Method for parsing and mapping emergency broadcast messages to 3gpp broadcasts

Abstract

The application proposes a method for parsing and mapping emergency broadcast messages to 3GPP broadcast, taking the emergency information adaptation device as a heterogeneous system core gateway, receiving the emergency broadcast messages conforming to the GY / T 385-2023 specification and performing validity verification, realizing accurate mapping of core fields such as message identification, level, coverage area, content, time parameter, etc. to corresponding fields of 5G multicast broadcast multimedia service, encapsulating as 5G broadcast session data according to the 3GPP TS 26.348 specification and sending to the broadcast multicast service center of the 5G core network through the standard interface. The application realizes end-to-end protocol conversion of emergency broadcast and 5G broadcast, the system is low-coupled and easy to deploy, resource utilization is efficient, and accurate and rapid delivery of emergency broadcast messages to various terminals is ensured, and the scheme has openness and interoperability.

Description

Technical Field

[0001] This invention relates to the field of emergency broadcasting technology, and in particular to a method for parsing and mapping emergency broadcast messages to 3GPP broadcasts. Background Technology

[0002] Emergency broadcasting is a crucial infrastructure for national disaster prevention, mitigation, and relief, and for ensuring public safety. Traditional emergency broadcasting primarily relies on digital terrestrial television and FM / AM broadcasting networks for information transmission. However, its long-term application has revealed several limitations: First, the one-way transmission mode makes it impossible to obtain feedback on the broadcast's effectiveness and to monitor the reach of emergency information. Second, the content of emergency information is fixed in format, mainly carrying audio and video streams, with limited ability to transmit flexible structured data, hindering deep interaction with smartphones and other smart terminals. Third, mobile reception performance is limited; digital terrestrial television and other standards perform poorly in high-speed mobile scenarios. Fourth, the service insertion method is inflexible, typically employing a "snap-in" approach, which impacts existing broadcasting services and has a low degree of automation.

[0003] With the full commercialization and in-depth development of 5G technology, its high bandwidth, low latency, and wide connectivity characteristics provide a new direction for the technological upgrade of emergency broadcasting. Building a new generation of emergency broadcasting systems using 5G technology has become an important measure to enhance national emergency management capabilities. Among these technologies, 5G terrestrial broadcasting, especially tower-based broadcasting, can achieve wide-area coverage, effectively combining the coverage advantages of broadcast networks and the interactive advantages of communication networks, providing a comprehensive solution for delivering emergency information to the "last mile." 3GPP has continuously enhanced the broadcasting capabilities of 5G in Rel-16 and subsequent versions, enabling it to efficiently distribute data to a massive number of terminals simultaneously, laying the technological foundation for the dissemination of rich media emergency information such as video, high-definition text and images, and real-time maps.

[0004] Broadcasting emergency information via 5G terrestrial broadcast networks is a significant trend in emergency broadcasting technology development and a strategic requirement for enhancing emergency response capabilities. However, the integration of these two technologies requires addressing a series of complex technical challenges across domains and protocol stacks. Existing technologies include several solutions related to 5G-based emergency broadcasting. For example, some solutions propose 5G broadcast distribution methods for emergency broadcasts, implementing basic emergency broadcast data format encapsulation, channel resource allocation, and data distribution, but lack detailed and practical designs for precise cross-system protocol mapping and heterogeneous signaling fusion. Other solutions propose using 5G-based emergency broadcast adapters in the emergency broadcasting terminal to transmit emergency information via the 5G communication network and broadcast it locally. However, these solutions do not address the core protocol conversion and mapping of 5G broadcasting and do not consider the technical characteristics of 5G broadcasting as a non-simple broadcasting system. Still other solutions achieve precise transmission of emergency broadcasts based on 5G + private security networks, but their core lies in crowd density monitoring and analysis, which is unrelated to 5G broadcasting systems and does not involve protocol mapping and conversion between emergency broadcasting and 3GPP standards.

[0005] In summary, existing technologies have failed to effectively address the integration issues of heterogeneous systems and signaling architectures between emergency broadcasting platforms and 5G broadcast networks, as well as the format adaptation and content encapsulation issues between emergency messages conforming to the GY / T 385-2023 standard and 5G broadcast IP protocol streaming media / files. Consequently, they cannot achieve efficient end-to-end integration of emergency broadcasting and 5G broadcasting, and thus cannot meet the business requirements for accurate, rapid, and reliable emergency broadcasting. Summary of the Invention

[0006] To address the aforementioned deficiencies in existing technologies, this invention provides a method for parsing and mapping emergency broadcast messages to 3GPP broadcasts. The core objective is to resolve the issues of heterogeneous system and signaling architecture integration between the emergency broadcast platform and the 5G broadcast network, as well as the format adaptation and content encapsulation of emergency messages. This achieves end-to-end protocol conversion and mapping broadcasting of emergency broadcast messages conforming to the GY / T 385-2023 specification to 5G multicast multimedia service data conforming to the 3GPP standard.

