KR100984059B1 - Apparatus and method for receiving digital emergency warning broadcasting message - Google Patents

Abstract

PURPOSE: A device and a method for receiving a digital disaster broadcast which is transmitted through a plurality of transmission medium is provided to automatically search other channels and inform channel having failure corresponding to institution, thereby rapidly grasping the failure of a system for digital disaster broadcasting. CONSTITUTION: At least two or more digital disaster broadcasting message receivers(821~824) receives digital disaster broadcasting messages which are transmitted through at least two or more transmitting units. A digital disaster broadcasting message extractor(825) extracts a message divider from the digital disaster broadcasting message received through the digital disaster broadcasting message receiver. A control unit(841) inspects overlapping receiving by comparison of the received message divider.

Description

Apparatus and method for receiving digital emergency warning broadcasting message transmitted through a plurality of transmission media

The present invention relates to an apparatus and method for receiving a digital disaster broadcast transmitted through a plurality of transmission media, and more particularly, to a device for receiving a digital disaster broadcast notification signal included in a digital multimedia broadcasting (DMB) broadcast signal and transmitted. If the channel does not receive the digital disaster announcement signal for a certain period of time, it automatically searches for another channel and automatically switches the channel to receive the digital disaster announcement signal. An apparatus and method for digital disaster broadcast reception transmitted through a plurality of transmission media for reporting to an institution.

As digital broadcasting has been put into practical use, various methods for delivering various information to users as well as multimedia contents corresponding to conventional TV or radio broadcasting programs have been considered. In particular, methods and transmission protocols that can inform digital viewers of digital disaster broadcasting by using digital broadcasting for the purpose of public interest are being researched and supplemented.

1 is a block diagram of a digital disaster broadcasting apparatus according to the prior art,

2 is a block diagram of a digital disaster broadcast reception apparatus according to the prior art.

9 (a) is a protocol stack of T-DMB, and 9 (b) is an exemplary format of digital disaster broadcast service data.

10 is an exemplary configuration diagram of a digital disaster broadcasting system according to the prior art.

The digital disaster broadcasting system according to the prior art receives a digital disaster broadcasting service from a broadcast signal according to a digital emergency broadcasting service (Emergency Warning Service) according to the transmission protocol of digital broadcasting, and receives the received digital disaster broadcasting according to the corresponding transmission protocol. It is configured to be expressed.

The digital disaster broadcast service may include, for example, digital disaster broadcast data and digital disaster broadcast additional information. That is, simple data information can be provided as digital disaster broadcasting data, but large data such as moving picture data or audio data can be provided separately from the data. Hereinafter, it is assumed that the digital disaster broadcasting service includes digital disaster broadcasting data and digital disaster broadcasting additional information.

The apparatus for receiving a digital disaster broadcast service includes not only a general digital broadcast receiver but also a dedicated terminal for receiving a digital disaster broadcast.

In addition, digital broadcasting may include, for example, terrestrial digital broadcasting, cable or satellite digital broadcasting, IPTV broadcasting using a communication network, terrestrial digital multimedia broadcasting (T-DMB) or satellite digital multimedia broadcasting (S-DMB). ) May include a broadcast service.

In particular, the case of performing a digital disaster broadcasting service using terrestrial digital multimedia broadcasting (T-DMB) will be described in more detail.

Domestic T-DMB standard defines ensemble, service, service component to express service model. "Ensemble" is a basic unit that is modulated by RF and transmitted. One ensemble may include several services. "Service" means a unit that a receiver can select and watch. A service may consist of one or more "service components". One service component transmits on one transport channel.

A service component refers to an element constituting a service in terms of a service model, and a transport channel refers to a set of transport protocols used to transmit a service component in terms of a protocol.

9 (a) is a diagram illustrating a protocol stack of a conventional T-DMB. The T-DMB transport channel is largely divided into a FIC (Fast Information Channel) and an MSC (Main Service Channel).

FIC transmits multiplex configuration information (MCI) for signaling of T-DMB services, and FIC provides high level of transmission error protection without time interleaving to receive MCI quickly and securely. Apply.

In general, since the capacity allocated to the FIC is limited, the MCI is transmitted first, and then the system information (SI) is transmitted using the FIC.

The Fast Information Data Channel (FIDC) may be used for paging, TMC (Traffic Message Channel) or EWS (Emergency Warning Systems) transmission within the FIC. FIDC is a transmission channel for specialized receivers or simple mobile receivers that offer relatively low data rates but where power consumption can be an important issue.

MSC is composed of Audio Stream Mode, Network Level Packet Mode, and Data Stream Mode, and in each mode, Transparent Data Channel (TDC) and Data Linked (DLS). The service component is transmitted using a service, IP tunneling, multimedia object transfer (MOT), MPEG4 data, and the like.

In the conventional T-DMB, service signaling is to transmit information about a service, a service component, a service component, and a transport channel relationship in order to receive multiplexed data, that is, a service included in the DMB data. .

For such service signaling, MCI included in the aforementioned fast information channel is used.

Particularly in T-DMB, the relationship between a service component and a transport channel for the same is as follows.

