JP2009302623A - Network inspection system and network inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a network inspection system capable of inspecting a non-connected place in the network. <P>SOLUTION: When NO (the number of elements is ≥3 ) is determined in S201, it means that a relay device is present between a gateway device and a terminal device, so that processing is performed with respect to an address of the relay device one by one. First, 0 is set as a variable (j) for the number of relay devices (S205). It is then determined whether in the path information, an address in an element having the same number of relay devices as the variable (j) for the number relay devices is present in first network information (S207). When this is a NO (not present), it is determined whether the variable (j) for the number of relay devices is 0 (S209). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a network inspection system and a network inspection method.

  In recent years, with the increase in the number of personal computer users, the number of broadband lines has increased. In support centers such as device manufacturers, service providers, content providers, and communication carriers, the number and time of inquiries regarding various settings and problems are increasing dramatically. In the future, there is a concern that such inquiries will further increase with the spread of IP services using information appliances.

  In IP services using information appliances, WAN (Wide Area Network), gateway devices connecting WAN and HNW (Home Network), relay devices (switches, PLC (Power), etc. in LAN (Local Area Network) Line communication), wireless LAN, c.LINK (coaxial cable communication trademark), etc.) and terminal devices (information home appliances, sensors, cameras, etc.). It is difficult for a user to determine a failure location and to determine an inquiry destination based on the failure location. For this reason, it is assumed that terminal device manufacturers receive inquiries about defects not attributable to their products and services, and the operation at the support center is expected to further increase.

  At present, the support center cannot grasp all the service states (for example, throughput, packet loss, etc.) and terminal device states (CPU usage rate, etc.) of each user's home. This means that it is possible to grasp the status of the terminal device if it is a manufacturer, the status of the WAN if it is a telecommunications carrier, and the status of the service between the server and the terminal device if it is a service provider or content provider. Can not. As a result, it is not possible to specify the exact cause of the malfunction.

Prior art document information related to the invention of this application includes the following.
JP 2006-165789 A

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a network inspection system capable of inspecting an unconnected portion in a network.

  Another object of the present invention is to provide a network inspection system capable of inspecting a location where quality is lowered in a network.

  In the communication inspection from the gateway device to the terminal device, a method in which an ICMP echo request packet is transmitted and a response from the terminal device is received by the gateway device is widely used. Further, in a corporate relay device, a method (for example, SNMP) that performs a communication inspection by terminating a packet and returning a response packet to the received packet is widely spread.

  However, in order for a terminal device with few resources to receive a packet from the gateway device, it is necessary to always open the listening port. However, this is not safe in view of security, and the processing load on the terminal device is high. In a relay device for private demand, terminating a packet or snooping a packet and determining whether it is a packet addressed to itself has a high processing load.

  Therefore, in the present invention, such a method is not adopted, and thus an effect of reducing the processing load can be obtained.

  Specifically, in order to solve the above-described problem, the first invention is included in one or more terminal devices included in a tree-type network, one or more relay devices included in the network, and the network. A network inspection system including a gateway device and a network inspection device connected to the gateway device, wherein each terminal device includes a device information storage unit in which device information including an address of the terminal device is stored in advance, A device information transmission unit for transmitting device information read from the device information storage unit to the network, and each relay device has port information including a port type indicating a type of a port provided in the relay device. Port information storage unit that is stored for each port provided in the relay device, and a port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information And an address table generation unit that generates an address table including each port information read from the port information storage unit and the address of the relay device and transmits the address table to the network, and the gateway device includes an address of the gateway device. A device information storage unit in which device information including the device information is stored in advance, a device information transmission unit that transmits the device information read from the device information storage unit into the network, and a port corresponding to the network provided in the gateway device A port information storage unit that stores port information including a port type indicating the type of the device, a port information update unit that includes an address in the received device information in the port information corresponding to the port that received the device information, and An address table including the port information read from the port information storage unit and the address of the gateway device is generated. By using the address table generation unit, the received address table and the generated address table, for each of the terminal devices, the path information about the path from the gateway device to the terminal device, the address of the gateway device being And for each device other than the gateway device in the path, path information including an element including the number of relay devices between the device and the gateway device and the address of the device is generated, and the path information is included. A first network information generation unit that generates first network information that is network information, a first network information storage unit that stores the first network information, and newly generated first network information And second network information, which is network information when the network is operating correctly, based on the first network information read from the first network information storage unit. Network information generation unit, a second network information storage unit for storing the second network information, and the first network information from the first network information storage unit from the second network information storage unit. A network information transmission unit that reads out second network information and transmits the second network information to the network inspection device, and the network inspection device includes a first network information storage unit that stores the received first network information; A second network information storage unit for storing received second network information; an address of a terminal device that is one of the one or more terminal devices and is known not to be operating correctly; An inspection unit for inspecting an unconnected portion in the network by using the first network information read from one network information storage unit and the second network information read from the second network information storage unit. A network inspection system characterized by

  According to a second aspect of the present invention, one or more terminal devices included in a tree-type network, one or more relay devices included in the network, a gateway device included in the network, and a network inspection connected to the gateway device A path from the gateway device to the terminal device if the network is operating correctly and the terminal device receives data destined for the terminal device for each terminal device. Network inspection system using the quality when the quality values indicating the quality related to the reception of the data in each device are equal to each other, wherein each terminal device has device information including the address of the terminal device. A device information storage unit stored in advance, a device information transmission unit for transmitting device information read from the device information storage unit to the network, and data destined for the terminal device A quality information generation unit that generates quality information including quality values indicating reception quality and the address of the terminal device, and transmits the quality information to the network, and each relay device includes a port of the relay device. Port information including a port type indicating the type is stored for each port provided in the relay device, and the address in the received device information is included in the port information corresponding to the port that received the device information A port information updating unit for generating, an address table generating unit for generating an address table including each port information read from the port information storage unit and the address of the relay device, and sending it to the network; A quality value indicating the quality of reception of data destined for the terminal device in the relay device, the address of the terminal device, and the address of the relay device And a quality information generator for sending the quality information and the received quality information into the network, and the gateway device stores in advance device information including the address of the gateway device. A device information storage unit, a device information transmission unit for transmitting the device information read from the device information storage unit to the network, and a port type indicating the type of port corresponding to the network provided in the gateway device. A port information storage unit that stores port information to be included, a port information update unit that includes an address in the received device information in port information corresponding to the port that received the device information, and a read from the port information storage unit An address table generation unit that generates an address table including port information and an address of the gateway device; and a received address table. Table and the generated address table, for each terminal device, path information about the path from the gateway device to the terminal device, the element including the address of the gateway device, and the gateway device in the path A network information generation unit that generates path information including elements including the number of relay devices between the device and the gateway device and the address of the device, and generates network information including the path information A network information storage unit in which the network information is stored, a network information transmission unit that reads network information from the network information storage unit and transmits the network information to the network inspection device, and the terminal device for each terminal device as a destination Quality value indicating the quality of reception of data to be received by the gateway device, the address of the terminal device, and the address of the gateway device And a quality information generating unit that transmits the quality information and the received quality information to the network inspection device, and the network inspection device stores the received network information. A network information storage unit, a quality information storage unit for storing received quality information, an address of a terminal device that is one of the one or more terminal devices and is known not to be operating correctly, and the network A solution means having a network inspection system comprising: an inspection unit that inspects a location where quality is deteriorated in the network based on the network information read from the information storage unit and the quality information read from the quality information storage unit And

  According to a third aspect of the present invention, one or more terminal devices included in a tree-type network, one or more relay devices included in the network, a gateway device included in the network, and a network inspection connected to the gateway device If the network is operating correctly and the terminal device receives data destined for the terminal device, the quality related to reception of the data at the terminal device And the quality value indicating the quality related to the reception of the data in each device in the path from the gateway device to the terminal device and the quality value indicating the quality related to the transmission of the data are equal to each other. A network inspection system using quality, wherein each terminal device stores device information including an address of the terminal device in advance. A device information transmission unit for transmitting device information read from the device information storage unit to the network, a quality value indicating the quality related to reception of data destined for the terminal device, and the quality related to transmission of the data A quality information generating unit that generates quality information including a quality value and an address of the terminal device and transmits the quality information to the network, and each relay device has a port type indicating a type of a port provided in the relay device. A port information storage unit that stores the port information to be included for each port provided in the relay device, a port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information, and An address table generating unit that generates an address table including each port information read from the port information storage unit and the address of the relay device and sends the generated address table to the network , For each terminal device, a quality value indicating the quality related to reception of the data destined for the terminal device in the relay device, a quality value indicating the quality related to transmission of the data in the relay device, the address of the terminal device, and the A quality information generating unit that generates quality information including an address of the relay device, and sends the quality information and received quality information to the network, and the gateway device includes the address of the gateway device A device information storage unit that stores device information in advance, a device information transmission unit that transmits device information read from the device information storage unit into the network, and a type of port corresponding to the network provided in the gateway device Port information storage unit that stores port information including the port type indicating the device type, and the received device information address in the received device information A port information update unit included in port information corresponding to the port; an address table generation unit that generates an address table including the port information read from the port information storage unit and the address of the gateway device; and the received address table And, for each terminal device, path information about the path from the gateway device to the terminal device, and path information about the path from the gateway device to the terminal device. For each device other than the gateway device in the path and the element including the address of the gateway device, path information having an element including the number of relay devices between the device and the gateway device and the address of the device is generated. Network information generation that generates network information including each path information. A network information storage unit that stores the network information, a network information transmission unit that reads network information from the network information storage unit and transmits the network information to the network inspection device, and the terminal device for each terminal device. Generates quality information including the quality value indicating the quality related to reception of the destination data in the gateway device, the quality value indicating the quality related to transmission of the data in the gateway device, the address of the terminal device, and the address of the gateway device A quality information generating unit that transmits the quality information and the received quality information to the network inspection device, the network inspection device including a network information storage unit that stores the received network information, A quality information storage unit for storing the quality information, and an address of a terminal device that is one of the one or more terminal devices and is known not to be operating correctly. And a network inspection unit that inspects a location where quality is deteriorated in the network based on the network information read from the network information storage unit and the quality information read from the quality information storage unit. The system is the solution.

  According to the present invention, it is possible to inspect unconnected portions in the network. In addition, according to the present invention, it is possible to inspect a location where quality is degraded on the network.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a configuration diagram of a network inspection system according to the first embodiment.

  The network inspection system 1 according to the first embodiment includes one or more terminal devices A to D included in a tree-type network N, one or more relay devices S1, S2, W1, W2 included in the network N, a network N includes a gateway apparatus G included in N and a network inspection apparatus S connected to the gateway apparatus G. The network inspection device S is provided, for example, in a support center of a business operator who undertakes network inspection. The gateway device G and the network inspection device S are connected by a communication network NET (for example, the Internet). S such as the relay device S1 indicates a switch that is a network device. W of the relay device W1 or the like indicates “wireless”, and the relay devices W1 and W2 are connected by radio (for example, radio waves). The relay devices W1 and W2 are connected to other devices, and the devices other than the relay devices W1 and W2 are connected by wire (for example, a LAN cable). Reference numeral S21 and the like indicate ports provided in the apparatus.

