KR20150088485A - Method and system of early alerting of disaster using broadcasting system - Google Patents

Abstract

Provided are a method and a system for disaster early warning using a broadcasting system which include the steps of: receiving a common alerting protocol (CAP) message of disaster early analysis information from a disaster early warning system, adding an automatic recognition signal to the CAP message for a broadcasting signal of a broadcasting system and awakening, and broadcasting the added signal.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and system for early warning of a disaster using a broadcasting system,

The present invention relates to an early warning method and system for intervention between an early warning system for disasters such as an earthquake and an automatic anomaly warning system.

At present, studies on early warning systems for disasters are underway, including the establishment of a basic plan for upgrading disaster response systems at the national level. In recent years, an early warning system has been developed that can dramatically shorten the initial version of disaster early analysis algorithms and breakdown and notification times. Through the early warning system developed in this way, disaster messages related to the occurrence of disasters are being transmitted through various media.

However, since different standards or protocols are used for each delivery medium of a disaster message, it is difficult to maintain and repair the system when a new delivery medium is added or a standard or kind of message is changed.

In addition, when the delivery of a disaster message is through a broadcasting network, it is provided only in a form of a simple breaking news, and a disaster message can not be provided when the broadcasting is not watched. When a disaster message is delivered through a Terrestrial Digital Media Broadcasting (T-DMB) system, a disaster message is delivered through an emergency information data channel included in the T-DMB channel, There is a disadvantage in that a disaster message can be delivered only to the person watching the T-DMB.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide an early alarm method and system capable of quickly alerting a disaster as soon as it is recognized through interoperation of an automatic T-DMB service and an early warning system.

According to one aspect of the present invention, an early warning method of a disaster using a broadcasting system is provided. The early warning method includes receiving CAP message of early disaster analysis information from an early warning system of the disaster, generating a disaster message by converting a CAP message into a transmission frame, and automatically generating a disaster message for wake- Adding the broadcast signal of the broadcast signal and the broadcast signal, and broadcasting the broadcast signal and the disaster message to which the automatic acknowledgment signal is added.

In the early warning method, the CAP message may be a CAP formatted message.

The step of generating a disaster message in the early warning method includes extracting disaster information in a CAP message, converting disaster information into a transmission frame, and encoding and multiplexing a transmission frame to generate a disaster message can do.

The converting step in the early warning method may include generating a first packet by attaching meta data describing the content and the size of the disaster information to the packet of the disaster information.

In the early warning method, the metadata may include a first field including information on channel switching to the broadcasting system and a second field indicating the length of the metadata.

In the early warning method, the metadata includes a total number of bits of the metadata and a Reserved for future use (Rfu) bit for aligning the number of bits of each field included in the metadata in 8-bit units .

The converting step in the early warning method may further include dividing the first packet into a plurality of payloads.

The converting step in the early warning method may further include generating a second packet by attaching the segmentation-related information and the multiplexing-related information to the first packet segmented.

The converting step in the early warning method may further include generating a transmission frame by attaching information related to transmission to a second packet.

The adding in the early warning method may include generating a first signal by adding an automatic acknowledge signal to a disaster message, and adding a broadcast signal to the first signal to generate a second signal.

According to another embodiment of the present invention, an early warning system for a disaster using a broadcasting system is provided. The early warning system comprises a link module for receiving a CAP message of early warning of disaster information from an early warning system of a disaster, adding an automatic acknowledgment signal for recognition to a CAP message to generate a first signal, And an ESU for generating a second signal by adding the broadcast signal of the second channel.

In the early warning system, the CAP message may be a CAP formatted message.

In the early warning system, the linking module includes a CAP parser for parsing a CAP message and extracting disaster information from a CAP message, an ESDU for converting a disaster information into a transmission frame, and encoding and multiplexing a transmission frame to generate a disaster message .

In the early warning system, the ESDU may attach a metadata packet describing the content and size of the disaster information to a packet of the disaster information to generate a first packet, and divide the first packet into a plurality of payloads.

In the early warning system, the metadata may include a first field including information on channel switching to a broadcasting system and a second field indicating a length of the metadata.

In the early warning system, the metadata may include Rfu bits for matching the total number of bits of the metadata and the number of bits of each field included in the metadata in 8-bit units.

In the early warning system, the ESDU may generate the second packet by attaching the segmentation-related information and the multiplexing-related information to the first packet.

