JP2021118398A - Communication system, mobile terminal, and program - Google Patents

Abstract

To provide a communication system that can provide tour information for users who walk in predetermined walking areas at low cost.SOLUTION: In a communication system 1, fixed terminals D01-D05 that transmit existence notification information are placed at tour points in a walking area R. A user walks in the walking area R while carrying a mobile terminal. When receiving the existence notification information from the fixed terminals D01-D05, the mobile terminal displays radio wave intensity-related information of a received radio wave of the existence notification information on a display unit of the mobile terminal.SELECTED DRAWING: Figure 1

Description

The present invention relates to a communication system, a mobile terminal, and a program, and more particularly to a communication system, a mobile terminal, and a program capable of providing tour information to a user who walks in a predetermined walking area at low cost. ..

Due to the growing awareness of people's health and the environment in recent years, hands-on tours (eco tours) that allow tourists to visit famous places or observe animals and plants while walking around in natural walking areas such as forests or plateaus are attracting attention. ing.

In Patent Document 1 below, in a collection area such as a natural park where insects inhabit, a collector learns the ecology by collecting insect ecology data instead of actual insects while visiting the collection area. A data collection system that can be used is disclosed.

Japanese Patent No. 3497124

However, in the above-mentioned eco-tour, the tour is generally held by a method in which a tour guide who is familiar with information on sightseeing points or observation points in the walking area leads the user. Therefore, it costs a lot to secure and train the human resources of the tour guide.

In addition, instead of being guided by a tour guide, we also propose an eco-tour in which a GPS navigation terminal in which map information including the tour point is registered is lent to the user, and the user goes around the tour point by himself / herself while operating the terminal. Has been done. However, since GPS navigation terminals are expensive, it still costs a lot to prepare a number of GPS navigation terminals according to the expected number of users.

The present invention has been made in view of such circumstances, and obtains a communication system, a mobile terminal, and a program capable of providing tour information to a user who walks in a predetermined walking area at low cost. The purpose is.

The communication system according to one aspect of the present invention includes one or more fixed terminals arranged at predetermined points in a predetermined walking area, and a mobile terminal carried by a user who walks in the walking area. The fixed terminal has an omnidirectional antenna and a transmission unit that transmits presence notification information, which is information for notifying the existence of the fixed terminal, from the omnidirectional antenna, and the mobile terminal is directional. The fixed terminal has a sex antenna, a receiving unit capable of receiving the presence notification information transmitted from the fixed terminal by the directional antenna, a display unit, and a display control unit, and the fixed terminal has the walking area. One or more first fixed terminals arranged at the tour points set in the inside are included, and the display control unit receives the existence notification information transmitted from the transmission unit of the first fixed terminal. When the unit receives the signal, the display unit displays radio wave strength-related information, which is information related to the radio wave strength of the received radio wave of the presence notification information.

According to the communication system according to this aspect, the first fixed terminal for transmitting the existence notification information is arranged at the tour point in the walking area, and the user walks in the walking area while carrying the mobile terminal. Then, when the receiving unit of the mobile terminal receives the existence notification information transmitted from the transmitting unit of the first fixed terminal, the display control unit of the mobile terminal carries the radio wave intensity-related information of the received radio wave of the existence notification information. Display on the display of the terminal. Therefore, the user can search for the direction of the tour point, which is the destination, by changing the direction of the directional antenna of the mobile terminal to find the direction in which the radio wave intensity is highest. In addition, the user can estimate how close he / she is to the tour point, which is the destination, by referring to the radio field intensity related information displayed on the display unit. As a result, since it is not necessary to guide the tour guide and use the GPS navigation terminal, it is possible to provide the tour information to the user who walks in the walking area at low cost. Moreover, since the user himself changes the direction of the directional antenna to search for the destination, he feels uplifted that he is exploring the walking area with his own thoughts and judgments, not with the guidance of the tour guide. , Can be given to the user.

In the communication system according to the above aspect, the mobile terminal further includes a distance calculation unit that calculates a distance between the first fixed terminal and the mobile terminal based on the radio wave intensity, and the display control unit includes a display control unit. As the radio wave intensity related information, it is desirable to display the distance calculated by the distance calculation unit on the display unit.

According to the communication system according to this aspect, the distance calculation unit calculates the distance between the first fixed terminal and the mobile terminal, and the display control unit displays the distance calculated by the distance calculation unit on the display unit. do. Therefore, the user can intuitively grasp the distance from the current location to the tour point which is the destination.

In the communication system according to the above aspect, the first fixed terminal is a plurality, each of the plurality of first fixed terminals is assigned unique identification information, and each of the plurality of first fixed terminals is assigned. The transmitting unit has transmitted the existence notification information including its own identification information, and the display control unit transmits the identification information included in the existence notification information received by the receiving unit to the radio wave. It is desirable to include it in the strength-related information and display it on the display unit.

According to the communication system according to this aspect, a plurality of first fixed terminals to which unique identification information is assigned are arranged in the walking area, and the display control unit is notified of the existence received by the reception unit. The identification information included in the information is included in the radio field strength related information and displayed on the display unit. Therefore, even if a plurality of first fixed terminals are designated by the user selecting a plurality of tour points as the destination, the user can refer to the identification information displayed on the display unit to obtain a plurality of first fixed terminals. It is possible to accurately grasp the correspondence between the radio field strength related information and multiple tour points.

In the communication system according to the above aspect, the mobile terminal further has a registration unit in which the identification information of one or more arbitrary first fixed terminals selected from the plurality of first fixed terminals is registered. It is desirable that the display control unit displays the radio field intensity related information of only the arbitrary first fixed terminal registered in the registration unit among the plurality of first fixed terminals on the display unit.

According to the communication system according to this aspect, the identification information of one or more arbitrary first fixed terminals selected from a plurality of first fixed terminals is registered in the registration unit, and the display control unit is a display control unit. Among the plurality of first fixed terminals, the radio field intensity related information of only any first fixed terminal registered in the registration unit is displayed on the display unit. Therefore, with respect to the first fixed terminal corresponding to the tour point that the user has not selected as the destination, the radio field intensity related information is not displayed on the display unit, so that the display content on the display unit can be simplified. As a result, it is possible to improve the accessibility of necessary information by the user.

In the communication system according to the above aspect, the fixed terminal includes one or more second fixed terminals arranged in a return route set in the walking area, and the mobile terminal is a route of the return route. The route information storage unit in which the information is stored, the return request input unit that receives the return request from the user who operates the mobile terminal, and the existence notification information transmitted from the transmission unit of the second fixed terminal are described. When the receiving unit receives the information, the display control unit further includes a current location detecting unit that detects the current location of the mobile terminal based on the radio wave intensity of the received radio wave of the existence notification information, and the display control unit inputs the return request. When the unit receives the return request, the display unit may display the route information read from the route information storage unit and the information indicating the current location of the mobile terminal detected by the current location detection unit. desirable.

According to the communication system according to this aspect, the current location detection unit detects the current location of the mobile terminal based on the radio wave intensity of the received radio wave of the existence notification information transmitted from the second fixed terminal. Therefore, the user's current location can be detected by a low-cost method that does not use GPS. Further, when the return request input unit receives the return request, the display control unit outputs the route information of the return route read from the route information storage unit and the information indicating the current location of the mobile terminal detected by the current location detection unit. Display on the display. Therefore, the user who has input the return request can safely return by following the return route by referring to the information displayed on the display unit.

