JP2016103730A - Radio apparatus evaluation device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily identify a radio apparatus that causes data collection failure.SOLUTION: A path quality calculation unit 16 calculates path communication quality S of each of radio paths L on the basis of radio communication state information on each radio path L used by each of radio apparatuses T collected from each radio apparatus T comprised in a radio network NW. An apparatus quality calculation unit 17 performs statistical processing of the path communication quality S of each radio path L used by the radio apparatus T per radio apparatus T and calculates apparatus communication quality Q of the radio apparatus T.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wireless communication quality evaluation technique, and more particularly to a wireless device evaluation technique for evaluating the wireless communication quality of a wireless apparatus that changes depending on the wireless environment surrounding the wireless apparatus.

  In large-scale industrial facilities such as plants and factories, field devices are installed in individual equipment, and physical quantities such as temperature, pressure, and flow rate are measured and collected as measurement data to monitor each equipment. Monitoring and controlling with In recent years, so-called wireless field devices that notify measurement data to a controller via a wireless communication path are being used as field devices. Such wireless field devices do not need to be wired with a transmission cable as compared to general field devices that use a wired transmission cable, and therefore have less restrictions on the installation location.

However, in wireless devices such as a wireless field device, a wireless base station, and a wireless relay station that constitute such a wireless network, the wireless communication quality varies greatly according to the surrounding wireless environment. For this reason, when an obstacle is newly installed between the radio base station due to a modification of the facility, or when a large vehicle temporarily stops between the radio base station and becomes an obstacle, Measurement data may not reach the controller normally.
In industrial facilities, large-scale inspections are regularly performed for the purpose of equipment maintenance. During such operations, it is necessary to remove the wireless devices and confirm that there are no abnormalities, and then re-install them. Become. For this reason, an installation location and an installation direction shift | deviate by work, antenna directivity changes, and communication quality may deteriorate as a result.

  Conventionally, as a technique for visualizing the wireless communication quality in such a wireless network, the quality of the wireless route constituting the wireless network is obtained by determining the route stability of each wireless route based on the number of transmissions and the number of non-replies between wireless devices. A technique for evaluating and displaying the output is proposed (see, for example, Patent Document 1). Thereby, it becomes possible to grasp | ascertain the radio | wireless communication quality for every radio | wireless path | route which connects between radio | wireless apparatuses very easily.

JP 2012-138830 A

  However, since such a conventional technique focuses on the state management of the wireless network, it is possible to easily grasp the wireless communication quality for each wireless path connecting the wireless devices, but there is no data collection failure. When this occurs, there is a problem that it is difficult to specify specifically which wireless device is the cause.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a wireless device evaluation technique that can easily identify a wireless device that causes a data collection failure.

  In order to achieve such an object, the wireless device evaluation apparatus according to the present invention is based on wireless communication status information about each wireless route used by the wireless device, collected from each wireless device configuring the wireless network, respectively. A route quality calculation unit that calculates a route communication quality related to the wireless route and a device communication quality related to the wireless device by statistically processing the route communication quality related to the wireless route used by the wireless device for each wireless device. And a device evaluation presentation unit for presenting device communication quality related to each wireless device as a device evaluation value related to each wireless device.

  In the configuration example of the wireless device evaluation device according to the present invention, when the device evaluation presentation unit presents the device evaluation value of each wireless device, the device evaluation presentation unit sequentially presents the device evaluation values in ascending order. It is what I did.

  Also, one configuration example of the wireless device evaluation apparatus according to the present invention is that the device quality calculation unit calculates the device communication quality based on the wireless communication status information acquired before the work on the wireless device as the device communication quality. From the communication quality, a device quality change degree indicating a degree of change to the post-work device communication quality calculated based on the wireless communication status information acquired after work on the wireless device is calculated.

  Also, one configuration example of the above-described wireless device evaluation apparatus according to the present invention is a device related to a wireless device that is a pre-registered work target when the device evaluation presentation unit presents a device evaluation value of each wireless device. Only the evaluation value is presented.

