JP2009271734A - Emergency information notification method and device in emergency information distribution system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emergency information notification method and device for instantaneously notifying emergency information without changing hardware. <P>SOLUTION: A home gateway (HGW) 20 functioning as an emergency information notification device is provided with: a communication means 201 having a VoIP function for receiving an INVITE packet for an emergency report from an SIP server 102 for an emergency report of a carrier system 10 in an address (address for emergency) corresponding to a telephone number given in advance for an emergency report; and a control means 203 for making a telephone set 21 ring by receiving the INVITE packet for an emergency report, and for displaying emergency information by a plurality of light emitting elements 205. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a system for distributing emergency information such as earthquake early warning, and more particularly to an emergency information notification method and apparatus.

  As is well known, an emergency earthquake bulletin distribution service was started in October 2007, and it has become possible to provide emergency earthquake bulletins not only for advanced users but also for general individuals and businesses. As a delivery method, adoption of multicast suitable for simultaneous delivery is being studied.

  Multicast has the advantage of being able to deliver earthquake early warnings in a relatively stable state without increasing the load on the entire distribution system, including the distribution server and distribution network. There is a demerit that it is limited only to individuals and companies. Generally, in a network such as the Internet, there is a case where a device that does not allow multicast packets to pass is installed, and multicast packets cannot be used on all networks. For this reason, many users may not be able to receive the emergency earthquake bulletin distribution service.

  Various systems have been proposed for the purpose of reliably transmitting such emergency bulletins. For example, the disaster warning system disclosed in Patent Document 1 generates an evacuation message and transmits it to a home gateway (HGW) installed in a house when the center apparatus detects an initial tremor of an earthquake. When the HGW receives the evacuation message, it converts it into a voice signal, and if there is a response to the call on the in-home / outside door phone, the HGW outputs the message.

  Also, in the emergency information notification method disclosed in Patent Document 2, when the key telephone main unit receives earthquake pre-information via the Internet, it converts the voice and notifies it to the key telephone, and the LCD or LED of the hot phone To notify as visible information.

JP 2007-188327 A JP 2007-281907 A

  However, in the system disclosed in Patent Document 1, an evacuation message is notified using a home / outdoor doorphone controlled by the HGW, but the center device (a server such as a local government or a telephone station) is provided in a plurality of areas. It is necessary to install in. Furthermore, the evacuation message is text data, and it is necessary to convert the voice into the HGW. This increases the load on the HGW and makes it difficult to process emergency information quickly.

  In the method disclosed in Patent Document 2, emergency earthquake information from the Japan Meteorological Agency is distributed to each user's house via a provider, converted into a voice signal by a key telephone main device, and output as voice by a key telephone. Therefore, as in Patent Document 1, a process for converting the received emergency information into speech is required, which causes problems such as complicated processing and increased load on the key telephone main device.

  An object of the present invention is to provide an emergency information notification method and apparatus that can immediately notify emergency information without changing hardware.

  The emergency information notifying device according to the present invention is an emergency information notifying device having a VoIP (Voice over IP) function, and an SIP (Session Initiation Protocol) server for emergency warning is assigned to an address corresponding to a telephone number for emergency warning given in advance. Communication means for receiving an INVITE packet for emergency bulletin from, and control means for ringing a telephone by receiving the INVITE packet for emergency bulletin and displaying emergency information by a plurality of light emitting elements. .

  According to the present invention, it is possible to immediately notify emergency information without changing hardware.

1. One Embodiment According to one embodiment of the present invention, by adding a function to a VoIP service that has become popular in recent years, it is possible to distribute emergency information to a user who has installed a VoIP router. Generally, an HGW (home gateway) is installed in the home of an individual user who subscribes to the VoIP service or in a company internal network. The HGW is a device for connecting a user's home network and an IP network represented by the Internet, and is usually rented or transferred to a user contracted by a telecommunications carrier.

