JP2007259371A - Radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication system which has a moving body with radio equipment and makes it easy to communicate among a plurality of persons existing in the moving body. <P>SOLUTION: The moving body includes a plurality of communication terminals 51 and 52, a radio communication means 54 conducts a radio communication processing between one (for example, a handset 51) or more of the plurality of communication terminals 51 and 52 and an external apparatus, an internal communication means 53 conducts a communication processing among two or more communication terminals 51 and 52 of the plurality of communication terminals 51 and 52, and a switching means 61 switches a state that a radio communication is conducted by the radio communication means 54 with a state that a communication is conducted by the internal communication means 53. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wireless communication system having a mobile body provided with wireless equipment, and more particularly to a wireless communication system that facilitates communication among a plurality of persons existing in the mobile body.

  For example, in a firefighting digital wireless system, which is an example of a disaster prevention digital wireless system, a wireless facility is installed in a vehicle such as a fire engine or an ambulance, and a person existing in the vehicle and a person existing in an external disaster prevention center, etc. In this case, wireless communication is performed (for example, see Non-Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 9-172661 ARIB STD-T61, “Narrowband Digital Communication System (SCPC / FDMA)”, Japan Radio Industry Association ARIB STD-T79, "Municipal digital mobile communication system", Japan Radio Industry Association

However, the system as described above is still insufficiently studied, and further development is required. In particular, it was necessary to improve communication between a plurality of persons existing in the vehicle.
The present invention has been made in view of such a conventional situation, and an object of the present invention is to provide a wireless communication system that can facilitate communication among a plurality of persons existing in a mobile object.

In order to achieve the above object, the wireless communication system according to the present invention has the following configuration.
That is, the wireless communication system has a moving body.
The mobile body includes a plurality of communication terminals, wireless communication means, internal communication means, and switching means.
The wireless communication means executes a wireless communication process between one or more communication terminals of the plurality of communication terminals and an external device. The internal communication means executes communication processing between two or more communication terminals of the plurality of communication terminals. The switching unit switches between a state in which wireless communication by the wireless communication unit is performed and a state in which communication by the internal communication unit is performed.

  Accordingly, in a mobile body, a state in which wireless communication is performed between a communication terminal and an external device and a state in which communication terminals communicate with each other can be switched. For example, communication between a plurality of persons existing in a mobile body In particular, it is possible to exert a great effect in a fire engine or an ambulance.

Here, various things may be used as a mobile body, for example, it can apply to motor vehicles, trains, ships, etc., such as a fire engine and an ambulance.
Various numbers of communication terminals may be used.
Each communication terminal has, for example, one or both of a function of transmitting a microphone or the like and a function of receiving a speaker or the like, and includes a handset as an example.
Further, for example, each of the plurality of communication terminals is installed at a different position in the moving body, and as a preferred embodiment, a person in the moving body may communicate with another person through the communication terminal instead of directly. Installed at the required position.
As an example, inside a mobile body, one communication terminal can be installed at a front position, another communication terminal can be installed at a rear position, and a telephone call can be made between these persons who are located apart from each other. .

Various devices may be used as an external device that performs wireless communication with a communication terminal, such as a base station device.
In addition, the number of communication terminals that simultaneously perform wireless communication with an external device may be, for example, one, or two or more. In this case, for example, two or more One of the communication terminals performs transmission, and all the communication terminals perform reception.
In addition, the number of communication terminals when performing communication between two or more communication terminals may be two or three or more. In this case, for example, three One of the two or more communication terminals performs transmission, and all the communication terminals perform reception.
In addition, the process of switching between the wireless communication state and the internal communication state may be performed, for example, in response to reception of a predetermined operation by a person, or a predetermined condition for switching the state is satisfied. Depending on the situation, it may be performed automatically by the apparatus.

In the radio communication system according to the present invention, as one configuration example, the mobile unit has the following configuration.
That is, the plurality of communication terminals include a first communication terminal and a second communication terminal provided at positions separated from each other in the mobile body.
In the first communication terminal, the first request means requests communication with the second communication terminal.
In the second communication terminal, the second request means requests communication with the first communication terminal.
Then, in response to a request from the first communication terminal or a request from the second communication terminal, the switching means switches to a state in which communication by the internal communication means is performed, and the internal communication means The communication process between the communication terminal and the second communication terminal is executed.

Therefore, it is possible to start communication with the second communication terminal from the first communication terminal, and to start communication with the first communication terminal from the second communication terminal. Two-way communication within the body can be realized.
Here, as a mode of requesting internal communication from the communication terminal, for example, the communication terminal accepts a predetermined operation for requesting internal communication from a person, and notifies the switching means or internal communication means that the operation has been accepted. A mode of notifying can be used.

In the radio communication system according to the present invention, as one configuration example, the mobile unit has the following configuration.
That is, the switching means is composed of a circuit for processing a digital signal, and executes the switching by digital processing.

Therefore, for example, processing can be facilitated as compared with the case where switching is performed by analog processing. Further, for example, it is possible to save space by providing a switching function inside the digital radio equipment.
Here, as a circuit constituting the switching unit, for example, a field programmable gate array (FPGA) or a central processing unit (CPU) can be used.

The radio communication system according to the present invention has the following configuration as an example configuration.
That is, the mobile body includes a radio equipment body installed on the mobile body, and a portable radio device that is detachable from the radio equipment body.
In the portable wireless device, portable wireless communication means executes wireless communication processing with the external device.
In addition, the same information is set as call information from the external device in the wireless equipment body and the portable wireless device.

Therefore, for example, in a firefighting digital wireless system in which a mobile body provided in a manner in which the wireless equipment body and the portable wireless device are detachable is used, a state in which wireless communication between a person existing in the mobile body and the outside is performed, It is possible to switch the state of performing communication between persons existing in the body, and it is possible to realize contact communication inside the mobile body.
As an example, the wireless equipment body includes a plurality of communication terminals, wireless communication means, internal communication means, and switching means. As another example, a configuration in which one or more of a plurality of communication terminals are provided in a portable wireless device can be used. For example, the transmission function and the reception function of the portable wireless device and the function of the communication terminal are shared. Is possible.
Various information may be used as calling information for the wireless equipment body or the portable wireless device, for example, telephone number information or the like.

The present invention can also be provided as a method.
As an example, in the communication method according to the present invention, communication is performed by a communication device (mobile station device) provided in a mobile body with the following configuration.
That is, a state in which wireless communication processing is performed between one or more communication terminals of a plurality of communication terminals included in the communication apparatus and an external device, and two or more communication of the plurality of communication terminals The communication process between the terminals is switched to a state in which the communication process is executed, and the communication process in the switched state is executed.

