the gateway and a plurality of sub-agents corresponding to the plurality of underwater devices, and the proxy agent corresponds to the plurality of sub-agents. and a first temporary management information base corresponding to the first subagent, based on at least one management target object included in a message received from a first subagent among the plurality of subagents. You can update the management information base.

According to an embodiment, the proxy agent may further include a log recorder for recording a time when a message is received or a time when a temporary management information base is updated for each of the plurality of sub agents.

According to an embodiment, the proxy agent receives the request message from the manager, and based on whether communication is possible with the first subagent among the plurality of subagents, the first subagent or the first subagent At least one managed object related to the request message may be obtained from a temporary management information base, and a response message including the acquired at least one managed object may be transmitted to the manager.

According to an embodiment, the proxy agent obtains at least one management target object related to the request message from the first subagent when communication with the first subagent is possible, and communicates with the first subagent. If impossible, at least one management target object related to the request message may be obtained from the first temporary management information base.

According to an embodiment, the proxy agent stores the request message when communication with the first subagent is impossible, and when a predetermined time elapses or when communication with the first subagent is detected, the request message may be transmitted to the first subagent, at least one management target object related to the request message may be received from the first subagent, and a response message including the received at least one management target object may be transmitted to the manager. there is.

According to an embodiment, the proxy agent may update the first temporary management information base based on the at least one management target object received from the first subagent.

An operating method of an underwater network management system according to an aspect of the present disclosure includes receiving, by a gateway included in the underwater network management system, a request message from a management station; receiving a response message including information related to the request message from at least one of a plurality of underwater devices connected to the gateway; and transmitting a response message including information included in at least one received response message to the management station, wherein information related to the request message is stored in an underwater management information base of each of the plurality of underwater devices. It may correspond to at least one management target object related to the request message among a plurality of included management target objects.

The underwater network management system according to the technical concept of the present disclosure can more systematically manage information required for managing an underwater network by using an underwater management information base that is optimized and lightweight for the underwater network.

In addition, the underwater network management system implements a plurality of temporary management information bases corresponding to a plurality of sub-agents in a proxy agent corresponding to a gateway, thereby minimizing information transmission delay to a manager due to a decrease in connectivity of underwater devices in an underwater network. can do.

Effects according to the technical idea of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

A brief description of each figure is provided in order to more fully understand the figures cited in this disclosure.
1 is an exemplary conceptual diagram of an underwater communication system to which an underwater network management system of the present disclosure is applied.
2 is a diagram schematically showing the configuration of an underwater network management system according to an exemplary embodiment of the present disclosure.
3 is a diagram showing the underwater network management system shown in FIG. 2 in more detail.
4 to 8 are diagrams showing specific configurations of an underwater management information base according to embodiments of the present disclosure.
9 is a conceptual diagram illustrating an operation of obtaining and managing information of underwater devices by an underwater network management system according to an exemplary embodiment of the present disclosure.
10 is a conceptual diagram illustrating an operation of acquiring and managing information of underwater devices by an underwater network management system according to an exemplary embodiment of the present disclosure.
FIG. 11 is a ladder diagram for explaining a specific example related to an operation of transmitting and receiving management information of the underwater network management system according to the embodiment of FIG. 10 .

Exemplary embodiments according to the technical spirit of the present disclosure are provided to more completely explain the technical spirit of the present disclosure to those skilled in the art, and the following embodiments are modified in various forms. It may be, and the scope of the technical spirit of the present disclosure is not limited to the following embodiments. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the spirit of the invention to those skilled in the art.

Although terms such as first and second are used in this disclosure to describe various members, regions, layers, regions and/or components, these members, parts, regions, layers, regions and/or components do not refer to these terms. It is self-evident that it should not be limited by These terms do not imply any particular order, top or bottom, or superiority or inferiority, and are used only to distinguish one member, region, region, or component from another member, region, region, or component. Accordingly, a first member, region, region, or component to be described in detail below may refer to a second member, region, region, or component without departing from the teachings of the technical concept of the present disclosure. For example, a first element may be termed a second element, and similarly, the second element may be termed a first element, without departing from the scope of the present disclosure.

Unless defined otherwise, all terms used herein, including technical terms and scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which the concepts of the present disclosure belong. In addition, commonly used terms as defined in the dictionary should be interpreted as having a meaning consistent with what they mean in the context of the technology to which they relate, and in an overly formal sense unless explicitly defined herein. will not be interpreted.