  Also, the wireless device evaluation method according to the present invention is based on the wireless communication status information regarding each wireless route used by the wireless device collected by the route quality calculation unit from each wireless device constituting the wireless network. A route quality calculating step for calculating a route communication quality related to the route, and a device quality calculating unit statistically processing the route communication quality related to each wireless route used by the wireless device for each wireless device, so that the wireless device A device quality calculation step for calculating the device communication quality for the device, and a device evaluation presentation unit for presenting the device communication quality for each wireless device as a device evaluation value for each wireless device.

  ADVANTAGE OF THE INVENTION According to this invention, the radio | wireless apparatus which becomes a cause of a data collection failure can be easily specified from each radio | wireless apparatus which comprises a radio network. For this reason, when an obstacle is newly installed between the radio base station due to a modification of the facility, or when a large vehicle temporarily stops between the radio base station and becomes an obstacle, If the wireless environment surrounding some wireless devices deteriorates, such as when the installation location or orientation of the wireless device is changed due to work such as inspection, it becomes possible to easily identify the wireless device and handle the failure And the maintenance work can be greatly simplified.

It is a block diagram which shows the structure of the radio | wireless apparatus evaluation apparatus concerning 1st Embodiment. It is a flowchart which shows the radio | wireless apparatus evaluation process concerning 1st Embodiment. It is an example of an evaluation result list output screen showing a wireless device evaluation result. It is an example of an evaluation result image output screen showing a wireless device evaluation result. It is a flowchart which shows the radio | wireless apparatus evaluation process concerning 2nd Embodiment. It is a flowchart which shows the radio | wireless apparatus evaluation process concerning 3rd Embodiment.

[Principle of the Invention]
First, the principle of the present invention will be described.
In the wireless network, RSSI (Received Signal Strength Indication) and PER (Packet Error Rate) are used as an evaluation index indicating wireless communication quality in addition to the above-described path stability. These evaluation indexes indicate the wireless communication quality related to the wireless path connecting the wireless devices.

  On the other hand, in a monitoring system used in a large-scale industrial facility such as a plant or factory, when a wireless field device is used as a field device, the wireless field device and a wireless surrounding a wireless device such as a wireless base station or a wireless relay station Depending on the situation, the wireless communication quality may change, and a failure may occur in the collection of measurement data. For this reason, the wireless path from the field wireless device to the wireless base station is multiplexed, and when a failure occurs in any of the wireless paths, switching to another wireless path enables stable collection of measurement data. Some are.

  Therefore, when the wireless device transmits measurement data through one wireless route, a data collection failure occurs by regarding the general evaluation index indicating the wireless communication quality described above as the wireless communication quality of the wireless device. Then, it is possible to specify which wireless device is the cause. However, in a wireless network in which a plurality of wireless devices are connected in a network like the above-described monitoring system, the wireless device switches and uses a plurality of wireless paths. It is difficult to identify the cause of the failure.

  The present invention pays attention to the feature that a wireless network such as such a monitoring system has a plurality of wireless devices connected in a network, and calculates an evaluation index related to each wireless device instead of an evaluation index related to each wireless path. It is what I did. In addition, paying attention to the feature that a wireless device uses a plurality of wireless paths by switching, the evaluation index related to the wireless device is calculated by statistically processing the evaluation index related to each wireless route used by the wireless device. Is.

Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, a wireless device evaluation apparatus 10 according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram illustrating the configuration of the wireless device evaluation apparatus according to the first embodiment.

  The wireless device evaluation device 10 is composed of an information processing device such as a server device or a personal computer as a whole, and is connected to the controller 20 via a communication line LN to form each wireless device T (TP, TA) constituting the wireless network NW. , TB, TC, TX, TY, TZ) is acquired from the controller 20 and has a function of evaluating the wireless communication quality related to these wireless devices T. In the following, a case where the wireless network NW is composed of a wireless network used in the monitoring system will be described as an example. However, the present invention is not limited to this, and the same applies to a wireless network in which a plurality of wireless devices are connected in a network. It is applicable.

