System and method for providing emergency warning broadcast

The present invention relates to an emergency warning broadcast providing system and an emergency warning broadcast providing method for providing an emergency warning broadcast to a user in an emergency.

In recent years, an emergency warning system (EWS) has been attracting attention as a means for transmitting an alarm in an emergency such as a natural disaster represented by a large earthquake. Currently, mobile communication terminals such as mobile phones equipped with a television broadcast reception function and a radio broadcast reception function (hereinafter referred to as "communication terminals") are widely used in society, and EWS signals are transmitted in an emergency. A method of transmitting to a communication terminal to provide an emergency warning broadcast is being considered.

In this way, in order for the communication terminal to receive data such as EWS signals, it is necessary to turn on the power of the functional parts of the television method transmission / reception function and the radio broadcast reception function in advance, or to put them in the standby state. However, when the power is on or in the standby state, power is consumed and the battery life is greatly reduced.

By the way, apart from the method of transmitting an EWS signal to a communication terminal to provide an emergency warning broadcast, there is also a method of distributing emergency information.

For example, in Patent Document 1 below, emergency information data is transmitted to the user using the Internet, a telephone communication network, or the like in order to notify the user that an abnormality has occurred in the emergency sender or the like and an emergency situation has occurred. The technology is described. According to the technology described in Patent Document 1, data communication is performed in any case such as during a call by a mobile phone, while connecting to the Internet, receiving a broadcast, and whether or not the received data is emergency information data. It can be determined. When the received data is emergency information data, the user is notified by sound, vibration, light, etc. that the emergency information data has been received, and the content of the emergency information is displayed on the screen. When the user confirms the contents of the emergency information and determines that the situation requires an urgent response, the user can suspend the current communication and control the emergency communication source or the like by the emergency communication. ..

<patcit num="1"><text>Japanese Patent Application Laid-Open No. 2005-295413</text></patcit>

<p> However, in the method of distributing emergency information using the Internet, a telephone communication network, or the like, the use of the line is restricted when the line is concentrated in an emergency or the like, so that it may not be possible to provide the user with timely information.</p><p> The present invention has been proposed in view of such conventional circumstances, and provides an emergency warning broadcast providing system and an emergency warning broadcast providing method capable of promptly providing emergency information with low power consumption. With the goal.</p>

<p> In order to achieve the above-mentioned object, the present invention includes a base station and a mobile communication terminal capable of communicating with the base station and receiving a broadcast transmitted from the broadcasting station, and from the broadcasting station in an emergency. In the emergency warning broadcast providing system that provides the user with the transmitted emergency warning broadcast, the base station transmits information indicating that the emergency warning broadcast is transmitted from the broadcasting station to the mobile communication terminal, and the mobile communication. The terminal is characterized in that when it receives information indicating that the emergency warning broadcast is transmitted from the base station, it makes it possible to receive the emergency warning broadcast transmitted from the broadcasting station.</p><p> Further, in order to achieve the above-mentioned object, the present invention includes a base station and a mobile communication terminal capable of communicating with the base station and receiving a broadcast transmitted from the broadcasting station, and the broadcasting is performed in an emergency. In the method used in the emergency warning broadcast providing system that provides the user with the emergency warning broadcast transmitted from the station, the base station transmits information indicating that the emergency warning broadcast is transmitted from the broadcasting station to the mobile communication terminal. When the mobile communication terminal receives the information indicating that the emergency warning broadcast is transmitted from the base station, the mobile communication terminal makes it possible to receive the emergency warning broadcast transmitted from the broadcasting station. It is a feature.</p>

<p> According to the present invention, the user does not need to keep the power supply of the television broadcast receiving function or the radio broadcast receiving function in the standby state or ON in preparation for an emergency, and consumes power by the television broadcast receiving function or the radio broadcast receiving function. It is possible to make it zero.</p>

Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an emergency warning broadcast providing system 100 according to an embodiment to which the present invention is applied.

The emergency warning broadcast providing system 100 includes a base station 1 that receives a broadcast wave transmitted from a broadcasting station 3 that broadcasts a television broadcast or a radio broadcast, and a mobile phone 2 that communicates with the base station 1. To.

The base station 1 includes an antenna 11A and an antenna 11B, a receiving unit 12, an EWS signal discriminating unit 13, an EWS detection / undetected signal generation unit 14, a control channel signal transmission / reception unit 15, and an information channel signal transmission / reception unit 16. , A demodulation unit 17, a communication control unit 18, and a modulation unit 19 are provided.

When the receiving unit 12 receives the broadcast wave transmitted from the broadcast station 3 via the antenna 11A, the receiving unit 12 performs demodulation processing on the broadcast wave, and performs processing such as coding on the signal obtained thereby. .. After that, the receiving unit 12 supplies the signal, which is the encoded digital data, to the EWS signal discriminating unit 13.

