JPH08204736A - Network management system - Google Patents

Abstract

PURPOSE: To improve the response of monitor control communication. CONSTITUTION: The management system is provided with a host network 10 having a management equipment 11, a sub-system 20 having a managed equipment 21, and a gateway 30 to acquire desired data from the managed equipment under the control when a data request from the host network to the sub-system under the control is received and to return the data to the host network. In the network management system, the gateway is provided with a storage means 30d storing returned data to the host network and a retrieval means 30e retrieving whether or not the request data from the host network are stored in the storage means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a LAN (Local Area N
The present invention relates to a network management system in which a subsystem is managed from a higher level network such as etwork) or WAN (Wide Area Network) via a gateway.

[0002]

2. Description of the Related Art In recent years, HA (Home Automation) equipment and B
Various monitoring and control devices have come to be installed, which are called A (Building Automation) devices. In addition, the social infrastructure and technology for information and communication networks have been remarkably improved, and the monitoring and control devices that have been installed independently in each building or home control the area, for example, by the information and communication network. Connected to the management device of the service management center, it has become possible to enjoy professional and sophisticated 24-hour services, not only in buildings but also in ordinary households, 24 hours a day, 7 days a week. Moreover, in order to enjoy more specialized and advanced services organically, service management centers have been established for each field, and service management centers for each field have been connected by a higher-level network. .

FIG. 8 is a system configuration diagram showing a conventional network management system as described above. In FIG. 8, reference numeral 10 is a higher-level network, 11 is a management device for each service management center connected to the higher-level network 10, 20 is a subsystem for each individual building or home, 21
Is a managed device for each BA or HA that constitutes the subsystem 20, and 30 is the upper network 10 and the subsystem 20.
1 shows a gateway for communicatively interconnecting and.

Managed device 2 constituting subsystem 20
Reference numeral 1 denotes a subsystem transmission / reception unit 21a for exchanging data with the gateway 30, and a signal processing unit 21 for analyzing a message of a communication packet transmitted by the gateway 30.
b and a database unit 21c that stores data for each management item, and normally performs low-speed communication of several kilobytes to several tens of kilobytes per second with a data length of several bytes to several tens of bytes per communication packet. There is.

The gateway 30 transmits / receives data to / from the management device 11, an upper network transmission / reception unit 30a, a signal processing unit 30b for performing various processes such as protocol conversion and packet length adjustment, and data transmission / reception to / from the managed device 21. And a subsystem transmission / reception unit 30c for performing.

The conventional network management system as described above operates as follows. That is, the gateway 3
0 indicates that when the upper network transmitting / receiving unit 30a receives a data request for a certain management item (whether a fire has occurred, the air-conditioning equipment start / stop status, crime prevention abnormality, etc.) from the upper network 10, the signal processing unit 30b outputs the data It is checked whether or not the request is addressed to the subsystem 20 under its own jurisdiction, and if it is addressed to the subsystem 20 under its own jurisdiction, the subsystem transceiver unit 30c sends the subsystem 2 to the subsystem 2.
The data request is transmitted to 0.

If the managed device 21 receives the data request at the subsystem transmitting / receiving unit 21a and the signal processing unit 21b determines that the data request is addressed to itself,
The data of the management item corresponding to the data request is searched from the database unit 21c, and the searched data is returned from the subsystem transmitting / receiving unit 21a to the subsystem transmitting / receiving unit 30c of the gateway 30 via the signal processing unit 21b.

When the requested data is returned to the subsystem 20, the gateway 30 executes protocol conversion and packet length adjustment of the returned data, and performs the protocol conversion and packet length adjustment. The returned data is returned to the management device 11 of the upper network 10 that made the data request.

[0009]

However, in the conventional network management system as described above, the gateway is under the jurisdiction every time a data request is made from the supervising network management device to the subsystem under its control. A data request must be sent to a managed device in the subsystem below, and the managed device must respond to the data request each time. Further, even when different management devices of the upper network request the same data at substantially the same time, the managed device must repeat the same response operation one by one. Therefore, the signal processing unit of the managed device takes time to reply to the gateway and becomes burdensome, and various electric equipment devices (fire sensors, etc.) monitored and controlled by the managed device in the subsystem are loaded.
There has been a problem that the response (access frequency) of the managed device to the security sensor, the start / stop monitoring control terminal device, etc. is extremely slow and bad.

The present invention has been made to solve the above problems, and an object of the present invention is to provide excellent network management capable of improving the response of monitoring / controlling communication in a subsystem. To provide a system.

