Information terminal, communicate system, display method, and program

Abstract

To provide an information terminal capable of presenting the position where a node should be added to a user.SOLUTION: An information terminal 30 includes: a display unit 32 that displays a map image in which the location information of multiple nodes that make up a wireless mesh network is visualized; and an information processing unit 34 that is configured to, when determining that there is a pair of nodes that cannot communicate among the multiple nodes based on communication area information, which indicates the communicable area of each of the multiple nodes and placement information, display the location of the additional node to be added to the wireless mesh network to realize communication between the associate node pair map the image.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an information terminal used in a communication system. [Background technology]

[0002] There is a known technology for configuring a mesh network using communication devices such as lighting fixtures that have wireless communication capabilities. Patent Document 1 discloses a technology that enables easy configuration of a mesh network in a lighting system. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-067910 Summary of the Invention [Problem to be solved by the invention]

[0004] When constructing a mesh network using multiple nodes installed in a space, it is possible that a pair of nodes that cannot communicate may arise, contrary to initial expectations. In such cases, it is common to add a new node (repeater), but there is room for consideration as to where in the space the node should be added.

[0005] The present invention provides an information terminal or the like that can present to a user the position where a node should be added. [Means for solving the problem]

[0006] An information terminal according to one aspect of the present invention comprises a display unit that displays a map image visualizing placement information showing the placement of multiple nodes that constitute a wireless mesh network, communication area information showing the communication area of ​​each of the multiple nodes, and an information processing unit that, if it is determined based on the placement information that there is a pair of nodes among the multiple nodes that cannot communicate, displays on the map image the location of an additional node that should be added to the wireless mesh network to enable communication between the pair of nodes.

[0007] A communication system according to one aspect of the present invention includes the information terminal and the plurality of nodes.

[0008] A display method according to one aspect of the present invention is a display method executed by an information terminal, and includes the steps of displaying a map image that visualizes placement information showing the placement of multiple nodes that constitute a wireless mesh network, and displaying communication area information showing the communication area of ​​each of the multiple nodes, and, if it is determined based on the placement information that there is a pair of nodes among the multiple nodes that cannot communicate, the location of an additional node that should be added to the wireless mesh network to enable communication between the pair of nodes on the map image.

[0009] A program according to one aspect of the present invention is a program for causing the information terminal to execute the display method. [Effects of the Invention]

[0010] According to the present invention, an information terminal or the like is realized that can present to a user the position where a node should be added. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram illustrating a functional configuration of a communication system according to an embodiment. [Figure 2] FIG. 2 is a conceptual diagram of a mesh network. [Figure 3]FIG. 3 is a diagram showing an example of the arrangement of a plurality of lighting fixtures that are to form a mesh network. [Figure 4] FIG. 4 is a flowchart showing an example of an operation for determining a position where a repeater should be added. [Figure 5] FIG. 5 is a diagram for explaining a method for determining the position of a repeater. [Figure 6] FIG. 6 is a diagram showing an example of a display screen showing the location of a repeater. [Figure 7] FIG. 7 is a diagram for explaining a method for determining the position of a repeater according to a modified example. [Figure 8] FIG. 8 is a diagram showing another example of a display screen showing the location of a repeater. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, the embodiments will be described in detail with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component placement and connection forms, steps, and step order shown in the following embodiments are merely examples and are not intended to limit the present invention. Furthermore, among the components in the following embodiments, components not recited in independent claims will be described as optional components.

[0013] It should be noted that the drawings are schematic diagrams and are not necessarily strict illustrations. In addition, in the drawings, substantially the same components are denoted by the same reference numerals, and overlapping descriptions may be omitted or simplified.

[0014] (Embodiment) [composition] First, the configuration of a communication system according to an embodiment will be described. Fig. 1 is a block diagram showing the functional configuration of a communication system according to an embodiment. As shown in Fig. 1, a communication system 10 includes a plurality of lighting devices 20 and an information terminal 30.

[0015] In the communication system 10, each of the lighting fixtures 20 has a wireless communication function, and the lighting fixtures 20 form a wireless mesh network (hereinafter also simply referred to as a mesh network). The wireless mesh network is an example of a wireless communication network.

