JP6677334B2 - Terminal device, communication method, program - Google Patents

Description

  The present invention relates to communication technology, and more particularly, to a terminal device, a communication method, and a program for making a call for communication.

  It is desirable to be able to perform group communication for mobile stations located in a designated area without taking much time for setting the group communication. Therefore, each mobile station acquires its own location information by using the accompanying GPS (Global Positioning System) receiver. The control station transmits a paging signal of the group communication by adding area information of the mobile station to be subjected to the group communication. When the location information of the mobile station matches the area information of the call signal, the mobile station receives a group communication from the control station (for example, Patent Document 1).

JP 2009-177639 A

  Since position information is generally indicated by latitude and longitude, area information to be compared with the position information is also indicated by latitude and longitude. On the other hand, it is desirable that calling of group communication in a desired area be simpler.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a technique for easily executing a call to a mobile station located in a predetermined area.

  In order to solve the above-described problem, a terminal device according to an aspect of the present invention includes an obtaining unit that obtains position information, and transmitting the position information obtained by the obtaining unit to a calling device, and an area including the transmitted position information. A communication unit for receiving from the calling device a first identifier corresponding to the first identifier and a second identifier corresponding to the area to be called, and executing the communication when the first identifier and the second identifier received by the communication unit match. And a control unit that determines

  Still another embodiment of the present invention relates to a communication method. The method comprises the steps of acquiring location information, transmitting the acquired location information to a calling device, and a first identifier corresponding to an area containing the transmitted location information and a second identifier corresponding to an area to be called. From the calling device, and determining the execution of communication when the received first identifier and second identifier match.

  Still another preferred embodiment according to the present invention relates to a program. The program includes a step of acquiring position information, a step of transmitting the acquired position information to a calling device, a first identifier corresponding to an area including the transmitted position information, and a second identifier corresponding to an area to be called. Is received from the calling device, and when the received first identifier and second identifier match, the step of determining to execute communication is performed by the computer.

  Note that any combination of the above-described components and any conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, and the like are also effective as embodiments of the present invention.

  According to the present invention, a call to a mobile station located in a predetermined area can be easily executed.

FIG. 1 is a diagram illustrating a configuration of a communication system according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration of a base station device of FIG. 1. FIG. 3 is a diagram illustrating an area corresponding to a list stored in a storage unit in FIG. 2. FIG. 3 is a diagram illustrating a data structure of a list stored in a storage unit of FIG. 2. FIG. 3 is a diagram illustrating another data structure of a list stored in the storage unit of FIG. 2. FIG. 2 is a diagram illustrating a configuration of a terminal device of FIG. 1. FIG. 2 is a sequence diagram showing a communication procedure by the communication system of FIG. 1. FIG. 2 is a sequence diagram showing another communication procedure by the communication system of FIG. 1. FIG. 9 is a diagram illustrating a configuration of a base station device according to a second embodiment of the present invention. FIG. 8 is a sequence diagram illustrating a communication procedure by the communication system according to the second embodiment of the present invention. FIG. 9 is a diagram illustrating a configuration of a base station device according to a third embodiment of the present invention. FIG. 14 is a sequence diagram illustrating a communication procedure by the communication system according to the third embodiment of the present invention.

(Example 1)
Before describing the present invention in detail, an overview will first be given. Embodiment 1 Embodiment 1 of the present invention relates to a communication system compatible with business-use wireless communication. The commercial radio executes voice communication on a predetermined radio CH. One example of voice communication is PTT (Push to Talk). In PTT, a user presses a button at the start of a call and releases the button at the end of the call. In the case of business wireless, a group can be formed by a plurality of terminal devices. The commercial radio base station apparatus allocates an uplink channel and a downlink channel to the group. In such a situation, one terminal device in the group transmits a signal on the uplink channel, and another terminal device in the group receives the signal on the downlink channel. In calling such group communication, a plurality of terminal devices included in the group are called.