  In this embodiment, an emergency information notification function is added to a widely used HGW to operate as an emergency information notification device, and an emergency early warning SIP server can be added to a communication carrier to enable emergency information breaking. To do.

  The HGW is provided with a telephone number for emergency early warning in addition to the telephone number for VoIP currently provided, and has a mechanism capable of managing two or more telephone numbers. A function for managing a plurality of telephone numbers is already provided in many HGWs. It is desirable that the telephone number for emergency bulletin set in the HGW is the same telephone number for a plurality of users. As a result, it is possible to prevent an enormous increase in the telephone numbers that must be managed when the telecommunications carrier provides the emergency bulletin distribution service. The telephone number for this emergency bulletin can be decided by the carrier, but it must not be duplicated.

  The HGW can have a SIP-URL for delivering an emergency bulletin, which will be described later, in addition to the SIP-URL (SIP server address) for the VoIP service currently provided. However, the telephone number for emergency bulletin and the SIP-URL for emergency bulletin must be associated within the HGW, and the telephone number used for VoIP delivery and the SIP-URL for VoIP service for emergency bulletin distribution Cannot be used.

  On the telecommunications carrier side, in addition to a normal SIP server for VoIP service, a SIP server dedicated to emergency early warning (hereinafter also referred to as SIP server 102 for early earthquake early warning) is prepared. Since the same emergency telephone number is used by a plurality of users, the emergency earthquake warning SIP server 102 should not use a telephone number as information for managing users. It should be managed by the source IP address of the packet.

  The HGW receives the emergency bulletin INVITE packet from the emergency bulletin SIP server, so that the telephone connected to the home network rings and controls a plurality of light emitting elements (such as LEDs) normally mounted on the HGW. Emergency information display. When the HGW receives the INVITE packet for emergency bulletin, it is desirable not to transmit a control signal other than the reception response. This is to avoid an increase in network load.

  Also, voice guidance can be generated based on emergency information contained in the emergency bulletin INVITE packet, and the voice guidance can be output when the user responds by off-hooking the telephone.

  Furthermore, it is desirable to change the light emission modes of the plurality of light emitting elements based on the emergency information included in the emergency early warning INVITE packet. For example, if the emergency information includes the estimated arrival time of the earthquake, calculate the time from the current time to the estimated arrival time of the earthquake and determine the length of time until the arrival by the display location or number of displayed LEDs Can be represented. This makes it possible to immediately recognize not only the ringing of the telephone and voice guidance, but also the remaining time from the light emitting element issue mode to the occurrence of the earthquake and its expected arrival time.

  Hereinafter, an embodiment of the present invention will be described in detail with an emergency earthquake bulletin delivered from the Japan Meteorological Agency as an example of emergency information.

2. 2. Embodiment 2.1) System Configuration FIG. 1 is a network diagram showing the overall configuration of an emergency information distribution system according to an embodiment of the present invention. Here, a plurality of user homes 1 to N are subscribed to the telecommunications carrier system 10, and the emergency earthquake bulletin delivered from the emergency earthquake bulletin delivery system 11 of the Meteorological Business Support Center passes through the telecommunications carrier system 10. It shall be delivered to each user's home.

  First, when seismometers installed nationwide observe an earthquake, the observation data is collected by the Japan Meteorological Agency, and the Meteorological Agency calculates the estimated earthquake arrival time and predicted seismic intensity for each region based on the collected data. The earthquake early warning distribution system 11 creates an emergency earthquake early warning from these results, distributes it to each telecommunications carrier, and sends the urgent earthquake early warning to the users who have contracted through each carrier's telecommunications carrier system 10. To deliver.

  The telecommunications carrier system 10 includes a SIP server 101 for a telephone service (VoIP service) using an IP packet, a SIP server 102 for earthquake early warning, and a telecommunications carrier server for controlling communication of the telecommunications carrier system 10. 103. The communication carrier server 103 performs communication control with the earthquake early warning distribution system 11 and the Internet 12 and also performs communication control with the home gateway (HGW) 20 of the user's home via the terminal device 104. The termination device 104 is OLT (Optical Line Termination) in the case of optical communication.