[0011]

In order to solve the above problems, the present invention provides a host network having a management device,
In a network management system comprising a subsystem having a managed device, and a gateway for obtaining desired data from the managed device under the jurisdiction and returning it to the upper network if a data request is made from the superordinate network to the subordinate subsystem In the invention of item 1,
The gateway includes a storage unit for storing reply data returned to the upper network, and a search unit for searching whether or not the request data from the upper network is stored in the storage unit. To do.

According to another aspect of the present invention, the gateway stores storage means for storing reply data returned to the host network and whether or not request data from the host network is stored in the storage means. It is characterized in that it comprises a searching means for searching and an erasing means for erasing the predetermined data stored in the storage means.

According to another aspect of the present invention, the gateway stores storage means for storing reply data returned to the host network, and whether or not request data from the host network is stored in the storage means. It is characterized by comprising a searching means for searching and an erasing means for erasing the predetermined data stored in the storage means on the basis of an erasing request from the upper network.

According to another aspect of the present invention, the gateway stores storage means for storing reply data returned to the host network, and whether or not request data from the host network is stored in the storage means. It is characterized by comprising a searching means for searching, a frequency detecting means for detecting the request frequency from the upper network for each requested data, and an erasing means for erasing from the data having a low request frequency stored in the storage means. And

According to another aspect of the present invention, the gateway includes a database for preliminarily collecting data from a subsystem under its jurisdiction for storing data predicted to be requested by the upper network, and storing the data from the upper network. And a search means for searching whether or not the requested data is stored in the database.

According to another aspect of the present invention, the gateway includes a database for preliminarily collecting and storing data instructed from the host network from a subsystem under its control, and request data from the host network. And a search means for searching whether or not the data is stored in the database.

According to another aspect of the invention, the gateway has a database for preliminarily collecting and storing data instructed by the upper network from a subsystem under its control, and request data from the upper network. It is characterized by comprising a searching means for searching whether or not it is stored in the database, and a database updating means for updating an item content of the database in response to an instruction from a host network.

[0018]

With the above construction, in the invention according to claim 1, when the gateway receives a data request from the host network, the search means stores the corresponding request data in the storage means. If the corresponding data is stored, it is possible to return the corresponding data stored in the storage means to the higher-level network without burdening the managed device, if the corresponding data is stored. If the requested data is not stored in the storage means, the data can be requested from the subsystem and acquired, the acquired data can be returned to the host network, and the acquired data can be stored and stored in the storage means. .

According to the invention of claim 2, claim 1
In addition to the operation of the invention described above, the data stored in the storage means can be erased when it becomes unfit for the current situation.

According to the invention of claim 3, claim 2
In addition to the operation of the invention described above, the data stored in the storage means can be erased from the host network.

According to the invention of claim 4, claim 1
In addition to the operation of the invention described above, the data stored in the storage means is deleted while leaving the data frequently requested from the higher level network, so that only the data optimum for reducing the load on the managed device of the subsystem is obtained. Can be stored and stored in the storage means.

According to the invention of claim 5, the gateway can collect the data expected to be requested from the higher level network from the subsystem under its control in advance and store it in the database. When a data request is received from the host network, the search means searches for whether the corresponding data is stored in the database, and if the corresponding data exists, without burdening the managed device. The corresponding data stored in the database can be returned to the upper network.

According to the invention of claim 6, claim 5
In addition to the effect of the described invention, the data to be stored in the database can be determined by an instruction from the host network.

According to the invention of claim 7, claim 6 is provided.
In addition to the operation of the invention described above, the item contents of the data stored in the database can be arbitrarily updated by an instruction from the host network.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a network management system according to the present invention will be described below with reference to FIGS. 1 and 2, a second embodiment will be based on FIG. 3, and a third embodiment will be based on FIG. The fourth embodiment will be described in detail with reference to FIGS. 5 and 6, and the fifth embodiment with reference to FIG.

[First Embodiment] FIG. 1 is a system configuration diagram showing a network management system, and FIG. 2 is an operation diagram for explaining a main operation of the network management system. In addition,
Since the same reference numerals are given to the same portions as the portions described in the related art, detailed description of the same portions will be omitted.

The characteristic of the network management system shown in FIG. 1 is that it is different from the conventional one.
However, it is configured to include a buffer unit 30d corresponding to a storage unit and a buffer search unit 30e corresponding to a search unit. As long as the buffer unit 30d has a sufficient storage capacity,
Although the data received by the subsystem transmitting / receiving unit 30c is sequentially stored, when the storage capacity is exhausted, the oldest storage data is sequentially volatilized. Buffer search unit 30e
Retrieves and reads the data stored in the buffer unit 30d.

