JP4877952B2 - Voice communication system, wireless terminal and relay device using wireless LAN - Google Patents

Description

  The present invention relates to a voice call system using a wireless LAN, and more particularly to a technique for making an emergency call from a wireless terminal.

In recent years, in an Internet connection service using a public wireless LAN (hereinafter referred to as “connection service”), installation of a relay device generally referred to as an access point has progressed, and the Internet can be accessed from a wireless terminal via a relay device. Can be connected to.
Here, in order to connect the wireless terminal to the Internet, first, the wireless terminal needs to connect to the relay device. This relay apparatus is normally installed by a communication provider that provides a connection service, and only the connection service subscriber is allowed to connect.

  Generally, when a user subscribes to a connection service, an SSID (Service Set Identifier), an encryption key, and user identification information, which is a wireless LAN network identification name defined by IEEE 802.11b, which is a wireless LAN standard , A password, etc. are given by the carrier. After setting the SSID and encryption key in the wireless terminal, try to connect to the relay device, and enter user identification information and password in response to a request from the relay device to confirm whether you are a subscriber to the connection service If the user is a connection service subscriber, the connection to the relay device is permitted, and the connection to the Internet becomes possible.

Therefore, even if a relay device installed by another communication carrier exists in the vicinity, the user cannot connect to the Internet from the wireless terminal, and in order to connect to the Internet, the relay device of the subscribed connection service It is necessary to move the wireless terminal to near (hereinafter referred to as “subscription relay device”).
Regarding mobile phones that can be connected to the Internet via the mobile phone network when away from home or via the Bluetooth network at home, the gateway device of the Bluetooth network in the home is a terminal that is not permitted to connect in advance such as a visitor's mobile phone. In addition, there is known a method of permitting connection after performing processing such as predetermined charging and log acquisition (see Patent Document 1).
JP 2002-111870 A

  The fact that a user has to move to a wireless terminal near a joining relay device and connect to the Internet is often accompanied by time and place restrictions. May be a problem. For example, communication with high urgency includes communication with the police, fire fighting, first aid, and the like. In situations where contact is made with the police, firefighting, first aid, etc., there is often a danger to human life and body, so prompt contact is required, and the user has a wireless terminal near the joining relay device. May not be moved.

In addition, contact with the police, fire and ambulance, etc. can be made by telephone as well as by voice, as well as by email. However, since the police, fire department, and emergency departments need to quickly grasp the situation of the contact person and give appropriate instructions, it is considered more appropriate to use voice communication with excellent real-time characteristics. .
Therefore, the present invention has been made in view of such a problem, and is a voice call system including a wireless terminal and a relay device connected by a wireless LAN, and a voice that minimizes movement of the wireless terminal by a user. It aims at providing the system which enables emergency contact by.

  In order to solve the above problem, a voice call system according to the present invention is a voice call system including a wireless terminal and a relay device connected by a wireless LAN, and the wireless terminal includes an input unit that receives an input from a user; When the input received by the input means is a predetermined emergency call request, an emergency call request means for transmitting the emergency call request to the relay apparatus, and a connection request for detecting a connection request transmitted from the relay apparatus A detecting unit; a response unit that transmits a predetermined response for permitting connection to the relay device when the connection request detected by the connection request detecting unit is a predetermined connection request; and Voice data transmission means for transmitting voice data to the relay device that has transmitted a response permitting connection, and the relay device is transmitted from the wireless terminal When the emergency call request detected by the emergency call request detection means is a predetermined emergency call request, the predetermined connection request is sent to the wireless terminal. Connection request means for transmitting, and voice data relay means for transmitting the voice data received from the wireless terminal to a predetermined destination after receiving a predetermined response permitting the connection from the wireless terminal. It is a characteristic.

  In the voice call system according to the present invention having the above-described configuration, when the relay device detects a predetermined emergency call request transmitted from the wireless terminal, the relay device transmits a predetermined connection request, and the wireless terminal is transmitted from the relay device. When a predetermined connection request is detected, a predetermined response for permitting connection is transmitted, and when the relay device detects a predetermined response for permitting connection transmitted from the wireless terminal, a connection is established between the relay device and the wireless terminal. Therefore, even a wireless terminal of a user who has not subscribed to a connection service in advance can be connected to the relay device. In other words, when the predetermined destination is the police, fire fighting, etc., the relay device joins the wireless terminal to relay the voice data received from the wireless terminal and transmit it to the emergency destination such as the police, fire fighting, emergency etc. It is possible to make a call between the wireless terminal and the police, fire fighting / emergency, etc. without moving to the vicinity of the relay device.

Even when multiple relay devices receive an emergency call request from a wireless terminal, only the relay device that receives a response permitting connection transfers voice data from the wireless terminal to the emergency call destination. The occurrence of inadvertent communication concentration on the destination device is prevented.
Here, the voice data relay means may transmit voice data using VoIP (Voice over Internet Protocol).

  In addition, the relay device authenticates whether or not the wireless terminal can be connected, and includes an authentication unit that transmits a predetermined connection rejection response when the wireless terminal is not permitted to be connected. The communication method to be received and the communication method not to be authenticated can be selected, the communication method to be authenticated is selected, and communication with the relay apparatus is attempted. When the input is a predetermined emergency call request, the communication method to be authenticated is selected, the connection to the relay device is attempted, and no authentication is received when the connection rejection response is received from the relay device The communication method may be selected and the predetermined emergency call request may be transmitted.

  Authentication means that the relay device determines whether or not the wireless terminal is a wireless terminal of a connection service subscriber by comparing it with information registered in advance. When transmitting an emergency call request, the wireless terminal first tries to connect to the relay apparatus by a communication method for receiving authentication, that is, for example, transmits user identification information, a password, and the like to attempt connection. If the user identification information, password, etc. do not match those registered, the wireless terminal reconnects to the relay device and makes an emergency call request using a communication method that does not receive authentication. It is possible to determine whether the performed wireless terminal is the subscriber's wireless terminal.

In addition, when the relay device receives the voice data from the wireless terminal, the relay device indicates that the predetermined emergency call request has been made to all the wireless terminals that are within the reach of the radio wave of the relay device. It is good also as providing the broadcast transmission means to transmit.
Thereby, the user of the wireless terminal that exists near the wireless terminal that transmitted the emergency call request can know the presence of an accident or the like that occurred in the vicinity by notification that there was an emergency call request, Participation in rescue operations and securing of own safety are possible.

Further, the voice data relay means further transmits voice data received from the predetermined destination to the wireless terminal, and the wireless terminal further receives the voice data transmitted from the relay device. And receiving means for outputting the sound data received by the receiving means as sound.
As a result, the relay device can receive voice data from the emergency contact and transmit it to the wireless terminal, so that the wireless terminal receives the voice data from the emergency destination, and the user receives the voice data from a speaker or the like. It becomes possible to listen.

Further, the input means accepts information designating a destination as the input, and the wireless terminal transmits destination designating information inputted by the input means to the relay device. The relay device includes: a destination receiving unit that receives information specifying the destination transmitted by the wireless terminal; and a destination specifying unit that specifies a destination based on the information specifying the destination received by the destination receiving unit. And voice data may be transmitted using the destination specified by the destination specifying means as the predetermined destination.
As a result, information indicating the destination designated by the user can be sent to the relay device from a plurality of emergency destinations such as police, fire fighting / emergency, etc., and the relay device can identify the telephone number from the information indicating the destination. Since the voice data received from the wireless terminal is transmitted to the specified destination, the user can make a call with the emergency destination designated by the user.