[0007] The method for parsing and mapping emergency broadcast messages to 3GPP broadcasts according to embodiments of the present invention includes: By following the first preset interface (communication interface between the emergency information platform and the emergency information adaptation device) of the broadcasting industry emergency broadcasting platform interface specification, the system receives emergency broadcast messages in EBM TAR format, which contain an Extensible Markup Language (XML) description file and optional media files, sent by the emergency information platform. The EBM TAR format emergency broadcast messages at least include a message number, a graded message level, a coverage area in the form of an administrative division code list, multiple types of message content, time parameters, and a core field of the issuing organization. The validity of the emergency broadcast message in the EBM TAR packet format is verified. After successful verification, based on the preset field mapping rule library of GY / T 385-2023 specification and 3GPP standard, the mapping of the core fields of the emergency broadcast message to the corresponding fields of 5G MBS is completed. The mapping includes: mapping the message number to the service name and session identifier of 5G MBS and generating a temporary mobile group identifier conforming to the 3GPP standard as the service identifier; mapping the hierarchical message level to the allocation and maintenance priority of the 5G system and the priority parameters of the 5G Quality of Service identifier; mapping the administrative division code list to the service area of ​​multicast broadcast multimedia service in the form of a multicast broadcast multimedia service service area identifier list; mapping the multi-type message content according to text / audio / video / additional data classification to the corresponding content fields of 5G MBS; mapping the issuing organization to the content provider identifier of 5G MBS; and mapping the time parameter to the session scheduling time parameter of 5G MBS. In the process of mapping, time zone conversion, format transcoding and encoding adaptation are completed. According to the reference point xMB interface requirements of 3GPP TS 26.348, the mapped 5G MBS field content is encapsulated into 5G broadcast session data and sent to the 5G core network broadcast multicast service center BM-SC through the second preset interface (the communication interface between the emergency information adaptation device and the broadcast multicast service center). The BM-SC then triggers the 5G broadcast session process.

[0008] This invention also provides an emergency information adaptation device, comprising: The transmission unit is used to receive emergency broadcast messages in EBM TAR format, which contain an Extensible Markup Language (XML) description file and optional media files, sent by the emergency information platform through a first preset interface that conforms to the interface specification of the broadcasting industry emergency broadcast platform. The EBM TAR format emergency broadcast message contains at least a message number, a graded message level, a coverage area in the form of an administrative division code list, multiple types of message content, time parameters, and a core field of the issuing organization. The processing unit verifies the validity of the emergency broadcast message in EBM TAR packet format. Upon successful verification, it maps the core fields of the emergency broadcast message to corresponding fields in the 5G MBS (5th Generation Multicast Broadcast Multimedia Service) based on a pre-defined field mapping rule library of the GY / T 385-2023 specification and the 3GPP (3rd Generation Partnership Project) standard. This mapping includes: mapping the message number to the 5G MBS service name and session identifier, and generating a temporary mobile group identifier conforming to the 3GPP standard as the service identifier; mapping the hierarchical message levels to the 5G system's allocation and maintenance priority and 5G quality of service identifier priority parameters; mapping the administrative division code list to a multicast broadcast multimedia service area in the form of a multicast broadcast multimedia service area identifier list; mapping various message content types (text / audio / video / additional data) to corresponding 5G MBS content fields; mapping the issuing organization to the 5G MBS content provider identifier; and mapping time parameters to 5G MBS session scheduling time parameters. During the mapping process, time zone conversion, format transcoding, and encoding adaptation are performed. The transmission unit is also used to: encapsulate the mapped 5G MBS field content into 5G broadcast session data according to the reference point xMB interface requirements of the 3GPP TS 26.348 specification, and send it to the broadcast multicast service center BM-SC of the 5G core network through the second preset interface, so that the BM-SC triggers the 5G broadcast session process.

[0009] According to some embodiments of the present invention, mapping the list of administrative division codes to a multicast multimedia service area in the form of a multicast multimedia service area identifier list includes: It has a built-in database that maps administrative division codes to multicast multimedia service area identifiers. Based on the list of administrative division codes in the emergency broadcast message, it queries the database and converts them into the corresponding list of multicast multimedia service area identifiers. If it is a nationwide emergency broadcast, it maps to all multicast multimedia service area identifiers. If it is a local emergency broadcast, it maps to only the multicast multimedia service area identifiers of the corresponding area, thereby reducing the ineffective use of fifth-generation broadcast network resources.

