JP2007249829A - Communication system between internal networks, information processor and repeating information processor, communication control program, communication control method between internal networks, remote fault management system, managed device, and management device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication method between internal networks capable of adjusting traffic volume generated by allowing information to be transmitted and received between the internal networks (between information processors equipped with the respective internal networks) and considering throughput of information processor and a communication line. <P>SOLUTION: Transmission and reception of information between information processors (PC15A or PC15B) provided in an internal network (14A or 14B) is performed by inquiring a repeating server 12 placed on an open segment about whether or not there are data addressed to itself while accumulating data to be transmitted temporarily. When an overload state (busy state) of resources is detected in the repeating server 12, information for limiting the next inquiry period is transmitted from the repeating server 12 in addition to a response to the inquiry from the information processor, the traffic volume generated is adjusted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication method between information processing apparatuses via a network, and in particular, between internal networks in which restrictions are imposed on communication from the outside to the inside for security reasons (provided in each internal network). The present invention relates to a communication method between information processing apparatuses.

  A variety of processes are executed by connecting (networking) a plurality of information processing apparatuses and exchanging information between the information processing apparatuses. As one of such processes, A device (managed device) in a remote location is connected via a network to manage the device (fault management etc.) from a remote location.

  In such a remote failure management system, since it is disadvantageous in terms of cost if a new network for connecting a management device and a managed device at a remote location is provided, it is a communication infrastructure that has already been widely spread. A remote failure management system is constructed using the Internet, and related arts related to this are disclosed in Patent Documents 1 to 3, and the like.

JP-A-11-234271 JP 2004-86589 A JP 2005-228004 A

  In a network formed by connecting a plurality of networks represented by the Internet, a large amount of information can be shared by making resources in each network accessible from other networks. This is possible and is very convenient, but on the other hand, allowing free access from the outside causes a security problem. In order to deal with such security problems, a technique for improving the security inside the network by restricting communication from the outside (specifically, a packet filtering technique or a firewall technique using an application gateway) is widely used.

  FIG. 26 shows a conceptual block diagram of an internal network connected via the Internet. In such a configuration, basically, direct access from the device 2601A (or 2601B) in the internal network A (or B) to the device 2601B (or 2601A) in the internal network B (or A) is not performed. Therefore, two-way communication cannot be performed between the devices 2601A and 2601B (communication is possible depending on the setting of the firewall, but if such communication is possible, a serious security hole may be caused). Therefore, as described above, when a remote failure management system is constructed using the Internet, if the device to be managed and the management device are provided in different internal networks, they are applied as they are. (Because bi-directional communication between the management device and the managed device is not possible). In a remote failure management system that is actually operated, a device to be managed is usually a customer's device, and the managed device is naturally provided in an internal network (an in-company local network) of the customer. Is normal. In addition, since the management device on the administrator side stores information that should not be leaked to the outside, such as failure information, it is provided in the internal network on the administrator side, and is bidirectional between the two. In a conventional remote failure management system using the Internet that cannot communicate, the failure information is automatically notified to the management device using e-mail from the managed device when a failure occurs. It stayed at a certain level.

  In view of the above-described points, the present invention enables transmission / reception of information between internal networks (between information processing apparatuses provided in each internal network), and considers throughput of information processing apparatuses and communication lines. The main object of the present invention is to provide a communication method between internal networks in which the amount of generated traffic can be adjusted.

  The internal network communication system according to claim 1 includes a plurality of internal networks including an information processing apparatus having a communication unit, and the plurality of internal networks are configured to be connected to each other via the network. A first information processing device provided in a first internal network by disposing a relay information processing device including a communication unit and a storage unit on the network or on a demilitarized segment; Information transmitted to and received from the second information processing device provided in the second internal network from the first or second information processing device to the relay information processing device from the communication unit By temporarily storing it in the storage unit of the relay information processing device by sending it out, from the second or first information processing device The information from the first or second information processing apparatus accumulated in the storage unit of the relay information processing apparatus is added to the response when the request and response are communicated to the relay information processing apparatus, and the relay information processing is performed. The second or first information processing device is made to receive by sending it from the communication unit of the device, and the response of the relay information processing device to the request from the second or first information processing device is the next time The second or first information processing apparatus that has added and transmitted information for determining the request transmission timing determines the next request transmission time according to the next request transmission timing information, and the relay information processing apparatus When it is determined that the communication resource or the information processing resource is in an overloaded state, the relay information corresponding to the request from the second or first information processing apparatus The information that determines the next request transmission time at the time of overload is added to the response of the logical device and transmitted, and the second or first information processing device that has received the information transmits the response according to the next request transmission timing information at the time of overload. The next request transmission time is determined, or the next request transmission timing information is transmitted from the first or second information processing apparatus to the relay information processing apparatus to store the relay information processing apparatus. The second request transmission timing information is added to the response of the relay information processing apparatus in response to the request from the second or first information processing apparatus, and the second or first information is received. The information processing apparatus determines the next request transmission time according to the next request transmission timing information, and communication resources or information processing resources are overloaded by the first or second information processing apparatus. If it is determined, the next request sending timing information at the time of overload is sent from the first or second information processing device to the relay information processing device and stored in the storage unit of the relay information processing device, The second or first information that is transmitted by adding the next request transmission timing information at the time of overload to the response of the relay information processing apparatus in response to a request from the second or first information processing apparatus The processing device is characterized in that the next request transmission time is determined according to the next request transmission timing information at the time of overload.

  According to the above configuration, information can be transmitted and received between the information processing device provided in the internal network and the information processing device provided in another internal network via the relay information processing device. Become. That is, for example, information addressed to the information processing device B is transmitted from the information processing device A provided in the internal network A to the relay information processing device installed on the public segment or the demilitarized segment, and the information is accumulated. A request is issued from the information processing apparatus B provided in the internal network B to the relay information processing apparatus, and information from the information processing apparatus A is added to the response to the response. The apparatus B can receive information from the information processing apparatus A, and by repeating this, information can be transmitted and received between the information processing apparatus A and the information processing apparatus B. Further, according to the above configuration, it becomes possible to control (manage) the transmission timing of a request (request) issued by the other information processing apparatus by one information processing apparatus. In addition, for example, the information processing apparatus A is overloaded. In such a case, the information processing apparatus B is not allowed to transmit a request to the relay information processing apparatus for a while (the information processing apparatus B is not allowed to transmit a request until “next request transmission time at overload”). It is possible to do so.

  The internal network communication system according to claim 2 includes a plurality of internal networks including an information processing apparatus having a communication unit, and the plurality of internal networks are configured to be connected to each other via the network. A first information processing device provided in a first internal network by disposing a relay information processing device including a communication unit and a storage unit on the network or on a demilitarized segment; Information transmitted to and received from the second information processing device provided in the second internal network from the first or second information processing device to the relay information processing device from the communication unit By temporarily storing it in the storage unit of the relay information processing apparatus by sending it out, from the second or first information processing apparatus The information from the first or second information processing apparatus accumulated in the storage unit of the relay information processing apparatus is added to the response when the request and response are communicated to the relay information processing apparatus, and the relay information processing is performed. In transmission / reception of information between the first information processing apparatus and the second information processing apparatus, it is performed by causing the second or first information processing apparatus to receive the data by sending it from a communication unit of the apparatus. When the second or first information processing apparatus sends a request to the relay information processing apparatus at predetermined intervals, the relay information processing apparatus determines that the communication resource or the information processing resource is overloaded. If it is determined, the next request transmission timing at the time of overload is determined in the response of the relay information processing apparatus to the request from the second or first information processing apparatus. The second or first information processing apparatus that has received and transmitted the information determines the next request transmission time according to the overload next request transmission timing information, or the first or When the second information processing apparatus determines that the communication resource or the information processing resource is overloaded, the next request at the time of overload from the first or second information processing apparatus to the relay information processing apparatus Transmission time information is transmitted and accumulated in the storage unit of the relay information processing apparatus, and the next request transmission time information at the time of overload is added to the response of the relay information processing apparatus to the request from the second or first information processing apparatus. The second or first information processing apparatus that has received and received the request determines the next request transmission time according to the next request transmission timing information at the time of overload. The

  According to the above configuration, information can be transmitted and received between the information processing device provided in the internal network and the information processing device provided in another internal network via the relay information processing device. Become.

  An information processing apparatus according to claim 3 is the information processing apparatus provided in the inter-network communication system according to claim 1 or 2, and includes a communication resource monitoring unit or an information processing resource monitoring unit. If it is determined that the communication resource or the information processing resource is in an overloaded state, the overload to the information processing apparatus that transmits / receives information to / from the relay information processing apparatus via the information processing apparatus and the relay information processing apparatus is performed. The next request transmission time information at the time of loading is transmitted by the communication unit.

  According to the above configuration, for example, when the information processing apparatus A provided in the internal network A is in an overload state, the information processing apparatus B provided in the internal network B does not respond to the relay information processing apparatus for a while. It is possible to specify the next request transmission time for the information processing apparatus B by the information processing apparatus A through the relay information processing apparatus so that the request is not transmitted.

  A relay information processing apparatus according to claim 4 is the relay information processing apparatus provided in the inter-network communication system according to claim 1 or 2, and includes a communication resource monitoring unit or an information processing resource monitoring unit. Thus, when it is determined that the communication resource or the information processing resource is in an overload state, the next request sending timing information at the time of overload is added to the response to the information processing device that has transmitted the request to the relay information processing device. It is additionally transmitted by the communication unit.

  According to the above configuration, for example, when the relay information processing apparatus is in an overload state, the information processing apparatus A provided in the internal network A may send a request to the relay information processing apparatus for a while. As a result, it is possible to designate the next request transmission time of the information processing apparatus A by the relay information processing apparatus.

  The information processing apparatus according to claim 5 is the information processing apparatus provided in the inter-network communication system according to claim 1 or 2, and normally sends a request to the relay information processing apparatus. The request is sent at a time according to the next request sending time information, or a request is sent to the relay information processing apparatus at a predetermined interval, and the next request sending time information at the time of overload is added to the response from the relay information processing apparatus. If so, the next request transmission time is determined according to the next request transmission timing information at the time of overload.

  According to the above configuration, when the next request transmission time information at the time of overload is added to the response obtained when a request is made from the information processing device provided in the internal network to the relay information processing device. The next request transmission timing is determined according to the next request transmission timing information at the time of overload.

  The communication control program according to claim 6 determines whether or not the load state of the communication resource or the information processing resource is overloaded in the information processing apparatus provided in the inter-network communication system according to claim 1 or claim 2. A step of determining, a step of generating next request transmission timing information at the time of overload when it is determined by the determination that an overload condition has occurred, and a step of transmitting the next request transmission timing information at the time of overload to the relay information processing apparatus. And a step of sending.

  “Generate next request transmission timing information at overload” means to generate the information by calculation (for example, to calculate a predetermined time information by multiplying by a coefficient using “resource load factor” information) In addition, for example, a table in which “resource load factor” information and overload next request sending time information are associated in advance is provided, and the next request sending time during overload is referred to by referring to the table. This includes cases where information is acquired.

  According to a seventh aspect of the present invention, there is provided a communication control program for determining whether or not a load state of a communication resource or an information processing resource is an overload state in the relay information processing apparatus provided in the internal network communication system according to the first or second aspect. A step of generating next request transmission timing information at the time of overload when it is determined that the state is an overload state by the determination, and the information processing device that has transmitted a request to the relay information processing device. Adding the next request transmission time information at the time of overload to the response and transmitting the response.

  The communication control program according to claim 8 sends the request to the relay information processing apparatus to the information processing apparatus provided in the inter-network communication system according to claim 1 or claim 2 at the next request transmission. A step performed at a timing according to the timing information or a step of transmitting a request to the relay information processing apparatus at a predetermined interval in normal time, and a next request transmission timing information at the time of overload is added to a response from the relay information processing apparatus And a step of sending a next request according to the next request sending timing information at the time of overload when the next request sending timing information at the time of overload is added. Features.

  The communication control method between internal networks according to claim 9 includes a plurality of internal networks including an information processing apparatus having a communication function, and the plurality of internal networks are connected to each other via the network. A communication control method in a communication system between internal networks, wherein a relay information processing device is arranged on the network, whereby a first information processing device provided in the first internal network and a second internal network Relay information processing apparatus by transmitting information transmitted / received to / from the second information processing apparatus included in the first information processing apparatus to the relay information processing apparatus. The request and response from the second or first information processing apparatus to the relay information processing apparatus. At the time of transmission, the information from the first or second information processing apparatus accumulated in the relay information processing apparatus is added to the response and transmitted from the relay information processing apparatus to send the second or first information This is performed by causing the processing device to receive the information, which is added to the response of the relay information processing device in response to the request from the second or first information processing device, and is transmitted and received. The second or first information processing apparatus determines the next request transmission time according to the next request transmission timing information, and the relay information processing apparatus determines that the communication resource or the information processing resource is overloaded. In this case, the information for determining the next request transmission timing at the time of overload in the response of the relay information processing apparatus to the request from the second or first information processing apparatus. The second or first information processing apparatus that has received and received the transmission request determines the next request transmission time according to the next overload next request transmission timing information, or Next request transmission time information is transmitted from the first or second information processing apparatus to the relay information processing apparatus and stored in the storage unit of the relay information processing apparatus, and the request from the second or first information processing apparatus The second request transmission timing information is added to the response of the relay information processing apparatus for transmission, and the second or first information processing apparatus that receives the response transmits the next request according to the next request transmission timing information. If the time is determined and the first or second information processing device determines that the communication resource or the information processing resource is overloaded, the first or second information processing device The relay information processing apparatus transmits the next request transmission time information at the time of overload and stores it in the storage unit of the relay information processing apparatus, and the relay information processing apparatus in response to a request from the second or first information processing apparatus The second or first information processing apparatus that has received and transmitted the next request transmission timing information at the time of overload transmits the next request according to the next request transmission timing information at the time of overload. It is characterized by setting time.