When an embodiment can be implemented differently, the order of specific processes may be performed differently from the order described. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order reverse to the order described.

The term 'and/or' as used herein includes each and every combination of one or more of the recited elements.

Hereinafter, embodiments according to the technical idea of the present disclosure will be described in detail with reference to the accompanying drawings.

1 is an exemplary conceptual diagram of an underwater communication system to which an underwater network management system of the present disclosure is applied.

Referring to FIG. 1, the underwater communication system includes a management station (or server) 1 on the ground, a plurality of wireless communication devices (or nodes) 11a, 11b, 12a, 12b, 13, 14a, 14b; Hereinafter collectively referred to as '10'), and surface gateways 20a and 20b present between the management station 1 and the wireless communication device 10 (hereinafter collectively referred to as '20'). there is.

The management station 1 may be connected to the gateways 20a and 20b and the underwater wireless communication device 10 through a terrestrial base station antenna or a satellite. The management station 1 may perform overall operations related to management of data, resources, and devices 10 and 20 of the underwater communication system. For example, the management station 1 may store or process various data provided from the underwater wireless communication devices 10 to provide information for use in various fields. In addition, the management station 1 may perform operations such as checking and managing states of the devices 10 and 20 included in the underwater communication system. For example, the management station 1 may be implemented as a server or the like, but is not limited thereto.

A gateway 20 is coupled between the management station 1 and the wireless communication devices 10 to enable data exchange between the management station 1 and the wireless communication devices 10 . To this end, the gateway 20 may support various well-known wireless communication methods for wireless communication with the management station 1 (eg, mobile communication methods such as LTE and 5G, satellite communication methods, etc.), and a wireless communication device ( 10) for underwater wireless communication (eg, sound wave communication, visible light communication, infrared communication, low frequency communication, magnetic field communication, etc.) can be supported. Depending on the embodiment, the gateway 20 may be implemented as a communication device installed in the ships 30a and 30b.

The wireless communication devices 10 include various devices deployed or used underwater, and each of the devices may support an underwater wireless communication method. For example, the wireless communication devices 10 include a plurality of sensor nodes 11a and 11b that sense data for measuring and monitoring an underwater environment, underwater vehicles 12a and 12b, and autonomous underwater vehicles (AUVs) 13 ), and/or communication devices 14a and 14b mounted on the diver's equipment or carried by the diver. These wireless communication devices 10 may form a network by being directly or indirectly connected using an underwater wireless communication method.

The wireless communication devices 10 may transmit various data obtained according to the operation of the device, such as data related to the underwater environment, to the management station 1 through the gateway 20 . Hereinafter, for convenience of explanation, the wireless communication device 10 is referred to as an underwater device 10, but this does not limit the wireless communication device 10 to being used only underwater.

Meanwhile, a network management system (NMS) for management of a communication network and devices constituting the communication network may be implemented in the communication system. Even in the case of the underwater communication system shown in FIG. 1 , an underwater network management system (underwater NMS (U-NMS)) for managing the underwater network and devices 10 and 20 may be implemented. The underwater network management system may be implemented in hardware, software, or a combination thereof.

However, the characteristics of the underwater environment are different from those of the terrestrial environment in which a general communication system is provided, and resource availability (power supply, etc.) of the underwater device 10 may be significantly different from resource availability of the communication device used on land. In addition, the management information base (MIB) of the terrestrial network has numerous managed objects (MOs). Therefore, it may be inefficient to apply the network management system and management information base of the conventional general communication system as it is to the underwater communication system.

According to embodiments of the present disclosure, the underwater network management system can more systematically manage information for the operation of the underwater network using an underwater management information base (underwater-MIB (u-MIB)) optimized for the underwater network. there is. Hereinafter, various embodiments related to the underwater network management system and the underwater management information base of the present disclosure will be described with reference to FIGS. 2 to 8 .

2 is a diagram schematically showing the configuration of an underwater network management system according to an exemplary embodiment of the present disclosure. 3 is a diagram showing the underwater network management system shown in FIG. 2 in more detail.

Referring to FIG. 2 , the underwater network management system 100 may include a manager 110 and an agent 120. Each of the manager 110 and agent 120 may be implemented as hardware, software, or a combination thereof, but is not limited thereto.