In the communication system according to the above aspect, the fixed terminal includes one or more third fixed terminals arranged at the outer edge boundary of the walking area, and the display control unit is the transmission included in the third fixed terminal. When the receiving unit receives the existence notification information transmitted from the unit, it is desirable to display the warning information for notifying the approach to the outer edge boundary on the display unit.

According to the communication system according to this aspect, the third fixed terminal is arranged at the outer edge boundary of the walking area, and the display control unit receives the existence notification information transmitted from the transmission unit of the third fixed terminal. Is received, warning information for notifying the approach to the outer edge boundary is displayed on the display unit. Therefore, it is possible to prevent the user from accidentally leaving the walking area, and it is possible to reduce the risk of distress.

In the communication system according to the above aspect, there are a plurality of the fixed terminals, and it is desirable that the plurality of fixed terminals form a network by wireless communication using the omnidirectional antenna.

According to the communication system according to this aspect, a plurality of fixed terminals are arranged in the walking area, and the plurality of fixed terminals form a network by wireless communication. Therefore, it is possible to construct an easy-to-operate network in the walking area at low cost.

In the communication system according to the above aspect, the network includes a first fixed terminal group including the plurality of the fixed terminals, and any of the fixed terminals including the plurality of the fixed terminals and included in the first fixed terminal group. A second fixed terminal group that does not include a fixed terminal capable of directly communicating with a terminal, and at least one fixed terminal included in the first fixed terminal group and the second fixed terminal group. It is desirable to further include a relay terminal that relays communication with at least one fixed terminal included in the fixed terminal group.

According to the communication system according to this aspect, the relay terminal communicates between at least one fixed terminal included in the first fixed terminal group and at least one fixed terminal included in the second fixed terminal group. Relay. In a vast walking area, multiple fixed terminals are divided into a first fixed terminal group and a second fixed terminal group that cannot directly communicate due to the existence of valley bottoms or rivers where fixed terminals cannot be placed. May be done. Even in such a case, communication for all fixed terminals can be realized by providing a relay terminal for relaying communication between the first fixed terminal group and the second fixed terminal group in the communication system. It is possible to build a network that is used.

In the communication system according to the above aspect, a control terminal connected to the network is further provided, and the mobile terminal includes a rescue request input unit that receives a rescue request from a user who operates the mobile terminal, and a rescue request input unit. When the rescue request is received, the fixed terminal further includes a rescue request transmitting unit for transmitting the rescue request, and the fixed terminal has a rescue request receiving unit capable of receiving the rescue request transmitted from the mobile terminal. When the rescue request receiving unit receives the rescue request, it is desirable to further have a communication unit that communicates the rescue request toward the control terminal.

According to the communication system according to this aspect, the mobile terminal transmits the rescue request when the rescue request from the user is received, and the fixed terminal receives the rescue request transmitted from the mobile terminal, the control terminal. Communicate a rescue request to. Therefore, the administrator can know that there is a user requesting rescue, and can immediately start the rescue operation.

The mobile terminal according to one aspect of the present invention is a mobile terminal that uses a communication system including one or more fixed terminals arranged at a predetermined point in a predetermined walking area, and is a directional antenna and the fixed terminal. The reception unit, the display unit, the display control unit, and the reception unit, the display unit, and the display control unit, which can receive the existence notification information, which is the information for notifying the existence of the fixed terminal, transmitted from the omnidirectional antenna possessed by the directional antenna. When the receiving unit receives the presence notification information transmitted from the fixed terminal, the display control unit is information related to the radio wave strength of the received radio wave of the presence notification information. Is displayed on the display unit.

According to the mobile terminal according to this aspect, a fixed terminal for transmitting existence notification information is arranged in the walking area, and the user walks in the walking area while carrying the mobile terminal. Then, when the receiving unit receives the existence notification information transmitted from the fixed terminal, the display control unit of the mobile terminal displays the radio wave intensity-related information of the received radio wave of the existence notification information on the display unit. Therefore, the user can search for the direction of the tour point, which is the destination, by changing the direction of the directional antenna of the mobile terminal to find the direction in which the radio wave intensity is highest. In addition, the user can estimate how close he / she is to the tour point, which is the destination, by referring to the radio field intensity related information displayed on the display unit. As a result, since it is not necessary to guide the tour guide and use the GPS navigation terminal, it is possible to provide the tour information to the user who walks in the walking area at low cost.

In the program according to one aspect of the present invention, the fixed terminal has a computer mounted on a mobile terminal using a communication system including one or more fixed terminals arranged at a predetermined point in a predetermined walking area. Receiving means that can receive the existence notification information transmitted from the directional antenna, which is information for notifying the existence of the fixed terminal, by the directional antenna of the mobile terminal, and the receiving means can receive the existence notification information. Is a program for functioning as a display control means for displaying radio wave strength-related information, which is information related to the radio wave strength of the received radio wave of the presence notification information, on the display unit of the mobile terminal. be.

According to the program according to this aspect, a fixed terminal for transmitting existence notification information is arranged in the walking area, and the user walks in the walking area while carrying the mobile terminal. Then, when the receiving means receives the existence notification information transmitted from the fixed terminal, the display control means displays the radio wave intensity related information of the received radio wave of the existence notification information on the display unit of the mobile terminal. Therefore, the user can search for the direction of the tour point, which is the destination, by changing the direction of the directional antenna of the mobile terminal to find the direction in which the radio wave intensity is highest. In addition, the user can estimate how close he / she is to the tour point, which is the destination, by referring to the radio field intensity related information displayed on the display unit. As a result, since it is not necessary to guide the tour guide and use the GPS navigation terminal, it is possible to provide the tour information to the user who walks in the walking area at low cost.

According to the present invention, it is possible to provide tour information to a user who walks in a predetermined walking area at low cost.

It is a figure which shows typically the whole structure of the communication system which concerns on embodiment of this invention. It is a block diagram which shows the structure of a fixed terminal. It is a figure which shows the function realized by the control part of a fixed terminal. It is a figure which shows the information stored in the storage part of a fixed terminal. It is a block diagram which shows the structure of a mobile terminal. It is a figure which shows the function realized by the control part of a mobile terminal. It is a figure which shows the information stored in the storage part of a mobile terminal. It is a block diagram which shows the 1st modification about the structure of a mobile terminal. It is a block diagram which shows the 2nd modification about the structure of a mobile terminal. It is a block diagram which shows the structure of a relay terminal. It is a block diagram which shows the structure of a control terminal. It is a figure which shows the function realized by the control part of a control terminal. It is a figure which shows the information stored in the storage part of a control terminal. It is a figure which shows an example of the display mode of the radio wave strength-related information on a display part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Elements with the same reference numerals in different drawings indicate the same or corresponding elements.

<System configuration>
FIG. 1 is a diagram schematically showing an overall configuration of a communication system 1 according to an embodiment of the present invention. The communication system 1 is constructed in a natural walking area R such as a forest or a plateau. In FIG. 1, the outer edge boundary of the walking area R is indicated by a chain line, and the walking route of the user set in the walking area R is indicated by a thick broken line. The user walks around in the walking area R along the walking route and visits the tour points set in advance in the walking area R (sightseeing of famous places, observation of animals and plants, etc.).