The network management system shown in FIG.
It works as follows. That is, the gateway 30
When the network management system is started up, the buffer unit 30d is cleared as an initialization process, and then a standby state is set for a transmission packet from the management device 11 of the upper network 10. The transmission packet from the management device 11 may be, for example, “request communication of start / stop status of each air conditioner in No. 1 subsystem 20”, “type for each address of fire sensor in No. 2 subsystem 20 (heat wire / smoke). There are various transmission packets relating to monitoring and control, such as "request for contact (analog / digital type)", "stop the air conditioner at address 1 and address 3 in subsystem 1".

Now, for example, when the host network transmission / reception unit 30a of the gateway 30 receives a transmission packet to the effect that "a contact for the type of each fire sensor address in the second subsystem 20 is requested" is received, the signal processing unit of the gateway 30. 30b determines whether the transmission packet is addressed to the subsystem 20 under its control. The buffer search unit 30e of the gateway 30 is the signal processing unit 3
0b indicates that the transmission packet is a subsystem 2 under its own control.
If it is determined that the address is addressed to 0, the upper network 1
It is searched whether or not the "type data for each address of the fire sensor", which is the request data of 0, exists in the buffer unit 30d, and if it exists, the "type data for each address of the fire sensor" is read and a signal is output. The processing unit 30b is notified, and if it does not exist, the subsystem transmission / reception unit 30c is notified that “a contact for the type of each address of the fire sensor in the subsystem 20 is requested”.

When the subsystem transmission / reception unit 30c receives a request from the buffer search unit 30e to "request communication of the type of each fire sensor address in the subsystem 20", the subsystem 20 under the jurisdiction "subscribes". A transmission packet "Requesting contact for each type of fire sensor address in system 20" is transmitted, and "type data for each address of fire sensor" is received from the managed device 21 of the subsystem 20 under the control, Subsystem 20 under the jurisdiction
The "type data for each address of the fire sensor" obtained from the above is stored in the buffer unit 30d and the buffer search unit 30
Hand over to e. The buffer unit 30d sequentially stores the data received by the subsystem transmitting / receiving unit 30c as long as the storage capacity has a margin, but when the storage capacity has a margin, the buffer unit 30d sequentially volatilizes the oldest storage data. .

The signal processing unit 30b includes a buffer search unit 30.
If e is the “type data for each address of the fire sensor” read from the buffer unit 30d, the buffer search unit 30e
If the "type data for each address of the fire sensor" received from the subsystem transmitting / receiving unit 30c is received anyway from the buffer search unit 30e, the "type data for each address of the fire sensor" is received from the buffer search unit 30e. The "type data for each address of the fire sensor" is processed into a reply packet, and a transmission packet for "requesting contact for each type of fire sensor address in the second subsystem 20" is sent via the upper network transmission / reception unit 30a. A reply is sent to the management device 11 of the upper network 10 that has transmitted.

That is, in the above network management system, as shown in the operation diagram of FIG. 2, the gateway 30 is the managed device of the subsystem 20 if it is the first request data from the upper network 10. Although it burdens 21 to send back desired request data,
From the second time, as long as the requested data exists in the buffer unit 30d of the gateway 30, the corresponding data that may be stored in the database 21c of the managed device 21 can be directly stored without burdening the managed device 21. You can reply to the upper network 10.

Therefore, the managed device 2 of the subsystem 20
1 is not burdened so much by the data request from the upper level network 10 coming through the gateway 30, and various electric equipment devices (fire sensor, crime prevention, etc.) monitored and controlled by the managed device 21 in the subsystem 20. It is possible to improve the response (access frequency) of the managed device 21 to the sensor, the start / stop monitoring control terminal device, and the like.

[Second Embodiment] FIG. 3 is a system configuration diagram showing a network management system. Since the same parts as those described in the first embodiment are designated by the same reference numerals, detailed description of the same parts will be omitted.

The network management system shown in FIG. 3 is different from the conventional example in that the gateway 30 has a buffer unit 30d corresponding to a storage unit, a buffer search unit 30e corresponding to a search unit, and an erasing unit. And a buffer erasing unit 30f that operates. The buffer erasing unit 30f, based on the instruction from the signal processing unit 30b in accordance with the instruction from the host network 10,
This is a part for randomly accessing and erasing the predetermined data stored in d.