  However, there is a case where a user wants to call a terminal device existing in a specific place as a communication partner. For example, a fire breaks out in a building, a fire department headquarters reports a fire, and the headquarters sends a firefighter or police officer to the fire site with the person (s) closest to the site. You want to make a call. Even if the command headquarters could know the current location of each firefighter / cop through the GPS equipment owned by each person, to call only those who were near the site, the location of the site and who was nearby It takes time and effort to specify the Further, for example, it is assumed that the number of police officers who patrol more at night than at daytime is increased in an area where safety is reduced in the daytime but reduced in the nighttime. If a crime occurs at a certain place in the area at night, if all police officers in the area go to the crime scene, patrols other than the crime scene will be inadequate, so only the minimum necessary police officers will be I want to go to

  To cope with this, in the communication system according to the present embodiment, for example, a plurality of 1 km square areas are defined, and for each area, an identifier for specifying the area (hereinafter, referred to as “area No.”). Is given. The terminal device transmits the acquired position information to the base station device, and the base station device determines the area No. based on the position information. To identify. The terminal device receives the received area No. In their own area No. To be stored. The base station device transmits the specified area to the terminal device. Further, the base station apparatus sets the area No. corresponding to the area to be called. Is transmitted to a plurality of terminal devices. The terminal device transmits the area No. included in the call signal. Is their own area No. If it is the same, execute communication. Further, the base station apparatus changes the area and the area No. so as to change the size of the area in the list according to the time. Adjust the correspondence with.

  FIG. 1 shows a configuration of a communication system 100 according to the first embodiment of the present invention. The communication system 100 includes a command device 10, a network 12, a base station device 14, and a terminal device 16. The command device 10 is a communication device installed in the above-mentioned command unit, and is a communication device operated by a commander of the command unit. The instructor operates the instructing device 10 to execute a call to the terminal device 16 and to execute communication with the called terminal device 16, for example, a telephone call. At the time of calling, the command device 10 receives position information to be called. The position information is indicated by, for example, latitude and longitude.

  Here, the commander inputs the position information by inputting the latitude and longitude into the command device 10. Further, a display unit (not shown) provided in the command device 10 may display the map information, and the commander may select one point of the map information to input the position information. The command device 10 outputs a call request including position information (hereinafter, referred to as “call information”) to the base station device 14 via the network 12. The network 12 connects the command device 10 and the base station device 14. In FIG. 1, one base station device 14 is illustrated for clarity of description, but a plurality of base station devices 14 may be connected to the network 12.

  The base station device 14 is a base station device compatible with a business wireless system. Since a known technique may be used for the commercial radio, the description is omitted here. The base station device 14 is connected at one end to the terminal device 16 by business radio, and at the other end to the network 12. Upon receiving the call information from the network 12, the base station device 14 generates a signal for calling the terminal device 16 in the business wireless system (hereinafter, referred to as a "call signal"). The base station device 14 transmits a call signal to the terminal device 16. The transmission here corresponds to the notification. Note that at least one of the base station device 14 and the command device 10 may be collectively referred to as a “call device”.

  The terminal device 16 is a device that can execute communication by business wireless communication. The terminal device 16 is, for example, a communication device operated by a fireman / cop. The firefighter / cop executes a call with the command device 10 by operating the terminal device 16. The call is started after receiving a call signal from the base station device 14. In FIG. 1, one terminal device 16 is illustrated for clarity of description, but a plurality of terminal devices 16 may be connected to the base station device 14.

  FIG. 2 shows a configuration of the base station device 14. The base station device 14 includes an input unit 20, a storage unit 22, an adjustment unit 24, a first selection unit 26, a communication unit 28, a second selection unit 30, and a processing unit 32. The communication unit 28 includes a receiving unit 34, a first transmitting unit 36, and a second transmitting unit 38. The storage unit 22 stores an area and an area number. Is stored as a list including a plurality of correspondences with. Here, this list will be described with reference to FIG. FIG. 3 shows an area corresponding to the list stored in the storage unit 22. The predetermined area is divided into, for example, an area having a rectangular shape of 1 km square. Each area has an area No. as an identifier. Are given like “1”. The shape of the area is not limited to a rectangular shape, and may be any shape. The areas may overlap each other.