[0016] Figure 2 is a diagram conceptually illustrating a mesh network. Each circle in Figure 2 corresponds to a lighting fixture 20 (in other words, a communication node). In a mesh network, when information is transmitted from one communication node (also referred to as a first communication node) to another communication node (also referred to as a second communication node), the information is transmitted, for example, by a routing method, but may also be transmitted by other methods such as a flooding method.

[0017] The information transmitted through the mesh network is, for example, control information for controlling the turning on, turning off, or dimming of lighting fixtures 20. In addition, if an environmental sensor is included in the mesh network as described below, the measurement values ​​(sensing information) of the environmental sensor may also be transmitted.

[0018] First, the lighting fixture 20 will be described. The lighting fixture 20 is a base light or the like that is installed on the ceiling of an indoor space and illuminates the indoor space. As described above, each of the multiple lighting fixtures 20 has a wireless communication function, and the multiple lighting fixtures 20 form a mesh network. Note that the form of the lighting fixture 20 is not particularly limited, and it may be a ceiling light, a downlight, a spotlight, or the like. Specifically, the lighting fixture 20 includes a wireless communication unit 21, a light source 22, and a memory unit 23.

[0019] The wireless communication unit 21 is a wireless communication circuit that enables the lighting fixture 20 to communicate wirelessly (more specifically, via radio waves) with other lighting fixtures 20 and with the information terminal 30. After the lighting fixture 20 joins the mesh network, the wireless communication unit 21 communicates via the mesh network. Before the lighting fixture 20 joins the mesh network, the wireless communication unit 21 periodically transmits a beacon signal (also referred to as an advertisement signal) and individually communicates wirelessly with the information terminal 30 that receives the beacon signal. Specifically, the wireless communication unit 21 performs wireless communication in accordance with a communication standard such as Bluetooth (registered trademark) Low Energy (BLE) or Bluetooth (registered trademark) mesh.

[0020] Light source 22 emits white light into the indoor space so that lighting fixture 20 can illuminate the indoor space. Light source 22 is realized by, for example, an LED (Light Emitting Diode) element, but may also be realized by other light-emitting elements such as a semiconductor laser, an organic EL (Electro-Luminescence), or an inorganic EL.

[0021] Storage unit 23 is a storage device that stores various information necessary for operating lighting device 20, such as setting information described below. Storage unit 23 is realized by, for example, a semiconductor memory.

[0022] Next, the configuration of the information terminal 30 will be described. The information terminal 30 is an information terminal that a user uses to configure the mesh network (initial configuration and setting changes) and control multiple lighting fixtures 20. The information terminal 30 is, for example, a mobile terminal such as a smartphone, a tablet terminal, or a PDA (Personal Digital Assistant). The information terminal 30 may be a dedicated remote controller used in the communication system 10. Specifically, the information terminal 30 includes an operation reception unit 31, a display unit 32, a wireless communication unit 33, an information processing unit 34, and a storage unit 35.

[0023] The operation reception unit 31 receives operations from a user. Specifically, the operation reception unit 31 is realized by a touch panel or the like.

[0024] The display unit 32 displays various images and is realized by a display panel such as a liquid crystal panel or an organic EL panel.

[0025] Wireless communication unit 33 is a wireless communication circuit that enables information terminal 30 to perform wireless communication (more specifically, radio wave communication) with each of multiple lighting fixtures 20. Specifically, wireless communication unit 33 performs wireless communication in accordance with a communication standard such as BLE.

[0026] The information processing unit 34 performs information processing in response to a user operation received by the operation receiving unit 31. The information processing unit 34 is realized by, for example, a microcomputer, but may also be realized by a processor or a dedicated circuit. The functions of the information processing unit 34 are realized by hardware such as a microcomputer or processor constituting the information processing unit 34 executing a computer program (software) stored in the storage unit 35.

[0027] The storage unit 35 is a storage device that stores information necessary for information processing, such as a computer program executed by the information processing unit 34. The storage unit 35 is realized by, for example, a semiconductor memory. The computer programs stored in the storage unit 35 include dedicated application programs (also referred to as dedicated apps) for operating the information terminal 30 as either a setting terminal or a control terminal.