In addition, the wireless terminal includes identification information transmitting means for transmitting information for identifying the wireless terminal to the relay device, and the relay device receives information for identifying the wireless terminal received from the wireless terminal. May be provided with identification information relay means for transmitting to the predetermined destination after receiving a predetermined response permitting the connection from the wireless terminal.
As a result, even if communication is cut off during transmission / reception of voice data, if the telephone number of the wireless terminal is received as the identification information of the wireless terminal, the telephone from the emergency destination tries to make a call to the wireless terminal Can do. In addition, since the identification information is sent, there is a possibility that the wireless terminal or the user who made the emergency call can be specified, and the emergency call request for mischief can be suppressed.

In addition, when the wireless terminal does not detect the predetermined connection request transmitted from the relay device within a predetermined period after transmitting the predetermined emergency call request, the wireless terminal It is good also as outputting that so that the user of a terminal can recognize.
As a result, if the wireless terminal cannot detect the connection request from the relay device due to reasons such as the absence of the relay device in the range where the emergency call request transmitted from the wireless terminal arrives, it indicates that the connection request could not be detected. Output. Therefore, the user can take measures such as moving the place and requesting an emergency call again after a while, and can prevent wasteful consumption of the battery of the wireless terminal.

When there are a plurality of relay devices, the response unit of the wireless terminal transmits a response permitting the connection only to the relay device that is the transmission source of the predetermined connection request detected first. It is good as well.
As a result, even when the wireless terminal receives a plurality of connection requests, a response permitting connection is transmitted only to the relay device that transmitted the connection request received first, so that the connection is established with only one relay device. Is possible.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
<Embodiment 1>
<System configuration>
Hereinafter, the configuration of the voice call system according to the first embodiment will be described.
FIG. 1 is a configuration diagram of a voice call system according to the first embodiment.

The voice call system according to the first embodiment includes a wireless terminal 100, relay devices 300 and 400, an emergency call destination device 500, and an IP network 600, as shown in FIG.
The wireless terminal 100 is a mobile phone having a wireless LAN connection function, and is used by a user who makes an emergency call. As will be described in detail later, when one of the emergency call buttons provided on the operation unit 101 of the wireless terminal 100 is pressed by the user, the connection with the relay device 300 or 400 is established, and the voice data is connected. Can be transmitted to the emergency contact device 500 via the relay device 300 or 400.

  The relay apparatuses 300 and 400 are installed in a utility pole, a hotel, a restaurant, and the like by a communication provider that provides a connection service, and are generally called access points. In the operation phase of the system, a plurality of relay devices may be installed in close proximity. The relay devices 300 and 400 are one of such relay devices and have the same configuration. In the following description regarding the relay device, the relay device 300 will be described as an example.

As will be described in detail later, the relay device 300 establishes a connection with the wireless terminal 100, establishes a connection with the emergency destination device 500 using VoIP, and establishes a connection between the wireless terminal 100 and the emergency destination device 500. It relays audio data sent and received via.
The VoIP technology is a technology in which a digitally encoded audio signal is divided into packets at certain time intervals and transmitted / received via an IP network. VoIP is composed of a signaling protocol for controlling connection with a communication partner and a voice data transfer protocol. The signaling protocol includes SIP (Session Initiation Protocol), H.264, and so on. 323, MGCP (Media Gateway Control Protocol), etc., and voice data transfer protocols include RTP (Real-time Transport Protocol) and RTCP (RTP Control Protocol). In the first embodiment, SIP is used as a signaling protocol, and RTP is used as a voice data transfer protocol.

The emergency call destination device 500 is a telephone and is installed for each police 501, emergency / fire fighting 502, and the like. The emergency destination device 500 is connected to the relay devices 300 and 400 via the IP network 600 that is the Internet.
<Configuration of Wireless Terminal 100>
Hereinafter, the configuration of the wireless terminal 100 will be described.

  As shown in FIG. 1, the wireless terminal 100 includes an operation unit 101, an identification information storage unit 102, an emergency call request unit 103, a communication unit 104, a connection request detection unit 105, a display unit 106, a response unit 107, a microphone 108, a voice A data transmission unit 109 and a speaker 110 are included. The following functions of the emergency call request unit 103, the connection request detection unit 105, the response unit 107, and the voice data transmission unit 109 are realized by causing a CPU (Central Processing Unit) to execute a program stored in a memory. Is done. In this embodiment, data exchange between programs is expressed as signal exchange.

  The operation unit 101 includes a key group such as a so-called numeric keypad and a button group, and is used when a user performs a predetermined operation. The button group includes an emergency call button and a disconnect button provided for each emergency call destination such as the police 501 and the fire department / emergency 502. When these buttons are pressed by the user, a signal corresponding to each button is generated and transmitted to the emergency call request unit 103. The signal corresponding to the emergency call button includes destination designation information indicating the type of the emergency call destination.

The identification information storage unit 102 is a non-volatile memory that stores mobile phone numbers, IP addresses, and MAC addresses, which are identification information of the wireless terminal 100. The mobile phone number is stored in the identification information storage unit 102 when the communication carrier or the like sets it, the IP address is acquired, and the MAC address is set by the mobile phone manufacturer.
The emergency call request unit 103 has a function of generating and transmitting a signal for making a request corresponding to each button when a signal corresponding to each button is transmitted from the operation unit 101. When a signal corresponding to the emergency call button is transmitted from the operation unit 101, an emergency call request signal is generated from the signal and the identification information of the wireless terminal 100 read from the identification information storage unit 102, Broadcast about once. When a signal corresponding to the disconnect button is transmitted, a disconnect request signal serving as a trigger for disconnecting the line with the relay device 300 is generated and transmitted.

The communication unit 104 is a circuit that operates in an ad hoc mode, performs data transmission / reception with the relay apparatus 300, and performs mutual conversion between an electrical signal and a radio signal for a wireless LAN when transmitting / receiving.
In general, the ad hoc mode is a mode in which devices directly communicate with each other without using an access point. On the other hand, a mode in which communication is performed via an access point is referred to as an infrastructure mode. These are wireless LAN communication modes compliant with the IEEE 802.11b standard.

In the present embodiment, when the communication unit 104 is operating in the ad hoc mode, the relay device 300 determines whether the wireless terminal 100 to be connected is a wireless terminal of a connection service subscriber (hereinafter referred to as “subscriber authentication”). ), The wireless terminal 100 is permitted to connect to the relay device 300.
The connection request detection unit 105 has a function of transmitting a signal instructing a response corresponding to a connection request signal and a disconnection request signal described later received from the relay device 300 to the response unit 107. If the connection request signal cannot be detected within a predetermined time after the emergency call request unit 103 transmits the emergency call request signal, an undetected signal to that effect is transmitted to the display unit 106.

The predetermined time can be set by the user. In the first embodiment, the predetermined time is set to 1 minute after the first emergency call request is transmitted.
The display unit 106 includes a liquid crystal display (LCD) and displays that the connection request signal from the relay device cannot be detected when an undetected signal is transmitted from the connection request detection unit 105.

The response unit 107 has a function of transmitting a response signal for each signal to the relay device 300 according to the signal transmitted from the connection request detection unit 105.
The voice data transmission unit 109 has a function of transmitting voice data input from the microphone 108 to the relay apparatus 300 after the connection between the relay apparatus 300 and the emergency destination apparatus 500 is completed.

Note that the microphone 108 and the speaker 110 are the same as those in the related art, and a description thereof will be omitted.
<Configuration of Relay Device 300>
Next, the configuration of the relay device 300 will be described.
As shown in FIG. 1, the relay device 300 includes a communication unit 301, an emergency call request detection unit 302, a destination identification unit 303, a voice data relay unit 304, and a connection request unit 305. The following functions of the emergency call request detecting unit 302, the destination specifying unit 303, the voice data relay unit 304, and the connection request unit 305 are realized by causing the CPU to execute a program stored in the memory. In this embodiment, data exchange between programs is expressed as signal exchange.

