Management device, communication system, management method, and program

Abstract

To enable a user of a radio terminal to acquire a state of a propriety of communication with a public radio system, even in a state of the radio terminal being incapable of communicating with a radio station in the public radio system.SOLUTION: A management device 1 comprises a determination unit 1a, a request transmission unit 1b, and an information transmission unit 1c. The determination unit 1a determines necessity of distribution of state information showing a radio communication state in a public radio system including a radio station for performing radio communication with a radio terminal. The distribution is distribution to a mobile communication terminal via a mobile communication system for providing mobile communication service for the mobile communication terminal. When it is determined by the determination unit 1a that the distribution is necessary, the request transmission unit 1b transmits to the mobile communication system a request for setting a fixation dedicated channel fixed so as to be dedicated to the public radio system into a public communication network used in the mobile communication system. The information transmission unit 1c transmits to the mobile communication system the state information to be distributed to the mobile communication terminal using the fixation dedicated channel.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a management device, a communication system, a management method, and a program.

Background Art

[0002] In the field of public safety such as firefighting, disaster prevention, and transportation, public organizations operate their own communication infrastructure networks (public wireless systems) in which wireless facilities are independently installed. By constructing such a public wireless system, emergency calls can be made without being affected by the line status (such as congestion) of the public communication network in the event of an emergency.

[0003] Patent Document 1 describes a system for quickly grasping the disaster situation at the time of a disaster, which includes a disaster prevention communication system having a mobile phone carrier network and a fire and disaster prevention wireless network. The mobile phone carrier network includes a communication infrastructure monitoring server that constitutes and monitors the communication network of mobile phones. The fire and disaster prevention wireless network includes a disaster victim movement monitoring server and an ambulance team movement monitoring server that constitute and monitor the communication network of business wireless.

[0004] The communication infrastructure monitoring server identifies the service area where a failure has occurred at the time of a disaster and notifies the fire and disaster prevention wireless network of the service area. The disaster victim movement monitoring server and the ambulance team movement monitoring server notify the wireless devices under their management of the service area identified as having a failure and perform the following acquisition process. That is, the acquisition process is a process of acquiring from the wireless device information acquired by the wireless device regarding a mobile phone that constitutes the sensor network via the sensor network when the wireless device is located within the service area. Note that the information acquired by the wireless device regarding the mobile phone refers to the position information obtained by the mobile phone based on the GPS (Global Positioning System) function and the identification number of the mobile phone.

Prior Art Documents

Patent Documents

[0005] Patent Document 1 Japanese Unexamined Patent Application Publication No. 2010-157881 Summary of the Invention Problems to be Solved by the Invention

[0006] By the way, due to factors such as installation location and cost, the number of radio stations (radio facilities broadly classified into base stations or relay stations) that can be installed in a public radio system is limited, and the communicable area and the number of lines are restricted.

[0007] Therefore, in the event of an emergency, if a device failure occurs in a radio station of the public radio system, communication with mobile radios under that radio station becomes impossible, and thus information on the communication availability status of the public radio system (communicable area, non-communicable area, available communication line number, etc.) cannot be obtained. Note that the disaster prevention communication system described in Patent Document 1 cannot solve this problem.

[0008] An object of the present disclosure is to provide a management device, a communication system, a management method, and a program that enable a user of a wireless terminal to obtain information on the communication availability status with a public radio system even in a situation where the wireless terminal cannot communicate with a radio station in the public radio system, in view of the above-described problems. Means for Solving the Problems

[0009] The management device according to the first aspect of the present disclosure includes a determination unit, a request transmission unit, and an information transmission unit. The determination unit determines the necessity of distribution of status information indicating a wireless communication status in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, with respect to distribution to the mobile communication terminal via a mobile communication system that provides a mobile communication service to the mobile communication terminal. When the determination unit determines that the distribution is necessary, the request transmission unit transmits a request to set a fixed dedicated channel fixed specifically for the public wireless system within a public communication network used by the mobile communication system to the mobile communication system. The information transmission unit transmits the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system.

[0010] The communication system according to the second aspect of the present disclosure includes a wireless terminal, a management device that manages communication in a public wireless system having a wireless station that performs wireless communication with the wireless terminal, a mobile communication terminal, and a communication management device. The communication management device manages communication in a mobile communication system that provides mobile communication services to the mobile communication terminal. The management device has a determination unit that determines the necessity of distributing status information indicating the wireless communication status in the public wireless system to the mobile communication terminal via the mobile communication system. When the determination unit determines that the distribution is necessary, the management device has a request transmission unit that transmits a request to set a fixed dedicated channel fixed specifically for the public wireless system in a public communication network used by the mobile communication system. The management device has an information transmission unit that transmits the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system. The communication management device has a first reception unit that receives the status information and a request for distribution of the status information from the management device. The communication management device has a setting unit that sets the fixed dedicated channel fixed specifically for the public wireless system in the public communication network in response to the request, and a transmission unit that transmits the status information to the mobile communication terminal on the fixed dedicated channel. The mobile communication terminal has a second reception unit that receives the status information on the fixed dedicated channel, and a presentation unit that presents information indicating an area where radio waves can be received from a wireless station that can currently communicate in the public wireless system according to the wireless communication status indicated by the status information.

[0011] The management method according to the third aspect of the present disclosure includes the following three steps executed by a management device that manages communication in a public wireless system having a wireless station that performs wireless communication with a wireless terminal. The first step is to distribute status information indicating the wireless communication status in the public wireless system, and to determine whether such distribution to the mobile communication terminal via a mobile communication system that provides mobile communication services to the mobile communication terminal is necessary. The second step is to transmit, to the mobile communication system, a request to set a fixed dedicated channel dedicated to the public wireless system in the public communication network used by the mobile communication system when it is determined that the distribution is necessary. The third step is to transmit the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system.

[0012] The program according to the fourth aspect of the present disclosure is a program for causing a computer that manages communication in a public wireless system having a wireless station that performs wireless communication with a wireless terminal to execute the following three steps. The first step is to distribute status information indicating the wireless communication status in the public wireless system, and to determine whether such distribution to the mobile communication terminal via a mobile communication system that provides mobile communication services to the mobile communication terminal is necessary. The second step is to transmit, to the mobile communication system, a request to set a fixed dedicated channel dedicated to the public wireless system in the public communication network used by the mobile communication system when it is determined that the distribution is necessary. The third step is to transmit the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system.

Advantages of the Invention

[0013] According to the present disclosure, it is possible to provide a management device, a communication system, a management method, and a program that enable a user of a wireless terminal to obtain information on whether communication with a public wireless system is possible even in a situation where the wireless terminal cannot communicate with a wireless station in the public wireless system.

Brief Description of the Drawings

[0014]

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Mode for Carrying Out the Invention

[0015] Hereinafter, embodiments will be described with reference to the drawings. In the embodiments, the same or equivalent elements are denoted by the same reference numerals, and redundant explanations are omitted as appropriate.

[0016] <Embodiment 1> Embodiment 1 will be described with reference to FIGS. 1 to 3. FIG. 1 is a block diagram showing a configuration example of the management device according to Embodiment 1. FIG. 2 is a schematic diagram showing a configuration example of a communication system including the management device of FIG. 1, and FIG. 3 is a block diagram showing a configuration example of a mobile communication system in the communication system of FIG. 2.

[0017] As shown in FIG. 1, the management device 1 according to the present embodiment includes a determination unit 1a, a request transmission unit 1b, and an information transmission unit 1c, which will be described later. The management device 1 is a device that manages communication in a public wireless system. This public wireless system is a system independently operated by a public body such as a municipality, and is operated for each one or more public bodies. Hereinafter, for the sake of simplicity of explanation, the public wireless system basically operated by one public body will be described.

[0018] As shown in FIG. 2, the public wireless system includes, in addition to the management device 1, a line control device 2, one or more wireless stations 3-1, 3-2,... (hereinafter referred to as wireless station 3 when not distinguished), and one or more wireless terminals 4.