  In the wireless network NW, wireless field devices TX, TY, TZ, wireless relay stations TA, TB, TC, and a wireless base station TP are provided as wireless devices T. TX, TY, and TZ have a function of measuring physical quantities such as temperature, pressure, and flow rate and wirelessly transmitting them as measurement data to TA, TB, and TC. TA, TB, and TC have a function of receiving measurement data wirelessly transmitted from TX, TY, and TZ, and relaying and transferring wirelessly to TP. The TP has a function of receiving measurement data wirelessly relayed and transferred from TA, TB, and TC and relaying and transferring the measurement data to the controller 20 by wire. At this time, TA, TB, and TC may have the same measurement function as TX, TY, and TZ.

Among these, TX is connected to TA and TB via communication paths LAX and LBX, TY is connected to TA and TB via communication paths LAY and LBY, and TZ is a communication path. It is connected to TB and TC via LBZ and LCZ, respectively.
TA is connected to TP and TB via communication paths LPA and LAB, and TB is connected to TP, TA and TC via communication paths LPB, LAB and LBC, respectively. And TP and TB are connected via communication paths LPC and LBC.

  The controller 20 includes a general industrial controller, and collects measurement data measured by the wireless field devices TX, TY, and TZ by performing data communication with the wireless device T via the wireless base station TP. Acquired by each wireless device T (TP, TA, TB, TC, TX, TY, TZ) by performing data communication with the wireless device T via the wireless base station TP and the function of monitoring and controlling each facility. A function of collecting the received wireless communication status information and notifying the wireless device evaluation apparatus 10 via the communication line LN.

[Radio equipment evaluation equipment]
Next, with reference to FIG. 1, the structure of the radio | wireless apparatus evaluation apparatus 10 concerning this Embodiment is demonstrated in detail.
The wireless device evaluation apparatus 10 includes, as main functional units, a communication I / F unit 11, an operation input unit 12, a screen display unit 13, a storage unit 14, a status information acquisition unit 15, a path quality calculation unit 16, and a device quality calculation. A unit 17 and a device evaluation presentation unit 18 are provided.

The communication I / F unit 11 has a function of performing data communication with various external devices such as the controller 20 via the communication line LN.
The operation input unit 12 includes an operation input device such as a keyboard, a mouse, and a touch panel, and has a function of detecting an operator's operation.

The screen display unit 13 includes a screen display device such as an LCD, and has a function of displaying the evaluation result output from the device evaluation presentation unit 18 on the screen.
The storage unit 14 includes a storage device such as a hard disk and a semiconductor memory, and has a function of storing various processing information and programs used for wireless device evaluation processing.

  The status information acquisition unit 15 sends, from the controller 20 via the communication I / F unit 11 and the communication line LN, the radio communication status regarding all radio paths used by the radio device T for each radio device T configuring the radio network NW. It has a function to acquire information. In the present embodiment, the wireless communication status information indicates the number of transmissions NT in two directions between two wireless devices T that wirelessly communicate via the wireless route, and the number of responses that have not been made for this transmission. No reply number NE is acquired.

The route quality calculation unit 16 has a function of calculating the route communication quality S related to each wireless route L based on the wireless communication status information acquired by the status information acquisition unit 15.
When the number of transmissions and no reply for a certain wireless route L are NT and NE, respectively, the route communication quality S for the wireless route L is obtained by S = 1−NE / NT. This S is based on the ratio of NE to NT, and indicates the stability of the wireless path L, that is, the path stability. Instead of the non-reply number NE, the reply number NA may be acquired and S = NA / NT. The route communication quality S is not limited to the route stability, and other evaluation indexes such as RSSI and PER may be used.

The device quality calculation unit 17 has a function of calculating the device communication quality Q related to the wireless device T by statistically processing the route communication quality S related to each wireless route L used by the wireless device T for each wireless device T. Have.
When the weighted average is used as the statistical processing, when the number of wireless routes Li used by a certain wireless device T is n and the route communication quality related to these wireless routes Li is Si, the device communication quality Q related to the wireless device T is Q = ΣSi / n.