Communication system 1 includes a control terminal 30 (see FIG. 11) to which ID information “A01” is assigned as identification information. In the present specification, the control terminal 30 may be referred to as "control terminal A01" by using the ID information thereof. The control terminal A01 is installed in the management building where the manager of the walking area R is resident, and is operated by the manager. The administration building is provided, for example, near the starting point where the user starts walking.

Further, the communication system 1 includes a mobile terminal 20 (see FIG. 5) to which the ID information "Z01" is assigned as the identification information. In this specification, the mobile terminal 20 may be referred to as "mobile terminal Z01". The mobile terminal Z01 is a terminal carried by a user who walks in the walking area R, and is lent to the user by the administrator before the start of the walk. Note that FIG. 1 shows an example in which only one mobile terminal 20 exists in the walking area R, but the present invention is not limited to this example, and a plurality of mobile terminals 20 are simultaneously present in the walking area R. It can also exist.

Further, the communication system 1 includes a fixed terminal 10 (see FIG. 2) to which ID information “C01” to “C08” are assigned as identification information. In the present specification, the fixed terminal 10 to which the ID information "C01" to "C08" is assigned may be referred to as a "boundary terminal". The boundary terminals C01 to C08 are arranged at fixed points along the outer edge boundary of the walking area R.

Further, the communication system 1 includes a fixed terminal 10 to which ID information "B01" to "B08" are assigned as identification information. In the present specification, the fixed terminal 10 to which the ID information "B01" to "B08" is assigned may be referred to as a "route terminal". The route terminals B01 to B08 are arranged at fixed points along a return route set as a route for the user to safely return to the starting point. Although FIG. 1 shows an example in which the return route and the walking route are common, the return route may be provided separately from the walking route.

Further, the communication system 1 includes a fixed terminal 10 to which ID information "D01" to "D05" are assigned as identification information. In the present specification, the fixed terminal 10 to which the ID information "D01" to "D05" is assigned may be referred to as a "visit terminal". The tour terminals D01 to D05 are arranged at fixed points at the tour points set in the walking area R.

Note that FIG. 1 shows an example in which five tour terminals D01 to D05 are arranged, but the present invention is not limited to this example, and the number of tour terminals may be one or more. Similarly, FIG. 1 shows an example in which eight route terminals B01 to B08 and boundary terminals C01 to C08 are arranged, but not limited to this example, the number of route terminals and boundary terminals is 1, respectively. It is enough if it is more than one.

As shown in FIG. 1, a plurality of fixed terminals 10 are arranged in the walking area R, and these plurality of fixed terminals 10 form a network for communicating by wireless communication. The plurality of fixed terminals 10 form, for example, a mesh network for multi-hop communication.

Further, the communication system 1 includes a relay terminal 40 (see FIG. 10) to which the ID information "E01" is assigned as the identification information. In the vast walking area R, all the fixed terminals 10 may be divided into a plurality of fixed terminal groups in which the fixed terminals cannot directly communicate with each other due to the existence of a valley bottom or a river where the fixed terminals 10 cannot be arranged. be. In FIG. 1, all fixed terminals 10 include a first fixed terminal group including route terminals B01 to B06, boundary terminals C01 to C05, and tour terminals D01 to D03, route terminals B07, B08, and boundary terminals C06 to C08. , And an example of being divided into a second fixed terminal group including the tour terminals D04 and D05. None of the fixed terminals 10 included in the first fixed terminal group can directly perform wireless communication with all the fixed terminals 10 included in the second fixed terminal group. Similarly, none of the fixed terminals 10 included in the second fixed terminal group can directly perform wireless communication with all the fixed terminals 10 included in the first fixed terminal group. The relay terminal E01 is installed between the first fixed terminal group and the second fixed terminal group. The relay terminal E01 includes at least one fixed terminal 10 (for example, route terminal B04) included in the first fixed terminal group and at least one fixed terminal 10 (for example, route) included in the second fixed terminal group. The wireless communication with the terminal B07) is relayed. If all the fixed terminals 10 are not divided into a plurality of fixed terminal groups, it is not necessary to install the relay terminal 40.

FIG. 2 is a block diagram showing the configuration of the fixed terminal 10. As shown in the connection relationship of FIG. 2, the fixed terminal 10 includes an omnidirectional antenna 11, a communication unit 12, a control unit 13, a storage unit 14, and a power supply 17. The omnidirectional antenna 11 supports bidirectional wireless digital communication using a frequency band of the 2.4 GHz band conforming to the communication standard of IEEE802.1.5. The transmission / reception range of radio waves using the omnidirectional antenna 11 is, for example, several tens of meters. The communication unit 12 includes a receiving circuit having an amplifier, a mixer, a demodulator, and the like, and a transmitting circuit having a modulator, an oscillator, an amplifier, and the like. The control unit 13 includes a data processing device such as a CPU. The storage unit 14 includes a data storage device such as a ROM and a RAM. The power source 17 is a button-type battery, a coin-type battery, or the like, and supplies drive power to the communication unit 12, the control unit 13, and the storage unit 14.

FIG. 3 is a diagram showing a function realized by the control unit 13 of the fixed terminal 10. Further, FIG. 4 is a diagram showing information stored in the storage unit 14 of the fixed terminal 10.

ID information 141, transmission interval information 343, and program 143 are stored in the storage unit 14. The ID information 141 is ID information assigned to its own fixed terminal 10. When the control unit 13 reads the program 143 from the storage unit 14 and executes it, the control unit 13 has the presence notification information transmission unit 131 (transmission unit), the transmission interval processing unit 132, and the rescue request processing unit 133 (rescue request reception unit). ), And functions as a communication unit 134 (communication unit). A detailed description of FIGS. 3 and 4 will be described later.

FIG. 5 is a block diagram showing the configuration of the mobile terminal 20. As shown in the connection relationship of FIG. 5, the mobile terminal 20 includes a directional antenna 21, a communication unit 22, a control unit 23, and a storage unit 24 (registration unit, route information storage unit, danger information storage unit, map information storage unit). , Display unit 25, input unit 26 (return request input unit, rescue request input unit), and power supply 27. The directional antenna 21 supports bidirectional wireless digital communication using a frequency band of the 2.4 GHz band conforming to the communication standard of IEEE802.1.5. The transmission / reception range of radio waves using the directional antenna 21 is, for example, several hundred meters. The communication unit 22 includes a receiving circuit having an amplifier, a mixer, a demodulator, and the like, and a transmitting circuit having a modulator, an oscillator, an amplifier, and the like. The control unit 23 includes a data processing device such as a CPU. The storage unit 24 includes a data storage device such as a ROM and a RAM. The display unit 25 and the input unit 26 are configured as, for example, a touch panel display using a liquid crystal display device, an organic EL display device, or the like. The power source 27 is a rechargeable lithium-ion battery or the like used as a built-in battery of a smartphone or the like, and supplies drive power to a communication unit 22, a control unit 23, a storage unit 24, a display unit 25, and an input unit 26.

FIG. 6 is a diagram showing a function realized by the control unit 23 of the mobile terminal 20. Further, FIG. 7 is a diagram showing information stored in the storage unit 24 of the mobile terminal 20.