[0019] The wireless terminal 4 is a wireless device that constitutes a public wireless system and performs wireless communication with the wireless station 3 using a predetermined communication method. The wireless terminal 4 is, for example, a mobile wireless device such as a handy type or an in-vehicle type, and a plurality of them can exist. The wireless terminal 4 can transmit and receive information such as voice calls with other wireless terminals 4, and can also receive notifications such as voice, character information, and image information issued by a public body that are transmitted from the management device 1 via the line control device 2. Hereinafter, such notifications will be described as being made from the management device 1. However, the public wireless system can include a wireless terminal as a semi-fixed station installed in a public body's facility. In that case, the wireless terminal as this semi-fixed station can send a notification issued by the public body to the wireless terminal 4.

[0020] The wireless station 3 is, for example, a base station or a relay station, and is connected as a part of the wireless equipment in the public wireless system via the line control device 2 and the network N2. The line control device 2 is connected to the management device 1 via the network N1 and is connected to the wireless station 3 via the network N2, and performs line control regarding communication between the management device 1 and the wireless terminal 4 and communication between the wireless terminals 4. The management device 1 manages the communication of the public wireless system having the wireless terminal 4 and the wireless station 3. Note that the management device 1 can include the function of the line control device 2. In that case, the wireless station 3 is directly connected to the management device 1 via the network.

[0021] The determination unit 1a of the management device 1 determines whether to distribute status information indicating the wireless communication status (operation status) in the public wireless system. Such distribution is distribution to the mobile communication terminal 7 via a mobile communication system (mobile body communication system) that provides a mobile communication service (mobile communication service) to the mobile communication terminal 7.

[0022] An example of a mobile communication system is shown in FIG. 2. This mobile communication system can include a communication management device 5, one or more radio stations 6 connected to the communication management device 5 via a network N4, and a plurality of mobile communication terminals 7. The communication management device 5 manages communication in a mobile communication system that provides mobile communication services to the mobile communication terminals 7. The radio station 6 is a part of the radio facilities in the mobile communication system and is a base station or a relay station for communicating with the mobile communication terminals 7, and is connected to the communication management device 5 via the network N4. The mobile communication terminal (mobile communication terminal device) 7 is a mobile phone (including those referred to as smartphones), a portable PC (Personal Computer), an information terminal device, etc.

[0023] Although the mobile communication terminal 7 and the wireless terminal 4 have different names from each other, this is only for the purpose of distinction. However, the wireless terminal 4 and the mobile communication terminal 7 belong to different systems. The communication methods, communication frequency bands, communication time bands, and codes for identifying communication between systems may be different.

[0024] For the above distribution, the management device 1 is connected to the mobile communication system via a public communication network (network), and in the example of FIG. 2, it is connected to the communication management device 5 via the network N3.

[0025] The above situation information can include, as wireless communication situation information, information indicating the wireless communication availability situation at each radio station 3. For example, in a public wireless system, it can include area information indicating the radio wave reception possible area from a radio station 3 that can communicate with the wireless terminal 4 for the wireless terminal 4. The above situation information can include, as the wireless communication availability situation, not only the radio wave reception possible area (communication possible area), but also information such as the communication impossible area and the number of available communication lines.

[0026] When the determination unit 1a determines that the above distribution is necessary, the request transmission unit 1b transmits a request as described below to the mobile communication system. Such a request refers to a request for setting a fixed dedicated channel fixedly set for the public wireless system in the public communication network (within network N4, or within network N4 and radio station 6) used in the mobile communication system.

[0027] The information transmission unit 1c transmits the above situation information for distribution to the mobile communication terminal 7 via the fixed dedicated channel, together with or separately from (after the request), to the mobile communication system. In the case of the example in FIG. 2, when the determination unit 1a determines that the above distribution is necessary, the request transmission unit 1b transmits such a request to the communication management device 5 via the network N3, and the information transmission unit 1c transmits the situation information to the communication management device 5 via the network N3.

[0028] Although not shown, the management device 1 includes a control unit that controls the whole and a communication unit that communicates with the line control device 2 and the communication management device 5. The determination unit 1a is mounted as a part of this control unit, and the request transmission unit 1b and the information transmission unit 1c are mounted as a part of this communication unit and a part of this control unit (the part that causes the information to be transmitted to this communication unit). This control unit is realized by, for example, a CPU (Central Processing Unit), a working memory, and a non-volatile storage device that stores a program (such as firmware). This control unit can be realized including an integrated circuit (Integrated Circuit). Also, the above communication unit can be configured by a communication interface for connecting to the networks N1, N3.

[0029] Although not shown, the line control device 2 includes a control unit that controls the whole and a communication unit that communicates with the management device 1 and the radio station 3. Although not shown, the radio station 3 includes a control unit that controls the whole and a wireless communication unit having an antenna, a modulator, a demodulator, an amplifier, etc. suitable for its communication method. Although not shown, the wireless terminal 4 includes a control unit that controls the entire terminal, and a wireless communication unit that includes an antenna, a modulator, a demodulator, an amplifier, etc., suitable for its communication method.

[0030] To perform the processing according to the above requirements, the communication management device 5 includes a control unit 51, a receiving unit 52, and a transmitting unit 53 as shown in FIG. 3. The control unit 51 manages mobile communication in a mobile communication system that provides mobile communication services to the mobile communication terminal 7. The control unit 51 can be a control unit that controls the entire communication management device 5. Note that the control unit 51 can be realized by, for example, a CPU, a working memory, and a non-volatile storage device that stores a program (such as firmware), and can be realized including an integrated circuit.

[0031] The receiving unit 52 receives status information indicating the wireless communication status in the public wireless system and a request for its distribution from the management device 1. The control unit 51 sets, in the public communication network used in the mobile communication system, a channel (fixed dedicated channel) that is fixed specifically for the public wireless system to which the request received by the receiving unit 52 is directed.

[0032] The transmitting unit 53 transmits the status information received by the receiving unit 52 to the mobile communication terminal 7. Here, the transmitting unit 53 transmits the status information to the mobile communication terminal 7 on the set fixed dedicated channel. Also, the mobile communication terminal 7 to be the transmission destination is specified by information such as a telephone number (terminal specific information) on the management device 1 side. Information regarding the specification (terminal specific information) can be included in, for example, the above request. In that case, the management device 1 only needs to store the information regarding the specification before the request. Alternatively, the mobile communication terminal 7 can be configured to specify the public wireless system and request status information, and the transmitting unit 53 of the communication management device 5 that has received the request returns the previously received status information to the mobile communication terminal 7.

[0033] Although not shown, the communication management device 5 includes a communication unit that communicates with the management device 1 and the wireless station 6, and can be configured such that the receiving unit 52 and the transmitting unit 53 have the functions of this communication unit.

[0034] Although not shown, the wireless station 6 includes a control unit that controls the whole thereof, and a wireless communication unit that has an antenna, a modulator, a demodulator, an amplifier, etc. suitable for each communication method.

[0035] As shown in FIG. 3, the mobile communication terminal 7 includes a communication unit 71 and a presentation unit 72. The communication unit 71 communicates with a mobile communication system that provides a mobile communication service. That is, the communication unit 71 can communicate with the communication management device 5 via the wireless station 6. The communication unit 71 has an antenna, a modulator, a demodulator, etc. suitable for its communication method. And the communication unit 71 receives the status information indicating the wireless communication status in the public wireless system on the fixed dedicated channel set as described above in the mobile communication system. That is, although not shown, the communication unit 71 has a receiving unit that receives the status information on the fixed dedicated channel.

[0036] The presentation unit 72 includes at least one of a display device and an audio output device. And the presentation unit 72 presents information indicating an area where radio waves can be received for the wireless station 3 that can currently communicate in the public wireless system according to the wireless communication status indicated by the received status information. This presentation is preferably made in a form of guiding (guiding) the user to the area where radio waves can be received.