  FIG. 4 shows a data structure of the list stored in the storage unit 22. As shown, “area No.” and “area coordinates” are associated with each other. The area coordinates indicate the coordinates of two diagonal vertices in the area shown in FIG. If the length of one side of the rectangular shape is known, the area coordinates may be the center coordinates of the area. Note that the range of the jurisdiction of the command unit shown in FIG. 3 (jurisdiction range 200) indicates a range in which communication with the base station apparatus 14 is possible. Return to FIG.

  The adjustment unit 24 has a timekeeping function and acquires time. The adjustment unit 24 adjusts the correspondence between “area No.” and “area coordinates” included in the list stored in the storage unit 22 according to the time. For example, if the time is daytime (6:00 am to 6:00 pm), the adjustment unit 24 uses a list including an area having a rectangular shape of 1 km square and the list stored in the storage unit 22 as it is. Decide to use. On the other hand, if the time is nighttime (6:00 pm to 6:00 am), the adjustment unit 24 adjusts the list so that the area has a rectangular shape of 100 m square. At that time, the adjusting unit 24 sets the area No. Also change. The controller 24 may adjust the list according to the day of the week, the date of the month, the day elapsed from the beginning of the month, the surrounding illuminance, the atmospheric pressure (weather), the temperature, the humidity, the seismic intensity, the acceleration, the wind speed, the water level, and the like. .

  For example, in the base station device 14 or an external device, a sensor that measures illuminance, atmospheric pressure, temperature, humidity, seismic intensity, acceleration, wind speed, water level, and the like is installed, and the adjustment unit 24 acquires the sensor data, and You can adjust the list. Also, the command device 10 or the base station device 14 collects data from a plurality of sensors distributed and installed within the area of the command area (jurisdiction area 200), and adjusts the data based on the data obtained by summing the data. Unit 24 may adjust the list. Alternatively, the command device 10 or the base station device 14 may acquire various types of weather information from the outside, and the adjustment unit 24 may adjust the list based on the weather information. In addition, various sensors are built in the terminal device 16, and when transmitting the position information from the terminal device 16 to the base station device 14, the sensor data is also transmitted together. May be adjusted. For example, "When the atmospheric pressure becomes 990 hPa or less at 60% or more of the observation point (the position where the sensor is installed or the position where the terminal device 16 exists) in the coverage area of the base station device 14, the low pressure such as the typhoon Because approaching is assumed, the area of a high risk of disaster, such as a coast, river, or cliff, should be reduced in area (finely divided). " Further, the list may be adjusted using a rule in which a plurality of times and various sensor data are combined. That is, the adjustment unit 24 can adjust the list according to at least one of the time information, the calendar information, and the sensor information.

  Adjustments may be made in other ways. In that case, the storage unit 22 stores the area and the area number. A plurality of types of lists that include a plurality of correspondences with are stored. FIG. 5 shows another data structure of the list stored in the storage unit 22. As shown in the figure, the plurality of types of lists are represented as a first list and a second list, and each of them is provided with an identifier for identifying the list (hereinafter, referred to as “list No.”). . In each list, as in FIG. And the area coordinates are associated with each other. For example, the first list is a list for daytime (from 6:00 am to 6:00 pm), and the second list is a list for nighttime (from 6:00 pm to 6:00 am). Further, the area in the first list has a rectangular shape of 1 km square as described above, and the area in the second list has a rectangular shape of 100 m square. That is, each of the plurality of types of lists corresponds to an area having a different size. In that case, the adjustment unit 24 selects one of the plurality of types of lists stored in the storage unit 22 according to the time. For example, the controller 24 selects the first list if the time is from 6:00 am to 6:00 pm, and selects the second list if the time is from 6:00 pm to 6:00 am. Note that the above-mentioned daytime list and nighttime list are merely examples, and three or more lists may be used. Return to FIG.

  The communication unit 28 has a transmission / reception function of a business wireless system. Among them, the receiving unit 34 receives the position information from the terminal device 16. The communication unit 28 outputs the received position information to the first selection unit 26. The first selection unit 26 inputs the position information from the communication unit 28. The first selection unit 26 specifies an area including the input position information among a plurality of areas constituting the list adjusted by the adjustment unit 24. Further, the first selection unit 26 selects the area No. corresponding to the specified area. To identify. As described above, the first selection unit 26 determines from the list the area No. corresponding to the position information. Select The first selection unit 26 selects the area No. Is output to the first transmission unit 36. Hereinafter, an area No. determined according to the position information of the terminal device 16 will be described. May be referred to as “first area No.”.