The MCI is transmitted using FIG (Fast Information Group) type 0.

In MCI, the relationship between ensemble and service, service to service component, service component to subchannel in stream mode, service component to service component Id in packet mode, and service component in FIDC Information such as the relation between the subchannel and the information subchannel and the capacity unit (CU). The subchannel is a basic transmission unit of the MSC, and one subchannel includes a plurality of CUs.

On the other hand, unlike the general DMB service, the digital disaster broadcasting service cannot predict the service start time due to the characteristics of the service. In other words, the digital disaster broadcasting service is only started when the digital disaster broadcasting is issued by the digital disaster broadcasting issuing agency, such as the disaster prevention agency or the local government's disaster management organization, and the service is not normally provided to viewers.

However, until now, digital disaster broadcasting is carried out using only one broadcasting channel. If a digital disaster broadcasting is not properly broadcasted due to a failure of the corresponding broadcasting station or other reasons, the disaster cannot be received because of the data channel. There is a problem that can not provide disaster information smoothly to people in the disaster area when the situation occurs.

In addition, all the technologies developed to date assume that digital disaster broadcasting is transmitted through one channel. In order to solve the above problems, when a digital disaster broadcast can be transmitted on various channels, there are no technical considerations on how the receiver can receive it.

The present invention has been proposed to solve the above problems, assuming that digital disaster broadcasting is transmitted to several channels in order to solve a problem that may occur when only one channel is being transmitted. Receive digital disaster broadcasts transmitted through multiple transmission media that can automatically search for other channels when digital digital disaster broadcasts are not received on a particular channel being used and can notify organizations that manage digital disaster broadcasts of failed channels. An apparatus and method are provided.

Also, digital disaster broadcast reception transmitted through a plurality of transmission media capable of frequently diagnosing a digital disaster broadcast reception device transmitted through a plurality of transmission media and notifying an institution managing the digital disaster broadcast reception device of diagnosis status information. An apparatus and method are provided.

Digital disaster broadcast receiving apparatus transmitted through a plurality of transmission media according to an embodiment of the present invention for achieving the above object is an RF receiver for receiving a radio signal of the first channel of the high-frequency radio signal transmitted through the broadcast network ;

A demodulator for demodulating a broadcast signal from the received high frequency radio signal of the first channel;

A digital disaster broadcast identification unit for identifying whether a digital disaster broadcast notification signal is included in the demodulated first channel broadcast signal, and fails to receive digital disaster broadcast notification signal identification information from the broadcast signal of the first channel for a predetermined time. A control unit which generates a bad reception signal and controls the RF receiver to receive a broadcast signal of another channel;

A CDMA modulator for CDMA modulating the reception bad signal; And

And an RF transmitter for transmitting the CDMA modulated signal to a CDMA base station.

Meanwhile, the digital disaster broadcast identification unit determines whether there is a predefined digital disaster broadcast data in a fast information chanel (FIC) channel or a fast information data channel (FIDC) channel among the demodulated first channel broadcast signals. The apparatus further includes a channel decoder for identifying whether or not is included, wherein the digital disaster broadcast data transmitted through the FIDC channel is a FIG. 5 (Fast Information Group) type (5) extension. The data includes digital disaster broadcast validity data indicating whether the digital disaster broadcast service is valid and digital disaster broadcast data of the digital disaster broadcast service when the digital disaster broadcast service is valid, and when the digital disaster broadcast data is not valid. Including predefined padding It shall be.

In addition, when the digital disaster broadcast notification signal identification information is not received from the broadcast signal of the first channel, the digital disaster broadcast notification from the broadcast signal of the first channel after the timer driven by the control of the controller and the timer is driven. When the signal identification information is received within a predetermined time, the timer is initialized, and when the digital disaster broadcast notification signal identification information is not received from the broadcast signal of the first channel for a predetermined time, the first channel is controlled by the control unit. An RF channel selector may be further included to tune the RF receiver to sequentially receive broadcast signals transmitted from other channels.

On the other hand, the receiver further comprises a receiver status monitoring unit for monitoring the status of the digital disaster broadcast receiver to generate a receiver diagnostic signal,

And receiving the CDMA modulation signal from the CDMA modulator by the receiving device diagnostic signal generated by the receiving device state monitoring unit and transmitting the CDMA modulated signal to the CDMA base station through the RF transmitting unit. The wireless broadcast signal received by the RF receiver or a wired data signal from an external device connected to the digital disaster broadcast receiver, a signal indicating an internal temperature of the receiver, a door open state or a power failure, or the receiver diagnostic signal is And a signal indicating a test result of a speaker connected to the receiver, a test result of an amplifier, or a battery test result.

Digital disaster broadcast receiving method transmitted through a plurality of transmission media according to an embodiment of the present invention for achieving the above object is to receive a radio signal of the first channel of the high-frequency radio signal transmitted through the broadcasting network from the RF receiver Receiving;

Demodulating a broadcast signal from the received high frequency radio signal of the first channel by a demodulator;

Identifying whether a digital disaster broadcast notification signal is included in the demodulated first channel broadcast signal by a digital disaster broadcast identification unit;

Generating a bad reception signal and controlling the RF receiver to receive a broadcast signal of another channel when the controller fails to receive digital disaster broadcast notification signal identification information from the broadcast signal of the first channel for a predetermined time;

CDMA modulating the reception bad signal in a CDMA modulator; And

And transmitting the CDMA modulated signal to a CDMA base station by an RF transmitter.