In the early warning system, the ESDU may attach transmission-related information to a second packet to generate a transmission frame.

According to one embodiment of the present invention, early warning disaster analysis information of an early warning system of an accident is displayed in an automatic anomaly disaster broadcasting system through interlocking of an early warning system of disaster such as an earthquake and an automatic disaster broadcasting system, The receiver can automatically recognize the occurrence of the disaster and quickly notify the disaster information.

FIG. 1 is a diagram illustrating an automatic disaster warning / early warning system according to an embodiment of the present invention.
2 is a diagram illustrating an automatic perceived disaster broadcasting system according to an embodiment of the present invention.
3 is a diagram illustrating a CAP message according to an embodiment of the present invention.
4 is a diagram illustrating pre-conversion earthquake early analysis information according to an embodiment of the present invention.
5 is a diagram illustrating a CAP message parsed in an association module according to an embodiment of the present invention.
6 is a diagram illustrating a frame of a disaster message according to an exemplary embodiment of the present invention.
FIG. 7 is a diagram illustrating textual disaster broadcast information according to an embodiment of the present invention. Referring to FIG.
8 is a diagram illustrating disaster broadcast information in the form of an image according to an embodiment of the present invention.
FIG. 9 is a diagram illustrating metadata attached to a disaster broadcasting service layer according to an exemplary embodiment of the present invention. Referring to FIG.
10 is a diagram illustrating a packet header attached to a service packet layer according to an embodiment of the present invention.
11 is a diagram illustrating transmission headers to be added in a transmission frame layer according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms "part," "unit," "unit," "module," "block," and the like are used in the description to mean at least one unit for processing a function or an operation, Or a combination of software and hardware.

FIG. 1 is a diagram illustrating an automatic disaster warning / early warning system according to an embodiment of the present invention.

Referring to FIG. 1, an automatic disaster warning / early warning system according to an embodiment of the present invention includes an earthquake early detection system 100, an earthquake early warning system 200, and an automatic perception / disaster broadcasting system 300 . In the following description, a case where an automatic disaster warning / early warning system according to an embodiment of the present invention recognizes and alerts an earthquake will be described. However, another embodiment of the present invention can be applied to not only earthquakes but also other types of natural disasters.

The early seismic analysis system 100 analyzes the seismic information (origin, epicenter, size, etc.) when an earthquake occurs, generates arrival prediction information of the seismic data, and obtains seismic information and arrival forecast information (Hereinafter referred to as 'early disaster analysis information') to the earthquake early warning system 200. At this time, the early earthquake early analysis system 100 can obtain earthquake information and generate strong-wave arrival forecast information by using the difference in the propagation speed of the P wave and the S wave.

The earthquake early warning system (200) converts the earthquake early analysis information into a standard protocol and delivers it to the automatic perception disaster broadcasting system (300). At this time, the earthquake early warning system 200 can convert the earthquake early analysis information into a Common Alerting Protocol (CAP) format, which is one of standardized extensible markup language (XML) protocols. The earthquake early warning system 200 transmits the earthquake early analysis information (hereinafter referred to as 'CAP message') converted into the CAP format to a socket through a security network such as a firewall and a virtual private network To the automatic acknowledgment disaster broadcasting system 300 in the form of a communication.

The automatic perceived disaster broadcasting system 300 adds a T-DMB signal and an automatic acknowledgment signal for wake-up to the received CAP message and broadcasts the signal through an antenna.

2 is a diagram illustrating an automatic perceived disaster broadcasting system according to an embodiment of the present invention.

2, an automatic perceived disaster broadcasting system 300 according to an exemplary embodiment of the present invention includes a legacy T-DMB system 310, an association module 320, an emergency transmission data unit (ETDU) ) 330, and an emergency signal unit (ESU) 340.

The association module 320 may relay the message between the legacy T-DMB system 310 and the earthquake early warning system. That is, the linking module 320 may convert the CAP message received from the earthquake early warning system into a CAP message conforming to the message format of the legacy T-DMB system 310. That is, in the present invention, the CAP message including the earthquake information (or disaster information) may be transmitted together with the broadcast message of the legacy T-DMB system 310.