  The first transmission unit 36 sends the area No. from the first selection unit 26. Enter The first transmitting unit 36 transmits the area No. Is transmitted to the terminal device 16 which is the terminal device 16 and the transmission source of the position information received by the communication unit 28. Here, the first transmission unit 36 sets the area No. until the input unit 20 described later inputs the call information. Send Further, the first transmission unit 36 outputs the area No. after the input unit 20 described later inputs the call information. May be transmitted. In the latter case, at the timing when the calling signal is transmitted, the area No. Is sent.

  The input unit 20 inputs call information from the command device 10 via a network 12 (not shown). As described above, since the call information includes the position information, the call information can be said to be information on an area to be called. For example, when “runaway” occurs in the area “5”, the position information included in the call information indicates the coordinates in the area “5”. When a “fire” occurs in the area “38”, the position information included in the call information indicates the coordinates in the area “38”. The input unit 20 outputs the call information to the second selection unit 30.

  The second selector 30 selects an area No. corresponding to the position information included in the call information from the list adjusted by the adjuster 24. Select As described above, if the position information is the coordinates in the area “5”, the second selecting unit 30 sets the area No. Select “5”. In addition, the second selection unit 30 outputs the area No. Not only “5” but also area No. Area No. around "5" May also be selected. The second selector 30 selects one or more selected area Nos. Is generated, and the calling signal is output to the second transmitting unit 38. Hereinafter, the area No. based on this call information will be described. May be referred to as a “second area No.”.

  The second transmission unit 38 inputs a call signal from the second selection unit 30. The second transmitting unit 38 transmits a calling signal. As described above, transmission here corresponds to notification. When the communication unit 28 receives a response signal to the call signal from one or more terminal devices 16 after transmitting the call signal, the processing unit 32 communicates with the one or more terminal devices 16 via the communication unit 28. Perform communication.

  This configuration can be realized in terms of hardware by a CPU, a memory, or other LSI of an arbitrary computer, and is realized in software by a program or the like loaded in the memory. The functional blocks are drawn. Therefore, it is understood by those skilled in the art that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  FIG. 6 shows a configuration of the terminal device 16. The terminal device 16 includes an acquisition unit 50, a control unit 56, a communication unit 58, and a processing unit 60. The acquisition unit 50 has a GPS positioning function, and periodically acquires the position information of the terminal device 16. Note that the positioning function of the acquisition unit 50 may correspond to a function other than the GPS. Here also, the position information is indicated by, for example, latitude and longitude. The acquisition unit 50 outputs the position information to the communication unit 58 via the control unit 56.

  The communication unit 58 performs communication with the base station device 14 by business wireless communication. When inputting the position information from the acquisition unit 50 via the control unit 56, the communication unit 58 transmits the position information to the base station device 14. After transmitting the position information, the communication unit 58 transmits the area No. from the base station device 14. To receive. The communication unit 58 transmits the received area No. (First area No.) is output to the control unit 56. Further, communication section 58 receives a call signal from base station apparatus 14. As described above, the calling signal includes the area No. to be called. It is included. The communication unit 58 transmits the area No. included in the call signal. (The second area No.) is input to the control unit 56.

  The control unit 56 sends the first area No. from the communication unit 58. And the second area No. Enter The control unit 56 controls both area Nos. If they match, execution of communication with the command device 10 via the base station device 14 and the network 12 is determined. The second area No. Are input, one of them and the first area No. are input. If the two match, the control unit 56 determines to execute communication. When the control unit 56 determines to execute communication, the communication unit 58 transmits a response signal to the base station device 14. Subsequently, the communication unit 58 and the processing unit 60 execute communication.