The communication unit 301 is a circuit that operates in an ad hoc mode, transmits and receives data to and from the wireless terminal 100, and performs mutual conversion between an electrical signal and a radio signal for a wireless LAN when transmitting and receiving.
In the present embodiment, when the communication unit 301 operates in the ad hoc mode, the relay device 300 is set not to perform subscriber authentication, and the wireless terminal 100 and the relay device 300 are not subjected to subscriber authentication. Can be connected.

The emergency call request detecting unit 302 receives the emergency call request signal transmitted from the wireless terminal 100, relays the destination designation information included in the emergency call request signal to the destination specifying unit 303, and relays the identification information of the wireless terminal 100 to the voice data relay. The unit 304 has a function of transmitting an emergency call request reception signal indicating that the emergency call request signal has been received to the connection request unit 305.
The destination specifying unit 303 has a non-volatile memory for storing the data shown in FIG. 3 and specifies the telephone number of the emergency destination device 500 based on the destination designation information transmitted from the emergency call request detecting unit 302. The telephone number is transmitted to the voice data relay unit 304.

  The voice data relay unit 304 has a function of connecting and disconnecting a line using the SIP with the emergency destination device 500 using the telephone number of the emergency destination device 500 transmitted from the destination specifying unit 303. In addition, when the line is disconnected from the emergency call destination device 500, the wireless terminal 100 has a function of transmitting a disconnection request signal for disconnecting the line and disconnecting the line with the wireless terminal 100.

Further, it has a buffer for temporarily storing data, and has a function of relaying voice data transmitted and received between the wireless terminal 100 and the emergency destination device 500. Transmission / reception of voice data between the voice data relay unit 304 and the emergency destination device 500 is performed using RTP.
The voice data relay unit 304 has a function of transmitting the mobile phone number, IP address, and MAC address, which are identification information of the wireless terminal 100 transmitted from the emergency call request detection unit 302, to the emergency call destination device 500.

The connection request unit 305 has a function of transmitting a connection request signal for requesting connection permission to the wireless terminal 100 in accordance with the signal transmitted from the emergency call request detection unit 302.
<Data>
Hereinafter, the data used in the voice call system will be described.
FIG. 2 is a diagram illustrating a frame structure of an emergency call request signal generated and transmitted by the emergency call request unit 103 of the wireless terminal 100. The emergency call request signal 700 is a beacon signal, and its frame structure conforms to the IEEE 802.11b standard, which is a wireless LAN standard.

  The emergency call request signal 700 includes a vendor area 701 in which the user can arbitrarily set data in accordance with the IEEE 802.11b standard. The vendor area 701 is further set with destination designation information of the emergency call destination device 500. An area 702, an area 703 in which the mobile phone number of the wireless terminal 100 is set, an area 704 in which an IP address is set, and an area 705 in which a MAC address is set are included.

  The destination designation information set in the area 702 is a bit string indicating the type of the emergency destination 500, and a different bit string is assigned to each emergency destination device 500 such as the police 501 and the fire department / emergency 502. When an emergency call button provided for each of the police unit 501 and the fire department / emergency 502 is pressed on the operation unit 101 of the wireless terminal 100, a bit string corresponding to the pressed emergency call button is generated, and the bit string is set in the area 702. The

  The mobile phone number, IP address, and MAC address, which are identification information of the wireless terminal 100 set in the areas 703 to 705, are stored in the identification information storage unit 102. The identification information of the wireless terminal 100 is transmitted to the emergency destination device 500, and when the communication is attempted from the emergency destination device 500 to the wireless terminal 100 when the line is disconnected in the middle of the communication, Used when there is a need to identify 100 users.

Each area other than the vendor area conforms to the IEEE 802.11b standard and will not be described.
FIG. 3 is a diagram showing the correspondence between the destination designation information of the emergency destination device 500 and the telephone number. As shown in the figure, the telephone number correspondence table 800 is configured by associating destination designation information 801 and telephone numbers 802 for each emergency contact device 500 such as the police 501 and the fire department / emergency 502.

The destination designation information 801 is a bit string indicating the type of the emergency call destination 500, and corresponds to the destination designation information set in the area 702 shown in FIG. In the first embodiment, since different bit strings are assigned to the police 501 and the fire / emergency 502 as destination designation information, it is represented by 1 bit.
The telephone number 802 is a telephone number assigned to the emergency contact device 500 such as the police 501 and the fire / emergency 502.

FIG. 3 shows that, for example, when the police 501 is designated as the destination, the destination designation information is “0” and the telephone number is “110”.
<Operation>
Hereinafter, an operation related to emergency transmission in the voice call system having the above-described configuration and handling the above-described data will be described with reference to FIG.
<Operation of Wireless Terminal 100>
First, the operation of the wireless terminal 100 will be described.

  When the user presses one of the emergency call buttons provided for each emergency call destination such as the police 501 or the fire department / emergency 502, the operation unit 101 of the wireless terminal 100 designates a destination corresponding to the emergency call button. An emergency call instruction signal including information is transmitted to the emergency call request unit 103. The emergency call request unit 103 transmits an emergency call request signal generated from the telephone number, IP address, MAC address, and emergency call instruction signal, which are identification information stored in the identification information storage unit 102, to the communication unit 104. Broadcast (step S11).

  When the connection request signal is transmitted from the relay device 300 through the communication unit 104, the connection request detection unit 105 detects this (step S12). Although not shown in FIG. 4, if the connection request detection unit 105 cannot detect the connection request signal within a predetermined time after the emergency call request unit 103 first transmits the emergency call request signal, the connection request The detection unit 105 transmits an undetected signal to the display unit 106, and the display unit 106 displays that the connection request signal from the relay device cannot be detected, as shown in the liquid crystal display 1001 of FIG.

  When the connection request signal transmitted from the relay device 300 is detected, the connection request detection unit 105 transmits a connection request reception signal for instructing a response to the connection request signal to the response unit 107. The response unit 107 transmits a connection permission signal for permitting connection to the wireless terminal 100 to the relay device 300 to the relay device 300 through the communication unit 104 (step S13). Although not shown in FIG. 4, if the connection request signal transmitted from the relay device 400 is detected after detecting the connection request signal transmitted from the relay device 300, the connection request detection unit 105 The connection request reception signal is not sent to the response unit 107 and is ignored.

When a connection completion signal indicating that the connection from the relay device 300 to the emergency destination device 500 is completed is transmitted from the relay device 300, the voice data transmission unit 109 detects this through the communication unit 104 (step S14).
The audio data transmission unit 109 transmits the audio data input from the microphone 108 by the user to the relay device 300 via the communication unit 104. In addition, when the communication unit 104 of the wireless terminal 100 receives the audio data of the emergency destination device 500 transmitted from the relay device 300, the communication unit 104 transmits the audio data to the speaker 110. The above audio data transmission / reception is performed until the line is disconnected (step S15).

  When the line is disconnected from the wireless terminal 300, the operation unit 101 sends an emergency call requesting unit 103 with a disconnection request instruction signal for canceling the connection with the relay device corresponding to the disconnection button when the user presses the disconnection button. To communicate. When the disconnection request instruction signal is transmitted, the emergency call requesting unit 103 generates and transmits a disconnection request signal for requesting the relay device 300 to disconnect the line with the wireless terminal 100 through the communication unit 104. When the communication unit 104 receives a disconnection permission signal for permitting disconnection of the line from the relay device 300, the line between the wireless terminal 100 and the relay device 300 is disconnected (step S16).