For example, the manager 110 may manage devices 10 and 20 included in the underwater network and/or control overall functions of the underwater network. The manager 110 may be implemented as the management station 1 or a device included in the management station 1 , or may include a program (such as the management application 310 ) installed in the management station 1 . The manager 110 may monitor or control the state of the underwater network or devices 10 and 20 based on various management information provided from the agent 120 .

The agent 120 may be included in the aforementioned underwater device 10 and gateway 20. For example, the underwater device 10 and the gateway 20 may include a device 320 having a processor (CPU, etc.), memory, an operating system (OS), an agent, and other components. The agent 120 may provide various information generated or obtained from the underwater device 10 and/or the gateway 20 to the manager 110 .

Each of the manager 110 and agent 120 may include underwater management information bases (u-MIBs) 130 and 140 . The underwater management information bases 130 and 140 may correspond to databases designed for management of components included in the underwater network management system. The underwater management information bases 130 and 140 may correspond to a set of managed objects (MOs) using a structured format 150 to define names and entities suitable for the underwater network management system 100. Each of the managed objects (MOs) may include various management information related to the underwater network and/or the devices 10 and 20 included in the underwater network.

As described above, the conventional management information base of a general terrestrial network maintains an excessive number of managed objects (MOs), and thus may not be suitable for application to an underwater network. Accordingly, the underwater management information bases 130 and 140 according to an embodiment of the present disclosure are lightweight databases including only the minimum management target objects (MOs) necessary for managing the underwater network and devices 10 and 20. By being implemented, it enables efficient management of underwater networks. Implementation examples of the underwater management information bases 130 and 140 will be described in more detail with reference to FIGS. 4 to 8 later.

With continued reference to FIGS. 2 and 3 , the manager 110 and the agent 120 may transmit and receive messages and/or information according to a packet exchange format defined by a management protocol 160 . For example, the manager 110 may receive management target objects (MOs) from the agent 120 using a request message (Get Request or Set Request) and manage them. The agent 120 may transmit a response message (Get Response or Set Response) including management target objects (MOs) to the manager 110 in response to the request message. According to an embodiment, when an important event occurs in the corresponding device 10 or 20, the agent 120 sends a trap message (Trap message) including management target objects (MOs) related to the event to the manager 110. ) can be transmitted. For example, the important event may include an increase in temperature, low remaining battery power, insufficient memory space, and the like.

Hereinafter, various embodiments related to the underwater management information bases 130 and 140 and the managed objects (MOs) included therein will be described with reference to FIGS. 4 to 8 .

4 to 8 are diagrams showing specific configurations of an underwater management information base according to embodiments of the present disclosure.

Referring to FIG. 4, the underwater management information bases 130 and 140 are a set of managed objects (MOs) in which underwater network management information is hierarchically structured. It can be organized into networks and underwater devices.

The underwater network section ( u_networks ) can be understood as underwater network information including a plurality of managed objects (MOs) for network connection management between devices 10 and 20 (eg, connectivity check between devices). .

The underwater device section ( u_devices ) includes a plurality of managed objects (MOs) (eg, battery status of underwater devices, etc.) for management of devices (eg, proxy agent, master agent, subagent, etc.) constituting the underwater network. It can be understood as underwater device information including

5 shows an example of a general structure of the underwater management information bases 130 and 140. Referring to FIG. 5, the underwater management information bases 130 and 140 include a plurality of managed objects (MOs), and each of the plurality of managed objects (MOs) is an underwater network section ( u_networks ) or an underwater device section. Can be included in ( u_devices ).

For example, the object to be managed (MO) includes an object name (OBJECT-NAME), a data type (DATA-TYPE), an access right (RIGHT-TO-ACCESS), a status indicator (STATUS-INDICATOR), and an object description (OBJECT-DESCRIPTION ) can be defined as The object name represents the name of the object, such as a device name or management information base version, and the data type represents the type of data (eg, integer, string, time, etc.) corresponding to the object name. The access right indicates the right to search for an object (read-write, read-only, etc.), the status indicator indicates whether the object is mandatory (mandatory) or optional (optional), and the object description is a description of the object. (text) can be displayed.

An interface description language may be used to define managed objects (MOs), and a structured format may be used to define the object names and the like.

6 illustrates an example of a management target object included in the underwater network section ( u_networks ) of the underwater management information bases 130 and 140.

