JP7099716B2 - Specific device, specific method, and program - Google Patents

Description

The present invention relates to a specific device, a specific method, and a program.

Equipment (also referred to as communication equipment) such as air conditioners or lighting equipment equipped with wireless communication modules is used. Multiple communication devices of the same type may be fixedly installed and used in a relatively large space.

When multiple communication devices are installed as described above, although multiple positions where multiple communication devices should be installed are predetermined, each individual communication device is installed in any of the multiple positions. It may not be specified.

There is a technique for determining the distance from one device by focusing on one device while associating the layout of the space with the device on a map. In this technique, when the distance to the other devices is determined, individual information is input to each device (see Patent Document 1).

Japanese Patent No. 4974378

As described above, when any of the plurality of communication devices is installed in any of the plurality of predetermined positions, which communication device is installed in which position, that is, the communication device and its The relationship with the installation position may be unknown. In such a case, there is a problem that it is difficult to identify which position among the plurality of positions the individual of the plurality of communication devices is installed.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a specific device for specifying which position among a plurality of positions the communication device is installed.

In order to solve the above problems, the specific device according to one aspect of the present invention acquires an index obtained by referring to wireless communication between a plurality of communication devices, and uses the acquired index to obtain the index. A first generation unit that generates first rank information regarding the distances of a plurality of communication devices, and a plurality of positions in the space having the same number as the plurality of communication devices, and each of the plurality of communication devices is in any of the plurality of positions. A second generation unit that acquires map information indicating a plurality of locations installed in the room and generates second-rank information regarding the distances of the plurality of communication devices from the map information, the first-rank information, and the first-order. (Ii) By collating with the ranking information, it is provided with a specific unit for specifying an installation position in which at least one communication device of the plurality of communication devices is installed among the plurality of positions.

According to this, the specific device determines the ranking of the distances between the plurality of communication devices derived from the index obtained by the actual wireless communication and the ranking of the distances between the plurality of communication devices on the map. By collating, the installation position of the communication device can be specified. It is generally known that the radio wave received by a communication device from another communication device decreases as the distance between these communication devices increases. However, in an actual environment such as an office or factory, radio waves on walls or ceilings are reflected or absorbed, so that the received signal strength does not always decrease simply according to the distance. Therefore, by using the order of distances between communication devices as described above, the specific device receives from a plurality of communication devices even in a situation where the relationship between the received signal strength and the distance is not exactly known. If the order of signal strength is known, the position of the communication device can be specified. In this way, the specific device can specify which of the plurality of positions the communication device is installed.

Further, the first generation unit acquires the index obtained by wireless communication between the first device among the plurality of communication devices and the communication device other than the first device among the plurality of communication devices. Using the acquired index, the first rank information including the identification information of the second device, which is a communication device presumed to be installed at the position closest to the first device among the plurality of communication devices, is obtained. The second generation unit generates the second ranking information including the identification information of the communication device installed at the position closest to the first device in the map information, and the specific unit generates the second order information. By collating the first-rank information with the second-rank information, the position of the communication device installed closest to the first device in the map information is specified as the installation position of the second device. You may.

According to this, the specific device can specify the position of the communication device closest to the communication device whose position is known among the plurality of communication devices. Therefore, the specific device can more easily specify which position of the plurality of positions the communication device is installed.

Further, the first generation unit generates the second device whose installation position is specified by the specific unit as the new first device, and the identification information of the new second device as the first order information, and the first generation unit. (Ii) The generation unit generates new second ranking information by using the second device whose installation position has been specified by the specific unit as a new first device, and the specific unit has specified the installation position by the specific unit. With the second device as a new first device, the installation position of the new second device is specified, the first generation unit generates the first ranking information, and the second generation unit generates the second ranking information. The installation positions of all of the plurality of communication devices may be sequentially specified by repeating the generation of the above and the specification of the installation position of the new second device by the specific unit.

According to this, the specific device identifies the positions of all the plurality of communication devices by repeatedly specifying the positions of the communication devices closest to the communication devices whose positions are known among the plurality of communication devices. Can be done. In this way, the specific device can specify at which position among the plurality of positions the communication device is installed for all of the plurality of communication devices.

Further, the first generation unit acquires a plurality of characteristic values indicating the characteristics of wireless communication between the plurality of communication devices, and uses the deviation of the acquired plurality of the characteristic values for each of the plurality of communication devices as the index. The communication device that has been acquired and has the smallest deviation for each communication device may be specified as the second device, and the identification information of the specified second device may be generated as the first order information.

According to this, when specifying the position of the communication device closest to the communication device whose position is known among a plurality of communication devices, the specific device uses the deviation of the characteristic value of the wireless communication to process the process. Will be easier. The specific device can more easily specify which of the plurality of positions the communication device is installed.