  As described above, according to the wireless communication system and the like according to the present invention, the mobile unit performs a wireless communication process between one or more of the plurality of communication terminals and an external device. Since the state of executing communication processing between two or more of the plurality of communication terminals is switched, for example, communication between a plurality of persons existing in a mobile object is facilitated. In particular, a great effect can be exhibited in a fire engine or an ambulance.

Embodiments according to the present invention will be described with reference to the drawings.
First, an example of a system to which the present invention can be applied will be described with reference to FIGS.
FIG. 1 shows a configuration example of a fire fighting digital radio system which is an example of a disaster prevention digital radio system.
The firefighting digital wireless system of this example includes a command device (command console) 1 having an operation unit 11, a display unit 12, and a storage unit 13, a line control device (wireless line control device) 2, and a plurality of n bases. There are provided station apparatuses A1 to An, a plurality of n remote controllers B1 to Bn, and a plurality of m mobile station apparatuses C1 to Cm.
Each of the mobile station devices C1 to Cm is composed of an in-vehicle device 21 and a portable device 22, and has a table 23 on which the portable device 22 is placed.

The firefighting digital wireless system of this example can be used for regional disaster prevention in each prefecture such as Tokyo. In this example, the command device 1 and the line control device 2 are installed in the disaster prevention center, and the base station devices A1 to An are installed in the fire station, on the building, outside the city, on the mountain, etc. The controllers B1 to Bn are installed in the fire department, and the mobile station devices C1 to Cm are installed in a vehicle such as a fire engine or an ambulance.
In each vehicle, for example, the in-vehicle device 21 and the table 23 are mounted and attached to each vehicle, and the portable device 22 can be carried by a person or placed on the table 23.
It is to be noted that a plurality of systems similar to those shown in FIG. 1 are provided, and one of the systems is operated and another system is kept in standby, and the spare system is operated when the operating system fails. Therefore, it is possible to adopt a configuration in which the entire operation is continued.
Various devices such as a fixed device, a semi-fixed device, a portable device, and a portable device may be used as subordinate devices that communicate with the base station devices A1 to An.

The outline | summary of the operation | movement performed in the firefighting digital radio system of this example is shown.
In the command device 1, the operation unit 11 is operated by a person (commander) to input various instructions and information, and the display unit 12 displays and outputs various information to be displayed on the screen. The stored storage unit 13 stores various information to be stored.
The commander can transmit various instructions from the command device 1 to the devices under its control (line control device 2, base station devices A1 to An, remote controllers B1 to Bn, mobile station devices C1 to Cm). Further, the commander can view various information received by the commanding device 1 from the devices under its control on the screen display. Necessary information is held in the storage unit 13.

The line control device 2 is connected to the command device 1 and a plurality of base station devices A1 to An, for example, by wire, relays communication between them, and performs various controls relating to a wireless line and the like.
Each of the base station devices A1 to An communicates wirelessly with the mobile station devices C1 to Cm existing in a communicable area (area) and communicates with each of the remote controllers B1 to Bn connected by wire. Communicate between.
Each of the remote controllers B1 to Bn communicates with each of the base station devices A1 to An connected by wire, and has, for example, the same function as the mobile station device, and is operated by a person (signer). Is done.
Each of the mobile station devices C1 to Cm communicates wirelessly with the base station devices A1 to An in which the mobile station devices C1 to Cm are accommodated.

In FIG. 2, the structural example of the vehicle equipment 21 and the structural example of the portable device 22 are shown.
The in-vehicle device 21 includes an antenna 31, a radio unit 32, a key operation unit 33, a display unit 34, a microphone unit 35 having a microphone, a speaker unit 36 having two speakers, a memory 37, and a portable interface. 38 and a control unit 39.
The portable device 22 includes an antenna 41, a wireless unit 42, a key operation unit 43, a display unit 44, a microphone unit 45 having a microphone, a speaker unit 46 having a speaker, a memory 47, an in-vehicle interface 48, A control unit 49 is provided.
Here, the internal processing function of the in-vehicle device 21 and the internal processing function of the portable device 22 are generally the same, although there are differences, for example, the number of speakers is different.

  In the in-vehicle device 21, the wireless unit 32 wirelessly transmits and receives signals to and from the base station apparatuses A <b> 1 to An through the antenna 31, the key operation unit 33 receives a key operation from a person (user), and the display unit 34 displays information on the screen for the user, the microphone unit 35 inputs sound (sound) emitted by the user or the like, the speaker unit 36 outputs sound (sound) to the user, and the memory 37 stores, for example, call information (ID information) as a telephone number to be called, the portable interface 38 communicates with the in-vehicle interface 48 of the portable device 22 by, for example, an optical signal, and the control unit 39 performs various controls. I do.

  Similarly, in the portable device 22, the wireless unit 42 wirelessly transmits and receives signals to and from the base station apparatuses A <b> 1 to An through the antenna 41, and the key operation unit 43 receives a key operation from a person (user). The display unit 44 displays information to the user on the screen, the microphone unit 45 inputs sound (sound) emitted by the user, and the speaker unit 46 outputs sound (sound) to the user. Then, the memory 47 stores, for example, call information (ID information) that is a telephone number to be called, the in-vehicle interface 48 communicates with the portable interface 38 of the in-vehicle device 21 by, for example, an optical signal, and the control unit 49 Perform various controls.

Here, the same information is set as the call information (ID information) stored in the memory 37 of the in-vehicle device 21 and the call information (ID information) stored in the memory 47 of the portable device 22.
The in-vehicle device 21 and the portable device 22 can communicate between the portable interface 38 and the in-vehicle interface 48 in a state where the portable device 22 is placed on the pedestal 23. Communication is not performed between the portable interface 38 and the vehicle-mounted interface 48 in a state where the portable interface 38 is removed from the table 23 and carried.

In this example, in a state where the portable device 22 is set (placed) on the pedestal 23, the portable device 22 does not particularly function, and reception from the base station devices A1 to An or base station devices A1 to An are performed. Transmission, key input, display output, voice input, voice output, and the like are all performed by the in-vehicle device 21.
On the other hand, in a state in which the portable device 22 is detached from the table 23, the portable device 22 receives from the base station devices A1 to An, transmits to the base station devices A1 to An, key input, display output, and audio. Input, audio output, and the like are all performed. In this state, the vehicle-mounted device 21 performs only reception from the base station devices A1 to An, display output, and audio output. That is, the same call information (ID information) is set in the in-vehicle device 21 and the portable device 22, and reception can be performed simultaneously in both, but transmission is performed one by one.