The storage unit 24 stores ID information 241, selected terminal registration information 242, return route information 344, map information 345, danger information 346, distance conversion information 348, and program 247. The ID information 241 is ID information assigned to the own mobile terminal 20. When the control unit 23 reads the program 247 from the storage unit 24 and executes it, the control unit 23 includes the existence notification information receiving unit 231 (receiving unit), the display control unit 232, the distance calculation unit 233, the current location detection unit 234, and the rescue unit. It functions as a request processing unit 235 (rescue request transmission unit), an information receiving unit 236, and a selection processing unit 237. A detailed description of FIGS. 6 and 7 will be described later.

FIG. 8 is a block diagram showing a first modification of the configuration of the mobile terminal 20. The first modification corresponds to the configuration shown in FIG. 5, in which the directional antenna 21 and the communication unit 22 are physically separated from other processing blocks.

The mobile terminal 20 is separated into two processing block groups 20A and 20B. The processing block group 20B includes a directional antenna 21B, a communication unit 22B, and a power supply 27B. The processing block group 20A includes an omnidirectional antenna 21A, a communication unit 22A, a control unit 23, a storage unit 24, a display unit 25, an input unit 26, and a power supply 27A. The communication unit 22B and the communication unit 22A can communicate with each other by wireless communication via the directional antenna 21B and the omnidirectional antenna 21A.

According to the first modification, since the directional antenna 21B and the display unit 25 are physically separated, the degree of freedom when scanning the directional antenna 21B can be increased. Further, when a plurality of users are acting in a group, the roles can be divided between the user holding the directional antenna 21B (processing block group 20B) and the user holding the display unit 25 (processing block group 20A). Therefore, it is possible to enhance the sense of solidarity between users.

FIG. 9 is a block diagram showing a second modification of the configuration of the mobile terminal 20. The second modification corresponds to the processing block group 20A shown in FIG. 8 in which the display unit 25 and the input unit 26 are physically separated from the other processing blocks.

The mobile terminal 20 is divided into three processing block groups 20A to 20C. The processing block group 20A includes an omnidirectional antenna 21A, communication units 22A and 28A, a control unit 23, a storage unit 24, and a power supply 27A. The processing block group 20C includes a communication unit 28C, a display unit 25, an input unit 26, and a power supply 27C. The communication unit 28A and the communication unit 28C can communicate with each other by wired communication (or short-range wireless communication) such as USB. The processing block group 20C may be substituted by a smartphone or the like owned by the user.

According to the second modification, in addition to the effect of the first modification, the processing block group 20C can be substituted by a smartphone or the like owned by the user, so that the mobile terminal 20 (processing block group 20A and processing block group 20B) Manufacturing cost can be reduced.

FIG. 10 is a block diagram showing the configuration of the relay terminal 40. As shown in the connection relationship of FIG. 10, the relay terminal 40 includes directional antennas 41A and 41B, a communication unit 42, a control unit 43, a storage unit 44, and a power supply 47. The directional antennas 41A and 41B support bidirectional wireless digital communication using a frequency band of 2.4 GHz band conforming to the communication standard of IEEE802.154. The transmission / reception range of radio waves using the directional antennas 41A and 41B is, for example, several hundred meters. The directional antenna 41A directs the arrangement direction of at least one fixed terminal 10 (for example, the route terminal B04) included in the first fixed terminal group. The directional antenna 41B directs the arrangement direction of at least one fixed terminal 10 (for example, the route terminal B07) included in the second fixed terminal group. The communication unit 42 includes a receiving circuit having an amplifier, a mixer, a demodulator, and the like, and a transmitting circuit having a modulator, an oscillator, an amplifier, and the like. The control unit 43 includes a data processing device such as a CPU. The storage unit 44 includes a data storage device such as a ROM and a RAM. The storage unit 44 stores ID information assigned to its own relay terminal 40. The power source 47 is a large-capacity rechargeable lithium-ion battery or the like, and supplies driving power to the communication unit 42, the control unit 43, and the storage unit 44.

FIG. 11 is a block diagram showing the configuration of the control terminal 30. As shown in the connection relationship of FIG. 11, the control terminal 30 includes an omnidirectional antenna 31, communication units 32 and 38, a control unit 33, a storage unit 34, a display unit 35, an input unit 36, and a power supply 37. .. The omnidirectional antenna 31 supports bidirectional wireless digital communication using a frequency band of 2.4 GHz band conforming to the communication standard of IEEE802.154. The transmission / reception range of radio waves using the omnidirectional antenna 31 is, for example, several tens of meters. The communication unit 32 includes a receiving circuit having an amplifier, a mixer, a demodulator, and the like, and a transmitting circuit having a modulator, an oscillator, an amplifier, and the like. The control unit 33 includes a data processing device such as a CPU. The storage unit 34 includes a data storage device such as a ROM, a RAM, a hard disk, and an SSD. The display unit 35 includes an arbitrary display device such as a liquid crystal display device or an organic EL display device. The input unit 36 includes an arbitrary input device such as a keyboard and a mouse. The communication unit 38 is connected to the database server 50 via an arbitrary communication network 39 such as a LAN. The power supply 37 is a commercial power supply of AC100V or the like, and supplies drive power to the communication units 32 and 38, the control unit 33, the storage unit 34, the display unit 35, and the input unit 36.

FIG. 12 is a diagram showing a function realized by the control unit 33 of the control terminal 30. Further, FIG. 13 is a diagram showing information stored in the storage unit 34 of the control terminal 30.

ID information 341, all terminal ID information 342, transmission interval information 343, return route information 344, map information 345, danger information 346, rescue request information 347, distance conversion information 348, and program 349 are stored in the storage unit 34. ing. The ID information 341 is ID information assigned to its own control terminal 30. All terminal ID information 342 is ID information assigned to all fixed terminals 10, all mobile terminals 20, and all relay terminals 40.

When the control unit 33 reads the program 349 from the storage unit 34 and executes it, the control unit 33 includes the existence notification information transmission unit 331, the transmission interval setting unit 332, the communication unit 333, the display control unit 334, and the distance setting unit 335. It functions as a return route setting unit 336, a danger information setting unit 337, a rescue request processing unit 338, a map setting unit 339, and an information transmission unit 340.

<Processes executed by the control terminal before the start of the walk>
This will be described with reference to FIGS. 3 to 7 and 11 to 13. The danger information setting unit 337 stores the latest danger information 346 by creating or updating the danger information of the walking area R based on the rockfall information or the pest information input from the input unit 36 by the administrator. Store in 34. The danger information 346 includes association information between the content of the danger and the ID information of the fixed terminal 10 closest to the danger occurrence point.

The return route setting unit 336 creates or updates a return route from each point in the walking area R to the departure point (or a predetermined evacuation point) based on the latest danger information 346 or the like, thereby creating or updating the latest return route. Information 344 is stored in the storage unit 34.

The map setting unit 339 acquires the map information of the walking area R created in advance by the administrator from the database server 50 or the like, and updates the map when the map update information is input from the input unit 36 by the administrator. By reflecting the information in the existing map information, the latest map information 345 is stored in the storage unit 34. The map information 345 includes topographical information in the walking area R, tour point information, walking route information, return route information, and the like. Further, the map information 345 includes association information between the ID information and the position information of the arrangement point for all the fixed terminals 10. The map information 345 may include association information between the ID information and the position information of the arrangement point regarding the control terminal 30 and all the relay terminals 40.