[0037] Although not shown, the mobile communication terminal 7 includes a control unit that controls the whole thereof. This control unit is realized by, for example, a CPU, a working memory, and a non-volatile storage device that stores a program (such as firmware), and can be realized including an integrated circuit. The control executed by this control unit can include control for giving an output instruction to a display device or the like in the presentation unit 72.

[0038] As described above, the communication system according to the present embodiment includes a public wireless system and a mobile communication system that is a public communication system, and cooperates them to notify the mobile communication terminal 7 of the wireless communication status such as the communicable area regarding the wireless station 3.

[0039] Therefore, according to this embodiment, as shown in FIG. 2, even in a situation where the wireless terminal 4 cannot communicate with a certain wireless station 3 (for example, wireless station 3-1), the mobile communication terminal 7 can obtain the communication availability status with the public wireless system. Thereby, the user of the wireless terminal 4 can be guided to an area where wireless communication is possible with the wireless terminal 4 (for example, the wireless communication available area at the wireless station 3-2).

[0040] As described above, one public wireless system has been basically described. However, by identifying a plurality of public wireless systems so that they can be distinguished from each other, they can be simultaneously applied in a common mobile communication system in the same manner as in one case. That is, when the communication system according to this embodiment is made to correspond to a plurality of public wireless systems, when the above request is received from each public wireless system, a fixed dedicated channel associated with each public wireless system may be set.

[0041] Also, although the description has been made on the premise that there is basically one mobile communication system, a plurality of mobile communication systems can be provided. For example, a mobile communication system is constructed for each mobile carrier. In that case, a fixed dedicated channel is set for the mobile communication system of the carrier to which the mobile communication terminal 7 belongs, and the status information can be distributed to the mobile communication terminal 7 via those fixed dedicated channels.

[0042] <Embodiment 2> Regarding Embodiment 2, the differences from Embodiment 1 will be mainly described with reference to FIGS. 4 to 14. Although the description of overlapping parts will be omitted, various examples described in Embodiment 1 can also be applied in this embodiment. First, with reference to FIG. 4, the public wireless system in the communication system according to this embodiment will be described. FIG. 4 is a schematic diagram showing a configuration example of the public wireless system in the communication system according to this embodiment.

[0043] As shown in FIG. 4, the public wireless system according to this embodiment includes a management device 1, a line control device 2 connected to the management device 1 via a network N1, a wireless station 3-1 and a wireless station 3-2 connected to the line control device 2 via a network N2, and a wireless terminal 4. For the sake of simplicity of explanation, two wireless stations 3 and one wireless terminal 4 are used. However, as described in the first embodiment, the number of each can be three or more and two or more, respectively.

[0044] This wireless system has a communication connection state as shown in FIG. 4. That is, in this communication connection state, since the wireless terminal 4 exists within the wireless communication area 31 of the wireless station 3-1, the wireless terminal 4 can perform wireless communication with the wireless station 3-1. Also, in this communication connection state, since the wireless terminal 4 exists outside the wireless communication area 32 of the wireless station 3-2, the wireless terminal 4 cannot perform wireless communication with the wireless station 3-2.

[0045] In this embodiment, even if a line failure occurs in the line through which the wireless terminal 4 connects to the line control device 2 via the wireless station 3-1 and communication becomes impossible from such a communication connection state, the user of the wireless terminal 4 is guided so that communication can be performed via the wireless station 3-2. A series of processing examples will be described with reference to FIGS. 5 to 11.

[0046] FIG. 5 is a schematic diagram showing a wireless communication procedure executed by the communication system according to this embodiment when the wireless terminal 4 cannot perform wireless communication with the wireless station 3-1 in the public wireless system of FIG. 4. FIGS. 6 to 8 are schematic diagrams for explaining an example of the wireless communication procedure in FIG. 5 in the communication system according to this embodiment, and are diagrams for explaining different examples.

[0047] As shown in FIG. 5, first, due to some kind of failure, the wireless terminal 4 cannot communicate with the wireless station 3-1. Such a failure state can occur, for example, due to a failure of the transmission / reception unit 34 provided in the wireless station 3-1 as shown in FIG. 6. In this example, the wireless station 3-1 has a control unit 33 that controls the whole thereof, and a transmission / reception unit 34 that performs wireless communication based on the control of the control unit 33.

[0048] As shown in FIG. 6, in the case of a failure caused by the transmission / reception unit 34 such as a failure of the transmission / reception unit 34, the control unit 33 detects the failure by receiving warning information from the transmission / reception unit 34 indicating that communication is impossible with the transmission / reception unit 34, detecting that there is no response from the transmission / reception unit 34, etc., and transmits warning information to the line control device 2. The line control device 2 receives the warning information and transmits the warning information to the management device 1. Although these warning information transmitted and received between the devices can be the same information, they may be different information as long as the information can identify the radio station 3-1 that is in a non-communication state. This also applies to the following other examples. For example, it can include information regarding the results of the radio station 3-1 and the line control device 2 corresponding to the detected failure (hereinafter referred to as correspondence information. For example, log information can be cited).

[0049] The management device 1 that has received the warning information transmits a request to open a dedicated fixed channel to the communication management device 5, and situation information corresponding to the warning information. The situation information in this case can be information indicating that the radio station 3-1 is in a non-communication state, correspondence information, information indicating that the radio station 3-2 that has not received the warning information is communicable and indicating its wireless communicable area, etc. The communication management device 5 receives this opening request and situation information, transmits an instruction to open a dedicated fixed channel for the public wireless system managed by the management device 1 to the radio station 6, and also transmits the received situation information to the radio station 6. The radio station 6 opens a dedicated fixed channel in response to this, and transmits the situation information to the mobile communication terminal 7.

[0050] The above dedicated fixed channel can have a frequency band, time slot, code, and spatial region that are secured for preferential communication, and can be a channel that enables simultaneous communication for a plurality of mobile communication terminals 7 held by a plurality of users respectively. The dedicated fixed channel can be configured (opened) as a dedicated area (dedicated channel) for a target public wireless system, for example, by utilizing network slicing, that is, a mechanism for virtually slicing (dividing) the network. Alternatively, the dedicated fixed channel can be opened by utilizing, for example, the multicast service (MBMS) function introduced in LTE (Long Term Evolution) Release 9. Note that MBMS is an abbreviation for Multimedia Broadcast and Multicast Service. MBMS is a transmission method for simultaneously distributing information to all mobile communication terminals 7 (UE: User Equipment) within a specific area via a common bearer. By utilizing this function of MBMS, it is possible to fixedly distribute information (such as communication equipment / area status) of the private wireless network until the restoration of the private wireless network. Also, a channel can be set to a specific space by utilizing the directivity of the antenna. Of course, the configuration and usage of the dedicated fixed channel are not limited to these examples.

[0051] Also, as described in Embodiment 1, the transmission of the situation information to the mobile communication terminal 7 can be performed by specifying information such as the telephone number and IMEI of the mobile communication terminal 7 (terminal specific information). In that case, the terminal specific information can be transmitted from, for example, the management device 1 side. IMEI is an abbreviation for International Mobile Equipment Identifier. Also, when transmitting the situation information to the mobile communication terminal 7 by specifying information such as the telephone number of the mobile communication terminal 7 (terminal specific information), the user can receive the situation information by SMS without performing operations such as setting operations of the mobile communication terminal 7. SMS is an abbreviation for Short Message Service. Alternatively, as an alternative to the transmission of the situation information to the mobile communication terminal 7, as described in Embodiment 1, the situation information can also be transmitted by accessing the location where the situation information is stored from the mobile communication terminal 7 side. Thus, as a method for distributing the situation information, for example, it is not limited to using SMS, which is a service for exchanging messages with the telephone number as the destination between mobile phones, and various methods such as posting on a website can be adopted.