  The communication control method between internal networks according to claim 10 includes a plurality of internal networks including an information processing apparatus having a communication function, and the plurality of internal networks are connected to each other via the network. A communication control method in a communication system between internal networks, wherein a relay information processing device is arranged on the network, whereby a first information processing device provided in the first internal network and a second internal network Relay information processing apparatus by transmitting information transmitted / received to / from the second information processing apparatus included in the first information processing apparatus to the relay information processing apparatus. And the request and response to the relay information processing apparatus from the second or first information processing apparatus. At the time of communication, the information from the first or second information processing apparatus accumulated in the relay information processing apparatus is added to the response and transmitted from the relay information processing apparatus, whereby the second or first information In the transmission / reception of information between the first information processing apparatus and the second information processing apparatus, the processing apparatus normally receives the information from the second or first information processing apparatus. The second or first information processing apparatus is configured to transmit requests to the relay information processing apparatus at predetermined intervals, and when the relay information processing apparatus determines that the communication resource or the information processing resource is overloaded. The information that determines the next request transmission timing at the time of an overload is added to the response of the relay information processing apparatus in response to the request from the transmitter, and the second information is received. The first information processing apparatus determines a next request transmission time according to the next request transmission time information at the time of overload, or a communication resource or an information processing resource is overloaded by the first or second information processing apparatus If it is determined, the next request transmission timing information at the time of overload is transmitted from the first or second information processing apparatus to the relay information processing apparatus and stored in the relay information processing apparatus. The second or first information processing that transmits the response request of the relay information processing apparatus to the request from the second or first information processing apparatus by adding the next request transmission time information at the time of overload and transmits the request. The apparatus is characterized in that the next request transmission time is determined according to the next request transmission timing information at the time of overload.

  The remote failure management system according to claim 11, wherein one or a plurality of customer internal networks having a managed device having a communication unit and a failure detection function and an administrator internal network having a management device are connected to each other via the network. A remote fault management system configured by arranging a relay information processing apparatus including a communication unit and a storage unit on the network or on an unarmed segment on the administrator internal network side, The transmission unit transmits / receives information to / from the management device from the communication unit to the relay information processing device by transmitting information transmitted from the management device or the managed device to the relay information processing device. Request and response to the relay information processing apparatus from the managed apparatus or the management apparatus At the time of communication, the information from the management device or the managed device accumulated in the storage unit of the relay information processing device is added to the response and transmitted from the communication unit of the relay information processing device, so that the managed device In the transmission / reception of information between the managed device and the management device, normally, the managed device for inquiring whether there is an instruction from the management device When a request is transmitted to the relay information processing apparatus at a first time interval and the managed device detects a failure, the fact that the failure has occurred is added to the request to the relay information processing device and transmitted. The relay information processing at least until a response from the management apparatus to the failure notification is received or during a predetermined period. The transmission of requests to the device and performs in the short second time interval than the first time interval.

  According to the above configuration, when the managed device is normal (when no failure is detected), a request for the relay information processing device is transmitted at the first time interval, and the failure is detected. Is shorter than the first time interval until a failure notification is transmitted to the management device via the relay information processing device and at least a response from the management device to the failure notification is received or in a predetermined period. A request for the relay information processing apparatus is transmitted at the second time interval. It should be noted that “submit a request for the relay information processing apparatus at the first time interval” or “send a request for the relay information processing apparatus at the second time interval shorter than the first time interval during the predetermined period” The management device's “subject sending timing” may be a managed device, or “next request sending timing information” that defines the “request sending timing” is sent from the management device to the relay information processing device. To the managed device, and the managed device may follow this to make the management device control the “request sending timing” (or “next request sending timing information” The relay information processing apparatus may determine the relay information processing apparatus and transmit it to the managed apparatus, and the managed apparatus may follow this, thereby controlling the “request sending timing” as the relay information processing apparatus).

  The remote failure management system according to claim 12 is the remote failure management system according to claim 11, wherein when the relay information processing apparatus determines that the communication resource or the information processing resource is in an overloaded state, The information that determines the next request transmission timing at the time of overload is added to the response of the relay information processing apparatus in response to the request from the managed apparatus and transmitted, and the managed apparatus that has received the request transmits the next request at the time of the overload The next request transmission time is determined according to the transmission timing information, or when the management device determines that the communication resource or information processing resource is overloaded, the management device overloads the relay information processing device. Next request transmission time information at the time of load is transmitted and stored in the storage unit of the relay information processing apparatus, and the response of the relay information processing apparatus to the request from the managed apparatus Send it with overload the next request sending time information, it said managed device that has received this defines a time transmission of the next request in accordance with the overload next request sending time information, characterized in that.

  According to the above configuration, even if a request to the relay information processing apparatus is periodically sent from the managed apparatus at the first time interval or the second time interval, the response from the relay information processing apparatus When the overload next request transmission timing information is added, the next request transmission time is determined according to the overload next request transmission timing information.

  The remote fault management system according to claim 13 is the remote fault management system according to claim 11 or claim 12, wherein when the fault occurrence notification is transmitted from the managed device, the emergency level information is added and transmitted. When the relay information processing apparatus receives the request with the urgency level information added, the relay information processing apparatus generates the next request transmission timing information using the urgency level information, and sets the next request transmission timing information to the The managed device, which is added to the response to the request and transmitted, receives the request, determines the next request transmission time according to the next request transmission timing information, or the management device passes the relay information processing device Thus, when the urgency information is received from the managed device, the urgency information is used to generate next request transmission timing information, and the next request transmission timing information is used as the relay information processing. Sent to the storage device and stored in the storage unit of the relay information processing device, and the next request transmission time information is added to the response of the relay information processing device in response to the request from the managed device, and is received. The managed device determines the next request transmission time according to the next request transmission timing information.

  According to the above configuration, when a failure is detected in the managed device, the urgency information is transmitted to the relay information processing device or the management device via the relay information processing device, and the relay that has received this information The processing device (or management device) generates next request transmission time information using the urgency information. As a result, for example, when the failure is serious and the urgency level is high, the “next request transmission timing” can be set to an early timing. In addition, when the information on the failure is included in the “failure occurrence notification”, the “emergency level information” may be the failure occurrence notification itself (the content of the information on the failure included in the “failure occurrence notification”) The urgency level may be determined by the urgency level, and is not necessarily limited to adding the urgency level information separately from the failure occurrence notification). In addition, the urgency information may be added by the user, or the urgency information corresponding to the “failure occurrence notification” is automatically added by associating the content of the failure with the urgency information in advance. May be. The “next request transmission timing information” is a concept (superordinate concept) including “next request transmission timing information at overload”.

  The remote fault management system according to claim 14 is the remote fault management system according to any one of claims 11 to 13, wherein the time is determined by the first time interval or the second time interval. If the management device determines that there is no request from the managed device in a time zone or a time zone determined by the next request transmission timing information, it determines that an abnormality has occurred and prepares for the management device. A warning is displayed on the display device to be stored, or an error log is stored in a storage unit provided in the management device, or the request is transmitted next time or in a time zone determined by the first time interval or the second time interval. When the relay information processing device determines that there is no request from the managed device in the time zone determined by the time information When the management apparatus determines that an abnormality has occurred and sends a response indicating that the abnormality has been detected as a response to the response, the management apparatus that has received the information transmits the error information. A warning is displayed on a display device provided in the management device, or an error log is accumulated in a storage unit provided in the management device.

  According to the above configuration, it is determined that there is no request from the managed device in the time zone determined by the first time interval or the second time interval, or in the time zone determined by the next request transmission timing information. In this case, this is stored as a warning display or an error log in the management apparatus.

  The managed device according to claim 15 is the managed device provided in the remote fault management system according to any one of claims 11 to 14, and in the normal state, there is an instruction from the management device. When a failure is detected at a first time interval, a request to the relay information processing device is sent in addition to the request to the relay information processing device. And at least a second time interval shorter than the first time interval for sending a request to the relay information processing device until a response from the management device to the failure occurrence notification is received or in a predetermined period. It is characterized by performing.

  The managed device according to claim 16 is the managed device provided in the remote fault management system according to any one of claims 12 to 14, wherein the next time in response to a response from the relay information processing device. When the request sending time information is added, the next request sending time is determined according to the next request sending time information.

  “Next request transmission timing information” is a concept (superordinate concept) including “next request transmission timing information at overload”.

  A managed device according to claim 17 is the managed device provided in the remote failure management system according to claim 13, and includes a failure urgency level table in which failure notification and urgency information are associated with each other, When the managed device detects a failure, the urgency information corresponding to the failure occurrence notification is acquired from the failure urgency degree table, and the urgency information is transmitted to the relay information processing device together with the failure occurrence notification. To the management device, or when the managed device detects a failure, the fact that the failure has occurred is output to the display device of the managed device, and an emergency from the user When the degree information is input, the urgent degree information is transmitted to the management apparatus via the relay information processing apparatus together with the failure occurrence notification.

  According to the above configuration, when the occurrence of a failure is detected, the urgency information is acquired according to the setting of the failure urgency table or according to the setting (input) from the user, and the urgency information is transmitted via the relay information processing apparatus. Sent to the management device.

  The management device according to claim 18 is the management device provided in the remote fault management system according to any one of claims 11 to 14, and is normally connected via the relay information processing device. The next request transmission timing information is transmitted to the management device so that the request transmission interval from the managed device to the relay information processing device becomes the first time interval, and the relay information processing device passes the request information. When the information indicating that the failure has occurred is received from the managed device, the request transmission interval from the managed device to the relay information processing device is set to the managed device via the relay information processing device. The next request transmission timing information is transmitted so as to be the second time interval.

  The management device according to claim 19 is the management device provided in the remote failure management system according to claim 13, wherein the urgency information is received from the managed device via the relay information processing device. Is used to generate the next request transmission timing information for each managed device by preferentially allocating the communication time to the managed device having a high degree of urgency by using the urgency level information. Time information is sent to each managed device via the relay information processing device.

  According to the above configuration, communication time is preferentially assigned to a managed device having a high degree of urgency by the management device.

  A relay information processing apparatus according to claim 20 is the relay information processing apparatus provided in the remote fault management system according to any one of claims 11 to 14, and normally, to the managed apparatus Next request transmission timing information is transmitted so that the request transmission interval from the managed device to the relay information processing device becomes the first time interval, and information indicating that the failure has occurred from the managed device. When received, the next request sending timing information is sent to the managed device so that the request sending interval from the managed device to the relay information processing device becomes the second time interval. And

  The relay information processing apparatus according to claim 21 is the relay information processing apparatus provided in the remote failure management system according to claim 13, and receives a request to which the urgency information is added from the managed apparatus. Uses the urgency information to prioritize communication times for managed devices with a high degree of urgency, thereby generating next request sending time information for each managed device. The information is transmitted in addition to a response to the request from each managed device.

  According to the above configuration, the communication time is preferentially allocated to the managed device having a high degree of urgency by the relay information processing.

  The relay information processing apparatus according to claim 22 is the relay information processing apparatus provided in the remote fault management system according to claim 14, wherein the relay information processing apparatus is in a time zone determined by the first time interval or the second time interval. Alternatively, if it is determined that there is no request from the managed device in the time period determined by the next request transmission timing information, it is determined that an abnormality has occurred, and this is used as error information to uniquely identify the managed device. Is stored in the communication history table in association with the identification information defined in the above, and when there is a request from the management device, the error information and the identification information of the managed device are added to the response to the request and transmitted. It is characterized by that.

  According to the above configuration, if it is determined by the relay information processing device that there is no request from the managed device in the time period determined by the next request transmission timing information, an abnormality has occurred in the relay information processing device. This is determined, and this is notified to the management apparatus together with identification information that uniquely defines the managed apparatus as error information.

  The management apparatus according to claim 23 is the management apparatus provided in the remote failure management system according to claim 14, wherein the error information is added to a response from the relay information apparatus. A warning is displayed on the display device provided in the storage device or is accumulated in a storage unit provided in the management device as an error log, or the communication history information of the managed device is inquired to the relay information device, and the communication history information If it is determined that there is no request from the managed device in the time zone determined by the first time interval or the second time interval, or in the time zone determined by the next request transmission timing information, an abnormality has occurred. A storage unit that is determined to have occurred and displays a warning on a display device provided in the management device or is provided in the management device as an error log Thereby accumulated, characterized by.