  In addition to the weighted average, the device communication quality Q may be a representative value of the route communication quality S obtained by statistical processing, such as a maximum value, a minimum value, or a median value. Further, the wireless route L used by each wireless device T may be specified based on the network configuration information of the wireless network NW registered in advance in the controller 20.

The device evaluation presentation unit 18 has a function of sorting the device communication quality Q calculated by the device quality calculation unit 17 in ascending order, and displays the device communication quality Q as a device evaluation value for each wireless device T in the order of the sorting result. The function presented from the unit 13 is provided.
The larger the value of the device communication quality Q, the better the communication quality. Therefore, when the device communication quality Q is sorted in ascending order, the device communication quality Q is displayed in order from the wireless device T having the lowest device communication quality Q. . As a result, the wireless device T that causes the data collection failure is preferentially displayed.

  Among these functional units, the status information acquisition unit 15, the route quality calculation unit 16, the device quality calculation unit 17, and the device evaluation presentation unit 18 are realized by an arithmetic processing unit in which a CPU executes a program in the storage unit 14. The The program is stored in advance in the storage unit 14 from an external device or a recording medium via the communication I / F unit 11.

[Operation of First Embodiment]
Next, with reference to FIG. 2, operation | movement of the radio | wireless apparatus evaluation apparatus 10 concerning this Embodiment is demonstrated. FIG. 2 is a flowchart of the wireless device evaluation process according to the first embodiment.
The wireless device evaluation apparatus 10 executes the wireless device evaluation process of FIG. 2 according to the wireless device evaluation instruction detected by the operation input unit 12.

  First, the status information acquisition unit 15 relates from the controller 20 via the communication I / F unit 11 and the communication line LN to all the wireless paths L used by the wireless device T for each wireless device T configuring the wireless network NW. As the wireless communication status information, the transmission number NT and the non-reply number NE are acquired (step 100).

Subsequently, the route quality calculation unit 16 calculates the route communication quality S related to each wireless route L based on the wireless communication status information acquired by the status information acquisition unit 15 (step 101).
Thus, for example, in the example of the wireless network NW of FIG. 1, the path communication quality SAX, SAY, SBX, SBY for each of the wireless paths LAX, LAY, LBX, LBY, LBZ, LCZ, LAB, LBC, LPA, LPB, LPC. , SBZ, SCZ, SAB, SBC, SPA, SPB, SPC are calculated.

Next, the device quality calculation unit 17 calculates, for each wireless device T, the device communication quality Q related to the wireless device T by statistically processing the route communication quality S related to each wireless route L used by the wireless device T. (Step 102).
Thereby, for example, in the wireless network NW example of FIG. 1, since the field wireless device TX switches and uses LAX and LBX as the wireless route, the device communication quality QX becomes the route communication quality SAX and SBX of these LAX and LBX. Based on this, QX = (SAX + SBX) / 2. Further, the device communication quality QA of the radio relay station TA is obtained by QA = (SAX + SAY + SAB + SPA) / 4, and the device communication quality QP of the radio base station TP is obtained by QP = (SPA + SPB + SPC) / 3.

  Thereafter, the device evaluation presentation unit 18 sorts the device communication quality Q calculated by the device quality calculation unit 17 in ascending order (step 103), and sorts the device communication quality Q in the order of the sorting result into the device evaluation for each wireless device T. A value is presented from the screen display unit 13 (step 104), and the series of wireless device evaluation processing is terminated.

  FIG. 3 is an example of an evaluation result list output screen showing wireless device evaluation results. Here, the names of wireless devices and their device communication qualities are displayed and output in list format in ascending order of device communication quality Q. Thereby, it is possible to easily identify the wireless device T that causes a data collection failure. Note that the device communication quality Q that may cause a data collection failure obtained empirically is set in advance as a threshold value, and the device communication quality Q that is equal to or lower than this threshold value is displayed on the evaluation result list output screen with the color / You may make it display by highlighting with a pattern, a thick line, etc., or selecting and displaying. Therefore, it is possible to very easily identify the wireless device T that causes a data collection failure.