[0052] Also, the situation information distributed on the fixed dedicated channel is not limited to only the line status of the private infrastructure network (public wireless system) as described above, and can include, for example, information indicating the available time of equipment for a wireless station 3 capable of wireless communication (for example, wireless station 3-2). The available time of the equipment can include the continuous operable time of system infrastructure equipment such as the wireless station 3 and the line control device 2, and the operation time zone when operating intermittently.

[0053] The above line status can include the operation status (normal / abnormal), connection status, and congestion prediction of each wireless station 3. When the connection status indicates that the line between the wireless station 3 and the line control device 2 is communicable, communication between the management device 1 and the wireless station 3 (including calls with a control console, command console, etc., which are the upper devices of the management device 1) is possible, but it can be indicated that the next communication is impossible. That is, it can be indicated that communication between the wireless station 3 and the wireless terminal 4 is impossible. In addition, when the connection status indicates that the line between the radio station 3 and the line control device 2 is not communicable, it is assumed that the radio station 3 operates alone, and only the repeat call between the radio terminals 4 under the radio station 3 is possible, and the inference information can be shown. The congestion prediction of the line can be obtained from the number of radio terminals 4 waiting under the radio station 3 (that is, the number of mobile stations). By notifying this, the user can infer the difficulty of connecting the line for each radio station 3. According to the above inference, it is possible to determine whether to move to the radio communication available area of another radio station 3 or wait for the movement.

[0054] In any case, the user using the radio terminal 4 can receive and check the situation information (line information such as radio communication available area) about the public radio system from the mobile communication system as a user using the mobile communication terminal 7. Then, as shown in FIG. 5, the user having the radio terminal 4 can return the radio terminal 4 to the public radio system by moving to the radio communication available area 32 of the radio station 3-2 based on the situation information presented by the mobile communication system. That is, the radio terminal 4 and the radio station 3-2 can be brought into a communicable state.

[0055] As described in the example of FIG. 6, when the management device 1 receives warning information (information such as a failure) indicating that radio communication is impossible in the radio station 3-1 of the public radio system, it determines that the distribution of situation information is necessary. This determination is executed by the determination unit 1a in FIG. 1. Then, the management device 1 transmits, as situation information, information indicating the radio wave reception available area of the radio station 3-2 that is currently communicable in the public radio system, which is different from the radio station 3-1 related to the warning information. This transmission is executed by the information transmission unit 1c in FIG. 1.

[0056] Also, as described above, such a failure state can also occur due to a communication failure (line failure) in the network N2 between the line control device 2 and the radio station 3-1 as shown in FIG. 7, a failure of the control unit 33 of the radio station 3-1, or a failure of a communication unit (not shown) that connects to the network N2. In this example, the line control device 2 detects a line disconnection from the radio station 3-1 and transmits warning information to the management device 1. Thereafter, the same processing as in the example of FIG. 6 is performed, and finally, as shown in FIG. 5, the user with the wireless terminal 4 moves to the wireless communication available area 32 of the radio station 3-2 presented, so that the wireless terminal 4 can be restored to the public wireless system.

[0057] As described in the example of FIG. 7, when the management device 1 receives warning information (obstacle information on the intermediate path) indicating that communication with the radio station 3-1 included in the public wireless system is impossible, it determines that distribution of situation information is necessary. This determination is executed by the determination unit 1a in FIG. 1. Then, as situation information, the management device 1 transmits information indicating the radio wave reception available area of the radio station 3-2 that is connected via a path different from the path related to the warning information and is currently communicable in the public wireless system. This transmission is executed by the information transmission unit 1c in FIG. 1. Also, although an example of transmitting information indicating the radio wave reception available area as situation information is given, information indicating the area where wireless communication is impossible can also be transmitted together.

[0058] In the examples of FIGS. 6 and 7, an example of transmitting a dedicated channel opening request (opening request) from the management device 1 to the communication management device 5 is given, but the device that sends the opening request is not limited. For example, the opening request can also be directly transmitted from the line control device 2 to the communication management device 5.

[0059] In addition, the above-described failure state can also be caused by other factors such as a communication failure in the network N1 between the management device 1 and the line control device 2, or a failure of the line control device 2 as shown in FIG. 8. In the case of this example, the management device 1 detects a disconnection of the line with the line control device 2. Based on this detection, the management device 1 determines that wireless communication using the public wireless system having the line control device 2 and the subordinate wireless stations 3-1 and 3-2 is impossible. In this case, the management device 1 transmits a request to open a dedicated fixed channel and situation information corresponding to the warning information to the communication management device 5. For example, when a line control device belonging to the second public wireless system is connected to the management device 1, information indicating the wireless communication available area of the wireless stations under the line control device and information related to wireless communication (frequency band, time zone, code) are included as situation information. As a result, the user with the wireless terminal 4 can finally move to the wireless communication available area of the wireless station presented and refer to the information related to wireless communication, thereby connecting the wireless terminal 4 to the second public wireless system.

[0060] Note that in the example of FIG. 8, an example is given in which a request to open a fixed dedicated channel (opening request) is transmitted from the management device 1 to the communication management device 5. However, the device that sends the opening request is not limited. For example, if there is no failure of the line control device 2 and there is a communication failure in the network N1, the line control device 2 can directly transmit an opening request to the communication management device 5.

[0061] Alternatively, the communication management device 5 can detect a disconnection of the line with the line control device 2 and automatically open a fixed dedicated channel considering it as an opening request. However, in that case, the communication management device 5 only needs to hold in advance information necessary for such an opening, such as information on the wireless communication available area of the wireless stations under the line control device 2 and the above-mentioned other line control devices.

[0062] As described in the example of FIG. 8, when the management device 1 receives warning information indicating the occurrence of a disaster that makes wireless communication impossible in the wireless stations 3-1 and 3-2 of the public wireless system in the public wireless system (such as the management device 1), the following determination is made. That is, it is determined that the distribution of the situation information is necessary. This determination is executed by the determination unit 1a in FIG. 1. Then, the management device 1 transmits, as the situation information, information indicating the radio wave reception possible area of the wireless stations that are currently communicable in the public wireless system, which is different from the wireless stations 3-1 and 3-2 related to the warning information. This transmission is executed by the information transmission unit 1c in FIG. 1. Also, although an example of transmitting information indicating the radio wave reception possible area as the situation information is given, information indicating the area where wireless communication has become impossible can also be transmitted together.

[0063] Here, referring to FIGS. 9 and 10, a processing example (an example of a channel opening request sequence) in the management device 1 in response to the reception or detection of the warning information as described above will be described. FIG. 9 is a flowchart for explaining an example of a process of the management device 1 of the present wireless system, and FIG. 10 is a flowchart for explaining another example of a process of the management device of the present wireless system.

[0064] Referring to FIG. 9, a processing example applied to the examples of FIGS. 6 and 7 will be described. In this case, the management device 1 receives warning information from the line control device 2 (step S11), and determines whether the warning information is the warning information detected by the line control device 2 (step S12). If the answer is NO in step S12, the management device 1 determines whether the warning information is the warning information detected by the wireless station (step S13). If the answer is NO in step S13, the process ends. If the answer is YES in step S12, and also if the answer is YES in step S13, the management device 1 determines from the warning information whether it is a warning that makes wireless communication impossible (step S14), and if the answer is NO, the process ends. Note that the order of step S12 and step S13 can be interchanged.

[0065] If the answer in step S14 is YES, the management device 1 transmits warning information to the mobile communication system as a request to establish a dedicated fixed channel (step S15), notifies the situation information as well (step S16), and ends the process. Note that steps S15 and S16 may be simultaneous.

[0066] With reference to FIG. 10, a processing example applied to the example of FIG. 8 will be described. In this case, the management device 1 detects a failure in an intermediate path, such as a line interruption of the network N1, as a warning (step S21), determines from the detection result whether it is a warning that wireless communication becomes impossible (step S22), and ends the process if the answer is NO. If the answer in step S22 is YES, the management device 1 transmits warning information to the mobile communication system as a request to establish a dedicated fixed channel (step S23), notifies the situation information as well (step S24), and ends the process. Note that steps S23 and S24 may be simultaneous.