  A communication control program according to a twenty-fourth aspect is configured to inquire about the presence or absence of an instruction from the management device to the managed device provided in the remote failure management system according to any one of the eleventh to fourteenth aspects. A step of normally sending a request to the relay information processing apparatus at a first time interval, a step of determining the detection of a failure, and if it is determined that a failure has been detected by the determination, the fact that the failure has occurred Is added to the request for the relay information processing device and transmitted, and at least until a response from the management device is received for the failure notification or during a predetermined period, the request for the relay information processing device Performing the transmission at a second time interval shorter than the first time interval.

  A communication control program according to a 25th aspect is provided so that the management apparatus provided in the remote fault management system according to any one of the 11th to 14th aspects normally has the relay information processing apparatus from the managed apparatus. Generating the next request transmission timing information so that the request transmission interval for the first time interval becomes the first time interval, and transmitting the request transmission timing information to the managed device via the relay information processing device; and the relay information processing device Determining whether or not information indicating that a failure has occurred from the managed device has been received via the request, and if there is, a request transmission interval from the managed device to the relay information processing device Generating next request sending timing information so that the second time interval is reached, and sending this to the managed device via the relay information processing device. I am characterized in.

  A communication control program according to a twenty-sixth aspect includes a step of determining a failure detection in the managed device according to the seventeenth aspect, and an urgency level associated with the failure occurrence notification when it is determined that the failure is detected by the determination. A step of acquiring information; and a step of transmitting the failure occurrence notification and the urgency information in addition to a request to the relay information processing apparatus.

  A communication control program according to a twenty-seventh aspect includes a step of determining whether or not the urgency information is added to a response from the relay information processing apparatus, and the urgency information is added to the management apparatus according to the nineteenth aspect Generating the next request transmission timing information corresponding to each managed device by allocating the communication time with priority to the managed device having a high degree of urgency using the urgency level information if And sending the next request sending time information to each managed device via the relay information processing device.

  A communication control program according to a twenty-eighth aspect is directed to the relay information processing apparatus according to the twenty-second aspect, wherein a request transmission interval from the managed device to the relay information processing device is normally the first time interval. When there is a step of generating next request transmission timing information and transmitting it to the managed device, a step of determining whether or not information indicating that a failure has occurred has been received from the managed device, and Generating next request sending timing information so that a request sending interval from the managed device to the relay information processing device becomes the second time interval, and sending this to the managed device; Is executed.

  A communication control program according to a twenty-ninth aspect includes a step of determining whether or not the urgency information is added to a request from the managed device in the relay information processing apparatus according to the twenty-first aspect, A step of generating next request transmission timing information corresponding to each managed device by assigning a communication time with priority to a managed device having a high degree of urgency using the urgency information when added And a step of sending the next request sending timing information in addition to a response to the request from each managed device.

  A communication control program according to a thirty-third aspect provides the relay information processing apparatus according to the twenty-second aspect to a time determined by the first time interval or the second time interval or by the next request transmission timing information. A step of determining whether or not there is a request from the managed device in the band, and if it is determined that there is no request, it is determined that an abnormality has occurred and the managed device is uniquely determined as error information A step of storing in the communication history table in association with the identification information, and when there is a request from the management device, the error information and the identification information of the managed device are added to the response to the request and transmitted. And executing a step.

  A communication control program according to a thirty-first aspect comprises a step of inquiring the management device according to a twenty-third aspect of the communication history information of the managed device from the relay information device, and the first time interval or the first time from the communication history information. A step of determining whether or not there is a request from the managed device in a time zone determined by the time interval of 2 or in a time zone determined by the next request transmission timing information, and if it is determined that there is no request, the display A step of displaying a warning on the apparatus, or a step of accumulating in the storage unit as an error log.

  The communication control method according to claim 32 is characterized in that one or a plurality of customer internal networks having managed devices having a failure detection function and an administrator internal network having management devices are connected to each other via a network. A communication control method in a remote failure management system configured by a relay information processing device being arranged on or on a non-armed segment on the administrator internal network side, wherein the managed device and the management device Information is transmitted from the management device or the managed device to the relay information processing device, and is temporarily stored in the relay information processing device. From the managed device or the management device Stored in the relay information processing apparatus during communication of request and response to the relay information processing apparatus Information from the management device or the managed device is added to the response and sent from the relay information processing device to cause the managed device or the management device to receive the information, In transmission / reception of information to / from the management device, normally, a request is sent from the managed device to the relay information processing device for inquiring whether there is an instruction from the management device at a first time interval, When the managed device detects a failure, the fact that the failure has occurred is transmitted in addition to the request to the relay information processing device, and at least until a response from the management device to the failure notification is received The first time interval is used to send a request to the relay information processing apparatus during And carrying out a short second time interval.

  A communication control method according to a thirty-third aspect is the communication control method according to the thirty-second aspect, wherein the relay information processing apparatus determines that the communication resource or the information processing resource is overloaded. The information to determine the next request transmission time at the time of overload is added to the response of the relay information processing apparatus in response to the request from the apparatus and transmitted, and the managed apparatus that has received the information transmits the next request transmission time at the time of the overload When the next request is sent according to the information, or when the management device determines that the communication resource or the information processing resource is overloaded, the management device sends an overload to the relay information processing device. Next request sending time information is sent and stored in the relay information processing apparatus, and when the next request is sent at the time of overload, the relay information processing apparatus responds to the request from the managed apparatus. Is added to transmit information, it said managed device that has received this defines a time transmission of the next request in accordance with the overload next request sending time information, characterized in that.

  The communication control method according to claim 34 is the communication control method according to claim 32 or claim 33, wherein when the failure notification is transmitted from the managed device, the urgency information is added and transmitted, When the relay information processing apparatus receives a request with the urgency level information added, the relay information processing apparatus generates the next request transmission timing information using the urgency level information, and sets the next request transmission timing information to the request. The managed device that transmits the response in addition to the response determines the next request transmission time according to the next request transmission timing information, or the management device passes the relay information processing device. When the urgency information is received from the managed device, the next request transmission timing information is generated using the urgency information, and the next request transmission timing information is transmitted to the relay information processing device. This The information is accumulated in the relay information processing apparatus, and the next request transmission timing information is added to the response of the relay information processing apparatus in response to the request from the managed apparatus and transmitted. According to the transmission time information, the next request transmission time is determined.

  A communication control method according to a thirty-fifth aspect is the communication control method according to any one of the thirty-second to thirty-fourth aspects, wherein the communication control method is a time period determined by the first time interval or the second time interval. Alternatively, if it is determined by the management device that there is no request from the managed device in a time period determined by the next request transmission timing information, it is determined that an abnormality has occurred, or the first When the relay information processing device determines that there is no request from the managed device in the time interval determined by the time interval or the second time interval, or in the time interval determined by the next request transmission timing information When it is determined that an abnormality has occurred and there is a request from the management device, the fact that the abnormality has been detected is added to the response to this as error information. By transmitting, to notify the occurrence of abnormality to the management apparatus, and wherein.

  An internal network communication system comprising a plurality of internal networks each including an information processing apparatus having a communication unit according to claim 1 of the present invention, wherein the plurality of internal networks are connected to each other via a network. A relay information processing device including a communication unit and a storage unit on the network or on a demilitarized segment, the first information processing device provided in the first internal network, and the second internal Sending information transmitted / received from / to the second information processing apparatus provided in the network from the first or second information processing apparatus to the relay information processing apparatus from the communication unit. Is temporarily stored in the storage unit of the relay information processing apparatus, and is transmitted to the relay information processing apparatus from the second or first information processing apparatus. Information from the first or second information processing apparatus accumulated in the storage unit of the relay information processing apparatus is added to the response from the communication unit of the relay information processing apparatus when communicating the request and response This is performed by causing the second or first information processing device to receive the data by sending it, and the next request sending time is determined in response to the relay information processing device in response to the request from the second or first information processing device. The second or first information processing apparatus that transmits the information with addition of the information determines the next request transmission time according to the next request transmission timing information, and the relay information processing apparatus determines communication resources or information. When it is determined that the processing resource is overloaded, the response of the relay information processing apparatus to the request from the second or first information processing apparatus is overloaded The second or first information processing apparatus that has received and transmitted information for determining the next request transmission time in the next determines the transmission time of the next request according to the next request transmission timing information at the time of overload. Or the next request transmission timing information is transmitted from the first or second information processing apparatus to the relay information processing apparatus and stored in the storage unit of the relay information processing apparatus, and the second or The next request transmission timing information is added to the response of the relay information processing apparatus in response to the request from the first information processing apparatus and transmitted, and the second or first information processing apparatus that receives the request transmits the next request When the next request transmission time is determined according to the transmission timing information and the first or second information processing apparatus determines that the communication resource or the information processing resource is overloaded, The next request transmission time information at the time of overload is transmitted from the first or second information processing apparatus to the relay information processing apparatus and accumulated in the storage unit of the relay information processing apparatus, and the second or first information The second or first information processing apparatus that has received and transmitted the next request transmission timing information at the time of overload added to the response of the relay information processing apparatus in response to a request from the processing apparatus, According to the communication system between internal networks, the information processing apparatus provided in the internal network through the relay information processing apparatus, and the like, wherein the next request transmission time is determined according to the next request transmission timing information It is possible to transmit / receive information to / from an information processing apparatus provided in the internal network. Further, according to the above configuration, for example, when the information processing apparatus A is in an overload state, it is possible to prevent the information processing apparatus B from transmitting a request to the relay information processing apparatus for a while. Therefore, it is possible to suppress the occurrence of a situation in which traffic is concentrated and the load is further increased when resources (for example, communication lines) are overloaded. Thereby, it is possible to reduce the amount of resources such as communication lines constituting the system at the time of system design, and it is possible to construct the system at low cost. According to the above configuration, it is also possible to always control (manage) the transmission timing of a request (request) issued by the other information processing apparatus by one information processing apparatus.

  Claim 11 of the present invention, one or a plurality of customer internal networks having a managed device having a communication unit and a failure detection function, and an administrator internal network having a management device are connected to each other via the network, A remote failure management system configured by arranging a relay information processing device including a communication unit and a storage unit on the network or on a demilitarized segment on the administrator internal network side, the managed device, Sending / receiving information to / from a management device from the management device or the managed device to the relay information processing device by sending information transmitted from the communication device to the relay information processing device. When storing requests and responses from the managed device or the management device to the relay information processing device, The information from the management device or the managed device accumulated in the storage unit of the relay information processing device is added to the response and transmitted from the communication unit of the relay information processing device to send the managed device or the management When the information is transmitted / received between the managed device and the management device, the relay information processing device from the managed device for inquiring the presence / absence of an instruction from the management device in normal times When the managed device detects a failure, the request to the relay information processing device is transmitted in addition to the request to the relay information processing device, and at least the failure is transmitted. Until the response to the occurrence notification from the management device is received or for a predetermined period, the relay information processing device According to the remote fault management system, which sends a request at a second time interval shorter than the first time interval, for example, at a normal rate of once a day (first time interval) ) Makes a request from the managed device to the relay information processing device (inquiry as to whether there is an instruction from the management device, etc.). When a failure occurs, a 10-minute interval (the first time) 2), it is possible to execute processing such as inquiring of the relay information processing apparatus whether there is a response from the management apparatus to the transmitted failure occurrence notification. Inquiries from devices that do not require rapid response) are made at long time intervals, thereby suppressing an increase in the amount of transactions (traffic) that occurs in relay information processing devices, etc. By causing the inquiry at short time intervals from the device, it is possible such to perform rapid processing.

  If the relay information processing apparatus of the twelfth aspect of the present invention determines that the communication resource or the information processing resource is overloaded, the relay information processing apparatus responds to the request from the managed apparatus. The information to determine the next request transmission time at the time of overload is added and transmitted, and the managed device that has received the information determines the next request transmission time according to the next request transmission time information at the time of the overload, or When the management device determines that the communication resource or the information processing resource is in an overload state, the management device transmits the next request transmission timing information at the time of overload to the relay information processing device, and the relay information processing The information is accumulated in the storage unit of the device, and the next request transmission time information at the time of overload is added to the response of the relay information processing device in response to the request from the managed device and transmitted, and this is received. 12. The remote failure management system according to claim 11, wherein the managed device determines when to send the next request according to the next request sending timing information at the time of overload. An overload condition occurs in the relay information processing apparatus or the management apparatus by causing an inquiry (transmission of a request) from each apparatus to the relay information processing apparatus at a short time interval (second time interval). In such a case, it is possible to instruct the relay information processing device or the management device side to delay the time of the next inquiry to the device (managed device) where the failure has occurred. Suppress the occurrence of situations where processing delays increase exponentially due to a vicious circle in which traffic concentrates and loads increase when resources (for example, communication lines) are overloaded. Can.