The operation of the network management system shown in FIG. 3 is almost the same as that of the first embodiment, so a detailed description of the same operation will be omitted. As a transmission packet from the management device 11 for deleting data stored in the buffer unit 30d, for example, “delete the start / stop status data of each air conditioner existing in the buffer unit 30d of the first gateway 30”. The transmission packet concerned is also present.

That is, in the above network management system, the gateway 30 is used as in the first embodiment.
Is the first request data from the higher level network 10, it causes the managed device 21 of the subsystem 20 to load the desired request data and returns it, but from the second time, the request is made to the buffer unit 30d of the gateway 30. As long as data exists, the database 21 of the managed device 21 can be used without burdening the managed device 21.
The corresponding data that should be stored in c can be returned to the upper network 10. Also, the gateway 30 sequentially increases the storage data of the buffer unit 30d each time it receives a data request that does not exist in the buffer unit 30d, and when the storage capacity becomes full, the oldest data is volatilized and new data is buffered. The data is stored in the unit 30d.

By the way, as is apparent from the above description, it is preferable that a large amount of data is stored in the buffer unit 30d in the sense that the managed device 21 of the subsystem 20 is not burdened. However, among the data stored in the buffer unit 30d, there are almost no changes such as "type data for each address of the fire sensor" and "data regarding start / stop status of each air conditioner". Some can change frequently. It is needless to say that the gateway 30 preferably correctly returns the current state of the subsystem 20 under its control to the upper network 10.

Therefore, it is preferable to erase "start / stop status data of each air conditioner" among the data stored in the buffer section 30d at an appropriate time that is not so long. Further, for example, if construction such as changing the type of the fire sensor is performed, "type data for each address of the fire sensor" in the data stored in the buffer unit 30d can be forcibly deleted. preferable. Therefore,
From the upper network 10 to the gateway 30,
The buffer erasing unit 30f is provided so that it can instruct to forcibly erase only the predetermined data among the data stored in the buffer unit 30d.

In the network management system shown in FIG. 3, the operation of erasing predetermined data in the data stored in the buffer section 30d is performed as follows. That is, the management device 11 of the upper network 10 transmits to the gateway 30, for example, a transmission packet to the effect that “delete the start / stop status data of each air conditioner existing in the buffer unit 30d of the first gateway 30”. Then, the upper network transmitting / receiving unit 30 of the gateway 30
a receives a transmission packet to the effect that “Delete the start / stop status data of each air conditioner existing in the buffer unit 30d of the first gateway 30”, and the signal processing unit 30b of the gateway 30 determines that the transmission packet is It is determined whether or not the message is addressed to the subsystem 20 under the jurisdiction of the above, and if it is addressed to the subsystem 20 under its own jurisdiction, the message content of the transmission packet is analyzed and the content is buffered. The erasing unit 30f is notified.

The buffer erasing section 30f is a signal processing section 30.
If the notification from b is, for example, "delete the start / stop status data of each air conditioner", the buffer unit 30d
To find and delete the start / stop status data of the air conditioner. The buffer erasing unit 30f does not perform the erasing operation instructed by the higher-level network 10, but voluntarily determines the current degree of burden (current work congestion) of the managed device 21 of the subsystem 20 under its control. In addition to the above, the data item to be erased may be voluntarily determined, or the timing of erasing may be voluntarily determined.

[Third Embodiment] FIG. 4 is a system configuration diagram showing a network management system. Since the same parts as those described in the first embodiment are designated by the same reference numerals,
A detailed description of equivalent portions will be omitted.

The network management system shown in FIG. 4 is different from the conventional example in that the gateway 30 has a buffer unit 30d corresponding to a storage unit, a buffer search unit 30e corresponding to a search unit, and an erasing unit. The buffer erasing unit 30f ₁ and the request number counting unit 30g corresponding to the frequency detecting unit are provided.

The request number counting unit 30g, based on the result of message content analysis of the transmission packet received by the upper network transmission / reception unit 30a performed by the signal processing unit 30b,
Count the number of requests for each request data. Then, as described above, the gateway 30 receives the data request that does not exist in the buffer unit 30d every time the gateway unit 30 receives the data request.
When the storage data of d is sequentially increased and the storage capacity is not enough, the request number counting unit 30g indicates the data that has a small number of requests from the higher-level network 10 and has little effect even if it is erased. Therefore, the buffer erasing unit 30f ₁ erases the data indicated by the number counting unit 30g.