Further, the first generation unit acquires a plurality of characteristic values indicating the characteristics of wireless communication between the plurality of communication devices, and the smaller the characteristic values, the higher the communication quality, and the acquired plurality of acquired characteristics values. The average of the characteristic values for each of the plurality of communication devices is acquired, the communication device having the smallest average for each communication device is specified as the second device, and the identified identification information of the second device is used as the second device. It may be generated as first rank information.

According to this, when specifying the position of the communication device closest to the communication device whose position is known among a plurality of communication devices, the specific device uses the average of the characteristic values of wireless communication to process the process. Will be easier. The specific device can more easily specify which of the plurality of positions the communication device is installed.

Further, the first generation unit acquires a plurality of characteristic values indicating the characteristics of wireless communication between the plurality of communication devices, and is installed at a position closest to the first device using the acquired plurality of the characteristic values. The communication device most frequently specified as the communication device may be specified as the second device, and the identification information of the specified second device may be generated as the first order information.

According to this, when the specific device identifies the position of the communication device closest to the communication device whose position is known among a plurality of communication devices, the number of times that the specific device is specified as the closest communication device in the past is the most. Identifying a large number of communication devices makes the process easier. The specific device can more easily specify which of the plurality of positions the communication device is installed.

Further, the characteristic value may include a received signal strength, an error rate, a transmission rate, or a round-trip time of a communication link of wireless communication.

According to this, the specific device uses the received signal strength, the error rate, the transmission rate, or the round-trip time of the communication link of the wireless communication as the characteristic value, and more easily, the communication device at any of the plurality of positions. Can be identified if is installed.

Further, the first generation unit acquires an index obtained by wireless communication of each of the plurality of communication devices, and uses the acquired index to obtain the first order including the order of the distance between the plurality of communication devices. The second generation unit includes information, and the second generation unit includes the order of the distances between the plurality of communication devices for each of the plurality of patterns in which the plurality of communication devices can be installed at the plurality of positions in the map information. The second-rank information may be generated, and the specific unit may specify the installation positions of all the plurality of communication devices by collating the first-rank information with the second-rank information.

According to this, the specific device selects one that matches the characteristic value of actual wireless communication from a plurality of patterns in which a plurality of communication devices can be installed at a plurality of positions. Therefore, the specific device can more easily specify which position of the plurality of positions the communication device is installed.

In order to solve the above problems, the specific method according to one aspect of the present invention acquires an index obtained by referring to wireless communication between a plurality of communication devices, and uses the acquired index to obtain the index. The first generation step of generating the first rank information regarding the distances of the plurality of communication devices, and the plurality of positions in the space having the same number as the plurality of communication devices, and each of the plurality of communication devices is in any of the plurality of positions. A second generation step of acquiring map information indicating a plurality of locations installed in a wireless device and generating second rank information regarding the distances of the plurality of communication devices from the map information, the first rank information, and the first rank information. (Ii) Includes a specific step of specifying an installation position in which at least one communication device of the plurality of communication devices is installed among the plurality of positions by collating with the ranking information.

According to this, the same effect as that of the above-mentioned specific device is obtained.

In order to solve the above problems, the program according to one aspect of the present invention is a program for causing a computer to execute the above-mentioned specific method.

According to this, the same effect as that of the above-mentioned communication terminal is obtained.

It should be noted that the present invention can be realized not only as a device, but also as a method in which the processing means constituting the device is used as a step, as a program for causing a computer to execute those steps, or as a computer reading in which the program is recorded. It can also be realized as a possible recording medium such as a CD-ROM, or as information, data or a signal indicating the program. The programs, information, data and signals may be distributed via a communication network such as the Internet.

According to the present invention, the specific device can specify which of the plurality of positions the communication device is installed.

FIG. 1 is an explanatory diagram schematically showing an example of a map showing a space according to the first embodiment. FIG. 2 is an explanatory diagram showing the configuration of the specific device according to the first embodiment. FIG. 3 is an explanatory diagram showing an example of log information according to the first embodiment. FIG. 4 is an explanatory diagram showing RSSI and ranking information of received radio waves for each communication device according to the first embodiment. FIG. 5 is an explanatory diagram showing ranking information obtained from the map information of the communication device according to the first embodiment. FIG. 6 is an explanatory diagram showing the standard deviation of RSSI and ranking information for each communication device according to the first embodiment. FIG. 7 is an explanatory diagram showing an average of RSSI and ranking information for each communication device according to the first embodiment. FIG. 8 is an explanatory diagram showing the number of first place acquisitions for each communication device according to the first embodiment. FIG. 9 is a flow chart showing the processing of the specific device according to the first embodiment. FIG. 10 is an explanatory diagram showing information regarding the position of the communication device according to the second embodiment and the order of the distance of the communication device. FIG. 11 is an explanatory diagram showing RSSI and ranking information of received radio waves for each communication device according to the second embodiment and identification of the position of the communication device. FIG. 12 is a flow chart showing the processing of the specific device according to the second embodiment.

Hereinafter, embodiments will be specifically described with reference to the drawings.

