JP6690754B2 - Calling device, calling method, program - Google Patents

Description

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

  It is desirable to be able to perform group communication for mobile stations located in a designated area without taking time to set up group communication. Therefore, each mobile station acquires its own location information by an incidental GPS (Global Positioning System) receiving device. The control station adds the area information of the mobile station that is the target of the group communication and transmits a call signal for the group communication. The mobile station receives the group communication from the control station when the position information of the mobile station and the area information of the calling signal match (for example, Patent Document 1).

JP, 2009-177639, A

  Since the position information is generally indicated by latitude and longitude, the area information 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 is simpler.

  The present invention has been made in view of such circumstances, and an object thereof 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 problems, a calling device according to an aspect of the present invention includes an input unit that acquires calling information including position information, and a storage unit that stores a list including a correspondence relationship between an area and an identifier, A selection unit that selects an identifier based on the position information acquired by the input unit and the areas included in the list stored in the storage unit, and that generates a ringing signal including the selected identifier; and the generated ringing signal to the terminal. And a communication unit for transmitting to the device.

  Another aspect of the present invention is a calling method. This method is based on the steps of obtaining call information including location information, storing a list containing a correspondence relationship between areas and identifiers, and obtaining location information and areas included in the stored list. Selecting the identifier and generating a ringing signal including the selected identifier, and transmitting the generated ringing signal to the terminal device.

  Yet another aspect of the present invention is a program. This program is based on the steps of acquiring call information including position information, storing a list containing the correspondence between areas and identifiers, and acquiring the position information and the areas included in the stored list. And causing the computer to perform the steps of generating a call signal including the selected identifier and transmitting the generated call signal to the terminal device.

  It should be noted that any combination of the above constituent elements and one obtained by converting the expression of the present invention among methods, devices, systems, recording media, computer programs, etc. are also effective as an aspect of the present invention.

  According to the present invention, it is possible to easily call a mobile station located in a predetermined area.

It is a figure which shows the structure of the communication system which concerns on Example 1 of this invention. It is a figure which shows the structure of the base station apparatus of FIG. It is a figure which shows the area corresponding to the list memorize | stored in the memory | storage part of FIG. It is a figure which shows the data structure of the list memorize | stored in the memory | storage part of FIG. It is a figure which shows the structure of the terminal device of FIG. It is a sequence diagram which shows the communication procedure by the communication system of FIG. 6 is a flowchart showing a communication procedure by the terminal device of FIG. 5. It is a figure which shows the structure of the base station apparatus which concerns on Example 2 of this invention. It is a figure which shows the data structure of the list memorize | stored in the memory | storage part of FIG. It is a sequence diagram which shows the communication procedure by the communication system which concerns on Example 2 of this invention. It is a figure which shows the structure of the base station apparatus which concerns on Example 3 of this invention. It is a sequence diagram which shows the communication procedure by the communication system which concerns on Example 3 of this invention. It is a figure which shows the structure of the base station apparatus which concerns on Example 4 of this invention. It is a sequence diagram which shows the communication procedure by the communication system which concerns on Example 4 of this invention. It is a sequence diagram which shows the communication procedure by the communication system which concerns on Example 5 of this invention.

(Example 1)
Before specifically explaining the present invention, an outline will be given. The first embodiment of the present invention relates to a communication system compatible with commercial wireless. The commercial radio executes voice communication on a predetermined wireless CH. An 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 a call. Further, in the commercial radio, it is possible to form a group with a plurality of terminal devices. The commercial wireless base station device allocates an uplink channel and a downlink channel to a group. In such a situation, one terminal device in the group transmits a signal in the uplink channel, and another terminal device in the group receives the signal in the downlink channel. In the call of such group communication, a plurality of terminal devices included in the group are called.

  However, there is a case where the user wants to call a terminal device existing in a specific place as a communication partner. For example, if a fire broke out in a building and the fire department command received a fire report, and the command station dispatched firefighters / cops to the fire site, with the person (s) closest to the site. This is the case when you want to make a call. Even if the headquarters can grasp the current position of each firefighter / cop, through the GPS device possessed by each person, in order to call out only those who are near the site, who is near the site and who is nearby? It is troublesome because the work to specify is required. In order to deal with this, in the communication system according to the present embodiment, for example, a plurality of areas of 1 km square are defined, and an identifier for identifying each area (hereinafter, referred to as “area No.”). Is given. Each terminal device has its own area No. based on the acquired position information. Recognize. The base station device determines the area No. corresponding to the area to be called. Is transmitted to a plurality of terminal devices. The terminal device determines the area number included in the calling signal. Own area number. If the same as, the communication is executed.