[0010] According to some embodiments of the present invention, mapping the tiered message levels to allocation and retention priorities and fifth-generation quality of service identifier priority parameters of the 5G system includes: The system maps critical level 1 emergency broadcast messages to the highest priority allocation and retention priority values ​​and the fifth-generation quality of service identifier 65 / 66 parameters corresponding to mission-critical services. Critical level 2 messages are mapped to the next highest priority allocation and retention priority and fifth-generation quality of service identifier parameters. Major level 3 and general level 4 messages are mapped to the regular priority allocation and retention priority and fifth-generation quality of service identifier parameters, ensuring that high-level emergency messages are transmitted with priority when the network is congested.

[0011] According to some embodiments of the present invention, the step of mapping multi-type message content to corresponding 5G MBS content fields according to text / audio / video / attached data classification includes: Plain text content: Extract text data and encode it into UTF-8 format, encapsulate it into a JSON or XML file, and then map it to 5GB MBS of file delivery content. Audio attachment content: Extract audio data, transcode audio in non-broadcast multicast service center supported formats into the high-efficiency advanced audio coding format HE-AAC, map both natively supported formats to 5G MBS streaming media content and encapsulate it into Real-Time Transport Protocol (RTP) stream; Video attachment content: Extract video data, transcode non-H.264 / H.265 format videos, map them to 5G MBS streaming media content and encapsulate them into RTP; Additional data: Associated Delivery content directly mapped to 5G MBS, transmitted as an auxiliary data stream or metadata along with the main content.

[0012] According to some embodiments of the present invention, mapping the time parameters to 5G MBS session scheduling time parameters includes: The release time, validity period, and broadcast time of the emergency broadcast message are mapped sequentially to the 5G MBS session start time, session end time, and actual transmission time of the 5G broadcast content. All time parameter mappings include UTC time zone conversion and 3GPP standard time format conversion.

[0013] For emergency broadcasts that are broadcast immediately, the session start time is set to the current time. For emergency broadcasts that are broadcast on a schedule, the session start time is set to the scheduled broadcast time. All time parameter mappings are completed with Coordinated Universal Time (UTC) time zone conversion and 3rd Generation Partnership Project (GPP) standard time format conversion.

[0014] According to some embodiments of the present invention, the validity verification of the EBM TAR packet format emergency broadcast message includes: The emergency broadcast message in the EBM TAR packet format undergoes a three-level validity verification process: message format verification, digital signature verification, and message integrity verification. If the verification passes, a receipt confirmation message containing the processing result and processing status is returned to the emergency information platform. If the verification fails, the process is terminated and an error message is fed back.

[0015] According to some embodiments of the present invention, the step of mapping message numbers to 5G MBS service names and session identifiers and generating temporary mobile group identifiers conforming to 3GPP standards as service identifiers includes: The nationally unique emergency broadcast message number, consisting of the issuing organization code, timestamp, and serial number, will be used as the core part of the service name in the service creation request of the broadcast multicast service center. The session identifier will be automatically generated by the broadcast multicast service center or specified by the emergency information adaptation equipment, ensuring its uniqueness within the same service. The temporary mobile group identifier will consist of the public land mobile network identifier and the flow identifier, and will be allocated through application to the operator, serving as the unique service identifier for 5G MBS.

[0016] According to some embodiments of the present invention, the step of encapsulating the mapped 5G MBS field content into 5G broadcast session data and sending it to the 5G core network's broadcast multicast service center BM-SC through a second preset interface, thereby triggering the 5G broadcast session process by the BM-SC, includes: The 5G broadcast session data is separated into multicast control channel control information and multicast service channel service data; the xMB interface is a dual-plane interface based on the Representational State Transfer Application Programming Interface design style, Hypertext Transfer Protocol and JavaScript object representation data format, namely, a control plane reference point interface and a user plane reference point interface; The encapsulated 5G broadcast session data, along with the separated multicast control channel control information and multicast service channel service data, are sent to the broadcast multicast service center of the 5G core network via the second preset interface. The broadcast multicast service center then triggers the 5G broadcast session process and completes the subsequent 3GPP broadcast network distribution.

[0017] According to some embodiments of the present invention, 5G broadcast network resources are requisitioned through a resource preemption mechanism only when the highest level emergency occurs, and the resources are released immediately after the event ends.

[0018] The emergency information adaptation device works in conjunction with the broadcast multicast service center to achieve on-demand allocation of resources. Under normal circumstances, it does not occupy any additional resources of the fifth-generation broadcast network. Only when a level-one emergency broadcast message is detected, the resource preemption mechanism is triggered instantaneously to requisition the required radio and core network resources. After the emergency event ends, the broadcast multicast service center terminates the fifth-generation broadcast session, and the emergency information adaptation device simultaneously triggers a resource release command to ensure that the fifth-generation broadcast network resources return to normal operation.