  FIG. 4 is an example of an evaluation result image output screen showing a wireless device evaluation result. Here, the network configuration of the wireless network NW is displayed with the symbols of the wireless device T and the wireless route L, and the device communication quality Q related to the wireless device T and its ascending order are displayed in the vicinity of the symbol indicating each wireless device T. Is displayed. Also in this case, as described above, the device communication quality Q below the threshold value and the ascending order thereof are displayed highlighted on the evaluation result image output screen with colors, symbols, bold lines, etc., or selected and displayed. It may be. Therefore, it is possible to very easily identify the wireless device T that causes a data collection failure.

[Effect of the first embodiment]
As described above, the present embodiment is based on the wireless communication status information regarding each wireless route L used by the wireless device T collected by the route quality calculation unit 16 from each wireless device T configuring the wireless network NW. By calculating the route communication quality S related to each wireless route L, the device quality calculation unit 17 statistically processes the route communication quality S related to each wireless route L used by the wireless device T for each wireless device T. The device communication quality Q related to the wireless device T is calculated.

Thereby, the device communication quality Q related to the wireless device T focused on the wireless device T is calculated from the route communication quality S related to each wireless route L used by the wireless device T focused on the wireless route L. Therefore, it is possible to easily identify the wireless device T that causes the data collection failure from among the wireless devices T configuring the wireless network NW.
For this reason, when an obstacle is newly installed between the radio base station due to a modification of the facility, or when a large vehicle temporarily stops between the radio base station and becomes an obstacle, If the wireless environment surrounding some wireless devices deteriorates, such as when the installation location or orientation of the wireless device is changed due to work such as inspection, it becomes possible to easily identify the wireless device and handle the failure And the maintenance work can be greatly simplified.

[Second Embodiment]
Next, a wireless device evaluation apparatus 10 according to the second embodiment of the present invention will be described.
In the first embodiment, the case has been described in which the device communication quality Q related to each wireless device T configuring the wireless network NW is quantified and compared with each other. Here, not all of these wireless devices T can be installed in a fair wireless environment, and there are cases where they must be installed in a wireless environment inferior to others. Therefore, in such a case, even if the device communication quality Q is quantified and compared and evaluated, for example, the wireless device T having the reduced device communication quality Q before and after work such as inspection of the wireless device T is correctly identified. I can't.

  This embodiment pays attention to the reduction of the device communication quality Q before and after the work such as the inspection of the wireless device T, and the devices of the pre-work device communication quality Q before the work and the device communication quality Q after the work. The degree of quality change is calculated, and this degree of device quality change is presented as a device evaluation value for each wireless device T.

In other words, in the present embodiment, the device quality calculation unit 17 uses the pre-operation device communication quality Qp calculated based on the wireless communication status information acquired before the operation for the wireless device T as the device communication quality Q for the wireless device T. It has a function of calculating a device quality change degree indicating a degree of change to the post-work device communication quality Qa calculated based on the wireless communication status information acquired after the work.
Other configurations in the wireless device evaluation apparatus 10 according to the present embodiment are the same as those in the first embodiment, and a detailed description thereof is omitted here.

[Operation of Second Embodiment]
Next, with reference to FIG. 5, operation | movement of the radio | wireless apparatus evaluation apparatus 10 concerning this Embodiment is demonstrated. FIG. 5 is a flowchart illustrating a wireless device evaluation process according to the second embodiment.

  The wireless device evaluation apparatus 10 executes the wireless device evaluation process of FIG. 5 according to the wireless device evaluation instruction detected by the operation input unit 12. In executing this wireless device evaluation process, the steps 100 to 102 in FIG. 2 described above are executed before and after the inspection of each wireless device T, and the pre-operation device communication quality Qp of each wireless device T and It is assumed that the post-operation device communication quality Qa is calculated and stored in the storage unit 14.