The distance setting unit 335 creates distance conversion information 348 for converting the radio wave intensity of the received radio wave in wireless communication into a distance, and stores it in the storage unit 34. For example, the route terminal B01 closest to the control terminal A01 shown in FIG. 1 transmits a test radio wave from the omnidirectional antenna 11 with a constant transmission radio wave intensity, and the control terminal A01 transmits the test radio wave by the omnidirectional antenna 31. Receive. Since the distance between the control terminal A01 and the route terminal B01 is known, the distance setting unit 335 has a conversion coefficient that defines the correlation between the signal strength of the received test radio wave and the distance between the control terminal A01 and the route terminal B01. , Function formula, conversion table, etc., to create distance conversion information 348 for converting radio field strength into distance. Even if the transmitted radio wave strength is constant, the received radio wave strength fluctuates according to the weather, etc., so the distance setting unit 335 prepares the distance conversion information 348 according to the weather, etc. of the day by creating the distance conversion information 348. can do.

The transmission interval setting unit 332 sets a transmission time interval in which each fixed terminal 10 repeatedly transmits existence notification information (details will be described later), and stores the transmission interval information 343, which is the setting information, in the storage unit 34. The transmission interval setting unit 332 has a relatively long transmission time interval (for example, 30 minutes) in a situation where, for example, the user does not exist in the walk area R before the scheduled start time of the walk of all the users on that day. To set. On the other hand, the transmission interval setting unit 332 has a relatively short transmission time interval (for example, 1 second) in a situation where the user exists in the walking area R after the scheduled start time of walking of any user on that day. To set.

When the transmission interval setting unit 332 updates the transmission interval information 343, the communication unit 333 transmits the latest transmission interval information 343 read from the storage unit 34 from the omnidirectional antenna 31 toward all the fixed terminals 10. (For example, broadcast transmission). Alternatively, when the communication route between the fixed terminals 10 is defined by a routing table or the like, the communication unit 333 sends the latest transmission interval information 343 read from the storage unit 34 to the next fixed terminal 10 of the communication route ( For example, transmission (for example, multicast transmission or unicast transmission) is performed from the omnidirectional antenna 31 toward the route terminal B01 and the boundary terminals C01 and C02).

The transmission interval processing unit 132 of the fixed terminal 10 stores the latest transmission interval information 343 received by the omnidirectional antenna 11 in the storage unit 14, and thereafter, a predetermined value set in the latest transmission interval information 343. The existence notification information is repeatedly transmitted at the transmission time interval.

Further, the communication unit 134 of the fixed terminal 10 transmits (for example, broadcast transmission) the latest transmission interval information 343 read from the storage unit 14 toward all the fixed terminals 10 from the omnidirectional antenna 11. Alternatively, when the communication route is defined, the communication unit 134 directs the latest transmission interval information 343 read from the storage unit 14 toward the next fixed terminal 10 of the communication route from the omnidirectional antenna 11. Transmission (for example, multicast transmission or unicast transmission). Similarly, the latest transmission interval information 343 is sequentially transmitted by communication between the fixed terminals 10, so that the transmission time interval of the existence notification information is set in all the fixed terminals 10 based on the latest transmission interval information 343. Will be updated.

The information transmission unit 340 sends the latest return route information 344, map information 345, danger information 346, and distance conversion information 348 read from the storage unit 34 toward all the mobile terminals 20 scheduled to be used on that day. , Transmit from the omnidirectional antenna 31.

The information receiving unit 236 of the mobile terminal 20 stores the latest return route information 344, map information 345, danger information 346, and distance conversion information 348 received by the directional antenna 21 in the storage unit 24.

The user who has lent the mobile terminal 20 from the administrator selects one or more tour points to be visited on that day from all the tour points set in the walking area R, and inputs the selection information from the input unit 26. input. The selection processing unit 237 identifies the ID information 141 (see FIG. 4) of the tour terminal arranged at the selected tour point based on the selection information input from the input unit 26, and the specified ID information 141. Is stored in the storage unit 24 as the selected terminal registration information 242.

<Normal processing during a walk>
This will be described with reference to FIGS. 2 to 7. The user walks in the walking area R toward the destination, the tour point, while carrying the mobile terminal 20.

While the user is taking a walk, all the fixed terminals 10 are executing the process of transmitting the existence notification information. The existence notification information transmission unit 131 of the fixed terminal 10 includes the ID information 141 read from the storage unit 14 to generate existence notification information which is information for notifying the existence of its own fixed terminal 10. Further, the existence notification information transmission unit 131 reads the generated existence notification information from the storage unit 14 at a predetermined transmission time interval defined by the transmission interval information 343, and the omnidirectional antenna 11 is transmitted via the communication unit 12. Send repeatedly from.

The presence notification information receiving unit 231 of the mobile terminal 20 can receive the presence notification information transmitted from the fixed terminal 10 by the directional antenna 21. In the communication system 1 according to the present embodiment, the user who walks in the walking area R changes the direction of the directional antenna 21 of the mobile terminal 20 to have the highest radio wave strength of the received radio wave of the existence notification information. By finding out, the direction of the tour site, which is the destination, is searched. In the following description, the case where the tour point where the tour terminals D02 and D03 are arranged is selected as the destination by the user will be taken as an example. In this case, the ID information 141 "D02" and "D03" of the tour terminals D02 and D03 are registered in the storage unit 24 of the mobile terminal 20 as the selected terminal registration information 242 shown in FIG. 7. Further, in the following description, the tour terminals D02 and D03 will be referred to as "selective tour terminals D02 and D03".

If the selection tour terminals D02 and D03 exist in the direction in which the user points the directional antenna 21, and the distance from the mobile terminal 20 to the selection tour terminals D02 and D03 is within the reception range of the directional antenna 21, it exists. The notification information receiving unit 231 receives the existence notification information transmitted from the existence notification information transmitting unit 131 of the selective tour terminals D02 and D03 by the directional antenna 21.

When the existence notification information receiving unit 231 receives the existence notification information transmitted from the selection tour terminals D02 and D03, the display control unit 232 is information related to the radio wave strength of the received radio wave of the existence notification information. The information is displayed on the display unit 25 of the mobile terminal 20. Here, the display control unit 232 displays the radio field strength-related information of only the selected tour terminals D02 and D03 registered as the selected terminal registration information 242 among all the tour terminals D01 to D05, and the other tour terminals D01. , D04, D05 radio field strength related information is not displayed. However, the display control unit 232 may display not only the radio field intensity related information of the selected tour terminals D02 and D03 but also the radio field strength related information of the other tour terminals D01, D04 and D05 on the display unit 25.