On the other hand, when the line is disconnected from the emergency call destination device 500, when the connection request detection unit 105 receives a disconnection request signal for requesting disconnection of the line transmitted from the relay device 300 through the communication unit 104, the response A disconnection request reception signal for instructing a response to the disconnection request signal to unit 107 is transmitted. The response unit 107 transmits to the relay device 300 a disconnect permission signal for permitting disconnection of the line with the wireless terminal 100 through the communication unit 104, and the line between the wireless terminal 100 and the relay device 300 is disconnected ( Step S16).
<Operation of Relay Device 300>
Next, the operation of the relay device 300 will be described.

When an emergency call request signal is transmitted from the wireless terminal 100, the emergency call request detection unit 302 detects this via the communication unit 301 (step S21).
The emergency call request detecting unit 302 transmits the destination designation information to the destination specifying unit 303, transmits the identification information of the wireless terminal 100 to the voice data relay unit 304, and transmits the emergency call request reception signal to the connection request unit 305. The destination identifying unit 303 identifies the telephone number corresponding to the destination designation information and transmits the telephone number to the voice data relay unit 304. The connection request unit 305 transmits a connection request signal for the wireless terminal 100 to the wireless terminal 100 through the communication unit 301 (step S22).

  When the connection permission signal is transmitted from the wireless terminal 100, the voice data relay unit 304 detects this through the communication unit 301 (step S23). Although not shown in FIG. 4, when the connection request unit 305 cannot detect the connection permission signal within a predetermined time after transmitting the connection request signal to the wireless terminal 100, the voice data relay unit 304 The process ends. For example, when the connection request signal of the relay apparatus 400 is detected after the wireless terminal 100 detects the connection request signal of the relay apparatus 300, the connection request signal of the relay apparatus 400 is ignored, and the relay apparatus 400 Since the connection permission signal cannot be detected, the process is terminated.

  The voice data relay unit 304 transmits an INVITE signal indicating that a session is started to the emergency call destination device 500 destined for the telephone number specified by the destination specifying unit 303 (step S24). The voice data relay unit 304 receives a Trying signal and a Ringing signal indicating that the INVITE signal transmitted from the emergency destination device 500 has been received and is being processed.

When the OK signal indicating that the INVITE signal has been processed normally is transmitted from the emergency destination device 500, the voice data relay unit 304 detects this (step S25), and a session is established in the emergency destination device 500. An ACK signal to that effect is transmitted. Thereby, the connection between the relay apparatus 300 and the emergency call destination apparatus 500 is established.
The voice data relay unit 304 transmits a connection completion signal to the wireless terminal 100 through the communication unit 301 (step S26).

  The voice data relay unit 304 transmits the identification information of the wireless terminal 100 to the emergency destination device 500, and receives voice data from the wireless terminal 100 through the communication unit 301. Transmit to destination device 500. When the voice data relay unit 304 receives voice data from the emergency destination device 500, the voice data relay unit 304 transmits the voice data to the wireless terminal 100 through the communication unit 301. The above voice data is relayed until the line is disconnected (step S27).

  When the line is disconnected from the wireless terminal 100, when the voice data relay unit 304 receives the disconnection request signal from the wireless terminal 100 through the communication unit 301, the voice data relay unit 304 sends a BYE signal to the emergency call destination device 500 to end the session. Send. An OK signal indicating that the BYE signal has been processed normally is received from the emergency destination device 500. As a result, the line between the voice data relay unit 304 and the emergency destination device 500 is disconnected. The voice data relay unit 304 transmits a disconnection permission signal to the wireless terminal 100 through the communication unit 301. Thereby, the line between the wireless terminal 100 and the relay device 300 is disconnected (step S28).

On the other hand, when the line is disconnected from the emergency destination device 500, when the voice data relay unit 304 receives the BYE signal from the emergency destination device 500, the voice data relay unit 304 transmits a disconnection request signal to the wireless terminal 100 through the communication unit 301. A disconnection permission signal is received from the wireless terminal 100. As a result, the line between the wireless terminal 100 and the relay device 300 is disconnected. An OK signal indicating that the BYE signal has been processed normally is transmitted to the emergency destination device 500. As a result, the line between the relay device 300 and the emergency destination device 500 is disconnected (step S28).
<Operation of Emergency Destination Device 500>
When the INVITE signal is transmitted from the relay device 300, the emergency destination device 500 detects this (step S31), and transmits a Trying signal and a Ringing signal.

The emergency destination device 500 transmits an OK signal in response to the INVITE signal from the relay device 300 (step S32), and receives an ACK signal from the relay device 300. Thereby, the connection between the relay apparatus 300 and the emergency call destination apparatus 500 is established.
The emergency destination device 500 receives the identification information and voice data of the wireless terminal 100 from the relay device 300. In addition, the voice data of the emergency destination device 500 is transmitted to the relay device 300. The above audio data transmission / reception is performed until the line is disconnected (step S33).

When the line is disconnected from the emergency destination device 500, the emergency destination device 500 transmits a BYE signal to the relay device 300. When the OK signal is received from the relay device 300, the line between the relay device 300 and the emergency destination device 500 is disconnected (step S34).
On the other hand, when the line is disconnected from the wireless terminal 100, the emergency destination device 500 transmits an OK signal when receiving the BYE signal from the relay device 300. As a result, the line between the relay device 300 and the emergency destination device 500 is disconnected (step S34).
<Connection sequence>
Next, a connection sequence among the wireless terminal 100, the relay device 300, and the emergency destination device 500 will be described with reference to FIG. The connection between the wireless terminal 100 and the relay device 300 is performed according to the unique protocol disclosed in the present invention. Connection between the relay device 300 and the emergency destination device 500 is performed according to SIP. The line can be disconnected from either the wireless terminal 100 or the emergency destination device 500. Here, a case where the call is terminated from the emergency destination device 500 will be described as an example.
<Connection between wireless terminal 100 and relay device 300>
First, a connection sequence between the wireless terminal 100 and the relay device 300 will be described.

The wireless terminal 100 transmits an emergency call request signal 901 to the relay device 300.
The relay device 300 that has received the emergency call request signal transmits a connection request signal 902 to the wireless terminal 100.
The wireless terminal 100 that has received the connection request signal 902 transmits a connection permission signal 903 to the relay device 300.

When the relay device 300 receives the connection permission signal 903, the connection between the wireless terminal 100 and the relay device 300 is established.
<Connection between relay device 300 and emergency destination device 500>
Next, a connection sequence between the relay device 300 and the emergency destination device 500 will be described.

The relay device 300 transmits an INVITE signal 904 to start the session to the emergency destination device 500.
The emergency destination device 500 that has received the INVITE signal 904 transmits a Trying signal 905 and a Ringing signal 906 indicating that the INVITE signal has been received and is being processed by the relay device 300.

The emergency destination device 500 transmits an OK signal 907 indicating that the INVITE signal 904 has been processed normally to the relay device 300.
The emergency destination device 500 transmits an ACK signal 908 indicating that a session has been established to the relay device 300.
When relay device 300 receives ACK signal 908, a connection between relay device 300 and emergency destination device 500 is established.
<Sending and receiving audio data>
Next, transmission / reception of audio data will be described.

The relay device 300 transmits to the wireless terminal 100 a connection completion signal 909 indicating that the connection between the relay device 300 and the emergency destination device 500 has been established.
The wireless terminal and the emergency destination device 500 that have received the connection completion signal 909 can make calls 910 and 911 via the relay device 300.
<Disconnect session>
Next, session disconnection will be described.

The emergency destination device 500 transmits a BYE signal 912 to end the session with the relay device 300 to the relay device 300.
The relay apparatus 300 that has received the BYE signal transmits a disconnection request signal 913 to release the connection between the radio terminal 100 and the relay apparatus 300 to the radio terminal 100.
The wireless terminal 100 that has received the disconnection request signal 913 transmits a disconnection permission signal 914 indicating that the connection with the relay device 300 is to be released. When the relay device 300 receives the disconnection permission signal 914, the connection between the wireless terminal 100 and the relay device 300 is released.