First, the device quality calculation unit 17 acquires the pre-operation device communication quality Qp and the post-operation device communication quality Qa related to each wireless device T from the storage unit 14 (step 200), and the pre-operation device communication for each wireless device T. A device quality change degree indicating the degree of change from the quality Qp to the post-work device communication quality Qa is calculated as the device communication quality Q of the wireless device T (step 201).
When the device communication quality before work and the device communication quality after work of a certain wireless device T are Qp and Qa, respectively, the device communication quality Q of the wireless device T is obtained by Q = Qa / Qp. Therefore, when the wireless environment deteriorates after the work and the communication quality decreases, the device communication quality Q shows a value smaller than 1. When the wireless environment improves after the work and the communication quality improves, the device communication quality Q is 1 Indicates a larger value.

  Thereafter, the device evaluation presentation unit 18 sorts the device communication quality Q calculated by the device quality calculation unit 17 in ascending order (step 202), and sorts the device communication quality Q into the device evaluation related to each wireless device T in the order of the sorting result. A value is presented from the screen display unit 13 (step 203), and a series of wireless device evaluation processing ends.

[Effect of the second embodiment]
As described above, according to the present embodiment, the device quality calculation unit 17 determines the wireless device from the pre-operation device communication quality Qp calculated based on the wireless communication status information acquired before the operation for the wireless device T as the device communication quality Q. The device quality change degree indicating the degree of change to the post-work device communication quality Qa calculated based on the wireless communication status information acquired after work for T is calculated.

  Thereby, the degree of change in device communication quality before and after work such as inspection for each wireless device T is calculated as device communication quality Q. Therefore, even when there is a wireless device T that must be installed in a wireless environment inferior to the others, the wireless device T that causes a data collection failure caused by work such as inspection must be accurately identified. Can do.

[Third Embodiment]
Next, a wireless device evaluation apparatus 10 according to the third embodiment of the present invention will be described.
In the first and second embodiments, the case where all the wireless devices T configuring the wireless network NW are evaluated is described as an example. Here, work such as inspections for the wireless devices T is almost all of the wireless devices T but not all of them, so that only the wireless devices T that are the objects of evaluation may be used. Further, even if the device communication quality Q of the wireless device T other than the work target is reduced, this is an influence from the work target wireless device T, and it is not the work target for the data collection failure that occurs after the work. It should not be supported by the wireless device T.

The present embodiment is a work target by paying attention to the relationship between the wireless device T that is a work target for such an inspection and the wireless device T that is a target for handling a data collection failure that occurs after the work. A device evaluation value is presented only for the wireless device T.
In other words, in the present embodiment, the device evaluation presentation unit 18 has a function of presenting only the device evaluation value related to the wireless device T to be registered in advance when the device evaluation value of each wireless device T is presented. Have.

[Operation of Third Embodiment]
Next, with reference to FIG. 6, operation | movement of the radio | wireless apparatus evaluation apparatus 10 concerning this Embodiment is demonstrated. FIG. 6 is a flowchart illustrating wireless device evaluation processing according to the third embodiment.
The wireless device evaluation apparatus 10 executes the wireless device evaluation process of FIG. 6 according to the wireless device evaluation instruction detected by the operation input unit 12. It is assumed that a work target wireless device list indicating the wireless device T that is a work target such as inspection is registered in the storage unit 14 in advance.

  First, the status information acquisition unit 15 relates from the controller 20 via the communication I / F unit 11 and the communication line LN to all the wireless paths L used by the wireless device T for each wireless device T configuring the wireless network NW. As the wireless communication status information, the transmission number NT and the non-reply number NE are acquired (step 300).

Subsequently, the route quality calculation unit 16 calculates the route communication quality S related to each wireless route L based on the wireless communication status information acquired by the status information acquisition unit 15 (step 301).
Next, the device quality calculation unit 17 calculates, for each wireless device T, the device communication quality Q related to the wireless device T by statistically processing the route communication quality S related to each wireless route L used by the wireless device T. (Step 302).