Therefore, the buffer unit 3 of the gateway 30
Even if the storage capacity of 0d is not increased so much, the managed device 21 of the subsystem 20 is not burdened so much by the data request from the upper network 10 coming through the gateway 30, and the subsystem 2
The response (access frequency) of the managed device 21 to various electric equipment devices (fire sensor, crime prevention sensor, start / stop monitoring control terminal device, etc.) monitored and controlled by the managed device 21 at 0 can be improved.

[Fourth Embodiment] FIG. 5 is a system configuration diagram showing a network management system, and FIG. 6 is an operation diagram for explaining a main operation of the network management system. In addition,
Since the same reference numerals are given to the same portions as the portions described in the related art, detailed description of the same portions will be omitted.

The network management system shown in FIG. 5 is different from the conventional example in that the gateway 30 has a database unit 30h corresponding to a storage unit and a database search unit 30i corresponding to a search unit. .

The database unit 30h sequentially volatilizes from the oldest stored data when the data is sequentially pushed in from the front and the storage capacity is exhausted.
Unlike d, a storage area is provided in advance for each data request item so that the management device 11 of the higher-level network 10 can store data that should be requested to the subsystem 20, and data is updated unless otherwise instructed. It is prohibited. The database search unit 30i is configured to search for and read the data stored in the database unit 30h.

The network management system shown in FIG.
It works as follows. That is, the gateway 30
When the network management system is started up, in order to obtain data of items programmed to be stored in advance in the database unit 30h from the subsystem 20 as an initial setting, for example, "type for each address of fire sensor""Data" is requested to the subsystem 20 via the subsystem transmitting / receiving unit 30c, and the reply data from the subsystem 20 to the data request is stored in a predetermined data item storage area in the database unit 30h. Store.

The gateway 30 operates as described above.
When all the items programmed in advance as initial settings are completely stored in the data item-specific storage areas defined in the database unit 30h, the standby state of transmission packets from the management device 11 of the upper network 10 become. The transmission packet from the management device 11 may be, for example, “Request for notification of start / stop status of each air conditioner in No. 1 subsystem 20”, “No. 2 subsystem 20”.
"Call for contact for each type of fire sensor address (type of heat ray, smoke, analog, digital, etc.)", "Stop the air conditioners at address 1 and address 3 in subsystem 1", etc. There are various transmission packets related to control.

Now, for example, when the upper network transmission / reception unit 30a of the gateway 30 receives a transmission packet of "request for contact for each type of fire sensor address in the second subsystem 20", the signal processing unit of the gateway 30. 30b determines whether or not the transmission packet is addressed to the subsystem 20 under its control, and the "type data for each address of the fire sensor" requested by the upper network 10 is stored in the database unit 30h. It immediately recognizes whether or not it exists, and if it does not exist in the database unit 30h, it immediately notifies the subsystem transmission / reception unit 30c that "a contact for the type of each fire sensor address in the subsystem 20 is requested", and the database unit 30h.
If it exists, the storage area of the database unit 30h is immediately recognized and the database search unit 30
i is requested to read.

If the database search unit 30i is requested to read out, the database search unit 30i.
i immediately reads the data of the requested item from the database unit 30h and transfers it to the signal processing unit 30b. In addition, if the subsystem transmission / reception unit 30c is the "subsystem 20",
Seeking contact for each type of fire sensor address "
If the notification to that effect is received, the subsystem transmitting / receiving unit 3
0c transmits a transmission packet to the subordinate subsystem 20 under the jurisdiction "Requesting contact for each type of address of fire sensor in the sub subsystem 20", and the managed device 21 of the subordinate subsystem 20 under the jurisdiction "fire. “Type data for each sensor address” is received, and the subsystem 2 under the jurisdiction
"Type data for each address of the fire sensor" obtained from 0
To the signal processing unit 3 via the database search unit 30i.
Pass to 0b.

The signal processing unit 30b receives the "type data for each address of the fire sensor" read by the database searching unit 30i from the database unit 30h. Even if it is the type data for each address,
Anyway, when the "type data for each address of the fire sensor" is received from the database search unit 30i, the "type data for each address of the fire sensor" received from the database search unit 30i is processed into a reply packet, and the upper network transmission / reception unit 30a is processed. Via the network to the management device 11 of the higher-level network 10 that has transmitted a transmission packet to the effect that “a contact for the type of each fire sensor address in the second subsystem 20 is sought”.

That is, in the above-described network management system, as shown in the operation diagram of FIG. 6, the gateway 30 has each item X programmed in advance as an initial setting when the network management system is started up.
_When data requests of _1, ... X _n are sequentially made to the managed device 21 of the subsystem 20 and acquired, and the acquired data is stored in the predetermined storage area for each data item of the database unit 30h. Then, it becomes ready to respond to the data request from the host network 10.