  For example, a route from the gateway device G to the terminal device A is called a path. In this case, the path includes the gateway device G, the relay devices W1, W2, S1, and the terminal device A. Other routes are also called paths. Depending on the path, the devices included are different. In the network N, there are paths equal to the number of terminal devices, that is, four paths.

  The relay device is, for example, PLC (Power Line Communication), c. It may be a device related to LINK (a trademark of coaxial cable communication).

  FIG. 2 is a configuration diagram of each terminal apparatus according to the first embodiment.

  A terminal device (hereinafter denoted by reference numeral 2) is a personal computer used as a word processor or the like, an information device such as a printing device (printer), an image reading device (scanner), a television radio receiver, a recorder, or a cable. Broadcast receivers, information appliances such as washing machines and dishwashers, cameras (for example, surveillance cameras), sensors (for example, intruder sensors), switchboards, power meters, etc. An address (hereinafter referred to as an address) is assigned.

  The terminal device 2 includes a device information storage unit 21 in which device information including the address of the terminal device is stored in advance, and a device information transmission unit 22 that transmits the device information read from the device information storage unit 11 into the network N. Prepare. The device information may include a manufacturer name, type, brand name, model number, inquiry destination, and the like in addition to the address.

  FIG. 3 is a configuration diagram of each relay device according to the first embodiment.

  The relay device (hereinafter denoted by reference numeral 3) includes a port information storage unit 31 in which port information including a port type indicating the type of port provided in the relay device 3 is stored for each port provided in the relay device 3, and a reception The port information update unit 32 that includes the address in the device information in the port information corresponding to the port that received the device information, each port information read from the port information storage unit 31, and the address of the relay device And an address table generation unit 33 that generates an address table and sends it to the network N.

  For example, the port information corresponding to the port S22 of the relay device S2 illustrated in FIG. 1 includes information indicating “UTP category 5 cable (CAT5)” used for the port S22 in advance as a port type.

  For example, the port information corresponding to the port W1W of the relay apparatus W1 illustrated in FIG. 1 includes information indicating so-called WiFi communication performed at the port W1W in advance as a port type.

  In the relay device, similarly to the terminal device, a device information storage unit in which device information including the address is stored in advance, and device information that transmits the device information read from the device information storage unit into the network N And a transmission unit.

  FIG. 4 is a configuration diagram of the gateway device according to the first embodiment.

  The device information storage unit 41 in which device information including the address of the gateway device G is stored in advance, the device information transmission unit 42 that transmits the device information read from the device information storage unit 41 into the network N, and the gateway device G are provided. A port information storage unit 43 that stores port information including a port type indicating the type of port corresponding to the network N, and an address in the received device information is included in the port information corresponding to the port that has received the device information. Port information updating unit 44, an address table generating unit 45 that generates an address table including the port information read from the port information storage unit 43 and the address of the gateway device G, and the received address table and the generated address According to the table, for each terminal device, the path from the gateway device G to the terminal device Path having an element including the address of the gateway device G and an element including the number of relay devices between the devices and the gateway device for each device other than the gateway device G in the path. A first network information generating unit 46 that generates information and generates first network information that is network information including the path information, and a first network information storage unit that stores the first network information. 47 and the newly generated first network information and the first network information read from the first network information storage unit 47 are the second network information when the network N is operating correctly. The second network information generating unit 48 for generating network information, the second network information storing unit 49 for storing the second network information, and the first network information from the first network information storing unit 47 The second network information is read from the second network information storage unit 49 to check the network. Network information transmission unit 410 for transmitting to device S, device information storage unit 411 for storing received device information, and device information transmission for transmitting device information read from device information storage unit 411 to network inspection device S Part 412.

  The first network information is when the network is not operating correctly (for example, when there is a relay device that is not turned on, a terminal device that cannot be turned on due to a failure, cable disconnection, or wireless communication failure due to external noise, etc. However, the network information faithfully indicates such a network. On the other hand, the second network information is network information indicating that there is no event as illustrated, that is, network information when the network is operating correctly. Specifically, the second network information is network information when each device in the network is correctly connected.

  FIG. 5 is a configuration diagram of the network inspection apparatus according to the first embodiment.

  The network inspection device S includes a first network information storage unit 51 that stores the received first network information, a second network information storage unit 52 that stores the received second network information, The address of a terminal device that is one of the one or more terminal devices and is known not to operate correctly, the first network information and the second network information storage read from the first network information storage unit 51 An inspection unit 53 that inspects an unconnected portion in the network N based on the second network information read from the unit 52, a display unit 54 that displays a result of the inspection, and a database 55 that stores the address of the gateway device G And a device information storage unit 56 for storing the received device information, and an input unit 57 such as a keyboard.

  The database 55 stores user information including the address of the gateway device G. The user information includes, for example, a user ID indicating a user who uses a house provided with the network N, a telephone number of the user's house, a manufacturer name of the gateway device G, a model number, an inquiry address of the manufacturer, and a time when the user information is updated. Is included.

  The device information storage unit 56 stores device information including a terminal device address, manufacturer name, type, brand name, model number, and inquiry destination. In addition, when the device information of the relay device is transmitted, the device information may include information unique to the relay device.

  In the embodiment of the present invention, a mode for the network N in FIG. 1 will be described. For example, a mode for a network provided in another user's house is the same. Therefore, a user ID is associated with each piece of information as necessary, and information associated with a user ID indicating a user at a user's home provided with a network to be inspected is used. Accordingly, an operation such as searching for information from the user ID is performed. However, such an operation is redundant and will be omitted, and an example in the network N shown in FIG. 1 will be described.

  Next, a network inspection method by the network inspection system 1 according to the first embodiment will be described.

(1) Transmission of Device Information In the terminal device 2 shown in FIG. 2, the device information transmission unit 22 reads device information from the device information storage unit 21 and sends it out into the network N. The device information may be received by each relay device 3 and the gateway device G, and the method may be appropriately selected from broadcast, multicast, unicast, and the like. Further, the transmission of the device information does not have to be stopped permanently, for example, it may be performed at regular intervals. In addition, the device information may be included in information transmitted for other purposes.

  In the gateway device G shown in FIG. 4, the device information transmission unit 42 reads out device information from the device information storage unit 41 and sends it out into the network N. The device information may be received by each relay device 3, and the method may be appropriately selected from broadcast, multicast, unicast, and the like. Further, the transmission of the device information does not have to be stopped permanently, for example, it may be performed at regular intervals. In addition, the device information may be included in information transmitted for other purposes.

(2) Update of Port Information In the relay device 3 shown in FIG. 3, the port information update unit 32 includes the address in the received device information in the port information corresponding to the port that received the device information.

  For example, the address in the device information transmitted from the terminal device C shown in FIG. 1 and received at the port S22 of the relay device S1 is included in the port information corresponding to the port S22. The port type indicating the standard of the connector used for the port S22 and the address of the terminal device C are included.

  The device information is transmitted from the port S21 of the relay device S1 and received by the port S14 of the relay device S2, and the address in the received device information is included in the port information corresponding to the port S14. The port information includes the port type indicating “category 5 (CAT5)” and the address of the terminal device C.

  Similarly, the port information corresponding to the port W2C of the relay device W2 includes the port type indicating the standard of the connector used for the port and the address of the terminal device C.

  In addition, the port information corresponding to the port W1W of the relay device W1 includes the port type indicating WiFi communication and the address of the terminal device C.

  In the gateway device G shown in FIG. 4, the port information update unit 44 includes the address in the received device information in the port information corresponding to the port that has received the device information.

  The device information transmitted from the terminal device C shown in FIG. 1 is received by the port GC of the gateway device G, and the port information corresponding to the port includes the port type indicating “category 5 (CAT5)” and the terminal device. C address is included.

  By updating the port information, the port information as shown in FIG. 6 is stored in each port information storage unit. In the figure, “A” indicates the address of the terminal device A. The same applies to B to D. “WiFi” indicates a port type indicating WiFi communication. “CAT5” indicates a port type indicating “Category 5 (CAT5)”. Although not shown, an identifier indicating the corresponding port is associated with the port information, and the correspondence between the port and the port information can be understood from the identifier.

  In the gateway device G, the received device information is stored in the device information storage unit 41 in association with the received time.

(3) Generation and Transmission of Address Table In the relay apparatus 3 shown in FIG. 3, the address table generation unit 33 reads each port information from the port information storage unit 31, and relays the port information and the port information stored in advance. An address table including the address of the device 3 is generated and transmitted to the network N. The address table may be received by the gateway apparatus G, and the method may be appropriately selected from broadcast, multicast, unicast, and the like. The transmission of the address table need not be stopped forever, and may be performed at regular intervals, for example. Further, the address table may be included in information transmitted for other purposes.

  In the gateway device G illustrated in FIG. 4, the address table generation unit 45 reads port information from the port information storage unit 43 and generates an address table including the port information and the address of the gateway device G.

(4) Generation and Storage of First Network Information In the gateway device G shown in FIG. 4, the first network information generation unit 46 uses the received address table and the generated address table for each terminal device. The number of relay devices between the device and the gateway device for the path information from the gateway device G to the terminal device, including the element including the address of the gateway device G and each device other than the gateway device G in the path And path information having an element including the address of the apparatus is generated, first network information that is network information including the path information is generated, and is stored in the first network information storage unit 47.

  7 and 8 are flowcharts showing a path information generation method.

  Here, a method for generating path information for a path from the gateway device G to the terminal device D will be described, but a method for generating path information for a path from the gateway device G to another terminal device is also the same.

  First, path information having an element including the address of the gateway device is generated (S1). Next, 0 is set to the relay device number variable i which is a variable for the number of relay devices, the port information including the address of the terminal device D is searched from the generated address table, and the port in the searched port information is searched. A seed (referred to as port seed P1) is read (S3).

  Next, one or more address tables (referred to as address table T1) including port information including the address of the gateway device G and the port type P1 are selected from the received address tables (S5).

  Next, the port information including the address of the terminal device D is searched from each address table T1, and the number of addresses in the searched port information (referred to as the number of addresses N1) is obtained (S7).

  Next, port information including the address of the terminal device D is searched from the generated address table, and the number of addresses in the searched port information (referred to as the number of addresses N2) is obtained (S9).

  Next, an address table T1 (referred to as an address table T3) corresponding to each of one or more address numbers N1 that is equal to or less than the number of addresses N2 is selected (S11).

  Next, it is determined whether or not the number of the address table T3 is 1 (S13).

  If the number of the address table T3 is not 1, the port information including the address of the terminal device D is searched from each address table T3, and the number of addresses in the searched port information (referred to as the number of addresses N3) is obtained. The address table T3 (T4) corresponding to N3 is selected, the address of the relay device 3 is read from the selected address table, 1 is added to the relay device number variable i, and the read address of the relay device 3 and the relay device number variable are read. An element including the number of relay devices equal to i is included in the path information (S15).

  Next, port information including the address of the terminal device D is searched from the address table T4, and the port type (referred to as P2) in the searched port information is read (S17).

  Next, port information other than the port information including the address of the terminal device D is searched from the address table T4, and all addresses (referred to as address AD1) in the searched port information are read (S19).