Each of the embodiments described below shows a preferred specific example of the present invention. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, the order of steps, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Further, among the components in the following embodiments, the components not described in the independent claims showing the highest concept of the present invention will be described as arbitrary components constituting the more preferable form. The same components may be designated by the same reference numerals and description thereof may be omitted.

(Embodiment 1)
In the present embodiment, a specific device for specifying which position among a plurality of positions the communication device is installed will be described.

FIG. 1 is an explanatory diagram schematically showing an example of a map showing a space according to the present embodiment. The map shown in FIG. 1 is a map showing the positions or floor plans of walls, rooms, stairs, etc. in an office, for example. The map shown in FIG. 1 is an example of map information. The map information does not necessarily have to be illustrated as shown in FIG. 1, and may be a set of coordinate information indicating the position of a wall or the like in the office.

The map shown in FIG. 1 shows five communication devices A, B, C, D and E (also referred to as communication device A and the like). The installation positions of the communication devices A, B, C, D and E are defined as positions P, Q, R, S and T (also referred to as position P and the like).

Further, FIG. 1 also shows an example of the distance between the communication devices A and the like. For example, the distance between the communication devices AB is 17 m, the distance between the communication devices BC is 22 m, and the distance between the communication devices CA is 15 m.

The communication device A or the like is a device having a communication function, and may be a device such as a radio base station (also referred to as an access point), a wireless communication terminal, an air conditioner, or a lighting device. In principle, communication equipment is fixedly installed on a building material such as a wall or ceiling, and is not supposed to be carried by a person in the installed state.

It is assumed that when the communication device A or the like is installed, it is only specified that the five communication devices are installed at any of the five installation positions. That is, it is assumed that the specific communication device and the specific position are not associated with each other.

Specifically, when the communication device A or the like is installed, it is assumed that the position where the communication device A should be installed is one of the positions P and the like. In such a situation, it is assumed that the communication device A is installed at the position P among the plurality of positions P and the like. Similarly, it is assumed that the position where the communication device B should be installed is one of the positions P and the like, and the communication device B is installed at the position Q among them. The same applies to the communication devices C, D and E.

The specific device 10 according to the present embodiment is connected to, for example, one of the communication devices A and the like, and is an individual communication device (for example, the communication device A) based on the information acquired from the communication device A and the like. However, the purpose is to identify which of the multiple positions is installed. The specific device 10 does not necessarily have to be arranged at the position shown on the map, and may be located at any position as long as it is connected to the communication device A or the like.

If it is possible to identify the position where the communication device is installed, for example, if the communication device is malfunctioning or malfunctions, the area around the communication device should be investigated, repaired or replaced. It will be easier to do.

The specific device 10 is a device that communicates with a communication device A or the like and appropriately acquires information (for example, radio wave strength, transmission rate, etc.) that the communication devices A or the like can know by mutual wireless communication. For example, the specific device 10 is a mobile terminal (tablet, smartphone, etc.), a notebook PC (Personal Computer), or the like.

The number of communication devices A and the like is not limited to 5, and may be a plurality. Further, the communication device A or the like may be, for example, an MP (mesh point), a MAP (mesh access point), or the like that constitutes a mesh network conforming to the IEEE802.11s standard.

FIG. 2 is an explanatory diagram showing the configuration of the specific device 10 according to the present embodiment.

As shown in FIG. 2, the specific device 10 includes a first generation unit 11, a second generation unit 12, and a specific unit 13. Each functional unit included in the specific device 10 can be realized by the CPU (not shown) included in the specific device 10 executing a predetermined program using the memory (not shown).

The first generation unit 11 acquires an index obtained by referring to each wireless communication of the plurality of communication devices A and the like, and uses the acquired index to rank information (first rank) regarding the distance of the plurality of communication devices A and the like. It is a processing unit that generates information).

Here, the ranking information is information indicating the ranking of the distances between the plurality of communication devices A and the like. For example, the ranking information is information indicating the ranking when the distance between the communication devices A and B, the distance between the communication devices A and C, the distance between the communication devices A and D, and the like are ordered. Further, the ranking information may be information for specifying the shortest distance among the above distances.

The second generation unit 12 is a plurality of positions P and the like having the same number as the plurality of communication devices A and the like in the space, and each of the plurality of communication devices A and the like is installed at any of the plurality of positions P and the like. It is a processing unit that acquires map information indicating a position P or the like and generates ranking information (also referred to as second ranking information) regarding distances of a plurality of communication devices A or the like from the map information.

By collating the first rank information and the second rank information, the specific unit 13 specifies an installation position in which at least one communication device such as a plurality of communication devices A is installed among the plurality of positions P and the like. It is a processing unit.

An example of more specific processing of the method of specifying the installation position of the communication device by the specific device 10 will be described below. In addition, another example will be described in the embodiment described later.

For example, the first generation unit 11 acquires an index obtained by wireless communication between the first device among the plurality of communication devices A and the like and the communication device other than the first device among the plurality of communication devices A and the like. Using the acquired index, the first rank information including the identification information of the second device, which is the communication device installed at the position closest to the first device among the plurality of communication devices A and the like, is generated.