FIG. 14 is a diagram showing an example of a mode in which radio wave intensity-related information is displayed on the display unit 25. In the example shown in FIG. 14, the numerical value itself of the radio wave intensity of the received radio wave of the existence notification information is displayed on the display unit 25 as the radio wave intensity related information. Further, "D02" and "D03", which are ID information 141 of the selection tour terminals D02 and D03, are displayed on the display unit 25. Further, the name of the selected tour point is associated with the ID information 141 of the selected tour terminals D02 and D03 and displayed on the display unit 25 so that the user can easily understand it. The display mode of the radio wave strength-related information is not limited to the example shown in FIG. 14, and the display mode of the graphic display in which the strength of the radio wave strength is shown by the length of the bar graph for each ID information 141 of the selective tour terminals D02 and D03. Or the like, or the distance converted from the radio field strength by the distance calculation unit 233 may be displayed. The distance calculation unit 233 converts the radio wave intensity of the received radio wave of the existence notification information received by the existence notification information receiving unit 231 into a distance based on the distance conversion information 348 read from the storage unit 24.

The existence notification information receiving unit 231 receives the existence notification information transmitted not only from the selective tour terminals D02 and D03 but also from all the fixed terminals 10 located within the radio wave reception range. The current location detection unit 234 detects the current location of the mobile terminal 20 based on the radio wave intensity of the received radio wave of the received presence notification information. For example, the current location detection unit 234 specifies the distance from the mobile terminal 20 to the plurality of fixed terminals 10 based on the radio wave intensity of the received radio wave of the existence notification information, so that the mobile terminal based on the plurality of fixed terminals 10 is used as a reference. Detects 20 relative positions. Information on the absolute positions of the plurality of fixed terminals 10 in the walking area R is included in the map information 345. Therefore, the current location detection unit 234 has a walking area based on the relative position of the mobile terminal 20 with respect to the plurality of fixed terminals 10 and the absolute position of the plurality of fixed terminals 10 included in the map information 345. The current location of the mobile terminal 20 in R can be accurately detected.

The display control unit 232 combines the map information 345 read from the storage unit 24 with the current location information of the mobile terminal 20 detected by the current location detection unit 234 to obtain a map of the walking area R including the user's current location information. , Can be displayed on the display unit 25.

Further, the mobile terminal 20 may be equipped with a camera function using a CMOS image sensor or the like. When the user takes a picture or a moving image at the tour point using the camera function, the current location information detected by the current location detection unit 234 is added as metadata to the acquired image data, and the image data and the metadata are added. Is associated and stored in the storage unit 24.

Further, when the existence notification information receiving unit 231 of the mobile terminal 20 receives the existence notification information transmitted from the existence notification information transmitting unit 131 of the fixed terminal 10 in which the danger information 346 is set, the display control unit 232 receives the ID. Based on the information 141, the danger information 346 corresponding to the fixed terminal 10 is read from the storage unit 24, and the danger information is displayed on the display unit 25. In this case, the display control unit 232 calculates the distance between the fixed terminal 10 and the current location of the mobile terminal 20 based on the current location information of the mobile terminal 20 detected by the current location detection unit 234, and the distance is predetermined. The danger information 346 may be displayed on condition that it is less than the threshold value of.

Further, when the existence notification information receiving unit 231 of the mobile terminal 20 receives the existence notification information transmitted from the existence notification information transmitting units 131 of the boundary terminals C01 to C08, the display control unit 232 moves to the outer edge boundary of the walking area R. A predetermined approach warning message for notifying the user that the user is approaching is displayed on the display unit 25. In this case, the display control unit 232 calculates the distance between the boundary terminals C01 to C08 and the current location of the mobile terminal 20 based on the current location information of the mobile terminal 20 detected by the current location detection unit 234, and the distance is calculated. An approach warning message is displayed on condition that the value is less than a predetermined threshold value.

<Effect>
According to the communication system 1 according to the present embodiment, the tour terminals D01 to D05 (first fixed terminals) for transmitting the existence notification information are arranged at the tour points in the walking area R, and the user is the mobile terminal 20. Take a walk in the walking area R while carrying. Then, the display control unit 232 of the mobile terminal 20 notifies the existence when the existence notification information receiving unit 231 of the mobile terminal 20 receives the existence notification information transmitted from the existence notification information transmitting units 131 of the tour terminals D01 to D05. Information reception The radio wave strength-related information of the radio wave is displayed on the display unit 25 of the mobile terminal 20. Therefore, the user can search for the direction of the tour point, which is the destination, by changing the direction of the directional antenna 21 of the mobile terminal 20 to find the direction in which the radio wave intensity is highest. In addition, the user can estimate how close he / she is to the tour point, which is the destination, by referring to the radio wave intensity related information displayed on the display unit 25. As a result, since it is not necessary to guide the tour guide and use the GPS navigation terminal, it is possible to provide the tour information to the user who walks in the walking area R at low cost. Moreover, since the user himself changes the direction of the directional antenna 21 to search for the destination, he is uplifting that he is exploring the walking area R by his own thoughts and judgments instead of being guided by the tour guide. A feeling can be given to the user.

Further, according to the communication system 1 according to the present embodiment, the distance calculation unit 233 calculates the distance between the tour terminals D01 to D05 and the mobile terminal 20, and the display control unit 232 uses the distance calculation unit 233. The calculated distance is displayed on the display unit 25. Therefore, the user can intuitively grasp the distance from the current location to the tour point which is the destination.

Further, according to the communication system 1 according to the present embodiment, a plurality of tour terminals D01 to D05 to which unique ID information 141 is assigned to each of them are arranged in the walking area R, and the display control unit 232 is arranged. Includes the ID information 141 included in the existence notification information received by the existence notification information receiving unit 231 in the radio wave intensity related information and displays it on the display unit 25. Therefore, even when a plurality of tour terminals D01 to D05 are designated by the user selecting a plurality of tour points as the destination, the user can refer to the ID information 141 displayed on the display unit 25. This makes it possible to accurately grasp the correspondence between a plurality of radio field strength-related information and a plurality of tour points.

Further, according to the communication system 1 according to the present embodiment, the storage unit 24 contains the ID information 141 of the selected tour terminals D02 and D03 selected from the plurality of tour terminals D01 to D05 as the selected terminal registration information 242. The display control unit 232 displays the radio wave intensity-related information of only the selected tour terminals D02 and D03 registered in the storage unit 24 among the plurality of tour terminals D01 to D05 on the display unit 25. Therefore, regarding the tour terminals D01, D04, and D05 corresponding to the tour points that the user has not selected as the destination, the radio field intensity related information is not displayed on the display unit 25, so that the display contents on the display unit 25 are simplified. can do. As a result, it is possible to improve the accessibility of necessary information by the user.

Further, according to the communication system 1 according to the present embodiment, the boundary terminals C01 to C08 (third fixed terminal) are arranged at the outer edge boundary of the walking area R, and the display control unit 232 has the boundary terminals C01 to C01 to. When the existence notification information receiving unit 231 receives the existence notification information transmitted from the existence notification information transmitting unit 131 possessed by C08, the warning information for notifying the approach to the outer edge boundary is displayed on the display unit 25. Therefore, it is possible to prevent the user from accidentally leaving the walking area R, and thus it is possible to reduce the risk of distress.

Further, according to the communication system 1 according to the present embodiment, the storage unit 24 of the mobile terminal 20 stores danger information 346 in the vicinity of the arrangement point of the fixed terminal 10. Then, when the display control unit 232 receives the existence notification information transmitted from the fixed terminal 10 in which the danger information 346 is set, the display control unit 232 reads the danger information 346 corresponding to the fixed terminal 10 from the storage unit 24. , The danger information 346 is displayed on the display unit 25. Therefore, since it is possible to provide the user with danger information 346 in the vicinity of the current location, it is possible to improve the safety of walking.