  FIG. 1 shows the 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 center, and is a communication device operated by a commander of the command center. The commander operates the command device 10 to call the terminal device 16 and also communicate with the called terminal device 16, for example, call. At the time of calling, the command device 10 receives the position information to be called. The position information is indicated by latitude and longitude, for example.

  Here, the commander inputs the position information by inputting the latitude and longitude to the command device 10. Alternatively, the 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. Although one base station device 14 is shown in FIG. 1 for the sake of clarity, 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 commercial wireless system. A publicly known technique may be used for the commercial radio, and thus the description thereof is omitted here. The base station device 14 is connected to the terminal device 16 by a commercial radio at one end side, and is connected to the network 12 at the other end side. When the call information from the network 12 is input, the base station device 14 generates a signal for calling the terminal device 16 (hereinafter, referred to as “call signal”) in the business wireless system. The base station device 14 transmits a calling signal to the terminal device 16. The transmission here corresponds to the notification. At least one of the base station device 14 and the command device 10 may be collectively referred to as a “calling device”.

  The terminal device 16 is a device capable of executing communication by business wireless. The terminal device 16 is, for example, a communication device operated by a firefighter / cop. The firefighter / cop will operate the terminal device 16 to make a call with the command device 10. The call is started after receiving the calling signal from the base station device 14. Although one terminal device 16 is shown in FIG. 1 for the sake of clarity, a plurality of terminal devices 16 may be connected to the base station device 14.

  FIG. 2 shows the configuration of the base station device 14. The base station device 14 includes an input unit 20, a storage unit 22, a selection unit 24, a communication unit 26, and a processing unit 28. The communication unit 26 also includes a transmission unit 30. The storage unit 22 stores areas and area numbers. A list containing a plurality of correspondences with is stored. Here, this list will be described with reference to FIG. FIG. 3 shows the areas corresponding to the list stored in the storage unit 22. The predetermined area is divided into, for example, areas each having a rectangular shape of 1 km square. In addition, each area has an area number, which is an identifier. Is given such as "1". The shape of the area is not limited to the rectangular shape and may be any shape. Also, the areas may overlap with each other.

  FIG. 4 shows the data structure of the list stored in the storage unit 22. As shown in the figure, "area No." and "area coordinate" are associated with each other. Area coordinates indicate the coordinates of two diagonal vertices in the area shown in FIG. When the length of one side of the rectangular shape is known, the area coordinates may be the center coordinates of the area. The range of the jurisdiction area of the headquarters (jurisdiction range 200) shown in FIG. 3 indicates a range in which communication with the base station device 14 is possible. Returning to FIG.

  The input unit 20 inputs call information from the command device 10 via the 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 the area to be called. For example, when a "run-away" 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 selection unit 24.

  The selection unit 24 inputs the call information from the input unit 20. The selection unit 24 selects the area No. corresponding to the position information included in the call information from the list stored in the storage unit 22. Select. As described above, if the position information is the coordinates within the area “5”, the selection unit 24 determines that the area number. Select "5". In addition, the selection unit 24 displays the area number. Not only "5" but area No. Area No. around "5" May also be selected. The selection unit 24 selects one or more selected area numbers. Generates a calling signal including the signal and outputs the calling signal to the transmitting unit 30.

  The communication unit 26 has a transmission / reception function of a commercial wireless system. Among them, the transmitting unit 30 inputs the calling signal from the selecting unit 24. The transmitter 30 transmits a calling signal. As described above, the transmission here corresponds to the notification. When the communication unit 26 receives a response signal to the calling signal from the one or more terminal devices 16 after transmitting the calling signal, the processing unit 28 communicates with the one or more terminal devices 16 via the communication unit 26. Execute communication.

  In terms of hardware, this configuration can be implemented by a CPU, memory, or other LSI of an arbitrary computer, and in terms of software, it is implemented by a program loaded in the memory, but here, it is implemented by linking them. It depicts the functional blocks that will be used. Therefore, it will be understood by those skilled in the art that these functional blocks can be realized in various forms by only hardware, only software, or a combination thereof.