The relay device 300 that has received the disconnection permission signal 914 transmits an OK signal 915 indicating that the BYE signal 912 is successful to the emergency call destination device 500. When the emergency destination device 500 receives the OK signal 915, the connection between the relay device 300 and the emergency destination device 500 is released.
<Embodiment 2>
<System configuration>
The configuration of the voice call system according to the second embodiment will be described below.

In the first embodiment, a system has been described in which the wireless terminal 100 that makes an emergency call request connects to the relay apparatus 300 without receiving subscriber authentication in the ad hoc mode, and makes a voice call by making an emergency call.
In the second embodiment, although details will be described later, the wireless terminal 150 first attempts to connect to the relay device 350 after receiving subscriber authentication in the infrastructure mode.

  As a result of receiving the subscriber authentication in the relay device 350, when the wireless terminal 150 is not recognized as the wireless terminal of the connection service subscriber and the connection in the infrastructure mode is not permitted, the communication mode is changed to the ad hoc mode. Switch. As a result, when the connection in the infrastructure mode is not permitted, the wireless terminal 150 can make a voice call by connecting to the relay device 350 in the ad hoc mode without receiving subscriber authentication and making an emergency call. The system will be described. In addition, when the wireless terminal 150 is switched to the ad hoc mode, connected to the relay device 350, and making an emergency call, the wireless terminal 200 existing in the vicinity of the wireless terminal 150 performs a predetermined operation, so that the wireless terminal 150 A system for receiving voice data related to an emergency call between 150 and the emergency call destination device 500 will also be described.

As shown in FIG. 7, the voice call system according to the second embodiment includes wireless terminals 150 and 200, a relay device 350, an emergency destination device 500, and an IP network 600.
The wireless terminal 150 is a mobile phone having a VoIP connection function and a wireless LAN connection function, and is used by a user who makes an emergency call. As will be described in detail later, when the connection with the relay apparatus 350 is attempted in the infrastructure mode and the subscriber authentication is performed, as a result of the connection being made in the infrastructure mode, the IP network 600 passes through the relay apparatus 350. Therefore, the emergency call destination device 500 is directly connected to make an emergency call. On the other hand, when the connection cannot be made in the infrastructure mode, the mode is switched to the ad hoc mode to connect to the relay device 350 without receiving the subscriber authentication, and the emergency call is made as in the first embodiment.

  The wireless terminal 200 is a mobile phone of a connection service subscriber in the relay device 350 and has the same configuration as the wireless terminal 150. As a result of receiving the subscriber authentication, the wireless terminal 200 can be connected to the relay device 350 in the infrastructure mode. Therefore, the wireless terminal 200 can be connected to the IP network 600 through the relay device 350 and directly to the emergency destination device 500. Connectable.

Although details will be described later, by performing a predetermined operation, it is possible to receive voice data related to an emergency call transmitted / received between the wireless terminal connected to the relay apparatus 350 in the ad hoc mode and the emergency call destination apparatus 500. .
In the operation stage of the system, there may be a plurality of wireless terminals within the reach of the radio waves of the relay device, and the wireless terminals 150 and 200 are one of such wireless terminals.

The relay device 350 is generally called an access point having a subscriber authentication function, that is, a function of determining whether the wireless terminals 150 and 200 to be connected are wireless terminals of connection service subscribers.
For wireless terminals other than the connection service subscriber, the voice data related to the emergency call transmitted and received between the wireless terminal described in the first embodiment and the emergency call destination device 500 is relayed, and the connection service subscriber's For the wireless terminal, data relaying is also performed between the wireless terminal and other than the emergency destination device 500 as a general access point. In addition, when a predetermined operation is performed from the wireless terminal 200, voice data related to an emergency call transmitted and received between the wireless terminal 150 and the emergency call destination device 500 is transmitted.

The emergency call destination device 500 and the IP network 600 are the same as those in the first embodiment, and a description thereof will be omitted.
<Configuration of wireless terminal 150>
Hereinafter, the configuration of the wireless terminal 150 will be described.
As shown in FIG. 7, the wireless terminal 150 includes a connection request detection unit 105, a response unit 107, a microphone 108, a speaker 110, an operation unit 151, an identification information storage unit 152, an emergency call request unit 153, a communication unit 154, and a display unit 155. , A voice data transmission unit 156, a beacon signal detection unit 157, a communication method setting unit 158, and an authentication request unit 159. The following functions of the emergency call request unit 153, the voice data transmission unit 156, the beacon signal detection unit 157, the communication method setting unit 158, and the authentication request unit 159 cause the CPU to execute a program stored in the memory. It is realized by. In this embodiment, data exchange between programs is expressed as signal exchange.

In the following, parts different from the first embodiment will be described.
Similar to the operation unit 101, the operation unit 151 includes a key group such as a so-called numeric keypad and a button group, and is used when a user performs a predetermined operation. The button group includes an emergency call receiving button for requesting reception of an emergency call in addition to an emergency call button and a disconnect button included in the operation unit 101.

Although details will be described later, when the user presses the emergency call reception button when a predetermined display is displayed on the display unit 155, a reception instruction signal corresponding to the emergency call reception button is generated, and the authentication request unit 159 To communicate.
The identification information storage unit 152 is a non-volatile memory similar to the identification information storage unit 102. In addition to the identification information of the wireless terminal 150 stored in the identification information storage unit 102, the user identification information and password of the connection service to which the user of the wireless terminal 150 subscribes are stored. The user identification information and password are stored by the user. It is stored in the identification information storage unit 152 by an input made when connecting to the joining relay device for the first time.

When an emergency call instruction signal is transmitted from the operation unit 151, the emergency call request unit 153 first instructs the communication method setting unit 158 to set the communication mode in order to attempt connection with the relay device 350 in the infrastructure mode. It has a function of transmitting an instruction reception signal.
As a result of receiving the subscriber authentication, when the connection in the infrastructure mode is not possible and the setting completion signal indicating that the communication mode is changed to the ad hoc mode is transmitted from the communication method setting unit 158, the emergency start request unit 103 Similarly to the above, it has a function of generating an emergency call request signal and transmitting it to the relay device 350 through the communication unit 154.

The communication unit 154 operates by switching between the infrastructure mode and the ad hoc mode according to the signal transmitted from the communication method setting unit 112, and transmits / receives data to / from the relay apparatus 350. This circuit performs mutual conversion between a signal and a radio signal for wireless LAN.
The display unit 155 includes a liquid crystal display (LCD), and when a notification information reception signal (to be described later) is transmitted from the beacon signal detection unit 157, an emergency call request indicating that an emergency call request has been made from another wireless terminal. Display.

  The audio data transmission unit 156 has a connection function based on a non-volatile memory that stores data illustrated in FIG. 3 and VoIP, and has a function of transmitting audio data input from the microphone 108. When wireless terminal 150 is connected to relay apparatus 350 in the infrastructure mode, it connects to emergency destination apparatus 500 using SIP, and transmits voice data input from microphone 108 to emergency destination apparatus 500. .

On the other hand, when the wireless terminal 150 cannot connect to the relay device 350 in the infrastructure mode and connects in the ad hoc mode, the voice data input from the microphone 108 is input to the relay device 305 in the same manner as the voice data transmission unit 109. Send.
The beacon signal detection unit 157 has a function of receiving a beacon signal described later from the relay device 350. The beacon signal includes information indicating the SSID of the relay device 350 that is information for connecting to the relay device 350. Using this information, the information indicating the SSID is authenticated in order to connect to the relay device 350. This is transmitted to the request unit 159. When the beacon signal includes notification information to be described later, a notification information reception signal that is a signal indicating that the notification information has been received is transmitted to the display unit 155.