  According to the thirteenth aspect of the present invention, when a failure occurrence notification is transmitted from the managed device, urgency information is added and transmitted, and the relay information processing device receives a request with the urgency information added If so, the urgency information is used to generate next request transmission timing information, the next request transmission timing information is added to the response to the request and transmitted, and the managed device that receives the request transmits the next request transmission timing information. When the next request transmission time information is determined according to the next request transmission timing information, or when the management device receives the urgency level information from the managed device via the relay information processing device, The next request transmission timing information is generated using the urgent level information, the next request transmission timing information is transmitted to the relay information processing apparatus and stored in the storage unit of the relay information processing apparatus, Essential The next request transmission timing information is added to the response of the relay information processing apparatus to the transmission, and the managed device that has received the response determines the next request transmission time according to the next request transmission timing information. According to the remote failure management system according to claim 11 or 12, characterized in that, for example, for a managed device having a severe failure and a high degree of urgency, the next inquiry time is assigned to an earlier time, For managed devices with a low degree of urgency, processing such as assigning the next inquiry time to a later time becomes possible, and the balance between the adjustment of traffic volume and the quick response to devices with a high degree of urgency can be made more flexible. Is possible.

  According to the fourteenth aspect of the present invention, there is no request from the managed device in a time zone determined by the first time interval or the second time interval or in a time zone determined by the next request transmission timing information. If it is determined by the management device, it is determined that an abnormality has occurred, a warning is displayed on a display device provided in the management device, or an error log is accumulated in a storage unit provided in the management device, or The relay information processing apparatus determines that there is no request from the managed apparatus in the time period determined by the first time interval or the second time interval or in the time period determined by the next request transmission timing information. If so, it is determined that an abnormality has occurred, and when there is a request from the management device, the Is added as error information and transmitted, and in the management device that has received this information, a warning is displayed on the display device provided in the management device or stored in the storage unit provided in the management device as an error log According to the remote fault management system according to any one of claims 11 to 13, from the managed device during a time period determined by the relay information processing device or the management device side. If it is determined that there is no request, this is accumulated as a warning display or an error log in the management apparatus, so that the administrator can recognize the occurrence of an abnormality.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following embodiment is one form when the present invention is embodied, and is not intended to limit the present invention within the scope thereof.

  FIG. 1 is a block diagram showing an outline of a configuration of an internal network communication system according to the present embodiment. 2 and 3 are flowcharts showing an outline of the processing operation relating to the present invention of each device provided in the inter-network communication system 1.

  As shown in FIG. 1, the internal network communication system 1 of this embodiment improves security by imposing restrictions on communication from the Internet 11 side, which is an external network, by a firewall (13A or 13B). The internal network (14A or 14B) is connected to each other via a network (Internet 11) in which the relay server 12 is arranged.

  A personal computer (hereinafter simply referred to as a PC) 15A (or 15B) as an information processing apparatus includes an output unit 151 serving as an output interface (such as a monitor) for a user, and an input unit 152 serving as an input interface (such as a keyboard and a mouse) for the user. A communication unit 153, a storage unit 154, a control unit 155 that performs arithmetic processing, and the like.

  The relay server 12 serving as a relay information processing apparatus includes an output unit 121 serving as an output interface for a user, an input unit 122 serving as an input interface for a user, a communication unit 123, a storage unit 124, and a control unit that performs arithmetic processing and the like. 125, a communication resource monitoring unit 126 that monitors the load state of communication resources such as a communication line, and an information processing resource monitoring unit 127 that monitors the load state of information processing resources such as a control unit.

  The internal inter-network communication system 1 has the firewalls 13A and 13B, so that information can be transmitted and received between the PC 15A and the PC 15B that cannot communicate directly with each other. In this case, pseudo two-way communication is performed between the PC 15A and the PC 15B via the relay server 12 installed in the above. Specifically, for example, when there is data to be transmitted from the PC 15A to the PC 15B, the PC 15A accesses the relay server 12 and temporarily accumulates the data to be transmitted to the PC 15B in the relay server 12 (for example, Hypertext Transfer Protocol (HTTP)). The data is transferred to the relay server 12 using the POST method). The relay server 12 that has received data transmitted to the PC 15B cannot basically transfer data by accessing the PC 15B from the relay server 12 side (because there is a firewall 13B), but from the PC 15B to the relay server 12. Sending transmission data to the PC 15B from the relay server 12 to the PC 15B as a response to the request by making an inquiry (request) for the presence of transmission data addressed to itself (for example, using an HTTP GET method). As a result, data is transmitted from the PC 15A to the PC 15B, and pseudo two-way communication can be performed between the PC 15A and the PC 15B by repeating the processing. As is clear from this, in order to increase the mutual response, it is necessary to frequently make a request to the relay server 12 (inquiry as to whether there is transmission data addressed to itself).

  Next, an outline of the processing operation of the PC 15A (or 15B) related to the present invention will be described with reference to FIG. This processing basically shows only processing related to data transmission / reception with the PC 15B (or 15A).

  In step 201, the timer 1 is started by the time counting function provided in the control unit 155. In the following step 202, it is determined whether or not the timer 1 has reached a predetermined time. The “predetermined time” is time information set in advance or set by the user, and is stored in the storage unit 154. When the timer 1 reaches “predetermined time”, the process proceeds to step 203 to determine whether or not there is “data to be transmitted”. A “request” including the identification information to be determined and identification information of PC 15B (or 15A)), a transmission source identifier (identification information of PC 15A (or 15B)), and data to be transmitted is generated (step 204). The “request” is a request to store the information (transmission destination identifier, transmission source identifier, transmission data) in the relay server 12. It is assumed that “transmission data” is generated by a user input to the input unit 152, various processes executed by the control unit 155, and the like, and is stored in the storage unit 154.

  In the next step 205, 0 is substituted into the variable e (error count), and a “request” is transmitted to the relay server 12 (step 206). The transmission processing is performed by the control unit 155 and the communication unit 153 (the same applies to the following data transmission or reception processing). If the determination in step 203 is negative (when there is no data to be transmitted), a “request” containing an inquiry about the presence or absence of transmission data addressed to itself is transmitted to the relay server 12.

  In step 208, the response from the relay server 12 is waited, and it is determined whether or not the response includes “next request transmission time information at overload” (step 213). In step S201, the process is repeated (the basic operation is to periodically send a request to the relay server 12 at a "predetermined time"). On the other hand, when the response from the relay server 12 includes “information on next request transmission at the time of overload”, the transmission time of the next “request” is calculated from the “information on next request transmission at the time of overload”. (As described below, for example, when the “information on next request transmission at the time of overload” is time information indicating the transmission time of the next “request”, the time is directly used as “next“ request ”. In the case where the “time information of next request transmission at the time of overload” is time information indicating an interval until the next request transmission, the time when the time information is added to the current time is set to “next“ The request "transmission time" is waited for (step 214), the process proceeds to step 203, and the next "request" transmission process is performed.

  If the content of the response received from the relay server 12 is “failure (such as failure in receiving“ request ”from the PC 15A in the relay server 12)” (step 209), or there is no response from the relay server 12 If a timeout occurs (when there is no response from the relay server 12 at a predetermined time) (step 207), e (error count) is incremented (step 210), and e becomes 3 (Step 211), if less than three times, return to step 206 to perform retransmission processing, and if the transmission fails three times, record an error log in the storage unit 154 ( At this time, the output unit 151 may display that an error has occurred, etc.) The process proceeds to step 213 and the following processing is repeated.

  Next, an outline of the processing operation of the relay server 12 relating to the present invention will be described with reference to FIG. This process basically shows only the process related to mediation of data transmission / reception between the PC 15A and the PC 15B.

  In step 301, it is determined whether or not a request has been received from the PC 15A (or PC 15B) (the process is performed by the communication unit 123 and the control unit 125). If there is this, the request includes “transmission data”. (Step 302), if there is, the “transmission destination identifier”, “transmission source identifier”, and “transmission data” are associated with each other to the communication content DB formed in the storage unit 124. (Step 303), and the communication history (communication partner information, communication time information, etc.) is stored in the communication history DB (step 304).

  In step 305, the control unit 125 refers to the communication content DB to determine whether or not there is “transmission data” for the partner that received the request in step 301 by using the “transmission destination identifier” as a key, If this occurs, the “transmission data” and the “transmission source identifier” associated therewith are acquired from the communication content DB, and a “response” including these pieces of information is generated (step 306). If there is no “transmission data” for the other party who received the request in step 301, a “response” indicating that “request” has been received (or reception has failed) is generated.

  In step 307, it is determined whether the communication resource or the information processing resource is in an overload state. The determination processing is performed by the control unit 125 and the communication resource monitoring unit 126 or the information processing resource monitoring unit 127. For example, the communication line usage rate (the ratio of the communication amount to the line capacity) or the control unit usage rate (processing capability). The ratio of the transaction amount to the above) is calculated, and when these values exceed a predetermined value, it is determined as “overloaded”.

  If it is determined that the communication resource or the information processing resource is in an overload state, the process proceeds to step 308 to calculate the “communication time delay time”, and from the “communication time delay time” to the “next overload time” "Request transmission time information" is generated and added to "response" (step 309). “Communication time delay time” indicates a “period” during which access to the self (relay server 12) is restricted because it is busy, and the calculation of the “communication time delay time” is, for example, as described above. A table in which the “use rate” of the communication line or the control unit is associated with time information (for example, 5 minutes when the use rate is 50%) and stored (that is, the delay time depends on the overload state) (Predetermined table) is stored in the storage unit 124 in advance to obtain a “communication time delay time” corresponding to the “usage rate”. By pre-determining or calculating an average value of the processing time required for the processing of “request”, the traffic amount is calculated using the average value, and each PC is set so that the traffic amount does not exceed a predetermined value. from "Communication time delay time" so that a "request" is sent, "Communication time delay time" is calculated by multiplying a predetermined time information by a coefficient using "Usage rate", or a predetermined When it is known in advance that the period will be busy (for example, when a predetermined batch process is performed), the time until the end of the period is calculated as the “communication time delay time”, etc. It may be. “The next request transmission timing information at the time of overload” may be generated, for example, as time information obtained by adding 10 minutes to the current time using the “communication timing delay time (for example, 10 minutes)”. Alternatively, it may be one that uses the “communication time delay time” as it is (for example, time information of “10 minutes”).

  In step 310, a “response” is sent out, the process returns to step 301, and the processing described above is repeated.

  FIG. 4 is a sequence diagram for explaining the outline of the operation of the inter-network communication system 1. First, an inquiry (transmission of “request”) is made from the PC 15B to the relay server 12 as to whether there is any transmission data addressed to itself. At this time, there is no transmission data addressed to the PC 15B, so Nothing is added to. When there is an inquiry from the PC 15B after the data is transmitted from the PC 15A, the data from the PC 15A is added to the response and transmitted to the PC 15B (this causes the data to be transmitted from the PC 15A to the PC 15B). ) Thereafter, both the PC 15A and PC 15B periodically send a “request” to the relay server 12. However, the relay server 12 becomes busy at time t1, and the response to the “request” after time t1 is “overload”. Next request transmission time information "is added and transmitted to the PC 15A and PC 15B, respectively. The PC 15A and PC 15B that have received this send the next “request” (at time t4 and time t5), respectively, according to “overload next request sending information”. At this time, when the relay server 12 is still busy, a response to which “next request transmission information at the time of overload” is added is sent again, while when the relay server 12 is not busy, Thereafter, a “request” is periodically sent to the relay server 12 from both the PC 15A and the PC 15B.

  As described above, according to the internal network communication system 1 of the present embodiment, the PC (information processing apparatus) provided in the internal network and the PC provided in another internal network are connected via the relay server. It is possible to send and receive information between them. In addition, for example, when the relay server is in an overload state, it is possible to prevent each PC from sending a request to the relay server for a while, so that resources (for example, communication lines) are overloaded. Occurrence of an exponentially increasing processing delay due to a vicious cycle of sometimes traffic concentration and further load increase can be suppressed. This makes it possible to reduce the amount of resources such as communication lines constituting the system at the time of system design, and to construct a system at low cost.

  In the present embodiment, the load state of the resource is monitored by the relay server 12. However, as shown in FIG. 5 (the same reference numerals are used for the same components as in FIG. 1), the internal network When the information processing device 17X provided in the 14X includes the communication resource monitoring unit 176 and the information processing resource monitoring unit 177 to monitor the resources of the information processing device 17X, and is determined to be in an overload state In this case, “next request transmission timing information at overload” for each PC 15 may be transmitted to the relay server 12 (although there is a difference between “response” and “request”, the processing concept is This is the same as step 307 to step 310 in FIG. This is particularly effective when the information processing apparatus 17X provides a certain service and there is an access from a plurality of PCs 15 (indirect access via the relay server 12). In the internal network communication system of FIG. 5, the relay server 12 is provided on the DMZ segment 16X.

  In this embodiment, the transmission data is transmitted to the other PC 15 when the periodic “request” is transmitted from the PC 15 to the relay server 12 (the process shown in FIG. 2). It is also possible to transmit data whenever necessary. FIG. 6 shows an outline of such an occasional data transmission process. The same processing concept as in FIG. 2 is used with the same reference numerals and will not be described here. However, when a transmission request is generated, the processing in FIG. 6 is executed, and the transmission source identifier, transmission destination identifier, transmission A “request” having data is generated (step 204), and when the next request transmission time is limited (step 601), after waiting for this progress (step 214), the request is transmitted to the relay server 12. Send a “request” with data.

