JP2009130909A - Emergency information transmission system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a load of a SIP server due to call control performed between voice/IP conversion means installed within a number of houses or public institutions, when transmitting emergency information. <P>SOLUTION: When a first voice/IP conversion means calls an emergency information transmission server, a SIP server performs device authentication processing of the first voice/IP conversion means, the emergency information transmission server sends an acceptance permission of emergency information to the first voice/IP conversion means based on a result of authentication, and the first voice/IP conversion means sends the emergency information to the emergency information transmission server and registers it in response to the acceptance permission. The emergency information transmission server then transmits a communication permission request, to which an extension header is appended for identification from emergency information transmission, to a second voice/IP conversion means based on device authentication information being stored, and the second voice/IP conversion means receives the emergency information, without issuing a call arrival permission, in a case the extension header has device authentication registered by the second voice/IP conversion means itself. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  According to the present invention, emergency information such as earthquake, tsunami, wide area fire, flood, etc. can be transmitted to an arbitrary voice / IP conversion means by using an extended function of a session initialization protocol (hereinafter referred to as SIP). The present invention relates to an emergency information transmission system that can be used.

  As an emergency information transmission system, a wired or wireless broadcast network connecting broadcast reception terminals such as residents' residences and public facilities from a broadcast center in a specific area is formed, and emergency information using the broadcast network is transmitted Is known (see, for example, Patent Document 1). Further, as a recent technology, for example, there is an emergency information transmission system that uses an Internet protocol (hereinafter referred to as IP) network as a broadcast network and uses a computer device equipped with an IP receiver as a broadcast receiving terminal, for example. (For example, refer to Patent Document 2).

Further, as an emergency information transmission system using an IP network as a broadcast network, there is a system using a voice / IP conversion device as each broadcast reception voice / IP conversion means (see, for example, Patent Document 3). The conceptual configuration of the system of Patent Document 3 will be described with reference to FIG.
When information such as an earthquake, tsunami, fire or flood is obtained at the broadcasting center 4 in A city 1, the person in charge inputs voice, which is emergency information, from the microphone part of the broadcasting central facility 5. The voice input to the broadcast central facility 5 is converted into digital voice information by the voice / IP conversion means 6. This digital audio information is input to the intra server group 25 and transmitted to the distribution device 8 of the information service 3 via the regional intra network 7 which is an IP network. The distribution apparatus 8 appropriately specifies an IP address as a distribution destination of the information based on the detailed data in the received digital audio information under a preset condition, and then transmits the digital audio information to the IP network. Are transmitted through the regional intra-networks 9 and 10 and the information service network 11.

  The digital voice information with the destination specified in this way is provided with a voice enhancement function corresponding to a voice / IP conversion means 13 with a microphone function and a voice enhancement function corresponding to a building 12 such as a public facility or a general telephone 16 of a user's home 15. In addition to being received by the voice / IP conversion means 17, it is also received by the announcement broadcast server 14. The voice / IP conversion means 13 of the building 12 such as a public facility and the voice / IP conversion means 17 of the user's home 15 convert the received digital voice information into emergency information composed of analog voice information and broadcast it by a loudspeaker function. Immediately informed to surrounding residents. Further, the announcement broadcast server 14 specifies a destination to be notified of the received digital audio information under a preset condition, and then, PSTN (Public Switched Telephone Networks) and INS (Information Network). The data is transmitted to a voice / IP conversion means 20 with a loudspeaker function corresponding to the building 19 in the information service undeveloped area 2 via a communication network 18 such as a System ISDN network. The emergency information composed of the analog voice information converted by the voice / IP conversion means 20 is broadcast by the loudspeaker function and immediately notified to the surrounding residents.

  In the person-in-charge 22, voice information that is emergency information can be input from the microphone equipment 23 via the voice / IP conversion means 24, and in addition, the general telephone 16 in the user's house 15, a building 12 such as a public facility, etc. The voice function can also be input from the microphone function of the voice / IP conversion means 13. The emergency information input from these is converted into digital voice information by the corresponding voice / IP conversion means and transmitted to the distribution device 8, and then the voice / IP conversion means 13, 17 according to the previous case. , 20 broadcasts. Here, the general telephones 16 and 21 can be used as a general telephone through a general telephone line, and can also be used as a voice over internet protocol (Voice over Internet Protocol: hereinafter referred to as VoIP) telephone. It can be used as a wired telephone in a specific area.