Further, the second generation unit 12 generates the second rank information including the identification information of the communication device installed at the position closest to the first device in the map information. Here, it is assumed that the position of the first device on the map is known.

Then, the specifying unit 13 collates the first-rank information with the second-rank information to change the position of the communication device installed closest to the first device in the map information to the installation position of the second device. Specify as. As a result, the specifying unit 13 can specify the installation position of one of the plurality of communication devices.

Further, the first generation unit 11 generates the second device whose installation position is specified by the specific unit 13 as the new first device, and the identification information of the new second device as the first order information. The second generation unit 12 generates new second ranking information by using the second device whose installation position is specified by the specific unit 13 as a new first device. The specific unit 13 specifies the installation position of the new second device by using the second device whose installation position is specified by the specific unit 13 as the new first device. Then, the first generation unit 11 generates the first rank information, the second generation unit 12 generates the second rank information, and the specific unit 13 repeatedly specifies the installation position of the new second device. The device 10 sequentially specifies the installation positions of all the plurality of communication devices. As a result, the specifying unit 13 can specify the installation positions of all the plurality of communication devices.

Here, a method of specifying the installation positions of a plurality of communication devices A and the like will be specifically described by taking the case where the first device is the communication device A as an example.

The first generation unit 11 includes the identification information of the communication device C as the identification information of the second device by using the index obtained by the wireless communication between the communication device A as the first device and the communication devices B to E respectively. Generate first rank information.

The second generation unit 12 generates the second rank information including the identification information of the communication device installed at the position R, which is the position closest to the communication device A as the first device in the map information. Then, the specifying unit 13 identifies the position R in the map information as the installation position of the communication device C by collating the first order information and the second order information, in other words, the communication device C is installed at the position R. Identify that it has been.

Further, after that, the specifying device 10 focuses on the communication device A or the communication device C whose installation position is known, and identifies the communication device closest to the communication device A or C and its installation position. By repeating this process, the specifying device 10 can specify all the installation positions of the communication device A and the like.

Hereinafter, the information used by the specific device 10 for processing will be described.

FIG. 3 is an explanatory diagram showing an example of log information according to the present embodiment. The log information shown in FIG. 3 is an example of a log of wireless communication between the communication device A and the communication devices B to E generated by the communication device A.

In the log information shown in FIG. 3, one entry (that is, one line) is generated for each communication frame (also simply referred to as “frame”) received by the communication device A by wireless communication. One entry of log information includes time, source MAC address, destination MAC address, transmission rate, and RSSI (Received Signal Strength Indicator, received signal strength) information. The log information may include other information as described above.

The time is information indicating the time when the frame related to the entry is received. The time may be expressed as a relative time starting from the first frame of the log information, or may be expressed as an absolute time.

The source MAC address is information indicating the source address of the frame related to the entry.

The destination MAC address is information indicating the destination address of the frame related to the entry.

The transmission rate is information indicating the transmission rate of the frame related to the entry.

RSSI is information indicating the received signal strength of the frame related to the entry.

For example, the first entry included in the log information shown in FIG. 3 is a log relating to reception of a frame whose source MAC address is MAC (B) and whose destination MAC address is MAC (A). The frame is transmitted at a transmission rate of 54 Mbps and is shown to have an RSSI of -48 at the time of reception. Here, "MAC (A)" means the MAC address of the communication device A. The same applies to other communication devices.

The first generation unit 11 of the specific device 10 receives the log information shown in FIG. 3 from the communication device A, and also receives the log information generated by each of the communication devices B to E in the same manner as described above. Then, the first generation unit 11 uses the log information received from each of the communication devices A to E to generate the first order information. The generation of the first rank information will be described with reference to FIG.

FIG. 4 is an explanatory diagram showing RSSI and ranking information of received radio waves for each communication device according to the present embodiment.

The RSSI shown in FIG. 4 is obtained by extracting the RSSI of the radio waves received from each of the communication devices B to E from the log information shown in FIG. 3, for example, by the first generation unit 11.

Further, the order shown in FIG. 4 is the order of RSSI generated by the first generation unit 11. Since RSSI generally means that the larger the value, the higher the communication quality, the first generation unit 11 estimates that the communication device C having the largest RSSI of -47 is ranked first, and the communication device C is ranked first. Generates first-order information, including identification information for.

FIG. 5 is an explanatory diagram showing ranking information obtained from the map information of the communication device according to the present embodiment.

The ranking information shown in FIG. 5 is, for example, information regarding the distance between communication devices generated by the second generation unit 12 based on the map shown in FIG.

Specifically, the ranking information shown in FIG. 5 shows the ranking of the distances from the position P to each of the positions Q to T when focusing on the position P where the communication device A is installed. It is a thing. The ranking information indicates that the position closest to the position P is the position R.