  Next, from one of the received address table and the generated address table, one or more address tables that do not include the relay device address equal to the relay device address in the element already included in the path information are searched. Then, an address table (referred to as address table T5) including port information including the address AD1 and the port type P2 is selected from each searched address table (S21).

  Next, port information including the address of the terminal device D is searched from the address table T4, and the number of addresses in the searched port information (referred to as the number of addresses N4) is obtained (S23).

  Next, port information including the address of the terminal device D is searched from the address table T5, and the number of addresses in the searched port information (referred to as the number of addresses N5) is obtained (S25).

  Next, an address table T5 (referred to as an address table T6) corresponding to each of one or more address numbers N5 that is equal to or less than the address number N4 is selected (S27).

  Next, it is determined whether or not the number of the address table T6 is 1 (S29).

  If the number of the address table T6 is not 1, the address table T6 is set as the address table T3, and the process returns to step S15.

  If the number of the address table T6 is 1, port information including the address of the terminal device D is searched from the address table T6 (S31).

  Next, it is determined whether or not the number of addresses in the retrieved port information is 1 or less (S33).

  If the number of addresses is greater than 1, the address table T6 is set as the address table T3, and the process returns to step S15.

  If the number of addresses is 1 or less, the address of the relay device 3 is read from the address table T6, 1 is added to the relay device number variable i, and the read address of the relay device 3 and the number of relay devices equal to the relay device number variable i are obtained. The included element is included in the path information (S35).

  If the number of address tables T3 is 1 in step S13, it is determined whether the number of address tables T1 is 1 or less (S37).

  If the number of the address table T1 is greater than 1, the process returns to step S15.

  If the number of the address table T1 is 1 or less, the address of the relay device is read from the address table T1, 1 is added to the relay device number variable i, and the number of relay devices equal to the read address of the relay device 3 and the relay device number variable i. Are included in the path information (S39).

  Subsequent to steps S35 and S39, 1 is added to the relay device number variable i, and an element including the read address of the relay device 3 and the number of relay devices equal to the relay device number variable i is included in the path information (S41). , The process ends.

(Concrete example)
Here, a method of generating path information for the terminal device D when the port information as shown in FIG. 6 is stored in each port information storage unit will be specifically described.

  First, path information having an element including the address of the gateway device is generated (S1). Next, 0 is set to the relay device number variable i, and the port type P1 “CAT5” in the port information shown in FIG. 6E is read (S3).

  Next, port information including the port types “CAT5” and “G” illustrated in FIG. 6A, port information including the port types “CAT5” and “G” illustrated in FIG. Port information including the port types “CAT5”, “A”, “B”, and “G” shown in FIG. 6D is selected (S5).

  Next, the address number N1 “4” in the port information including “D” illustrated in FIG. 6A and the address number N1 “2” in the port information including “D” illustrated in FIG. Then, the number of addresses N1 “1” in the port information including “D” shown in FIG. 6D is obtained (S7).

  Next, the number of addresses N2 “4” in the port information shown in FIG. 6D is obtained (S9).

  Next, the address table T3 including the port information of FIG. 6A, the address table T3 including the port information of FIG. 6C, and the address table T3 including the port information of FIG. 6D are selected (S11). .

  Next, it is determined that the number of address tables T3 is not 1 (S13).

  Next, the address numbers N3 “4”, “2”, “1” are obtained, and the address table T4 (address table corresponding to FIG. 6A) corresponding to the address number N3 “4” is selected and selected. The address of the relay device 3 (relay device W1) is read from the address table, and an element including the address and the number of relay devices “1” is included in the path information (S15).

  Next, the port type P2 “WiFi” in the port information including “D” in the address table T4 corresponding to FIG. 6A is read (S17).

  Next, the address AD1 “G” in the address table T4 corresponding to FIG. 6A is read (S19).

  Next, the address table corresponding to FIGS. 6B, 6C, and 6D is searched from the address table corresponding to FIGS. 6B, 6C, 6D, and 6E, and From each address table, an address table T5 (address table corresponding to FIG. 6B) including port information including the address AD1 “G” and the port type P2 “WiFi” is selected (S21).

  Next, the number of addresses N4 “4” in the path information including “D” in the address table T4 corresponding to FIG. 6A is obtained (S23).

  Next, the number of addresses N5 “4” in the path information including “D” in the address table T5 corresponding to FIG. 6B is obtained (S25).

  Next, the address table T6 corresponding to FIG. 6B is selected (S27).

  Next, it is determined that the number of the address table T6 is 1 (S29).

  Next, port information including “D” is searched from the address table T6 corresponding to FIG. 6B (S31).

  Next, it is determined that the number of addresses in the port information is not 1 or less (S33).

  Next, the address table corresponding to FIG. 6B is set to T3, thereby obtaining the address number N3 “4”, and corresponding to the address table T4 corresponding to the address number N3 “4” (corresponding to FIG. 6B). The address of the relay device 3 (relay device W2) is read from the selected address table, and an element including the address and the number of relay devices “1” is included in the path information (S15).

  Next, the port type P2 “CAT5” in the port information including “D” in the address table T4 corresponding to FIG. 6B is read (S17).

  Next, the address AD1 “G” in the address table T4 corresponding to FIG. 6B is read (S19).

  Next, an address table corresponding to FIGS. 6C and 6D is searched, and from each of the address tables, an address table T5 (including port information including an address AD1 “G” and a port type P2 “CAT5”) is obtained. The address table corresponding to FIGS. 6C and 6D is selected (S21).

  Next, the number of addresses N4 “4” in the path information including “D” in the address table T4 corresponding to FIG. 6B is obtained (S23).

  Next, the address numbers N5 “2” and “1” in the path information including “D” in the address table T5 corresponding to FIGS. 6C and 6D are obtained (S25).

  Next, the address table T6 corresponding to FIGS. 6C and 6D is selected (S27).

  Next, it is determined that the number of the address table T6 is not 1 (S29).

  Next, the address table corresponding to FIG. 6C is set to T3, thereby obtaining the address numbers N3 “2” and “1”, and the address table T4 corresponding to the address number N3 “2” (FIG. 6 ( (address table corresponding to c) is selected, the address of the relay device 3 (relay device S1) is read from the selected address table, and an element including the address and the number of relay devices “1” is included in the path information ( S15).

  Next, the port type P2 “CAT5” in the port information including “D” in the address table T4 corresponding to FIG. 6C is read (S17).

  Next, the addresses AD1 “G”, “A”, and “B” in the address table T4 corresponding to FIG. 6C are read (S19).

  Next, an address table corresponding to FIG. 6D is searched, and port information including addresses AD1 “G”, “A”, “B” and port type P2 “CAT5” is included from each address table. The address table T5 (the address table corresponding to FIG. 6D) is selected (S21).

  Next, the number of addresses N4 “2” in the path information including “D” in the address table T4 corresponding to FIG. 6C is obtained (S23).

  Next, the number of addresses N5 “1” in the path information including “D” in the address table T5 corresponding to FIG. 6D is obtained (S25).

  Next, the address table T6 corresponding to FIG. 6D is selected (S27).

  Next, it is determined that the number of the address table T6 is 1 (S29).

  Next, port information including “D” is searched from the address table T6 corresponding to FIG. 6D (S31).

  Next, it is determined that the number of addresses in the port information is 1 or less (S33).

  Next, the address of the relay device 3 (relay device W2) is read from the address table T6 corresponding to FIG. 6D, the relay device number variable i is set to 1, and the element includes the address and the number of relay devices “1”. Is included in the path information (S35), and the process ends.

  In the configuration of the network N shown in FIG. 1, YES is determined in step S <b> 13 and then YES is not determined in step S <b> 37, but for example, a relay device between the gateway device G and the terminal device. In a network in which only one exists, it may be determined in this way.

  Further, in the configuration of the network N shown in FIG. 1, YES is determined in step S <b> 13, and then NO is not determined in step S <b> 37, but the gateway device G is connected to the relay device via the same relay device. In a network to which a terminal device is connected, it may be determined in this way when generating path information for the terminal device.

(5) Generation and Storage of Second Network Information In the gateway device G shown in FIG. 4, the second network information generation unit 48 includes the newly generated first network information and the first network information storage unit. Based on the first network information read from 47, second network information that is network information when the network N is operating correctly is generated and stored in the second network information storage unit 49.

  FIG. 9 is a flowchart illustrating a second network information generation method.

  It is determined whether or not there is second network information in the second network information storage unit 49 (S101). When it is determined NO, the first network information is read from the first network information storage unit 47 and stored in the second network information storage unit 49 as the second network information (S103), and the process ends.

  On the other hand, if it is determined as YES, whether or not the address existing in the first network information of the first network information storage unit 47 exists in the second network information of the second network information storage unit 49 is checked. Determination is made (S105).

  If it is determined as YES (does not exist), the element including the address is included in the second network information, and the permutation of the number of relay devices in the second network information is the relay in the first network information. The second network information is updated so as to be consistent with the permutation of the number of devices (S107).

  If it is determined NO in step S105, or if step S107 is completed, the address existing in the second network information in the second network information storage unit 49 is the first address in the first network information storage unit 47. Is not present in the network information (S113).

  If it is determined YES, the current time is associated with the address (S115). The second network information generation unit 48 continuously monitors the associated time, and if the difference between the time and the current time is greater than or equal to a predetermined size (if it becomes old) 2) so that the element including the address is deleted from the second network information and the permutation of the number of relay devices in the second network information matches the permutation of the number of relay devices in the first network information. Update network information.

  If NO is determined in step S113, and if step S115 is completed, both the second network information in the second network information storage unit 49 and the first network information in the first network information storage unit 47 are included. It is determined whether or not the numbers of relay apparatuses in the elements that exist but are included in different path information or included in the same path information but include the address are different (S117).

  When it is determined YES, the second network information is updated so that the permutation of the number of relay devices in the second network information matches the permutation of the number of relay devices in the first network information (S119).

  When it is determined NO, when step S119 ends, the process ends.

(6) Transmission of network information In the gateway device G, the network information transmission unit 410 receives the first network from the first network information storage unit 47 when there is a request from the network inspection device S or when there is no request. The second network information is read from the second network information storage unit 49 and transmitted to the network inspection device S. The network inspection device S receives each of them and stores them in the first network information storage unit 51 and the second network information storage unit 52.

  In the gateway device G, the received device information is stored in the device information storage unit 411. In the gateway device G, the device information transmission unit 412 reads the device information from the device information storage unit 411 and transmits it to the network inspection device S when there is a request from the network inspection device S or when there is no request. . The network inspection device S receives the device information and stores it in the device information storage unit 56.

(7) Inspection of unconnected locations in network N (connection inspection)
For example, the operator of the network inspection device S is notified from a user in the home where the network N is configured, for example, that the video display device, which is the terminal device D, is not operating correctly by telephone or the like. The network inspection device S determines whether or not the gateway device G can be connected, and displays the determination result on the display unit 54. If it is displayed that connection is not possible, the operator checks whether there is a similar notification from another user. If there is no similar notification, the operator determines that the gateway device G is out of order and receives the same notification. For example, it is determined that the server that transmits data to the terminal device D or a similar video display device has failed.