[0067] As illustrated in step S15 of FIG. 9 and step S23 of FIG. 10, the management device 1 can transmit warning information as a request to set (establish) a dedicated fixed channel. This transmission can be executed by the request transmission unit 1b in FIG. 1.

[0068] Although the example of the channel establishment sequence in the management device 1 has been described in FIGS. 9 and 10, these are merely examples and are not limited thereto. As long as it is possible to request channel establishment from the mobile communication system based on the information on the operability (operability information) of the wireless facilities (wireless station 3 and line control device 2) provided in the public wireless system, that is sufficient.

[0069] The communication management device 5 can open a dedicated fixed channel in response to a request from the management device 1 as described above, and can also be configured to close (terminate) it as described later. However, in the mobile communication system, the opening / closing operation can also be performed in response to a request from a public organization (such as a public autonomous body) that operates this radio system other than the request from the management device 1, thereby performing the opening / closing process. Alternatively, in the mobile communication system, it is possible to receive emergency reports such as earthquake information, flood information, and large-scale fire information, and in conjunction with the emergency reports, open / close a dedicated fixed channel for the corresponding public radio system. Note that on the mobile communication terminal 7 side, there is no need to worry about the opening or closing of the dedicated fixed channel as long as the status information can be received by SMS without any particular operation.

[0070] The above description was based on the premise that the information regarding the warning is obtained by any one of the management device 1, the line control device 2, and the radio station 3. However, the information regarding the warning can also be obtained from the user of the radio terminal 4. An example of this will be described below.

[0071] The user of the radio terminal 4 can use the mobile communication terminal 7 that he / she uses to transmit the status information at the radio station 3 through uplink data transmission using the public communication network of the mobile communication system. As a configuration therefor, the management device 1 includes a receiving unit that receives, from the mobile communication terminal 7 via the mobile communication system, other status information indicating the radio communication status at the radio station 3. The determination unit 1a determines whether or not to distribute the status information based on the other status information.

[0072] Upward data can be acquired by the communication management device 5 and passed to the management device 1, for example, by connecting the mobile communication terminal 7 and the wireless terminal 4 using a short-range wireless communication method such as Wi-Fi (registered trademark) or Bluetooth (registered trademark), and polling from the mobile communication terminal 7 side. The upward data can include, for example, the station number (ID), RSSI information, single mode / folded mode, battery level of the waiting radio station 3, and the battery level of the wireless terminal 4. Here, RSSI is an abbreviation for Received Signal Strength Indicator. Also, the battery level information of the radio station 3 can be used to estimate the operating time of the radio station 3, and the battery level of the wireless terminal 4 can be used to estimate the maximum operable time of the wireless terminal 4.

[0073] Based on this, the communication status of a radio station 3 that cannot be determined on the management device 1 side (for example, a radio station 3 that is included in the management device 1 or is away from the control station connected to the management device 1) can be updated on the management device 1 side based on the information from the radio station 3 side. That is, the management device 1 can grasp the wireless communication available area with more certainty.

[0074] Next, with reference to FIG. 11, an example of presenting status information in the mobile communication terminal 7 will be described. FIG. 11 is a schematic diagram showing an example of the status information displayed on the mobile communication terminal 7 in the communication system according to the present embodiment.

[0075] As illustrated in FIG. 11, the mobile communication terminal 7 can have a display unit as the presentation unit 72 and can display information indicating the wireless communication available area as the information 73. The information presented by the mobile communication terminal 7 preferably includes not only the wireless communication available area as character information but also the information distributed to the pre-stored map data and the position information plotted in a state where they are included, as illustrated by the information 73.

[0076] This location information can be estimated, for example, from GNSS (Global Navigation Satellite System), waiting information at the wireless station 6 (information based on communication history and location registration information), shooting information obtained by a camera or the like mounted on the mobile communication terminal 7, and the like. Note that GNSS is a general term for satellite positioning systems such as GPS (Global Positioning System), GLONASS (Global Navigation Satellite System), Galileo, and the quasi-zenith satellite system. Here, the quasi-zenith satellite system is QZSS (Quasi-Zenith Satellite System).

[0077] In addition, the information presented by the mobile communication terminal 7 preferably includes a route from the current location of the mobile communication terminal 7, as exemplified by the information 73, and also preferably includes the direction, the moving distance, and the like explicitly. This route is a route for returning to the private communication infrastructure network, which is a public wireless system, and as an example of the route selection condition, for example, it can be set as the shortest route that satisfies the following conditions. Examples of the above conditions include excluding a route that cannot be passed through from the hazard map or the real-time disaster situation. Another example of the above conditions includes excluding a route that cannot be passed through due to the size of the vehicle equipped with the wireless terminal 4 or used by the user of the wireless terminal 4.

[0078] In addition, as an application example of the situation information, when there is a restriction on the operation time zone in the wireless communication available area, it can also be configured to transmit it as the situation information. In this case, examples of the above conditions include excluding the presentation of a route where the communication infrastructure such as the wireless station 6 becomes incommunicable at the expected arrival time of the user of the wireless terminal 4. Also, it is preferable to determine the route to be excluded in consideration of the remaining battery level of the wireless terminal 4.

[0079] As described above, in the present embodiment, it is possible to notify a wireless communication available area by linking a public wireless system and a public communication system. This notification is made by preparing a dedicated fixed channel for each public body in the public communication network in a state where wireless communication at a certain wireless station is impossible or is presumed to be impossible, that is, in an emergency. Thus, in the present embodiment, the operation status of a public wireless system (private communication infrastructure network) such as a wireless communication available area is distributed to the mobile communication terminal 7, and the user of the wireless terminal 4 can know the operation status of the public wireless system to which he / she belongs as the user of the mobile communication terminal 7. Therefore, in the present embodiment, the user can move to a wireless communication available area and perform wireless communication with the wireless terminal 4.

[0080] Next, in various examples as described above, processing when a failure or the like is resolved will be described with reference to FIGS. 12 to 14. FIG. 12 is a schematic diagram for explaining an example of a recovery procedure when recovering from a state where wireless communication cannot be performed by the wireless terminal 4 in the public wireless system of FIG. 4 in the communication system according to the present embodiment.

[0081] As shown in FIG. 12, when recovering from a failure caused by the transmission / reception unit 34 such as a failure recovery of the transmission / reception unit 34, the control unit 33 detects that communication is possible at the transmission / reception unit 34 by receiving recovery information from the transmission / reception unit 34, and transmits the recovery information to the line control device 2. The line control device 2 receives the recovery information and transmits the recovery information to the management device 1. Although these recovery information transmitted and received between the devices can be the same information, they may be different information as long as the information can identify the wireless station 3-1 that has become communicable.

[0082] Upon receiving the restoration information, the management device 1 sends a request to close the dedicated fixed channel targeted at the communication management device 5. The communication management device 5 receives this closure request and sends an instruction to close the dedicated fixed channel for the public wireless system managed by the management device 1 to the radio station 6. The radio station 6 closes the dedicated fixed channel in response. Also, by configuring to send the situation information about the closure request as well so that it can be presented on the mobile communication terminal 7, the user who sees the presentation can determine the area where they communicate with the wireless terminal 4 based on the situation information.

[0083] In the example of FIG. 12, an example is given where a request to close the fixed dedicated channel (closure request) is sent from the management device 1 to the communication management device 5. However, the device that sends the closure request is not limited. For example, the closure request can also be sent directly from the line control device 2 to the communication management device 5. Also, here an example of resolution corresponding to FIG. 6 is given, but the same concept can be applied to examples of resolution corresponding to FIG. 7 or FIG. 8.