[0019] This invention also proposes a fifth-generation emergency broadcasting system, comprising: an emergency information platform, an emergency information adaptation device as described above, a fifth-generation core network, a multicast scheduling entity, a fifth-generation broadcasting base station, and an emergency broadcasting terminal; The emergency information platform is used to generate, review, and issue emergency broadcast messages in accordance with the GY / T 385-2023 standard and send them to emergency information adaptation devices; The fifth-generation core network is used to complete the authentication, management and resource scheduling of fifth-generation broadcast sessions through the broadcast multicast service center; The multicast scheduling entity is used to receive session control signaling from the broadcast multicast service center, manage all base stations within the single-frequency network area, and issue unified radio resource configuration and scheduling information. The fifth-generation broadcast base station is used to complete the air interface transmission of emergency broadcast data through a single-frequency network mode. The emergency broadcast terminal is used to parse, present, and play emergency broadcast messages.

[0020] This invention also proposes a computer program product, including a computer program that, when executed by a processor, implements the steps of parsing and mapping emergency broadcast messages to 3GPP broadcasts as described above.

[0021] By employing the embodiments of the present invention, the system can achieve low coupling and easy deployment, improve the utilization efficiency of 5G broadcast network resources, and ensure that emergency broadcast information can be accurately, forcefully, and quickly delivered to user mobile terminals and dedicated emergency terminals through the 5G terrestrial broadcast network.

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of the embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. In the drawings: Figure 1 This is a schematic diagram of the architecture of the fifth-generation emergency broadcasting system in an embodiment of the present invention. Detailed Implementation

[0024] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art. Furthermore, in some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0025] Broadcasting emergency information via 5G terrestrial broadcast networks is a trend in emergency broadcasting technology development and a strategic requirement for enhancing emergency response capabilities. This integration overcomes the shortcomings of traditional emergency broadcasting in mobile reception and data service capabilities. However, merging emergency broadcasting with 5G terrestrial broadcast networks requires solving a series of complex technical challenges that cross domains and protocol stacks, primarily including the following aspects: (1) Integration of heterogeneous systems and signaling architecture: The emergency broadcasting platform is an independent business system, and its information release and management processes follow the broadcasting industry standards. However, the 5G broadcast network is a complex communication system based on the 3GPP standard. How to establish an efficient and reliable signaling handshake and service triggering mechanism between the two heterogeneous systems is the primary technical challenge to be solved.

[0026] (2) Emergency message format adaptation and content encapsulation issues: GY / T 385-2023 standard defines the structured data format of emergency messages, while 5G broadcasts usually carry streaming media or files based on the IP protocol.

[0027] The core aspect of ensuring business implementation is to adapt and encapsulate structured emergency instructions and text content into IP data packets and rich media content (such as synthesized speech, graphic cards, and short videos) suitable for 5G broadcast channel transmission in real time and automatically.

[0028] This invention proposes a 5G terrestrial broadcast emergency information transmission system based on a dedicated emergency information adaptation device. Its core function lies in the ability of the emergency information adaptation device to parse and verify structured emergency messages conforming to the GY / T 385-2023 specification, and map and encapsulate them into 5G broadcast session data conforming to 3GPP standards. This device is a key gateway connecting heterogeneous systems (emergency broadcast platform and 5G broadcast network), achieving decoupling of services and bearer. The core technology lies in an end-to-end interface mapping method, specifically including: a first preset interface (defined as the I-EIP-EBAE interface): following emergency broadcast industry standards, enabling secure reception and status feedback of emergency messages. Another first preset interface (defined as the I-EBAE-BMSC interface): based on the 3GPP xMB standard interface, converting emergency tasks into 5G MBS sessions in real time, and separating and injecting MCCH control information and MTCH service data into the 5G network. This method ensures that emergency broadcasts can be triggered and transmitted quickly.

[0029] In detail, the emergency broadcast information transmission system based on 5G terrestrial broadcasting (i.e., the fifth-generation broadcast emergency broadcasting system) of this invention delivers rich media emergency information conforming to national standards to user mobile terminals and dedicated emergency terminals accurately and forcefully through the 5G tower broadcasting network. (Refer to...) Figure 1 As shown, the fifth-generation emergency broadcasting system mainly consists of the following five core components: (1) Emergency Information Platform (EIP): The source of emergency information generates, reviews, and issues emergency broadcast messages (EBM) in accordance with the GY / T 385-2023 standard. An EBM TAR package containing an XML description file and optional media files is generated and sent to the emergency information adaptation device via the I-EIP-EBAE interface.