The channel decoder determines whether there is a predefined digital disaster broadcast data in a fast information chanel (FIC) channel or a fast information data channel (FIDC) channel among the demodulated first channel broadcast signals, and includes a digital disaster broadcast notification signal. The method may further include identifying whether the digital disaster broadcast data transmitted through the FIDC channel is a fast information group (FIG) type 5 extension.

The digital disaster broadcast data includes digital disaster broadcast validity data indicating whether the digital disaster broadcast service is valid, and digital disaster broadcast data of the digital disaster broadcast service when the digital disaster broadcast service is valid, and the digital disaster broadcast data If is not valid, characterized in that it includes a predefined padding (padding).

In addition, when the digital disaster broadcast notification signal identification information is not received from the broadcast signal of the first channel, after the timer is driven and after the timer is driven by the control of the controller, after the timer is driven, Initializing the timer and receiving the digital disaster broadcast notification signal identification information from the broadcast signal of the first channel for a predetermined time when receiving the digital disaster broadcast notification signal identification information from the broadcast signal for a predetermined time; And tuning the RF receiver to sequentially receive broadcast signals transmitted from channels other than the first channel under the control of the controller, and from the RF receiver, transmitted from channels other than the first channel. When digital disaster information notification signal identification information is received from a broadcast signal , It may be further included the step in which the timer is reset.

On the other hand, the receiving device status monitoring unit for monitoring the status of the digital disaster broadcast receiving device to generate a receiving device diagnostic signal;

CDMA modulating the receiver diagnostic signal in a CDMA modulator; And

The RF transmitter may further include transmitting the CDMA modulated receiver diagnostic signal, wherein the receiver diagnostic signal is connected to a wireless broadcast signal received by an RF receiver or an external device connected to the digital disaster broadcast receiver. A wired data signal, a signal indicating an internal temperature of the receiving device, a door opening state or a power failure, or the receiving device diagnostic signal is a signal indicating a test result of a speaker connected to the receiving device, a test result of an amplifier, or a battery test result. It is characterized by that.

According to an aspect of the present invention, a digital disaster broadcast reception apparatus transmitted through a plurality of transmission media may include at least one of a digital disaster broadcast message transmitted through at least two transmission means. Two or more digital disaster broadcast message receivers;

A digital disaster broadcast message extractor for extracting a message identifier from the digital disaster broadcast message received through the digital disaster broadcast message receiver; And

And a controller for checking whether the received message separator is duplicated.

On the other hand, the message separator is a serial number assigned by a digital disaster broadcasting issuer or a digital disaster broadcast issuer, or a digital disaster broadcast message extracted when the message separator is not duplicated in a predetermined format generated by the digital disaster broadcast issuer. It outputs through the output and characterized in that discarded if duplicated.

Digital disaster broadcast reception method transmitted through a plurality of transmission media according to an embodiment of the present invention for achieving the above object is a digital disaster transmitted from at least two or more digital disaster broadcast message receiver through at least two transmission means Classifying and receiving a broadcast message;

Extracting a message separator from the received at least two digital disaster broadcast messages by a digital disaster broadcast message extractor;

Checking whether the extracted message separator is duplicated by a control unit; And discarding the digital disaster broadcast message, which is duplicated and received as a result of the inspection, and outputting the non-duplicate digital disaster broadcast message through an output unit.

The message delimiter may be a serial number assigned by a digital disaster broadcasting issuing agency or a digital disaster broadcasting issuing requesting institution or a predetermined format generated by the digital disaster broadcasting issuing agency. The at least two digital disaster broadcasting message receivers may be a terrestrial DMB receiver or a satellite DMB. It is characterized in that the selected from the receiver, the Ethernet receiver or the CDMA network receiver.

Digital disaster broadcast receiving apparatus and method transmitted through a plurality of transmission media according to the present invention having the configuration as described above to solve the problem that can occur when the digital disaster broadcast is transmitted to only one channel is digital to multiple channels Assuming that a disaster broadcast is being transmitted, if a digital disaster broadcast is not received from a specific channel being received, another channel is automatically searched and an error channel is notified to the agency managing the digital disaster broadcast system. Quickly identify failures to respond in the event of a disaster, while users in a disaster area can receive digital disaster broadcasts from multiple channels, allowing them to identify disasters, resulting in life or property damage. Prevent your back.

In addition, by automatically diagnosing the device receiving the digital disaster broadcast transmitted through a plurality of transmission media to notify the agency that manages the digital disaster broadcast receiving device diagnostic status information so that the disaster equipment is always operating normally It is possible to ensure that the digital disaster broadcasting system operates normally in case of an accident occurring suddenly.