The EWS signal discrimination unit 13 determines whether or not the signal supplied from the reception unit 12 is an EWS signal, generates EWS signal discrimination result information indicating EWS signal detection or non-detection, and generates this EWS signal discrimination result information. Is supplied to the EWS detection / undetected signal generation unit 14.

Based on the EWS discrimination result information supplied from the EWS signal discrimination unit 13, the EWS detection / undetected signal generation unit 14 outputs an EWS detection signal in the case of EWS signal detection, and EWS is not detected in the case of no EWS signal detection. Generate a detection signal. After that, the EWS detection / undetected signal generation unit 14 supplies the EWS detection signal or the EWS undetected signal to the control channel signal transmission / reception unit 15.

The control channel signal transmission / reception unit 15 superimposes the EWS detection signal or the EWS undetected signal supplied from the EWS detection / undetection signal generation unit 14 on the control channel signal, and transmits the EWS detection signal or the EWS undetected signal to the mobile phone 2 via the antenna 11B.

Here, the control channel signal is used in any channel constituting the control channel described below, and is transmitted and received between the base station 1 and the mobile phone 2 to exchange information such as position confirmation. It is a signal.

As shown in Fig. 2, the radio channel in PDC (Personal Digital Cellular), which is a digital cellular mobile phone system standardized by ARIB (Association of Radio Industries and Businesses) in Japan, is the base station 1. It is composed of a control channel (CCH: control channel) for exchanging information with the mobile phone 2 and an information channel (TCH: traffic channel) for transmitting user information such as voice.

The CCH is composed of a broadcasting control channel (BCCH) and an associated control channel (ACCH). This CCH sends and receives data while controlling the time timing in order to avoid collision in random access.

BCCH is a one-way channel for transferring information that should be notified in common from the base station to all mobile stations in the cell, such as the area registration area number to which each cell belongs, and is a common control channel (CCCH). And a user packet channel (UPCH).

CCCH is a general term for two types of channels, such as a simultaneous calling channel (PCH: paging channel) and a common bidirectional control channel (SCCH: signaling control channel).

PCH is a channel for calling multiple cells at once when an incoming call arrives at a mobile station. It is basically one-way, but it may be bi-directional to return a response to the call.

SCCH is a bidirectional channel for transmitting control information other than notification and simultaneous call information required for connection control. Upstream channels are randomly emitted from each mobile station like a call request.

UPCH is a channel for providing wireless packet services. It transfers user information, but has the property of being commonly used by multiple mobile stations.

ACCH is composed of low-speed ACCH (SACCH: slow associated control channel) and high-speed ACCH (FACCH: fast associated control channel). SACCH is a channel for transferring low-speed control information without interrupting the transfer of user information such as voice. SACCH is especially called RCH when transferring information to control the quality of radio channels. RCH is closed in the radio section. FACCH is a channel provided so that when it is necessary to temporarily suspend the transfer of user information and transfer the control information, the control information can be transferred at high speed in order to shorten the interruption time.

As shown in Fig. 3, the control channel signal format is 6.6 msec as a slot unit, 6 slots as one frame of 40 msec, and this frame with a super frame (40 msec x 18) consisting of 18 frames as the frame period. It is composed by repeating the cycle.

As shown in FIG. 4, one slot has a lower layer composed of an address signal and a message signal. The predetermined bit pattern corresponding to the EWS detection signal or the predetermined bit pattern corresponding to the EWS undetected signal is assigned to a part of the message signal as additional information data.

In this way, the control channel signal transmission / reception unit 15 uses the EWS detection signal or the EWS undetected signal supplied from the EWS detection / undetection signal generation unit 14 as the control channel signal used in any channel constituting the control channel. Is superimposed on the mobile phone 2 and transmitted to the mobile phone 2 via the antenna 11B.

When the mobile phone 2 and another telephone perform a communication such as a call, the information channel signal transmission / reception unit 16 transmits / receives radio waves of an information channel in which an information channel signal which is user information such as voice is modulated. When the information channel signal transmission / reception unit 16 receives a radio wave of user information such as voice from the mobile phone 2 or another mobile phone, the information channel signal transmission / reception unit 16 supplies the radio wave to the demodulation unit 17.

The demodulation unit 17 takes out the user information signal by performing demodulation processing on the radio wave supplied from the information channel signal transmission / reception unit 16, and supplies the user information signal to the communication control unit 20.

The communication control unit 18 supplies the user information signal supplied from the demodulation unit 17 to the modulation unit 19 when the mobile phone 2 and another telephone perform communication such as a call.