  On the other hand, if connection to the gateway device G is possible, a connection inspection in the network N is performed.

  First, the operator inputs, for example, the model name of the terminal device D from the input unit 57 of the network inspection device S, and the inspection unit 53 reads an address in the device information including the model name (hereinafter referred to as a terminal device address). .

  Next, the inspection unit 53 determines whether or not the terminal device address exists in the first network information, and when it is determined NO, the inspection of the unconnected portion in the network N (referred to as connection inspection). I do.

  FIG. 10 is a flowchart showing a connection inspection method according to the first embodiment.

  First, it is determined whether or not the number of elements of path information including the terminal device address in the second network information (hereinafter simply referred to as path information) is 2 (S201).

If it is determined as YES (the number of elements is 2), there is no relay device between the gateway device and the terminal device.
. Disconnection between the device having the address in the two elements in the path information, that is, the gateway device and the terminal device. Two determination results are displayed such that the terminal device is out of order (S203), and the process ends. The plurality of determination results indicate that there is any possibility. The gateway device and the terminal device are displayed in such a manner that the operator can understand by notifying the user such as “device name” and “model name”.

  If it is determined NO (the number of elements is 3 or more), there is a relay device between the gateway device and the terminal device, and therefore processing is performed one by one for the address of the relay device. The address of the relay device is an address other than the terminal device address in the path information.

  First, 0 is set to the relay device number variable j, which is a variable for the number of relay devices (S205).

  Next, it is determined whether or not an address in an element having the number of relay devices equal to the relay device number variable j in the path information exists in the first network information (S207).

  If NO (does not exist), it is determined whether or not the relay device number variable j is 0 (S209).

If NO (relay device number variable j is 1 or more),
. A relay device having an address in an element including the relay device number variable j in the path information, and a relay device having an address in the element including the number of relay devices obtained by subtracting 1 from the relay device number variable j in the path information. Disconnection between. Two determination results are displayed such that the relay device having the address in the element including the relay device number variable j in the path information is out of order (S211), and the process ends. Note that the relay device is displayed in such a manner that the operator can understand by notifying the user such as “device name” and “model name”. The same applies to the following description.

If it is determined NO (relay device number variable j is 0),
. Disconnection between gateway device and relay device having address in element including relay device number variable j in path information. Two determination results are displayed such that the relay device having the address in the element including the relay device number variable j in the path information is out of order (S213).

  When it is determined YES in step S207 (the address in the element having the number of relay devices equal to the relay device number variable j in the path information exists in the first network information), 1 is added to the relay device number variable j. (S221) It is determined whether or not the relay device number variable j is equal to the number of relay devices in the element including the terminal device address in the path information (S223).

If it is determined to be YES (equal), that is, if processing is completed for all relay devices,
. Terminal device is faulty. Disconnection between terminal device and relay device. Disconnection between relay device. Disconnection between relay device and gateway device. Five determination results are displayed such that the port to the terminal device of the relay device closest to the terminal device is faulty (S225), and the process ends.

  On the other hand, if it is determined NO (not equal), that is, if the processing has not been completed for all the relay devices, the process returns to step S207.

  The operator notifies the user of the displayed contents, thereby repairing, for example, the terminal device, the relay device, the gateway device, the cable, the port, and the like, so that the network N operates correctly.

  As described above, according to the first embodiment, one or more terminal devices 2 included in a tree-type network, one or more relay devices 3 included in the network, a gateway device G included in the network, and In the network inspection system including the network inspection device S connected to the gateway device G, each terminal device 2 includes a device information storage unit 21 in which device information including the address of the terminal device 2 is stored in advance, and the device And a device information transmission unit 22 for transmitting the device information read from the information storage unit 21 into the network. Each relay device 3 has port information including a port type indicating the type of port provided in the relay device 3 A port information storage unit 31 that is stored for each port provided in the relay device 3 and a port information update unit 32 that includes the address in the received device information in the port information corresponding to the port that received the device information. The gateway device G includes an address table generation unit 33 that generates an address table including each port information read from the port information storage unit and the address of the relay device 3 and sends it to the network. Device information storage unit 41 in which device information including the address of the device is stored in advance, a device information transmission unit 42 that transmits the device information read from the device information storage unit 41 into the network, and a network provided in the gateway device G Port information storage unit 43 that stores port information including the port type indicating the type of port corresponding to the port information, and port information that includes the address in the received device information in the port information corresponding to the port that received the device information An address including the update unit 44, the port information read from the port information storage unit 43, and the address of the gateway device G. The path information on the path from the gateway device G to the terminal device 2 for each terminal device 2 by the address table generation unit 45 that generates the table, the received address table, and the generated address table. Path information including an element including the address of the gateway device G and an element including the number of relay devices between the device and the gateway device G and the address of the device for each device other than the gateway device G in the path And a first network information storage unit 47 for generating first network information that is network information including the path information, and a first network information storage unit 47 for storing the first network information. And the network information when the network is operating correctly by the newly generated first network information and the first network information read from the first network information storage unit. From the second network information generation unit 48 that generates certain second network information, the second network information storage unit 49 that stores the second network information, and the first network information storage unit 47 to the first Network information transmitting section 410 that reads the second network information from second network information storage section 49 and transmits the second network information to network inspection apparatus S. Network inspection apparatus S receives the received first network information. A first network information storage unit 51 in which information is stored; a second network information storage unit 52 in which received second network information is stored; In the network, the address of the terminal device 2 that is known not to operate, the first network information read from the first network information storage unit, and the second network information read from the second network information storage unit. And an inspection unit 53 for inspecting an unconnected portion.

  The inspection is a first step (S201) for determining whether or not the number of elements in the path information having an element including the address of the terminal device 2 that is known not to operate correctly with the second network information is two. ), And when the number of elements is not 2, the second step (S205) of setting 0 to the relay device number variable, which is a variable for the number of relay devices, and the relay device equal to the relay device number variable in the path information A third step (S207) for determining whether or not an address in an element having a number exists in the first network information, and if it is determined that the address does not exist in the third step, the relay device number variable is When it is determined in the fourth step (S209) for determining whether or not 0 and in the third step, 1 is added to the relay device number variable, and the relay device number variable is Terminal And the fifth step (S221, S223) for determining whether or not the number is equal to the number of relay devices in the element including the address of device 2, and if it is determined that the fifth step is not equal, It is characterized by returning.

  Therefore, it is possible to inspect unconnected portions in the network.

  Further, since the terminal device and the relay device themselves transmit device information, it is not necessary to always open the listening port, the processing load can be reduced, and it is safe in view of security.

[Second Embodiment]
Since the configuration of the network inspection system according to the second embodiment is the same as that of the first embodiment, illustration and description thereof are omitted. The same or similar components as those in the first embodiment are denoted by the same reference numerals, and the description will be omitted or simplified, or differences will be mainly described.

  In the second embodiment, if the network N is operating correctly and, for each terminal device, the terminal device receives data destined for the terminal device, the path from the gateway device to the terminal device The quality inspection is performed using the quality in the case where the quality values indicating the quality related to the reception of the data in each device are equal to each other.

  The quality value is, for example, throughput, and when the data is a packet that is sequentially transmitted and received, the throughput is the number of packets received per unit time. In this case, the quality value may be an average or variance of packet reception intervals. The quality value may be a ratio of the number of packets not stored in the reception buffer to the number of packets received per unit time, that is, a packet loss rate. Further, the quality value may be a combination of these quality values.

  FIG. 11 is a configuration diagram of each terminal apparatus according to the second embodiment.

  The terminal device 2 includes a device information storage unit 21, a device information transmission unit 22, and a quality information generation unit 23. The quality information generation unit 23 generates quality information including a quality value indicating quality related to reception of data destined for the terminal device 2 and the address of the terminal device 2 and transmits the quality information to the network N.

  FIG. 12 is a configuration diagram of each relay device according to the second embodiment.

  A port information storage unit 31, a port information update unit 32, an address table generation unit 33, and a quality information generation unit 34 are provided. The quality information generation unit 34 generates, for each terminal device, quality information including a quality value indicating quality related to reception in the relay device of data destined for the terminal device, an address of the terminal device, and an address of the relay device, The information and the received quality information are transmitted into the network N.

  FIG. 13 is a configuration diagram of the gateway device according to the second embodiment.

  The gateway device G includes a device information storage unit 41, a device information transmission unit 42, a port information storage unit 43, a port information update unit 44, an address table generation unit 45, a first network information generation unit 46, A first network information storage unit 47, a second network information generation unit 48, a second network information storage unit 49, a network information transmission unit 410, a device information storage unit 411, and a device information transmission unit 412; The quality information generation unit 413 and the quality information storage unit 414 are provided. The quality information generation unit 413 generates, for each terminal device, quality information including a quality value indicating the quality related to reception of data destined for the terminal device in the gateway device, the address of the terminal device, and the address of the gateway device. The information and the received quality information are transmitted to the network inspection device S. The quality information storage unit 414 stores the generated quality information and the received quality information.

  FIG. 14 is a configuration diagram of a network inspection apparatus according to the second embodiment.

  The network inspection device S includes a first network information storage unit 51, a second network information storage unit 52, an inspection unit 53, a display unit 54, a database 55, a device information storage unit 56, and an input unit 57. And a quality information storage unit 58 for storing quality information transmitted from the gateway device G. In the second embodiment, the inspection unit 53 can also inspect a portion of the network where quality is degraded.

  Next, a network inspection method by the network inspection system 1 according to the second embodiment will be described.

(1) Transmission of device information (2) Update of port information (3) Generation and transmission of address table (4) Generation and storage of first network information (5) Generation and storage of second network information (6) Transmission of network information Reception of device information in the gateway device and transmission of the device information to the network inspection device are the same as those in the first embodiment.

(7) Transmission of Quality Information In the terminal device 2 shown in FIG. 11, the quality information generation unit 23 includes a quality value indicating quality related to reception of data destined for the terminal device 2 and the address of the terminal device 2. Information is generated and sent into the network N. The quality information may be received by each relay device 3 and the gateway device G, and the method may be appropriately selected from broadcast, multicast, unicast, and the like. Further, the transmission of the quality information does not have to be stopped forever, and may be performed at regular intervals, for example. Further, the quality information may be included in information transmitted for other purposes.

  In the relay device 3 shown in FIG. 12, the quality information generation unit 34 for each terminal device has a quality value indicating the quality related to reception of data destined for the terminal device in the relay device, the address of the terminal device, and the address of the relay device. And the quality information and the received quality information are transmitted into the network N. The quality information may be received by the gateway apparatus G, and the method may be appropriately selected from broadcast, multicast, unicast, and the like. Further, the transmission of the quality information does not have to be stopped forever, and may be performed at regular intervals, for example. Further, the quality information may be included in information transmitted for other purposes.

  In the gateway device G shown in FIG. 13, the quality information generation unit 413, for each terminal device, the quality value indicating the quality related to reception of data destined for the terminal device in the gateway device, the address of the terminal device, and the address of the gateway device Is generated and stored in the quality information storage unit 414. The quality information generation unit 413 reads the quality information from the quality information storage unit 414 and transmits it to the network inspection device S when there is a request from the network inspection device S or when there is no request.