1 is a block diagram of a digital disaster broadcasting apparatus according to the prior art.
2 is a block diagram of a digital disaster broadcast reception apparatus according to the prior art.
3 is an exemplary block diagram of a digital disaster broadcast receiving apparatus according to an embodiment of the present invention.
4 is an exemplary flowchart for reporting this to a higher authority when the digital disaster broadcast is not received in the digital disaster broadcast reception method according to an embodiment of the present invention.
5 is an exemplary flowchart illustrating a method for receiving a digital disaster broadcast by searching for another channel when the digital disaster broadcast is not received in the method for receiving a digital disaster broadcast according to an embodiment of the present invention.
6 is an exemplary flowchart of a digital disaster broadcast processing procedure received through a plurality of media in a digital disaster broadcast system according to another embodiment of the present invention.
7 is an exemplary configuration diagram of a digital disaster broadcast transmission and reception system according to another embodiment of the present invention.
8 is an exemplary configuration diagram of a digital disaster broadcast reception device according to another embodiment of the present invention.
9 (a) is a protocol stack of T-DMB,
9 (b) is an exemplary format of digital disaster broadcast service data.
10 is an exemplary configuration diagram of a digital disaster broadcasting system according to the prior art.

Hereinafter, an apparatus and method for digital disaster broadcast reception transmitted through a plurality of transmission media according to the present invention will be described in detail with reference to the accompanying drawings.

3 is an exemplary block diagram of a digital disaster broadcast receiving apparatus according to the present invention.

The digital disaster broadcast receiving apparatus according to the present invention notifies the Fire and Disaster Prevention Agency when the disaster occurrence information is received from an organization that generates disaster information such as the Meteorological Agency, and generates a digital disaster broadcast from the disaster prevention agency to generate a digital disaster in the DMB broadcast signal. The broadcast notification signal and the digital disaster broadcast data is inserted and converted into a high frequency radio signal and transmitted to the air through the DMB relay station 310, and the RF receiver 340 of the digital disaster broadcast receiver in the form of a general receiver or a special receiver is a high frequency radio. The RF signal is demodulated by the demodulator 351 and decoded by the channel decoder 352 to confirm the existence of the digital disaster broadcast notification signal and the digital disaster broadcast data.

In detail, the DMB receiver capable of receiving a digital disaster broadcast receives a high frequency radio signal of a first channel, that is, a DMB broadcast signal through a transmission / reception antenna 320.

The DMB broadcast signal is transmitted in a format as shown in FIG. 10, and the DMB broadcast signal may include a digital disaster broadcast notification signal.

The channel through which the digital disaster broadcast notification signal is transmitted may be a fast information channel. In particular, the fast information channel may exist within a fast information data channel, which is not a channel for transmitting MCI or SI. In this case, a fast information channel or a fast information data channel. The Fast Information Data Channel may be checked to determine whether a digital disaster broadcast notification signal exists.

When using a fast information data channel, the digital disaster broadcast notification signal may be transmitted through a fast information group (FIG) type 5 extension 2.

FIG type 5 extension 2 (FIG 5/2) includes a FIG header and FIG data.

The FIG header consists of a 1-bit FIG TYPE field (set to "101") and a length field (5 bits).

A 1-bit D2 field indicates that the digital disaster broadcasting service is not valid when "0" and the digital disaster broadcasting service is valid when "1".

When D2 = 0, FIG data includes a 1-bit D1 field (used reserved and currently set to "0"), a 1-bit D2 field ("0"), and a 3-bit TDId field ("000"). ), A 3-bit Ext field (set to "010"), and 28 bytes of padding.

When D2 = 1, that is, when the digital disaster broadcasting service is valid, digital disaster broadcast data having a maximum length of 28 bytes is inserted instead of 28 bytes of padding, and when D2 = 1, a maximum length of 28 bytes is provided. Digital disaster broadcast data may be inserted instead of padding.

As a result of confirming the digital disaster broadcast notification signal, when the digital disaster broadcast notification signal exists, the digital disaster broadcast data transmitted through the data channel is analyzed to determine whether to provide the digital disaster broadcast data.

The digital disaster broadcast data includes digital disaster broadcast validity data indicating whether the digital disaster broadcast data is valid. For example, it is possible to determine whether the digital disaster broadcast data is valid by checking the D1 field. For example, it may be determined that the digital disaster broadcast data is provided only when D1 = 1. That is, when D1 = 1, digital disaster broadcast data is inserted instead of padding, and digital disaster broadcast data can be provided by extracting and displaying the digital disaster broadcast data on the DMB receiver.

The provision of the digital disaster broadcast data can be provided independently of the image data for other services displayed on the DMB receiver, and the digital disaster broadcast data can be superimposed in the form of subtitles.

When the digital disaster broadcast notification signal or the digital disaster broadcast data is received by the digital disaster broadcast receiver 361 after being decoded by the channel decoder 352, the digital disaster broadcast receiver operates the digital controller 362 to display an image. And output digital disaster broadcasts in sound or text form.