[0055] Then, the gateway 30, the item Y ₁ request data is not in the database unit 30h from the upper network _10, if the data of ... Y _n, subsystem 2
Although the managed device 21 of 0 is loaded with the desired request data and returned, the data of the items X _1, ..., X _{n in} the database unit 30h purposely burden the managed device 21. Without it, the corresponding data that may be stored in the database 21c of the managed device 21 can be directly returned to the upper network 10.

Therefore, in the above-mentioned network management system, the managed device 21 of the subsystem 20 is connected to the higher-level network 1 coming through the gateway 30.
The data request from 0 does not place a heavy burden on the managed device 21 in the subsystem 20.
It is possible to improve the response (access frequency) of the managed device 21 to various electric equipment devices (fire sensor, crime prevention sensor, start / stop monitoring control terminal device, etc.) that are monitored / controlled by. Further, this gateway 30 is
Since the storage means is not the buffer section as in the first to third embodiments in which the desired data storage position is frequently moved, but the database section that is always fixed, the initial setting is once completed and the operation is started. Then, the requested data can be retrieved and read out at high speed, and high processing capability can be exhibited. That is, the overall response can be improved.

[Fifth Embodiment] FIG. 7 is a system configuration diagram showing a network management system. Incidentally, since the same parts as those described in the fourth embodiment are designated by the same reference numerals, detailed description of the same parts will be omitted.

The network management system shown in FIG. 7 is different from the conventional example in that the gateway 30 has a database unit 30h corresponding to a storage unit, a database searching unit 30i corresponding to a searching unit, and a database updating unit. This is a configuration including a corresponding database updating unit 30j. The database updating unit 30j not only randomly accesses and updates the predetermined data stored in the database unit 30h based on the instruction from the signal processing unit 30b according to the instruction from the upper network 10, but also receives the instruction from the upper network 10. Depending on the instruction from the signal processing unit 30b, the item content to be stored in the database unit 30h is also changed.

The operation of the network management system shown in FIG. 7 is almost the same as that of the fourth embodiment, so a detailed description of the same operation will be omitted. As a transmission packet from the management device 11 of, for example, a database unit 30h such as "Delete the start / stop state data of each air conditioner existing in the database unit 30h of the first gateway 30 and update to the latest start / stop state data". A transmission packet related to data erasure stored in, or a storage area of the item of start / stop status data of each air conditioner existing in the database unit 30h of the first gateway 30 is set as an item of set temperature data of each air conditioner. There is also a transmission packet related to the item content change stored in the database unit 30h, such as "change to storage area". .

That is, in the network management system described above, the gateway 30 is used as in the fourth embodiment.
When the network management system is started up, the data request for each item pre-programmed as an initial setting is sequentially performed on the managed device 21 of the subsystem 20 and acquired, and the acquired data is acquired by the database unit 30h.
When the data has been stored in the predetermined storage area for each data item, the state becomes ready for the data request from the host network 10.

If the request data from the upper network 10 is data that is not included in the database section 30h, the gateway 30 puts a burden on the managed device 21 of the subsystem 20 and returns the desired request data. However, if the data is the item in the database unit 30h, the corresponding data that may be stored in the database 21c of the managed device 21 is directly transferred to the upper network 10 without burdening the managed device 21. You can reply to.

By the way, the storage means of the gateway 30 is moved to the first to third locations where the desired data storage location is frequently moved.
Since it is not the buffer unit as in the embodiment but the database unit that is always fixed, once the initial setting is completed and the operation is started, a high processing capacity can be exerted for the retrieval and reading of the requested data. However, as described in the second embodiment, it is preferable that the gateway 30 correctly returns the current state of the subsystem 20 under its control to the higher level network 10, and it may take an appropriate time depending on the item. The data needs to be refreshed. Therefore, the database updating unit 30j is provided so that the refresh can be instructed. In order to effectively use the storage capacity of the database updating unit 30j, for example,
The database updating unit 30j is provided so that the area used for storing the set temperature data in the summer can be switched to the storage area for the set temperature data in the winter and used.

