JP2013162373A - Communication evaluation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication evaluation system which can detect faulty locations in communication.SOLUTION: There is provided a communication evaluation system 1 for a communication network 10 composed of a master unit P0 and a plurality of slave units P1 to P3, of which each of the slave units P1 to P3 themselves and the uppermost slave unit P1 and the master unit P0 are respectively connected in cable sections K1 to K3. The communication evaluation system 1 comprises: a transmission path database 3 which contains transmission path data indicating whether each of the slave units P1 to P3, each of the cables and the master unit P0 are being used or not in a communication path leading from the slave units to the master unit; determination means 4 for determining whether communication in the master unit of each slave unit is normal or not; rewrite means 5 which rewrites, as being normal, the portions of each slave unit indicated to be in use, each transmission path and the master unit in the transmission path data of the slave units determined to be normal; and detection means 6 which, from all of the rewritten transmission path data, detects, as being abnormal, the portions of each slave unit, each transmission path and the master unit which were determined to be not normal.

Description

  The present invention relates to a communication evaluation system capable of detecting a defective part in communication.

  Conventionally, in the monitoring of a network having a multi-drop connection configuration, when confirming the soundness of communication of each slave station, polling is performed at a constant cycle, and the soundness is determined by the polling timeout. Therefore, conventionally, in a tree-structured network, a method has been proposed in which a faulty part is specified in units of IP addresses by managing hierarchical information and parent-child relationships of communication devices. The network to be monitored is assumed to be an IP network composed of a plurality of routers, and the communication path is shown in the order of IP addresses given to the routers through which the network is routed. The hierarchical information and the parent-child relationship to be managed are based on the premise that communication light path information (IP address order) is acquired by a path information acquisition command that is a general-purpose protocol of an IP network (see, for example, Patent Document 1).

JP 2001-86117 A

  In the conventional technology, the information acquired by the route information acquisition command is suitable for a network that is useful for identifying a faulty part in the network. However, a multi-drop (multi-drop) in which a plurality of communication devices are directly connected to a physical transmission path. It is not suitable for an IP network with a bus) configuration. In a multi-drop configuration, the router does not pass through (no IP address is assigned to the transmission path that goes through it), so the route information acquisition command cannot acquire communication route information, and the monitored hierarchy information and parent-child relationship cannot be managed. There was a point.

  The present invention has been made to solve the above-described problems. In monitoring a multi-drop communication network in which a master unit and a plurality of slave units are directly connected to a physical transmission line, a communication network is used. It is an object of the present invention to provide a communication evaluation system that can detect a defective portion in communication based on a parent-child relationship between a slave unit and a transmission path section.

The communication evaluation system according to the present invention includes a master unit and a plurality of slave units, and each of the slave units has an upstream / downstream relationship, and the slave unit between the slave units and the uppermost stream and the master unit Is a communication evaluation system for communication networks connected to each other via a transmission line.
For each of the slave units, a transmission path database having transmission path data indicating use or non-use of each of the slave units and each of the transmission paths and the master unit in a communication path from the slave unit to the master unit;
A determination means for determining normality or abnormality of communication of each of the slave units in the master unit;
In the slave unit determined to be normal by the determination means, the slave units used in the transmission path data of the slave unit and the locations of the transmission paths and the master unit are normal. Rewriting means for rewriting,
A detecting means for detecting that each of the slave units and each transmission path and a location that is not normal in the master unit are abnormal from the entire transmission path data after being rewritten by the rewriting means; Is.

The communication evaluation system according to the present invention includes a master unit and a plurality of slave units, and each of the slave units has an upstream / downstream relationship, and the slave unit between the slave units and the uppermost stream and the master unit Is a communication evaluation system for communication networks connected to each other via a transmission line.
For each of the slave units, a transmission path database having transmission path data indicating use or non-use of each of the slave units and each of the transmission paths and the master unit in a communication path from the slave unit to the master unit;
A determination means for determining normality or abnormality of communication of each of the slave units in the master unit;
In the slave unit determined to be normal by the determination means, the slave units used in the transmission path data of the slave unit and the locations of the transmission paths and the master unit are normal. Rewriting means for rewriting,
A detecting means for detecting that each of the slave units and each transmission path and a location that is not normal in the master unit are abnormal from the entire transmission path data after being rewritten by the rewriting means; Therefore, it is possible to detect a defective part in communication.