Referring to FIG. 6 , information related to network connectivity, packets transmitted and received through the network, and notification according to events occurring in the network may be required for management of the underwater network. Managed objects (MOs) included in the underwater network section may be classified into the connectivity, packet, and notification categories.

Each of Tables 1 to 3 below shows an example of configuration and classification of objects to be managed included in the underwater network section ( u_networks ).

[Table 1]

[Table 2]

[Table 3]

According to the embodiments of Tables 1 to 3, the connectivity category may include information about the type of network, signal strength, connection quality, network activation time, network disconnection time, and the number of devices connected to the network. The packet category may include information such as the total amount of packets received and transmitted through the network, the number of processed requests or responses, and the number of managed objects searched or changed according to the requests or responses. The notification category may include information included in a trap message when an event occurs, such as communication connection failure with a specific device or authentication failure of a specific device.

The underwater network management system 100 acquires various information for managing the underwater network through the managed objects (MOs) of the underwater network section ( u_networks ) described above, and connects or maintains the underwater network based on the acquired information. management operations such as

7 illustrates an example of a management target object included in the underwater device section ( u_devices ) of the underwater management information bases 130 and 140 .

Referring to FIG. 7 , in order to manage underwater devices constituting an underwater network, it may be necessary to grasp information or status of a device, battery, memory, temperature, location, connectivity, message (packet), notification, and the like. Based on this, the managed objects (MOs) included in the underwater device section ( u_devices ) include device information, device status, battery information, battery status, memory information, memory status, temperature status, location information, connection information, and message information. , notification information, and notification state categories, respectively.

Each of Table 4 to Table below shows an example of configuration and category-specific classification of objects to be managed included in the underwater device section ( u_devices ).

[Table 4]

[Table 5]

[Table 6]

The underwater network management system 100 obtains various information for management of underwater devices through the managed objects (MOs) of the above-described underwater device section ( u_devices ), and monitors the status of the underwater devices based on the obtained information. And, based on the monitored state, it is possible to perform control and management operations for underwater devices.

8 illustrates examples of managed objects (MOs) for providing information on events occurring in an underwater network or an underwater device to the manager 110.

Referring to FIG. 8 , when an important event (network or device error, etc.) occurs in an underwater network or underwater device, the agent 120 sends a trap message including managed objects (MOs) representing information about the occurred event. (or packet) may be transmitted to the manager 110. Management target objects (MOs) representing information on the event may be included in each of an underwater network section ( u_networks ) and an underwater device section ( u_devices ). For example, the management subject objects (MOs) may indicate information about serial numbers of devices where an event occurs, the name of a device that transmits a trap message, the time when an event occurred, and the cause. The manager 110 recognizes events occurring in the underwater network or underwater device based on the managed objects (MOs) included in the trap message received from the agent 120, and controls the underwater network or underwater device according to the recognition result. and management.

According to the embodiments of FIGS. 4 to 8, the underwater network management system 10 efficiently manages underwater networks and underwater devices through an underwater information management base (u-MIB) implemented in a form optimized for the characteristics of underwater networks. can be performed.

9 to 11, examples of operations in which the underwater network management system 100 performs management of underwater devices according to an underwater information management base will be described in detail.

9 is a conceptual diagram illustrating an operation of obtaining and managing information of underwater devices by an underwater network management system according to an exemplary embodiment of the present disclosure.

Referring to the embodiment of FIG. 9 , the underwater network management system 100 includes a manager 110 and a plurality of agents 120, and the plurality of agents 120 are proxy agents according to the connection relationship between underwater devices. agent 900, a master agent 910, and a sub agent 920. Manager 110 may correspond to management station 1 , and proxy agent 900 may correspond to gateway 20 . The subagent 920 may correspond to an underwater device connected to an end of the underwater network, and the master agent 910 may correspond to an underwater device connected between the proxy agent 900 and the subagent 920 .

The manager 110 obtains information (management target object) included in the underwater management information base of the master agent 910 or the subagent 920 through the proxy agent 900, and based on the obtained information, the master agent ( A state of an underwater device corresponding to 910) or an underwater device corresponding to the subagent 920 may be monitored.

For example, the manager 110 may transmit a request message for information about the connection state of underwater devices to the proxy agent 900 . In response to the received request message, the proxy agent 900 may transmit a request message of connection state information to each of the subordinate connected agents (master agent 910 and/or sub agent 920). In response to the received request message, the master agent 910 and/or the subagent 920 are related to the connection state of the underwater device among managed objects (MOs) included in each underwater management information base 140. A response message including management target objects may be transmitted to the proxy agent 900 . For example, management target objects related to the connection state include information for identifying each underwater device (device name, etc.), state-related information (operating state, battery state, etc.), and/or information about the connection state (connection status). , network type, connection quality, etc.).