  The communication method setting unit 158 has a function of changing the communication mode of the communication unit 154 to the infrastructure mode or the ad hoc mode according to the signal transmitted from the emergency call request unit and the signal received from the relay device 350. Further, when a signal indicating that the communication mode has been changed is transmitted from the communication unit 154, a signal for performing a predetermined instruction is transmitted to the emergency call request unit 153 and the authentication request unit 159 according to the content of the signal. .

The authentication request unit 159 reads the user identification information and password stored in the identification information storage unit 152 in accordance with the signal transmitted from the communication method setting unit 158, generates an authentication request signal including the user identification information and password, and generates the relay request device 305. And has a function of attempting connection in infrastructure mode.
In addition, a transmission instruction for instructing transmission of voice data related to an emergency call request transmitted / received between the wireless terminal existing in the vicinity of the wireless terminal 150 and the emergency call destination device 500 according to the signal transmitted from the operation unit 151 It has a function of generating a signal and transmitting it to the relay device 350.
Information indicating the SSID of the relay device 350 transmitted from the beacon signal detection unit 157 is used for transmission of the signal to the relay device 305.
<Configuration of relay device 350>
Next, the relay device 350 will be described.

  As shown in FIG. 7, the relay device 350 includes a first communication unit 301, an emergency call request unit 302, a destination specifying unit 303, a connection request unit 305, a voice data relay unit 351, a broadcast transmission unit 352, a beacon signal detection unit 353, A second communication unit 354 and an authentication unit 355 are included. The first communication unit 301 in the figure is the same as the communication unit 301 of the first embodiment, but the name has been changed to be distinguished from the second communication unit of the second embodiment. Note that the following functions of the beacon signal detection unit 307, the authentication unit 355, and the broadcast transmission unit 352 are realized by causing the CPU to execute a program stored in the memory. In this embodiment, data exchange between programs is expressed as signal exchange.

In the following, parts different from the first embodiment will be described.
In addition to the function of the voice data relay unit 304, when the voice data relay unit 351 receives voice data related to the emergency call request from the wireless terminal 150, the voice data reception signal indicating that the voice data has been received is sent to the broadcast transmission unit 352. Is transmitted, and a signal indicating that the audio data is received from the broadcast transmission unit 352 is transmitted, the audio data is transmitted to the broadcast transmission unit 352.

In accordance with the signal received from the voice data relay unit 351, the broadcast transmission unit 352 transmits a notification request signal instructing the beacon signal transmission unit 353 to add notification information indicating that an emergency call request has been made.
When the broadcast transmission unit 352 receives a transmission instruction signal from the wireless terminal 200 through the second communication unit 354, the broadcast transmission unit 352 transmits a transmission signal indicating that the audio data is transmitted to the audio data relay unit 351, and the audio data relay When audio data is transmitted from the unit 351, the audio data is transmitted to the wireless terminal 200 through the second communication unit 354.

  The beacon signal transmission unit 353 has a function of periodically broadcasting a beacon signal through the second communication unit 354 of the relay device 350. Although details of the configuration of the beacon signal will be described later, the beacon signal includes information indicating the SSID of the relay device 350. When receiving the beacon signal, the wireless terminals 150 and 200 within the reach of the radio wave of the relay device 350 can attempt to connect to the relay device 350 using information indicating the SSID included in the beacon signal. The information indicating the beacon signal and the SSID is based on the IEEE 802.11b standard.

In addition, when a notification request signal is received from the broadcast transmission unit 352, a beacon signal to which notification information, which is information indicating that an emergency call request is made from the wireless terminal 150, is generated, and is transmitted through the second communication unit 354. And a function of broadcasting a beacon signal.
The second communication unit 354 is a circuit that operates in the infrastructure mode, transmits / receives data to / from the wireless terminals 150 and 200, and performs mutual conversion between the electrical signal and the wireless LAN radio signal at the time of transmission / reception.

When the authentication unit 355 receives the authentication request signal from the wireless terminal 150 through the second communication unit 354, the authentication unit 355 determines whether the wireless terminal is a connection service subscriber wireless terminal from the user identification information and password in the connection service included in the authentication request signal. The second communication unit transmits a connection permission signal for permitting connection if the terminal is a subscriber's wireless terminal, and a connection rejection signal for rejecting connection when the terminal is not a subscriber's wireless terminal. It has a function of transmitting to the wireless terminal 150 through 354.
<Data>
In addition to the data described in the first embodiment, data used in the voice call system will be described.

  FIG. 8 is a diagram illustrating a frame structure of a beacon signal that is generated and transmitted by the beacon signal transmission unit 353 of the relay device 350. The beacon signal 710 is compliant with the IEEE 802.11b standard, which is a wireless LAN standard. The beacon signal 710 includes a vendor area 711 that can be arbitrarily set by the user in accordance with the IEEE 802.11b standard, and the vendor area 711 further includes an area 712 in which notification information is set.

  The notification information set in the area 712 is a bit string indicating whether or not an emergency call request is made from the wireless terminal, and is set to 0 when no emergency call request is made. When an emergency call request is made from a wireless terminal and voice data is transmitted, the voice data relay unit 351 that receives the voice data transmits a voice data reception signal to the broadcast transmission unit 352, and the broadcast transmission unit 352 receives a notification request. The signal is transmitted to the beacon signal transmission unit 353. The beacon signal transmission unit 353 that has received the notification request signal sets the bit string of the area 712 to 1. As a result, 1 is set in the area 712, indicating that an emergency call request has been made.

Each area other than the vendor area conforms to the IEEE 802.11b standard and will not be described.
<Operation>
Hereinafter, an operation related to emergency transmission in the voice call system having the above-described configuration and handling the above-described data will be described.
<Operation of Wireless Terminal 150>
First, the operation of the wireless terminal 150 will be described with reference to FIG.

The beacon signal detection unit 157 receives the beacon signal transmitted from the relay device 350 through the communication unit 154, and transmits information indicating the SSID of the relay device 350 included in the beacon signal to the authentication request unit 159.
When one of the emergency call buttons is pressed by the user, the operation unit 151 transmits an emergency call instruction signal including destination designation information to the emergency call request unit 153.

The emergency call request unit 153 transmits an instruction reception signal to the communication method setting unit 158 and transmits destination designation information included in the emergency call instruction signal to the voice data transmission unit 156.
When the instruction reception signal is transmitted from the emergency call request unit 153, the communication method setting unit 158 transmits an infrastructure mode setting signal for setting the infrastructure mode to the communication unit 154. The communication unit 154 The mode is set to the infrastructure mode, the system is operated, and an infrastructure mode setting completion signal indicating that the setting is completed is transmitted to the communication method setting unit 158.

  When the communication method setting unit 158 transmits a setting completion signal indicating that the infrastructure mode is set to the authentication request unit 159, the authentication request unit 159 reads the user identification information and password in the connection service from the identification information storage unit 152. The authentication request signal is generated. The authentication request unit 159 uses the information indicating the SSID of the relay device 350 transmitted from the beacon signal detection unit 157, and transmits the generated authentication request signal to the relay device 350 through the communication unit 154 (step S41).

  When a connection permission signal or a connection refusal signal is transmitted from the relay device, the communication unit 154 receives this (step S42) and determines whether it is a connection refusal signal (step S43). If it is a connection rejection signal, the communication unit 154 transmits the connection rejection signal to the communication method setting unit 158. On the other hand, when it is a connection permission signal, the communication unit 154 transmits the connection permission signal to the voice data transmission unit 156.