It is the figure which showed the structure of the communication evaluation system of the communication network of Embodiment 1 of this invention. It is the figure which showed the path | route data of the path | route database of the communication evaluation system shown in FIG. It is the figure which showed the transmission line data of the transmission line database of the communication evaluation system shown in FIG. It is the figure which showed the malfunction of the communication network used for the communication evaluation system shown in FIG. It is the figure which showed the result of the detection means of the communication evaluation system in the malfunction of the communication network shown in FIG. It is the figure which showed the result of the detection means in the malfunction of the communication network in the communication evaluation system of the communication network of Embodiment 2 of this invention. It is the figure which showed the relay data of the relay database in the communication evaluation system of the communication network of Embodiment 3 of this invention. It is the figure which showed the transmission line data based on the relay data in the communication evaluation system shown in FIG.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. 1 is a diagram showing a configuration of a communication evaluation system according to Embodiment 1 of the present invention, FIG. 2 is a diagram showing route data in a route database of the communication evaluation system shown in FIG. 1, and FIG. 3 is shown in FIG. FIG. 4 is a diagram showing transmission path data in the transmission path database of the communication evaluation system, FIG. 4 is a diagram showing defects in the communication network used in the communication evaluation system shown in FIG. 1, and FIG. 5 is a communication network shown in FIG. It is the figure which showed the result of the detection means of the communication evaluation system in the malfunction.

  In the figure, a communication network 10 verified by the communication evaluation system 1 has a parent device P0 and a plurality of child devices P1 to P3 that communicate with the parent device P0. And each subunit | mobile_unit P1-P3 consists of upstream and downstream relationship. Then, a cable section K1 as a transmission path connecting the parent device P0 and the most upstream child device P1, a cable section K2 as a transmission path connecting the child device P1 and the child device P2, and a child device P2 and a child. It is comprised by the cable area K3 as a transmission line which connects the apparatus P3. The communication evaluation system 1 includes a path database 2, a transmission path database 3, a determination unit 4, a rewrite unit 5, and a detection unit 6.

  The route database 2 stores route data of one route on the upstream side in each communication of each of the slave units P1 to P3 and each of the cable sections K1 to K3. Specifically, as shown in FIG. 2, if the slave unit P1, the upstream cable section K1 is one path, and if the slave unit P2, the upstream cable section K2 is one path, and if the slave unit P3, For example, the upstream cable section K3 is one route. Further, if the cable section K1, the upstream base unit P0 has one path, if the cable section K2, the upstream cable section K1 has one path, and if the cable section K3, the upstream cable section K2 has one path. It is.

  Then, the transmission path database 3 uses the path data of the path database 2 to trace the path, so that each of the slave units P1 to P3 has a communication path from the slave units P1 to P3 to the master unit P0. Transmission path data indicating use or non-use of each of the slave units P1 to P3, each of the cable sections K1 to K3, and the master unit P0 is created and stored. Specifically, as shown in FIG. 3, the communication path from the child device P1 to the parent device P0 is first displayed as “1” because the child device P1 is used. Next, when the route data of the slave unit P1 is confirmed, since the route is “K1”, “1” is displayed because the cable section K1 is used. Next, since the cable section K1 is “P0”, “1” is displayed because the parent device P0 is used, and “−” is displayed as unused otherwise. Since the parent device P0 is the last, the creation of the transmission path data of the child device P1 is completed here. In this manner, transmission path data is similarly created for the other slave units P2 and P3. In the transmission path data of the slave unit P2, “1” is displayed in the used master unit P0, the slave unit P2, the cable section K1, and the cable section K2, and “−” as unused is indicated otherwise. Is displayed.

In the transmission path data of the slave unit P3, “1” is displayed in the used master unit P0, the slave unit P3, the cable section K1, the cable section K2, and the cable section K3. “-” Is displayed. Then, the determination unit 4 performs communication between the parent device P0 and each of the child devices P1 to P3, and determines whether or not each of the child devices P1 to P3 is normal based on the signal.
The rewriting means 5 is normal in the slave unit that is determined to be normal by the determination unit 4, and the location of the slave unit, cable section, and master unit that is used in the transmission path data of the slave unit is normal. To “0”. Then, the detecting means 6 detects that all the transmission path data after being rewritten by the rewriting means 5 are abnormal in the slave unit, the cable section, and the location that is not normal “0” of the master unit. .