 In each user's home, a home network is configured on the LAN side of the HGW 20, and a personal computer (PC), an IP telephone 21 and the like are connected. If the telephone 21 is an analog telephone, it can be connected to the analog port of the HGW 20.

2.2) HGW
FIG. 2 is a block diagram showing a schematic configuration of the home gateway HGW shown in FIG. However, only the configuration related to the VoIP function according to the present embodiment is shown here.

  The WAN side of the HGW 20 is connected to the termination device 104 of the communication carrier system 10 by the termination device 201, and the IP telephone 21 and the PC are connected to the LAN side by the VoIP router 202. Although the overall operation of the HGW 20 is controlled by the control unit 203, emergency information notification related to the present embodiment is executed using the memory 204, the LED display unit 205, the audio output unit 206, and the display unit 207.

  The memory 204 stores an emergency address assigned in advance, emergency information received by emergency bulletin, and predetermined voice guidance information. The emergency address includes a SIP-URL and a telephone number for emergency bulletin distribution in addition to a SIP-URL (SIP server address) and a telephone number for the currently provided VoIP service. However, the telephone number for emergency bulletin and the SIP-URL are associated with each other, and the control unit 203 performs control so that the telephone number used for VoIP and the SIP-URL for VoIP service are not used for distribution of emergency bulletin.

  A plurality of LEDs are arranged on the LED display unit 205, and the remaining time and seismic intensity until the predicted earthquake arrival time are expressed by the number of light emitting LEDs, blinking, and the like according to the control of the control unit 203. The voice output unit 206 outputs voice guidance and warning sound stored in the memory 204 from the speaker under the control of the control unit 203. The display unit 207 is a liquid crystal display or the like, and can display the remaining time until the predicted earthquake arrival time and the seismic intensity in characters.

  Next, the emergency information distribution system and the emergency information distribution operation in the HGW 20 according to the present embodiment will be described in detail using an emergency earthquake warning as an example.

2.3) Emergency Information Delivery Operation FIG. 3 is a sequence diagram showing a procedure for delivering an emergency earthquake warning in the emergency information delivery system shown in FIG. 1 and an emergency information notification procedure in the HGW shown in FIG.

  First, when the user turns on the HGW 20 and starts up (Step S300), the WAN side terminal device 201 of the HGW 20 and the terminal device 104 of the operator system 10 are linked up and shift to a communicable state. The control unit 203 requests information necessary for network connection to the host side. Upon receiving a request from the HGW 20, the provider server 103 transmits information necessary for network connection such as a lent IP address and DNS server address information. When the control unit 203 of the HGW 20 receives necessary information from these servers, the control unit 203 sets the information in its own device. The SIP-URL of the SIP server 101 for VoIP, the address of the SIP server 102 for earthquake early warning and the information of the SIP-URL are also acquired at this timing and stored in the memory 204 (step 301).

  The HGW 20 transmits the SIP register packet to the VoIP SIP server 101 and the emergency earthquake warning SIP server 102 using the information acquired in step S301, and receives the SIP 200OK packet as a response to the SIP register packet (step S302). , S303). For example, taking step S303 performed with the emergency earthquake early warning SIP server 102 as an example, the HGW 20 transmits a register packet addressed to the emergency earthquake early warning SIP server 102 and receives the received emergency earthquake early warning SIP server. 102 can determine that the contract user has transmitted from the information included in the register packet. If it is determined that the packet is a register packet from the contract user, the emergency earthquake bulletin SIP server 102 starts managing the information and returns a 200 OK packet to the HGW 20 at the user's home as a response to the received register packet. However, since the telephone number for earthquake early warning is shared by a plurality of users as described above, the emergency earthquake early warning SIP server 102 cannot use the telephone number for information management.