  FIG. 5 shows the configuration of the terminal device 16. The terminal device 16 includes an acquisition unit 50, a storage unit 52, a selection unit 54, a control unit 56, a communication unit 58, and a processing unit 60. The acquisition unit 50 has a positioning function by GPS and periodically acquires the position information of the terminal device 16. The positioning function included in the acquisition unit 50 may correspond to a function other than GPS. Here again, the position information is indicated by latitude and longitude, for example. The acquisition unit 50 outputs the position information to the selection unit 54.

  The storage unit 52 stores the area and the area No. containing the position information that can be acquired by the acquisition unit 50. A list containing a plurality of correspondences with is stored. This list is the same as the list stored in the storage unit 22 of FIG. 2, that is, the list shown in FIG. That is, the terminal device 16 and the base station device 14 hold a common list. The selection unit 54 selects the area No. corresponding to the position information acquired by the acquisition unit 50 from the list stored in the storage unit 52. Select. Below, the area No. determined according to this position information. May be referred to as “first area No.”. The selection unit 54 selects the selected area number. Is output to the control unit 56. The area No. selected in the selection unit 54 is May be transmitted from the communication unit 58 to the base station device 14 and the command device 10.

  The communication unit 58 executes communication with the base station device 14 by commercial radio. The communication unit 58 receives the calling signal from the base station device 14. As described above, the calling signal includes the area No. to be called. It is included. In the following, the area No. included in this calling signal will be described. May be referred to as “second area No.”. The communication unit 58 displays the area No. included in the calling signal. Is input to the control unit 56.

  The control unit 56 controls the area No. from the communication unit 58. And the area number from the selection unit 54. Enter. The control unit 56 controls both area numbers. If they match, it determines to execute communication with the command device 10 via the base station device 14 and the network 12. In addition, from the communication unit 58, a plurality of area numbers. Is input, one of them and the area No. from the selection unit 54 are input. When and match, the control unit 56 determines to execute communication. When the control unit 56 determines to execute the communication, the communication unit 58 transmits a response signal to the base station device 14. Following this, 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. 6 is a sequence diagram showing a communication procedure by the communication system 100. The terminal device 16 acquires the position information (S10). The terminal device 16 uses the area number. Is selected (S12). The command device 10 transmits the call information to the base station device 14 (S14). The base station device 14 uses the area number. Is selected (S16) and a calling signal is generated (S18). The base station device 14 transmits a calling signal (S20). If the terminal device 16 is the area number. If the coincidence is confirmed (S22), the command device 10 and the terminal device 16 execute communication (S24).

  FIG. 7 is a flowchart showing a communication procedure by the terminal device 16. The acquisition unit 50 acquires position information (S40). The selection unit 54 displays the area number. Is selected (S42). If the communication unit 58 does not receive the calling signal (N of S44), it stands by. When the communication unit 58 receives the calling signal (Y in S44), the area number. If they match (Y in S46), the communication unit 58 and the processing unit 60 execute communication (S48). Area No. Does not match (N of S46), step 48 is skipped.

  According to this embodiment, the area number. Since the terminal device is called by using, it is possible to easily call the predetermined area. Area No. selected from the list stored in the storage unit. Area No. included in the call signal. And area No. It can be completed only by receiving the ringing signal including. Area No. Since it is only necessary to receive the ringing signal containing the, traffic volume can be reduced. Also, it is possible to make a call by specifying only the area you want to call, so you do not need to find out who is in the area. Also, since it is not necessary to find out who is in the area, it is possible to shorten the time to reach a call.

  In addition, the terminal device displays the area No. corresponding to the position information. Area No. Therefore, communication with the base station device can be eliminated. Further, since communication with the base station device is unnecessary, the traffic volume in the wireless section can be reduced. In addition, the amount of data transmitted from the base station device to the terminal device can be reduced.

(Example 2)
Next, a second embodiment will be described. The second embodiment, like the first embodiment, corresponds to the commercial wireless, and the area number. The present invention relates to a communication system for calling a terminal device. The base station device and the terminal device according to the second embodiment hold a plurality of lists, and select and use one common list according to predetermined conditions. This is because, for example, it is assumed that the number of police officers patrolling at night increases rather than at daytime in an area that is safe during the daytime but is less safe at night. If a crime occurs at a certain place in the area at night, if all the police officers in the area go to the crime scene, the patrols other than the crime scene will be overwhelmed. I want to go to. The communication system 100 and the terminal device 16 according to the second embodiment are the same types as those in FIGS. 1 and 5. Here, the difference will be mainly described.