The apparatus for outputting the digital disaster broadcasting may include a DMB image reproducing unit 381, an audio reproducing unit 383, and the like. An amplifier control unit 382, a storage data processing unit 386, and a TTS processing unit are required to drive the digital disaster broadcasting. (387), the control command processor 388 is well known in the art, and the present invention is not limited by these elements, and thus detailed descriptions thereof will be omitted.

However, the broadcast result collection unit 384 and the history management unit 385 are required to determine that the digital disaster broadcast reception device operates normally in the digital disaster broadcast reception device according to the present invention. To generate and store the output history of the digital disaster broadcast data and report it to the digital disaster broadcast management agency, for example, the National Emergency Management Agency.

The main controller 370 may include a controller 371, a timer 372, an input unit 373, and the like. The controller 371 controls the overall digital disaster broadcast receiving apparatus, and the timer 372 is a digital disaster broadcast. When the notification signal is not received, the controller 371 is driven by the controller 371 to check whether a predetermined time has elapsed.

If the digital disaster broadcast notification signal is not continuously received even after a predetermined time set in the timer 372, the DMB relay station, the digital disaster broadcast transmission agency currently in charge of the digital disaster broadcast transmission, or other reasons Since digital disaster broadcasting cannot be received, it should be confirmed to a higher authority.

In order to ensure that digital disaster broadcasting is normally transmitted even in case of emergency, the present invention is to identify a path or device in which a failure occurs so that the digital disaster broadcasting system can be normally operated. Is achieved by the digital disaster broadcast receiving device.

When the digital disaster broadcast notification signal is not received for a predetermined time as described above, the digital disaster broadcast receiver generates a signal indicating that the digital disaster broadcast is not received, and the CDMA modulator 332 modulates the CDMA signal to transmit an RF transmitter. 331 is transmitted to the CDMA base station.

The CDMA base station delivers the received CDMA modulated signal to a preset higher authority.

In addition, the digital disaster broadcast receiving apparatus may diagnose the status of each device included in the digital disaster broadcast receiving apparatus by itself or at the request of a higher authority, generate a diagnosis result, and report the result to the higher authority. The receiver state monitoring unit 333 receives the device diagnosis signal from the measuring device provided in each device and generates the received device diagnosis signal as the receiver device diagnosis signal and outputs it to the CDMA modulator 332. (331) report to higher authority.

Meanwhile, when the digital disaster broadcast notification signal is not received from the first channel for a predetermined time, the controller 371 controls the RF receiver 340 to receive a digital disaster broadcast notification signal that can be transmitted from another channel.

Specifically, when the digital disaster broadcast notification signal has not been received for a predetermined time, it is checked whether each channel includes the digital disaster broadcast notification signal by sequentially scanning channels other than the first channel according to a predetermined rule. .

As a result of the check, if a specific channel includes the digital disaster broadcast notification signal, it tunes to the channel to receive the digital disaster broadcast notification signal continuously, and the channel including the digital disaster broadcast notification signal to the higher authority and the channel not included. Generate information about and report to higher authorities.

In order to generate a rule for scanning a channel other than the first channel, the digital disaster broadcast receiver may have a separate device or algorithm.

In more detail, for example, a receiver may generate a receivable channel and scan only the receivable channel based on the location of the digital disaster broadcast reception apparatus. To this end, a location information detection unit is provided to obtain information on the location of the digital disaster broadcast reception apparatus and stores a predefined channel list as a channel through which the digital disaster broadcast notification signal is transmitted based on the location information. You can only scan for channels.

As another example, a channel for transmitting a digital disaster broadcast notification signal may be selected based on channel quality.

In detail, the received signal of the RF receiver 340 is analyzed to store only a channel having a strength greater than a reference value, a code error rate (BER), or a block error rate (BLER) as a channel through which the digital disaster broadcast notification signal is transmitted, and then the first channel of the stored channel. If a digital disaster broadcast notification signal is not received in one channel, the channel to be scanned may be selected. After selecting a channel to be scanned based on the stored channel list as described above, the RF receiver 340 is tuned to the selected channel through the RF channel selector 390.

The procedure for reporting this to a higher authority when not receiving a digital disaster broadcast will be described with reference to FIG. 4.

When the digital disaster broadcast receiving apparatus is driven, a high frequency radio signal is received through a first channel predetermined or set by a user (S410).

Then, by demodulating the received high frequency radio signal (S420) and checking whether the digital disaster broadcast notification signal is included (S430), and if the digital disaster broadcast notification signal is included, check whether it is a valid digital disaster broadcast (S440). In the case of digital disaster broadcasting, disaster data is processed (S450) and output through an output unit, that is, an audio reproducing unit or a DMB image reproducing unit (S460).

Even if it is not valid disaster data, since the digital disaster broadcast notification signal is normally received in the first channel, the digital disaster broadcast notification signal returns to the standby state for receiving the digital disaster broadcast notification signal through the first channel.

On the other hand, when the digital disaster broadcast notification signal is not received, the timer is driven by the control of the controller.

After the timer is driven, it must be checked whether a digital disaster broadcast notification signal is received through the first channel for a predetermined time (S421).

This is because the digital disaster broadcast may not be received through the first channel due to a temporary failure, and the digital disaster broadcast notification signal is normally received on the first channel after the temporary failure is recovered.