[0084] Here, referring to FIGS. 13 and 14, a processing example (an example of a channel closure request sequence) in the management device 1 in response to the reception or detection of the restoration information as described above will be explained. FIG. 13 is a flowchart for explaining one processing example during restoration in the management device 1 of this wireless system, and FIG. 14 is a flowchart for explaining another processing example during restoration in the management device 1 of this public wireless system.

[0085] Referring to FIG. 13, a processing example applied to the example of FIG. 12 will be explained. In this case, the management device 1 receives the restoration information from the line control device 2 (step S31), determines from the restoration information whether the restoration enables wireless communication (step S32), and if the result is NO, the process ends. If the result is YES in step S32, the management device 1 transmits the restoration information as a request to close the fixed dedicated channel to the mobile communication system (step S33), and the process ends. This processing example can also be applied to the example of resolution corresponding to FIG. 7.

[0086] Referring to FIG. 14, a processing example applied to an example of resolution corresponding to FIG. 8 will be described. In this case, the management device 1 detects the resolution of an obstacle in the middle path as recovery, for example, the reconnection of a line in the network N1 (step S41), determines whether it is a recovery that enables wireless communication from the detection result (step S42), and ends the process if the result is NO. If the result is YES in step S42, the management device 1 transmits recovery information to the mobile communication system as a request to close a dedicated fixed channel (step S43), and ends the process.

[0087] As illustrated in step S33 of FIG. 13 and step S43 of FIG. 14, the management device 1 transmits recovery information as a request to cancel the setting of a dedicated fixed channel (a request to close). This transmission is executed by the request transmission unit 1b in FIG. 1.

[0088] Although FIGS. 13 and 14 illustrate examples of the channel closing sequence in the management device 1, these are merely examples and are not limited thereto. It is sufficient that a channel closing request can be made to the mobile communication system from the operation recovery information of the wireless equipment provided in the public wireless system.

[0089] As illustrated in FIGS. 12 and 13, after the determination unit 1a of the management device 1 determines that the distribution of status information is necessary and then determines that the distribution is unnecessary, it is preferable to transmit a cancellation request to cancel the setting of the dedicated fixed channel. This transmission is executed by the request transmission unit 1b as described above. For example, when the request transmission unit 1b detects that the communication related to the radio station 3-1 related to the setting has been restored after the dedicated fixed channel is set, it transmits the detection result as a cancellation request to cancel the setting of the dedicated fixed channel.

[0090] As described above, the management device 1 according to the present embodiment can determine whether to distribute the status information of the private communication infrastructure network from the warning status of the private communication infrastructure network, and automatically execute a request to open or close a dedicated fixed channel of the public communication network of the mobile communication system. The conditions for the opening / closing request can be, for example, the following conditions as described with reference to FIGS. 6 to 14. Of course, it is not limited to this.

[0091] As an example of the conditions for the opening request, for example, it can include the case where the operation of the private communication infrastructure network or the radio equipment stops (not limited to failures or malfunctions, and can also include maintenance), and can be determined based on, for example, when a warning is reported from the radio station 3 or the line control device 2, or their status information. Further, as an example of the conditions for the opening request, the connection state between the management device 1 and the line control device 2 in the private communication infrastructure network can be monitored (health check), and the case where the connection is lost can be included.

[0092] As an example of the conditions for the closing request, for example, it can include the case where the operation of the private communication infrastructure network or the radio equipment resumes (not limited to the resolution of failures or malfunctions, and can also include the end of maintenance), and can be determined based on, for example, when a warning is lifted from the radio station 3 or the line control device 2, or their status information. Further, as an example of the conditions for the closing request, the connection state between the management device 1 and the line control device 2 in the private communication infrastructure network can be monitored (health check), and the case where the connection is restored can be included.

[0093] Above, an example where communication between the wireless terminal 4 and the radio station 3-1 basically becomes impossible has been described. However, as briefly described in the example of FIG. 8, even when there is a possibility that the communication cannot be established, the management device 1 can send a request to open a dedicated fixed channel to the communication management device 5 side, and the same processing can be performed thereafter.

[0094] Next, an example of this wireless system will be given, and specifically, an operation example of the communication system according to the present embodiment will be described.

[0095] As a first application example, an example of line recovery when a failure occurs in a standby base station (corresponding to radio station 3) in a 260 MHz band digital disaster prevention administrative radio system is given as this radio system.

[0096] First, assume that in a state where a mobile station A (radio terminal 4) in a standby state exists in a dedicated line of local government A and base station A (radio station 3), a disaster (such as an earthquake or flood) occurs, and a failure occurs in base station A due to the impact of this disaster. At this time, mobile station A becomes unable to standby due to the failure of base station A, and communication with the upper system becomes impossible.

[0097] In response to a request from management device 1 operated by local government A, communication management device 5 opens a fixed dedicated channel on the public telephone network, and notifies the operation status of the public radio system operated by local government A to mobile communication terminal 7 used by the user of mobile station A via SMS on this fixed dedicated channel. Next, the user of mobile station A receives the SMS on mobile communication terminal 7, and confirms that base station A is in a communication - unavailable state and that base station B adjacent to base station A is communicable. At this time, mobile communication terminal 7 automatically plots the position information on the map data based on the acquired status information and the position information acquired by itself, and presents the shortest route to the area of base station B where it can return to the self - operated infrastructure network in the shortest time. The user moves to the area within the coverage of base station B according to this route, and mobile station A returns to the standby line as a subordinate of base station B.

[0098] As a second application example, an example of the case where this radio system is operated as a fire radio system of a certain fire organization and participates in providing support to the fire radio systems of other public organizations (other fire organizations) is given. First, assume that a large - scale disaster occurs in the area of fire organization A, and the staff of fire organization B wants to participate in the fire radio system of fire organization A as a support force of fire organization A, but the frequency, individual number information, etc. of fire organization A are unknown.

[0099] In this case, in response to a request from the management device 1 operated by the fire organization A, the communication management device 5 opens a dedicated fixed channel on the public telephone network and sends a notification by SMS to the mobile communication terminal 7 used by the staff of the adjacent fire organization via this dedicated fixed channel. Here, various types of information (frequency information, individual numbers, etc., necessity of support) regarding the fire radio system operated by the fire organization A are notified by SMS. The mobile communication terminal 7 automatically plots the location information on the map data based on the acquired situation information and the location information acquired by itself (or the location information of the vehicle in which the staff of the fire organization B is riding), and presents the shortest route through which it can access the fire radio system of the fire organization A in the shortest time. The staff of the fire organization B moves to the area within the coverage of the base station in the fire radio system of the fire organization A according to this route, refers to the above various types of information (frequency information, individual numbers, etc., necessity of support), and secures a standby line as a subordinate of this base station with the mobile station (radio terminal 4) that they hold.

[0100] Even when line failures, detection of emergency information, etc. are not performed as in the second operation example, the communication system according to the present embodiment can be applied.

[0101] <Other Embodiments> Each device according to Embodiments 1 and 2 (including the radio terminal 4, radio stations 3 and 6, and mobile communication terminal 7) can all have the following hardware configuration. FIG. 15 is a diagram showing an example of the hardware configuration included in the device.

[0102] The device 100 shown in FIG. 15 can have a processor 101, a memory 102, and a wireless communication interface 103, and can also have a wired communication interface as necessary. In each device, the functions of the device can be realized by the processor 101 reading the program stored in the memory 102 and executing it in cooperation with the wireless communication interface 103 and the wired communication interface.

[0103] In the above example, each program can be stored using various types of non-transitory computer readable media and supplied to a computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer readable media include magnetic recording media (such as flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (such as magneto-optical disks). Further, this example includes CD-ROM (Read Only Memory), CD-R, CD-R / W. Further, this example includes semiconductor memories (such as mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)). Also, the program may be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. Transitory computer readable media can supply the program to the computer via wired communication channels such as electric wires and optical fibers, or wireless communication channels.

[0104] Note that the present disclosure is not limited to the above embodiments, and can be appropriately changed without departing from the gist. Also, the present disclosure may be implemented by appropriately combining each embodiment.