The specifying unit 13 identifies the position of the communication device by collating the ranking information shown in FIG. 4 with the ranking information shown in FIG. For example, the specifying unit 13 identifies that the communication device C estimated to be the closest to the communication device A in FIG. 4 is installed at the position R closest to the position P in FIG.

In this way, the specifying device 10 can specify at which position among the plurality of positions P and the like the communication device C is installed.

After that, the specifying device 10 focuses on the communication device A or C whose installation position is known, and identifies the communication device closest to the communication device A or C and its installation position. By repeating this process, the specifying device 10 can specify all the installation positions of the communication device A and the like.

In the above, the communication device closest to the communication device A is specified by using the RSSI of the radio wave received from the other communication device as an index, but other indexes can also be used. Other indicators include, for example, the error rate of bits or frames received from other communication devices, the transmission rate of communication links established with other communication devices, or the round-trip time of frames with other communication devices. Can be included.

As an index, a characteristic value (so-called metric value) indicating the characteristics of the communication link, more specifically, RSSI, error rate, standard deviation or average of transmission rate or round-trip time, or the number of first place acquisitions may be used. can. In addition, these indicators can be used in combination. Here, the number of times of first place acquisition is the number of times specified as a communication device installed at the position closest to the first device, in other words, a communication device that has acquired the first place in the ranking of the distance from the first device. ..

Hereinafter, the case where the standard deviation and average of RSSI and the number of first place acquisitions are used as indicators will be described as an example, but the present invention is not limited thereto.

FIG. 6 is an explanatory diagram showing the standard deviation of RSSI received by the communication device A from each of the communication devices B to E and the ranking information obtained from the log of the communication device A by the specific device according to the present embodiment. ..

The standard deviation of RSSI shown in FIG. 6 is calculated by the first generation unit 11 from the log information shown in FIG. 3, for example, the standard deviation of RSSI of the radio wave received from each of the communication devices B to E.

Further, the order shown in FIG. 6 indicates the order of the standard deviation of the RSSI generated by the first generation unit 11. Since the standard deviation of RSSI generally means that the smaller the value, the smaller the variation of RSSI, that is, the higher the communication quality, the first generation unit 11 is the communication device C in which the standard deviation of RSSI is the smallest 2.1. Is estimated to be the first rank, and the first rank information including the identification information of the communication device C is generated.

In this way, the first generation unit 11 acquires a plurality of characteristic values indicating the characteristics of wireless communication between the plurality of communication devices, and acquires the deviations of the acquired plurality of characteristic values for each of the plurality of communication devices as an index. , The communication device having the smallest deviation for each communication device may be specified as the second device, and the identification information of the specified second device may be generated as the first order information. The above-mentioned "plurality of communication devices" means, for example, four combinations of communication device A and others, that is, AB, AC, AD, and AE. This is because the specific device refers to the log information of the communication device A.

FIG. 7 is an explanatory diagram showing the average and rank information of RSSI received by the communication device A from each of the communication devices B to E obtained from the log of the communication device A by the specific device according to the present embodiment.

The average of RSSI shown in FIG. 7 is calculated by the first generation unit 11 from the log information shown in FIG. 3, for example, the average of RSSI of the radio waves received from each of the communication devices B to E.

Further, the rank shown in FIG. 7 indicates the average rank of RSSI generated by the first generation unit 11. Since the average value of RSSI generally means that the higher the value, the higher the communication quality, it is estimated that the communication device C having the largest standard deviation of RSSI of -46 is ranked first, and the identification information of the communication device C is estimated. Generates first rank information including.

Based on the order shown in FIG. 7, the first generation unit 11 can presume that the communication device installed at the position closest to the communication device A is the communication device C.

As described above, the first generation unit 11 acquires a plurality of characteristic values indicating the characteristics of wireless communication between a plurality of communication devices, and the smaller the characteristic values, the higher the communication quality. The average of the characteristic values of is acquired for each of multiple communication devices, the communication device with the smallest average for each communication device is specified as the second device, and the identification information of the specified second device is generated as the first order information. You may.

FIG. 8 is an explanatory diagram showing the number of first place acquisitions for each communication device determined by the specific device according to the present embodiment by the methods illustrated in FIGS. 4 to 6.

The number of first place acquisitions shown in FIG. 8 is a total of the number of times each of the communication devices B to E is selected as the first place in the past predetermined period.

Further, the ranking shown in FIG. 8 indicates the ranking of the number of times the first place is acquired. Since the larger the value of the number of first place acquisitions, the higher the communication quality, it is estimated that the communication device B, which has the largest number of first place acquisitions, is ranked first.

In this way, the first generation unit 11 acquires a plurality of characteristic values indicating the characteristics of wireless communication between the plurality of communication devices, and is installed at the position closest to the first device using the acquired plurality of characteristic values. The communication device most frequently specified as the communication device may be specified as the second device, and the identification information of the specified second device may be generated as the first order information.