This is because the so-called ping-pong phenomenon may occur if the RF receiver is immediately tuned to another channel to receive a digital disaster broadcast notification signal from another channel even for a temporary error.

On the other hand, if the digital disaster broadcast notification signal is not received until a certain time is passed in the first channel due to a failure of the digital disaster broadcasting system rather than a temporary error, the higher authority that receives the signal reports the digital disaster broadcasting system. Thus, immediate response can be made to the failure part.

To this end, if a digital disaster broadcast notification signal is not received from the first channel until a predetermined time has elapsed after driving the timer, a signal indicating a reception failure is generated (S422), and CDMA modulation (S423) is performed to the CDMA base station. Transmit (S424).

Meanwhile, the present invention periodically checks the digital disaster broadcast receiver so that the status of the digital disaster broadcast receiver can be grasped by a higher authority.

In more detail, according to a request of a higher authority or a built-in algorithm of itself, the state of each component of the digital disaster broadcast receiving apparatus is diagnosed (S470), a result signal is generated in the diagnosed state (S471), and CDMA modulation is performed (S423). In step S424, the CDMA modulated signal is transmitted to the CDMA base station.

An example of diagnosing the digital disaster broadcast receiving apparatus may be measuring a state of a wireless and wired communication line. For example, the digital disaster broadcasting transmitter may transmit a test signal to check whether the digital disaster broadcasting transmitter and the digital disaster broadcast receiver operate normally, and the digital disaster broadcast receiver receives the test signal as described above. In this case, it is possible to record whether the digital disaster broadcasting data is output or not and report it to the digital disaster broadcasting transmission institution through the CDMA network.

On the other hand, the wired line may also send a test signal such as a wireless network to check the state of the line, and receive it from the digital disaster broadcasting receiver so as to report the CDMA network.

On the other hand, the result of checking the internal state of the system can be used as a diagnostic signal. The internal state of the system may be, for example, a temperature inside the digital disaster broadcast receiver, a door open state, or an AC or DC power state of the digital disaster broadcast receiver.

On the other hand, the diagnosis signal may be a speaker state, an amplifier state, a battery state, and a state of peripheral devices included in the digital disaster broadcast receiver.

If the digital disaster broadcast notification signal is not received until a certain time passes on the first channel, the digital disaster broadcast reception device should immediately receive the digital disaster broadcast notification signal that can be transmitted from another channel. Explain.

Receives a high frequency radio signal from the first channel, demodulates and decodes a high frequency radio signal as shown in FIG. 4 to decode a sync, FIC or FIDC signal that can be transmitted with a digital disaster broadcast notification signal. If the digital disaster broadcast notification signal is included, the digital disaster broadcast data is processed.

On the other hand, if the digital disaster broadcast notification signal is not included, start the timer and check whether the digital disaster broadcast notification signal is received from the first channel for a certain period of time. When the digital disaster broadcast notification signal is not received from the first channel, it is necessary to sequentially check whether the digital disaster broadcast notification signal is immediately received through a channel other than the first channel.

This is achieved by sequentially tuning the RF receiver to channels other than the first channel to receive, demodulate and channel decode the radio frequency radio signals of channels other than the first channel.

In the present invention, when a digital disaster broadcast notification signal is not received in a specific channel, the digital disaster broadcast notification signal that can be transmitted in another channel is received, and in order to sequentially scan other channels, a channel list generated in a separate rule. Can be scanned based on.

FIG. 5 is an exemplary flowchart illustrating a method of searching for another channel and receiving a digital disaster broadcast when the digital disaster broadcast is not received in the method of receiving a digital disaster broadcast according to an embodiment of the present invention. First, a digital disaster broadcast notification signal is received by tuning the RF receiver of the digital disaster broadcast reception apparatus to a channel preset or selected by the user (S510). The presence or absence of the digital disaster broadcast notification signal can be confirmed by examining whether the predetermined information is included by decoding one of the synchronization channel, the FIC channel or the FIDC channel as described in FIG. 3.

As a result of the review (S530), if the disaster alert notification signal is included, if the digital disaster broadcast notification signal is not received for a predetermined time, the timer for setting a reference time for reporting this to a higher authority is initialized (S540), and the digital disaster broadcast data The digital disaster broadcast data is received and processed (S550). Processing the digital disaster broadcast data may be output as an image, output as sound, or display of a text message.

On the other hand, if the review result (S530), the disaster alert notification signal is not included if the disaster alert notification signal is not received for a predetermined time to drive a timer to report it to the higher authority (S531). After the timer is driven, the receiver continuously receives broadcast data through the RF receiver to determine whether a disaster alert notification signal is included. If a disaster alert notification signal is not received even after a predetermined time (S532), a disaster alert notification is given to a higher authority. A message indicating that a signal is not received is generated and transmitted to a higher authority, and the digital disaster broadcast receiving apparatus checks whether a disaster alert notification signal is received from another channel.