  The operation of the communication system 100 having the above configuration will be described. FIG. 7 is a sequence diagram showing a communication procedure by the communication system 100. The base station device 14 adjusts the list (S10). The terminal device 16 acquires the position information (S12), and transmits the position information to the base station device 14 (S14). The base station device 14 has the first area No. Is selected (S16), and the first area No. is selected. Is transmitted to the terminal device 16 (S18). The terminal device 16 has the first area No. Is set (S20). The command device 10 transmits the call information to the base station device 14 (S22). The base station device 14 has the second area No. Is selected (S24), and a calling signal is generated (S26). The base station device 14 has the second area No. Is transmitted (S28). If the terminal device 16 is in the first area No. And the second area No. Is confirmed (S30), the command device 10 and the terminal device 16 execute communication (S32).

  FIG. 8 is a sequence diagram showing another communication procedure by the communication system 100. The base station device 14 adjusts the list (S50). The terminal device 16 acquires the position information (S52), and transmits the position information to the base station device 14 (S54). The base station device 14 stores the position information (S56). The command device 10 transmits the call information to the base station device 14 (S58). The base station device 14 determines the first area No. based on the position information. Is selected (S60), and the first area No. is selected. Is transmitted to the terminal device 16 (S62). The terminal device 16 has the first area No. Is set (S64). The base station device 14 determines the second area No. based on the call information. Is selected (S66), and a call signal is generated (S68). The base station device 14 has the second area No. Is transmitted (S70). If the terminal device 16 is in the first area No. And the second area No. Is confirmed (S72), the command device 10 and the terminal device 16 execute communication (S74).

  According to the present embodiment, the area No. Is used to call a terminal device, so that a call to a predetermined area can be easily executed. An area No. for specifying the terminal device based on the position information from the terminal device. Is notified to the terminal device, so that the terminal device does not need to hold the list. In addition, since the terminal device does not hold the list, the configuration of the terminal device can be simplified. Also, if only the area to be called is specified, a call can be made, so that there is no need to find out who is in the area. Also, since there is no need to find out who is in the area, the time required for a call can be reduced.

  Also, since the list is adjusted, the list according to the situation can be used. Further, since any one of the plurality of types of lists is used while being switched, a list according to a situation can be used. Also, by switching the list, one area No. Since the size of the area covered by changes, the target range of the terminal device that can be called can be changed. Therefore, it is possible to set the size of the area where only the minimum necessary number of police officers can be called according to the time zone. Before transmitting the calling signal, the area No. Is transmitted in advance, so that a margin can be given to the processing period in the terminal device. When transmitting the calling signal, the area No. Is transmitted, an increase in traffic volume can be suppressed.

(Example 2)
Next, a second embodiment will be described. In the second embodiment, as in the past, the wireless communication system for business use corresponds to the area number. And a communication system for calling a terminal device. The base station device according to the third embodiment also adjusts the list according to a predetermined condition. Here, the list is adjusted so that the size of the area is changed according to the type of the event that has occurred. The communication system 100 and the terminal device 16 according to the second embodiment are of the same type as those in FIGS. Here, the difference will be mainly described.

  FIG. 9 shows a configuration of the base station device 14 according to the second embodiment of the present invention. The base station device 14 includes an input unit 20, a storage unit 22, an adjustment unit 24, a first selection unit 26, a communication unit 28, a second selection unit 30, a processing unit 32, and a reception unit 40. The communication unit 28 includes a receiving unit 34, a first transmitting unit 36, and a second transmitting unit 38. The storage unit 22 stores the list as before. Note that the storage unit 22 may store a plurality of types of lists.

  The receiving unit 40 receives an instruction to change the size of the area (hereinafter, referred to as “list information”) from the command device 10. Here, the commander operating the command device 10 directly specifies the area to be changed. For example, an area in which an event has occurred is designated, the area is divided into four, and a new area No. is assigned to each divided area. Is given. The divided area and the newly assigned area No. Is input to the receiving unit 40 as list information. The area to be divided is not limited to one, but may be plural. Furthermore, after the commander designates one area, an area nearby (adjacent area) may be divided at a time, or the commander may designate a plurality of areas. Alternatively, a process may be performed in which a plurality of areas are designated and those areas are combined into one area.

  On the other hand, when the storage unit 22 stores a plurality of lists, the commander selects a list to be used according to the content of the event, and inputs the selected list to the command device 10. Information about the selected list is input to the receiving unit 40 as list information. For example, an identifier (list No.) for identifying a plurality of lists can be used as list information. The receiving unit 40 outputs the list information to the adjusting unit 24.