  FIG. 8 shows the 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, a communication unit 26, a processing unit 28, a first selection unit 32, and a second selection unit 34. The communication unit 26 also includes a transmission unit 30.

  The storage unit 22 stores a plurality of types of lists. FIG. 9 shows the data structure of the list stored in the storage unit 22. As shown in the figure, a plurality of types of lists are shown as a first list and a second list. In each list, as in FIG. And area coordinates are associated with each other. For example, the first list is a list for daytime (6:00 am to 6:00 pm), and the second list is a list for nighttime (6:00 pm to 6:00 am). Also, the area in the first list has a rectangular shape of 1 km square, 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 areas of different sizes. The daytime list and nighttime list described above are merely examples, and three or more lists may be used. Returning to FIG.

  The 1st selection part 32 has a timekeeping function, and acquires time. The first selection unit 32 selects one of the plurality of types of lists stored in the storage unit 22 according to the time. That is, the first selection unit 32 selects any one of the plurality of types of lists stored in the storage unit 22 according to a predetermined rule regarding time (list selection rule). For example, the first selection unit 32 selects the first list when the time is 6:00 am to 6:00 pm, and selects the second list when the time is 6:00 pm to 6:00 am. The second selection unit 34 inputs the call information from the input unit 20. The second selection unit 34 selects the area No. corresponding to the position information included in the call information from the list selected by the first selection unit 32. Select. The selection may be made in the same manner as the selection unit 24. The second selection unit 34 selects one or more selected area numbers. Generates a calling signal including the signal and outputs the calling signal to the transmitting unit 30.

  In the terminal device 16 of FIG. 5, the storage unit 52 stores a plurality of types of lists. This list is the same as the list stored in the storage unit 22 of FIG. The selection unit 54 switches and uses one of the plurality of types of lists stored in the storage unit 52. Similar to the first selection unit 32, the selection unit 54 has a time counting function and acquires time. The selection unit 54 selects one of the plurality of types of lists stored in the storage unit 52 according to the time. That is, the selection unit 54 selects any one of the plurality of types of lists stored in the storage unit 52 according to a predetermined time-related rule (list selection rule). The same rule is used in the first selection unit 32 and the selection unit 54. Therefore, even if there is no instruction from the base station apparatus 14, the selection unit 54 autonomously executes the switching so that the same list as the list used in the base station apparatus 14 is used. A time synchronization function may be provided to reduce an error between the time counting function of the first selection unit 32 and the time counting function of the selection unit 54. Further, the rules used in the first selecting unit 32 and the selecting unit 54 are not limited to the rules relating to the time, and other rules may be used.

  For example, the selection unit 54 and the first selection unit 32 may switch the list according to the day of the week, the date of the month, the days elapsed from the beginning of the month, the ambient illuminance, the atmospheric pressure (weather), the temperature, the humidity, and the like. For example, the terminal device 16 has a built-in sensor (not shown) that measures illuminance, atmospheric pressure, temperature, humidity, etc., and the selection unit 54 acquires the sensor data and stores it in the storage unit 52 accordingly. Any one of a plurality of types of list may be selected. In this case, the same sensor as the sensor built in the terminal device 16 is installed in the base station device 14 or an external device, and the first selection unit 32 uses the data to select the list. In addition, the command device 10 or the base station device 14 collects data from a plurality of sensors installed in a distributed manner within the range of the jurisdiction of the headquarters (jurisdiction range 200), and based on the data obtained by collecting the data, The 1-selection unit 32 may select the list. Alternatively, the command device 10 or the base station device 14 may acquire various weather information from the outside to estimate sensor data in the terminal device 16, and the first selection unit 32 may select the list according to the estimated value. Alternatively, the sensor data stored in the terminal device 16 may be transmitted from the terminal device 16 to the base station device 14, and the first selection unit 32 may select the list according to the data. For example, "When the atmospheric pressure is below 990 hectopascals, a low pressure such as a typhoon is expected to approach, so the area of the area with a high risk of disasters such as the coast, rivers, and cliffs has a small area (fine division). A list is selected in each of the terminal device 16 and the base station device 14 according to a common rule such as "select". Further, the list may be selected using a rule in which a plurality of times and various sensor data are combined. That is, the selection unit 54 and the first selection unit 32 can select the list according to at least one of time information, calendar information, and sensor information. Further, the selection unit 54 selects the area No. corresponding to the position information acquired by the acquisition unit 50 from the selected list. Select. The selection unit 54 selects the selected area number. Is output to the control unit 56.