In more detail, the controller scans the RF channel selector according to a rule for scanning channels other than the first channel in advance as described in the description of FIG. 4 (S533). The scanning of the channel may include receiving an RF signal and checking whether the received RF signal includes a digital disaster broadcast notification signal. If the digital disaster broadcast notification signal is included as a result of the scan, then the disaster alert data is received in a channel including the digital disaster broadcast notification signal (S534).

6 is an exemplary flowchart of a digital disaster broadcast processing procedure received through a plurality of media in a digital disaster broadcast system according to another embodiment of the present invention.

6 to 8 relate to receiving and processing a digital disaster broadcast message when it is transmitted through a plurality of media.

First, referring to FIG. 6, digital disaster broadcast messages transmitted through the broadcasting network are transmitted not only through the terrestrial DMB networks 622 and 632 but also through the satellite DMB networks 621 and 631 as compared with FIG. 10. There is a difference in transmission over 624 and 634 and CDMA networks 623 and 633.

The format of a basic digital disaster broadcast message follows a format defined in each medium, but a message received duplicately by distinguishing whether or not a plurality of digital disaster broadcast messages transmitted through the plurality of media are duplicated by a digital disaster broadcast reception device is initially received. Only broadcast messages.

For example, when a digital disaster broadcast message is first received through the terrestrial DMB networks 622 and 632, the satellite DMB network 621 and 631, the CDMA network 623 and 633, or the Ethernet network 624 and 634 are received. If the same digital disaster broadcast message is received, only the digital disaster broadcast message received through the terrestrial DMB networks 622 and 632 is digitally disaster-broadcasted through the output means, and then the satellite DMB networks 621 and 631 and the CDMA network ( The digital disaster broadcast message received through the 623 or 633 or the Ethernet network 624 and 634 is determined as a duplicate so as not to be a digital disaster broadcast.

To this end, even if the digital disaster broadcast message transmitted through each medium is transmitted according to a format defined in the medium, the same digital disaster broadcast message may have a delimiter to guarantee identity. For example, a unique serial number is assigned to each digital disaster broadcast message, so that the digital disaster broadcast reception device can verify the identity of the message transmitted through each medium by checking the serial number included in the message. Accordingly, when a digital disaster broadcast message having the same serial number is received, only the first received digital disaster broadcast message is output, and subsequent messages having the same serial number are not output.

Although the serial number is presented as an example as a means for checking whether the digital disaster broadcast message is the same, the present invention is not limited to the serial number, but a separator capable of distinguishing the identity in the digital disaster broadcast message format is sufficient. And since it can be modified in various forms it will be apparent to those skilled in the art that specific examples thereof will be omitted.

7 is a flowchart illustrating a process of checking whether a digital disaster broadcast message is transmitted through a plurality of media according to another embodiment of the present invention.

First, a process of receiving a digital disaster broadcast message through a terrestrial DMB network will be described. When the digital disaster broadcast receiver according to the present invention is driven, the terrestrial digital disaster broadcast channel is searched first (S711). If the channel search is successful (S712), the digital disaster broadcast message is received (S713), and the digital disaster broadcast message is extracted (S714). Thereafter, it is checked whether the same digital disaster broadcast message previously transmitted through another medium exists (S740). If it is not a duplicate message, it is checked whether the correct digital disaster broadcast message is correct (750). If a broadcast message is transmitted (S751), and if it is not a valid digital disaster broadcast message, it is checked whether it is a control message (S760), if it is a control message, a control command is processed (S761), and if it is not a control message, the received message is discarded ( S770).

Meanwhile, when receiving the digital disaster broadcast message, if the digital disaster broadcast message is not received for a predetermined time, reporting the same through the CDMA network is the same as that of FIG. 4, and thus the detailed description thereof will be omitted.

Receiving a digital disaster broadcast message through a satellite DMB network is the same as receiving a digital disaster broadcast message through a terrestrial DMB network. However, extracting a digital disaster broadcast message is achieved by decoding a unique format of each medium. There is a difference.

On the other hand, the process of receiving a digital disaster broadcast message through a CDMA network and an Ethernet network is also the same as receiving a digital disaster broadcast message through the terrestrial or satellite DMB network, except that the media and message have different formats. Therefore, a detailed description of the digital disaster broadcast reception process will be omitted.

On the other hand, the process after receiving the digital disaster broadcast message through the satellite, Ethernet network or CDMA network as described above is the process of receiving the digital disaster broadcast message through the above-mentioned terrestrial DMB network to check whether the message is duplicated Is the same as

In addition, since Ethernet network or CDMA network uses only one channel, it is not necessary to search for multiple channels. However, if a digital disaster broadcast message is not received for a certain time, it can be reported to a higher authority. The same process as for reporting when there is a bad reception in the terrestrial or satellite DMB network described above.

FIG. 8 is an exemplary configuration diagram of a digital disaster broadcast receiver according to another embodiment of the present invention, which is the same as the configuration of the digital disaster broadcast receiver of FIG. 3 except that the digital disaster broadcast receiver of FIG. A terrestrial DMB receiver 822, a satellite DMB receiver 823, an Ethernet receiver 824, and a CDMA network receiver 821 are provided to enable disaster broadcast reception.