In addition, the portable device 22 removed from the pedestal 23 performs wireless communication directly with the base station devices A1 to An without using the in-vehicle device 21. This point is considered to be different from a handset of a normal parent-child phone.
In addition, the state in which the portable device 22 is set on the table 23 or the state in which the portable device 22 is removed from the table 23 is detected by the in-vehicle device 21 or the portable device 22 and is controlled by the respective control units 39 and 49 according to the state at that time. Executable functions (or non-executable functions) are set.

The in-vehicle device 21 has two speakers. For example, when the portable device 22 is detached from the pedestal 23, the contents of a call transmitted from the base station devices A <b> 1 to An to the portable device 22 are one. The voice of the call transmitted from the portable device 22 to the base station apparatuses A1 to An is output from the other speaker.
As an example, mobile station devices C1 to Cm are provided in a fire truck or the like, and the fire truck or the like is at a site such as a fire, and a member goes out of the fire truck or the like with a portable device 22. When other members are active and wait inside the fire engine or the like, the other members listen to the sound output from the vehicle-mounted device 21, so that the portable device 22 and the base station devices A1 to An are connected. You can listen to the content of calls made at.
Note that, for example, different frequencies are used for downlink communication from the base station devices A1 to An to the mobile station devices C1 to Cm and uplink communication from the mobile station devices C1 to Cm to the base station devices A1 to An. .

  In addition, as communication between the base station devices A1 to An (for example, the command device 1) and the mobile station devices C1 to Cm, for example, a configuration in which press talk communication is performed may be used. A configuration in which two-way simultaneous communication such as a normal mobile phone is performed may be used, or a configuration in which communication in another mode is performed may be used. Further, information for notification is transmitted from the base station devices A1 to An to the mobile station devices C1 to Cm, and the mobile station devices C1 to Cm (automatically) receive the information in response to the reception of the information. A configuration that outputs data can also be used.

In the case of a fire engine, for example, press talk communication is used, the mobile station devices C1 to Cm of a plurality of fire engines are called from the command device 1, and group communication (for example, group communication on a business link) is performed. By carrying out a press talk communication in the inside, it is possible to perform the same fire site treatment by these plural fire engines.
In the case of an ambulance, for example, communication such as a normal telephone is used, and a call can be performed by speaking (calling) and receiving.
In addition, for example, the vehicle-mounted device 21 and the portable device 22 can be provided with a function capable of performing wireless communication even at a distance between the vehicle-mounted device 21 and the portable device 22. In this case, as an example, when the portable device 22 is taken out of the vehicle in a dead zone such as in a tunnel, the in-vehicle device 21 and the portable device 22 can be used to communicate with each other using a transceiver.

In the following embodiments, examples of devices that can be applied to the mobile station devices C1 to Cm provided in vehicles such as fire engines and ambulances will be shown.
Schematically, a vehicle is provided with wireless equipment at a front seat or the like, a first handset is provided at a front seat, and a second handset is provided at a rear seat. Then, a person in the front seat uses the first handset, and a person in the back seat uses the second handset, thereby making a call between these persons. In addition, wireless communication can be performed between the first handset or the second handset and an external base station apparatus.

The first handset is provided, for example, in the passenger seat next to the driver seat.
Also, in fire engines and ambulances, the front seat and the back seat are often separated, and it is often difficult to have a direct conversation between people in these seats.
For example, a handset having a microphone and a speaker is used. However, as another configuration example, only a microphone or only a speaker can be used.
Further, in the following embodiments, although detailed description is omitted, the radio equipment is composed of a main body (on-vehicle device) and a portable device as shown in FIG. 1 and FIG. In the following embodiments, a configuration example and an operation example of a main body (on-vehicle device) are shown as wireless equipment, and illustration and description of the portable device are omitted.

A first embodiment of the present invention will be described.
3 and 4 show a configuration example of the mobile station apparatus of this example.
The mobile station apparatus of the present example includes a telephone handset 51, a speaker 52, a switching box 53, and digital radio equipment 54, and is installed in the same vehicle.
In this example, the handset 51, the switching box 53, and the digital radio equipment 54 are installed in the front part of the vehicle, and the speaker 52 is installed in the rear part of the vehicle.

The handset 51 has a microphone (microphone) 51a and a speaker 51b.
The switch box 53 includes a switch 61 for switching control and an audio signal amplifier (not shown).
The digital radio equipment 54 includes an A / D (Analog to Digital) conversion unit 71, a D / A (Digital to Analog) conversion unit 72, an audio codec unit 73, a digital signal processing unit 74, a transmission / reception unit 75, An antenna 76 is provided.

The changeover switch 61 includes a state in which the microphone 51a of the handset 51 and the A / D converter 71 are connected (state in FIG. 3), and a state in which the microphone 51a of the handset 51 and the speaker 52 are connected (state in FIG. 4). Switch.
Here, the changeover switch 61 may be changed by, for example, a button provided on the changeover box 53 or the handset 51 being operated by a person, or a CPU provided in the digital radio equipment 54 or the like. Switching control may be automatically performed by a control unit (not shown).

An example of the operation performed in the mobile station apparatus of this example is shown.
When wireless communication is performed by the handset 51, the changeover switch 61 of the changeover box 53 is set so that the route illustrated in FIG. 3 is established, and the microphone 51a of the handset 51 and the A / D conversion unit 71 are connected.
A person (user) existing at the front of the vehicle uses the handset 51 to input sound into the microphone 51a and listen to the sound output from the speaker 51b.
In this case, an audio analog signal input to the microphone 51 a of the handset 51 is input to the digital radio equipment 54 via the switching box 53, converted into a digital signal by the A / D conversion unit 71, and then converted by the audio codec unit 73. The audio signal is encoded, modulated by the digital signal processing unit 74, and wirelessly transmitted from the antenna 76 by the transmission / reception unit 75.
A signal (received signal) received by the transmission / reception unit 75 via the antenna 76 is demodulated by the digital signal processing unit 74, decoded by the audio codec unit 73, and converted into an analog signal by the D / A conversion unit 72. It is converted and input to the speaker 51 b of the handset 51. Thereby, the sound included in the received signal is output from the speaker 51 b of the handset 51.