In the network management system shown in FIG. 7, the predetermined data stored in the database section 30h is updated as follows. That is, the management device 11 of the higher-level network 10 sends, for example, a message saying "Delete the start / stop status data of each air conditioner existing in the database unit 30h of the first gateway 30 and update it to the latest start / stop status data". The packet is transmitted to the gateway 30. Then, the upper network transmission / reception unit 30a of the gateway 30 sends a transmission packet to the effect that "delete the start / stop status data of each air conditioner existing in the database unit 30h of the first gateway 30 and update it to the latest start / stop status data". Is received, and the signal processing unit 30 of the gateway 30 is received.
b is a subsystem 2 under the jurisdiction of the transmission packet.
It determines whether or not it is destined for 0, and if it is destined for the subsystem 20 under its own control, analyzes the message contents of the transmission packet and notifies the contents to the database updating unit 30j. At the same time, the subsystem transmitting / receiving unit 30c is notified via the database searching unit 30i.

Then, the subsystem transmitting / receiving unit 30c
A transmission packet to the effect that “a request for contact of the start / stop status data of each air conditioner” is sent to the subsystem 20, and the managed device 21 of the subsystem 20 under its control sends “start / stop status data of each air conditioner”. Is received, and the "start / stop status data of each air conditioner" is stored in a predetermined storage position of the database unit 30h indicated by the database updating unit 30j.

Further, in the network management system shown in FIG. 7, the items to be stored in the database unit 30h are changed as follows. That is, the management device 11 of the higher-level network 10, for example, "switches the area used for storing the set temperature data in summer existing in the database unit 30h of each gateway 30 to the storage area for set temperature data in winter". A transmission packet to that effect is transmitted to each gateway 30.

Then, the upper network transmitting / receiving unit 30a of the gateway 30 receives the transmission packet to the effect that "the area used for storing the set temperature data in summer should be switched to the storage area for set temperature data in winter". The signal processing unit 30b of the gateway 30 determines whether or not the transmission packet is addressed to the subsystem 20 under its control, and the subsystem 2 under its control.
If it is addressed to 0, the message content of the transmission packet is analyzed, and the content is notified to the database updating unit 30j and the subsystem transmitting / receiving unit 30c via the database searching unit 30i.

The database updating section 30j uses, for example, the area used for storing the set temperature data of summer existing in the database section 30h for the set temperature data of winter according to the content of the notification from the signal processing section 30b. Revise. On the other hand, the subsystem transmitting / receiving unit 30c
To the managed device 21 of the subsystem 20 under its own control, and sends "Winter set temperature data of each air conditioner" to Is received and the "winter set temperature data of each air conditioner" is stored in a predetermined position revised for the winter set temperature data of the database unit 30h indicated by the database updating unit 30j.

It should be noted that the database updating unit 30j does not perform the data updating operation or the item content changing operation for making a database, as instructed by the higher level network 10.
In addition to voluntarily determining the current degree of burden on the managed device 21 of the subsystem 20 under the jurisdiction (the current degree of work congestion), it also voluntarily determines the items to be updated and the items to be stored in the database. You may be allowed to do so.

Further, the present invention is not limited to the network management system of the wide area network such as WAN for connecting the various buildings as in the above-mentioned embodiment, but the central monitoring and control panel provided in the building and the like of each floor. A medium-scale network management system that monitors and controls the local monitoring and control panel, or a small-scale network management system that monitors and controls various electrical equipment devices and sensors on the floor from the local monitoring and control panel on each floor. May be

[0070]

Since the network management system of the present invention is configured as described above, in the invention of claim 1, the gateway manages the data requested by the upper network under its own jurisdiction. When requesting the subsystem of, and returning the acquired data to the upper network, the acquired data can be stored in the storage means of the gateway, and from the next time when the same data request is made from the upper network, The gateway can retrieve the requested data from the storage means by the gateway's search means and send it back to the upper level network without requesting data from the subsystem under its control. Can provide a network management system that improves Achieve the results.

According to the invention of claim 2, claim 1
In addition to the effects of the invention described above, it is possible to specify and erase data in the storage means that is out of date and does not match the current situation. It is possible to provide a network management system with a wide range of use that can handle even data.

According to the invention of claim 3, claim 2
In addition to the effects of the described invention, the data to be erased in the storage means can be remotely instructed from a host network.
This has the effect of providing a user-friendly network management system.

According to the invention of claim 4, the data having a low request frequency from the host network in the storage means can be erased, so that the effect of the invention of claim 1 can be sufficiently achieved with a relatively small storage capacity. This has the effect of providing an excellent network management system that can be brought out to the next level.

According to the invention of claim 5, claim 1
In addition to the effects of the invention described above, since the storage means is a database, there is an effect that it is possible to provide a network management system in which the response is further improved over the entire system.

According to the invention of claim 6, claim 5 is provided.
In addition to the effects of the invention described above, since it is possible to remotely instruct an item to be made into a database from the upper network in advance, it is possible to provide a convenient network management system.