First, the CAP parser 321 of the linking module 320 receives the CAP message from the earthquake early warning system in the form of a socket communication over a secure network, such as a firewall or VPN. Thereafter, the CAP parser 321 parses the CAP message to extract seismic information in a form suitable for the format of the disaster message, and transmits the extracted seismic information to the emergency service data unit (ESDU) 322 .

The ESDU 322 encodes and multiplexes earthquake information and re-processes it to generate a disaster message. Then, the generated disaster message is transmitted to the ETDU 330.

The ETDU 330 adds an automatic acknowledgment signal for wake-up to the disaster message received from the ESDU 322, channel-codes, interleaves, modulates and spreads the disaster message to which the automatic acknowledgment signal is added, . At this time, since the automatic acknowledge signal is periodically transmitted, the T-DMB receiver according to the embodiment of the present invention can detect the automatic acknowledge signal and can operate the system and display a disaster message even when it is not operating.

At this time, the signal transmitted from the ETDU 330 to the ESU 340 may be a signal (IF signal) converted into an intermediate frequency (IF). Depending on the design scheme, the ETDU 330 may output a disaster message with an automatic acknowledgment signal in a radio frequency (RF) band.

The ESU 340 adds the signal received from the ETDU 330 to the T-DMB signal of the legacy T-DMB system 310. The legacy T-DMB system 310 generates an ensemble transport interface (ETI) signal through an encoding and multiplexing process, modulates an ETI signal at a T-DMB modulation unit, and generates an IF signal of a T-DMB signal The ESU 340 of the present invention adds the IF signal of the disaster message to the IF signal of the T-DMB signal.

Thereafter, the IF signal output from the ESU 340 is up-converted to an RF band through an up-converter and broadcasted through a High Power Amplifier (HPA).

According to another embodiment of the present invention, when the ETDU 330 outputs an RF signal, the ESU 340 may be located after the up converter of the legacy T-DMB system. In this case, the ESU 340 may add the RF signal of the disaster message output from the ETDU 330 to the RF signal of the ETI signal output from the up converter.

3 is a diagram illustrating a CAP message according to an embodiment of the present invention.

The CAP message of FIG. 3 is generated based on early earthquake analysis information in the earthquake early warning system, and is then transmitted to the linking module 320 in the earthquake early warning system.

Referring to FIG. 3, the CAP message includes one < alert > segment 10. The <alert> segment 10 may not include the <info> segment 20 or may include at least one <info> segment 20. The <info> segment 20 may include no <resource> segment 30 or at least one <resource> segment 30, and may also include no <area> < area > segment (40). At this time, the <alert> segment 10 must include at least one <info> segment 20 if the value of <msgType> is "Alert".

The < alert > segment 10 provides a unique identifier given to distinguish a particular message from other related messages. It also provides basic information on the message, such as the purpose, origin or status of the message. The < alert > segment 10 can be used for message acknowledgment and cancellation, and can be used alone for other system functions. Most < alert > segments 10 include at least one < info > segment 20.

The < info > segment 20 may provide a categorical and theoretical description of the main event. In addition, the <info> segment 20 can be used to describe events that may or may not occur (such that there is sufficient time to prepare), strictness (degree of effectiveness), and certainty can do. You can also provide a description of the specific response through message submission and other details (risk duration, technical parameters, contact information, etc.). A plurality of <info> segments 20 may be used to describe other parameters or provide multilingual information.

The < resource > segment 30 may provide additional references related to the < info > segment 20, such as an image or audio file.

The <area> segment 40 may describe a geographic region to which the <info> segment 20 is applied. The <area> segment (40) can provide a literal description and a coded description, but can also include descriptions expressed in surface space data according to the surface space model (polygon or circle), elevation, elevation range, standard latitude / longitude It can be provided first.

FIG. 4 is a diagram illustrating pre-conversion earthquake early analysis information according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating a CAP message parsed in an association module according to an embodiment of the present invention.

The CAP parser 321 of the linking module 320 parses the CAP message to apply the CAP message to the format of the automatic or disaster broadcast message. Referring to FIG. 5, the <alert> segment, the <info> segment, and the <area> segment of the CAP message are parsed and generated as a disaster message.

6 is a diagram illustrating a frame of a disaster message according to an exemplary embodiment of the present invention.

The earthquake information broadcast through the automatic perception disaster broadcasting system according to an embodiment of the present invention is called disaster broadcast information.