When communicating in the same vehicle from the handset 51 installed at the front of the vehicle to the speaker 52 installed at the rear of the vehicle, for example, the switching box 53 installed at the front of the vehicle When the changeover switch 61 is manually operated by a person, the changeover switch 61 of the changeover box 53 is set so that the route shown in FIG. 4 is obtained, and the microphone 51a and the speaker 52 of the handset 51 are connected.
A person (user) existing at the front of the vehicle uses the handset 51 to input sound into the microphone 51a and listen to the sound output from the speaker 51b.
A person (user) existing at the rear of the vehicle listens to the sound output from the speaker 52.
In this case, an analog audio signal input to the microphone 51 a of the handset 51 is output from the speaker 52 via the switching box 53. Thereby, communication communication is performed from the person at the front of the vehicle to the person at the rear of the vehicle.

  Further, when a signal from a base station device or the like is wirelessly received by the digital wireless equipment 54 during communication between handsets (in this example, from the handset 51 to the speaker 52), as an example, the handsets In this case, it is possible to control the user to output sound, vibration, light, etc. to one or more (or all) handsets to notify the user. The changeover switch 61 can be forcibly switched to a path for performing wireless communication like the path shown in FIG. 3, and the communication between the handsets can be disconnected to enable the wireless communication.

  As described above, in the mobile station device of the present example, the wireless communication is performed with the handset 51 between the external base station device and the like, and the handset 51 installed at the front of the vehicle is installed at the rear of the vehicle. It is possible to switch between the state in which communication is communicated to the speaker 52 within the same vehicle, and work in a fire engine or an ambulance can be made more efficient.

In this example, a vehicle such as a fire engine or an ambulance is used as the moving body, and the moving body is provided with a mobile station device (communication device). The mobile station device can be attached to and detached from the radio equipment body. It is comprised from the portable radio | wireless machine (in this example, illustration is abbreviate | omitted about the portable radio | wireless machine which has a portable wireless communication means).
Further, in the mobile station apparatus of this example, a plurality (two in this example) of communication terminals are configured by the handset 51 and the speaker 52, and the changeover switch of the changeover box 53 that switches between the wireless communication state and the internal communication state. The switching means is configured by the function 61, and the wireless communication means is configured by the functions of the processing units 71 to 76 provided in the digital wireless equipment 54, and is internally connected between the communication terminals via the switching box 53. An internal communication means is configured by the function of performing communication. Further, a request means is constituted by a function for issuing a request for internal communication from the handset 51.

A second embodiment of the present invention will be described.
In this example, the description of the same configuration and operation as in the first example is omitted or simplified.
5 and 6 show configuration examples of the mobile station apparatus of this example.
The mobile station apparatus of this example includes a first handset 81 for calling, a second handset 82 for calling, a switching box 83, and digital radio equipment 84, and is installed in the same vehicle. .
In this example, a first handset 81, a switching box 83, and digital radio equipment 84 are installed at the front of the vehicle, and a second handset 82 is installed at the rear of the vehicle.

The first handset 81 has a microphone 81a and a speaker 81b.
The second handset 82 includes a microphone 82a and a speaker 82b.
The changeover box 83 incorporates changeover switches 91 to 94 for changeover control and an amplifier (not shown) for audio signals.
The digital radio equipment 84 includes a first A / D conversion unit 101, a first D / A conversion unit 102, a first audio codec unit 103, a second A / D conversion unit 104, and a second D / A conversion unit 105, second audio codec unit 106, digital signal processing unit 107, transmission / reception unit 108, and antenna 109.

  The changeover switches 91 to 94 connect the microphone 81a of the first handset 81 and the first A / D converter 101, connect the speaker 81b and the first D / A converter 102, and The state in which the speaker 82b of the handset 82 and the second D / A converter 105 are connected (the state in FIG. 5), and the microphone 82a of the second handset 82 and the second A / D converter 104 are connected. In addition, the speaker 82b and the second D / A converter 105 are connected and the speaker 81b of the first handset 81 and the first D / A converter 102 are connected, and the microphone of the first handset 81 81a is connected to the speaker 82b of the second handset 82 and the speaker 81b of the first handset 81 is connected to the microphone 82a of the second handset 82 (as shown in FIG. 6). ) Switch between.

An example of the operation performed in the mobile station apparatus of this example is shown.
When wireless communication is performed by the first handset 81, the changeover switches 91 to 94 of the changeover box 83 are set so that the route shown in FIG. 5 is obtained, and the microphone 81a of the first handset 81 and the first A / D converter 101 is connected, speaker 81b of first handset 81 and first D / A converter 102 are connected, speaker 82b of second handset 82 and D / A converter 105 are connected. Connected.
In this case, an analog audio signal input to the microphone 81a of the first handset 81 is input to the digital radio equipment 84 via the switching box 83, and the first A / D conversion unit 101, the first audio codec Wirelessly transmitted from the antenna 109 via the unit 103, the digital signal processing unit 107, and the transmission / reception unit 108.

In addition, a signal (reception signal) received by the transmission / reception unit 108 via the antenna 109 is transmitted through the digital signal processing unit 107, the first audio codec unit 103, and the first D / A conversion unit 102. Is output from the speaker 81 b of the handset 81 of the second handset, and the sound is output from the speaker 82 b of the second handset 82 via the digital signal processing unit 107, the second audio codec unit 106, and the second D / A conversion unit 105. Is output.
Thus, in this example, the voice included in the received signal is output from both the first handset 81 and the second handset 82 and can be heard by both users.

Note that the case where wireless communication is performed using the second handset 82 is the same as the case where wireless communication is performed using the first handset 81.
Here, in this example, each handset 81, 82 is provided with a press switch used for, for example, press talk communication. When the user presses the press switch, information indicating the fact (press switch) Information) is notified to the switching box 83 or the processing unit that controls the switching box 83, and the selector switch is activated so that the microphone of one handset whose press switch is pressed is connected to the A / D conversion unit of the digital radio equipment 84. 91 and 93 are switched. That is, in this example, wireless transmission can be performed by the user who presses the press switch of the two handsets 81 and 82.