  The adjustment unit 24 inputs the list information from the reception unit 40. The adjusting unit 24 adjusts the list according to the list information. Adjustment of the list includes selection of the list. Subsequent processing of the base station device 14 and the terminal device 16 are the same as those described above, and a description thereof will be omitted.

  The operation of the communication system 100 having the above configuration will be described. FIG. 10 is a sequence diagram illustrating a communication procedure by the communication system 100 according to the second embodiment of the present invention. The command device 10 transmits the list information to the base station device 14 (S90). The base station device 14 adjusts the list (S92). The terminal device 16 acquires the position information (S94) and transmits the position information to the base station device 14 (S96). The base station device 14 has the first area No. Is selected (S98), and the first area No. is selected. Is transmitted to the terminal device 16 (S100). The terminal device 16 has the first area No. Is set (S102). The command device 10 transmits the call information to the base station device 14 (S104). The base station device 14 has the second area No. Is selected (S106), and a calling signal is generated (S108). The base station device 14 has the second area No. Is transmitted (S110). If the terminal device 16 is in the first area No. And the second area No. Is confirmed (S112), the command device 10 and the terminal device 16 execute communication (S114).

  According to the present embodiment, the list is adjusted according to the received list information, so that a list reflecting the commander's will can be used. In addition, since a list reflecting the commander's will is used, only people near the site can be called. In addition, since only people near the site are called, it is possible to avoid calling a large number of people uselessly. In addition, the area No. depends on the type of the event that has occurred. To change the range, the call to the minimum required partner can be enabled. In addition, since it is possible to call the minimum necessary number of parties, it is possible to avoid useless movements (such as an unnecessary person rushing to the site).

(Example 3)
Next, a third embodiment will be described. The third embodiment corresponds to the business wireless communication as in the past, and the area No. And a communication system for calling a terminal device. The base station device according to the third embodiment also adjusts the list according to a predetermined condition. Here, in particular, the list is adjusted so that the size of the area is changed according to the density of the terminal devices. If a crime occurs in a certain place and you want to send police to it, if there are many police officers near the crime place, it is better to make the area near the crime place small and call only the nearest police officer preferable. On the other hand, when the number of police officers existing near the crime occurrence place is small, it is possible to call the police officers present to a certain extent by increasing the area near the crime occurrence place. It is preferable to be able to secure the response even in a large area (even if the pinpoint accuracy is reduced), rather than there being no policeman in the desired area and no response. The communication system 100 and the terminal device 16 according to the third embodiment are of the same type as those in FIGS. Here, the difference will be mainly described.

  FIG. 11 illustrates a configuration of the base station device 14 according to the third embodiment of the present invention. The base station device 14 includes an input unit 20, a storage unit 22, an adjustment unit 24, a first selection unit 26, a communication unit 28, a second selection unit 30, a processing unit 32, and a counting unit 42. The communication unit 28 includes a receiving unit 34, a first transmitting unit 36, and a second transmitting unit 38. The counting unit 42 counts the number of the terminal devices 16 connected to the base station device 14 over a predetermined period. Here, the counting may be performed for each area or for each area group in which a plurality of areas are put together. Therefore, the counted number of terminal devices 16 can be said to be the density in the area or the area group. Hereinafter, each area will be described for the sake of clarity. The counting unit 42 outputs the result of the counting to the adjustment unit 24. The storage unit 22 stores the list as before. Note that the storage unit 22 may store a plurality of types of lists.

  The adjustment unit 24 adjusts the list stored in the storage unit 22 so that the size of the area according to the result of the counting by the counting unit 42 is obtained. For example, when the density is high, the adjustment unit 24 divides the area in the list stored in the storage unit 22. Furthermore, after dividing a 1 km square area into 100 m square areas, if the density of a specific area increases, the area is further subdivided (for example, 50 m square). As described above, the change of the area size according to the density may be repeated a plurality of times. On the other hand, when the density is low, the adjustment unit 24 merges the areas in the list stored in the storage unit 22. For example, when the terminal device 16 does not exist at all in a certain 1 km square area (area A) and the terminal device 16 exists in an adjacent area (area B), the area A and the area B are merged. One area No. To call both areas. The area may be enlarged by repeating such a merging process a plurality of times.