Referring to FIG. 6, the Emergency Broadcasting service layer attaches meta data and padding to a disaster broadcast information packet. That is, the disaster broadcasting service layer generates metadata including information describing the disaster broadcasting information itself, such as the content and size of the emergency broadcasting information.

The segment layer divides a packet generated by the disaster broadcasting service layer into a size suitable for transmission to generate a plurality of payloads.

A service packet layer (Service Packet Layer) attaches a packet header and a CRC bit to a plurality of payloads. At this time, the service packet layer generates packet headers in units of one payload and CRC, and attaches them to the beginning of each payload.

The Transmission Frame Layer classifies a packet header, a payload, and a CRC into one transport packet, and attaches a transport header to the beginning of each transport packet. At this time, information related to the transmission is attached to the transmission header. Thereafter, the disaster broadcast information can be broadcast through the transmission frame as shown in FIG.

The data included in the disaster broadcasting information frame may be a text format (social network service message, etc.) or an image format (ephemeris map). In FIG. 7, disaster broadcasting information in a text format according to an embodiment of the present invention is shown And FIG. 8 illustrates disaster broadcast information in the form of an image according to an embodiment of the present invention.

According to the embodiment of the present invention, the T-DMB broadcast receiver receives the disaster message frame and can receive basic information about the earthquake early warning through the metadata of the disaster message frame. The text message or image data corresponding to the description of each payload may be provided according to the service type value of the packet header.

FIG. 9 is a diagram illustrating metadata attached to a disaster broadcasting service layer according to an exemplary embodiment of the present invention. Referring to FIG.

The meta data of FIG. 9 is described in Table 1.

Field name Field size
( bit ) Meaning of field Metadata Length
(Meta Data Length) 8 Indicates the length of metadata, in bytes.
(Length after metadata field, up to 256 bytes possible) Service Label Indicator (Service Lable Indicator) One Determines whether the service label field in the metadata exists
0: Service label field does not exist
1: Service label field exists Whether the DMB channel is switched (T-DMB Channel Change Indicator) One Decides whether to switch to existing DMB broadcasting
0: Do not switch (T-DMB channel switching field does not exist)
1: Switching (T-DMB channel switching field does not exist) Emergency service availability
Service Indicator) One Determine if disaster service exists
0: Disaster service field does not exist
1: Disaster service field exists Emergency service type
Service Type) 3 0: Disaster service does not exist (ignored)
1: AEAS (Automatic Emergency Alert Service, T-DMB Disaster Alert Broadcast Service)
2: KEEW (Korean earthquake early warning, earthquake early warning service)
3-7: Define later
※ Structure of disaster service field varies according to value of disaster service type Rfu 2 Reserved for Future Use (set to 0x00) Service Lable Field Service Lable Length 6 Number of characters in the service label (name of disaster broadcasting information) (unit: 2 bytes, up to 64 characters (128 bytes)) Rfu 2 Reserved for Future Use (set to 0x00) Service Label (Service Lable) n × 16 Name of disaster broadcasting information (UTF-16_Big endian) DMB channel change field (T-DMB Channel Change Field) Linked Ensemble Channel 6 T-DMB Used for channel switching to switch to this broadcasting channel. Channel mapping depends on country-specific channel settings
※ In Korea, 0: 7A, 1: 7B, 2: 7C, 3: 8A, 4: 8B, 5: 8C, ... , 18: 13A, 19: 13B, 20: 13C, 21-63: Reserved The sub-channel designation (Linked Sub Channel) 6 To select subchannels for the selected ensemble, use the subchannels 0 to 63 of DAB standard as is Rfu 4 Reserved for Future Use (set to 0x00) Emergency service field
Service Field) Earthquake ID 20 It is represented by an earthquake number (generally, the year (4 digits integer) + serial number (6 digits integer) "), but this specification shows the 6-digit integer value of the serial number as a 20-bit binary value
For example, only "397201" is used in "2013397201" and its value can be expressed as "0110 0000 1111 1001 0001 ₍₂₎ " or "0x6 0F91" Earth equake Time 28 Indicate the time of earthquake occurrence
※ en 300 401 Use short form in Coordinated Universal Time (UTC) of v1.4.1.
※ Year MJD (17bits) + hour (5bits) + minutes (6bits) Magnitude 7 Indicate scale of earthquake
※ If the magnitude is 7.1, it is expressed as 71 -> 47 ₍₁₆₎ 100 0111 _{(2), it can} be expressed from 0 to 12.7 Rfu 2 Reserved for Future Use (set to 0x00) Latitude coarse 15 Indicate latitude value for earthquake occurrence area
※ en 300 401 Use of latituded coarse of v1.4.1.
For example, 37.24N can be expressed as -> 000 1110 1000 1100 ₍₂₎ , or 0x0E8C, and this value is converted to a decimal number by 3724 ₍₁₀₎ divided by 100 North latitude '0', south latitude '1') Longitude coarse 16 Indicate latitude value for earthquake occurrence area
※ en 300 401 v1.4.1. Longitude coarse utilization of
For example, in case of 128.20E, it can be expressed as -> 0011 0010 0001 0100 ₍₂₎ or 0x3214. Divide 12820 _(10), which is converted to decimal value, &Quot; 0 &quot; and &quot; west &quot;