When communication communication within the same vehicle is performed from the first handset 81 installed at the front of the vehicle to the second handset 82 installed at the rear of the vehicle, for example, it is installed at the front of the vehicle. When the changeover switches 91 to 94 of the changeover box 83 are manually operated by a person, the changeover switches 91 to 94 of the changeover box 83 are set so that the route shown in FIG. 6 is obtained, and the microphone of the first handset 81 is set. 81 a and the speaker 82 b of the second handset 82 are connected, and the speaker 81 b of the first handset 81 and the microphone 82 a of the second handset 82 are connected.
In this case, an analog audio signal input to the microphone 81 a of the first handset 81 is output from the speaker 82 b of the second handset 82 via the switching box 83, and also to the microphone 82 a of the second handset 82. An input audio analog signal is output from the speaker 81 b of the first handset 81 via the switching box 83. As a result, two-way communication is performed between the person at the front of the vehicle and the person at the rear of the vehicle.
Similarly, when a user of the second handset 82 installed at the rear of the vehicle performs a predetermined operation, the user can communicate with the first handset 81 installed at the front of the vehicle. Is possible.

  As described above, in the mobile station apparatus of this example, the first handset 81 wirelessly communicates with an external base station apparatus and the like, and the second handset 82 outputs audio from the outside, A state in which wireless communication is performed with an external base station apparatus or the like by the second handset 82 and audio from the outside is output by the first handset 81, and the first handset 81 installed in the front portion of the vehicle and the vehicle It is possible to switch between a state in which communication is communicated within the same vehicle with the second handset 82 installed at the rear portion, and work in a fire engine or an ambulance can be made more efficient. Further, in this example, communication communication from the handset 81 installed at the front of the vehicle can be started, and communication communication from the handset 82 installed at the rear of the vehicle can be started.

In this example, a vehicle such as a fire engine or an ambulance is used as the moving body, and the moving body is provided with a mobile station device (communication device). The mobile station device can be attached to and detached from the radio equipment body. It is comprised from the portable radio | wireless machine (in this example, illustration is abbreviate | omitted about the portable radio | wireless machine which has a portable wireless communication means).
In the mobile station apparatus of this example, the first handset 81 and the second handset 82 constitute a plurality (two in this example) of communication terminals, and switch between the wireless communication state and the internal communication state. Switching means is configured by the functions of the changeover switches 91 to 94 of the switching box 83, and wireless communication means is configured by the functions of the processing units 101 to 109 provided in the digital wireless equipment 84. The internal communication means is configured by the function of performing internal communication between the communication terminals. Further, the request means is configured by a function of issuing a request for internal communication from the handsets 81 and 82.

A third embodiment of the present invention will be described.
In the mobile station apparatus shown in the first embodiment or the second embodiment, it is necessary to install switching boxes 53 and 83 for switching in-vehicle communication in addition to the digital wireless equipment 54 and 84 for wireless communication. Therefore, when installing in a vehicle which is a narrow space, a configuration without the switching box is preferable.

7 and 8 show configuration examples of the mobile station apparatus of this example.
The mobile station apparatus of this example includes a first handset 111 for calling, a second handset 112 for calling, and digital radio equipment 113, and is installed in the same vehicle.
In this example, the first handset 111 and the digital radio equipment 113 are installed at the front of the vehicle, and the second handset 112 is installed at the rear of the vehicle.

The first handset 111 has a microphone 111a and a speaker 111b.
The second handset 112 has a microphone 112a and a speaker 112b.
In this example, the two handsets 111 and 112 have the same function.
The digital radio equipment 113 includes a first A / D converter 121, a first D / A converter 122, a second A / D converter 123, a second D / A converter 124, It has a switch control unit 125, a first audio codec unit 126, a second audio codec unit 127, a digital signal processing unit 128, a transmission / reception unit 129, an antenna 130, and a CPU (Central Processing Unit) 131. ing.
The switch control unit 125 includes changeover switches 141 to 144 for changeover control.
Here, the switch control unit 125 is configured using a control circuit such as an FPGA (Field Programmable Gate Array), for example.

  The changeover switches 141 to 144 connect the first A / D conversion unit 121, the first D / A conversion unit 122, and the first audio codec unit 126 and the second D / A conversion unit 124 and the first D / A conversion unit 124. The second audio codec unit 127 is connected (the state shown in FIG. 7), and the second A / D conversion unit 123 and the second D / A conversion unit 124 are connected to the second audio codec unit 127. In addition, the first D / A converter 122 and the first audio codec 126 are connected, the first A / D converter 121 and the second D / A converter 124 are connected, and the first The state in which the first D / A converter 122 and the second A / D converter 123 are connected (the state in FIG. 8) is switched.

  Here, the switching process of the changeover switches 141 to 144 performed in the switch control unit 125 is controlled by the CPU 131. Further, such a switching process may be controlled by the CPU 131 in response to the CPU 131 being notified that a predetermined button or the like provided on the handset 111, 112 or the like has been operated by a person, or The CPU 131 may control the received signal from the digital signal processing unit 128 provided in the digital wireless facility 113.

An example of the operation performed in the mobile station apparatus of this example is shown.
When wireless communication is performed by the first handset 111, the switches 131 to 144 of the switch control unit 125 are set by the CPU 131 so as to follow the route shown in FIG. 7, and the first A / D conversion unit 121 and The first audio codec unit 126 is connected, the first D / A conversion unit 122 and the first audio codec unit 126 are connected, the second D / A conversion unit 124 and the second audio codec unit 127 is connected.
A person (user) existing in the front of the vehicle uses the first handset 111 to input sound into the microphone 111a and listen to sound output from the speaker 111b.
A person (user) existing at the rear of the vehicle uses the second handset 112 to listen to the sound output from the speaker 112b.

In this case, the audio analog signal input to the microphone 111a of the first handset 111 is input to the digital radio equipment 113, converted into a digital signal by the first A / D converter 121, and the switch controller 125 is Then, the audio is encoded by the first audio codec unit 126, modulated by the digital signal processing unit 128, and wirelessly transmitted from the antenna 130 by the transmission / reception unit 129.
Further, a signal (received signal) received by the transmission / reception unit 129 via the antenna 130 is demodulated by the digital signal processing unit 128 and decoded by the first audio codec unit 126, and the switch control unit 125 is changed. Then, it is converted into an analog signal by the first D / A converter 122 and input to the speaker 111b of the first handset 111, and is decoded by the second audio codec unit 127, and the switch controller 125. 2 is converted into an analog signal by the second D / A converter 124 and input to the speaker 112b of the second handset 112. As a result, the sound included in the received signal is output from the speaker 111 b of the first handset 111 and also output from the speaker 112 b of the second handset 112. As described above, in this example, the voice included in the received signal is output from both the first handset 111 and the second handset 112 and can be heard by both users.