[0028] [Repeater location display behavior] When a mesh network is formed by multiple lighting fixtures 20, any one of the multiple lighting fixtures 20 can communicate with any other lighting fixture 20. However, if the lighting fixtures 20 are far apart, the communication path may be interrupted. FIG. 3 is a diagram showing an example of the arrangement (map image) of multiple lighting fixtures 20 that are to form a mesh network. The solid rectangular frame in FIG. 3 corresponds to the outline of the space, and the small circles correspond to the lighting fixtures 20. Hereinafter, the eight lighting fixtures 20 on the left side of FIG. 3 will be referred to as a first lighting fixture group, and the eight lighting fixtures 20 on the right side of FIG. 3 will be referred to as a second lighting fixture group.

[0029] A lighting fixture 20 included in the first lighting fixture group can communicate with other lighting fixtures 20 included in the first lighting fixture group, but cannot communicate with lighting fixtures 20 included in the second lighting fixture group because they are too far apart. Similarly, a lighting fixture 20 included in the second lighting fixture group can communicate with other lighting fixtures 20 included in the second lighting fixture group, but cannot communicate with lighting fixtures 20 included in the first lighting fixture group. For example, this type of case may occur when the first lighting fixture group forms a first mesh network and the second lighting fixture group forms a second mesh network, and the first mesh network and the second mesh network are integrated into a single mesh network.

[0030] In such cases, it is common to install an additional repeater in the space to enable communication between the first lighting device group and the second lighting device group. Note that the repeater may be, for example, another lighting device 20, but it may also be a dedicated communication device without any lighting function.

[0031] In the communication system 10, in order to support the user in adding a repeater, the information terminal 30 can present to the user the position in space where the repeater should be added (hereinafter also simply referred to as the position of the repeater). Such an operation will be described below. Figure 4 is a flowchart showing an example of the operation of determining the position where the repeater should be added.

[0032] The information processing unit 34 of the information terminal 30 acquires communication area information, placement information, and scale information that have been stored in advance in the storage unit 35 (S11). The communication area information is information indicating the communication area of ​​each of the multiple lighting fixtures 20, and is, for example, information indicating a typical radio wave reachable range (e.g., 15 m) of wireless communication by the wireless communication unit 21. The communication area information is determined in advance by a designer of the communication system 10 or the like and stored in the storage unit 35, but may also be determined by the user. Note that if the communication areas of the multiple lighting fixtures 20 differ in size, the communication area information may indicate the communication area of ​​each of the multiple lighting fixtures 20 individually.

[0033] The placement information is information that indicates the placement of multiple lighting fixtures 20. Specifically, when the placement information is visualized, a map image (a top view image of the space in which multiple lighting fixtures 20 are installed) such as that shown in Fig. 3 is obtained. The placement information (map image) is stored in advance in storage unit 35.

[0034] The scale information is information for converting coordinates on a map image into actual size. When the installation positions (coordinates) are specified in pixel values ​​in the placement information, the scale information is information for converting the pixel values ​​into actual size. The scale information is determined in advance by a designer of the communication system 10 or the like and stored in the storage unit 35. Note that when the placement information specifies the coordinates of multiple lighting fixtures 20 in actual size (when the placement information includes scale information), it is not necessary to prepare scale information.

[0035] Next, the information processing unit 34 identifies lighting fixtures 20 with which each of the plurality of lighting fixtures 20 can directly communicate (hereinafter also referred to as direct communication nodes) based on the acquired communication area information, placement information, and scale information (S12). In FIG. 3, for example, lighting fixture A in the map image can be assigned a communication area (hatched circular area) for lighting fixture A based on the communication area information and scale information. Lighting fixtures B to C located within the communication area can be identified as direct communication nodes.

[0036] Next, for each of the plurality of lighting fixtures 20, the information processing unit 34 identifies other lighting fixtures 20 that can directly or indirectly communicate with that lighting fixture 20 (hereinafter also referred to as communication-enabled nodes) (S13). For example, if lighting fixture A's direct communication nodes are lighting fixtures B and C and lighting fixture B's direct communication nodes include lighting fixture D, lighting fixture A can communicate with lighting fixtures B to D. In this way, the information processing unit 34 can successively identify communication-enabled nodes for each of the plurality of lighting fixtures 20.