The manager 110 may receive a response message including management target objects from the proxy agent 900 and monitor the connection state of underwater devices based on the received response message. In addition, the manager 110 may update the underwater management information base 130 of the manager 110 based on management target objects included in the received response message. Meanwhile, the proxy agent 900 may also update the underwater management information base based on management target objects received from the master agent 910 and/or the subagent 920.

10 is a conceptual diagram illustrating an operation of acquiring and managing information of underwater devices by an underwater network management system according to an exemplary embodiment of the present disclosure.

Referring to FIG. 10 , the underwater network management system 100 may include a manager 110 corresponding to a management station 1 and agents, and the agents are connected to a proxy agent 1000 and the proxy agent 1000. A plurality of sub agents 1010 may be included. For example, the proxy agent 1000 may correspond to the gateway 20, and the subagent 1010 may correspond to each of a plurality of underwater devices.

Similar to the embodiment of FIG. 9 , the manager 110 may transmit to the proxy agent 1000 a message requesting information for management or status monitoring of the underwater network and/or underwater devices. In response to the received request message, the proxy agent 1000 may transmit a request message of the information to at least some subagents 1010 related to the request message among lower connected subagents 1010 . Upon receiving the information from the at least some of the subagents 1010, the proxy agent 1000 may transmit a response message including the received information to the manager 110.

On the other hand, since the degree of change in the underwater environment is greater and unpredictable compared to the terrestrial environment, underwater communication is less reliable than terrestrial communication. Accordingly, when the proxy agent 1000 receives a request message from the manager 110, it may not be normally connected to some of the subagents 1010 depending on the underwater environment. In this case, since the proxy agent 1000 has to wait until information is received from subagents 1010 that are not connected, a response to the manager 110 may be delayed. In addition, due to the subagents 1010 that are not connected, even information received from the subagents 1010 connected to the proxy agent 1000 cannot be immediately transmitted, resulting in inefficiency.

According to an embodiment of the present disclosure, the proxy agent 1000 may include temporary management information bases 1004 corresponding to management information bases of each subagent 1010 . Temporary management information bases 1004 may be included in storage 1002 of proxy agent 1000 .

The proxy agent 1000 including the temporary management information bases 1004 may have a kind of cloud form. Each of the subagents 1010 transmits a response message including information (management target object) to the proxy agent 1000 based on the request message received from the proxy agent 1000, or when a specific event occurs, a related management target A trap message including an object may be transmitted to the proxy agent 1000. The proxy agent 1000 may update a temporary management information base corresponding to a specific subagent by using a management target object included in a response message or trap message from a specific subagent. At this time, the storage 1002 further includes a log recorder 1003 for each of the subagents 1010, and the log recorder 1003 receives a response message or a trap message for each of the subagents 1010. Information on timing (or information on update timing of the temporary management information base) may be recorded.

As the temporary management information base 1004 is implemented, response delay from the proxy agent 1000 to the manager 110 can be minimized. This will be described in more detail with reference to FIG. 11 below.

FIG. 11 is a ladder diagram for explaining a specific example related to an operation of transmitting and receiving management information of the underwater network management system according to the embodiment of FIG. 10 .

Referring to FIG. 11 , the manager 110 corresponding to the management station 1 may request information for management or status monitoring of an underwater network or underwater device (S100). To this end, the manager 110 may transmit a request message (Set Request) to the proxy agent 1000 corresponding to the gateway 20 (S105).

When the request message is received, the proxy agent 1000 may obtain information to be transmitted to the manager 110 based on a communication state, and transmit a response message including the acquired information to the manager 110 .

Although not shown, when underwater communication between the proxy agent 1000 and the subagent 1010 is possible, the proxy agent 1000 transfers a request message to the subagent 1010, and from the subagent 1010 A response message including the above information may be received. The proxy agent 1000 may transmit a response message including the received information to the manager 110 .

Depending on the embodiment, when the communication connection between the proxy agent 1000 and the manager 110 is not smooth, the proxy agent 1000 may wait without transmitting a response message to the manager 110 . The proxy agent 1000 may transmit the response message to the manager 110 after a predetermined waiting time or when it is detected that the communication connection becomes smooth.