Note that the case where wireless communication is performed using the second handset 112 is the same as the case where wireless communication is performed using the first handset 111.
Here, in this example, each handset 111, 112 is provided with a press switch used for, for example, press talk communication. When the user presses the press switch, information indicating the fact (press switch) Information) is notified to the CPU 131, and the changeover switches 141 and 143 are switched so that the A / D conversion unit connected to the microphone of one handset whose press switch is pressed is connected to the audio codec unit and becomes effective. That is, in this example, wireless transmission can be performed by the user who presses the press switch of the two handsets 111 and 112.

  When communicating in the same vehicle from the first handset 111 installed at the front of the vehicle to the second handset 112 installed at the rear of the vehicle, for example, the first handset 111 is used. By operating by a person, a request to start communication is transmitted to the CPU 131, and the switch control unit 125 is controlled by the CPU 131 according to this request so that the route shown in FIG. As a result, the first A / D converter 121 connected to the microphone 111a of the first handset 111 and the second D / A converter 124 connected to the speaker 112b of the second handset 112 are connected. In addition, the first D / A converter 122 connected to the speaker 111b of the first handset 111 and the second A / D converter 123 connected to the microphone 112a of the second handset 112 are connected. The

A person (user) existing in the front of the vehicle uses the first handset 111 to input sound into the microphone 111a and listen to sound output from the speaker 111b.
Similarly, a person (user) existing at the rear of the vehicle uses the second handset 112 to input sound into the microphone 112a and listen to sound output from the speaker 112b.
In this case, the audio analog signal input to the microphone 111 a of the first handset 111 is converted into a digital signal by the first A / D converter 121, and the second D is transmitted via the switch controller 125. The signal is converted into an analog signal by the / A converter 124 and output from the speaker 112b of the second handset 112. In addition, an analog audio signal input to the microphone 112 a of the second handset 112 is converted into a digital signal by the second A / D conversion unit 123, and the first D / D is transmitted via the switch control unit 125. The signal is converted into an analog signal by the A converter 122 and output from the speaker 111 b of the first handset 111. As a result, two-way communication is performed between the person at the front of the vehicle and the person at the rear of the vehicle.
Similarly, when the user of the second handset 112 installed at the rear of the vehicle performs a predetermined operation, the user can communicate with the first handset 111 installed at the front of the vehicle. Is possible.

  Further, when a signal from a base station device or the like is wirelessly received by the digital wireless equipment 113 while the handsets 111 and 112 are in communication with each other, as an example, the communication between the handsets is left as it is. More than one (or all) handsets can be controlled to output sound, vibration, light, etc., to notify the user. As another example, the changeover switches 141 to 144 of the switch control unit 125 are forced. In particular, it is possible to switch to a route for performing wireless communication such as the route shown in FIG. 7 and the like, and control to enable wireless communication by disconnecting communication between handsets. In this example, such control is performed by the CPU 131 in response to notification from the digital signal processing unit 128 that a radio signal from a base station apparatus or the like has been received.

Thus, in the mobile station apparatus of this example, at least two handsets 111 and 112 having microphones 111a and 112a and speakers 111b and 112b are connected to A / D converters 121 and 123 and D / A converters 122 and 124, respectively. And a switch control unit 125 for controlling the output side paths of the A / D conversion units 121 and 123 and the input side paths of the D / A conversion units 122 and 124, and a changeover switch of the switch control unit 125 The communication between the plurality of handsets 111 and 112 is made possible by controlling the CPUs 141 to 144 by the CPU 131.
In this example, in a configuration in which a plurality of handsets 111 and 112 are connected to the same digital wireless equipment 113, the handset is changed from the wireless communication state in response to the activation of inter-handset communication from any of the handsets 111 and 112. By switching the path to the inter-connection state, communication between handsets can be performed between the plurality of handsets 111 and 112. In this example, inter-handset communication can be activated from any of the handsets 111 and 112, and in-vehicle communication can be started from the front or rear of the vehicle.

  As described above, in the mobile station device of this example, the first handset 111 wirelessly communicates with an external base station device and the like, and the second handset 112 outputs audio from the outside, A state in which wireless communication is performed between the second handset 112 and an external base station apparatus and the like, and sound from the outside is output by the first handset 111, and the first handset 111 installed in the front portion of the vehicle and the vehicle It is possible to switch between a state in which communication is communicated within the same vehicle with the second handset 112 installed at the rear, and work in a fire engine or an ambulance can be made more efficient. Further, in this example, communication communication from the handset 111 installed at the front part of the vehicle can be started, and communication communication from the handset 112 installed at the rear part of the vehicle can be started.

  Further, in the mobile station apparatus of this example, when the digital wireless facility 113 in which a plurality of handsets 111 and 112 for wireless communication are installed is switched between the wireless communication state and the in-vehicle communication state, the digital by the CPU 131 is used. Since the processing is used, for example, processing is easier than in the case where analog processing is used, and the functions of the changeover switches 141 to 144 are incorporated in the digital wireless equipment 113. The switching boxes 53 and 83 as shown in the embodiment and the second embodiment can be eliminated, the apparatus can be downsized, and the space in the vehicle can be used effectively.

In this example, a vehicle such as a fire engine or an ambulance is used as the moving body, and the moving body is provided with a mobile station device (communication device). The mobile station device can be attached to and detached from the radio equipment body. It is comprised from the portable radio | wireless machine (in this example, illustration is abbreviate | omitted about the portable radio | wireless machine which has a portable wireless communication means).
In the mobile station apparatus of this example, a plurality of (two in this example) communication terminals are configured by the first handset 111 and the second handset 112, and switch between the wireless communication state and the internal communication state. The switching means is configured by the functions of the changeover switches 141 to 144 of the switch control unit 125 and the CPU 131, and the wireless communication means is configured by the functions of the processing units 121 to 131 provided in the digital wireless equipment 113. Internal communication means is configured by the function of performing internal communication between communication terminals via the / D conversion units 121 and 123, the D / A conversion units 122 and 124, and the switch control unit 125. Further, the request means is configured by a function of issuing a request for internal communication from the handsets 111 and 112.

A fourth embodiment of the present invention will be described.
In this example, the description of the same configuration and operation as in the third example is omitted or simplified.
9 and 10 show a configuration example of the mobile station apparatus of this example.
The mobile station apparatus of this example includes a first handset 151 for a call, a second handset 152 for a call, and digital radio equipment 153, and is installed in the same vehicle.
In this example, a first handset 151 and a digital radio equipment 153 are installed at the front of the vehicle, and a second handset 152 is installed at the rear of the vehicle.