Further, according to the communication system 1 according to the present embodiment, the current location detection unit 234 detects the current location of the mobile terminal 20 based on the radio wave strength of the received radio wave of the existence notification information transmitted from the fixed terminal 10. Therefore, the user's current location can be detected by a low-cost method that does not use GPS. Further, the display control unit 232 displays the map information 345 read from the storage unit 24 and the information indicating the current location of the mobile terminal 20 detected by the current location detection unit 234 on the display unit 25. Therefore, the user can accurately grasp his / her current location in the walking area R by referring to the information displayed on the display unit 25.

Further, according to the communication system 1 according to the present embodiment, the transmission time interval in which the fixed terminal 10 repeatedly transmits the existence notification information can be set by the control terminal 30. Therefore, when the user is in the walking area R, the information can be provided to the user with high frequency by setting the transmission time interval short. On the other hand, when there is no user in the walking area R, the power consumption of the fixed terminal can be reduced by setting a long transmission time interval.

Further, according to the communication system 1 according to the present embodiment, a plurality of fixed terminals 10 are arranged in the walking area R, and the plurality of fixed terminals 10 form a network network for communication by wireless communication. do. Therefore, it is possible to construct a communication network that is easy to operate in the walking area R at low cost.

Further, according to the communication system 1 according to the present embodiment, the relay terminal 40 has at least one fixed terminal 10 included in the first fixed terminal group and at least one fixed terminal 10 included in the second fixed terminal group. The communication with the terminal 10 is relayed. In the vast walking area R, a first fixed terminal group and a second fixed terminal group in which a plurality of fixed terminals 10 cannot directly communicate due to the existence of a valley bottom or a river where the fixed terminals 10 cannot be arranged. It may be divided into. Even in such a case, the communication system 1 includes a relay terminal 40 for relaying communication between the first fixed terminal group and the second fixed terminal group, so that communication for all fixed terminals can be performed. It is possible to build a network that realizes.

<Emergency processing during a walk 1: Return request>
This will be described with reference to FIGS. 5 to 7. When the user wants to stop walking and return to the starting point (or a predetermined evacuation point) due to poor physical condition or urgent need, the user can input a predetermined return request from the input unit 26.

When the input unit 26 receives the return request, the display control unit 232 synthesizes the return route information 344 read from the storage unit 24 and the current location information of the mobile terminal 20 detected by the current location detection unit 234. The return route information including the user's current location information is displayed on the display unit 25. The user returns to the starting point by following the return route displayed on the display unit 25. In the walking area R, a plurality of route terminals B01 to B08 are arranged along the return route. When the existence notification information receiving unit 231 receives the existence notification information transmitted from the existence notification information transmitting units 131 possessed by the route terminals B01 to B08, the current location detection unit 234 receives the existence notification information based on the radio wave strength of the received radio wave of the existence notification information. Detects the current location of the mobile terminal 20. By densely arranging the plurality of route terminals B01 to B08 so that the communication with the mobile terminal 20 is not interrupted, the user can be safely guided to the departure point along the return route.

According to the communication system 1 according to the present embodiment, the current location detection unit 234 uses the mobile terminal 20 based on the radio wave intensity of the received radio wave of the existence notification information transmitted from the route terminals B01 to B08 (second fixed terminal). Detects your current location. Therefore, the user's current location can be detected by a low-cost method that does not use GPS. Further, when the input unit 26 receives the return request, the display control unit 232 displays the return route information 344 read from the storage unit 24 and the current location information of the mobile terminal 20 detected by the current location detection unit 234. Display on 25. Therefore, the user who has input the return request can safely return to the departure point by following the return route by referring to the information displayed on the display unit 25.

<Emergency processing during a walk 2: Rescue request>
This will be described with reference to FIGS. 2, 3, 5 to 7, 12, and 13. When the user desires rescue due to an incapacitated injury or the like, a predetermined rescue request can be input from the input unit 26.

When the input unit 26 receives the rescue request, the rescue request processing unit 235 transmits the rescue request information 347 toward the control terminal 30 from the directional antenna 21 via the communication unit 22. The rescue request information 347 includes the ID information 241 of the mobile terminal 20 read from the storage unit 24 and the current location information of the mobile terminal 20 detected by the current location detection unit 234.

When any of the fixed terminals 10 receives the rescue request information 347 by the omnidirectional antenna 11, the communication unit 134 of the fixed terminal 10 directs the received rescue request information 347 toward all the fixed terminals 10 in an omnidirectional manner. Transmission (for example, broadcast transmission) is performed from the sex antenna 11. Alternatively, when the communication route is specified, the communication unit 134 transmits the received rescue request information 347 to the fixed terminal 10 next to the communication route from the omnidirectional antenna 11 (for example, multicast transmission or). Unicast transmission). Similarly, the rescue request information 347 is sequentially transmitted by communication between the fixed terminals 10, and finally the control terminal 30 receives the rescue request information 347 by the omnidirectional antenna 31.

The rescue request processing unit 338 of the control terminal 30 stores the rescue request information 347 received by the communication unit 333 in the storage unit 34. The administrator starts the rescue activity of the user when the control terminal 30 receives the rescue request information 347.

In addition, instead of the above-mentioned aspect in which the current location information of the mobile terminal 20 detected by the current location detection unit 234 is included in the rescue request information 347, the following processing is performed on one or more fixed terminals 10 that have received the rescue request information 347 from the mobile terminal 20. May be executed. When the rescue request information 347 received from the mobile terminal 20 does not include the current location information of the mobile terminal 20, the rescue request processing unit 133 of the fixed terminal 10 receives its own ID information 141 read from the storage unit 14 and its own ID information 141. Information indicating the radio wave strength of the received radio wave when the fixed terminal 10 receives the rescue request information 347 from the mobile terminal 20 is added to the rescue request information 347. The communication unit 134 transmits the rescue request information 347 to which these information is added to all the fixed terminals 10 (for example, broadcast transmission), or transmits the rescue request information 347 to the next fixed terminal 10 of the communication route (for example). Multicast transmission or unicast transmission).

According to the communication system 1 according to the present embodiment, the mobile terminal 20 transmits the rescue request information 347 when the rescue request from the user is received, and the fixed terminal 10 transmits the rescue request transmitted from the mobile terminal 20. When the information 347 is received, the rescue request information 347 is communicated to the control terminal 30. Therefore, the administrator can grasp that there is a user requesting rescue by receiving the rescue request information 347 by the control terminal 30, and can immediately start the rescue operation.

Further, according to the communication system 1 according to the present embodiment, the rescue request information 347 includes the ID information 241 of the mobile terminal 20 that has transmitted the rescue request information 347. Therefore, the administrator who operates the control terminal 30 can grasp from which user the rescue request is made by the ID information 241 of the mobile terminal 20. Further, since a plurality of rescue requests can be distinguished by the ID information 241 of the mobile terminal 20, even if the rescue request information 347 is simultaneously transmitted from the plurality of mobile terminals 20, rescue activities are performed for each user. be able to.

Further, according to the communication system 1 according to the present embodiment, the rescue request information 347 includes the current location information of the mobile terminal 20 that has transmitted the rescue request information 347. Therefore, the administrator who operates the control terminal 30 can grasp the current location of the user who sent the rescue request from the rescue request information 347, so that the rescue operation can be smoothly performed.