The modulation unit 19 modulates the user information signal supplied from the communication control unit 18 with respect to the radio wave of the information channel, and supplies the radio wave of this information channel to the information channel signal transmission / reception unit 16.

The mobile phone 2 has an antenna 21A and an antenna 21B, a control channel signal transmission / reception unit 22, a demodulation unit 23, an EWS detection / undetected signal discrimination unit 24, a power supply 25A, a tuner 25B, and an output having a display and a speaker. It includes a broadcasting function unit 25 having a unit 25C, an information channel signal transmission / reception unit 26, a demodulation unit 27, a communication control unit 28, and a modulation unit 29. Here, the power supply 25A included in the broadcasting function unit 25 is turned off in advance.

The control channel signal transmission / reception unit 22 receives the radio wave of the control channel transmitted from the control channel signal transmission / reception unit 15 included in the base station 1 from the antenna 21A, and supplies the radio wave of this control channel to the demodulation unit 23.

The demodulation unit 23 demodulates the control channel signal from the radio waves of the control channel supplied from the control channel signal transmission / reception unit 22, and supplies the demodulated control channel signal to the EWS detection / undetected signal discrimination unit 24.

The EWS detection / undetected signal discrimination unit 24 determines whether the additional information signal incorporated in the control channel signal supplied from the demodulation unit 23 is an EWS detection signal or an EWS undetected signal, and determines whether the additional information is an EWS detection signal or an EWS undetected signal. When the signal of is an EWS detection signal, the power supply 25A provided in the broadcasting function unit 25 is turned from OFF to ON.

When the power supply 25A is turned on, the tuner 25B receives radio waves of television broadcasting or radio broadcasting from the broadcasting station 3 via the antenna 21B.

When the output unit 25C receives the radio wave of the television broadcast from the tuner 25B, the output unit 25C displays the image of the television broadcast on the display and outputs the sound of the television broadcast from the speaker, and the radio wave of the radio broadcast from the tuner 25B. Is received, the sound of the radio broadcast is output from the speaker.

When the mobile phone 2 communicates with another telephone such as a call, the information channel signal transmission / reception unit 26 transmits / receives radio waves of an information channel in which an information channel signal which is user information such as voice is modulated. When the information channel signal transmission / reception unit 26 receives a radio wave of user information such as voice in another mobile phone from the base station 1, the information channel signal transmission / reception unit 26 supplies this radio wave to the demodulation unit 27.

The demodulation unit 27 extracts the user information signal by performing demodulation processing on the radio wave supplied from the information channel signal transmission / reception unit 26, and supplies the user information signal to the communication control unit 28.

The communication control unit 28 supplies the user information signal supplied from the demodulation unit 27 to the modulation unit 29 when the mobile phone 2 communicates with another telephone such as a telephone call.

The modulation unit 29 modulates the user information signal supplied from the communication control unit 28 with respect to the radio wave of the information channel, and supplies the radio wave of this information channel to the information channel signal transmission / reception unit 26.

In the emergency warning broadcast providing system 100 according to the embodiment to which the present invention is applied, the user does not need to keep the power supply of the television broadcast receiving function or the radio broadcast receiving function in the standby state or ON in preparation for an emergency, and the television broadcasting It is possible to reduce the power consumption by the reception function or the radio broadcast reception function to zero.

Further, in the emergency warning broadcasting providing system 100 according to the embodiment to which the present invention is applied, it is possible to promptly provide emergency warning information to the user without being affected by the concentration of communication lines in an emergency. ..

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

For example, in the above-described embodiment, the EWS signal is transmitted from the broadcasting station 3 to the base station 1, but for example, the EWS signal may be transmitted to the base station 1 from an organization that predicts the occurrence of a disaster such as an earthquake. ..

Further, in the above-described embodiment, the EWS detection signal and the EWS undetected signal are superimposed on the signal of a specific channel in the control channel, but may be superimposed on the signal in all channels.

Further, in the above-described embodiment, the mobile phone equipped with the television broadcast receiving function and / or the radio broadcast receiving function has been described, but the mobile communication equipped with the television broadcast receiving function and / or the radio broadcast receiving function has been described. Any terminal may be used.

<figref num="1">It is a block diagram which shows the structure of the emergency warning broadcasting provision system in one Embodiment to which this invention is applied.</figref><figref num="2">It is a figure which shows the structure of the radio channel in PDC.</figref><figref num="3">It is a figure which shows the format of a control channel signal.</figref><figref num="4">It is a figure which shows the slot which constitutes the format of a control channel signal.</figref>

Code description

1 base station, 2 mobile phone, 3 broadcasting station, 12 receiver, 13 EWS signal discriminator, 14 EWS detection / undetected signal generator, 15,22 control channel signal transmitter / receiver, 24 EWS detection / undetected signal discriminator , 25 Broadcasting Function Department