JP-A-6-338864 JP 2003-008528 A JP 2005-242811 A

  The conventional emergency information transmission system configured as described above can notify emergency information to the residents by voice using wired or wireless, and uses voice / IP conversion means in the IP network as the transmission means. Excellent on. However, in the emergency information transmission system, a voice / IP conversion means installed in a specific area of the IP network or a protocol for distributing voice of emergency information using a VoIP telephone is not defined. In order to transmit emergency information using voice / IP conversion means in a conventional communication system, SIP call control is used. In the conventional SIP call control, when connecting from the voice / IP conversion means of the broadcast central equipment in the broadcast center to the voice / IP conversion means installed in each resident or public facility, the distribution device and each voice / IP conversion means Since a large amount of call control must be performed with this device, there is a problem in that the workload of the SIP server as the distribution device increases. Further, since the security means is not described in the network information transmitted from the voice / IP conversion means of the broadcast center facility in the broadcast center, there is a problem that the spoofed transmission is performed by reading the network information.

  The present invention has been made to solve the above-mentioned problems, and the load on the SIP server by call control performed with each voice / IP conversion means installed in a large number of houses and public facilities when emergency information is transmitted. The purpose is to obtain an emergency information transmission system that reduces the risk.

  The emergency information transmission system according to the present invention is installed in a broadcasting center and transmits a first voice / IP conversion means for transmitting voice emergency information, and a plurality of first voice / IP conversion means installed in a user's house or public facility for receiving emergency information. 2 voice / IP conversion means, registration of device authentication enabling each VoIP communication of each voice / IP conversion means, a register server for updating and storing the registered device authentication information, and voice stored in the register server The emergency information transmission server that obtains the device authentication information of the IP / IP conversion means at any time and stores it as an emergency information transmission destination, and the first information when the emergency information is transmitted based on the device authentication information stored in the emergency information transmission server An emergency information transmission system for transmitting emergency information by connecting a SIP server that performs device authentication processing of a call from the voice / IP conversion means of the voice / IP conversion means via a VoIP communication system network. When the first voice / IP conversion means makes a call to the emergency information transmission server to send emergency information, the SIP server performs device authentication processing of the first voice / IP conversion means and displays the established authentication result. The emergency information transmission server transfers the emergency information acceptance permission to the first voice / IP conversion means via the SIP server based on the authentication result, and the first voice / IP conversion means accepts the permission information. In response to the emergency information transmission server, the emergency information transmission server registers the emergency information as an SIP extension function for each of the second voice / IP conversion means based on the stored device authentication information. A communication permission request to which an extension header for identifying information transmission is added is transmitted, and the second voice / IP conversion unit registers itself in the extension header for identifying the communication permission request as emergency information transmission. If there is authentication is to receive the corresponding registration emergency information is transmitted as it is from the emergency information originating server without reply incoming permission.

  According to the present invention, an emergency information transmission server is added to an existing VoIP communication facility, and an extension header for identifying emergency information transmission as a SIP extension function is added, so that the emergency information transmission server replaces the SIP server with emergency information. Can be sent to individual voice / IP conversion means installed in the user's home or public facility, reducing the workload of the SIP server rather than sending emergency information through normal SIP call control, and promptly sending emergency information Can be informed. Also, when the encrypted information used for device authentication of each voice / IP conversion means is used for the parameter in the extension header that is identified as emergency information transmission, prevent impersonation transmission of emergency information by a third party And a secure emergency information transmission system can be constructed.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of an emergency information transmission system according to Embodiment 1 of the present invention. FIG. 2 is a sequence diagram showing the operation of the emergency information transmission system, and shows an operation of transmitting emergency information such as earthquake, tsunami, wide area fire, flood, etc. to IP telephones in various places using the SIP extension function.
In the figure, the emergency information transmission system includes an emergency information transmission server 30, a voice / IP conversion means (first voice / IP conversion means) 40 of a broadcasting center facility of a broadcasting center, and a SIP server 50 that performs SIP call control of VoIP communication. The device authentication of each of the plurality of voice / IP conversion means (second voice / IP conversion means) 60 and each of the SIP voice / IP conversion means 40, 60 installed in the user's home or public facility is registered. A register server 70 for storing the device authentication information is provided. It is assumed that the emergency information transmission server 30, the voice / IP conversion units 40 and 60, the SIP server 50, and the register server 70 are connected to the VoIP communication network 100 and registered in the same VoIP communication service. In addition, the voice / IP conversion means 40 of the broadcasting center equipment of the broadcasting center can be provided with a microphone function and a loudspeaker function, and the voice / IP conversion means 60 installed in a user's house or public facility can be provided with an IP telephone function. It shall be.