When the ranking information is calculated using a plurality of indexes, the first generation unit 11 may determine the final ranking by adding points to the communication device that has acquired the first place in each index. The score may be predetermined for each index. In this case, the final ranking is determined by weighting and considering the ranking information calculated using a plurality of indexes.

For example, when using three indicators, the standard deviation of RSSI (see FIG. 6), the average of RSSI (see FIG. 7), and the number of first place acquisitions (see FIG. 8), the first place based on the standard deviation of RSSI. 5 points are added to the communication device C which is the first place, 5 points are added to the communication device which is the first place based on the average of RSSI, and 7 points are added to the communication device B which is the first place based on the number of times the first place is acquired. Then, the communication device C having the highest score of 10 may be defined as the communication device C closest to the communication device A.

A specific method, which is a process of the specific device 10 configured as described above, will be described.

FIG. 9 is a flow chart showing the processing of the specific device 10 according to the present embodiment.

In step S101, the specific device 10 performs a loop A start process of repeatedly executing the processes from step S102 to step S105, which will be described later. In the loop A, the processing is executed by sequentially paying attention to each of the communication devices A to E, and finally the processing is executed for all the communication devices. The communication device of interest is referred to as "the communication device".

In step S102, the first generation unit 11 acquires an index obtained by wireless communication between the communication device and another communication device.

In step S103, the first generation unit 11 estimates the communication device closest to the communication device using the index acquired in step S102, and generates ranking information including the identification information of the estimated nearest communication device.

In step S104, the second generation unit 12 identifies the communication device closest to the communication device from the map information, and generates ranking information including the identification information of the identified nearest communication device.

In step S105, the specifying unit 13 specifies the installation position of the communication device closest to the communication device. The specifying device 10 can specify the installation position where at least one communication device is installed by performing the processes from step S102 to step S105 once.

In step S106, the specific device 10 performs the end processing of the loop A. Specifically, the specific device 10 determines whether or not the processes from step S102 to step S105 have been performed for all the communication devices, and if not, the communication device that has not yet been performed. Focusing on it, control is performed so that the processes from step S102 to step S105 are performed. When the installation positions of all communication devices are specified, it is not always necessary to pay attention to all communication devices and execute the above processing, and the processing may be stopped in the middle.

Through the above series of processes, the specifying device 10 can specify at which position among the plurality of positions the plurality of communication devices are installed.

As described above, in the specific device of the present embodiment, the ranking of the distances between the plurality of communication devices derived from the index obtained by the actually performed wireless communication and the order of the distances between the plurality of communication devices on the map. The installation position of the communication device can be specified by collating with the order of the distance. It is generally known that the radio wave received by a communication device from another communication device decreases as the distance between these communication devices increases. However, in an actual environment such as an office or factory, radio waves on walls or ceilings are reflected or absorbed, so that the received signal strength does not always decrease simply according to the distance. Therefore, by using the order of distances between communication devices as described above, the specific device receives from a plurality of communication devices even in a situation where the relationship between the received signal strength and the distance is not exactly known. If the order of signal strength is known, the position of the communication device can be specified. In this way, the specific device can specify which of the plurality of positions the communication device is installed.

Further, the specific device can specify the position of the communication device closest to the communication device whose position is known among the plurality of communication devices. Therefore, the specific device can more easily specify which position of the plurality of positions the communication device is installed.

Further, the specific device can specify the positions of all the plurality of communication devices by repeatedly specifying the positions of the communication devices closest to the communication devices whose positions are known among the plurality of communication devices. In this way, the specific device can specify at which position among the plurality of positions the communication device is installed for all of the plurality of communication devices.

In addition, the specific device is easier to process by using the deviation of the characteristic value of wireless communication when specifying the position of the communication device closest to the communication device whose position is known among a plurality of communication devices. become. The specific device can more easily specify which of the plurality of positions the communication device is installed.

Further, the specific device is easier to process by using the average of the characteristic values of wireless communication when specifying the position of the communication device closest to the communication device whose position is known among a plurality of communication devices. become. The specific device can more easily specify which of the plurality of positions the communication device is installed.

In addition, the specific device is the communication device most frequently specified as the closest communication device in the past when specifying the position of the communication device closest to the communication device whose position is known among a plurality of communication devices. By identifying the above, the process becomes easier. The specific device can more easily specify which of the plurality of positions the communication device is installed.

In addition, the specific device uses the received signal strength, error rate, transmission rate, or round-trip time of wireless communication as characteristic values to more easily determine which of the multiple positions the communication device is installed in. Can be identified.

(Embodiment 2)
In the present embodiment, a mode different from that of the first embodiment will be described with respect to a specific device or the like that specifies which position of the plurality of positions the communication device is installed.

The configuration of the specific device 10 in the present embodiment is the same as that in the first embodiment. However, the processing of the first generation unit 11, the second generation unit 12, and the specific unit 13 is partially different.

That is, the first generation unit 11 acquires an index obtained by wireless communication of each of the plurality of communication devices A to E, and uses the acquired index to include the order of the distance between the plurality of communication devices A to E. Generate first rank information.