Hereinafter, a detailed description of the configuration overlapping with that of FIG. 3 will be omitted, and a description will be given based on the newly added configuration in FIG. 8.

The apparatus for receiving a digital disaster broadcast according to FIG. 8 may further include the plurality of media receivers 821, 822, 823, and 824 to receive a digital disaster broadcast message transmitted for each medium. Do not broadcast digital disasters, only output the first digital disaster broadcast message.

Specifically, the digital disaster broadcast message received through each of the media receivers 821, 822, 823, and 824 is extracted by the digital disaster broadcast message extractor 825, inputted to the controller 841, and the controller 841 is the above. The digital disaster broadcast message separator included in the digital disaster broadcast message received through each media receiver is searched to check whether a digital disaster broadcast message having the same identifier is received in the previously received digital disaster broadcast message, and then check whether there is a duplicate. .

The separator may be, for example, a digital disaster broadcasting message serial number generated by a digital disaster broadcasting agency (eg, firefighting and disaster prevention agency) or a disaster issuing requesting body (eg, police police, local government, etc.), or When a digital disaster broadcast message is generated by a digital disaster broadcast issuing agency, the message header may be defined in a predetermined format.

If the digital disaster broadcast message is first received as a result of the inspection of the controller 841, the controller 841 outputs the digital disaster broadcast message of the digital disaster broadcast message extractor through the digital controller 850 through an audio or video device. .

310: DMB relay station 320: transmit and receive antenna
330: transmitter 340: RF receiver
350: baseband processing unit 351: demodulation unit
352: channel decoder 360: digital disaster broadcast processor
361: digital disaster broadcast receiver 362: digital controller
370: main controller 371: control unit
372: timer 373: input unit
380: digital disaster broadcast output unit 381: DMB video playback unit
382: amplifier control section 383: audio playback section
384: broadcast result collection unit 385: history management unit
386: stored data processor 387: TTS processor
388: control command processor 390: RF channel selector
610: digital disaster broadcasting agency 621: satellite DMB broadcasting agency
622 terrestrial DMB broadcasting agency 623 CDMA network broadcasting institution
624: Ethernet Broadcasting Agency 631: Satellite DMB Repeater
632: Terrestrial DMB Repeater 633: CDMA Repeater
634: Ethernet Repeater 640: General Receiver
650: special receiver 651: RF receiver
811: RF receiver 812: Ethernet receiver
821: CDMA digital disaster broadcast receiver
822 terrestrial DMB digital disaster broadcast receiver
823: satellite DMB digital disaster broadcasting system
824: Ethernet disaster broadcast receiver
825: digital disaster broadcast message extractor 826: RF channel selector
1010: Digital Disaster Broadcasting Authority 1011: Meteorological Agency server
1012: National Emergency Management Agency Server 1013: Local Government Server
1014: digital disaster broadcasting server 1015: related agency server
1020: digital disaster broadcasting agency 1021: mobile carrier server
1022 broadcaster server 1030 general receiver
1040: special receiver

Claims (7)

In the digital disaster broadcast receiving apparatus transmitted through a plurality of transmission media,
At least two digital disaster broadcast message receivers for distinguishing and receiving a digital disaster broadcast message transmitted through at least two transmission means;
A digital disaster broadcast message extractor for extracting a message identifier from the digital disaster broadcast message received through the digital disaster broadcast message receiver; And
And a controller for comparing the received message delimiters and checking whether the received message is duplicated. The method of claim 1,
The message separator is a serial number assigned by a digital disaster broadcasting commanding agency or a digital disaster broadcasting command requesting institution or a predetermined format generated by the digital disaster broadcasting commanding agency. . The method of claim 1,
A result of comparing the message delimiter,
If not duplicated, the extracted digital disaster broadcast message is output through the output unit,
And a duplicate digital disaster broadcast message transmitted through a plurality of transmission media, wherein the extracted digital disaster broadcast message is discarded. The method of claim 1,
And the at least two digital disaster broadcast message receivers are selected from a terrestrial DMB receiver, a satellite DMB receiver, an Ethernet receiver, or a CDMA network receiver. In the digital disaster broadcast receiving method transmitted through a plurality of transmission media,
Distinguishing and receiving a digital disaster broadcast message transmitted through at least two transmission means by at least two or more digital disaster broadcast message receivers;
Extracting a message separator from the received at least two digital disaster broadcast messages by a digital disaster broadcast message extractor;
Checking whether the extracted message separator is duplicated by a control unit; And
Discarding the digital disaster broadcast message received duplicated as a result of the check, and outputting the non-overlapping digital disaster broadcast message through the output unit, digital disaster broadcast receiving method which is transmitted through a plurality of transmission media. The method of claim 5,
The message separator is a serial number assigned by a digital disaster broadcasting commanding agency or a digital disaster broadcasting command requesting institution or a predetermined format generated by the digital disaster broadcasting commanding agency. . The method of claim 5,
And the at least two digital disaster broadcast message receivers are selected from a terrestrial DMB receiver, a satellite DMB receiver, an Ethernet receiver, or a CDMA network receiver.

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