  Further, the “next request transmission timing information at the time of overload” transmitted from the relay server 12 is used as information of “predetermined time” which is a time interval when the PC 15 periodically transmits “request”. The received PC 15 may perform a process of sending a “request” to the relay server 12 at a time interval according to “next request sending timing information at overload”. FIG. 7 shows an outline of the processing (the same reference numerals are used for the same processing concept as in FIG. 2). When “overload next request transmission timing information” is received, “predetermined time” is changed according to the information (step 701), the process returns to step 201, and the following processing is repeated. Thereby, it is possible to instruct the time interval of transmission of “request” of the PC 15 from the relay server 12 side. For example, when the relay server 12 is overloaded, transmission of “request” of the PC 15 It is possible to perform a process that increases the time interval.

  FIG. 8 is a block diagram showing an outline of the configuration of the remote fault management system of this embodiment. Note that the same reference numerals are used for components that are the same as those in the first embodiment (FIG. 1), and description thereof is omitted or simplified here. 9 to 11 are flowcharts showing an outline of the processing operation relating to the present invention of each device provided in the remote fault management system 8. FIG.

  As shown in FIG. 8, the remote failure management system 8 of the present embodiment includes an internal network segment 14 whose security is improved by imposing restrictions on communication from the Internet 11 side, which is an external network, by a firewall 13. A local network 80 within the administrator, which is configured by a “manager” side system formed by a DMZ (DeMilitized Zone) segment 16, and a plurality of “customer” side internal networks 14 constitute a network (Internet 11). Configured by being connected to each other.

  The managed server 23 that is a managed device includes an output unit 231, an input unit 232, a communication unit 233, a storage unit 234, a control unit 235 that performs arithmetic processing, and a monitoring agent 238 that monitors the occurrence of a failure. Etc. The monitoring agent may be configured in software or hardware, and configured as a monitoring device that is physically separate from the managed server. (The managed server 22 and the monitoring device 21 in FIG. 8) may be used (in this case, the “managed device” is configured by the managed server 22 and the monitoring device 21).

  The management server 18 that is a management device is provided in the internal network segment 14 of the intra-administrator local network 80, and includes an output unit 181, an input unit 182, a communication unit 183, a storage unit 184, a control unit 185, information A processing resource monitoring unit 187; The internal network segment 14 is provided with various DBs 19 such as a database in which failure information is stored, various business servers (not shown), a PC (not shown) serving as a client, and the like. A relay server 12 is provided on the DMZ segment 16.

  An outline of the processing operation of the managed server 23 relating to the present invention will be described with reference to FIG. Note that the same reference numerals are used for the same processing concept as in the first embodiment (FIG. 2), and the description here is omitted or simplified.

  In step 201, the timer 1 is started, and until the timer 1 reaches the first time interval (predetermined or user-set time information, for example, 24 hours) (step 202), the monitoring agent When a failure of the apparatus is detected by 238 (step 901), a failure countermeasure process (the process shown in FIG. 10) is executed (step 902).

  Steps 205 to 212 executed after the elapse of the “first time interval” are the same processing concept as in the first embodiment (FIG. 2). Inquiry about presence / absence of instruction) ”is transmitted.

  Since the “response” from the relay server 12 includes “next request transmission timing information at overload” (step 213), the next “request” determined by the “next request transmission information” is determined. If a failure of the apparatus is detected by the monitoring agent 238 (step 903) until the transmission time is reached (step 214), failure countermeasure processing is executed (step 904).

  FIG. 10 is a flowchart showing an outline of the operation related to the transmission / reception of information with the management apparatus 18 in the processing operation of “fault countermeasure processing”.

  When “fault countermeasure processing” is executed, a transmission destination identifier (identification information that uniquely defines the management server 18 and stored in advance in the storage unit 234), transmission source identifier, and failure information (obtained by the monitoring agent 238) A “request” including information on the failure to be generated is generated (step 1001). In the subsequent step 1002, transmission processing of the “request” to the relay server 12 is performed. The “request transmission process” in step 1002 has the same processing concept as the processes in steps 205 to 212 in FIG.

  After sending the “failure information” to the management server 18 via the relay server 12, the timer 3 is started in step 1003. In the next step 1004, it is determined whether or not the response from the relay server 12 includes “next request transmission timing information at the time of overload”. If there is not, the timer 2 is started (step 1006). 2 is a case where the second time interval (predetermined or user-set time information, for example, 10 minutes) has elapsed (or "next overload request information on overload" is added) Then, when the transmission time of the next “request” determined by the “information on next request transmission at the time of overload” has arrived (step 1005), the “request (from the management device 18) to the relay server 12” Inquiry about presence / absence of instruction) ”transmission processing is performed (step 1008 (processing concept similar to the processing in steps 205 to 212 in FIG. 9)).

  In the next step 1009, it is determined whether or not the “response” from the relay server 12 includes the “instruction regarding failure information transmitted from the managed server 23” from the management server 18. Then, the process according to the instruction is performed (step 1010), and the “failure countermeasure process” is terminated. In addition, before the timer 3 passes a third time interval (predetermined or time information set by the user, for example, 2 hours), the “transmission from the managed server 23” from the management server 18 Even if there is no “instruction regarding failure information”, the “failure countermeasure processing” is ended, and the processing of step 1004 to step 1009 is repeated until the third time interval elapses (step 1011). When the “fault countermeasure processing” is completed, the processing returns to step 201 in FIG. 9 and the processing is repeated (steps 902 and 904).

  Through the above processing (FIGS. 9 and 10), in the normal time (when there is no failure), the relay server 12 is basically inquired at the first time interval (for example, every 24 hours), and a failure occurs. Sometimes, until there is a response from the management server 18 or until a third time interval (for example, 2 hours) elapses, basically the second time interval (for example, an interval of 10 minutes) An inquiry is made, and when “next request transmission timing information at overload” is received, the inquiry to the relay server 12 is made at a timing according to the information. In the process shown in FIG. 9, when the occurrence of a failure is detected, this is prioritized and “failure information” is immediately transmitted regardless of the presence / absence of “next request transmission timing information during overload”. However, the processing may be such that “failure information” is transmitted at a timing according to “next request transmission timing information at overload”. Further, the processing shown in FIG. 9 is omitted because it mainly shows only the part related to the “request” transmission processing of the managed server 23, but the “response” from the relay server 12 includes an instruction from the management server 23. In such a case, processing according to the instruction is performed.

  Next, an outline of the processing operation of the management server 18 relating to the present invention will be described with reference to FIG. This process particularly indicates a processing part related to data transmission / reception with the managed server 23.

  In step 1101, the timer 1 is started. When the timer 1 reaches a predetermined time (time information set in advance or set by the user and stored in the storage unit 184), the process proceeds to step 1103. (Step 1102), it is determined whether or not there is “data to be transmitted”, and if there is, a “request” including a transmission destination identifier, a transmission source identifier, and data to be transmitted is generated ( Step 1104). In subsequent step 1105, “next overload request transmission time information” generation / addition processing (processing concept similar to step 307 to step 309 in the first embodiment (FIG. 3)) is performed. In step 1106, the relay server 12 The “request” transmission process is performed (the same processing concept as the process from step 205 to step 212 in FIG. 9).

  The “response” from the relay server 12 in response to the “request (inquiry as to whether data transmission from the managed server)” includes “failure information (failure information transmitted from the failed managed server 23)”. If it is determined (step 1107), processing such as determination of the failure content is performed from the failure information, and an instruction (failure countermeasure instruction) for the managed server 23 is generated as necessary (step 1108). In the subsequent step 1109, a “request” including a transmission destination identifier (identification information of the managed server 23 in which the failure has occurred), a transmission source identifier (identification information of the management server 18), and failure countermeasure instruction information is generated ( It is sent to the relay server 12 in step 1111 (process similar to step 1106) after step 1110) and step 1110 (process similar to step 1105). The “failure information” includes, for example, the product ID and error code of the device (managed server 23) in which the failure has occurred, and the management server 18 that has received the product information DB includes the product information DB and the error provided in the DB 19. Referring to the code DB, factor identification dictionary DB, patch DB, etc., the product and the content of the failure are identified (identifying the part in which the failure has occurred and identifying the cause of the failure), and the necessary information seems to be insufficient In such a case, an instruction is sent to the managed server 23 to collect necessary information, or if there is a patch file for a failure, the managed server 23 is instructed to execute it. Processing such as sending an instruction is performed (these “information collection instruction”, “patch application instruction”, etc. correspond to “failure countermeasure instruction”).

  If the determination in step 1107 is negative (when there is no failure information), or after the processing in steps 1108 to 1111, the request (inquiry about whether or not there is data transmission from the managed server) It is determined whether or not other information is included in the “response” from the relay server 12 (step 1112), and if it is present, various processes corresponding to the information are performed (step 1113). This processing is performed, for example, when the managed server 23 collects and transmits necessary information in response to the above-described “information collection instruction”, or in response to the “patch application instruction”. When an execution result is transmitted, processing corresponding to each (such as failure content analysis processing or failure countermeasure end processing) is executed.

  Steps 1114 to 1115 are the same processing concept as Steps 1004 to 1005 in FIG. 10. If there is no “overload next request transmission timing information” from the relay server 12, the process returns to Step 1101. When there is “next request transmission timing information at overload”, the process waits for the arrival of the next request transmission timing, proceeds to step 1103, and repeats the processing. Through these processes, basically, a “request” is sent from the management server 18 to the relay server 23 at intervals of “predetermined time”, and when there is an instruction of the sending time from the relay server 23. Accordingly, a “request” is transmitted. In the processing shown in FIG. 11, when failure information is transmitted from the managed server 23, priority is given to this, and “failure countermeasures” is performed regardless of the presence / absence of “next request transmission timing information at overload”. Although the “instruction” is sent immediately, the “failure countermeasure instruction” may be sent at a time according to the “next request sending time information at overload”.

  The processing operation of the relay server 12 is the same concept as in the first embodiment (FIG. 3).

  As described above, according to the remote failure management system 8 of the present embodiment, for example, during normal times, requests are sent from the managed server 23 to the relay server 12 at a rate of once a day (first time interval) (management server). The management server for the failure occurrence notification transmitted at 10 minute intervals (second time interval) for 2 hours (third time interval) when a failure occurs. Since it is possible to inquire the relay server 12 about whether there is a response from 18, it is possible to make an inquiry from a device in which a failure has not occurred (particularly a device that does not require quick response) at a long time interval. Prompt processing by suppressing an increase in the amount of transactions (traffic) that occurs in the relay server 12 and the like, and inquiring from a faulty device at short time intervals Possible such causes become. Further, for example, a failure occurs in a large number of devices at the same time, and an inquiry (transmission of a request) from each device to the relay server 12 is performed at a short time interval (second time interval). Alternatively, when an overload condition occurs in the management server 80, the relay server 12 or the management server 80 can instruct the managed server 23 to delay the next inquiry time. Generation of useless traffic (for example, no matter how many inquiries are made from the managed server 23 in a situation where the management server 80 is busy and cannot send an instruction to the managed server 23), generation of unnecessary traffic can be suppressed. , Processing delays are exponential due to the vicious cycle of traffic concentration and further load increase when resources (such as communication lines) are overloaded It is possible to suppress the occurrence of a situation such as increases.

  In the generation processing of “next request transmission timing information at overload” in the management server 18 of the present embodiment, the “inquiry” timing from the managed server 23 is delayed when a “resource overload state occurs”. Although only “what to do” is shown, it is possible to generate “next request transmission timing information” so as to advance the “inquiry” timing from the managed server 23 as necessary. In this way, for example, when the upgrade timing of a new patch file for a certain product is fixed to some extent, “next time” is performed so that an “inquiry” is made from the managed server 23 immediately after the upgrade. By determining and transmitting “request transmission time information”, it becomes possible to perform a quick product update process.

  FIG. 21 to FIG. 24 are flowcharts showing the outline of the processing operation related to the present invention of each device provided in the remote fault management system. Note that the configuration of the remote fault management system of this embodiment is the same as that of the second embodiment (FIG. 8), so the description thereof will be omitted and will be described with reference to FIG. 8 when necessary.

  The outline of the processing operation related to the present invention of the managed server 23 in this embodiment will be described with reference to FIG. Note that the same reference numerals are used for the same processing concept as in the second embodiment (FIG. 9), and description thereof is omitted or simplified here.

  When the monitoring agent 238 detects a failure of the apparatus (step 901), a failure countermeasure process (the process shown in FIG. 22) is executed (step 902).

  In step 2101, it is determined whether or not “next request transmission time” described below has been reached. In accordance with the processing concept, a “request (inquiry as to whether there is an instruction from the management apparatus 18)” is transmitted to the relay server 12.