  In the network inspection apparatus S shown in FIG. 14, the quality information is received and stored in the quality information storage unit 58.

(8) Inspection of quality deterioration in network N (quality inspection)
As in the first embodiment, the inspection unit 53 determines whether or not the terminal device address exists in the first network information, and if it is determined as NO, the unconnected portion in the network N On the other hand, if it is determined YES, a portion where the quality is deteriorated in the network N is inspected (referred to as quality inspection).

  15 and 16 are flowcharts showing a quality inspection method according to the second embodiment.

  First, the difference between the quality value in the quality information including the address of the gateway device and the terminal device address and the quality value in the quality information including the terminal device address is determined based on a predetermined value (hereinafter referred to as “predetermined”). It is determined whether it is larger (S303).

  When it is determined NO (not large), it is determined whether or not the difference between the quality value in the quality information including the terminal device address and the predetermined value is larger than the predetermined value (S305). That is, it is determined whether or not the difference between the quality value and the target value for the quality value is greater than a predetermined threshold value.

Here, if it is determined as YES (large),
. The determination result is displayed such as failure of the server that transmits data to the terminal device D or a similar video display device (S307), and the process ends.

On the other hand, if determined as NO (below threshold),
. The determination result is displayed so that there is no reproducibility (S309), and the process ends.

  If YES in step S303, path information including the terminal device address (hereinafter simply referred to as path information) is read from the second network information, and it is determined whether the number of elements in the path information is 2 or not. (S311).

If it is determined as YES (the number of elements is 2), there is no relay device between the gateway device and the terminal device.
. The determination result is displayed as if the terminal device is out of order (S313), and the process ends.

  If it is determined NO (the number of elements is 3 or more), there is a relay device between the gateway device and the terminal device, and therefore processing is performed one by one for the address of the relay device. The address of the relay device is an address other than the terminal device address in the path information.

  First, 0 is set to the relay device number variable j, which is a variable for the number of relay devices (S315).

  Next, the path information includes the quality value in the quality information including the address in the element having the number of relay devices equal to the relay device number variable j and the terminal device address and the address of the terminal device (not including other addresses). It is determined whether or not the difference from the quality value in the quality information is larger than a predetermined value (S317).

  If it is determined as YES (large), the difference between the quality value in the quality information including the address in the element having the number of relay devices equal to the relay device number variable j and the address of the terminal device is a predetermined value. It is determined whether or not the value is larger than the predetermined value (S319). That is, it is determined whether or not the difference between the quality value and the target value for the quality value is greater than a predetermined threshold value.

If it is determined as YES (large),
. There is a problem (interference) with a relay device having an address in an element including the relay device number variable j in the path information or another terminal device connected to this relay device.
Is displayed (S321), and the process ends.

If NO (not big),
. The determination result that the terminal device has failed is displayed (S323), and the process ends.

  When it is determined NO (not large) in step S317, 1 is added to the relay device number variable j (S325), and the relay device number variable j is equal to the number of relay devices in the element including the terminal device address in the path information. It is determined whether or not (S327).

If it is determined to be YES, that is, if processing is completed for all relay devices,
. The determination result that the terminal device is out of order is displayed (S329), and the process ends.

  On the other hand, if NO is determined, that is, if the processing has not been completed for all the relay devices, the process returns to step S317.

  The operator notifies the user of the displayed contents, thereby repairing, for example, the terminal device, the relay device, the gateway device, the cable, the port, and the like, so that the network N operates correctly.

  As described above, according to the second embodiment, one or more terminal devices 2 included in the tree-type network, one or more relay devices 3 included in the network, a gateway device G included in the network, and If the network inspection apparatus S connected to the gateway apparatus G is included, the network is operating correctly, and, for each terminal apparatus 2, the terminal apparatus 2 receives data destined for the terminal apparatus 2. A network inspection system using the quality when the quality values indicating the quality related to the reception of the data in each device in the path from the gateway device G to the terminal device 2 are equal to each other. Includes a device information storage unit 21 in which device information including the address of the terminal device 2 is stored in advance, a device information transmission unit 22 that transmits the device information read from the device information storage unit into the network, Each relay device 3 includes a quality information generation unit 23 that generates quality information including quality values indicating the quality related to reception of data destined for the end device 2 and the address of the terminal device 2 and sends the information to the network. A port information storage unit 31 in which port information including a port type indicating a type of a port provided in the relay device 3 is stored for each port provided in the relay device 3, and an address in the received device information A port information update unit 32 to be included in the port information corresponding to the port that received the information, and an address table including each port information read from the port information storage unit and the address of the relay device 3 are generated and transmitted to the network For each terminal device 2, a quality value indicating the quality related to reception at the relay device 3 of data destined for the terminal device 2, The gateway device G includes a quality information generation unit 34 that generates quality information including the address of the end device 2 and the address of the relay device 3 and sends the quality information and the received quality information to the network. A device information storage unit 41 in which device information including the address of the gateway device G is stored in advance, a device information transmission unit 42 for transmitting the device information read from the device information storage unit 41 into the network, and the gateway device A port information storage unit 43 for storing port information including a port type indicating a port type corresponding to a network included in G, and an address in the received device information, and port information corresponding to the port that has received the device information. Port information updating unit 44 to be included in the port information, and the address information including the port information read from port information storage unit 43 and the address of gateway device G Address table generating unit 45 for generating a table, address table generating unit 45 for generating an address table including the port information read from the port information storage unit 43 and the address of the gateway device G, and the received address table and the generation Based on the address table thus obtained, for each terminal device 2, the path information about the path from the gateway device G to the terminal device, including the element including the address of the gateway device and the gateway device other than the gateway device in the path For each device, a network information generation unit (46, 46) that generates path information having elements including the number of relay devices between the device and the gateway device and the address of the device, and generates network information including each path information. 48), a network information storage unit (49) for storing the network information, and a network information storage Network information transmission unit 410 that reads out network information from network device S and transmits the network information to network inspection device S, and for each terminal device 2, a quality value indicating the quality related to reception of data destined for terminal device 2 at gateway device G, and A quality information generation unit 413 that generates quality information including the address of the terminal device 2 and the address of the gateway device G, and transmits the quality information and the received quality information to the network inspection device S; The device S is one of one or more terminal devices 2 and a network information storage unit (52) in which received network information is stored, a quality information storage unit 58 in which received quality information is stored. In the network, the address of the terminal device 2 known not to operate correctly, the network information read from the network information storage unit (52), and the quality information read from the quality information storage unit 58 are used. And a checking unit 53 for checking the location where quality is degraded.

  In addition, the quality check in the quality information including the address of the gateway device G and the address of the terminal device 2 that is known not to operate correctly, and the quality value in the quality information including the address of the terminal device 2 A first step (S303) for determining whether or not the difference between the two is greater than a predetermined value, and if it is determined that the difference is not large in the first step, A second step (S305) for determining whether or not the difference between the quality value and the predetermined value is larger than the predetermined value, and if it is determined that the difference is larger in the first step, the address of the terminal device 2 by the network information A third step (S311) for determining whether or not the number of elements in the path information having elements including 2 is 2, and a variable for the number of relay devices when it is determined in the third step that the number of elements is not 2 Relay A fourth step (S315) for setting the value variable to 0, and in the quality information including the address in the element having the number of relay devices equal to the relay device number variable in the path information and the address of the terminal device 2 The fifth step (S317) for determining whether or not the difference between the quality value and the quality value in the quality information including the address of the terminal device 2 is larger than a predetermined value, and the fifth step is determined to be large. If the difference between the quality value in the quality information including the address in the element having the number of relay devices equal to the relay device number variable and the address of the terminal device 2 is greater than the predetermined value, If it is determined in the sixth step (S319) and the fifth step that it is not large, 1 is added to the relay device number variable, and the relay device number variable is included in the path information in the terminal. And the seventh step (S325, S327) for determining whether or not the number of relay devices in the element including the address of device 2 is equal, and if it is determined in the seventh step that it is not equal, It is characterized by returning.

  Therefore, it is possible to inspect a place where quality is deteriorated on the net.

  Further, since the terminal device and the relay device themselves transmit device information, it is not necessary to always open the listening port, the processing load can be reduced, and it is safe in view of security.

[Third Embodiment]
Since the configuration of the network inspection system according to the third embodiment is the same as that of the first and second embodiments, illustration and description thereof are omitted. In addition, the same or similar components as those in the first and second embodiments are denoted by the same reference numerals, and the description will be omitted or simplified, or differences will be mainly described.

  In the third embodiment, if the network N is operating correctly and, for each terminal device, the terminal device receives data destined for the terminal device, the quality related to reception of the data by the terminal device , The quality value indicating the quality value related to the reception of the data in each device in the path from the gateway device to the terminal device and the quality value indicating the quality related to the transmission of the data are equal to each other Is used for quality inspection.

  The quality value is, for example, throughput, and when data is a packet that is transmitted and received sequentially, the throughput is the number of packets that are transmitted or received per unit time. In this case, the quality value may be an average or variance of packet reception intervals or transmission intervals. The quality value is a ratio of the number of packets not stored in the reception buffer to the number of packets received per unit time or the ratio of the number of packets not transmitted to the number of packets stored in the transmission buffer per unit time, that is, packet loss. It may be a rate. Further, the quality value may be a combination of these quality values.

  Hereinafter, a network inspection method by the network inspection system 1 according to the third embodiment will be described.

(1) Transmission of device information (2) Update of port information (3) Generation and transmission of address table (4) Generation and storage of first network information (5) Generation and storage of second network information (6) Transmission of Network Information Reception of device information in the gateway device and transmission of the device information to the network inspection device are the same as those in the first and second embodiments.

(7) Quality Information Transmission Quality information generation and transmission in the terminal device 2 shown in FIG. 11 are the same as those in the second embodiment.

  In the relay device 3 shown in FIG. 12, the quality information generation unit 34 relays, for each terminal device, a quality value indicating quality related to transmission in the data relay device destined for the terminal device and data relay destined for the terminal device. Quality information including a quality value indicating reception quality in the device, the address of the terminal device, and the address of the relay device is generated, and the quality information and the received quality information are transmitted into the network N. The quality information may be received by the gateway apparatus G, and the method may be appropriately selected from broadcast, multicast, unicast, and the like. Further, the transmission of the quality information does not have to be stopped forever, and may be performed at regular intervals, for example. Further, the quality information may be included in information transmitted for other purposes.

  In the gateway device G shown in FIG. 13, the quality information generation unit 413 has, for each terminal device, a quality value indicating quality related to transmission in the gateway device of data destined for the terminal device and a data gateway destined for the terminal device. Quality information including the quality value indicating the quality related to reception in the device, the address of the terminal device, and the address of the gateway device is generated and stored in the quality information storage unit 414. The quality information generation unit 413 reads the quality information from the quality information storage unit 414 and transmits it to the network inspection device S when there is a request from the network inspection device S or when there is no request.

  In the network inspection apparatus S shown in FIG. 14, the quality information is received and stored in the quality information storage unit 58.