  Next, the operation of the communication evaluation system of the first embodiment configured as described above will be described. First, as shown in FIG. 4A, when an abnormality occurs in the cable section K2, the determination unit 4 determines that the child device P1 is normal and the child devices P2 and P3 are abnormal. Next, the rewriting unit 5 assumes that the master unit P0, the slave unit P1, and the cable section K1 used in the transmission path data of the slave unit P1 determined to be normal by the determination unit 4 are normal. The data is rewritten from “1” to “0”, and the other child devices P2 and P3 are determined to be abnormal, and therefore are not rewritten (FIG. 5A). Then, the detection means 6 calculates the product of all the transmission path data as shown in FIG. Then, the detecting means 6 detects that the solution is not “0”, that is, the slave unit P2, the slave unit P3, the cable section K2, and the cable section K3 are abnormal sections.

  Further, as shown in FIG. 4B, when an abnormality occurs in the cable section K3, the determination unit 4 determines that the child device P1 and the child device P2 are normal and the child device P3 is abnormal. Next, the rewriting unit 5 is used in the transmission path data of the slave units P1 and P2 that are determined to be normal by the determination unit 4, and the master unit P0, the slave unit P1, the slave unit P2, and the cable. The section K1 and the cable section K2 are rewritten as “1” → “0” assuming that they are normal, and rewriting is not performed because it is determined that the other handset P3 is abnormal (FIG. 5B). Then, the detecting means 6 calculates the product of all the transmission path data as shown in FIG. Then, the detection means 6 detects that the solution is not “0”, that is, the slave device P3 and the cable section K3 are abnormal locations.

  Further, as shown in FIG. 4C, when an abnormality occurs in the cable section K1, the determination unit 4 determines that there is no normal condition and the child devices P1 to P3 are abnormal. Next, the rewriting unit 5 does not perform rewriting because there is no child device determined to be normal by the determining unit 4 and the child devices P1 to P3 are determined to be abnormal (FIG. 5C). )). Then, after the detection means 6 is rewritten by the rewrite means 5 (note that, even if there is nothing to be rewritten by the rewrite means 5 according to the judgment of the judgment means 4, it is after the rewrite by the rewrite means 5). Then, the product of all the transmission path data as shown in FIG. Then, the detecting means 6 detects that the solution is not “0”, that is, the parent device P0, the child devices P1 to P3, and the cable sections K1 to K3 are abnormal portions.

  According to the communication evaluation system of the first embodiment configured as described above, all locations that may be abnormal are determined because the locations used in communication are determined as normal locations when they are normally communicated. Can be detected.

Embodiment 2. FIG.
In the first embodiment, an example of detecting all the places that may be abnormal is shown. However, in the second embodiment, an example of detecting a defective place on the premise of occurrence of a trouble in a single place. Will be described. Since the configuration of the communication evaluation system of the second embodiment is the same as that of the first embodiment, the description thereof will be omitted as appropriate and will be described with reference to FIGS. FIG. 6 is a diagram showing the result of the detecting means in the communication network malfunction in the communication network communication evaluation system according to the second embodiment of the present invention. In the second embodiment, the rewriting unit 5 normally sets the location of each slave unit and cable section in which the transmission line data of the slave unit determined to be abnormal by the determination unit 4 is “-” unused. Rewrite as “0”.

  Next, the operation of the communication evaluation system of the second embodiment configured as described above will be described. First, since rewriting in the slave unit determined to be normal in the rewriting means 5 is the same as in the first embodiment, the rewriting is performed in the same manner as in the first embodiment. The description is omitted. First, in the case as shown in FIG. 4A, since the determination unit 4 determines that the slave units P2 and P3 are abnormal, the rewrite unit 5 uses the transmission path data of the slave units P2 and P3. The unused child device P1, child device P2, child device P3, and cable section K3 are rewritten as “−” → “0” as normal (FIG. 6A). Then, the detecting means 6 calculates the product of all transmission line data as shown in FIG. 6A rewritten by the rewriting means 5. The detecting means 6 detects that the solution is not “0”, that is, the cable section K1 is an abnormal location.

  In the case as shown in FIG. 4B, since the determination unit 4 determines that the slave unit P3 is abnormal, the rewrite unit 5 is unused in the transmission line data of the slave unit P3. The child devices P1 and P2 are rewritten as “−” → “0” as normal (FIG. 6B). Then, the detection means 6 calculates the product of all the transmission path data as shown in FIG. Then, the detection means 6 detects that the solution is not “0”, that is, the slave device P3 and the cable section K3 are abnormal locations.