  The operation of the communication system 100 having the above configuration will be described. FIG. 10 is a sequence diagram showing a communication procedure by the communication system 100 according to the second embodiment of the present invention. The terminal device 16 acquires the position information (S60). The base station device 14 selects the list (S62), and the terminal device 16 also selects the list (S64). The terminal device 16 uses the area number. (First area No.) is selected (S66). The command device 10 transmits the call information to the base station device 14 (S68). The base station device 14 uses the area number. (Second area No.) is selected (S70) and a calling signal is generated (S72). The base station device 14 transmits a calling signal (S74). If the terminal device 16 is in the first area No. And the second area No. If the coincidence is confirmed (S76), the command device 10 and the terminal device 16 execute communication (S78).

  According to the present embodiment, any one of the plurality of types of lists is used while being switched, so that the list can be used according to the situation. Further, since the base station device 14 and the terminal device 16 each perform the list switching autonomously using the common list selection rule, communication with the base station device for switching the list can be eliminated. Further, since communication with the base station device for switching the list is unnecessary, the traffic volume can be reduced. Further, since the base station device stores a plurality of lists, the lists can be changed according to predetermined conditions. Also, by switching the list, one area number. Since the size of the area covered by is changed, the target range of the callable terminal device can be changed. Therefore, the size of the area where only the minimum necessary police officers can be called can be set according to the time of day.

(Example 3)
Next, a third embodiment will be described. The third embodiment corresponds to the commercial radio as in the past, and the area No. The present invention relates to a communication system for calling a terminal device. The base station device and the terminal device in the third embodiment also hold a plurality of lists, and select and use one common list according to predetermined conditions. Here, in particular, in order to change the size of the area according to the type of event that has occurred, the list is switched according to the type of event that has occurred, for example, an event that 100 people gather, an event that 1000 people gather, and the like. The communication system 100 and the terminal device 16 according to the third embodiment are the same types as those in FIGS. 1 and 5. Here, the difference will be mainly described.

  FIG. 11 shows the 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, a communication unit 26, a processing unit 28, a first selection unit 32, a second selection unit 34, and a reception unit 36. The communication unit 26 also includes a transmission unit 30. The storage unit 22 stores a plurality of types of lists. As shown in FIG. 9, an identifier for identifying the list (hereinafter, referred to as “list No.”) is added to each list. Here again, the size of the area differs for each list. Areas of different sizes may be combined in one list.

  The receiving unit 36 receives an instruction to change the size of the area (hereinafter, referred to as “list information”) from the command device 10. The list information includes the list No. Includes information to identify the. Here, the commander of the command center 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 output from the command device 10 as list information. The reception unit 36 outputs the list information to the first selection unit 32.

  The first selection unit 32 inputs the list information from the reception unit 36. The first selection unit 32 displays the list No. corresponding to the list information. From the storage unit 22. The first selection unit 32 selects the selected list No. Is output to the transmission unit 30. The transmission unit 30 transmits the list No. from the first selection unit 32. Enter the list number. To send. In the second selection unit 34, the transmission unit 30 sets the list No. After transmitting, the call information is input from the input unit 20. The second selection unit 34 selects the area No. corresponding to the position information included in the call information from the list selected by the first selection unit 32. Select. The second selection unit 34 selects one or more selected area numbers. Generates a calling signal including the signal and outputs the calling signal to the transmitting unit 30.

  In the terminal device 16 of FIG. 5, the storage unit 52 stores a plurality of types of lists. This list is the same as the list stored in the storage unit 22 of FIG. That is, the list No. stored in the storage unit 22. Same list No. A plurality of types of lists assigned with are stored. The communication unit 58 transmits information about the list to be used, that is, the list No. Is received from the base station device 14. The communication unit 58 displays the list No. Is output to the selection unit 54 via the control unit 56. The selection unit 54 displays the list No. Enter. The selection unit 54 receives the list No. received from the plurality of types of lists stored in the storage unit 52. Select the list that matches. Further, the selection unit 54 selects the area No. corresponding to the position information acquired by the acquisition unit 50 from the selected list. Select. The selection unit 54 selects the selected area number. Is output to the control unit 56.

