Public security has become an important guarantee for the normal economic and social development of all countries in the world and the normal operation of national management. In order to prevent human beings from suffering from sudden major natural disasters such as earthquakes, typhoons, and floods, governments of all countries are conducting research on public early warning systems. The PWS (Public warning system) public early warning system introduces a method of promptly sending early warning notifications to mobile users who are about to happen in multiple or a certain area and need to immediately transfer and evacuate. Through terminal support, it can display different types of alarms for specific alarm types such as ETWS earthquake, tsunami, and CMAS (Commercial Mobile Alert System). When the user receives an alarm message, the information automatically pops up and plays a specific alert tone for Users get the warning information quickly and timely.
In recent years, local governments have begun to require operators to build emergency early warning systems for public incidents to avoid reducing major losses caused by emergencies. South America, the European Union, and China's Hong Kong region have clearly defined legislation that requires operators to build public early warning systems, and requires that mobile terminals sold in the local network must support PWS business functions.
Compared with traditional short messages, the early warning broadcast system has the following business characteristics:
Technical requirements for the construction of public early warning system
The public early warning system is a platform for social public warning services. When building this platform, the government/operator faces the following challenges and technical requirements:
â— Unified operator network access, one set of platform accesses all operator networks in a country or region. Facilitate the government or public emergency center to quickly send early warning information to all operators in the area;
â— Multi-standard network access, different operators may have 2G/3G/4G/5G network coexistence scenarios, and it is necessary to ensure that terminals of different standards can receive the alarm messages issued by the emergency center;
â— Flexible broadcast area management needs to be able to support free selection of specific target areas, fixed administrative areas, and entire network areas for broadcasting;
â— CBE (cell broadcast entities) requires simplicity and ease of use. For end users, network types, operators, and wireless data need to be transparent to facilitate the use of public early warning and emergency centers;
â— Multi-CBE (cell broadcast entities) access requires the ability to access a variety of emergency information release centers, such as the Seismological Bureau, Maritime Safety Bureau, Meteorological Bureau, and Police Bureau, to release different types of early warning information;
â— A variety of deployment method requirements, the system needs to flexibly support cloud deployment or physical machine deployment according to different site requirements;
â— The timeliness of sending warning information is required. After the warning message is generated, it needs to be sent to the user terminal user in the target area within a short time (for example, 10 seconds). At the same time, the performance of the wireless device must be considered. Cause a big impact.
Realize public warning service PWS based on innovative business platform
The PWS system is based on an innovative service platform. It provides a comprehensive solution for the telecom network application layer and supports the access of multiple telecom network protocols, such as INAP, MAP, WIN, CAP, Diameter, SMPP, CBC-BSC, Iu- BC, SBc, N50 and other interfaces. The innovative business platform solution can provide enterprises and individuals with rich voice, messaging and multimedia value-added services under 2G, 3G, 4G and 5G networks, such as VPBX, IVR, USSD, Call Assist, PWS, prepaid, and RBT And other value-added services.
ZTE Corporation has a deep understanding of the government and operators’ public early warning needs. Based on years of experience in the highly reliable design of telecommunication equipment, and based on a mature and innovative business platform, ZTE has launched a new generation of PWS emergency early warning system to help governments and operators achieve emergency early warning The rapid deployment of the system provides high-performance and reliable public early warning services.
The PWS system architecture is as follows:
ZTE PWS architecture
Deployment of emergency warning system:
â— Support NFV cloud deployment, reduce operator TCO on-demand deployment;
â— Supports virtualization deployment, which can share virtual machine resources with other services and reduce CAPEX;
â— Support the automatic and rapid deployment of services, and shorten the TTM of service launches;
â— Support physical machine deployment, and provide physical machine deployment solutions for customers who do not have a virtualized environment.
The emergency warning system PWS can realize the following functions:
â— Provides a converged CBG (Cell Broadcast Gateway) broadcast gateway: It realizes the ability to connect to multi-operator networks (multiple PLMN) and multi-standard networks. Only one system is required to complete the connection of all operators and all standard wireless networks;
â— Supports interface capabilities of multiple network standards: It has the current limiting function for different single network devices to adapt to the processing capabilities of wireless devices, and supports different BSC/RNC/MME/AMF devices with different maximum flow functions;
â— Support data management of automatic wireless early warning broadcast: provide the ability to automatically load, manage and update wireless early warning broadcast data, synchronize wireless side data to ensure CBC (cell broadcast center) data update;
â— Provide external SOAP interface capabilities: support multiple third-party CBE (cell broadcast entities) access through standard SOAP interfaces, and ZTE PWS system provides CBC (cell broadcast center) broadcast function;
â— Support flexible broadcast area management function: The built-in CBE content management function provides a variety of multi-dimensional broadcast area management and selection functions. Allow users to select specific pre-defined areas, administrative areas, and entire network areas for early warning news release. Provides the ability to connect to Google's map, allowing to call the map API to select a specific geographic area (supporting circular, rectangular, polygonal areas, etc.) for message sending;
â— System adaptive broadcast mode selection: For 4G and 5G networks, the 3GPP specifications specify a variety of broadcast methods CGI, TAI, and Emergency area methods. For large-area or entire network broadcast methods, the system adaptively selects TAI or Emergency area methods , To ensure that the message is quickly broadcast to the entire network to avoid sending large amounts of data through Cell;
â— Supports large-capacity and high-concurrent message sending: Up to 100 WRITE-REPLACE message group packets per second are sent, and the maximum number of Cell List configuration based on alarm messages is supported to adapt to the processing of alarm messages by BSC/RNC/MME/AMF Claim.
The PWS system based on the innovative business platform has successfully provided stable and reliable public early warning services for operators and governments in many countries and regions around the world. With the emphasis on public early-warning services around the world, the PWS system will continue to innovate and cooperate with global operators and governments to provide users with better public early-warning services.
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