First, a device authentication sequence for enabling VoIP communication will be described.
The voice / IP conversion means 40 and 60 register device information in the register server 70 in order to obtain device authentication for VoIP communication. Therefore, when registering a device, first, a “REGISTER” request for requesting deletion of the previously registered device authentication information is transmitted to the register server 70 (S1). In response to this request, the register server 70 returns a “401 UNAUTHORIZED” response so as to perform digest authentication for each of the voice / IP conversion means 40, 60 (S2). Each voice / IP conversion means 40, 60 sets digest authentication information in the device authentication information, and transmits a “REGISTER” request for deleting the device authentication information to the register server 70 again (S3). In response to this, the register server 70 checks the digest authentication information in the message. If it is normal, the register server 70 deletes the device authentication information, and returns “200 OK” indicating the completion of registration deletion (S4).

Next, each voice / IP conversion means 40, 60 transmits a “REGISTER” request for registering new device authentication information to the register server 70 (S5). Then, the register server 70 returns a “401 UNAUTHORIZED” response so as to perform digest authentication for each of the voice / IP conversion means 40 and 60 (S6). Each voice / IP conversion means 40, 60 sets digest authentication information in the authentication information and transmits a “REGISTER” request for registering the device authentication information again (S7). In response to this, the register server 70 checks the digest authentication information in the message, registers new device authentication information if it is normal, and returns “200 OK” indicating the completion of registration to the voice / IP conversion means 40, 60. (S8). Note that the device authentication is performed using encrypted information.
The voice / IP conversion means 40, 60 periodically executes registration and deletion of the device authentication information in the register server 70 as described above. The device authentication information does not necessarily have to be deleted, and there is a sequence in the form of update.

Next, a registration device inquiry sequence from the emergency information transmission server 30 to the register server 70 will be described.
First, the emergency information transmission server 30 transmits a message requesting all registered device authentication information such as the voice / IP conversion means 40, 60 to the register server 70 (S9). Upon receiving the device authentication information request, the register server 70 authenticates the request, determines whether the request can be approved, and returns “200 OK” indicating approval completion if the request can be approved (S10). ). Next, the register server 70 returns an answer message including the requested device authentication information (this information is individual encrypted information of the voice / IP conversion means) to the emergency information transmission server 30 (S11). Upon receiving the answer message, the emergency information transmission server 30 returns “200 OK” indicating the completion of reception (S12), and stores the device authentication information of each voice / IP conversion means 40, 60 described in the answer message. Keep it.
Furthermore, the register server 70 provides the emergency information transmission server 30 with the change / addition information as an answer message each time the requested device authentication information is changed or when the device authentication information is newly registered. Send. The device authentication information acquisition request from the emergency information transmission server 30 to the register server 70 as described above is periodically executed, and the latest device information is always acquired.

Next, a sequence for transmitting emergency information will be described.
When the broadcast center obtains information such as an earthquake, tsunami, fire or flood, the person in charge calls the emergency information as voice from the voice / IP conversion means 40 in the broadcast central equipment to the emergency information transmission server 30. To do. The means for making a call is normal SIP call control, and an “INVITE” request is transmitted from the voice / IP conversion means 40 to the SIP server 50 (S13). The SIP server 50 determines whether the “INVITE” request is for the authenticated voice / IP conversion means 40, and sends a “407 PROXY AUTHENTICATION REQUIRED” response to an “INVITE” request that does not contain authentication information. It returns to the voice / IP conversion means 40 (S14). Upon receiving the “407 PROXY AUTHENTICATION REQUIRED” response, the voice / IP conversion means 40 transmits an “ACK” request indicating completion confirmation for the “INVITE” request to the SIP server 50 (S15), and again sets the authentication information “ An "INVITE" request is transmitted (S16). Upon receiving the “INVITE” request with authentication, the SIP server 50 reads the TO header information in the “INVITE” request and transfers it to the emergency information transmission server 30 that is the destination (S17).