  The operation of the communication system 100 having the above configuration will be described. FIG. 12 is a sequence diagram showing a communication procedure by the communication system 100 according to the third 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 selects a list (S92). The base station device 14 uses the list No. Is transmitted (S94). The terminal device 16 selects a list (S96). The terminal device 16 acquires the position information (S98). The terminal device 16 uses the area number. (First area No.) is selected (S100). The command device 10 transmits the call information to the base station device 14 (S102). The base station device 14 uses the area number. (Second area No.) is selected (S104) and a calling signal is generated (S106). The base station device 14 transmits a calling signal (S108). If the terminal device 16 is in the first area No. And the second area No. If the agreement is confirmed (S110), the command device 10 and the terminal device 16 execute communication (S112).

  According to the present embodiment, the received list No. The list is switched according to, so you can use the list that reflects the will of the commander. Further, since the list reflecting the will of the commander is used, only the person near the site can be called. Moreover, since only the people near the site are called, it is possible to avoid calling a large number of people in vain. In addition, according to the type of event that occurred, the area number. Since the range of is changed, it is possible to make a minimum number of calls to the other party. In addition, since it is possible to make a call to the minimum necessary number of opponents, it is possible to avoid unnecessary movement (such as an unnecessary person rushing to the scene).

(Example 4)
Next, a fourth embodiment will be described. The fourth embodiment is compatible with the commercial radio as in the past, and the area number. The present invention relates to a communication system for calling a terminal device. The base station device and the terminal device according to the fourth embodiment also hold a plurality of lists, and select and use one common list according to predetermined conditions. Here, in particular, the list is changed according to the density of the terminal devices in order to execute the call by changing the size of the area according to the density of the terminal devices. If a crime occurs at a certain place and you want to send a police officer there, if there are many police officers near the crime occurrence place, it is better to reduce the area near the crime occurrence place and call only the nearest police officer. preferable. On the other hand, when there are few police officers near the crime occurrence place, it is possible to call police officers existing in a wide range to some extent by enlarging the area near the crime occurrence place. It is preferable that the response can be secured even in a large area (even if the accuracy of pinpoint is deteriorated) rather than when there is no response in the desired area and no response. The communication system 100 and the terminal device 16 according to the fourth embodiment are the same types as those in FIGS. 1 and 5. Here, the difference will be mainly described.

  FIG. 13 shows the configuration of the base station device 14 according to the fourth embodiment of the present invention. The base station device 14 includes an input unit 20, a storage unit 22, a communication unit 26, a processing unit 28, a first selection unit 32, a second selection unit 34, and a counting unit 38. The communication unit 26 also includes a transmission unit 30. The counting unit 38 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 collected. Therefore, the counted number of terminal devices 16 can be said to be the degree of congestion in the area or area group. In the following, each area is used for the sake of clarity. The counting unit 38 outputs the counting result to the first selecting unit 32. The storage unit 22 stores a plurality of types of lists. Here again, the size of the area differs for each list. Areas of different sizes may be combined in one list.

  The first selection unit 32 selects a list corresponding to the size of the area according to the result of counting by the counting unit 38 from the plurality of types of lists stored in the storage unit 22. For example, when the number of terminal devices 16 for a certain area is higher than the first threshold value, the first selection unit 32 selects a list such that the area becomes smaller, and the number of terminal devices 16 is the second. If it is less than or equal to the threshold value, the list is selected so that the area becomes large. This corresponds to dividing the area when the density is high and merging the areas when the density is low. In addition, after the area of 1 km square is divided into 100 m square areas, when the density of a specific area becomes high, the area may be further subdivided (for example, 50 m square). In this way, the size of the area may be changed a plurality of times depending on the density. The first selection unit 32 displays the list No. corresponding to the selected list. Is output to the transmission unit 30. Since the processing in the terminal device 16 is the same as that in the third embodiment, the description thereof is omitted here.

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

  According to the present embodiment, the area size is changed according to the number of terminal devices, so that efficient calling can be realized. Further, since efficient calling is realized, it is possible to suppress useless calling. In addition, the list No. Since the list is switched only by receiving, it is possible to suppress an increase in traffic volume.