The communication method setting unit 158 to which the connection refusal signal is transmitted transmits an ad hoc mode setting signal for setting the ad hoc mode to the communication unit 154. The communication unit 154 sets the communication mode to the ad hoc mode and operates it, and transmits an ad hoc mode setting completion signal indicating that the setting is completed to the communication method setting unit 158 (step S44).
The communication method setting unit 158 transmits to the emergency call requesting unit 153 a setting completion signal indicating that the ad hoc mode has been set. The emergency call request unit 153 generates an emergency call request signal from the telephone number, IP address, MAC address and the emergency call instruction signal, which are identification information of the wireless terminal 150 stored in the identification information storage unit 152, and the communication unit 154. Broadcast through. Thereafter, the emergency call processing is performed as described in the first embodiment (step S46).

  On the other hand, the voice data transmission unit 156 to which the connection permission signal has been transmitted specifies a telephone number from the destination designation information transmitted from the emergency call request unit 153, and communicates with the emergency call destination device 500 having the telephone number as the destination. The INVITE signal is transmitted through 154 and the relay device 350. The voice data transmission unit 156 receives the Trying signal and the Ringing signal transmitted from the emergency destination device 500 through the relay device 350 and the communication unit 154. When the voice data transmission unit 156 receives the OK signal, the voice data transmission unit 156 An ACK signal is transmitted to emergency destination device 500 through unit 154 and relay device 350. Thereby, the connection between the wireless terminal 150 and the emergency destination device 500 is established.

When the connection between the wireless terminal 150 and the emergency destination device 500 is established, the voice data transmission unit 156 transmits the voice data input from the microphone through the communication unit 154 and the relay device 350 using RTP. It transmits to the emergency destination device 500 (step S45).
In addition, when the communication unit 154 receives voice data from the emergency destination device 500 through the relay device 350, the communication unit 154 transmits this to the speaker 110 (step S45). The line disconnection is performed by the same procedure as in the first embodiment.
<Operation of Relay Device 350>
Next, the operation of the relay device 350 will be described with reference to FIG.

First, an operation related to connection with the wireless terminal 150 will be described.
The beacon signal transmission unit 353 broadcasts a beacon signal including information indicating the SSID of the relay device 350 through the second communication unit 354.
When the wireless terminal 150 that has received the beacon signal uses the information indicating the SSID of the wireless terminal 150 included in the beacon signal and transmits an authentication request signal to the relay device 350, the authentication unit 355 passes through the second communication unit 354. An authentication request signal is detected (step S51).

  The authentication unit 355 checks the user identification information and password in the connection service included in the authentication request signal, and determines whether the wireless terminal is a connection service subscriber (step S52). As a result, if it is a subscriber's wireless terminal, a connection permission signal is transmitted to the wireless terminal 150 through the second communication unit 354 (step S53). Thereafter, the second communication unit 354 relays the voice data transmitted from the wireless terminal 150 to the emergency call unit 500 (step S55).

On the other hand, if it is not the subscriber's wireless terminal, a connection rejection signal is transmitted to the wireless terminal 150 through the second communication unit 354 (step S54).
When the emergency call request detection unit 302 detects the emergency call request signal transmitted from the wireless terminal 150 through the first communication unit 301, the emergency call relay process is performed as described in the first embodiment (step S56). .

Next, an operation related to transmission of voice data related to an emergency call to the wireless terminal 200 will be described with reference to FIG.
In step S27 of FIG. 4 of the emergency call relay process described in the first embodiment, the voice data relay unit 351 receives voice data from the wireless terminal 150 (step S61).
The voice data relay unit 351 that has received the voice data transmits the voice data reception signal to the broadcast transmission unit 352. The broadcast transmission unit 352 transmits a notification request signal to the beacon signal transmission unit 353. The beacon signal transmission unit 353 generates a beacon signal to which the notification information is added, and broadcasts the beacon signal through the second communication unit 354 (step S62).

The broadcast transmission unit 352 receives a transmission instruction signal from the wireless terminal 200 through the second communication unit 354 (step S63).
The broadcast transmission unit 352 transmits a transmission signal to the audio data transmission unit 304, and when the audio data is transmitted from the audio data transmission unit 304, the broadcast transmission unit 352 transmits the audio data to the wireless terminal 200 through the second communication unit 354. (Step S64). The voice data is transmitted until the line between the wireless terminal 150 and the relay device 350 and the line between the relay device 350 and the emergency destination 500 are disconnected or the disconnect button on the operation unit 151 of the wireless terminal 200 is pressed. This is done until pressed by the user.
<Operation of Wireless Terminal 200>
Next, the operation of radio apparatus 200 will be described using FIG.

  The beacon signal detection unit 157 receives the beacon signal transmitted from the relay device 350 through the communication unit 154. If the received beacon signal includes the notification information (step S71), the notification information reception signal is transmitted to the display unit 155, and the display unit 155 displays other terminals as shown in 1002 in FIG. Display that an emergency call request has been made (step S72).

When the user presses the emergency call reception button (step S73), the operation unit 151 transmits a reception instruction signal to the authentication request unit 159. The authentication request unit 159 transmits a transmission instruction to the relay device 350 via the communication unit 154. A signal is transmitted (step S74).
When the communication unit 154 receives voice data transmitted from the relay device 350 and transmitted / received between the wireless terminal 150 and the emergency destination device 500 (step S75), the communication unit 154 transmits this to the speaker 110. The above voice data is received until the line between the wireless terminal 150 and the relay device 350 and the line between the relay device 350 and the emergency destination 500 are disconnected or the operation unit 151 of the wireless terminal 200 is disconnected. Repeat until the button is pressed by the user.
<Supplement>
As described above, the voice call system according to the present invention has been described based on the embodiment. However, the following modifications can be made, and the present invention is not limited to the voice call system as described in the above embodiment. Of course.
(1) In the above-described embodiment, the mobile terminals have been described as examples of the wireless terminals 150 and 200. However, if the wireless terminals have a wireless LAN connection function, PHS (Personal Handyphone System), PDA (Personal Digital Assistants), etc. It may be.
(2) In the above embodiment, the case where the operation unit 101 of the wireless terminal 150 has an emergency call button provided for each emergency call destination device 500 has been described as an example. A telephone number such as a telephone number may be directly input, or may be selected from a menu of the wireless terminal 150.
(3) In the above-described embodiment, the destination designation information of the emergency call destination device 500 and the identification information of the wireless terminal 150 have been described as being included in the emergency call request, but these are transmitted separately from the emergency call request. It is good to do.
(4) In the above embodiment, the case where the identification information of the wireless terminal 150 is sent to the emergency destination device 500 has been described as an example. However, the relay device 300 is provided with a storage unit, and the identification information of the wireless terminal 150 is provided there. May be stored for a predetermined period of time and referred to from the emergency destination device 500 as necessary.
(5) In the above-described embodiment, the frame structure of the emergency call request signal 700 has been described as conforming to the IEEE 802.11b standard, which is a wireless LAN standard. However, IEEE 802.11a, which is another wireless LAN standard. , G may be used.
(6) In the above-described embodiment, the location information of the wireless terminal 150 and the relay device 300 is not handled, but these information may be sent to the emergency destination device 500. Thereby, in the emergency contact address 500, the location of an accident etc. can be grasped | ascertained more correctly.
(7) In the embodiment described above, “110” and “119” are used as the telephone numbers 802 shown in FIG. 3 for the sake of explanation, but depending on the location where the relay device 300 is installed, the police, the fire department,・ A telephone number (06-xxxx-xxxx) for emergency etc. may be adopted.
(8) In the above-described embodiment, it is assumed that the wireless terminal 150 is within the radio wave reachable range of the relay device 300. However, if the radio terminal 150 is not within the radio wave reachable range, the radio terminal 150 is first placed near the radio terminal 150. An emergency call request signal is transmitted from the wireless terminal 150 to a second wireless terminal operating in an ad hoc mode near the first wireless terminal by transmitting an emergency call request signal to the first wireless terminal operating in a certain ad hoc mode. It is also possible to transmit the emergency call request signal by repeating the process of transmitting the signal until the n-th wireless terminal is within the reach of the radio waves of the relay device 300. As a result, an emergency call request can be made when the wireless terminal 150 cannot connect directly to the relay device 300.
(9) In the above-described embodiment, when there are a plurality of relay apparatuses, except for the connection request first detected by the connection request detection unit 105 of the wireless terminal 150, the radio wave intensity is equal to or greater than the threshold. The response unit 107 of the wireless terminal 150 may transmit a response that permits the connection to the relay apparatus that is the transmission source of the connection request detected first by the connection request detection unit 105 of the wireless terminal 150.