According to the invention of claim 7, claim 6 is provided.
In addition to the effects of the described invention, it is possible to provide an excellent network management system that can effectively use the capacity of the storage area of the database, because the item contents of the data to be made into a database can be arbitrarily changed by an instruction from the upper network. Produce an effect.

[Brief description of drawings]

FIG. 1 is a first of a network management system according to the present invention.
It is a system configuration diagram showing an example.

FIG. 2 is an operation diagram illustrating an operation of a main part of the above embodiment.

FIG. 3 is a second network management system according to the present invention.
It is a system configuration diagram showing an example.

FIG. 4 is a third part of the network management system according to the present invention.
It is a system configuration diagram showing an example.

FIG. 5 is a fourth example of the network management system according to the present invention.
It is a system configuration diagram showing an example.

FIG. 6 is an operation diagram illustrating an operation of a main part of the above embodiment.

FIG. 7: Fifth of the network management system according to the present invention
It is a system configuration diagram showing an example.

FIG. 8 is a system configuration diagram showing a conventional network management system.

[Explanation of Codes] 10 Upper Network 11 Management Device 20 Subsystem 21 Managed Device 30 Gateway 30d Storage Means 30e Searching Means 30f Erasing Means 30f ₁ Erasing Means 30g Frequency Detecting Means 30h Database 30i Searching Means 30j Database Updating Means

Claims (7)

[Claims] 1. A host network having a management device,
In a network management system including a subsystem having a managed device, and a gateway for obtaining desired data from the managed device under the jurisdiction and returning it to the upper network if a data request is made from the superordinate network to the subordinate subsystem The gateway is characterized by comprising storage means for storing reply data returned to the upper network, and retrieval means for retrieving whether or not request data from the upper network is stored in the storage means. Network management system. 2. A host network having a management device,
In a network management system including a subsystem having a managed device, and a gateway for obtaining desired data from the managed device under the jurisdiction and returning it to the upper network if a data request is made from the superordinate network to the subordinate subsystem The gateway has a storage unit for storing reply data returned to the upper network, a searching unit for searching whether the request data from the upper network is stored in the storage unit, and a predetermined unit stored in the storage unit. A network management system comprising: an erasing means for erasing data. 3. A host network having a management device,
In a network management system including a subsystem having a managed device, and a gateway for obtaining desired data from the managed device under the jurisdiction and returning it to the upper network if a data request is made from the superordinate network to the subordinate subsystem The gateway is based on a storage unit for storing reply data returned to the upper network, a search unit for searching whether or not request data from the upper network is stored in the storage unit, and a deletion request from the upper network. A network management system comprising: erasing means for erasing predetermined data stored in the storage means. 4. A host network having a management device,
In a network management system including a subsystem having a managed device, and a gateway for obtaining desired data from the managed device under the jurisdiction and returning it to the upper network if a data request is made from the superordinate network to the subordinate subsystem The gateway includes a storage unit for storing reply data returned to the upper network, a search unit for searching whether or not the request data from the upper network is stored in the storage unit, and a request frequency for the request data from the upper network. A network management system comprising: frequency detection means for separately detecting and erasing means for erasing data having a low request frequency stored in the storage means. 5. A host network having a management device,
In a network management system comprising a subsystem having a managed device, and a gateway for returning desired data from a managed device under the jurisdiction to the upper network if a data request is made from the higher network to the subordinate subsystem The gateway searches a database for preliminarily collecting and storing the data expected to be requested from the upper level network from the subsystem under its control, and searching whether the request data from the upper level network is stored in the database. A network management system comprising a search means. 6. A host network having a management device,
In a network management system including a subsystem having a managed device, and a gateway for obtaining desired data from the managed device under the jurisdiction and returning it to the upper network if a data request is made from the superordinate network to the subordinate subsystem The gateway has a database for preliminarily collecting and storing the data instructed from the higher level network from the subsystem under its control, and a search means for searching whether or not the requested data from the higher level network is stored in the database. A network management system comprising: 7. A host network having a management device,
In a network management system including a subsystem having a managed device, and a gateway for obtaining desired data from the managed device under the jurisdiction and returning it to the upper network if a data request is made from the superordinate network to the subordinate subsystem The gateway has a database for preliminarily collecting and storing the data instructed from the higher level network from the subsystem under its control, and a search means for searching whether or not the requested data from the higher level network is stored in the database. A network management system comprising: a database updating unit that updates an item content of the database in response to an instruction from a host network.