Further, according to the communication system 1 according to the present embodiment, the rescue request information 347 includes the ID information 141 of the fixed terminal 10 that has received the rescue request information 347 from the mobile terminal 20 and the received radio wave of the rescue request information 347. Contains information about signal strength. Therefore, since the control terminal 30 can identify the current location of the user who sent the rescue request based on this information, the administrator can smoothly perform the rescue operation.

<Processing after walking>
This will be described with reference to FIGS. 5 and 11. When the user completes the walk and returns to the starting point, the control unit 23 of the mobile terminal 20 transfers the image data and metadata stored in the storage unit 24 from the directional antenna 21 via the communication unit 22. It is transmitted to the control terminal 30. The user can also add text data such as an observation record and transmit it from the mobile terminal 20 to the control terminal 30.

When the control unit 33 of the control terminal 30 receives the image data and metadata transmitted from the mobile terminal 20 by the omnidirectional antenna 31, the control unit 33 stores the image data and metadata in a database via the communication unit 38 and the communication network 39. Send to server 50. The database server 50 stores image data and metadata received from the control terminal 30. When text data such as an observation record is added, the database server 50 also stores the text data. The administrator and other users can acquire these data stored in the database server 50 via the communication network 39 and view them on their own smartphones or the like.

1 Communication system 10 Fixed terminal 11 Omnidirectional antenna 14, 24 Storage unit 21, 41A, 41B Directional antenna 25 Display unit 26 Input unit 30 Control terminal 40 Relay terminal 131, 331 Presence notification information transmission unit 132 Transmission interval processing unit 133 , 235,338 Rescue request processing unit 134,333 Communication unit 141,241,341 ID information 143,247,349 Program 231 Presence notification information reception unit 232,334 Display control unit 233 Distance calculation unit 234 Current location detection unit 236 Information reception unit 237 Selection processing unit 242 Selection terminal registration information 332 Transmission interval setting unit 335 Distance setting unit 336 Return route setting unit 337 Danger information setting unit 339 Map setting unit 340 Information transmission unit 343 Transmission interval information 344 Return route information 345 Map information 346 Danger information 347 Rescue request information 348 Distance conversion information

Claims (11)

One or more fixed terminals placed at a predetermined point in a predetermined walking area,
A mobile terminal carried by a user who walks in the walking area and
With
The fixed terminal is
With an omnidirectional antenna
A transmission unit that transmits presence notification information, which is information for notifying the existence of the fixed terminal, from the omnidirectional antenna.
Have,
The mobile terminal
With a directional antenna,
A receiving unit capable of receiving the presence notification information transmitted from the fixed terminal by the directional antenna, and
Display and
Display control unit and
Have,
The fixed terminal includes one or more first fixed terminals arranged at a tour point set in the walking area.
The display control unit is information related to the radio wave intensity of the received radio wave of the existence notification information when the receiving unit receives the existence notification information transmitted from the transmission unit of the first fixed terminal. A communication system that displays information related to radio field strength on the display unit. The mobile terminal
It further has a distance calculation unit that calculates the distance between the first fixed terminal and the mobile terminal based on the radio wave intensity.
The communication system according to claim 1, wherein the display control unit displays the distance calculated by the distance calculation unit as the radio wave intensity-related information on the display unit. The first fixed terminal is a plurality,
Unique identification information is assigned to each of the plurality of first fixed terminals.
The transmission unit of each of the plurality of first fixed terminals transmits the existence notification information including the identification information of itself.
The communication according to claim 1 or 2, wherein the display control unit includes the identification information included in the presence notification information received by the receiving unit in the radio wave intensity related information and displays it on the display unit. system. The mobile terminal
Further having a registration unit in which the identification information of one or more arbitrary first fixed terminals selected from the plurality of first fixed terminals is registered.
The third aspect of the present invention, wherein the display control unit displays the radio field intensity-related information of only the arbitrary first fixed terminal registered in the registration unit among the plurality of first fixed terminals on the display unit. The described communication system. The fixed terminal includes one or more second fixed terminals arranged in a return route set in the walking area.
The mobile terminal
A route information storage unit in which route information of the return route is stored, and
A return request input unit that receives a return request from a user who operates the mobile terminal, and a return request input unit.
When the receiving unit receives the existence notification information transmitted from the transmitting unit of the second fixed terminal, the current location of the mobile terminal is detected based on the radio wave strength of the received radio wave of the existence notification information. Current location detector and
Have more
When the return request input unit receives the return request, the display control unit includes the route information read from the route information storage unit and information indicating the current location of the mobile terminal detected by the current location detection unit. The communication system according to any one of claims 1 to 4, wherein is displayed on the display unit. The fixed terminal includes one or more third fixed terminals arranged at the outer edge boundary of the walking area.
When the receiving unit receives the presence notification information transmitted from the transmitting unit of the third fixed terminal, the display control unit provides warning information for notifying the approach to the outer edge boundary. The communication system according to any one of claims 1 to 5, which is displayed in. There are a plurality of fixed terminals,
The communication system according to any one of claims 1 to 6, wherein the plurality of fixed terminals form a network by wireless communication using the omnidirectional antenna. The network
A first fixed terminal group including the plurality of fixed terminals, and
A second fixed terminal group including a plurality of the fixed terminals and not including a fixed terminal capable of directly communicating with any of the fixed terminals included in the first fixed terminal group.
Have,
A claim further comprising a relay terminal that relays communication between at least one fixed terminal included in the first fixed terminal group and at least one fixed terminal included in the second fixed terminal group. 7. The communication system according to 7. Further equipped with a control terminal connected to the network
The mobile terminal
A rescue request input unit that receives a rescue request from a user who operates the mobile terminal,
When the rescue request input unit receives the rescue request, the rescue request transmission unit that transmits the rescue request and the rescue request transmission unit
Have more
The fixed terminal is
A rescue request receiving unit capable of receiving the rescue request transmitted from the mobile terminal, and
When the rescue request receiving unit receives the rescue request, the communication unit that communicates the rescue request toward the control terminal and the communication unit.
Have more,
The communication system according to claim 7 or 8. A mobile terminal that uses a communication system including one or more fixed terminals arranged at a predetermined point in a predetermined walking area.
With a directional antenna,
A receiving unit capable of receiving presence notification information transmitted from the omnidirectional antenna of the fixed terminal, which is information for notifying the existence of the fixed terminal, by the directional antenna.
Display and
Display control unit and
With
When the receiving unit receives the existence notification information transmitted from the fixed terminal, the display control unit obtains radio wave strength-related information which is information related to the radio wave strength of the received radio wave of the existence notification information. A mobile terminal that is displayed on the display. A computer mounted on a mobile terminal that uses a communication system having one or more fixed terminals arranged at a predetermined point in a predetermined walking area.
Receiving means capable of receiving presence notification information transmitted from the omnidirectional antenna of the fixed terminal, which is information for notifying the existence of the fixed terminal, by the directional antenna of the mobile terminal.
When the receiving means receives the presence notification information, the display control means for displaying the radio wave strength-related information, which is the information related to the radio wave strength of the received radio wave of the presence notification information, on the display unit of the mobile terminal. ,
A program to function as.

Images