  Thereafter, the device evaluation presentation unit 18 sorts the device communication quality Q calculated by the device quality calculation unit 17 in ascending order (step 303), and based on the work target wireless device list acquired from the storage unit 14, these device communication qualities. The device communication quality Q of the work target wireless device T is selected from Q (step 304), and the selected device communication quality Q is presented from the screen display unit 13 as a device evaluation value for each wireless device T in the order of the sort result. (Step 305), a series of wireless device evaluation processing is terminated.

[Effect of the third embodiment]
As described above, in the present embodiment, when the device evaluation presentation unit 18 presents the device evaluation value of each wireless device T, it presents only the device evaluation value related to the wireless device T to be registered in advance. It is what I did.
Thereby, only the device evaluation value related to the wireless device T to be worked is selected and presented from all the wireless devices T configuring the wireless network NW. Therefore, the device evaluation value related to the wireless device T other than the work target is not presented, and the wireless device T that causes the data collection failure caused by the work such as inspection can be appropriately identified.

  Further, in the present embodiment, as an example of selecting only the device evaluation value related to the wireless device T that is a work target, the device communication quality Q calculated by the device quality calculation unit 17 is selected after sorting in ascending order. Although described, the selection timing is not limited to this, and a device evaluation value related to the wireless device T that is a work target may be selected before sorting. Further, when the device quality calculation unit 17 calculates the device communication quality Q of each wireless device T, only the device communication quality Q related to the wireless device T that is the work target may be calculated.

  In the present embodiment, the case where the present invention is applied to the first embodiment has been described as an example. However, the present embodiment is not limited to this and may be applied to the second embodiment. In this case, the device quality change degree related to the wireless device T to be registered in advance is presented as the device communication quality Q. For this reason, it is possible to accurately and appropriately specify the wireless device T that causes a data collection failure caused by work such as inspection, which is extremely useful in actual maintenance work.

[Extended embodiment]
The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. In addition, each embodiment can be implemented in any combination within a consistent range.

  DESCRIPTION OF SYMBOLS 10 ... Wireless apparatus evaluation apparatus, 11 ... Communication I / F part, 12 ... Operation input part, 13 ... Screen display part, 14 ... Memory | storage part, 15 ... Status information acquisition part, 16 ... Path | route quality calculation part, 17 ... Equipment quality Calculation unit, 18 ... device evaluation presentation unit, 20 ... controller, LN ... communication line, T ... wireless device, L ... wireless route, NW ... wireless network.

Claims (5)

A route quality calculation unit that calculates the route communication quality for each wireless route based on the wireless communication status information for each wireless route used by the wireless device collected from each wireless device constituting the wireless network;
For each wireless device, a device quality calculation unit that calculates device communication quality related to the wireless device by statistically processing the route communication quality related to each wireless route used by the wireless device;
A device evaluation presentation unit that presents device communication quality related to each wireless device as a device evaluation value related to each wireless device. The wireless device evaluation apparatus according to claim 1,
The device evaluation presentation unit, when presenting device evaluation values of the respective wireless devices, presents the device evaluation values in order from the lowest device evaluation value. In the radio equipment evaluation apparatus according to claim 1 or 2,
The device quality calculation unit converts, as the device communication quality, from the pre-operation device communication quality calculated based on the wireless communication state information acquired before work on the wireless device to the wireless communication state information acquired after operation on the wireless device. A wireless device evaluation apparatus that calculates a device quality change degree indicating a degree of change in post-work device communication quality calculated based on the device. In the radio equipment evaluation apparatus according to any one of claims 1 to 3,
The device evaluation presentation unit presents only a device evaluation value related to a wireless device to be registered in advance when presenting a device evaluation value of each wireless device. A route quality calculation step in which the route quality calculation unit calculates the route communication quality related to each wireless route based on the wireless communication status information related to each wireless route used by the wireless device collected from each wireless device constituting the wireless network. When,
A device quality calculating step for calculating a device communication quality related to the wireless device by statistically processing a route communication quality related to each wireless route used by the wireless device for each wireless device;
A device evaluation presenting method, comprising: a device evaluation presenting step in which a device evaluation presenting unit presents device communication quality related to each wireless device as a device evaluation value related to each wireless device.

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