(Example 5)
Next, a fifth embodiment will be described. The fifth embodiment is compatible with the commercial wireless as in the past, and the area number. The present invention relates to a communication system for calling a terminal device. The base station device and the terminal device in the third and fourth embodiments hold a plurality of lists, and the base station device 14 uses the list No. to be used. To the terminal device 16. On the other hand, the fifth embodiment aims to improve the flexibility of the list. Therefore, the base station device 14 transmits a new list to the terminal device 16 and updates the list stored in the terminal device 16. The communication system 100 and the terminal device 16 according to the fifth embodiment are of the same type as those in FIGS. Moreover, the base station apparatus 14 according to the fifth embodiment is of the same type as that of FIG. 11 or 13. Here, the difference will be mainly described.

  The storage unit 22 in FIG. 11 or 13 stores a new list. The transmission unit 30 transmits the new list stored in the storage unit 22. On the other hand, the communication unit 58 of FIG. 5 receives the new list from the base station device 14. The storage unit 52 stores the list received by the communication unit 58. By such processing, the base station device 14 updates the list stored in the storage unit 52. In addition, the transmission unit 30 displays the new list stored in the storage unit 22 and the list No. of the list. And may be associated and transmitted. In that case, the storage unit 52 stores the list and list No. received by the communication unit 58. And are stored in association with each other. Then, in the second and subsequent uses of the list, the base station device 14 uses the list No. to be used, as in the third and fourth embodiments. Can be notified to the terminal device 16.

  The operation of the communication system 100 having the above configuration will be described. FIG. 15 is a sequence diagram showing a communication procedure by the communication system 100 according to the fifth embodiment of the present invention. The command device 10 transmits the list to the base station device 14 (S170). The base station device 14 stores the list (S172). The base station device 14 transmits the list (S174). The terminal device 16 stores the list (S176). The terminal device 16 acquires the position information (S178). The terminal device 16 uses the area number. (First area No.) is selected (S180). The command device 10 transmits the call information to the base station device 14 (S182). The base station device 14 uses the area number. (Second area No.) is selected (S184), and a calling signal is generated (S186). The base station device 14 transmits a calling signal (S188). If the terminal device 16 is in the first area No. And the second area No. If the coincidence is confirmed (S190), the command device 10 and the terminal device 16 execute communication (S192).

  According to the present embodiment, since the list is received, a new list can be dealt with. Further, since it corresponds to a new list, it is possible to flexibly deal with the change of the list. In addition, since a new list is also supported, the flexibility of the communication system can be improved.

  The present invention has been described above based on the embodiments. This embodiment is merely an example, and it is understood by those skilled in the art that various modifications can be made to each of the constituent elements and each processing process / BR> combination, and such modifications are also within the scope of the present invention. This is where

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

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

  10 command device, 12 network, 14 base station device, 16 terminal device, 20 input unit, 22 storage unit, 24 selection unit, 26 communication unit, 28 processing unit, 30 transmission unit, 50 acquisition unit, 52 storage unit, 54 selection Section, 56 control section, 58 communication section, 60 processing section, 100 communication system.

Claims (4)

An input unit for acquiring call information including position information,
A storage unit that stores a list including the correspondence between the areas and the identifiers;
A selection unit that selects an identifier based on the position information acquired by the input unit and an area included in the list stored in the storage unit, and that generates a calling signal including the selected identifier;
A communication unit that transmits the generated call signal to the terminal device,
A calling device comprising: Further comprising a processing unit that executes communication,
When the communication unit receives a response signal from the terminal device in which the identifier based on the position information of the terminal device and the identifier included in the call signal match,
The processing unit executes communication with the terminal device,
The calling device according to claim 1, wherein: Obtaining call information including location information,
Storing a list containing the correspondence between areas and identifiers,
Selecting an identifier based on the acquired position information and the area included in the stored list, and generating a ringing signal including the selected identifier,
Transmitting the generated call signal to the terminal device,
And a calling method comprising: Obtaining call information including location information,
Storing a list containing the correspondence between areas and identifiers,
Selecting an identifier based on the acquired position information and the area included in the stored list, and generating a ringing signal including the selected identifier,
A program for causing a computer to execute the step of transmitting the generated call signal to the terminal device.

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