[0037] Next, the information processing unit 34 determines whether all of the lighting devices 20 are located in positions where they can communicate with each other (S14). In other words, the lighting devices 20 determine whether there are any pairs of lighting devices 20 with which communication is not possible. For example, if all of the other lighting devices 20 are included in the nodes with which lighting device A can communicate, the information processing unit 34 determines that all of the lighting devices 20 are located in positions where they can communicate with each other (Yes in S14). In this case, a repeater is not required, and the operation ends.

[0038] On the other hand, if the communication nodes of lighting fixture A do not include all other lighting fixtures 20, the information processing unit 34 determines that all lighting fixtures 20 are not located in positions where they can communicate with each other (No in S14), and determines the location where a repeater should be added (hereinafter also referred to as the location of the repeater) (S15).

[0039] Hereinafter, the method for determining the position of a repeater will be described in more detail with reference to Fig. 5. Fig. 5 is a diagram for explaining the method for determining the position of a repeater.

[0040] The information processing unit 34 divides the lighting fixtures 20 into two groups, a first lighting fixture group and a second lighting fixture group, based on the communication nodes of each of the lighting fixtures 20, and identifies a first area in which the first lighting fixture group is installed (the dashed frame surrounding the first lighting fixture group on the left side of Figure 5) and a second area in which the second lighting fixture group is installed (the dashed frame surrounding the second lighting fixture group on the right side of Figure 5).

[0041] Next, the information processing unit 34 determines the location of the repeater in an intermediate area between the first area and the second area. The information processing unit 34 searches for the optimal repeater location, selecting a candidate on the line L located in the middle of the two rectangular frames (equally distant from the two rectangular frames). For example, the information processing unit 34 sets a virtual repeater and the repeater's communication area on the line L, and determines the optimal location as a location where the communication area includes at least one lighting device from the first lighting device group and at least one lighting device from the second lighting device group. If there are multiple such optimal locations, the information processing unit 34 determines the location where the sum of the distance between the repeater and one lighting device from the first lighting device group that is closest to the repeater and the distance between the repeater and one lighting device from the second lighting device group that is closest to the repeater is the shortest.

[0042] If such a position does not exist, the information processing unit 34 sets straight lines L1 and L2 that divide the intermediate area into thirds, sets virtual repeaters on each of L1 and L2, and performs a similar search.

[0043] After the repeater position is determined in step S15 as described above, the information processing unit 34 displays the determined repeater position on the display unit 32 (S16). Fig. 6 is a diagram showing an example of a display screen for repeater positions, and in the example of Fig. 6, four repeater positions are displayed on a map image. It is sufficient that at least one repeater position is displayed.

[0044] In this way, when the information terminal 30 determines that there is a pair of lighting fixtures 20 that cannot communicate among the lighting fixtures 20 based on the communication area information indicating the communication area of ​​each of the lighting fixtures 20 and the placement information, the information terminal 30 displays on the map image the location of a repeater (also referred to as an additional node) that should be added to the mesh network to enable communication between the pair of nodes. This allows the information terminal 30 to support the user in adding (installing) a repeater.

[0045] [Variations of the method for determining the repeater position] Next, a description will be given of a modified method of determining the position of a repeater in step S15. Fig. 7 is a diagram for explaining a modified method of determining the position of a repeater.

[0046] The information processing unit 34 divides the lighting fixtures 20 into two groups, a first lighting fixture group and a second lighting fixture group, based on the communication nodes of each of the lighting fixtures 20, and identifies a first area in which the first lighting fixture group is installed and a second area in which the second lighting fixture group is installed.

[0047] Next, the information processing unit 34 determines the location of a repeater in an intermediate area between the first area and the second area (the area surrounded by the dashed line frame in FIG. 7). The information processing unit 34 searches for the location of a repeater, selecting a candidate on the line L located midway between the first area and the second area. For example, the information processing unit 34 sets a virtual repeater and the communication area of ​​the repeater on the line L, and determines the location of one or more repeaters so that the intermediate area is covered by the communication area of ​​the repeater.

[0048] For example, the information processing unit 34 determines position A of the repeater so that the two upper corners of the intermediate area are in contact with the upper contour of the communication area. If the intermediate area is not covered by the communication area of ​​the repeater when the repeater is installed at position A, the information processing unit 34 further determines position B of another repeater so that the two lower corners of the intermediate area are in contact with the lower contour of the communication area. This causes the intermediate area to be covered by the communication areas of the two repeaters.