[0030] (2) Emergency Broadcast Adaptation Equipment (EBAE): The core gateway for 5G emergency broadcasting enables protocol conversion between emergency broadcast information and the 5G broadcast protocol. The emergency broadcast adapter is a device that receives, parses, verifies, converts protocols, signs, encapsulates, and stores emergency broadcast messages. It pushes verified EBM TAR packets (i.e., service payloads) to the BM-SC via the data plane interface for subsequent distribution.

[0031] (3) 5G Core Network (Broadcast Elements): The 5G core network mainly includes key gateways such as BM-SC (Broadcast Multicast Service Center) and MBMS-GW (MBMS Gateway). BM-SC is responsible for handling xMB requests from adaptation devices, performing authentication and session management, generating service announcements, and controlling the session initiation process between MBMS-GW and MCEs. MBMS-GW is responsible for receiving emergency broadcast content data from adaptation devices and distributing it to one or more MCEs via IP multicast.

[0032] (4) Multi-cell / multicast Coordination Entity (MCE): The MCE receives session control signaling from the BM-SC and is responsible for managing all base stations within an SFN area. It sends unified radio resource configuration and scheduling information to the base stations to ensure synchronous transmission of all base stations within the SFN.

[0033] (5) Emergency Broadcast Terminal (EBT): The ultimate recipient of emergency information, a general-purpose mobile terminal, requires the terminal chip and operating system layer to support LTE-based 5G broadcasting to achieve coverage of emergency information management.

[0034] Dedicated emergency terminal: It connects to the network via a built-in 5G broadcast receiver module, and is equipped with a dedicated receiver for specific groups (such as residents in remote areas and people with disabilities).

[0035] The emergency information adaptation device is a network element that connects the emergency broadcast platform and the 5G broadcast system. This device performs two core functions: first, it interfaces with the emergency broadcast system, and second, it interfaces with the 5G core network BM-SC. At the same time, it realizes the protocol conversion between the emergency broadcast message format and the 5G MBS data format.

[0036] Regarding the interface with the emergency broadcasting system, the emergency information adaptation device needs to implement data interaction functionality with the emergency broadcasting platform. According to the requirements of the "Emergency Broadcasting Platform Interface Specification," this interface supports functions such as receiving, parsing, verifying, and responding to emergency broadcast messages. The emergency broadcasting platform sends emergency broadcast messages conforming to the GY / T 385-2023 format to the adaptation device through this interface. The message content includes message number, message type, message level, issuing organization, publication time, validity period, coverage area, and message content. After receiving the message, the adaptation device first verifies the message, including message format verification, digital signature verification, and message integrity verification, to ensure the reliability of the message source and the completeness of the content. After successful verification, the adaptation device needs to return a reception confirmation message to the emergency broadcasting platform, containing information such as the processing result and processing status.

[0037] Regarding the interface with the 5G core network BM-SC, the emergency information adaptation equipment needs to implement the xMB interface function based on the 3GPP TS26.348 specification. The xMB reference point is a standardized interface between the content provider and the BM-SC, used to set up and manage MBMS user services. This interface adopts a RESTful API design style, is based on the HTTP protocol, and uses JSON data format for information exchange. The xMB interface is divided into two parts: the control plane (xMB-C) and the user plane (xMB-U). The control plane is used for service management, session management, and configuration management, while the user plane is used for content data ingestion.

[0038] The core function of the emergency information adaptation equipment is to achieve a complete mapping from the GY / T 385-2023 emergency broadcast message format to the 5G MBS service data format. The key logic of protocol conversion is to establish the correspondence between fields to ensure that emergency broadcast information can be transmitted accurately and completely in the 5G broadcast system.

[0039] Regarding message identifier mapping, the emergency broadcast message number defined in GY / T 385-2023 needs to be mapped to the session identifier and service identifier of 5G MBS. The emergency broadcast message number is a unique identifier for the message, typically composed of the issuing organization code, timestamp, and sequence number, and is nationally unique. In the 5G MBS system, MBMS user services are identified by a service identifier, and transmission sessions are identified by a session identifier. The protocol conversion logic recommends including the emergency broadcast message number as part of the service name in the BM-SC service creation request, while simultaneously generating a TMGI (Temporary Mobile Group Identity) conforming to 3GPP specifications as the service identifier. The TMGI consists of a PLMN ID and a flow identifier, and needs to be allocated by the operator. The session identifier can be automatically generated by the BM-SC or specified by the adapting device, and its uniqueness within the same service must be guaranteed.