The first handset 151 includes a microphone 151a and a speaker 151b.
The second handset 152 has a microphone 152a and a speaker 152b.
In this example, the two handsets 151 and 152 have the same function.
The digital radio equipment 153 includes a first A / D converter 161, a first D / A converter 162, a first audio codec unit 163, a second A / D converter 164, a second D / A conversion unit 165, second audio codec unit 166, switch control unit 167, digital signal processing unit 168, transmission / reception unit 169, antenna 170, and CPU 171.
The switch control unit 167 includes changeover switches 181 to 184 for changeover control.

The changeover switches 181 to 184 connect the output side and input side of the first audio codec unit 163 on the digital signal processing unit 168 side with the digital signal processing unit 168 and the second side on the digital signal processing unit 168 side. The state in which the input side of the audio codec unit 166 and the digital signal processing unit 168 are connected (the state of FIG. 9), and the output side and input side of the second audio codec unit 166 on the digital signal processing unit 168 side and the digital signal A state where the processing unit 168 is connected and the input side of the first audio codec unit 163 on the digital signal processing unit 168 side and the digital signal processing unit 168 are connected, and a first side on the digital signal processing unit 168 side The input of the second audio codec unit 166 on the output side of the audio codec unit 163 and the digital signal processing unit 168 side And the input side of the first audio codec unit 163 on the digital signal processing unit 168 side and the output side of the second audio codec unit 166 on the digital signal processing unit 168 side (see FIG. 10 states).
Here, the switching process of the changeover switches 181 to 184 performed in the switch control unit 167 is controlled by the CPU 171.

An example of the operation performed in the mobile station apparatus of this example is shown.
When wireless communication is performed using the first handset 151, the CPU 171 sets the switches 181 to 184 of the switch control unit 167 so that the route shown in FIG. 9 is established, and the first signal on the digital signal processing unit 168 side is set. The input side and output side of the audio codec unit 163 and the digital signal processing unit 168 are connected, and the input side of the second audio codec unit 166 on the digital signal processing unit 168 side and the digital signal processing unit 168 are connected. The

In this case, an analog audio signal input to the microphone 151a of the first handset 151 is input to the digital radio equipment 153, and the first A / D converter 161, the first audio codec 163, and the switch controller It is wirelessly transmitted from the antenna 170 via 167, the digital signal processing unit 168, and the transmission / reception unit 169.
In addition, a signal (received signal) received by the transmission / reception unit 169 via the antenna 170 passes through the digital signal processing unit 168 and the switch control unit 167, and the first audio codec unit 163 and the first D Is input to the speaker 151b of the first handset 151 via the / A converter 162 and the second handset 152 via the second audio codec 166 and the second D / A converter 165. Input to the speaker 152b. As a result, the audio included in the received signal is output from the speaker 151 b of the first handset 151 and also output from the speaker 152 b of the second handset 152.
Note that the case where wireless communication is performed using the second handset 152 is the same as the case where wireless communication is performed using the first handset 151.
In this example, the switches 181 to 184 are switched by the CPU 171 so that the user who presses the press switch of the two handsets 151 and 152 can perform wireless transmission.

  When communicating in the same vehicle from the first handset 151 installed at the front of the vehicle to the second handset 152 installed at the rear of the vehicle, for example, the first handset 151 is used. By operating by a person, a request to start communication is transmitted to the CPU 171, and the switch control unit 167 is controlled by the CPU 171 in accordance with this request so that the route shown in FIG. 10 is obtained. As a result, the output side of the first audio codec unit 163 corresponding to the microphone 151a of the first handset 151 and the input side of the second audio codec unit 166 corresponding to the speaker 152b of the second handset 152 are connected. In addition, the input side of the first audio codec unit 163 corresponding to the speaker 151b of the first handset 151 and the output side of the second audio codec unit 166 corresponding to the microphone 152a of the second handset 152 are connected. The

In this case, the audio analog signal input to the microphone 151a of the first handset 151 is converted into a digital signal by the first A / D conversion unit 161, and is encoded by the first audio codec unit 163. The signal is decoded by the second audio codec unit 166 via the switch control unit 167, converted into an analog signal by the second D / A conversion unit 165, and output from the speaker 152 b of the second handset 152. In addition, an analog audio signal input to the microphone 152a of the second handset 152 is converted into a digital signal by the second A / D conversion unit 164, is encoded by the second audio codec unit 166, and is switched. Via the control unit 167, the first audio codec unit 163 performs decoding processing, the first D / A conversion unit 162 converts it into an analog signal, and outputs the analog signal from the speaker 151 b of the first handset 151. As a result, two-way communication is performed between the person at the front of the vehicle and the person at the rear of the vehicle.
Similarly, when the user of the second handset 152 installed at the rear of the vehicle performs a predetermined operation, the user can communicate with the first handset 151 installed at the front of the vehicle. Is possible.

  Thus, in the mobile station apparatus of this example, at least two handsets 151 and 152 having microphones 151a and 152a and speakers 151b and 152b are A / D converters 161 and 164 and D / A converters 162 and 165. Is connected to the audio codec units 163 and 166, and is provided with a switch control unit 167 for controlling the input / output paths of the audio codec units 163 and 166 on the digital signal processing unit 168 side. The switches 181 to 184 are controlled by the CPU 171 to enable communication between the plurality of handsets 151 and 152.

  As described above, in the mobile station apparatus of this example, the first handset 151 performs wireless communication with an external base station apparatus and the like, and the second handset 152 outputs audio from the outside, Wireless communication with an external base station apparatus or the like by the second handset 152 and output of sound from the outside by the first handset 151, the first handset 151 installed in the front part of the vehicle, and the vehicle It is possible to switch between the state in which communication is communicated within the same vehicle with the second handset 152 installed at the rear, and the work in a fire engine or an ambulance can be made more efficient. Further, in this example, it is possible to start communication from the handset 151 installed at the front part of the vehicle and to start communication from the handset 152 installed at the rear part of the vehicle.

  In the mobile station apparatus of this example, the digital radio equipment 153 provided with a plurality of radio communication handsets 151 and 152 performs digital switching by the CPU 171 when switching between the radio communication state and the communication communication state in the vehicle. Since the processing is used, for example, the processing is easier than when analog processing is used, and the functions of the changeover switches 181 to 184 are incorporated in the digital wireless equipment 153. The switching boxes 53 and 83 as shown in the embodiment and the second embodiment can be eliminated, the apparatus can be downsized, and the space in the vehicle can be used effectively.