When the emergency information transmission server 30 reads the FROM header information in the received “INVITE” request and determines that the request is an “INVITE” request from the voice / IP conversion means 40 that has been registered in advance as an emergency information transmission terminal, “200 OK” indicating permission to accept information is returned to the voice / IP conversion means 40 via the SIP server 50 (S18). Upon receiving the “200 OK” response, the voice / IP conversion means 40 transmits an “ACK” request indicating completion confirmation for the “INVITE” request to the emergency information transmission server 30 via the SIP server 50 (S19). The voice data is sent to the emergency information transmission server 30 for registration (S20).
Next, when the emergency information transmission server 30 receives and registers the emergency information voice data, the device authentication information of the voice / IP conversion means installed in the user company house or public facility that is acquired and stored from the register server 70 is stored. An “INVITE” request (communication permission request) to which an extension header for identifying emergency information transmission is added is transmitted to each voice / IP conversion means 60 based on the above as an SIP extension function to replace the SIP server 50 (S21). It should be noted that the encrypted information for each voice / IP conversion means registered by device authentication is described in the parameter in the extension header that is identified as emergency information transmission.

  Each voice / IP conversion means 60 checks whether or not there is an extension header to be identified as emergency information transmission in the received “INVITE” request. If the extension header exists, the parameter in the extension header is registered by its own device authentication. It is determined whether the encrypted information is correct. Next, if the encrypted information registered by own device authentication is described in the extension header of the received “INVITE” request, it is transmitted from the emergency information transmission server 30 only when it is determined that the emergency information is transmitted to the own device. The registered emergency information is received (S22). If it is determined that the emergency information is transmitted to the own device, a bell of a general telephone connected to each voice / IP conversion means 60 can be ringed as an advisory to the residents (S23). In the above case, when an “INVITE” request to which an extension header for identifying emergency information transmission is added is received, it is not necessary to return “200 OK” indicating completion of reception for the “INVITE” request. Thereby, the work load of the emergency information transmission server 30 can be reduced accordingly.

According to the first embodiment, the emergency information transmission server 30 is added to the SIP server 50 and the register server 70 that realize the existing VoIP communication, and each of the voice / IP conversion units 40 and 60 is added to the register server 70. Device authentication information is registered to update and store device authentication information, and the emergency information transmission server 30 acquires and stores the device authentication information of the voice / IP conversion means stored in the register server 70 as an emergency information transmission destination. When the emergency information is transmitted, the SIP server 50 performs the device authentication process for the call from the voice / IP conversion means 40, and the emergency information from the voice / IP conversion means 40 is sent to the emergency information transmission server 30 for registration. Then, the emergency information transmission server 30 is connected as a SIP extension function to each of the voice / IP conversion means 60 based on the stored device authentication information. An emergency information transmission server 30 is transmitted only when a communication permission request to which an extension header for identifying information transmission is added is transmitted, and the voice / IP conversion means 60 has a device authentication registered in the extension header for identification of emergency information transmission. The registered emergency information sent from is received. Therefore, by adding an extension header for identifying emergency information transmission as a SIP extended function, the emergency information transmission server 30 can provide individual voice / IP installed in the user's home or public facility instead of the SIP server 50. It is possible to make a call to the conversion means 60, and it is possible to reduce the workload of the SIP server 50 and to promptly notify the emergency information as compared with the case where emergency information is sent by normal SIP call control.
In the above example, the emergency information transmission server 30 uses the individual encrypted information of each voice / IP conversion means 60 used for device authentication as a parameter in the SIP extension header for emergency information transmission in the communication permission request. Only when the parameter in the extension header that the voice / IP conversion means 60 identifies and identifies as the emergency information transmission in the received SIP message is the encrypted information registered by its own device authentication. Therefore, it is possible to prevent impersonation transmission of emergency information by a third party and to construct a secure emergency information transmission system.
The construction of this emergency information transmission system can be realized by adding an emergency information transmission server in addition to the existing VoIP communication equipment and updating the software of the register server and each voice / IP conversion means. is there.

Embodiment 2. FIG.
FIG. 3 is a sequence diagram showing the operation of the emergency information transmission system according to the second embodiment of the present invention. In the figure, parts corresponding to those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted in principle.
In the case of Embodiment 1 shown in FIG. 2, when information such as an earthquake, tsunami, fire or flood is obtained at the broadcasting center, the person in charge transmits emergency information as voice from the voice / IP conversion means 40 in the broadcasting central equipment in advance. After registering with the server 30, it is transmitted. In contrast, in the second embodiment, the emergency information transmission server 30 is provided with an emergency information automatic voice guide function that stores various emergency information by voice prepared in advance, and disaster information is obtained at the broadcasting center. The person in charge selects emergency information corresponding to the contents of the disaster information from the automatic voice guidance function (S30), and transmits the selected emergency information from the transmission server 30 to each voice / IP conversion means 60. . As a result, the emergency information is transmitted from any IP telephone connected to each voice / IP conversion means 60, and the same effect as in the first embodiment can be obtained.