  The preparation before the occurrence of the earthquake is completed as described above. However, when the IP address on the WAN side of the HGW 20 is changed, the register packet is retransmitted. Next, the operation when an earthquake occurs and the communication carrier receives an emergency earthquake bulletin from the weather service support center will be described.

  In FIG. 3, when an earthquake occurs and an earthquake early warning is transmitted (step S304), the telecommunications carrier server 103 of the telecommunications carrier system 10 receives the emergency earthquake early warning (step S305). Upon receiving the emergency earthquake bulletin, the server 103 immediately instructs the emergency earthquake bulletin SIP server 102 to distribute the bulletin (step S306). In response to this, the SIP server for earthquake early warning 102 generates an INVITE packet including an estimated earthquake arrival time and an estimated seismic intensity for each area from the area information of the contracted user's house (step S307), and sends it to each user's HGW 20 Distribute (step S308).

  More specifically, the emergency earthquake warning SIP server 102 transmits an INVITE packet to the HGW that has received the register packet and returned the 200 OK packet in the preparation stage before the occurrence of the earthquake in step S303 (step S308). This emergency bulletin INVITE packet is preferentially routed or forwarded by setting a priority bit in the IP header in order to increase the reach. This priority control is performed by redefining the ToS field in the case of an IPv4 packet, and the Traffic Class field in the case of an IPv6 packet. In addition, information on the expected arrival time and predicted seismic intensity of the earthquake is placed in the SDP field of the INVITE packet for emergency bulletin.

  When the HGW 20 receives the INVITE packet from the emergency earthquake warning SIP server 102, the HGW 20 registers the information on the predicted arrival time and the predicted seismic intensity stored in the SDP field in the memory 204 of the HGW 20 (step S309).

  Subsequently, in response to receiving the emergency early warning INVITE packet, the HGW 20 returns a 100 Trying packet to the emergency earthquake early warning SIP server 102 (step S310). Thereby, the emergency earthquake bulletin SIP server 102 determines that the HGW 20 has received the INVITE packet. If the 100 Trying packet is not received from the HGW 20 within a predetermined time, the emergency earthquake bulletin SIP server 102 determines that the previously transmitted INVITE packet has not reached the HGW 20 and retransmits the INVITE packet. However, it is desirable to determine the number of retransmissions of the INVITE packet in advance in consideration of a case where there is no response due to the HGW 20 not being turned on. Even if the upper limit of the number of retransmissions of the INVITE packet is not exceeded, the retransmission operation of the INVITE packet is stopped when the expected arrival time of the earthquake has passed. However, as will be described later, it is desirable that the response from the HGW 20 is only this 100 Trying packet in order to suppress an increase in network addition.

  In this way, the reachability of the emergency earthquake bulletin data from the emergency earthquake bulletin SIP server 102 to the HGW 20 can be improved.

  The control unit 203 of the HGW 20 returns a 100 Trying packet to the emergency earthquake bulletin SIP server 102, transmits a ringer to the connected telephone 21 (step S311), rings the telephone 21, and notifies the user of the earthquake early warning. Notify that you have received That is, the analog telephone or the IP telephone connected to the HGW 20 is ringed at the timing when the INVITE packet is received from the emergency earthquake warning SIP server 102.

  The telephone connected to the analog port of the HGW 20 is provided with a ringing function for ringing by IR signal and SIR signal, so that the user can make a ringing by a VoIP call or receive an earthquake early warning. Judgment can be made. What is necessary is just to notify a user about the difference in this ringing tone beforehand. In the case of an IP phone, since the ring tone is determined on the IP phone side, the user may set the ring tone for the earthquake early warning.