  In step 2102, “next request transmission timing information” added to the response from the relay server 12 in response to the request is acquired (in the next step 2101, “next request transmission timing information” based on the “next request transmission timing information” is acquired. If the response includes an instruction from the management server 18 (step 2103), the process according to the instruction is executed (step 2104), and the process goes to step 901. And the following processing is repeated. “Next request transmission timing information” is a concept including “next request transmission timing information at overload”, and will be described in detail below. And the next request transmission time information at the time of overload) and the “next request transmission time information at the time of overload” generated by the relay server 12. When both the “next request transmission timing information” added by the management server 18 and the “next request transmission timing information at the time of overload” added by the relay server 12 are received in the processing in the step 2102, any information is received. Whether to determine the “next request transmission timing” used in step 2101 based on the above is appropriately selected based on the design concept of the system (for example, considering the operation of the overloaded device, the latest timing) However, the information from the management server 18 is given priority, but the information from the management server 18 is not the “next request transmission timing information at the time of overload” but the normal information. When “next request transmission timing information” is transmitted and “next request transmission timing information at overload” is transmitted from the relay server 12, “overload” from the relay server 12 is transmitted. Such as a process to give priority to the next request delivery time information ").

  FIG. 22 is a flowchart showing an outline of the part of the processing operation of “fault countermeasure processing”, particularly the part related to transmission / reception of information with the management device 18. Note that the same reference numerals are used for the same processing concept as in the second embodiment (FIG. 10), and description thereof is omitted or simplified here.

  After Step 1002 and Step 1008 in which “request” transmission processing to the relay server 12 is performed, processing for acquiring “next request transmission timing information” added to the response from the relay server 12 to the request (described above) 21 is performed (steps 2201 and 2202). In step 1005, the arrival of the “next request transmission timing” based on the acquired “next request transmission timing information” is waited for and relayed. Processing for transmitting a “request” to the server 12 is performed (step 1008).

  The outline of the processing operation related to the present invention of the management server 18 of the present embodiment is basically the same as that of the second embodiment (FIG. 11), but the management server 18 of the present embodiment is shown in step 1105 of FIG. 23 “next request transmission time information addition processing” is executed, and in step 1110 of FIG. 11, “next request transmission time information addition processing” of FIG. 24 is executed. Steps 307 to 309 of “next request transmission timing information addition processing” in FIG. 23 are the same concept as the processing in steps 307 to 309 in FIG. If the determination result in step 307 is negative (if the communication resource or processing resource is not in an overload state), the “next request transmission timing information” at normal time is generated, and this is sent to the relay server 12. It is added to the request (step 2301). Note that the “next request transmission timing information” in the normal time is determined such that a request from the managed server 23 to the relay server 12 is transmitted at intervals of 24 hours (first time interval in the second embodiment), for example. Information.

  Steps 307 to 309 of “next request transmission timing information addition processing” in FIG. 24 are the same concept as the processing in steps 307 to 309 in FIG. If the determination result in step 307 is negative, “next request transmission timing information” at the time of failure is generated and added to the request to the relay server 12 (step 2401). The “next request transmission timing information” at the time of failure is, for example, that a request from the managed server 23 to the relay server 12 is transmitted at an interval of 10 minutes (second time interval in the second embodiment). Information to be determined.

  The processing operation of the relay server 12 is the same concept as in the first embodiment (FIG. 3).

  As described above, in the remote fault management system of this embodiment, the “next request transmission timing information” (including the next request transmission timing information at the time of overload) is always generated by the management server 18 and is transmitted via the relay server 12. By transmitting the request to the relay server 12 at the “next request transmission timing” based on the information, the management server 18 transmits the request to the management server 23. The timing of sending requests can be managed. Thus, as in the second embodiment, for example, during normal times, a request is sent from the managed server 23 to the relay server 12 at a rate of once a day (first time interval) (whether there is an instruction from the management server 18). No response is received from the management server 18 for the transmitted failure occurrence notification at 10 minute intervals (second time interval) for 2 hours (third time interval) when a failure occurs. It is also possible to execute a process such as inquiring the relay server 12 for this.

  In this embodiment, the “next request transmission timing information” (including the next request transmission timing information at the time of overload) is generated by the management server 18, but the processing in the relay server 12 is as shown in FIG. By using (the same reference numerals are used for the same processing concept as in the first embodiment (FIG. 3)), the relay server 12 causes the “next request transmission timing information” (including the next request transmission timing information during overload). It may be generated (step 2501) (further proceeding, the relay server 12 determines whether or not failure information is added to the request from the managed server 23, and if this is the case, a failure occurs. “Next request transmission timing information” may be generated by the relay server 12).

  FIG. 12, FIG. 14, FIG. 17 to FIG. 19 are flowcharts showing the outline of the processing operation related to the present invention of each device provided in the remote fault management system of this embodiment. Note that the configuration of the remote fault management system of this embodiment is the same as that of the second embodiment (FIG. 8), so the description thereof will be omitted and will be described with reference to FIG. 8 when necessary.

  Assume that a failure urgency level table in which failure information and urgency level information are stored in association with each other is preset and saved in the storage unit 234 of the managed server 23 according to the present embodiment. FIG. 13 shows an outline of an example of the failure urgency level table. In the failure urgency level table 130, an error code that is failure information and numerical data that is urgency information (the larger the value, the higher the urgency level) are stored in association with each other. The operational concept of the processing related to the present invention of the managed server 23 of this embodiment is the same as that of the second embodiment (FIG. 9), but the “failure countermeasure processing” called by the processing (steps 902 and 904) of FIG. In this embodiment, the processing is as shown in FIG. Note that the same reference numerals are used for the same processing concept as in the second embodiment (FIG. 10), and description thereof is omitted or simplified here.

  When “fault countermeasure processing” is executed, the emergency level information corresponding to the fault information (information about the fault acquired by the monitoring agent 238) is acquired with reference to the fault urgency level table 130 (step 1201). In subsequent step 1202, a “request” including a transmission destination identifier, a transmission source identifier, failure information, and urgency information is generated, and in step 1002, transmission processing of the “request” to the relay server 12 is performed.

  When the “instruction regarding the failure information transmitted from the managed server 23” is received from the management server 18 by the processing of Step 1003 to Step 1011 or when the third time interval elapses without receiving the information In addition, a “request” including information for returning the urgency level to normal (for example, when “0” is assigned as urgency level information indicating normality, a “request” with the urgency level information set to “0”) Or a “request” for deleting the corresponding data from the failure occurrence device table described below (step 1203), and transmits the “request” to the relay server 12 (step 1204).

  Next, an outline of processing operations related to the present invention of the relay server 12 of the present embodiment will be described with reference to FIG. Note that the same reference numerals are used for the same processing concept as in the first embodiment (FIG. 3), and description thereof is omitted or simplified here.

  When there is a “request” from the managed server 23, it is determined whether or not the “request” includes urgency information (step 1401). The urgency level information is stored in the failure generation device table (an outline of an example of the failure generation device table is shown in FIG. 15) in association with the server 23 identification information) and stored in the storage unit 124 (step 1402). If a “request” is sent from the managed server 23 including information for returning the urgency level to normal (FIG. 12: step 1203 to step 1204), the processing in steps 1401 to 1402 is performed. Update processing of the faulty device table 150 is performed.

  If it is determined in step 307 that the resource is in an overload state, the source identifier corresponding to the managed server 23 (the device that transmitted the “request”) is urgently referred to by referring to the failure occurrence device table 150. It is determined whether or not the degree information is associated, and the “communication time delay time” is generated using the urgency degree information (step 1403). The “generation of“ communication time delay time ”using urgency information” is performed using the urgency information in the “communication time delay time” calculation processing concept described in the first embodiment. By setting in advance a table in which the urgency information and the communication time delay time are associated with each other (and may also be associated with the “usage rate” of the resource), the communication is performed with reference to the table. It may be performed by acquiring the “time delay time”, or the amount of traffic that will occur in the future is predicted with reference to the failure occurrence device table 150, and the urgency information of the managed server 23 that has transmitted the “request” The “communication time delay time” is determined based on (for example, if there is a device with a higher degree of urgency than the device that has transmitted the “request” with reference to the failure occurrence device table 150, In order to prioritize the processing of these devices, calculate the “high priority traffic volume” that will occur in the future from the number of “devices with higher urgency than the device that sent the request” and the average processing time. In order to ensure the processing of these traffics, the “communication time delay time” of the device that has transmitted the “request” may be determined.

  In step 1404, from the next request transmission time information generated in step 309 (or from the communication time delay time generated in step 1403), the next “request” from the managed server 23 that has transmitted the “request”. Time information that should be calculated is calculated, associated with the identifier of the managed server 23, stored in the next communication table, and stored in the storage unit 124 (step 1404). FIG. 16 shows an outline of an example of the next communication table.

  FIG. 17 is a flowchart showing an outline of the communication status monitoring process of the managed server 23 in the relay server 12. In step 1701, it is determined whether or not there is one whose “next request transmission time” has passed by referring to the next communication table 160, and if there is, the communication history DB of the storage unit 124 is referred to, and It is determined whether or not there is communication from the device having the identifier to be executed (step 1702). If it is determined that this has not occurred, the identifier of the device and the error information are associated with each other and stored in the communication history table and stored in the storage unit 124 (step 1703). FIG. 20 shows an outline of an example of the communication history table. The communication history table 200 has a configuration in which an identifier, a time when communication is scheduled (that is, “next request transmission time”), and an error detection time (time when it is determined that there is no communication) are associated with each other. Yes. Note that the criteria for determining that there was no communication at the scheduled time is a predetermined (system configuration and design philosophy) based on the “next request transmission time” in consideration of the overhead of each device and communication delays. It may be determined based on whether or not there is communication within a range (determined appropriately based on

  The data for which the determination of the communication status is completed is deleted from the next communication table 160 (step 1704), and thereafter, the process returns to step 1701 to repeat the process. In the processing from step 305 to step 306 in FIG. 14, when the management server 18 has sent “request”, the communication history table 200 is referred to and has not yet been transmitted to the management server 18. When there is error information, the information associated with the identifier is added to the “response” as “transmission data”, so that information related to “the device for which the scheduled communication has not been performed” is stored in the management server 18. Send to.

  Next, an outline of processing operations related to the present invention of the management server 18 of the present embodiment will be described with reference to FIG. Note that the same reference numerals are used for the same processing concept as in the second embodiment (FIG. 11), and the description here is omitted or simplified.

  After sending the “request” to the relay server 12 (and receiving the “response”) in steps 1101 to 1106, in step 1802, the “response” from the relay server 12 is sent to “transmission from the managed server 23. It is determined whether or not the urgency level information is included, and if it is present, the urgency level information is associated with the transmission source identifier (identification information of the managed server 23) and the fault occurrence device table (see FIG. 15 and stored in the storage unit 184 (step 1803).

  The processing concept of the generation / addition processing (steps 1801 and 1804) of “next request transmission timing information at the time of overload” performed before the transmission processing of “request” to the relay server 12 (steps 1106 and 1111) is shown in FIG. 14, the next communication table (similar to FIG. 16) stored in the storage unit 184 of the management server 18 is updated.

  FIG. 19 is a flowchart showing an outline of the communication status monitoring process of the managed server 23 in the management server 18. Note that the same reference numerals are used for the same processing concept as in FIG. 17, and description thereof is omitted or simplified here.

  If there is one whose “next request transmission time” has passed with reference to the next communication table, a “request” for inquiring the relay server 12 about the communication history of the device with the corresponding identifier is generated (step 1901). This is transmitted to the relay server 12 (step 1902). In response to this, the relay server 12 generates a “response” including the communication history of “apparatus with the corresponding identifier” by referring to the communication history DB (the processing in step 305 to step 306 in FIG. 14). Is transmitted to the management server 18. The management server 18 refers to this and determines whether or not there is communication from the “apparatus with the corresponding identifier” (step 1903). If it is determined that this has not occurred (and error information is included in the “response” from the relay server 12 (FIG. 18: step 1805)), a warning to that effect is output to the output unit 181 ( In step 1904, the identifier of the device and the error information are associated with each other, stored in the communication history table (similar to FIG. 20), and stored in the storage unit 184 (step 1703).

  For the sake of easy understanding, the processing in FIG. 19 has been described separately from FIG. 18, but the processing in FIG. 19 is executed in the processing in FIG. 18 (that is, in steps 1103 to 1104 in FIG. 18. 19 in Steps 1701 to 1901 and Steps 1112 to 1113 in FIG. 18 are processed in Steps 1903 to 1704 in FIG.

  As described above, according to the remote failure management system of the present embodiment, for example, the next inquiry time is early for a managed server having a serious failure and a high degree of urgency (requiring quick response). For managed servers with low urgency assigned to the time, it is possible to perform processing such as assigning the next inquiry time to a later time, and to balance the adjustment of traffic volume and quick response to devices with high urgency. It becomes possible to take it flexibly. In addition, if it is determined that there is no “request” from the managed server during the time period determined by the relay server or the management server, this is accumulated in the management server as a warning display or error log. It is possible to recognize the occurrence of an abnormality on the side.

  In this embodiment, the “emergency level information” is added and transmitted on the managed server side. However, by providing the management server (or relay server) side with the failure urgency level table, the managed server Only the error code may be transmitted from the side, and the urgency level may be determined by referring to the failure urgency level table on the management server (or relay server) side that has received the error code.

  In addition, when a failure is detected on the managed server side, the user may be requested to input urgency level information and the input urgency level information may be transmitted, or the contents of the failure urgency level table may be transmitted to the user. The contents of the failure urgency table on the managed server side may be updated from the management server side (in this way, various kinds of failure information are accumulated every day). Can reflect the information on the management server side that is useful).