Referring to Table 1, the metadata according to an exemplary embodiment of the present invention includes a metadata length field indicating a length of metadata, and includes a channel switching field and a channel switching field related to channel switching information. In addition, in the channel switching field and the disaster service field included in the meta data, the total number of bits of the meta data, the reserved for future use (Rfu) for aligning the number of bits of each field by 8 bits, Bit.

10 is a diagram illustrating a packet header attached to a service packet layer according to an embodiment of the present invention.

In Table 2, the packet header of FIG. 10 will be described.

Field name Field size ( bit ) Meaning of field Service ID
(Service ID) 8 Unique ID of the service
The receiver collects and parses the same service packet.
For disaster service, 0 ~ 7 can be fixedly assigned Service Type 3 Type of service (parser and decoder are determined according to each service type)
0: reserved
1: Text (disaster message / additional data)
2: Text (G-zip compression)
3: Audio
4: XML (Rich Text)
5: Image
6-7: reserved Service Priority 2 Fields to consider priorities when sending services
0: Unknown
1: Normal
2: Emergency
3: very urgent Service Packet Number 7 Indicates the number of the current service packet (counted from 0 to 127) Whether the packet is first packet (First Flag) One Flag indicating first packet
0: Not the first packet
1: First packet End packet
(Last Flag) One Flag indicating last packet
0: Not the last packet
1: the last packet
* If Last Flag = 1, valid data length exists only in case of last packet. Rfu 2 Reserved for Future Use (set to 0x00) Useful data length 8 Indicate the actual data length in the last packet
This field exists only when the current packet is the last packet (Last Flag = 1) (option)

A packet header according to an embodiment of the present invention includes only information related to a payload. In the service packet layer, the CRC bit value can be set by grouping the payload and the packet header. In addition, the packet header according to an embodiment of the present invention includes a service priority field and a flag indicating whether the packet is the first packet or the last packet. If the packet following the packet header is the last packet, the packet header may further include a valid data length field. The packet header also includes an Rfu bit for aligning the bits of each field in 8-bit units.

At this time, the Cyclic Redundancy Check (CRC) bit attached to the end of each payload can be determined through a CRC-16 polynomial (CCITT) and applied as an initial value.

11 is a diagram illustrating transmission headers to be added in a transmission frame layer according to an embodiment of the present invention.

Table 3 shows the transmission header of FIG.

Field name Field size ( bit ) Meaning of field Emergency indicator One A field indicating whether a disaster message exists during the current transmission frame
0: Disaster, 1: Additional data Protection level
(Protection Level) 3 Transmission-related protection level
0: Reserved
1: Reserved
2: Reserved
3: CC R = 1/2
4: Reserved
5: Reserved
6: Reserved
7: CC R = 4/5 Disaster broadcast transmission channel SF (Spreading Factor) 2 Spreading factor applied to the disaster broadcast transmission channel in which the transmission packet is transmitted
0: Reserved
1: Reserved
2: SF = 128
3: Reserved Rfu 2 Reserved for Future Use (set to 0x00) Service Number 8 Number of services currently being sent
Up to 256 services available Rfu 8 Reserved for Future Use (set to 0x00) Transport header CRC 8 CRC-8 (polynomial: x8 + x2 + x + 1, initial value: 0x00)
※ Apply CRC value limited to transmission header (from disaster to Rfu field)

In the embodiment of the present invention, the service number field included in the transmission header indicates the number of services information equal to the number of services included in the service ID field of the packet header. The transport header may include at least two Rfu fields for aligning the bits of each field in 8-bit units.