Meanwhile, when underwater communication between the proxy agent 1000 and the subagent 1010 is impossible, the proxy agent 1000 may obtain information stored in a temporary underwater management information base (S110).

The state in which underwater communication is impossible means a state in which the connection between devices is disconnected or the communication environment is below a predetermined level (eg, a state in which transmission delay and/or BER (bit error rate) exceeds a threshold). can

For example, among the plurality of subagents 1010, a first subagent can communicate underwater with the proxy agent 1000, and a second subagent cannot communicate underwater with the proxy agent 1000. In this case, the proxy agent 1000 obtains information to be transmitted from the first subagent to the manager 110, and obtains information from a temporary underwater management information base corresponding to the second subagent among temporary underwater management information bases. can do.

The proxy agent 1000 transmits a response message (eg, Set Response) including the received information to the manager 110 (S115), and the manager 110 receives the response message to receive the requested information first. It can (S120).

Meanwhile, the proxy agent 1000 may transmit a request message (eg, Set Request) to the subagent 1010 that has not acquired information using a store-and-forward mechanism (S125 and S130).

As described above, the proxy agent 1000 may acquire information about the second subagent in a state in which underwater communication is impossible from the temporary underwater management information base and transmit the information to the manager 110 . Thereafter, the proxy agent 1000 may store the request message in a memory such as a buffer and transmit the request message to the second subagent after a preset time has elapsed. At this time, if underwater communication between the proxy agent 1000 and the second subagent is still impossible, the proxy agent 1000 may transmit the request message to the second subagent after the predetermined time elapses. .

Depending on the embodiment, the request message may be transmitted not only to the second subagent that has not obtained information, but also to the first subagent that has previously obtained information.

Upon receiving the request message from the proxy agent 1000, the subagent 1010 (eg, the second subagent) acquires information included in the underwater management information base of the subagent 1010, and responds including the obtained information. A message (Set Response) may be transmitted to the proxy agent 1000 (S135, S140).

The proxy agent 1000 may transmit a response message including information received from the subagent 1010 to the manager 110 using a store-and-forward mechanism (S145 and S150).

The proxy agent 1000 may store response messages received from sub agents in a memory such as a buffer according to a store-and-forward mechanism. The proxy agent 1000 may store previously received response messages until response messages are received from all subagents that have transmitted request messages in steps S125 and S130. When response messages are received from all subagents that have transmitted the request message, the proxy agent 1000 may transmit a response message having information included in the received response messages to the manager 110 .

Although not shown, the proxy agent 1000 stores information received from the subagent 1010 in a temporary underwater management information base corresponding to the subagent 1010, so that the temporary underwater management information base and/or the proxy agent ( 1000) may update the underwater management information base. Accordingly, information synchronization may be achieved between the underwater management information base of the proxy agent 1000, the temporary underwater management information base, and the underwater management information base of the subagent.

The manager 110 may secondarily receive information requested according to step S100 by receiving the response message transmitted from the proxy agent 1000 (S155).

According to the secondary reception of the above information, synchronization between the underwater management information base of the manager 110, the underwater management information base of the proxy agent 1000, and the underwater management information base of the subagent 1010 is achieved. can

According to the conventional store-and-forward mechanism, the proxy agent 1000 may not transmit a response message to the manager 110 until all information (data) to be transmitted to the manager 110 is obtained. In this case, the transmission delay of information may be unnecessarily increased, and inefficiency may occur in that the remaining information may not be transmitted due to some unreceived information. In particular, in the case of underwater communication, since the degree of change in the underwater environment is greater than that of the ground, the communication state is unstable compared to that of the ground. Therefore, according to the conventional store-and-forward mechanism, information transmission delay may occur very frequently.

According to the embodiment of FIG. 11 , the proxy agent 1000 primarily transmits a response message including information stored in the temporary management information base to the manager 110 when underwater communication with some subagents is not smooth. And, as the underwater communication with the subagent becomes smooth later, a response message including information obtained may be secondarily transmitted to the manager 110. Accordingly, overall delay when the proxy agent 1000 transmits information to the manager 110 can be minimized.