[0040] Regarding the mapping of message levels to QoS priorities, emergency broadcast messages are typically divided into multiple levels, such as extremely critical (Level I), critical (Level II), significant (Level III), and general (Level IV). Different message levels have different requirements for transmission timeliness and reliability. The protocol conversion logic needs to map message levels to the ARP (Allocation and Retention Priority) parameters and 5QI parameters of the 5G system. It is recommended that Level I messages be mapped to the highest priority ARP value and 5QI 65 / 66 (mission-critical service) to ensure priority transmission under any network conditions; Level II messages should be mapped to the second highest priority; and Level III and Level IV messages should be mapped to normal priorities. This mapping mechanism ensures that high-level emergency information can still be delivered in a timely manner even when the network is congested.

[0041] Regarding coverage area mapping, the coverage areas defined in emergency broadcast messages (usually represented by a list of administrative division codes) need to be mapped to MBMS service areas. An MBMS service area consists of a set of MBMS SAIs (Service Area Identities), with each MBMS SAI corresponding to the coverage area of ​​one or more base stations. The protocol conversion logic needs to maintain a database of mapping relationships between administrative divisions and MBMS SAIs. Based on the coverage area code list in the emergency broadcast message, it queries the corresponding MBMS SAI list and specifies the service area in the BM-SC session creation request. For nationwide emergency broadcasts, all MBMS SAIs can be specified; for localized emergency broadcasts, only the relevant MBMS SAIs are specified, reducing unnecessary resource consumption.

[0042] Regarding message content mapping, the message content fields defined in GY / T 385-2023 require different processing depending on the content type. For plain text content, the text data can be directly extracted and transmitted according to the file delivery mode of the xMB interface; the text content can be encoded in UTF-8 format, encapsulated as a JSON or XML file, or converted to a dedicated format suitable for terminal display. For audio attachments, the audio data needs to be extracted and transcoded or directly encapsulated according to the audio format; if the audio format is a format supported by BM-SC (such as MP3, AAC), it can be transmitted directly; if it is another format (such as WAV, PCM), encoding conversion is required first. For video attachments, the processing method is similar to that of audio, requiring format checking and necessary transcoding.

[0043] Regarding time parameter mapping, time parameters such as release time, validity time, and broadcast time in emergency broadcast messages need to be mapped to BM-SC session scheduling parameters. The release time corresponds to the session start time, the validity time corresponds to the session end time, and the broadcast time corresponds to the actual transmission time of the content. The protocol conversion logic needs to consider issues such as time zone conversion and time format conversion to ensure accurate transmission of time parameters. For emergency broadcasts that are broadcast immediately, the session start time should be set to the current time or a later time; for emergency broadcasts that are broadcast on a schedule, the session start time should be set to the scheduled broadcast time.

[0044] Table 1. Mapping Relationship of Key Protocol Fields Implemented by Emergency Information Adaptation Equipment

[0045] The present invention effectively solves the core technical problems of heterogeneous system integration and protocol format adaptation in the process of integrating emergency broadcasting and 5G broadcasting through the above technical solution. Compared with the prior art, it has the following significant advantages: Achieving efficient integration of heterogeneous systems and accurate end-to-end protocol mapping: Taking the emergency information adaptation device as the core gateway, a signaling handshake and service triggering mechanism was built between the emergency broadcast platform and the 5G broadcast network. It realized the accurate mapping of all fields from the GY / T385-2023 specification to the 3GPP standard, and completed the automated adaptation and encapsulation of structured emergency broadcast messages to IP data packets and rich media content that can be transmitted by 5G broadcast. It solved the technical integration problems of cross-domain and cross-protocol stack.

[0046] The system is loosely coupled, easy to deploy, and has low modification costs: The core modification point of this invention is concentrated on the independent network element of the emergency information adaptation device. Only software upgrades and functional enhancements are needed to realize the core protocol conversion function, without the need to modify the large and complex emergency broadcast platform core system and 5G core network architecture. For operators, it is only necessary to open the standard application programming interface in the broadcast multicast service center and ensure that the network supports the quality of service based on allocation and priority. Most of the work is configuration-related, which greatly reduces the difficulty of implementation and deployment cycle of the solution.

[0047] The 5G broadcast network utilizes resources efficiently, balancing emergency needs with daily operational economy: This invention designs a resource allocation and preemption mechanism on demand. Under normal circumstances, emergency broadcast services do not occupy any additional resources of the 5G broadcast network. Only when the highest level of emergency occurs is the resource preemption mechanism triggered instantaneously to requisition the required radio and core network resources. After the emergency ends, the session is terminated and the resources are released immediately. This ensures high-priority transmission of emergency broadcasts while avoiding the ineffective occupation of network resources.