(8) Inspection of quality deterioration in network N (quality inspection)
As in the first and second embodiments, the inspection unit 53 determines whether or not the terminal device address is present in the first network information. If it is determined NO, the inspection unit 53 is connected to the network N. On the other hand, an inspection of a portion that is not connected (referred to as a connection inspection) is performed. On the other hand, if YES is determined, a portion of the network N where the quality is degraded is inspected (referred to as a quality inspection).

  17 and 18 are flowcharts showing a quality inspection method according to the third embodiment.

  First, it is determined whether or not the difference between the quality value related to transmission in the quality information including the address of the gateway device and the terminal device address and the quality value related to reception in the quality information including the terminal device address is greater than a predetermined value. (S401).

  When it is determined as NO (not large), it is determined whether or not the difference between the quality value related to transmission and the quality value related to reception in the quality information including the address of the gateway device and the terminal device address is larger than a predetermined value. (S403).

If it is determined as YES (large),
. The determination result is displayed so that the gateway device is out of order (S405), and the process ends.

  When it is determined as NO (not large), it is determined whether or not the difference between the quality value related to reception in the quality information including the address of the gateway device and the terminal device address and the predetermined value is larger than the predetermined value. (S407). That is, it is determined whether or not the difference between the quality value and the target value for the quality value is greater than a predetermined threshold value.

If it is determined as YES (large),
. The determination result is displayed such as failure of a server that transmits data to the terminal device D or a similar video display device (S409), and the process ends.

If NO (not big),
. There is no reproducibility. Two determination results are displayed such that the terminal device is out of order (S411), and the process ends.

  If YES in step S401, it is determined whether the number of elements in the path information (hereinafter simply referred to as path information) having elements including the terminal device address in the second network information is two (step S401). S413).

If YES (number of elements is 2),
. The determination result is displayed as if the terminal device is out of order (S414), and the process ends.

  If it is determined NO (the number of elements is 3 or more), 0 is set in the relay device number variable j, which is a variable for the number of relay devices (S415), and the number of relay devices equal to the relay device number variable j in the path information is set. The difference between the quality value related to reception in the quality information including the address in the element and the terminal device address and the quality value in the quality information including the terminal device address (not including other addresses) (that is, the quality value related to reception) Is greater than a predetermined value (S417).

  If YES (large), the quality value related to reception and the quality value related to transmission in the quality information including the address in the element having the number of relay devices equal to the relay device number variable j and the terminal device address in the path information It is determined whether or not the difference is greater than a predetermined value (S419). That is, it is determined whether or not the difference between the quality value and the target value for the quality value is greater than a predetermined threshold value.

If it is determined as YES (large),
. There is a problem (interference) with a relay device having an address in an element including the relay device number variable j in the path information or another terminal device connected to this relay device.
Is displayed (S421), and the process ends.

If NO (not big),
. The determination result that the terminal device has failed is displayed (S423), and the process ends.

  If it is determined NO (not large) in step S417, 1 is added to the relay device number variable j (S425), and the relay device number variable j is equal to the number of relay devices in the element including the terminal device address in the path information. It is determined whether or not (S427).

  If it is determined YES (equal), that is, if the processing is completed for all the relay devices, the process proceeds to step S423. On the other hand, if NO (not equal) is determined, the processing is completed for all the relay devices. If not, the process returns to step S417.

  The operator notifies the user of the displayed contents, thereby repairing, for example, the terminal device, the relay device, the gateway device, the cable, the port, and the like, so that the network N operates correctly.

  As described above, according to the third embodiment, one or more terminal devices 2 included in a tree-type network, one or more relay devices 3 included in the network, a gateway device G included in the network, and Including the network inspection device S connected to the gateway device G, the network is operating correctly, and for each terminal device 2, the terminal device 2 receives data destined for the terminal device 2. Then, the quality value indicating the quality related to the reception of the data in the terminal device 2, the quality value indicating the quality related to the reception of the data in each device in the path from the gateway device G to the terminal device 2, and the transmission of the data In the network inspection system using the quality when the quality values indicating the quality are equal to each other, each terminal device 2 includes device information including the address of the terminal device 2 The device information storage unit 21 stored in advance, the device information transmission unit 22 that transmits the device information read from the device information storage unit 21 to the network, and the quality related to the reception of data destined for the terminal device 2 are shown. A quality information generation unit 23 configured to generate quality information including a quality value, a quality value indicating quality related to transmission of the data, and an address of the terminal device 2 and send the information to the network, and each relay device 3 includes A port information storage unit 31 that stores port information including a port type indicating the type of port provided in the device 3 for each port provided in the relay device 3, and receives the device information for an address in the received device information The port information update unit 32 to be included in the port information corresponding to the selected port, each port information read from the port information storage unit 31, and an address including the address of the relay device 3 An address table generation unit 33 that generates a table and sends it to the network, and for each terminal device 2, a quality value indicating the quality of reception of data destined for the terminal device 2 in the relay device 3 and the relay of the data Quality that includes a quality value indicating the quality related to transmission in the device 3, the address of the terminal device 2, and the address of the relay device 3, and sends the quality information and the received quality information to the network The gateway device G includes a device information storage unit 41 in which device information including the address of the gateway device G is stored in advance, and device information read from the device information storage unit 41 in the network. The port information including the port type indicating the type of port corresponding to the network provided in the gateway device G and the device information transmission unit 42 to be transmitted is stored. Port information storage unit 43, port information update unit 44 that includes the address in the received device information in the port information corresponding to the port that received the device information, port information read from port information storage unit 43, and From the gateway device G to the terminal device 2 for each terminal device 2 by the address table generating unit 45 that generates an address table including the address of the gateway device G, and the received address table and the generated address table. Path information regarding the path from the gateway device G to the terminal device 2, including an element including the address of the gateway device G and the gateway device G other than the gateway device G in the path For each device, the number of relay devices between the device and the gateway device G A network information generation unit (46, 48) for generating path information having elements including the address of the device and generating network information including the path information, and a network information storage unit (49) for storing the network information. ), A network information transmission unit 410 that reads out network information from the network information storage unit and transmits the network information to the network inspection device S, and for each terminal device 2, the reception at the gateway device G of data destined for the terminal device 2 Generating quality information including a quality value indicating quality, a quality value indicating quality related to transmission of the data in the gateway device G, an address of the terminal device 2 and an address of the gateway device G, and receiving the quality information and receiving A quality information generation unit 413 that transmits the quality information to be transmitted to the network inspection device S. The network inspection device S includes a network information storage unit (52) in which received network information is stored. The quality information storage unit 58 that stores the received quality information, and the address and network information storage unit (52 of one of the one or more terminal devices 2 that are known to be not operating correctly. ) And an inspection unit 53 that inspects a location where the quality of the network is degraded by the network information read from the quality information storage unit 58.

  In addition, the inspection includes a quality value related to transmission in the quality information including the address of the gateway device G and the address of the terminal device 2 known to be not operating correctly, and the quality information including the address of the terminal device 2 A first step (S401) for determining whether or not the difference from the quality value related to reception is greater than a predetermined value, and if it is determined that the difference is not large in the first step, the address of the gateway device G and the terminal A second step (S403) for determining whether or not the difference between the quality value related to transmission and the quality value related to reception in the quality information including the address of the device 2 is larger than a predetermined value; If it is determined that there is no quality value related to reception in the quality information including the address of the gateway device G and the address of the terminal device 2 and a predetermined value, In the third step (S407) for determining whether or not the difference is greater than a predetermined value, and in the case where it is determined that the difference is large in the first step, in the path information having an element including the address of the terminal device 2 in the network information In the fourth step (S413) for determining whether or not the number of elements is 2, and in the case where it is determined in the fourth step that the number of elements is not 2, 0 is set to the relay apparatus number variable which is a variable for the number of relay apparatuses. 5th step (S415, S417) to be set, and the quality value related to reception in the quality information including the address in the element having the number of relay devices equal to the number of relay devices in the path information and the address of the terminal device 2 And the sixth step for determining whether or not the difference between the quality value related to reception in the quality information including the address of the terminal device 2 is greater than a predetermined value, and the sixth step is determined to be large In this case, the difference between the quality value related to reception and the quality value related to transmission in the quality information including the address in the element having the number of relay devices equal to the number of relay devices in the path information and the address of the terminal device 2 is A seventh step for determining whether or not the value is larger than a predetermined value (S419). If it is determined that the value is not larger in the seventh step, 1 is added to the relay device number variable, and the relay device number variable is The path information includes an eighth step (S425, S427) for determining whether or not the number of relay devices in the element including the address of the terminal device 2 is equal, and if determined to be not equal in the eighth step, The process returns to the fifth step.

  Therefore, it is possible to inspect a place where quality is deteriorated on the net.

  Further, since the terminal device and the relay device themselves transmit device information, it is not necessary to always open the listening port, the processing load can be reduced, and it is safe in view of security.

  In addition, said embodiment is an Example of this invention, You may implement it changing an aspect suitably. For example, the configuration of the network N is not limited to that shown in FIG. Only a specific network may be inspected.

  As described above, according to the embodiment of the present invention, it is possible to classify a location where the network is not connected or a location where the quality is degraded in the network, so that it is possible to reduce the response time with the user.

  In addition, it is possible to reduce inquiries to the manufacturer of the device that has not failed.

  In the present embodiment, the content displayed on the network inspection device S or the content and the inquiry destination may be displayed on the terminal device. As a result, inquiries from the user to the manufacturer can be reduced. A similar effect can be obtained even if the network inspection device S is provided in the user's home.

  In addition, if a user finds out a malfunctioning device through a telephone inquiry, the phone is transferred to the support center of the manufacturer of the device, and the user collects a fee for the service, so that a profit can be expected. it can.

  In addition, if such a service is performed, the number of inquiries to the manufacturer of the device that has not failed is reduced, so that the corresponding fee can be collected from the manufacturer and the profit can be expected.

  A computer program for causing the network inspection system to execute the network inspection method according to the present embodiment is stored in a computer-readable recording medium such as a semiconductor memory, a magnetic disk, an optical disk, a magneto-optical disk, or a magnetic tape, The computer program may be distributed through display or the like, or the computer program may be transmitted via a communication network such as the Internet.