The above-described present invention can be implemented as computer readable codes in a recording medium on which a program is recorded. A computer-readable recording medium includes all types of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. includes Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (15)

a manager corresponding to the management station; and
Connected to the manager and including a plurality of agents corresponding to a gateway and a plurality of underwater devices,
The manager and each of the plurality of agents,
An underwater management information base (u-MIB) including a plurality of managed objects for management of an underwater network and the plurality of underwater devices,
The manager,
Based on the information included in the management target object provided from the plurality of agents, controlling the operation for monitoring and managing the state of the underwater network and the plurality of underwater devices,
Each of the plurality of agents,
In response to a request message transmitted from the manager, a response message including at least one of a plurality of management target objects included in the underwater management information base is transmitted to the manager,
In response to an event occurring in a corresponding gateway or underwater device, transmitting a trap message including at least one management target object related to the event to the manager;
The plurality of agents,
a proxy agent corresponding to the gateway; and
Including a plurality of sub-agents corresponding to the plurality of underwater devices,
The proxy agent,
a plurality of temporary management information bases corresponding to the plurality of sub agents;
updating a first temporary management information base corresponding to the first subagent based on at least one management target object included in a message received from a first subagent among the plurality of subagents;
Receiving the request message from the manager,
obtaining at least one management target object related to the request message from the first subagent or the first temporary management information base, based on whether communication with the first subagent among the plurality of subagents is possible;
Transmitting a response message including the acquired at least one managed object to the manager,
Underwater network management system.
delete According to claim 1,
The plurality of agents,
a master agent corresponding to an underwater device connected to the proxy agent among the plurality of underwater devices; and
Includes a sub-agent corresponding to an underwater device connected to the master agent;
The proxy agent forwards the request message received from the manager to the master agent;
The master agent transfers the request message to the subagent, receives a first response message including at least one first management target object related to the request message from the subagent, and responds to the received first response message. Transmitting a second response message including at least one included first management target object and at least one second management target object related to the request message among management target objects of the master agent to the proxy agent;
The proxy agent transmits a third response message including at least one first management target object and at least one second management target object included in the second response message received from the master agent to the manager.
Underwater network management system.
delete According to claim 1,
The proxy agent,
Further comprising a log recorder recording a time when a message is received or a time when a temporary management information base is updated for each of the plurality of subagents.
Underwater network management system.
delete According to claim 1,
The proxy agent,
When communication with the first subagent is possible, acquire at least one management target object related to the request message from the first subagent;
obtaining at least one management target object related to the request message from the first temporary management information base when communication with the first subagent is impossible;
Underwater network management system.
According to claim 7,
The proxy agent,
Storing the request message when communication with the first subagent is impossible;
transmits the request message to the first subagent when a predetermined time elapses or when communication with the first subagent is detected;
Receiving at least one management target object related to the request message from the first subagent;
Transmitting a response message including the received at least one managed object to the manager,
Underwater network management system.
According to claim 8,
The proxy agent,
Updating the first temporary management information base based on the at least one management target object received from the first subagent;
Underwater network management system.
In the operating method of the underwater network management system,
Receiving, by a gateway included in the underwater network management system, a request message from a management station;
receiving a response message including information related to the request message from at least one of a plurality of underwater devices connected to the gateway; and
transmitting to the management station a response message including information contained in at least one received response message;
The information related to the request message corresponds to at least one management target object related to the request message among a plurality of management target objects included in an underwater management information base of each of the plurality of underwater devices,
The gateway includes a plurality of temporary management information bases corresponding to the plurality of underwater devices,
Updating a first temporary management information base corresponding to the first underwater device based on at least one management target object included in a message received from a first underwater device among the plurality of underwater devices;
Receiving a response message including information related to the request message from at least one of the plurality of underwater devices, respectively,
Obtaining information related to the request message from the second underwater device or a second temporary management information base corresponding to the second underwater device based on whether communication with a second underwater device among the at least one underwater device is possible Including steps,
method.
delete delete According to claim 10,
obtaining information related to the request message from the second underwater device when communication with the second underwater device is possible; and
Acquiring information related to the request message from the second temporary management information base when communication with the second underwater device is impossible.
method.
According to claim 13,
storing the request message when communication with the second underwater device is impossible;
Transmitting the stored request message to the second underwater device when a predetermined time elapses or communication with the second underwater device is detected;
receiving information related to the request message from the second underwater device; and
Further comprising transmitting a response message containing the received information to the management station.
method.
According to claim 14,
Further comprising updating the second temporary management information base based on information received from the second underwater device.
method.

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