The second generation unit 12 includes a second ranking including the ranking of the distances between the plurality of communication devices A to E for each of the plurality of patterns in which the plurality of communication devices A to E can be installed at the plurality of positions in the map information. Generate information.

The specifying unit 13 specifies the installation positions of all the plurality of communication devices A to E by collating the first-rank information and the second-rank information.

FIG. 10 is an explanatory diagram showing information regarding the position of the communication device according to the present embodiment and the order of the distance of the communication device. Specifically, in FIGS. 10A, 10B, and 10C, there are a plurality of patterns generated by the second generation unit 12 in which the communication device A or the like can be installed at the plurality of positions P or the like. Three of these patterns are shown, and the ranking of the distances between communication devices in each pattern is shown. The order of the distances between the communication devices in each pattern is shown as a representative of the distances from the communication devices A to the communication devices B to E, but the distances between other communication devices may be included. There are 120 (5!) Patterns in which the communication device A or the like can be installed at the plurality of positions P or the like, and three of them are the above three patterns.

Here, when the second generation unit 12 generates ranking information for each combination of installation patterns of the plurality of communication devices A and the like, the larger the number of the communication devices A and the like installed, the larger the pattern becomes. Ranking information will be generated. Therefore, for example, the second generation unit 12 focuses on one communication device among a plurality of communication devices, and provides ranking information so as to specify the communication device closest to the communication device (ranking first). You may decide to create it. By doing so, the number of patterns in which the communication device A or the like can be installed at the plurality of positions P or the like can be minimized.

FIG. 10A shows a case where communication devices A, B, C, D and E are installed at positions P, Q, R, S and T, respectively. In this case, the ranks of the distances of the communication devices B to E from the communication device A are 2, 1, 3 and 4, respectively, and the rank information including the ranks is calculated by the second generation unit 12.

FIG. 10B shows a case where communication devices A, C, B, D and E are installed at positions P, Q, R, S and T, respectively. In this case, the ranks of the distances of the communication devices B to E from the communication device A are 1, 2, 3 and 4, respectively, and the rank information including the ranks is calculated by the second generation unit 12.

FIG. 10 (c) shows a case where communication devices A, B, D, E and C are installed at positions P, Q, R, S and T, respectively. In this case, the ranks of the distances of the communication devices B to E from the communication device A are 2, 3, 1 and 4, respectively, and the rank information including the ranks is calculated by the second generation unit 12.

FIG. 11 is an explanatory diagram showing RSSI and ranking information of received radio waves for each communication device according to the present embodiment and identification of the position of the communication device.

The RSSI and rank shown in (a) of FIG. 11 are RSSIs for radio waves from each communication device. The RSSI and the order can be generated from the log acquired by the first generation unit 11 from each communication device as in the first embodiment.

The specific unit 13 collates the order of the distances (see FIG. 10) between the communication devices generated by the second generation unit 12 with the order of (a) of FIG. 11, and extracts the matching ones. In this example, the rank shown in FIG. 11 (a) coincides with the rank shown in FIG. 10 (a). Therefore, the specifying unit 13 specifies that the installation position of the communication device A or the like is the installation position of FIG. 10A (see FIG. 11B).

FIG. 12 is a flow chart showing the processing of the specific device 10 according to the present embodiment.

As shown in FIG. 12, in step S201, the first generation unit 11 acquires an index obtained by wireless communication between the communication device and another communication device for each of the plurality of communication devices A to E.

In step S202, the first generation unit 11 uses the index acquired in step S201 for each of the plurality of communication devices A to E, and rank information indicating the order of the other communication devices and the order closer to the communication. To generate. This ranking information indicates the ranking of the distances from the other communication devices for each of the plurality of communication devices A to E derived by using the index acquired in step S201.

In step S203, the second generation unit 12 uses the map information to generate ranking information indicating the order of other communication devices, which is closer to the communication device, for each of the plurality of installation patterns. This ranking information indicates the ranking of the distances from the other communication devices for each of the plurality of communication devices A to E derived using the map information.

In step S204, the specifying unit 13 collates the ranking information generated in step S202 with the ranking information generated in step S203, and specifies the installation positions of all the plurality of communication devices.

Through the above series of processes, the specifying device 10 can specify at which position among the plurality of positions the plurality of communication devices are installed.

As described above, according to the specific device of the present embodiment, the specific device selects a plurality of patterns in which a plurality of communication devices can be installed at a plurality of positions that match the characteristic values of actual wireless communication. select. Therefore, the specific device can more easily specify which position of the plurality of positions the communication device is installed.

It should be noted that the present invention can be realized not only as a device, but also as a method in which the processing means constituting the device is used as a step, as a program for causing a computer to execute those steps, or as a computer reading in which the program is recorded. It can also be realized as a possible recording medium such as a CD-ROM, or as information, data or a signal indicating the program. The programs, information, data and signals may be distributed via a communication network such as the Internet.