It is a lineblock diagram of the network inspection system concerning a 1st embodiment. It is a lineblock diagram of each terminal unit concerning a 1st embodiment. It is a block diagram of each relay apparatus which concerns on 1st Embodiment. It is a lineblock diagram of gateway device G concerning a 1st embodiment. It is a block diagram of the network inspection apparatus which concerns on 1st Embodiment. It is a figure which shows the example of the port information in each apparatus. It is a part of flowchart which shows the production | generation method of path information. It is a part of flowchart which shows the production | generation method of path information. It is a flowchart which shows the production | generation method of 2nd network information. It is a flowchart which shows the method of the connection test | inspection which concerns on 1st Embodiment. It is a block diagram of each terminal device which concerns on 2nd Embodiment. It is a block diagram of each relay apparatus which concerns on 2nd Embodiment. It is a block diagram of the gateway apparatus which concerns on 2nd Embodiment. It is a block diagram of the network inspection apparatus which concerns on 2nd Embodiment. It is a part of flowchart which shows the method of the quality inspection which concerns on 2nd Embodiment. It is a part of flowchart which shows the method of the quality inspection which concerns on 2nd Embodiment. It is a part of flowchart which shows the method of the quality inspection which concerns on 3rd Embodiment. It is a part of flowchart which shows the method of the quality inspection which concerns on 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Network inspection system 3, S1, S2, W1, W2 ... Relay device 2, AD ... Terminal device 11, 21, 41, 411 ... Device information storage part 22, 42, 412 ... Device information transmission part 23, 34, 413 ... Quality information generation unit 31, 43 ... Port information storage unit 32, 44 ... Port information update unit 33, 45 ... Address table generation unit 46 ... First network information generation unit 47, 51 ... First network information Storage unit 48 ... second network information generation unit 49, 52 ... second network information storage unit 53 ... inspection unit 54 ... display unit 55 ... database 56 ... device information storage unit 57 ... input unit 58 ... quality information storage unit 410 ... Network information transmission unit 414 ... Quality information storage unit G ... Gateway device N ... Network S ... Network inspection device i, j ... Relay device number variable

Claims (11)