The voice call system according to the present invention is used for transmitting and receiving voice data.

1 is a configuration diagram of a voice call system according to Embodiment 1. FIG. It is a figure which shows the frame structure of the emergency call request signal which the radio | wireless terminal 100 transmits. It is a figure which shows the data structure and content example of a telephone number correspondence table | surface. 3 is a flowchart illustrating a processing procedure according to the first embodiment. It is a sequence diagram of the voice call system concerning Embodiment 1. 6 is a diagram illustrating a screen image of the wireless terminal 100 when a connection request signal from the relay device 300 cannot be detected. FIG. It is a block diagram of the voice call system concerning Embodiment 2. It is a figure which shows the frame structure of the beacon signal which the relay apparatus 350 transmits. 10 is a flowchart illustrating a connection processing procedure between the wireless terminal 150 and the relay device 350 according to the second embodiment. 10 is a flowchart illustrating a procedure for transmitting voice data related to an emergency call from the relay device 350 to the wireless terminal 150 according to the second embodiment. 6 is a diagram showing an emergency display screen image in the wireless terminal 200. FIG.

Explanation of symbols

100, 150, 200 Wireless terminal 101, 151 Operation unit 102, 152 Identification information storage unit 103, 153 Emergency call request unit 104, 154 Communication unit 105 Connection request detection unit 106, 155 Display unit 107 Response unit 108 Microphone 109 Audio data transmission Unit 110 Speaker 156 Audio data transmission unit 157 Beacon signal detection unit 158 Communication method setting unit 159 Authentication request unit 300, 350, 400 Relay device 301 Communication unit (first communication unit)
302 Emergency call request detection unit 303 Destination specifying unit 304, 351 Voice data relay unit 305 Connection request unit 352 Broadcast transmission unit 353 Beacon signal transmission unit 354 Second communication unit 355 Authentication unit 500 Emergency call destination device 501 Police 502 Fire fighting / emergency 600 IP network 1000 mobile phone 1001 liquid crystal display 1002 emergency display

Claims (10)

A voice call system including a wireless terminal and a relay device connected by a wireless LAN,
The wireless terminal is
A communication method that receives authentication and a communication method that does not receive authentication can be selected, a communication method that receives authentication is selected, and communication with the relay device is attempted.
Input means for receiving input from the user;
When the input accepted by the input means is a predetermined emergency call request, when the communication method to be authenticated is selected, the connection to the relay device is attempted, and the connection rejection response is received from the relay device To select a communication method that does not receive authentication, and to transmit the predetermined emergency call request to the relay device;
Connection request detection means for detecting a connection request transmitted from the relay device;
Response means for transmitting a predetermined response for permitting connection to the relay device when the connection request detected by the connection request detection means is a predetermined connection request;
Voice data transmitting means for transmitting voice data to the relay device that has transmitted a response permitting the connection by the response means;
The relay device is
Emergency call request detecting means for detecting the emergency call request transmitted from the wireless terminal;
Connection request means for transmitting the predetermined connection request to the wireless terminal when the emergency call request detected by the emergency call request detection means is a predetermined emergency call request;
Voice data relay means for transmitting the voice data received from the wireless terminal to a predetermined destination after receiving a predetermined response permitting the connection from the wireless terminal;
Authentication means for authenticating whether or not the wireless terminal can be connected and transmitting a predetermined connection rejection response when the wireless terminal is not permitted to connect;
A voice call system characterized by that. The voice call system according to claim 1, wherein the voice data relay means transmits voice data using VoIP (Voice over Internet Protocol). The relay device is
When the voice data is received from the wireless terminal, broadcast transmission means is provided for transmitting the fact that the predetermined emergency call request has been made to all the wireless terminals existing within the radio wave reach of the relay device. The voice call system according to claim 1. The voice data relay means further includes
Transmitting voice data received from the predetermined destination to the wireless terminal;
The wireless terminal further includes
Receiving means for receiving the audio data transmitted from the relay device;
The voice call system according to claim 1, further comprising output means for outputting the voice data received by the receiving means as voice. The input means receives information specifying a destination as the input,
The wireless terminal is
A destination transmission unit configured to transmit information specifying the destination input by the input unit to the relay device;
The relay device is
Destination receiving means for receiving information specifying the destination transmitted by the wireless terminal;
A destination specifying unit for specifying a destination based on information specifying the destination received by the destination receiving unit;
The voice call system according to claim 1, wherein voice data is transmitted with the destination specified by the destination specifying means as the predetermined destination. The wireless terminal is
Comprising identification information transmitting means for transmitting information for identifying the wireless terminal to the relay device;
The relay device is
An identification information relaying means for transmitting information for identifying the wireless terminal received from the wireless terminal to the predetermined destination after receiving a predetermined response permitting the connection from the wireless terminal. The voice call system according to claim 1. Within a predetermined period after the wireless terminal transmits the predetermined emergency call request,
The said connection request detection means outputs that so that the user of the said radio | wireless terminal can recognize, when the said predetermined | prescribed connection request transmitted from the said relay apparatus is not detected. Voice call system. In the case where there are a plurality of the relay devices,
The voice call according to claim 1, wherein the response means of the wireless terminal transmits a response permitting the connection only to a relay device that is a transmission source of the predetermined connection request detected first. system. A wireless terminal connected by a wireless LAN to a relay device that transmits voice data to a predetermined destination using VoIP,
The wireless terminal is
A communication method that receives authentication and a communication method that does not receive authentication can be selected, a communication method that receives authentication is selected, and communication with the relay device is attempted.
Input means for receiving input from a user of the wireless terminal;
When the input received by the input means is a predetermined emergency call request, the communication method to be authenticated is selected, the connection to the relay device is attempted, and the relay device performs authentication not permitting the connection. An emergency call request means for selecting a communication method that does not receive authentication when receiving a connection rejection response to the effect, and transmitting the predetermined emergency call request to the relay device;
Connection request detection means for detecting a connection request transmitted from the relay device;
Response means for transmitting a predetermined response for permitting connection to the relay device when the connection request detected by the connection request detection means is a predetermined connection request;
Voice data transmitting means for transmitting voice data to cause the relay apparatus that has transmitted a response permitting the connection to be transmitted to a predetermined destination using the VoIP protocol.
A wireless terminal characterized by that. A wireless terminal connected by a wireless LAN to a relay device that transmits voice data to a predetermined destination using VoIP,
The wireless terminal is
A communication method that receives authentication and a communication method that does not receive authentication can be selected, a communication method that receives authentication is selected, and communication with the relay device is attempted.
Input means for receiving input from the user;
When the input accepted by the input means is a predetermined emergency call request, when the communication method to be authenticated is selected, the connection to the relay device is attempted, and the connection rejection response is received from the relay device And an emergency call requesting means for sending the emergency call request to the relay device.
A wireless terminal characterized by that.

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