Embodiment 3 FIG.
The emergency information transmission server 30 in the second embodiment has an emergency information automatic voice guide function. In the third embodiment, emergency information transmitted from another network can be selected from the emergency information automatic voice guide function. Keep it like that. Then, when emergency information transmitted from another network is selected, the emergency information transmission server 30 transmits the selected emergency information to each voice / IP conversion means 60. This makes it possible to distribute more types of more detailed emergency information.

It is a block diagram which shows the structure of the emergency information transmission system by Embodiment 1 of this invention. It is a sequence diagram which shows operation | movement of the emergency information transmission system which concerns on Embodiment 1 of this invention. It is a sequence diagram which shows operation | movement of the emergency information transmission system which concerns on Embodiment 1 of this invention. It is a sequence diagram which shows operation | movement of the emergency information transmission system which concerns on Embodiment 2 of this invention. It is a sequence diagram which shows operation | movement of the emergency information transmission system which concerns on Embodiment 2 of this invention. It is explanatory drawing which shows the conceptual structure of the conventional disaster prevention emergency information notification system.

Explanation of symbols

  30 emergency information transmission server, 40 voice / IP conversion means in broadcasting center, 50 SIP server, 60 voice / IP conversion means installed in each house or public facility, 70 register server, 100 VoIP communication system network.

Claims (4)

A first voice / IP conversion means installed in the broadcasting center for transmitting emergency voice information;
A plurality of second voice / IP conversion means installed in a user's house or public facility and receiving emergency information;
A register server for registering device authentication that enables VoIP communication of each of the voice / IP conversion means, and updating and storing the registered device authentication information;
An emergency information transmission server for acquiring device authentication information of the voice / IP conversion means stored in the register server as needed and storing it as an emergency information transmission destination;
Based on the device authentication information stored in the emergency information transmission server, a VoIP communication system network is connected to a SIP server that performs device authentication processing of a call from the first voice / IP conversion means when emergency information is transmitted. Is an emergency information transmission system for transmitting emergency information by connecting via
When the first voice / IP conversion means calls the emergency information transmission server to send emergency information, the SIP server performs the device authentication process of the first voice / IP conversion means, and is established. Transfer the authentication result to the emergency information transmission server,
The emergency information transmission server sends emergency information acceptance permission to the first voice / IP conversion means via the SIP server based on the authentication result;
The first voice / IP conversion means sends emergency information to the emergency information transmission server in response to the acceptance permission, and registers,
The emergency information transmission server sends a communication permission request to which an extension header for identifying emergency information transmission is added as an SIP extension function to each of the second voice / IP conversion means based on the stored device authentication information. Send
If the second voice / IP conversion means includes the device authentication registered in the extension header that identifies the emergency information transmission as the communication permission request, the second voice / IP conversion means does not return the incoming call permission and returns from the emergency information transmission server. An emergency information transmission system for receiving corresponding registered emergency information to be transmitted. Registration of device authentication of each voice / IP conversion means performed by the register server is performed using encryption information,
The emergency information transmission server describes the individual encrypted information of each voice / IP conversion means used in the device authentication in the parameter in the SIP extension header for emergency information transmission in the communication permission request, and transmits it.
Each second voice / IP conversion means receives the emergency information only when the parameter in the extension header to be identified as the emergency information transmission in the received SIP message is the encrypted information registered by its own device authentication. The emergency information transmission system according to claim 1.   The emergency information transmission server includes an emergency information automatic voice guide containing various types of voice emergency information, and selects emergency information according to an instruction from the first voice / IP conversion means from the emergency information automatic voice guide function. 3. The emergency information transmission system according to claim 1, wherein the emergency information transmission system is configured to transmit to the second voice / IP conversion means.   The emergency information automatic voice guide function is configured to receive voice emergency information transmitted from another network and select the emergency information transmission target in the emergency information transmission server. 3. Emergency information transmission system according to 3.

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