  When the information on the estimated arrival time and the predicted seismic intensity is registered from the INVITE packet for earthquake early warning in step S309, the control unit 203 determines the remaining time until the earthquake arrives from the estimated arrival time and the current time by the clock function of the own station. Time (hereinafter referred to as expected arrival time) is calculated (step S312). This estimated arrival time becomes shorter as time goes on. Then, the control unit 203 controls the LED display unit 205 to notify the user of the arrival time and the expected seismic intensity by turning on, turning off, or blinking (step S313). For example, when the LED display unit 205 includes five LEDs that can be switched between two colors, the expected time to reach an earthquake can be represented by the number of lighted LEDs, and the expected seismic intensity can be represented by the color of the LEDs. At this time, since the expected arrival time becomes shorter as time passes, the LED display mode is changed by accessing the expected arrival time entered in the memory 204 every second and comparing it with the current time. However, it is necessary to inform the user in advance about the correspondence between the LED display mode and the display information.

  Further, notifying the user of the predicted arrival time and predicted seismic intensity of the earthquake can be performed not only by the LED display unit 205 but also by using voice guidance stored in the memory 204 of the HGW 20. When the expected seismic intensity is large but there is a sufficient time until the earthquake arrives, emergency information notification to the user is performed by voice guidance from the handset of the telephone 21. In other words, when the telephone 21 rings by the ringer (step S311) and the user responds by off-hook (step S314), the control unit 203 adds to the voice guidance stored in the memory 204 the expected time and expected seismic intensity until the earthquake arrives. Is output from the receiver (step S315). For example, voice guidance such as “seismic intensity yy after xx seconds” is prepared, and for “xx” and “yy”, the expected arrival time is calculated at the off-hook timing, and the calculated expected arrival time and predicted seismic intensity Can be incorporated into the voice guidance. Alternatively, the time when the INVITE packet arrives at the HGE 20 is stored, the time from when the INVITE packet is received until the user lifts the handset of the telephone 21 is counted, and the counted arrival time is included in the INVITE packet By subtracting from the time, the expected arrival time at the off-hook timing can also be calculated.

  However, when the user off-hooks the handset of the telephone 21 (step S314), in order to avoid an increase in network load, the control unit 203 does not return a SIP 200OK packet as in a normal VoIP operation.

  Thus, when the estimated arrival time becomes zero, the ringing of the telephone 21 is stopped, and the lighting state of the LED display unit 205 is returned to the state display during normal use. The voice guidance is also stopped, and the emergency earthquake notification service is terminated by canceling the emergency information entered in the memory 204.

2.4) Effect As described above, according to the present embodiment, the emergency information is distributed and notified using the SIP protocol for the existing VoIP service and the function for receiving the VoIP service. Development costs can be reduced. Furthermore, since the existing network can be used when starting this service, the cost for starting operation can be reduced.

  In addition, if the HGW is equipped with a VoIP function, it is possible to realize the present embodiment only by uploading firmware. For example, if the user subscribes to the VoIP service, it is assumed that the power of the HGW 20 is always on, and the telephone 21 can be expected to be already connected. There is no need to install additional power or keep power on.

  Even a user who has not subscribed to the VoIP service is provided with the VoIP router 202 provided in the HGW 20 installed by the user and the HGW 20 installed by the user is equipped with the VoIP router 202. You can get an earthquake early warning service just by connecting.

  As described above, if a priority bit is assigned to a SIP packet that carries information related to the earthquake early warning, it is possible to distribute the earthquake early warning service packet with a relatively high probability even in a heavily loaded network. In addition, since the service can be provided using only a part of the SIP sequence during the VoIP call, the network load can be suppressed low.

  Although the SIP packet is UDP, SIP is a protocol that communicates with each other. Therefore, the reachability of the emergency earthquake warning can be confirmed, and the reliability is improved.

  The HGW 20 capable of VoIP waits for a limited SIP packet when the HGW itself transmits a SIP register packet to the SIP server. For this reason, it is not necessary to set IP masquerade or the like in the HGW 20 when receiving the earthquake early warning distribution service, and the possibility that the security level of the HGW 20 is lowered when receiving this service is extremely low.

  The present invention is applicable to a system that distributes emergency information such as an earthquake early warning to each user and a system that notifies each user of emergency information.