In this example, a vehicle such as a fire truck or an ambulance is used as the mobile body, and the mobile body is provided with a mobile station device (communication device). The mobile station device can be attached to and detached from the radio equipment body. It is comprised from the portable radio | wireless machine (in this example, illustration is abbreviate | omitted about the portable radio | wireless machine which has a portable wireless communication means).
Further, in the mobile station apparatus of this example, a plurality of (two in this example) communication terminals are configured by the first handset 151 and the second handset 152, and the wireless communication state and the internal communication state are switched. The switching means is configured by the functions of the selector switches 181 to 184 and the CPU 171 of the switch control unit 167, and the wireless communication means is configured by the functions of the processing units 161 to 171 provided in the digital wireless equipment 153. Internal communication means is configured by the function of performing internal communication between communication terminals via the / D conversion units 161 and 164, the D / A conversion units 162 and 165, the audio codec units 163 and 166, and the switch control unit 167. . Further, the requesting means is constituted by the function of issuing a request for internal communication from the handsets 151 and 152.

Here, in the third embodiment, the changeover switches 141 to 144 (switch control units) are provided between the A / D conversion units 121 and 123 and the D / A conversion units 122 and 124 and the audio codec units 126 and 127 in the digital radio equipment 113. 125), in the fourth embodiment, the changeover switches 181 to 184 (switch control unit 167) are provided between the audio codec units 163 and 166 and the digital signal processing unit 168 in the digital radio equipment 153. An example configuration is shown.
As another configuration example, it is possible to provide a function of a changeover switch on the handset side of the A / D conversion unit and the D / A conversion unit in the digital radio equipment. In this configuration, the handset, the A / D conversion unit, and the D / A conversion unit are connected via the change-over switch, and communication is performed between the plurality of handsets via the change-over switch during communication between the handsets. .
Moreover, although the case where the mobile station apparatus was mounted in the vehicle of an automobile was shown in the above embodiment, it is also possible to mount the mobile station apparatus on various mobile bodies such as trains and ships.

Here, the configuration of the system and apparatus according to the present invention is not necessarily limited to the configuration described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various devices and systems.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various processes performed in the system and apparatus according to the present invention, for example, the processor executes a control program stored in a ROM (Read Only Memory) in hardware resources including a processor and a memory. A controlled configuration may be used, and for example, each functional unit for executing the processing may be configured as an independent hardware circuit.
The present invention can also be understood as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, and the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

It is a figure which shows the structural example of a firefighting digital radio system. It is a figure which shows the structural example of a vehicle equipment and a portable device. It is a figure which shows the structural example of the mobile station apparatus which concerns on 1st Example of this invention. It is a figure which shows the structural example of the mobile station apparatus which concerns on 1st Example of this invention. It is a figure which shows the structural example of the mobile station apparatus which concerns on 2nd Example of this invention. It is a figure which shows the structural example of the mobile station apparatus which concerns on 2nd Example of this invention. It is a figure which shows the structural example of the mobile station apparatus which concerns on 3rd Example of this invention. It is a figure which shows the structural example of the mobile station apparatus which concerns on 3rd Example of this invention. It is a figure which shows the structural example of the mobile station apparatus which concerns on 4th Example of this invention. It is a figure which shows the structural example of the mobile station apparatus which concerns on 4th Example of this invention.

Explanation of symbols

1 .... Command device 2 .... Line control device 11 .... Operating unit 12, 34, 44 ... Display unit 13 .... Storage unit 21 ... Vehicle-mounted device 22 .... Portable device 23 ... Station, A1-An ... Base station device, B1-Bn ... Remote controller, C1-Cm ... Mobile station device, 31, 41 ... Antenna, 32, 42 ... Radio unit, 33, 43 ... Key Operation unit 35, 45 .. Microphone unit, 36, 46 .. Speaker unit, 37, 47 .. Memory, 38 .. Mobile interface, 39, 49 .. Control unit, 48.
51, 81, 82, 111, 112, 151, 152 ... Handset, 51a, 81a, 82a, 111a, 112a, 151a, 152a ... Mike, 51b, 52, 81b, 82b, 111b, 112b, 151b, 152b・ Speaker, 53, 83 ..Switching box, 54,84 ..Digital wireless equipment, 61, 91-94, 141-144, 181-184 ..Switch, 71, 101, 104, 121, 123, 161, 164... A / D converter, 72, 102, 105, 122, 124, 162, 165 .. D / A converter, 73, 103, 106, 126, 127, 163, 166 .. Audio codec section, 74 107, 128, 168 .. Digital signal processing unit, 75, 108, 129, 169 .. Transmission and reception unit, 7 , 109,130,170 ... antenna, 125,167 ... switch control unit, 131,171 ·· CPU,

Claims (5)

In a wireless communication system having a mobile unit,
The mobile body includes a plurality of communication terminals,
Wireless communication means for executing wireless communication processing between one or more of the plurality of communication terminals and an external device;
Internal communication means for executing communication processing between two or more of the plurality of communication terminals;
A switching unit that switches between a state in which wireless communication by the wireless communication unit is performed and a state in which communication by the internal communication unit is performed,
A wireless communication system. The wireless communication system according to claim 1, wherein
In the mobile body,
The plurality of communication terminals include a first communication terminal and a second communication terminal provided at positions separated from each other in the mobile body,
The first communication terminal has first request means for requesting communication with the second communication terminal,
The second communication terminal has second request means for requesting communication with the first communication terminal,
In response to a request from the first communication terminal or a request from the second communication terminal, the switching unit switches to a state in which communication by the internal communication unit is performed, and the internal communication unit performs the first communication. Executing communication processing between the terminal and the second communication terminal;
A wireless communication system. The wireless communication system according to claim 1 or 2,
In the mobile body,
The switching means is composed of a circuit for processing a digital signal, and executes the switching by digital processing.
A wireless communication system. The wireless communication system according to any one of claims 1 to 3,
The mobile body includes a radio equipment body installed on the mobile body, and a portable radio that is detachable from the radio equipment body,
The portable wireless device has portable wireless communication means for executing wireless communication processing with the external device,
In the wireless equipment body and the portable wireless device, the same information is set as calling information from the external device,
A wireless communication system. In a communication method in which communication is performed by a communication device provided in a mobile body,
A state in which wireless communication processing is performed between one or more communication terminals of a plurality of communication terminals included in the communication apparatus and an external device; and two or more communication terminals of the plurality of communication terminals To switch the state of executing communication processing between, and execute the communication processing of the switched state,
A communication method characterized by the above.

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