[0048] Emergency broadcasts are highly timely and reliable: precise mapping between message levels and 5G service quality priorities ensures that high-level emergency messages are transmitted with priority even during network congestion; simultaneously, the separate transmission of multicast control channels and multicast service channels adapts to 5G broadcast air interface transmission specifications, guaranteeing rapid delivery of emergency information and accurate terminal parsing; furthermore, three-level validity verification and data association verification ensure the reliability of the source and the integrity of the content of emergency broadcast messages.

[0049] The standardized interface design ensures the openness, interoperability, and future evolution of the solution: the emergency information adaptation equipment and the emergency information platform follow the interface specifications of the broadcasting industry's emergency broadcasting platform, and the interface with the 5G core network broadcast multicast service center strictly follows the reference point interface requirements of the 3GPP TS 26.348 specification. The design based on standard interfaces enables this solution to have good openness and device interoperability, while also being able to adapt to the enhancements and upgrades of 5G broadcast capabilities in subsequent versions of 3GPP, and possessing sustainable evolution capabilities.

[0050] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0051] It should be noted that any content not described in detail in this specification is common knowledge to those skilled in the art.

[0052] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular hardware and software combination.

Claims

1. A method for parsing and mapping emergency broadcast messages to 3GPP broadcasts, characterized in that, include: By following the first preset interface of the emergency broadcasting platform interface specification of the broadcasting industry, the system receives emergency broadcasting messages in EBM TAR format, which contain an Extensible Markup Language (XML) description file and optional media files, sent by the emergency information platform. The EBM TAR format emergency broadcasting messages at least include a message number, a graded message level, a coverage area in the form of an administrative division code list, multiple types of message content, time parameters, and a core field of the issuing organization. The validity of the emergency broadcast message in the EBM TAR packet format is verified. After the verification is successful, the mapping of the core fields of the emergency broadcast message to the corresponding fields of the fifth generation multicast broadcast multimedia service 5G MBS is completed based on the preset field mapping rule library of GY / T 385-2023 specification and 3GPP standard. The mapping includes mapping the message number to the service name and session identifier of 5G MBS and generating a temporary mobile group identifier that conforms to the 3GPP standard as the service identifier. The message levels are mapped to the allocation and maintenance priorities and fifth-generation quality of service (QoS) identifier priority parameters of the 5G system; the administrative division code list is mapped to the multicast broadcast multimedia service area in the form of a multicast broadcast multimedia service area identifier list; the various message content types are categorized as text / audio / video / additional data and mapped to the corresponding content fields of 5G MBS; the publishing organization is mapped to the content provider identifier of 5G MBS; and the time parameters are mapped to the session scheduling time parameters of 5G MBS, with time zone conversion, format transcoding, and encoding adaptation completed during the mapping process. In accordance with the reference point xMB interface requirements of 3GPP TS 26.348, the mapped 5G MBS field content is encapsulated into 5G broadcast session data and sent to the 5G core network broadcast multicast service center BM-SC through the second preset interface, and the BM-SC triggers the 5G broadcast session process.

2. The method as described in claim 1, characterized in that, The mapping of the administrative division code list to the multicast broadcast multimedia service area in the form of a multicast broadcast multimedia service area identifier list includes: It has a built-in database that maps administrative division codes to multicast multimedia service area identifiers. Based on the list of administrative division codes in the emergency broadcast message, it queries the database and converts them into the corresponding list of multicast multimedia service area identifiers. If it is a nationwide emergency broadcast, it maps to all multicast multimedia service area identifiers. If it is a local emergency broadcast, it maps to only the multicast multimedia service area identifiers of the corresponding area, thereby reducing the ineffective use of fifth-generation broadcast network resources.

3. The method as described in claim 1, characterized in that, The process of mapping multi-type message content to corresponding 5G MBS content fields based on text / audio / video / attached data classification includes: Plain text content: Extract text data and encode it into UTF-8 format, encapsulate it into a JSON or XML file, and then map it to 5GB MBS of file delivery content. Audio attachment content: Extract audio data, transcode audio in non-broadcast multicast service center supported formats into the high-efficiency advanced audio coding format HE-AAC, map both natively supported formats to 5G MBS streaming media content and encapsulate it into Real-Time Transport Protocol (RTP) stream; Video attachment content: Extract video data, transcode non-H.264 / H.265 format videos, map them to 5G MBS streaming media content and encapsulate them into RTP; Additional data: Associated Delivery content directly mapped to 5G MBS, transmitted as an auxiliary data stream or metadata along with the main content.