[0049] If the intermediate area is not covered by the communication area even if repeaters are installed at positions A and B, the information processing unit 34 determines the position of the midpoint between positions A and B as the position of another repeater. Also, if the communication area of ​​one repeater cannot cover the horizontal width of the intermediate area in Figure 7, the information processing unit 34 may search for the position of a repeater by selecting as candidates lines L1 and L2 that divide the horizontal width of the intermediate area into thirds.

[0050] After the repeater position is determined in step S15 as described above, in step S16, the information processing unit 34 displays the determined repeater position on the display unit 32, as shown in Fig. 8. Fig. 8 is a diagram showing another example of a display screen for the repeater position, and in the example of Fig. 8, the repeater positions are displayed in two places on a map image.

[0051] In this way, the information terminal 30 may determine the position of the repeater (also referred to as an additional node) so that the intermediate area is covered by the communication area of ​​the repeater. This allows the information terminal 30 to present the installation position of the repeater that will further improve the stability of communication.

[0052] [Other variations] In the above embodiment, each of the multiple nodes constituting the mesh network is a lighting fixture 20, but it does not have to be a lighting fixture 20. The multiple nodes may include lighting fixtures 20 and other devices, or may not include lighting fixtures 20 and only include other devices. The mesh network may also include an information terminal 30.

[0053] Examples of the other devices include a lighting remote controller operated by a user to control lighting fixture 20, a PWM (Pulse Width Modulation) dimmer, a scheduler, and an AC (Alternating Current) relay.

[0054] A PWM dimmer is a device that can dim the lighting fixture 20 attached to the PWM dimmer. A scheduler is a device that turns on, off, or dims the lighting fixture 20 according to a preset schedule.

[0055] AC relays include the following two types: a first AC relay and a second AC relay. The first AC relay is a device that is attached to a wiring duct and can turn on and off one device attached to the wiring duct by turning on and off the AC power to that device. The second AC relay is a device that is attached to the base of the wiring duct and can turn on and off all devices attached to the wiring duct by turning on and off the supply of AC power to that wiring duct. The AC relay may also be a wirelessly controlled switch that does not use a wiring duct.

[0056] The other devices may also be devices not directly related to lighting, such as an air conditioner, a ventilation system, a camera, a speaker, a motion sensor, or an environmental sensor. The environmental sensor may include a temperature sensor, a humidity sensor, a carbon dioxide concentration sensor, and a PM (Particle Matter) sensor.

[0057] [Effects, etc.] Hereinafter, examples of inventions that can be obtained from the disclosure of this specification will be given, and the effects and the like that can be obtained from these inventions will be explained.

[0058] Invention 1 is an information terminal 30 comprising a display unit 32 that displays a map image visualizing placement information showing the placement of multiple nodes that make up a wireless mesh network, and an information processing unit 34 that displays communication area information showing the communication area of ​​each of the multiple nodes, and, if it is determined based on the placement information that there is a pair of nodes among the multiple nodes that cannot communicate, displays on the map image the location of an additional node that should be added to the wireless mesh network to enable communication between the pair of nodes.

[0059] Such an information terminal 30 can present to the user the position where a node should be added.

[0060] Invention 2 is an information terminal 30 of Invention 1, in which the multiple nodes include a first node group including one node of the node set and a second node group including the other node of the node set, the nodes included in the first node group can communicate with other nodes included in the first node group but cannot communicate with nodes included in the second node group, and the nodes included in the second node group can communicate with other nodes included in the second node group but cannot communicate with nodes included in the first node group, and the information processing unit 34 determines the position of the additional node from within an intermediate area between a first area in which the first node group is installed and a second area in which the second node group is installed.

[0061] Such an information terminal 30 can determine the location in the intermediate area where a node should be added.

[0062] Invention 3 is the information terminal 30 of Invention 2, in which the information processing unit 34 determines the position of the additional node so that the intermediate area is covered by the communication area of ​​the additional node.

[0063] Such an information terminal 30 can present the installation position of a repeater that will further improve the stability of communication.

[0064] Invention 4 is information terminal 30 of any one of Inventions 1 to 3, in which lighting fixtures 20 are included in the plurality of nodes.