  In each of the above embodiments, the concept of the present invention is divided and described. However, the concept of the present invention is not limited to each of the embodiments, but the processing concepts described above are combined. (For example, in the fourth embodiment, the concept of the third embodiment ("next request transmission timing information" is generated by the management server 18 so that the management server 18 manages the request transmission timing of the managed server 23). Stuff)).

Block diagram showing outline of configuration of internal network communication system A flowchart showing an outline of processing operations of the information processing apparatus (PC) according to the present invention. A flowchart showing an outline of processing operations of the relay server according to the present invention. Sequence diagram for explaining the outline of the operation of the internal network communication system Block diagram showing an outline of the configuration of another internal network communication system Flow chart showing the outline of data transmission processing at any time A flowchart showing an outline of another processing operation of the information processing apparatus (PC) related to the present invention. Block diagram showing the outline of the configuration of the remote fault management system Flowchart showing an outline of processing operations relating to the present invention of a managed apparatus (managed server) A flowchart showing an outline of processing operations related to the present invention for failure countermeasure processing of a managed device A flowchart showing an outline of processing operations of the management apparatus (management server) related to the present invention. The flowchart which showed the outline of the processing operation regarding the present invention of the fault countermeasure processing of Example 4 The figure which shows the outline of an example of a failure emergency degree table The flowchart which showed the outline of the processing operation regarding this invention of the relay server of Example 4. FIG. The figure which shows the outline of an example of a failure generator table Diagram showing an example of the next communication table Flowchart showing the outline of the processing operation of the relay server communication status monitoring process The flowchart which showed the outline of the processing operation regarding the present invention of the management server of Example 4. A flowchart showing an outline of the processing operation of the communication status monitoring process of the management server The figure which shows the outline of an example of a communication history table The flowchart which showed the outline of the processing operation regarding this invention of the managed apparatus (managed server) of Example 3. FIG. The flowchart which showed the outline of the processing operation regarding this invention of the failure countermeasure processing of the managed apparatus of Example 3. FIG. The flowchart which showed a part of processing operation regarding the present invention of the management apparatus (management server) of Example 3. FIG. The flowchart which showed a part of processing operation regarding the present invention of the management apparatus (management server) of Example 3. FIG. A flowchart showing an outline of another processing operation of the relay server according to the present invention. Conceptual block diagram of an internal network connected via the Internet

Explanation of symbols

1 Internal network communication system 8 Remote failure management system 11 Internet (network)
12 Relay server (relay information processing device)
13A / 13B Firewall 14A / 14B Internal network 15A / 15B PC (Information processing equipment)
16X DMZ segment (unarmed segment)
18 Management server (management device)
21 Monitoring device 23 Managed server (managed device)
123/153 Communication unit 124/154 Storage unit 125/155 Control unit 126 Communication resource monitoring unit 127 Information processing resource monitoring unit 130 Failure urgency table 150 Failure occurrence device table 181 Output unit (display device)
200 Communication history table

Claims (35)