Although the communication terminal and the like of the present invention have been described above based on the embodiment, the present invention is not limited to this embodiment. As long as the gist of the present invention is not deviated, various modifications that can be conceived by those skilled in the art are applied to the present embodiment, and a form constructed by combining components in different embodiments is also included in the scope of the present invention. ..

INDUSTRIAL APPLICABILITY The present invention can be used as a specific device for identifying a position among a plurality of positions where a communication device is installed.

10 Specified device 11 1st generator 12 2nd generator 13 Specified section A, B, C, D, E Communication equipment P, Q, R, S, T Position

Claims (10)

With a first generation unit that acquires an index obtained by referring to wireless communication between a plurality of communication devices and generates first-rank information regarding the distance of the plurality of communication devices using the acquired index. ,
The map information indicating a plurality of positions in the space having the same number as the plurality of communication devices and each of the plurality of communication devices installed at any of the plurality of positions is acquired, and the map information is obtained. To the second generation unit that generates the second rank information regarding the distances of the plurality of communication devices from
By collating the first rank information with the second rank information, among the plurality of positions, a specific unit for specifying an installation position where at least one communication device of the plurality of communication devices is installed can be obtained. Specific equipment to be equipped. The first generation unit
The index obtained by wireless communication between the first device among the plurality of communication devices and the communication device other than the first device among the plurality of communication devices is acquired, and the obtained index is used to obtain the index. The first rank information including the identification information of the second device, which is a communication device presumed to be installed at the position closest to the first device among the plurality of communication devices, is generated.
The second generator is
In the map information, the second rank information including the identification information of the communication device installed at the position closest to the first device is generated.
The specific part is
By collating the first rank information with the second rank information, the position of the communication device installed at the position closest to the first device in the map information is set as the installation position of the second device. The specific device according to claim 1. The first generation unit
The second device whose installation position is specified by the specific unit is used as the new first device, and the identification information of the new second device is generated as the first order information.
The second generator is
Using the second device whose installation position has been specified by the specific unit as the new first device, new second ranking information is generated.
The specific part is
The second device whose installation position has been specified by the specific unit is used as a new first device, and the installation position of the new second device is specified.
By repeating the generation of the first rank information by the first generation unit, the generation of the second rank information by the second generation unit, and the specification of the installation position of the new second device by the specific unit. The identification device according to claim 2, wherein the installation positions of all the plurality of communication devices are sequentially specified. The first generation unit
Obtaining a plurality of characteristic values indicating the characteristics of wireless communication between the plurality of communication devices,
The deviations of the acquired plurality of the characteristic values for each of the plurality of communication devices are acquired as the index.
The specific device according to claim 2 or 3, wherein the communication device having the smallest deviation for each communication device is specified as the second device, and the identification information of the specified second device is generated as the first order information. The first generation unit
A plurality of characteristic values indicating the characteristics of wireless communication between the plurality of communication devices, and the smaller the characteristic values, the higher the communication quality are acquired.
The average of the acquired plurality of the characteristic values for each of the plurality of communication devices is acquired, and the average is acquired.
The specific device according to claim 2 or 3, wherein the communication device having the smallest average for each communication device is specified as the second device, and the identification information of the specified second device is generated as the first order information. The first generation unit
Obtaining a plurality of characteristic values indicating the characteristics of wireless communication between the plurality of communication devices,
Using the acquired plurality of the characteristic values, the communication device most frequently specified as the communication device installed at the position closest to the first device is specified as the second device, and the specified second device is specified. The specific device according to any one of claims 2 to 5, which generates the identification information of the above as the first order information. The specific device according to any one of claims 4 to 6, wherein the characteristic value includes a received signal strength, an error rate, a transmission rate, or a round-trip time of a communication link of wireless communication. The first generation unit
An index obtained by wireless communication of each of the plurality of communication devices is acquired, and the acquired index is used to generate the first rank information including the rank of the distance between the plurality of communication devices.
The second generator is
In the map information, the second ranking information including the ranking of the distances between the plurality of communication devices for each of the plurality of patterns in which the plurality of communication devices can be installed at the plurality of positions is generated.
The specific part is
The specific device according to claim 1, wherein the installation positions of all the plurality of communication devices are specified by collating the first rank information with the second rank information. With the first generation step of acquiring the index obtained by referring to the wireless communication between the plurality of communication devices and generating the first rank information regarding the distance of the plurality of communication devices by using the acquired index. ,
The map information indicating a plurality of positions in the space having the same number as the plurality of communication devices and each of the plurality of communication devices installed at any of the plurality of positions is acquired, and the map information is obtained. From the second generation step of generating the second rank information regarding the distances of the plurality of communication devices,
By collating the first rank information with the second rank information, a specific step of specifying the installation position where at least one communication device of the plurality of communication devices is installed among the plurality of positions is defined. Specific methods including. A program for causing a computer to execute the specific method according to claim 9.

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