[0105] Some or all of the above embodiments can be described as follows in the appended claims, but are not limited thereto. <Appended Claims>

[0106] (Appended Claim 1) Distribution of status information indicating a wireless communication status in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, for distribution to the mobile communication terminal via a mobile communication system that provides a mobile communication service to the mobile communication terminal, a determination unit that determines the necessity thereof; When the determination unit determines that the distribution is necessary, a request transmission unit that transmits to the mobile communication system a request to set a fixed dedicated channel fixed specifically for the public wireless system within the public communication network used by the mobile communication system, An information transmission unit that transmits the situation information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system, A management device comprising: (Appendix 2) When the determination unit receives warning information indicating that wireless communication is impossible at a wireless station of the public wireless system, it determines that the distribution is necessary, The information transmission unit transmits, as the situation information, information indicating a radio wave reception possible area for a wireless station that is currently communicable in the public wireless system, which is different from the wireless station related to the warning information. The management device according to Appendix 1. (Appendix 3) When the determination unit receives warning information indicating that communication with a wireless station of the public wireless system is impossible, it determines that the distribution is necessary, The information transmission unit transmits, as the situation information, information indicating a radio wave reception possible area for a wireless station that is currently communicable in the public wireless system, which is different from the wireless station related to the warning information. The management device according to Appendix 1 or 2. (Appendix 4) When the determination unit receives, in the public wireless system, warning information indicating the occurrence of a disaster that makes wireless communication impossible at a wireless station of the public wireless system, it determines that the distribution is necessary. The information transmission unit transmits, as the situation information, information indicating a radio wave reception possible area for a wireless station that is currently communicable in the public wireless system, which is different from the wireless station related to the warning information. The management device according to any one of Appendices 1 to 3. (Appendix 5) The request transmission unit transmits the warning information as the request. The management device according to any one of Supplementary Notes 2 to 4. (Supplementary Note 6) After the distribution is determined to be necessary by the determination unit, when the distribution is determined to be unnecessary, the request transmission unit transmits a cancellation request to cancel the setting of the dedicated fixed channel. The management device according to any one of Supplementary Notes 1 to 5. (Supplementary Note 7) After the dedicated fixed channel is set, when the request transmission unit detects that the communication related to the wireless station related to the setting has been restored, the request transmission unit transmits the detection result as a cancellation request to cancel the setting of the dedicated fixed channel. The management device according to any one of Supplementary Notes 2 to 5. (Supplementary Note 8) The management device further includes a receiving unit that receives other status information indicating the wireless communication status at the wireless station from the mobile communication terminal via the mobile communication system. The determination unit determines whether the distribution is necessary based on the other status information. The management device according to any one of Supplementary Notes 1 to 7. (Supplementary Note 9) A control unit that manages mobile communication in a mobile communication system that provides a mobile communication service to a mobile communication terminal, A receiving unit that receives status information indicating the wireless communication status in the public wireless system and a request for distribution of the status information from a management device that manages a wireless station in a public wireless system that performs wireless communication with a wireless terminal, A transmission unit that transmits the status information to the mobile communication terminal, and includes The control unit sets a dedicated fixed channel fixed for the public wireless system in a public communication network used in the mobile communication system in response to the request. The transmission unit transmits the status information to the mobile communication terminal via the dedicated fixed channel. Communication management device. (Supplementary Note 10) A communication unit that communicates with a mobile communication system that provides a mobile communication service, A presentation unit, and includes The communication unit is set to be fixed specifically for a public wireless system having a radio station that performs wireless communication with a wireless terminal in the mobile communication system, and receives status information indicating the wireless communication status in the public wireless system on a fixed dedicated channel, The presentation unit presents information indicating an area where radio waves can be received from a radio station that can currently communicate in the public wireless system according to the wireless communication status indicated by the status information. Mobile communication terminal. (Appendix 11) A wireless terminal, a management device that manages communication in a public wireless system having a radio station that performs wireless communication with the wireless terminal, a mobile communication terminal, and a communication management device that manages communication in a mobile communication system that provides a mobile communication service to the mobile communication terminal, The management device includes a determination unit that determines the necessity of distributing status information indicating the wireless communication status in the public wireless system to the mobile communication terminal via the mobile communication system, and when the determination unit determines that the distribution is necessary, a request transmission unit that transmits a request to set a fixed dedicated channel fixed specifically for the public wireless system in a public communication network used by the mobile communication system, and an information transmission unit that transmits the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system. The communication management device includes a first reception unit that receives the status information and a request for distribution of the status information from the management device, a setting unit that sets the fixed dedicated channel fixed specifically for the public wireless system in the public communication network according to the request, and a transmission unit that transmits the status information to the mobile communication terminal on the fixed dedicated channel. The mobile communication terminal includes a second reception unit that receives the status information on the fixed dedicated channel, and a presentation unit that presents information indicating an area where radio waves can be received from a radio station that can currently communicate in the public wireless system according to the wireless communication status indicated by the status information. Communication system. (Appendix 12) A management device that manages communication in a public wireless system having a wireless station that performs wireless communication with a wireless terminal performs distribution of status information indicating the wireless communication status in the public wireless system, and determines the necessity for distribution to the mobile communication terminal via a mobile communication system that provides a mobile communication service to the mobile communication terminal. When the management device determines that the distribution is necessary, the management device transmits a request to the mobile communication system to set a fixed dedicated channel fixed specifically for the public wireless system in a public communication network used by the mobile communication system. The management device transmits the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system. A management method comprising the above. (Appendix 13) A communication management device that manages communication in a mobile communication system that provides a mobile communication service to a mobile communication terminal receives status information indicating the wireless communication status in a public wireless system and a request for distribution of the status information from a management device that manages a wireless station in the public wireless system that performs wireless communication with a wireless terminal. In response to the request, the communication management device sets a fixed dedicated channel fixed specifically for the public wireless system in a public communication network used by the mobile communication system. The communication management device transmits the status information to the mobile communication terminal on the fixed dedicated channel. A communication management method comprising the above. (Appendix 14) A mobile communication terminal capable of communicating with a mobile communication system that provides a mobile communication service receives status information indicating the wireless communication status in the public wireless system on a fixed dedicated channel set to be fixed specifically for the public wireless system in the mobile communication system. The mobile communication terminal presents information indicating an area where radio waves can be received from a wireless station that can currently communicate in the public wireless system according to the wireless communication status indicated by the status information. An information presentation method comprising (Appendix 15) In a computer that manages communication in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, a step of determining the necessity of distributing status information indicating the wireless communication status in the public wireless system, for distribution to the mobile communication terminal via a mobile communication system that provides a mobile communication service to the mobile communication terminal; when it is determined that the distribution is necessary, a step of transmitting a request to the mobile communication system to set a fixed dedicated channel fixed specifically for the public wireless system in a public communication network used by the mobile communication system; a step of transmitting the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system; A program for causing the above to be executed. (Appendix 16) In a computer that manages communication in a mobile communication system that provides a mobile communication service to a mobile communication terminal, a step of receiving status information indicating the wireless communication status in the public wireless system and a request for distribution of the status information from a management device that manages a wireless station in the public wireless system that performs wireless communication with a wireless terminal; a step of setting, in response to the request, a fixed dedicated channel fixed specifically for the public wireless system in a public communication network used by the mobile communication system; a step of transmitting the status information to the mobile communication terminal on the fixed dedicated channel; A program for causing the above to be executed. (Appendix 17) In a computer mounted on a mobile communication terminal capable of communicating with a mobile communication system that provides a mobile communication service, a step of receiving status information indicating the wireless communication status in the public wireless system on a fixed dedicated channel set to be fixed specifically for a public wireless system having a wireless station that performs wireless communication with a wireless terminal in the mobile communication system; A step of presenting information indicating an area where radio waves can be received from a radio station that can currently communicate in the public radio system according to the radio communication situation indicated by the situation information. A program for causing the execution.