  In the case as shown in FIG. 4C, since the determination unit 4 determines that the slave units P1 to P3 are abnormal, the rewrite unit 5 is not used in the transmission path data of the slave units P1 to P3. The slave units P1 to P3, the cable section K2, and the cable section K3 are rewritten as “−” → “0” as normal (FIG. 6C). Then, the detection means 6 calculates the product of all the transmission path data as shown in FIG. The detecting means 6 detects that the solution is not “0”, that is, the parent device P0 and the cable section K1 are abnormal portions.

  According to the communication evaluation system of the second embodiment configured as described above, the use location of the slave unit determined to be normal in communication and the unused location of the slave unit determined to be abnormal are set as normal locations. In order to determine, it becomes possible to detect the fault location on the assumption that the fault occurs at a single location.

Embodiment 3 FIG.
In each of the above embodiments, an example has been shown in which communication is performed directly from each slave unit to the master unit. However, the present invention is not limited to this, and in this third embodiment, relay is performed by any slave unit. Explain that there are cases where communication is performed with the base unit. Specifically, a case where the child device P3 relays to the child device P2 and communicates with the parent device P0 will be described. At this time, as shown in FIG. 7, the slave unit P2 is shown as relay data of the slave unit P3. A relay database having such relay data may be provided. Then, similar to the above embodiments, normal transmission line data is created (FIG. 8A).

  Thereafter, in the slave unit P3 in which the relay data exists, the transmission path data of the slave unit P3 includes the cable on the relay side slave unit P2 and the communication path from the relay side slave unit P2 to the master unit P0. The section is set as use (FIG. 8B). Therefore, the location that is changed as usage is only the slave device P2. As shown in FIG. 8B, the portion (*) for which “1” is displayed for use in advance is displayed as it is, and “1” for use is displayed. Then, using the transmission path data changed in this way, the same operation as in each of the above embodiments is performed, and an abnormal point can be detected in the same manner as in each of the above embodiments.

  According to the communication evaluation system of the third embodiment configured as described above, the same effects as those of the above-described embodiments can be obtained, but also when data is relayed to communicate, an abnormality is detected. can do.

  In each of the above embodiments, the case where each slave unit is connected by a route that does not branch is shown, but the present invention is not limited to this. The same detection as in each of the above embodiments can be performed on the communication network having the upstream and downstream relationships of each slave unit based on the branch.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

1 communication evaluation system, 2 route database, 3 transmission line database,
4 judging means, 5 rewriting means, 6 detecting means, 10 communication network.

Claims (5)

Each slave unit has an upstream / downstream relationship, and each slave unit and the most upstream slave unit and the master unit are connected to each other via a transmission path. In a communication evaluation system for a communication network
For each of the slave units, a transmission path database having transmission path data indicating use or non-use of each of the slave units and each of the transmission paths and the master unit in a communication path from the slave unit to the master unit;
A determination means for determining normality or abnormality of communication of each of the slave units in the master unit;
In the slave unit determined to be normal by the determination means, the slave units used in the transmission path data of the slave unit and the locations of the transmission paths and the master unit are normal. Rewriting means for rewriting,
A detecting means for detecting that each of the slave units and each transmission path and a location that is not normal in the master unit are abnormal from the entire transmission path data after being rewritten by the rewriting means; A communication evaluation system characterized by that. In the slave unit that is determined to be abnormal by the determination unit, the rewriting unit is normal in each slave unit and the transmission path where the transmission path data of the slave unit is unused. The communication evaluation system according to claim 1, wherein: Any one of the above slave units, in a communication evaluation system of a communication network that is relayed and communicated by any of the other slave units,
The transmission path data of the slave unit that communicates by relaying is set by using each transmission path in the communication path from the slave unit on the relay side and the slave unit on the relay side to the master unit. The communication evaluation system according to claim 1 or 2, wherein the communication evaluation system is characterized in that: 4. The communication evaluation system according to claim 3, wherein the slave unit to be relayed includes a relay database having relay data indicating which of the slave units is to be relayed. A route database having route data of one route on the upstream side in each communication of each of the slave units and each of the transmission lines;
The communication evaluation system according to any one of claims 1 to 4, wherein the transmission path data is created by extracting from the path data.

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