A network inspection system including one or more terminal devices included in a tree-type network, one or more relay devices included in the network, a gateway device included in the network, and a network inspection device connected to the gateway device There,
Each terminal device is
A device information storage unit in which device information including an address of the terminal device is stored in advance;
A device information transmission unit that transmits the device information read from the device information storage unit to the network;
Each of the relay devices is
A port information storage unit that stores port information including a port type indicating a type of a port provided in the relay device for each port provided in the relay device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including each port information read from the port information storage unit and the address of the relay device and sends the address table to the network;
The gateway device is
A device information storage unit in which device information including an address of the gateway device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
A port information storage unit for storing port information including a port type indicating a type of a port corresponding to the network provided in the gateway device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including the port information read from the port information storage unit and the address of the gateway device;
Based on the received address table and the generated address table, for each terminal device, path information about the path from the gateway device to the terminal device, the element including the address of the gateway device, and the path For each device other than the gateway device, first path information including elements including the number of relay devices between the device and the gateway device and the address of the device is generated, and network information including the path information is first. A first network information generation unit for generating the network information of
A first network information storage unit for storing the first network information;
Based on the newly generated first network information and the first network information read from the first network information storage unit, second network information which is network information when the network is operating correctly is obtained. A second network information generation unit for generating;
A second network information storage unit for storing the second network information;
A network information transmission unit that reads first network information from the first network information storage unit and reads second network information from the second network information storage unit and transmits the second network information to the network inspection device;
The network inspection device
A first network information storage unit for storing the received first network information;
A second network information storage unit for storing the received second network information;
The address of a terminal device that is one of the one or more terminal devices and is known not to operate correctly, the first network information read from the first network information storage unit, and the second network information A network inspection system comprising: an inspection unit that inspects an unconnected portion in the network based on second network information read from the storage unit. The inspection
A first step of determining whether or not the number of elements in path information having an element including an address of a terminal device known to be not operating correctly in the second network information is two;
A second step of setting 0 to a relay device number variable that is a variable for the number of relay devices when the number of elements is not two;
A third step of determining whether or not an address in an element having a number of relay devices equal to the number of relay devices in the path information exists in the first network information;
A fourth step for determining whether or not the relay device number variable is zero when it is determined that the third step does not exist;
If it is determined in the third step, 1 is added to the relay device number variable, and the relay device number variable is equal to the number of relay devices in the element including the address of the terminal device in the path information. And a fifth step of determining whether or not
The network inspection system according to claim 1, wherein if it is determined in the fifth step that they are not equal, the process returns to the third step. One or more terminal devices included in a tree-type network, one or more relay devices included in the network, a gateway device included in the network, and a network inspection device connected to the gateway device, If the terminal device is operating correctly and the terminal device receives data destined for the terminal device, the data in each device in the path from the gateway device to the terminal device A network inspection system using the quality when the quality values indicating the quality related to the reception are equal to each other,
Each terminal device is
A device information storage unit in which device information including an address of the terminal device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
A quality information generating unit that generates quality information that includes a quality value indicating quality related to reception of data destined for the terminal device and an address of the terminal device, and transmits the quality information to the network;
Each of the relay devices is
A port information storage unit that stores port information including a port type indicating a type of a port provided in the relay device for each port provided in the relay device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including each port information read from the port information storage unit and the address of the relay device, and sends the address table to the network;
For each terminal device, quality information including a quality value indicating the quality of reception of data destined for the terminal device at the relay device, an address of the terminal device, and an address of the relay device is generated, and the quality information And a quality information generator for sending the received quality information into the network,
The gateway device is
A device information storage unit in which device information including an address of the gateway device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
A port information storage unit for storing port information including a port type indicating a type of a port corresponding to the network provided in the gateway device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including the port information read from the port information storage unit and the address of the gateway device;
Based on the received address table and the generated address table, for each terminal device, path information about the path from the gateway device to the terminal device, the element including the address of the gateway device, and the path A network that generates path information having elements including the number of relay devices between the apparatus and the gateway apparatus and the address of the apparatus for each apparatus other than the gateway apparatus, and generates network information including the path information An information generator,
A network information storage unit for storing the network information;
A network information transmission unit that reads network information from the network information storage unit and transmits the network information to the network inspection device;
For each terminal device, quality information including a quality value indicating the quality of reception of data destined for the terminal device in the gateway device, an address of the terminal device, and an address of the gateway device is generated, and the quality information And a quality information generator for transmitting the received quality information to the network inspection device;
With
The network inspection device
A network information storage unit for storing received network information;
A quality information storage unit for storing the received quality information;
One of the one or more terminal devices, and the address of the terminal device that is known not to operate correctly, the network information read from the network information storage unit, and the quality information read from the quality information storage unit A network inspection system comprising: an inspection unit that inspects a location where quality is degraded in the network. The inspection
The difference between the quality value in the quality information that includes the address of the gateway device and the address of the terminal device that is known not to operate correctly and the quality value in the quality information that includes the address of the terminal device is a predetermined value. A first step of determining whether the value is greater than a value;
A second step for determining whether or not a difference between a quality value in the quality information including the address of the terminal device and a predetermined value is larger than a predetermined value when it is determined that the first step is not large; When,
A third step of determining whether or not the number of elements in the path information having an element including the address of the terminal device in the network information is 2 when it is determined that the first step is large;
A fourth step of setting 0 to a relay device number variable that is a variable for the number of relay devices when it is determined in the third step that the number of elements is not 2;
In the path information, the quality value in the quality information including the address in the element having the number of relay devices equal to the relay device number variable and the address of the terminal device, and the quality value in the quality information including the address of the terminal device, A fifth step of determining whether the difference between the two is greater than a predetermined value;
If it is determined in the fifth step that it is large, the quality value in the quality information including the address in the element having the number of relay devices equal to the relay device number variable and the address of the terminal device, and a predetermined value A sixth step for determining whether or not the difference is greater than a predetermined value;
If it is determined in the fifth step that the value is not large, 1 is added to the relay device number variable, and the relay device number variable is equal to the number of relay devices in the element including the address of the terminal device in the path information. A seventh step of determining whether or not
The network inspection system according to claim 3, wherein if it is determined in the seventh step that they are not equal, the process returns to the fifth step. One or more terminal devices included in a tree-type network, one or more relay devices included in the network, a gateway device included in the network, and a network inspection device connected to the gateway device, If the terminal device is operating correctly and the terminal device receives data destined for the terminal device, a quality value indicating the quality related to reception of the data in the terminal device, the gateway A network inspection system that uses the quality when the quality value indicating the reception of the data in each device in the path from the device to the terminal device and the quality value indicating the quality of the data transmission are equal to each other. There,
Each terminal device is
A device information storage unit in which device information including an address of the terminal device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
Quality information generation for generating quality information including quality values related to reception of data destined for the terminal device, quality values indicating quality related to transmission of the data, and addresses of the terminal devices, and transmitting the quality information to the network With
Each of the relay devices is
A port information storage unit that stores port information including a port type indicating a type of a port provided in the relay device for each port provided in the relay device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including each port information read from the port information storage unit and the address of the relay device, and sends the address table to the network;
For each terminal device, a quality value indicating quality related to reception of data destined for the terminal device in the relay device, a quality value indicating quality related to transmission of the data in the relay device, an address of the terminal device, and the relay A quality information generation unit that generates quality information including an address of the device, and sends the quality information and the received quality information into the network,
The gateway device is
A device information storage unit in which device information including an address of the gateway device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
A port information storage unit for storing port information including a port type indicating a type of a port corresponding to the network provided in the gateway device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including the port information read from the port information storage unit and the address of the gateway device;
Based on the received address table and the generated address table, the path information about the path from the gateway apparatus to the terminal apparatus for each terminal apparatus, and the path information from the gateway apparatus to the terminal apparatus The path information includes an element including the address of the gateway device, and an element including the number of relay devices between the device and the gateway device and the address of the device for each device other than the gateway device in the path. A network information generation unit that generates path information and generates network information including each path information;
A network information storage unit for storing the network information;
A network information transmission unit that reads network information from the network information storage unit and transmits the network information to the network inspection device;
For each terminal device, a quality value indicating the quality related to reception of data destined for the terminal device in the gateway device, a quality value indicating quality related to transmission of the data in the gateway device, an address of the terminal device, and the gateway A quality information generation unit that generates quality information including an address of the device, and transmits the quality information and the received quality information to the network inspection device,
The network inspection device
A network information storage unit for storing received network information;
A quality information storage unit for storing the received quality information;
One of the one or more terminal devices, and the address of the terminal device that is known not to operate correctly, the network information read from the network information storage unit, and the quality information read from the quality information storage unit A network inspection system comprising: an inspection unit that inspects a location where quality is degraded in the network. The inspection
A quality value related to transmission in the quality information including the address of the gateway device and an address of the terminal device known not to operate correctly, and a quality value related to reception in the quality information including the address of the terminal device. A first step of determining whether the difference is greater than a predetermined value;
When it is determined that the first step is not large, the difference between the quality value related to transmission and the quality value related to reception in the quality information including the address of the gateway device and the address of the terminal device is more than a predetermined value. A second step of determining whether or not it is larger;
If it is determined in the second step that the value is not large, the difference between the quality value related to reception in the quality information including the address of the gateway device and the address of the terminal device and a predetermined value is larger than the predetermined value A third step for determining whether or not,
A fourth step of determining whether or not the number of elements in the path information having elements including the address of the terminal device in the network information is 2 when it is determined to be large in the first step;
A fifth step of setting 0 to a relay device number variable that is a variable for the number of relay devices when it is determined in the fourth step that the number of elements is not 2;
In the path information, the quality value related to reception in the quality information including the address in the element having the number of relay devices equal to the relay device number variable and the address of the terminal device, and the reception in the quality information including the address of the terminal device A sixth step of determining whether or not the difference between the quality value with respect to is greater than a predetermined value;
If it is determined that the value is large in the sixth step, the quality value related to reception in the quality information including the address in the element having the number of relay devices equal to the number of relay devices in the path information and the address of the terminal device And a seventh step of determining whether or not a difference between the transmission quality value and the transmission quality value is larger than a predetermined value;
If it is determined in the seventh step that the value is not large, 1 is added to the relay device number variable, and whether the relay device number variable is equal to the number of relay devices in the element including the address of the terminal device in the path information. And an eighth step of determining whether or not
The network inspection system according to claim 5, wherein if it is determined in the eighth step that they are not equal, the process returns to the fifth step. A network inspection system including one or more terminal devices included in a tree-type network, one or more relay devices included in the network, a gateway device included in the network, and a network inspection device connected to the gateway device There,
Each terminal device is
A device information storage unit in which device information including an address of the terminal device is stored in advance;
A device information transmission unit that transmits the device information read from the device information storage unit to the network;
Each of the relay devices is
A port information storage unit that stores port information including a port type indicating a type of a port provided in the relay device for each port provided in the relay device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including each port information read from the port information storage unit and the address of the relay device and sends the address table to the network;
The gateway device is
A device information storage unit in which device information including an address of the gateway device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
A port information storage unit for storing port information including a port type indicating a type of a port corresponding to the network provided in the gateway device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including the port information read from the port information storage unit and the address of the gateway device;
Based on the received address table and the generated address table, for each terminal device, path information about the path from the gateway device to the terminal device, the element including the address of the gateway device, and the path For each device other than the gateway device, first path information including elements including the number of relay devices between the device and the gateway device and the address of the device is generated, and network information including the path information is first. A first network information generation unit for generating the network information of
A first network information storage unit for storing the first network information;
Based on the newly generated first network information and the first network information read from the first network information storage unit, second network information which is network information when the network is operating correctly is obtained. A second network information generation unit for generating;
A second network information storage unit for storing the second network information;
A network information transmission unit that reads first network information from the first network information storage unit and reads second network information from the second network information storage unit and transmits the second network information to the network inspection device;
The network inspection device
A first network information storage unit for storing the received first network information;
A second network information storage unit for storing the received second network information;
The address of a terminal device that is one of the one or more terminal devices and is known not to operate correctly, the first network information read from the first network information storage unit, and the second network information A network inspection method in a network inspection system, comprising: an inspection unit that inspects an unconnected portion in the network based on second network information read from a storage unit;
The network inspection method includes:
A first step of determining whether or not the number of elements in path information having an element including an address of a terminal device known to be not operating correctly in the second network information is two;
A second step of setting 0 to a relay device number variable that is a variable for the number of relay devices when the number of elements is not two;
A third step of determining whether or not an address in an element having a number of relay devices equal to the number of relay devices in the path information exists in the first network information;
A fourth step for determining whether or not the relay device number variable is zero when it is determined that the third step does not exist;
If it is determined in the third step, 1 is added to the relay device number variable, and the relay device number variable is equal to the number of relay devices in the element including the address of the terminal device in the path information. And a fifth step of determining whether or not
A network inspection method, comprising: returning to the third step when it is determined that they are not equal in the fifth step. One or more terminal devices included in a tree-type network, one or more relay devices included in the network, a gateway device included in the network, and a network inspection device connected to the gateway device, If the terminal device is operating correctly and the terminal device receives data destined for the terminal device, the data in each device in the path from the gateway device to the terminal device A network inspection system using the quality when the quality values indicating the quality related to the reception are equal to each other,
Each terminal device is
A device information storage unit in which device information including an address of the terminal device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
A quality information generating unit that generates quality information that includes a quality value indicating quality related to reception of data destined for the terminal device and an address of the terminal device, and transmits the quality information to the network;
Each of the relay devices is
A port information storage unit that stores port information including a port type indicating a type of a port provided in the relay device for each port provided in the relay device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including each port information read from the port information storage unit and the address of the relay device, and sends the address table to the network;
For each terminal device, quality information including a quality value indicating the quality of reception of data destined for the terminal device at the relay device, an address of the terminal device, and an address of the relay device is generated, and the quality information And a quality information generator for sending the received quality information into the network,
The gateway device is
A device information storage unit in which device information including an address of the gateway device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
A port information storage unit for storing port information including a port type indicating a type of a port corresponding to the network provided in the gateway device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including the port information read from the port information storage unit and the address of the gateway device;
Based on the received address table and the generated address table, for each terminal device, path information about the path from the gateway device to the terminal device, the element including the address of the gateway device, and the path A network that generates path information having elements including the number of relay devices between the apparatus and the gateway apparatus and the address of the apparatus for each apparatus other than the gateway apparatus, and generates network information including the path information An information generator,
A network information storage unit for storing the network information;
A network information transmission unit that reads network information from the network information storage unit and transmits the network information to the network inspection device;
For each terminal device, quality information including a quality value indicating the quality of reception of data destined for the terminal device in the gateway device, an address of the terminal device, and an address of the gateway device is generated, and the quality information And a quality information generator for transmitting the received quality information to the network inspection device;
With
The network inspection device
A network information storage unit for storing received network information;
A quality information storage unit for storing the received quality information;
One of the one or more terminal devices, and the address of the terminal device that is known not to operate correctly, the network information read from the network information storage unit, and the quality information read from the quality information storage unit A network inspection method in a network inspection system, comprising: an inspection unit that inspects a location where quality is deteriorated in the network,
The network inspection method includes:
The difference between the quality value in the quality information that includes the address of the gateway device and the address of the terminal device that is known not to operate correctly and the quality value in the quality information that includes the address of the terminal device is a predetermined value. A first step of determining whether the value is greater than a value;
A second step for determining whether or not a difference between a quality value in the quality information including the address of the terminal device and a predetermined value is larger than a predetermined value when it is determined that the first step is not large; When,
A third step of determining whether or not the number of elements in the path information having an element including the address of the terminal device in the network information is 2 when it is determined that the first step is large;
A fourth step of setting 0 to a relay device number variable that is a variable for the number of relay devices when it is determined in the third step that the number of elements is not 2;
In the path information, the quality value in the quality information including the address in the element having the number of relay devices equal to the relay device number variable and the address of the terminal device, and the quality value in the quality information including the address of the terminal device, A fifth step of determining whether the difference between the two is greater than a predetermined value;
If it is determined in the fifth step that it is large, the quality value in the quality information including the address in the element having the number of relay devices equal to the relay device number variable and the address of the terminal device, and a predetermined value A sixth step for determining whether or not the difference is greater than a predetermined value;
If it is determined in the fifth step that the value is not large, 1 is added to the relay device number variable, and the relay device number variable is equal to the number of relay devices in the element including the address of the terminal device in the path information. A seventh step of determining whether or not
A network inspection method, comprising: returning to the fifth step when it is determined in the seventh step that they are not equal. One or more terminal devices included in a tree-type network, one or more relay devices included in the network, a gateway device included in the network, and a network inspection device connected to the gateway device, If the terminal device is operating correctly and the terminal device receives data destined for the terminal device, a quality value indicating the quality related to reception of the data in the terminal device, the gateway A network inspection system that uses the quality when the quality value indicating the reception of the data in each device in the path from the device to the terminal device and the quality value indicating the quality of the data transmission are equal to each other. There,
Each terminal device is
A device information storage unit in which device information including an address of the terminal device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
Quality information generation for generating quality information including quality values related to reception of data destined for the terminal device, quality values indicating quality related to transmission of the data, and addresses of the terminal devices, and transmitting the quality information to the network With
Each of the relay devices is
A port information storage unit that stores port information including a port type indicating a type of a port provided in the relay device for each port provided in the relay device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including each port information read from the port information storage unit and the address of the relay device, and sends the address table to the network;
For each terminal device, a quality value indicating quality related to reception of data destined for the terminal device in the relay device, a quality value indicating quality related to transmission of the data in the relay device, an address of the terminal device, and the relay A quality information generation unit that generates quality information including an address of the device, and sends the quality information and the received quality information into the network,
The gateway device is
A device information storage unit in which device information including an address of the gateway device is stored in advance;
A device information transmission unit for transmitting the device information read from the device information storage unit to the network;
A port information storage unit for storing port information including a port type indicating a type of a port corresponding to the network provided in the gateway device;
A port information update unit that includes the address in the received device information in the port information corresponding to the port that received the device information;
An address table generating unit that generates an address table including the port information read from the port information storage unit and the address of the gateway device;
Based on the received address table and the generated address table, the path information about the path from the gateway apparatus to the terminal apparatus for each terminal apparatus, and the path information from the gateway apparatus to the terminal apparatus The path information includes an element including the address of the gateway device, and an element including the number of relay devices between the device and the gateway device and the address of the device for each device other than the gateway device in the path. A network information generation unit that generates path information and generates network information including each path information;
A network information storage unit for storing the network information;
A network information transmission unit that reads network information from the network information storage unit and transmits the network information to the network inspection device;
For each terminal device, a quality value indicating the quality related to reception of data destined for the terminal device in the gateway device, a quality value indicating quality related to transmission of the data in the gateway device, an address of the terminal device, and the gateway A quality information generation unit that generates quality information including an address of the device, and transmits the quality information and the received quality information to the network inspection device,
The network inspection device
A network information storage unit for storing received network information;
A quality information storage unit for storing the received quality information;
One of the one or more terminal devices, and the address of the terminal device that is known not to operate correctly, the network information read from the network information storage unit, and the quality information read from the quality information storage unit A network inspection method in a network inspection system, comprising: an inspection unit that inspects a location where quality is deteriorated in the network,
The network inspection method includes:
A quality value related to transmission in the quality information including the address of the gateway device and an address of the terminal device known not to operate correctly, and a quality value related to reception in the quality information including the address of the terminal device. A first step of determining whether the difference is greater than a predetermined value;
When it is determined that the first step is not large, the difference between the quality value related to transmission and the quality value related to reception in the quality information including the address of the gateway device and the address of the terminal device is more than a predetermined value. A second step of determining whether or not it is larger;
If it is determined in the second step that the value is not large, the difference between the quality value related to reception in the quality information including the address of the gateway device and the address of the terminal device and a predetermined value is larger than the predetermined value A third step for determining whether or not,
A fourth step of determining whether or not the number of elements in the path information having elements including the address of the terminal device in the network information is 2 when it is determined to be large in the first step;
A fifth step of setting 0 to a relay device number variable that is a variable for the number of relay devices when it is determined in the fourth step that the number of elements is not 2;
In the path information, the quality value related to reception in the quality information including the address in the element having the number of relay devices equal to the relay device number variable and the address of the terminal device, and the reception in the quality information including the address of the terminal device A sixth step of determining whether or not the difference between the quality value with respect to is greater than a predetermined value;
If it is determined that the value is large in the sixth step, the quality value related to reception in the quality information including the address in the element having the number of relay devices equal to the number of relay devices in the path information and the address of the terminal device And a seventh step of determining whether or not a difference between the transmission quality value and the transmission quality value is larger than a predetermined value;
If it is determined in the seventh step that the value is not large, 1 is added to the relay device number variable, and whether the relay device number variable is equal to the number of relay devices in the element including the address of the terminal device in the path information. And an eighth step of determining whether or not
If it is determined in the eighth step that they are not equal, the network inspection method returns to the fifth step.   A computer program for causing a network inspection apparatus to execute the network inspection method according to claim 7.   A computer-readable recording medium on which the computer program according to claim 10 is recorded.

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