Explanation of Signs

[0107] 1 Management device 1a Determination unit 1b Request transmission unit 1c Information transmission unit 2 Line control device 3, 3-1, 3-2 Radio stations (radio stations of the public radio system) 4 Wireless terminal 5 Communication management device 6 Radio station (radio station of the mobile communication system) 7 Mobile communication terminal 51 Control unit 52 Receiver 53 Transmitter 71 Communication unit 72 Presentation unit 73 Information 100 Device 101 Processor 102 Memory 103 Wireless communication interface

Claims

1. Distribution of status information indicating a wireless communication status in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, for distribution to the mobile communication terminal via a mobile communication system that provides a mobile communication service to the mobile communication terminal, a determination unit that determines the necessity thereof; When the determination unit determines that the distribution is necessary, a request transmission unit that transmits a request to the mobile communication system to set a fixed dedicated channel fixed specifically for the public wireless system within a public communication network used by the mobile communication system; An information transmission unit that transmits the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system; Comprising; When the determination unit receives warning information indicating that wireless communication is impossible at a wireless station included in the public wireless system, the determination unit determines that the distribution is necessary; The information transmission unit transmits, as the status information, information indicating a radio wave reception possible area for a wireless station that is currently communicable in the public wireless system, which is different from the wireless station related to the warning information; Management device.

2. Distribution of status information indicating a wireless communication status in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, for distribution to the mobile communication terminal via a mobile communication system that provides a mobile communication service to the mobile communication terminal, a determination unit that determines the necessity thereof; When the determination unit determines that the distribution is necessary, a request transmission unit that transmits a request to the mobile communication system to set a fixed dedicated channel fixed specifically for the public wireless system within a public communication network used by the mobile communication system; An information transmission unit that transmits the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system; Comprising; When the determination unit receives warning information indicating that communication with a wireless station included in the public wireless system is impossible, the determination unit determines that the distribution is necessary; The information transmission unit transmits, as the status information, information indicating a radio wave reception possible area for a wireless station that is currently communicable in the public wireless system, which is different from the wireless station related to the warning information; Management device.

3. Distribution of status information indicating the wireless communication status in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, regarding the distribution to the mobile communication terminal via a mobile communication system that provides a mobile communication service to the mobile communication terminal, a determination unit that determines the necessity thereof; When the determination unit determines that the distribution is necessary, a request transmission unit that transmits a request to the mobile communication system to set a fixed dedicated channel fixed specifically for the public wireless system within the public communication network used by the mobile communication system; An information transmission unit that transmits the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system; Comprising; When the determination unit receives warning information indicating the occurrence of a disaster such that wireless communication cannot be executed in the wireless station of the public wireless system in the public wireless system, the determination unit determines that the distribution is necessary; The information transmission unit transmits, as the status information, information indicating a radio wave receivable area for a wireless station that can currently communicate in the public wireless system, which is different from the wireless station related to the warning information; Management device.

4. The request transmission unit transmits the warning information as the request; The management device according to any one of Claims 1 to 3.

5. Distribution of status information indicating the wireless communication status in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, regarding the distribution to the mobile communication terminal via a mobile communication system that provides a mobile communication service to the mobile communication terminal, a determination unit that determines the necessity thereof; When the determination unit determines that the distribution is necessary, a request transmission unit that transmits a request to the mobile communication system to set a fixed dedicated channel fixed specifically for the public wireless system within the public communication network used by the mobile communication system; An information transmission unit that transmits the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system; Comprising; After the determination unit determines that the distribution is necessary, when it is determined that the distribution is unnecessary, the request transmission unit transmits a cancellation request to cancel the setting of the fixed dedicated channel; Management device.

6. After the dedicated fixed channel is set, when the request transmission unit detects that the communication with the wireless station related to the setting has been restored, it transmits the detection result as a release request to cancel the setting of the dedicated fixed channel. The management device according to any one of claims 1 to 5.

7. A wireless terminal, a management device that manages communication in a public wireless system having a wireless station that performs wireless communication with the wireless terminal, a mobile communication terminal, and a communication management device that manages communication in a mobile communication system that provides a mobile communication service to the mobile communication terminal. The management device includes a determination unit that determines the necessity of distributing status information indicating the wireless communication status in the public wireless system to the mobile communication terminal via the mobile communication system, and when the determination unit determines that the distribution is necessary, a request transmission unit that transmits a request to set a dedicated fixed channel fixed for the public wireless system in a public communication network used by the mobile communication system, and an information transmission unit that transmits the status information for distribution to the mobile communication terminal on the dedicated fixed channel to the mobile communication system. When the determination unit receives warning information indicating that wireless communication is impossible in a wireless station included in the public wireless system, it determines that the distribution is necessary. The information transmission unit transmits, as the status information, information indicating a radio wave reception possible area of a wireless station that can currently communicate in the public wireless system, which is different from the wireless station related to the warning information. The communication management device includes a first reception unit that receives the status information and the request for distribution of the status information from the management device, a setting unit that sets the dedicated fixed channel fixed for the public wireless system in the public communication network in response to the request, and a transmission unit that transmits the status information to the mobile communication terminal on the dedicated fixed channel. The mobile communication terminal includes a second reception unit that receives the status information on the dedicated fixed channel, and a presentation unit that presents information indicating a radio wave reception possible area from a wireless station that can currently communicate in the public wireless system according to the wireless communication status indicated by the status information. Communication system.

8. A management device that manages communication in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, for distribution of status information indicating the wireless communication status in the public wireless system, determines the necessity for distribution to the mobile communication terminal via a mobile communication system that provides mobile communication services to the mobile communication terminal, a determination step; When the management device determines that the distribution is necessary, a first transmission step of transmitting a request to set a fixed dedicated channel fixed for the public wireless system in a public communication network used by the mobile communication system to the mobile communication system; A second transmission step of transmitting the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system; comprising; In the determination step, when receiving warning information indicating that wireless communication is impossible in a wireless station included in the public wireless system, it is determined that the distribution is necessary; In the second transmission step, as the status information, information indicating a radio wave receivable area for a wireless station that is currently communicable in the public wireless system, which is different from the wireless station related to the warning information, is transmitted. Management method.

9. A management device that manages communication in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, for distribution of status information indicating the wireless communication status in the public wireless system, determines the necessity for distribution to the mobile communication terminal via a mobile communication system that provides mobile communication services to the mobile communication terminal, a determination step; When the management device determines that the distribution is necessary, a first transmission step of transmitting a request to set a fixed dedicated channel fixed for the public wireless system in a public communication network used by the mobile communication system to the mobile communication system; A second transmission step of transmitting the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system; comprising; In the determination step, when receiving warning information indicating that communication with a wireless station included in the public wireless system is impossible, it is determined that the distribution is necessary; In the second transmission step, as the status information, information indicating a radio wave receivable area for a wireless station that is currently communicable in the public wireless system, which is different from the wireless station related to the warning information, is transmitted. Management method.

10. In a computer that manages communication in a public wireless system having a wireless station that performs wireless communication with a wireless terminal, a determination step of determining the necessity of distribution of status information indicating the wireless communication status in the public wireless system, for distribution to the mobile communication terminal via a mobile communication system that provides a mobile communication service to the mobile communication terminal; a first transmission step of transmitting, to the mobile communication system, a request to set a fixed dedicated channel fixed specifically for the public wireless system within a public communication network used by the mobile communication system when it is determined that the distribution is necessary; a second transmission step of transmitting the status information for distribution to the mobile communication terminal on the fixed dedicated channel to the mobile communication system; a process including: the determination step determines that the distribution is necessary when receiving warning information indicating that wireless communication is impossible at a wireless station included in the public wireless system; the second transmission step transmits, as the status information, information indicating a radio wave receivable area for a wireless station that is currently communicable in the public wireless system, which is different from the wireless station related to the warning information; A program for executing the process.

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