As described above, according to the embodiment of the present invention, earthquake early warning information of an earthquake early warning system is received and displayed in an existing automatic disaster alarm broadcasting system through interlocking of an earthquake early warning system and an automatic disaster alarm system, The broadcast receiver automatically recognizes the occurrence of the earthquake and can provide the earthquake information.

In the present invention, an earthquake early detection system and an earthquake early warning system are used to inform the user of the seismic information automatically or through the T-DMB system. However, in the natural disaster early warning system and the natural disaster early warning system, It can recognize natural disasters such as tsunamis, landslides, and storms, and can broadcast recognized natural disaster information through an automatic disaster broadcasting system.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (18)

An early warning method using a broadcasting system,
Receiving a Common Alerting Protocol (CAP) message of early warning of disaster information from the early warning system;
Converting the CAP message into a transmission frame to generate a disaster message,
Adding an automatic acknowledgment signal for wake-up to the disaster message and a broadcast signal of the broadcast system; and
Broadcasting the disaster message to which the broadcast signal and the automatic acknowledgment signal are added
And an emergency alert method. The method of claim 1,
Wherein the CAP message is a message converted into the CAP format by the disaster early analysis information. The method of claim 1,
Wherein the generating the disaster message comprises:
Extracting disaster information from the CAP message,
Converting the disaster information into the transmission frame, and
Encoding and multiplexing the transmission frame to generate a disaster message
And an emergency alert method. 4. The method of claim 3,
Wherein the converting comprises:
Generating a first packet by attaching meta data describing the contents and size of the disaster information to the packet of the disaster information;
And an emergency alert method. 5. The method of claim 4,
The metadata includes:
A first field including information on channel switching to the broadcasting system, and a second field indicating a length of the metadata. 5. The method of claim 4,
The metadata includes:
And a Reserved for future use (Rfu) bit for matching the total number of bits of the metadata and the number of bits of each field included in the metadata in 8-bit units. 5. The method of claim 4,
Wherein the converting comprises:
Dividing the first packet into a plurality of payloads
Further comprising the steps of: 8. The method of claim 7,
Wherein the converting comprises:
And attaching segmentation-related information and multiplexing-related information to the divided first packet to generate a second packet
Further comprising the steps of: 9. The method of claim 8,
Wherein the converting comprises:
Adding the information related to the transmission to the second packet to generate the transmission frame
Further comprising the steps of: The method of claim 1,
Wherein the adding comprises:
Adding the automatic acknowledgment signal to the disaster message to generate a first signal, and
Adding the broadcast signal to the first signal to generate a second signal
And an emergency alert method. An early warning system using a broadcasting system,
A linkage module for receiving a Common Alerting Protocol (CAP) message of early disaster analysis information from an early warning system of the disaster, and generating a first signal by adding an automatic acknowledgment signal for wake-up to the CAP message; , And
An emergency signal unit (ESU) for adding a broadcast signal of the broadcasting system to the first signal to generate a second signal,
An early warning system for disaster. 12. The method of claim 11,
Wherein the CAP message is a message converted into the CAP format by the disaster early analysis information. The method of claim 12,
Wherein the linking module comprises:
A CAP parser for parsing the CAP message and extracting disaster information from the CAP message, and
An Emergency Service Data Unit (ESDU) for converting the disaster information into the transmission frame, encoding and multiplexing the transmission frame to generate a disaster message,
An early warning system for disaster. The method of claim 13,
The ESDU includes:
Attaching a metadata packet describing the content and the size of the disaster information to the packet of the disaster information to generate a first packet, and dividing the first packet into a plurality of payloads. The method of claim 14,
The metadata includes:
A first field including information on channel switching to the broadcasting system, and a second field indicating a length of the metadata. The method of claim 14,
The metadata includes:
And a Reserved for future use (Rfu) bit for aligning the total number of bits of the metadata and the number of bits of each field included in the metadata in 8-bit units. The method of claim 14,
The ESDU includes:
And attaching segmentation-related information and multiplexing-related information to the divided first packet to generate a second packet. The method of claim 17,
The ESDU includes:
And attaching information related to transmission to the second packet to generate the transmission frame.

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