It is a network diagram which shows the whole structure of the emergency information delivery system by one Example of this invention. It is a block diagram which shows the schematic structure of the home gateway HGW shown in FIG. FIG. 3 is a sequence diagram illustrating a procedure for distributing an emergency earthquake bulletin in the emergency information distribution system illustrated in FIG. 1 and a procedure for notifying emergency information in the HGW illustrated in FIG. 2.

Explanation of symbols

1-N user home 10 telecommunications carrier system 11 earthquake early warning distribution system 12 internet 20 home gateway (HGW)
21 Telephone 101 VoIP SIP Server 102 Emergency Earthquake Warning SIP Server 103 Telecom Carrier Server 104 Termination Device 201 Termination Device 202 VoIP Router 203 Control Unit 204 Memory 205 LED Display Unit 206 Audio Output Unit 207 Display Unit

Claims (11)

An emergency information notification device having a VoIP (Voice over IP) function,
A communication means for receiving an emergency early warning INVITE packet from an emergency early warning SIP (Session Initiation Protocol) server at an address corresponding to an emergency early warning telephone number assigned in advance;
Control means for ringing a telephone by receiving the INVITE packet for emergency bulletin and displaying emergency information by a plurality of light emitting elements;
An emergency information notification device comprising:   2. The emergency information notification device according to claim 1, wherein the communication unit does not transmit a control signal other than a reception response when receiving the emergency prompt INVITE packet.   The said control means produces | generates voice guidance based on the emergency information contained in the said INVITE packet for emergency early warning, and outputs the said voice guidance when the said telephone responds. Emergency information notification device.   4. The emergency according to claim 1, wherein the control unit changes a light emission mode of the plurality of light emitting elements based on emergency information included in the emergency prompt INVITE packet. 5. Information notification device. A system for delivering emergency information to a plurality of user side communication devices having a VoIP (Voice over IP) function,
It has a SIP server for VoIP and a SIP server for emergency bulletin, and upon receiving emergency information, the SIP server for emergency bulletin transmits an emergency bulletin INVITE packet to an emergency bulletin phone number common to the plurality of user side communication devices An emergency information distribution system characterized by: Further comprising at least one telephone connected to the user side communication device;
The user side communication device is
Communication means for receiving the emergency bulletin INVITE packet at an address corresponding to the emergency bulletin phone number;
Control means for ringing the telephone by receiving the INVITE packet for emergency bulletin and displaying emergency information by a plurality of light emitting elements;
The emergency information distribution system according to claim 5, further comprising: An emergency information notification method in a communication device having a VoIP (Voice over IP) function,
Receive an emergency bulletin INVITE packet from the SIP (Session Initiation Protocol) server for emergency bulletin to the address corresponding to the telephone number for emergency bulletin assigned in advance,
The telephone is ringed by receiving the emergency bulletin INVITE packet, and emergency information is displayed by a plurality of light emitting elements.
An emergency information notification method characterized by that.   The emergency information notification method according to claim 7, wherein when the emergency bulletin INVITE packet is received, a control signal other than the reception response is not transmitted.   9. The emergency information notification method according to claim 7 or 8, wherein voice guidance is generated based on emergency information included in the emergency bulletin INVITE packet, and the voice guidance is output when the telephone responds. .   The emergency information notification method according to any one of claims 7 to 9, wherein a light emission mode of the plurality of light emitting elements is changed based on emergency information included in the emergency bulletin INVITE packet. A program for realizing an emergency information notification function in a communication device having a VoIP (Voice over IP) function in a computer,
A function of receiving an emergency bulletin INVITE packet from an emergency bulletin SIP (Session Initiation Protocol) server at an address corresponding to a predetermined emergency bulletin phone number;
A function of ringing a telephone by receiving the INVITE packet for emergency bulletin and displaying emergency information by a plurality of light emitting elements;
Is implemented on the computer.

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