[0065] Such an information terminal 30 can present the installation position of a repeater that will further improve the stability of communication.

[0066] Invention 5 is a communication system 10 including an information terminal 30 according to any one of Inventions 1 to 4 and a plurality of nodes.

[0067] Such a communication system 10 can suggest to the user where to add a node.

[0068] Invention 6 is a display method executed by an information terminal 30, which includes the steps of displaying a map image that visualizes placement information showing the placement of multiple nodes that constitute a wireless mesh network, and communication area information showing the communication area of ​​each of the multiple nodes, and, if it is determined based on the placement information that there is a pair of nodes among the multiple nodes that cannot communicate, displaying on the map image the location of an additional node that should be added to the wireless mesh network to enable communication between the pair of nodes.

[0069] Such a display method can suggest to the user where to add a node.

[0070] A seventh aspect of the present invention is a program for causing the information terminal 30 to execute the display method of the sixth aspect of the present invention.

[0071] According to such a program, the information terminal 30 can present to the user the position where a node should be added.

[0072] (Other embodiments) Although the embodiments have been described above, the present invention is not limited to the above-described embodiments.

[0073] For example, in the above embodiment, a process executed by a specific processing unit may be executed by another processing unit. Also, the order of multiple processes may be changed, or multiple processes may be executed in parallel.

[0074] In the above-described embodiments, components such as the control unit may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory.

[0075] Furthermore, components such as the control unit may be realized by hardware. For example, components such as the control unit may be circuits (or integrated circuits). These circuits may form a single circuit as a whole, or may be separate circuits. Furthermore, each of these circuits may be a general-purpose circuit or a dedicated circuit.

[0076] Furthermore, the general or specific aspects of the present invention may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM, or as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

[0077] For example, the present invention may be realized as the communication system or information terminal of the above-described embodiments, or as a display method executed by an information terminal. The present invention may be realized as a program for causing an information terminal (computer) to execute such a display method, or as a computer-readable non-transitory recording medium on which such a program is recorded. The program is, in other words, a computer program product. Such a program includes an application program for causing a general-purpose information terminal to function as the information terminal of the above-described embodiments.

[0078] In addition, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art would think of, or forms realized by arbitrarily combining the components and functions of each embodiment within the scope of the present invention. [Explanation of symbols]

[0079] 10. Communication Systems 20 Lighting fixtures 21, 33 Radio Communication Department 22 Light source 23, 35 Storage section 30 Information terminal 31 Operation reception section 32 Display section 34 Information Processing Department

Claims

1. a display unit that displays a map image that visualizes placement information showing the placement of multiple nodes that make up the wireless mesh network; and an information processing unit that, when it is determined that there is a pair of nodes among the plurality of nodes with which communication is not possible based on communication area information indicating a communication area of ​​each of the plurality of nodes and the placement information, displays on the map image the location of an additional node that should be added to the wireless mesh network to realize communication between the pair of nodes. Information terminal.

2. the plurality of nodes includes a first node group including one node of the set of nodes, and a second node group including the other node of the set of nodes; a node included in the first node group can communicate with other nodes included in the first node group, but cannot communicate with nodes included in the second node group; a node included in the second node group can communicate with other nodes included in the second node group, but cannot communicate with nodes included in the first node group; The information processing unit determines the location of the additional node from within an intermediate area between a first area where the first node group is installed and a second area where the second node group is installed. The information terminal according to claim 1.

3. The information processing unit determines the position of the additional node so that the intermediate area is covered by the communication area of ​​the additional node.

3. The information terminal according to claim 2.

4. The plurality of nodes includes a lighting fixture. The information terminal according to claim 1.

5. An information terminal according to any one of claims 1 to 4; the plurality of nodes. Communication system.

6. A display method executed by an information terminal, comprising: displaying a map image that visualizes placement information indicating the placement of a plurality of nodes that configure the wireless mesh network; and when it is determined that there is a pair of nodes among the plurality of nodes that cannot communicate based on the communication area information indicating the communication area of ​​each of the plurality of nodes and the placement information, displaying on the map image the location of an additional node that should be added to the wireless mesh network to realize communication between the pair of nodes. Display method.

7. A program for causing the information terminal to execute the display method according to claim 6.

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