  An internal network communication system having a plurality of internal networks each including an information processing apparatus having a communication unit, the plurality of internal networks being connected to each other via a network, on the network or By arranging the relay information processing device including the communication unit and the storage unit on the non-armed segment, the first information processing device provided in the first internal network and the second information provided in the second internal network Storage of the relay information processing apparatus by transmitting information transmitted to and received from the information processing apparatus from the first or second information processing apparatus to the relay information processing apparatus from the communication unit The request information and the response information from the second or first information processing device to the relay information processing device. Sometimes, the information from the first or second information processing device accumulated in the storage unit of the relay information processing device is added to the response and transmitted from the communication unit of the relay information processing device. 2 or the first information processing apparatus is made to receive the information, and the information that determines the next request transmission time is added to the response of the relay information processing apparatus in response to the request from the second or first information processing apparatus and transmitted. Then, the second or first information processing apparatus that has received this determines the next request transmission time according to the next request transmission timing information, and the relay information processing apparatus is overloaded with communication resources or information processing resources. If it is determined that the relay information processing apparatus responds to the request from the second or first information processing apparatus, the next request transmission at the time of overload is sent. The second or first information processing apparatus that has transmitted and added information for determining the timing determines the next request transmission time according to the next request transmission timing information at the time of overload. Alternatively, the next request transmission timing information is transmitted from the first or second information processing apparatus to the relay information processing apparatus and stored in the storage unit of the relay information processing apparatus, and the second or first information processing is performed. The next request transmission timing information is added to the response of the relay information processing apparatus in response to the request from the apparatus and transmitted, and the second or first information processing apparatus that has received the next transmission transmits the next request according to the next request transmission timing information. When the first or second information processing apparatus determines that the communication resource or the information processing resource is overloaded, the first or second The next request transmission timing information at the time of overload is transmitted from the information processing device to the relay information processing device and stored in the storage unit of the relay information processing device, and the request for the request from the second or first information processing device The response information of the relay information processing apparatus is added with the next request transmission time information at the time of overload and transmitted, and the second or first information processing apparatus that has received the response transmits the next time according to the next request transmission time information at the time of overload. A communication system between internal networks, characterized by determining when a request is sent.   An internal network communication system having a plurality of internal networks each including an information processing apparatus having a communication unit, the plurality of internal networks being connected to each other via a network, on the network or By arranging the relay information processing device including the communication unit and the storage unit on the non-armed segment, the first information processing device provided in the first internal network and the second information provided in the second internal network Storage of the relay information processing apparatus by transmitting information transmitted to and received from the information processing apparatus from the first or second information processing apparatus to the relay information processing apparatus from the communication unit The request information and the response information from the second or first information processing device to the relay information processing device. Sometimes, the information from the first or second information processing device accumulated in the storage unit of the relay information processing device is added to the response and transmitted from the communication unit of the relay information processing device. 2 or the first information processing apparatus, and in the transmission / reception of information between the first information processing apparatus and the second information processing apparatus, the second or first information is normally transmitted. When the processing device transmits a request to the relay information processing device at predetermined intervals, and the relay information processing device determines that the communication resource or the information processing resource is overloaded, the second or second The information which determines the next request transmission time at the time of overload is added to the response of the relay information processing apparatus in response to the request from the information processing apparatus 1 and transmitted, and the information is received. 2 or the first information processing apparatus determines the next request transmission time according to the next request transmission time information at the time of overload, or the communication resource or the information processing resource is excessive by the first or second information processing apparatus. If it is determined that the load state is present, the next request transmission timing information at the time of overload is transmitted from the first or second information processing apparatus to the relay information processing apparatus, and the storage unit of the relay information processing apparatus The second or first information processing apparatus adds the next request transmission timing information at the time of overload to the response of the relay information processing apparatus in response to the request from the second or first information processing apparatus, and transmits it. The first information processing apparatus determines the next request transmission time in accordance with the next request transmission time information at the time of overload.   The information processing apparatus provided in the internal network communication system according to claim 1 or 2, wherein the communication resource or the information processing resource is overloaded by including the communication resource monitoring unit or the information processing resource monitoring unit. When it is determined that the state is in a state, the next request sending timing information at the time of overload to the information processing device that transmits and receives information to and from the information processing device to the relay information processing device, An information processing apparatus that transmits the information by the communication unit.   The relay information processing apparatus provided in the internal network communication system according to claim 1 or 2, wherein the communication resource monitoring unit or the information processing resource monitoring unit includes the communication resource monitoring unit or the information processing resource monitoring unit. If it is determined that the state is a load state, the next request transmission time information at the time of overload is added to the response to the information processing apparatus that has transmitted the request to the relay information processing apparatus, and is transmitted by the communication unit. A relay information processing apparatus characterized by the above.   3. The information processing apparatus provided in the inter-network communication system according to claim 1 or 2, wherein in a normal time, a request according to the next request transmission timing information is transmitted to the relay information processing apparatus. Or when a request is sent to the relay information processing apparatus at predetermined intervals, and the next request sending time information at the time of overload is added to the response from the relay information processing apparatus, the overload An information processing apparatus for determining the next request transmission time according to the next request transmission timing information.   A step of determining whether or not a load state of a communication resource or an information processing resource is an overload state in the information processing apparatus provided in the inter-network communication system according to claim 1 or 2, and A step of generating next request transmission timing information at the time of overload when it is determined that the load is in an overload state, and a step of transmitting the next request transmission timing information at the time of overload to the relay information processing apparatus; A communication control program characterized by the above.   A step of determining whether or not a load state of a communication resource or an information processing resource is an overload state in the relay information processing apparatus provided in the inter-network communication system according to claim 1 or 2, and according to the determination A step of generating next request sending timing information at the time of overloading when it is determined that an overload condition is detected; and a next request sending at the time of overload in response to the information processing device that has sent a request to the relay information processing device And a step of adding and sending time information.   A step of normally sending a request to the relay information processing device to the information processing device provided in the inter-network communication system according to claim 1 or 2 at a time according to the next request sending time information. Or, normally, sending a request to the relay information processing apparatus at predetermined intervals, and determining whether or not the next request sending time information at the time of overload is added to the response from the relay information processing apparatus; And a step of transmitting a next request according to the next request transmission timing information at the time of overload when the next request transmission timing information at the time of overload is added.   A communication control method in an internal network communication system having a plurality of internal networks including an information processing apparatus having a communication function, wherein the plurality of internal networks are connected to each other via a network, By arranging the relay information processing device on the network, between the first information processing device provided in the first internal network and the second information processing device provided in the second internal network Transmission / reception of information in the relay information processing apparatus is temporarily stored by sending information transmitted from the first or second information processing apparatus to the relay information processing apparatus, and the second or first information At the time of communication of a request and a response from the processing device to the relay information processing device, the first information stored in the relay information processing device Or by adding the information from the second information processing apparatus to the response and sending the information from the relay information processing apparatus so that the second or first information processing apparatus receives the information. The second or first information processing apparatus that receives and transmits information that determines the next request transmission timing is added to the response of the relay information processing apparatus in response to a request from one information processing apparatus. When the next request transmission time is determined according to the request transmission timing information and the relay information processing apparatus determines that the communication resource or the information processing resource is overloaded, the second or first information processing apparatus The second or second information is transmitted by adding information for determining the next request transmission timing at the time of overload to the response of the relay information processing apparatus to the request from The information processing apparatus determines the next request transmission time according to the next request transmission timing information at the time of overload, or the next time from the first or second information processing apparatus to the relay information processing apparatus Request transmission timing information is transmitted and stored in the storage unit of the relay information processing apparatus, and the next request transmission timing information is added to the response of the relay information processing apparatus in response to a request from the second or first information processing apparatus The second or first information processing apparatus that has received and received the transmission request determines the next request transmission time in accordance with the next request transmission timing information, and the first or second information processing apparatus uses the communication resource. Alternatively, when it is determined that the information processing resource is in an overload state, when the next request is sent from the first or second information processing apparatus to the relay information processing apparatus at the time of overload. Period information is transmitted and stored in the storage unit of the relay information processing apparatus, and the next request transmission time information at the time of overload is added to the response of the relay information processing apparatus to the request from the second or first information processing apparatus. In addition, the second or first information processing apparatus that has received and received the information sets the next request transmission time according to the next request transmission timing information at the time of overload, Communication control method.   A communication control method in an internal network communication system having a plurality of internal networks including an information processing apparatus having a communication function, wherein the plurality of internal networks are connected to each other via a network, By arranging the relay information processing device on the network, between the first information processing device provided in the first internal network and the second information processing device provided in the second internal network Transmission / reception of information in the relay information processing apparatus is temporarily stored by sending information transmitted from the first or second information processing apparatus to the relay information processing apparatus, and the second or first information At the time of communication of a request and a response from the processing device to the relay information processing device, the first information stored in the relay information processing device Or by adding the information from the second information processing apparatus to the response and sending the information from the relay information processing apparatus so that the second or first information processing apparatus receives the information. In transmission / reception of information between the information processing device and the second information processing device, during normal times, sending requests to the relay information processing device from the second or first information processing device is performed at predetermined intervals, If the relay information processing apparatus determines that communication resources or information processing resources are overloaded, the relay information processing apparatus responds to a request from the second or first information processing apparatus with an overload. The second or first information processing apparatus that has received and transmitted information for determining the next request transmission timing at the time of receiving the information Or when the communication resource or the information processing resource is determined to be overloaded by the first or second information processing device. The next information transmission time information in the event of an overload is sent from the information processing device to the relay information processing device and stored in the relay information processing device, and the relay information processing for the request from the second or first information processing device The second or first information processing device that has received and transmitted the overload next request transmission timing information in response to the device responds to the next request according to the overload next request transmission timing information. A communication control method between internal networks, characterized by determining a transmission time.   One or a plurality of customer internal networks having a managed device having a communication unit and a failure detection function and an administrator internal network having a management device are connected to each other via the network, and are on the network or inside the administrator A remote fault management system configured by arranging a relay information processing apparatus including a communication unit and a storage unit on a network-side unarmed segment, and information between the managed device and the management device Information transmitted from the management device or the managed device is temporarily stored in the storage unit of the relay information processing device by sending the information transmitted from the communication unit to the relay information processing device, and the managed device or When the management device communicates a request and response to the relay information processing device, the description of the relay information processing device The information from the management device or the managed device accumulated in the unit is added to the response and transmitted from the communication unit of the relay information processing device, so that the managed device or the management device receives the information. In the transmission / reception of information between the managed device and the management device, normally, the managed device sends a request to the relay information processing device for inquiring whether there is an instruction from the management device. When the managed device detects a failure, the information is transmitted in addition to a request to the relay information processing device when the managed device detects a failure, and at least the management device for the failure occurrence notification Until the first response is received from the relay information processing apparatus until the response is received or during a predetermined period. Remote Fault management system and performs a short second time interval than during the interval.   When the relay information processing apparatus determines that the communication resource or the information processing resource is overloaded, the next request transmission at the time of overload is made in response to the relay information processing apparatus response to the request from the managed apparatus The managed device that receives and transmits the information for determining the timing determines the next request transmission time according to the next request transmission timing information at the time of overload, or the management device uses the communication resource or information. When it is determined that the processing resource is in an overload state, the next request transmission time information at the time of overload is sent from the management device to the relay information processing device and accumulated in the storage unit of the relay information processing device, The managed device that has received the request, adds the next request transmission time information at the time of overload to the response of the relay information processing device in response to the request from the managed device. Remote fault management system according to claim 11, wherein determining the time of transmission of the next request in accordance with an overload during the next request sending time information, characterized in that.   When sending a failure occurrence notification from the managed device, the urgency information is added and transmitted, and when the relay information processing apparatus receives a request with the urgency information added, The next request transmission timing information is generated using the information, the next request transmission timing information is added to the response to the request and transmitted, and the managed device that has received the information transmits the next request transmission timing information next time according to the next request transmission timing information. Or when the management device receives the urgency information from the managed device via the relay information processing device, the next time using the urgency information. Generate request sending time information, send the next request sending time information to the relay information processing apparatus and store it in the storage unit of the relay information processing apparatus, and the relay information for the request from the managed device The next request transmission timing information is added to the response of the management device and transmitted, and the managed device that receives the response determines the next request transmission time according to the next request transmission timing information. The remote failure management system according to claim 11 or 12.   The management device determines that there is no request from the managed device in the time zone determined by the first time interval or the second time interval or in the time zone determined by the next request transmission timing information. In such a case, it is determined that an abnormality has occurred, a warning is displayed on a display device provided in the management device, or an error log is accumulated in a storage unit provided in the management device, or the first time interval or If the relay information processing device determines that there is no request from the managed device in the time zone determined by the second time interval or in the time zone determined by the next request transmission timing information, an error occurs. When there is a request from the management device, it is determined that an error has been detected in the response to the request. In the management apparatus that has been added and transmitted as information, and has received the information, a warning is displayed on a display device provided in the management apparatus, or an error log is accumulated in a storage unit provided in the management apparatus. The remote fault management system according to any one of claims 11 to 13.   15. The managed device provided in the remote fault management system according to any one of claims 11 to 14, wherein the relay information processing device for inquiring whether there is an instruction from the management device in a normal state When a failure is detected at a first time interval and a failure is detected, the fact that the failure has occurred is transmitted in addition to the request to the relay information processing device, and at least the management for the failure occurrence notification A managed device that transmits a request to the relay information processing device at a second time interval shorter than the first time interval until a response from the device is received or during a predetermined period. .   15. The managed device provided in the remote failure management system according to claim 12, wherein the next request transmission timing information is added to a response from the relay information processing device. In the case, the managed device is characterized in that the next request transmission time is determined according to the next request transmission timing information.   14. The managed device provided in the remote failure management system according to claim 13, wherein the managed device detects a failure by providing a failure urgency level table in which failure notification and urgency information are associated with each other. In this case, the urgency level information corresponding to the failure occurrence notification is acquired from the failure urgency level table, and the urgency level information is transmitted together with the failure occurrence notification to the management device via the relay information processing device. Or, when the managed device detects a failure, the fact that the failure has occurred is output to a display device included in the managed device, and the urgency information is input from the user for this Transmits the urgency information together with the failure occurrence notification to the management apparatus via the relay information processing apparatus.   15. The management apparatus provided in the remote fault management system according to claim 11, wherein the managed apparatus is normally connected to the managed apparatus via the relay information processing apparatus. The next request transmission timing information is transmitted so that the request transmission interval from the relay to the relay information processing device becomes the first time interval, and the failure occurs from the managed device via the relay information processing device If the information indicating that the request has been received is received, the request transmission interval from the managed device to the relay information processing device via the relay information processing device becomes the second time interval. In addition, the management device is characterized by transmitting next request transmission time information.   14. The management apparatus provided in the remote fault management system according to claim 13, wherein when the urgency information is received from the managed apparatus via the relay information processing apparatus, the urgency information is And assigning a communication time with priority to a managed device having a high degree of urgency, thereby generating next request transmission timing information for each managed device, and using the next request transmission timing information as the relay information processing A management apparatus that sends the information to each managed apparatus via the apparatus.   The relay information processing apparatus provided in the remote fault management system according to any one of claims 11 to 14, wherein the relay information processing from the managed apparatus to the managed apparatus is normally performed. When the next request transmission timing information is transmitted so that the request transmission interval for the apparatus becomes the first time interval, and when the information indicating that the failure has occurred is received from the managed apparatus, the managed apparatus The next information transmission timing information is transmitted so that a request transmission interval from the managed device to the relay information processing device becomes the second time interval.   14. The relay information processing apparatus provided in the remote failure management system according to claim 13, wherein when the request with the urgency information added is received from the managed device, the urgency information is used. Next, by assigning a communication time with priority to a managed device with a high degree of urgency, the next request transmission timing information of each managed device is generated, and the next request transmission timing information is requested from each managed device. A relay information processing apparatus characterized by being added to a response to the message and sending it.   15. The relay information processing apparatus provided in the remote fault management system according to claim 14, wherein the relay information processing apparatus is determined in a time zone determined by the first time interval or the second time interval or by the next request transmission timing information. If it is determined that there is no request from the managed device during the time zone, it is determined that an abnormality has occurred, and this is used as error information to associate the management history with identification information that uniquely defines the managed device. A relay information processing apparatus that stores the information in a table and transmits the response with the error information and identification information of the managed apparatus added to a response to the request from the management apparatus.   15. The management device provided in the remote fault management system according to claim 14, wherein when the error information is added to a response from the relay information device, a warning is displayed on a display device provided in the management device. Or storing it as an error log in a storage unit provided in the management device, or querying the relay information device for communication history information of the managed device, and determining the first time interval or the first from the communication history information. When it is determined that there is no request from the managed device in the time period determined by the time interval of 2 or the time period determined by the next request transmission timing information, it is determined that an abnormality has occurred, and the management A warning is displayed on a display device provided in the device, or an error log is accumulated in a storage unit provided in the management device. Management apparatus that.   A request to the relay information processing apparatus for inquiring of the managed apparatus provided in the remote fault management system according to any one of claims 11 to 14 whether or not there is an instruction from the management apparatus is transmitted. Usually, the step performed at the first time interval, the step of determining the detection of the failure, and if it is determined that the failure has been detected by the determination, the request to the relay information processing apparatus that the failure has occurred In addition to transmitting the request to the relay information processing apparatus from the first time interval until at least a response from the management apparatus to the failure notification is received or in a predetermined period And a step of executing at a short second time interval.   The request transmission interval from the managed device to the relay information processing device is normally set in the management device provided in the remote failure management system according to any one of claims 11 to 14. Next request generation time information is generated so as to be a time interval, and this is transmitted to the managed device via the relay information processing device, and from the managed device via the relay information processing device A step of determining whether or not information indicating that a failure has occurred has been received, and if there is, the request transmission interval from the managed device to the relay information processing device is the second time interval And generating the next request transmission timing information and transmitting the information to the managed device via the relay information processing apparatus. .   18. A step of determining a failure detection in the managed device according to claim 17, a step of acquiring urgency information associated with the failure occurrence notification when it is determined that a failure is detected by the determination, and the failure And a step of transmitting an occurrence notification and urgent level information in addition to a request to the relay information processing apparatus.   A step of determining whether or not the urgency information is added to a response from the relay information processing device to the management device according to claim 19, and when the urgency information is added, the urgency information The step of generating next request sending timing information corresponding to each managed device by preferentially assigning communication time to the managed device having a high degree of urgency using, and the next request sending timing information, And a step of sending to each of the managed devices via the relay information processing apparatus.   21. The relay information processing apparatus according to claim 20, wherein normal request transmission time information is generated so that a request transmission interval from the managed apparatus to the relay information processing apparatus is the first time interval in a normal state. To the managed device, to determine whether or not information indicating that a failure has occurred has been received from the managed device, and if there is, the from the managed device Generating the next request sending timing information so that the request sending interval for the relay information processing device becomes the second time interval, and sending the request sending timing information to the managed device. Control program.   The step of determining whether or not the urgency information is added to the request from the managed device to the relay information processing apparatus according to claim 21, and the urgency when the urgency information is added. The step of generating next request sending timing information corresponding to each managed device by assigning communication time with priority to the managed device having a high degree of urgency using information, and the next request sending timing information And a step of sending the response in addition to a response to the request from each managed device.   23. The relay information processing apparatus according to claim 22, wherein the request from the managed apparatus is in a time zone determined by the first time interval or the second time interval or in a time zone determined by the next request transmission timing information. And a communication history table in which it is determined that an abnormality has occurred and is associated with identification information that uniquely defines the managed device as error information. And a step of adding the error information and the identification information of the managed device to a response to the request from the management device, and transmitting the response to the request from the management device. A communication control program.   24. A step of inquiring the management device according to claim 23 about communication history information of the managed device to the relay information device, and a time zone determined by the first time interval or the second time interval from the communication history information. Or a step of determining whether or not there is a request from the managed device in a time period determined by the next request transmission timing information, and a step or error of displaying a warning on the display device when it is determined that there is no request And a step of causing the storage unit to store the log as a log.   One or a plurality of customer internal networks having a managed device having a failure detection function and an administrator internal network having a management device are connected to each other via the network, on the network or on the administrator internal network side. A communication control method in a remote failure management system configured by disposing a relay information processing device on a non-armed segment, wherein information is transmitted and received between the managed device and the management device. The information transmitted from the device or the managed device is temporarily stored in the relay information processing device by sending it to the relay information processing device, and the request from the managed device or the management device to the relay information processing device At the time of response communication, the management device or the piped device stored in the relay information processing device The information from the device is added to the response and transmitted from the relay information processing device to be received by the managed device or the management device, and between the managed device and the management device. During transmission / reception of information, normally, a request is sent from the managed device for inquiring whether there is an instruction from the management device to the relay information processing device at a first time interval, and the managed device fails. If detected, the fact that the failure has occurred is added to the request for the relay information processing device and transmitted, and at least until a response from the management device to the failure notification is received or predetermined During the period, a request is transmitted to the relay information processing apparatus at a second time interval shorter than the first time interval. Communication control method according to claim.   When the relay information processing apparatus determines that the communication resource or the information processing resource is overloaded, the next request transmission at the time of overload is made in response to the relay information processing apparatus response to the request from the managed apparatus The managed device that receives and transmits the information for determining the timing determines the next request transmission time according to the next request transmission timing information at the time of overload, or the management device uses the communication resource or information. When it is determined that the processing resource is in an overload state, the next request transmission time information at the time of overload is transmitted from the management apparatus to the relay information processing apparatus and stored in the relay information processing apparatus, and the managed information The response information of the relay information processing apparatus in response to a request from the apparatus is added with the next request transmission time information at the time of overload and transmitted, and the managed apparatus that has received the information Determining the time delivery of the next request in accordance with the next request sending time information, the communication control method according to claim 32, wherein a.   When sending a failure occurrence notification from the managed device, the urgency information is added and transmitted, and when the relay information processing apparatus receives a request with the urgency information added, The next request transmission timing information is generated using the information, the next request transmission timing information is added to the response to the request and transmitted, and the managed device that has received the information transmits the next request transmission timing information next time according to the next request transmission timing information. Or when the management device receives the urgency information from the managed device via the relay information processing device, the next time using the urgency information. The relay information processing apparatus generates request transmission time information, transmits the next request transmission time information to the relay information processing apparatus and stores the information in the relay information processing apparatus, and responds to a request from the managed apparatus. The next request transmission timing information is added to the response and transmitted, and the managed device that receives the response determines the next request transmission time according to the next request transmission timing information. The communication control method according to claim 33. The management device determines that there is no request from the managed device in the time zone determined by the first time interval or the second time interval or in the time zone determined by the next request transmission timing information. In such a case, it is determined that an abnormality has occurred, or in the time zone determined by the first time interval or the second time interval or in the time zone determined by the next request transmission timing information. When the relay information processing apparatus determines that there is no request from the management apparatus, it determines that an abnormality has occurred, and when there is a request from the management apparatus, the abnormality is detected in response to the request. 35 to 34, wherein the management apparatus is notified of the occurrence of an abnormality by adding the error information as error information and transmitting the information. The communication control method according to any one.

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