4. The method as described in claim 1, characterized in that, The mapping of time parameters to 5G MBS session scheduling time parameters includes: The release time, validity period, and broadcast time of the emergency broadcast message are mapped sequentially to the 5G MBS session start time, session end time, and actual transmission time of the 5G broadcast content. All time parameter mappings include UTC time zone conversion and 3GPP standard time format conversion.

5. The method as described in claim 1, characterized in that, The validity verification of the emergency broadcast message in the EBM TAR packet format includes: The emergency broadcast message in the EBM TAR packet format undergoes a three-level validity verification process: message format verification, digital signature verification, and message integrity verification. If the verification passes, a receipt confirmation message containing the processing result and processing status is returned to the emergency information platform. If the verification fails, the process is terminated and an error message is fed back.

6. The method as described in claim 1, characterized in that, The process of encapsulating the mapped 5G MBS field content into 5G broadcast session data and sending it to the 5G core network's broadcast multicast service center BM-SC via a second preset interface, whereby the BM-SC triggers the 5G broadcast session procedure, includes: The 5G broadcast session data is separated into multicast control channel control information and multicast service channel service data; the xMB interface is a dual-plane interface based on the Representational State Transfer Application Programming Interface design style, Hypertext Transfer Protocol and JavaScript object representation data format, namely, a control plane reference point interface and a user plane reference point interface; The encapsulated 5G broadcast session data, along with the separated multicast control channel control information and multicast service channel service data, are sent to the broadcast multicast service center of the 5G core network via the second preset interface. The broadcast multicast service center then triggers the 5G broadcast session process and completes the subsequent 3GPP broadcast network distribution.

7. The method as described in claim 1, characterized in that, 5G broadcast network resources shall be requisitioned through a resource preemption mechanism only when the highest level of emergency occurs, and the resources shall be released immediately after the event ends.

8. An emergency information adaptation device, characterized in that, include: The transmission unit is used to receive emergency broadcast messages in EBM TAR format, which contain an Extensible Markup Language (XML) description file and optional media files, sent by the emergency information platform through a first preset interface that conforms to the interface specification of the broadcasting industry emergency broadcast platform. The EBM TAR format emergency broadcast message contains at least a message number, a graded message level, a coverage area in the form of an administrative division code list, multiple types of message content, time parameters, and a core field of the issuing organization. The processing unit is used to verify the validity of the emergency broadcast message in the EBM TAR packet format. After the verification is successful, it completes the mapping of the core fields of the emergency broadcast message to the corresponding fields of the fifth generation multicast broadcast multimedia service 5G MBS based on the preset field mapping rule library of GY / T 385-2023 specification and 3GPP standard. The mapping includes mapping the message number to the service name and session identifier of 5G MBS and generating a temporary mobile group identifier that conforms to the 3GPP standard as the service identifier. The message levels are mapped to the allocation and maintenance priorities and fifth-generation quality of service (QoS) identifier priority parameters of the 5G system; the administrative division code list is mapped to the multicast broadcast multimedia service area in the form of a multicast broadcast multimedia service area identifier list; the various message content types are categorized as text / audio / video / additional data and mapped to the corresponding content fields of 5G MBS; the publishing organization is mapped to the content provider identifier of 5G MBS; and the time parameters are mapped to the session scheduling time parameters of 5G MBS, with time zone conversion, format transcoding, and encoding adaptation completed during the mapping process. The transmission unit is also used to: encapsulate the mapped 5G MBS field content into 5G broadcast session data according to the reference point xMB interface requirements of the 3GPP TS 26.348 specification, and send it to the broadcast multicast service center BM-SC of the 5G core network through the second preset interface, so that the BM-SC triggers the 5G broadcast session process.

9. A fifth-generation emergency broadcasting system, characterized in that, include: Emergency information platform, emergency information adaptation equipment as described in claim 8, fifth-generation core network, multicast scheduling entity, fifth-generation broadcast base station and emergency broadcast terminal; The emergency information platform is used to generate, review, and issue emergency broadcast messages in accordance with the GY / T 385-2023 standard and send them to emergency information adaptation devices; The fifth-generation core network is used to complete the authentication, management and resource scheduling of fifth-generation broadcast sessions through the broadcast multicast service center; The multicast scheduling entity is used to receive session control signaling from the broadcast multicast service center, manage all base stations within the single-frequency network area, and issue unified radio resource configuration and scheduling information. The fifth-generation broadcast base station is used to complete the air interface transmission of emergency broadcast data through a single-frequency network mode. The emergency broadcast terminal is used to parse, present, and play emergency broadcast messages.

10. A computer program product, characterized in that, The method includes a computer program that, when executed by a processor, implements the steps of parsing and mapping an emergency broadcast message to a 3GPP broadcast as described in any one of claims 1 to 7.

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