  When the storage unit 22 stores a plurality of types of lists, the adjustment unit 24 selects a list corresponding to the size of the area according to the counting result. For example, when the number of the terminal devices 16 for a certain area is equal to or more than the first threshold, the adjustment unit 24 selects a list in which the area becomes smaller, and the number of the terminal devices 16 becomes the second threshold. If the value is equal to or less than the value, a list that increases the area is selected. Subsequent processing of the base station device 14 and the terminal device 16 are the same as those described above, and a description thereof will be omitted.

  The operation of the communication system 100 having the above configuration will be described. FIG. 12 is a sequence diagram illustrating a communication procedure by the communication system 100 according to the third embodiment of the present invention. The base station device 14 counts the number of the terminal devices 16 (S130). The base station device 14 adjusts the list (S132). The terminal device 16 acquires the position information (S134) and transmits the position information to the base station device 14 (S136). The base station device 14 has the first area No. Is selected (S138), and the first area No. is selected. Is transmitted to the terminal device 16 (S140). The terminal device 16 has the first area No. Is set (S142). The command device 10 transmits the call information to the base station device 14 (S144). The base station device 14 has the second area No. Is selected (S146), and a calling signal is generated (S148). The base station device 14 has the second area No. Is transmitted (S150). If the terminal device 16 is in the first area No. And the second area No. Is confirmed (S152), the command device 10 and the terminal device 16 execute communication (S154).

  According to the present embodiment, since the size of the area is changed according to the number of terminal devices, an efficient call can be realized. In addition, since efficient calling is realized, useless calling can be suppressed. Further, even when the size of the area changes, the processing of the terminal device is the same, so that the processing of the terminal device can be simplified.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to the combination of each component and each processing process, and that such modifications are also within the scope of the present invention. .

  According to the present embodiment, the communication system 100 uses business radio. However, the present invention is not limited to this. For example, a wireless communication system other than the commercial wireless communication may be used. According to this embodiment, the degree of freedom of the configuration can be improved.

  In the first to third embodiments, the area No. Is selected, the list is adjusted, and the list is stored in the base station device 14. However, the present invention is not limited to this, and for example, at least one of these processes may be performed in the combination of the command device 10 and the base station device 14 or in the command device 10. According to this modification, the degree of freedom of the configuration can be improved.

  Reference Signs List 10 command device, 12 network, 14 base station device, 16 terminal device, 20 input unit, 22 storage unit, 24 adjustment unit, 26 first selection unit, 28 communication unit, 30 second selection unit, 32 processing unit, 34 reception Unit, 36 first transmission unit, 38 second transmission unit, 100 communication system.

Claims (5)

An acquisition unit for acquiring location information;
Communication for transmitting the position information acquired by the acquisition unit to a calling device, and receiving, from the calling device, a first identifier corresponding to an area including the transmitted position information and a second identifier corresponding to an area to be called. Department and
A control unit that determines execution of communication when the first identifier and the second identifier received by the communication unit match,
A terminal device comprising: The area corresponding to the first identifier and the area corresponding to the second identifier received by the communication unit are adjusted in the calling device in accordance with at least one of time information, calendar information, and external sensor information. Area
The terminal device according to claim 1, wherein: The communication unit is wirelessly connected to the calling device, and the area corresponding to the first identifier and the area corresponding to the second identifier received by the communication unit are determined according to the number of terminal devices connected to the calling device. An area adjusted in the calling device,
The terminal device according to claim 1, wherein: Obtaining location information;
Transmitting the acquired position information to the calling device, and receiving, from the calling device, a first identifier corresponding to the area including the transmitted position information and a second identifier corresponding to the area to be called;
Deciding to execute communication when the received first identifier and second identifier match,
A communication method comprising: Obtaining location information;
Transmitting the acquired position information to the calling device, and receiving, from the calling device, a first identifier corresponding to the area including the transmitted position information and a second identifier corresponding to the area to be called;
Determining the execution of communication when the first identifier and the second identifier received match each other.

Images