Cell Broadcast (CB) is a method of simultaneously sending short messages to multiple

mobile telephone A mobile phone or cell phone is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones ( landline phones). This radio ...

users in a defined area. It is defined by the

ETSI The European Telecommunications Standards Institute (ETSI) is an independent, not-for-profit, standardization organization operating in the field of Information and communications technology, information and communications. ETSI supports the de ...

's GSM committee and

3GPP The 3rd Generation Partnership Project (3GPP) is an umbrella term for a number of standards organizations which develop protocols for mobile telecommunications. Its best known work is the development and maintenance of: * GSM and related 2G and ...

and is part of the 2G, 3G, 4G and 5G standards. It is also known as Short Message Service-Cell Broadcast (SMS-CB or CB SMS). Unlike Short Message Service-Point to Point (SMS-PP), Cell Broadcast is a one-to-many geo-targeted and

geo-fence A geofence is a virtual "perimeter" or "fence" around a given geographic feature. A geofence can be dynamically generated (as in a radius around a point location) or match a predefined set of boundaries (such as school zones or neighborhood b ...

d messaging service. Cell Broadcast technology is widely used for public warning systems.

History

Cell Broadcast messaging was first demonstrated in Paris in 1997. Some mobile operators used Cell Broadcast for communicating the

area code A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...

of the antenna cell to the mobile user (via channel 050), for nationwide or citywide alerting, weather reports, mass messaging, location-based news, etc. Cell broadcast has been widely deployed since 2008 by major Asian, US, Canadian, South American and European network operators. Not all operators have the Cell Broadcast messaging function activated in their network yet, but most of the currently used handsets support cell broadcast, however on many devices it is disabled by default and there isn't a standardised interface to enable the feature.

Technology

One Cell Broadcast message can reach a large number of telephones at once. Cell Broadcast messages are directed to specific

radio cell A cellular network or mobile network is a telecommunications network where the link to and from end nodes is wireless and the network is distributed over land areas called ''cells'', each served by at least one fixed-location transceiver (suc ...

s of a mobile phone network, rather than to a specific telephone. The latest generation of Cell Broadcast Systems (CBS) can send to the whole mobile network (e.g. 1,000,000 cells) in less than 10 seconds, reaching millions of mobile subscribers at the same time. A Cell Broadcast message is an unconfirmed

push Push may refer to: * A type of force applied to an object Music * Mike Dierickx (born 1973), a Belgian producer also known as Push Albums * ''Push'' (Bros album), 1988 * ''Push'' (Gruntruck album), 1992 * ''Push'' (Jacky Terrasson album), 201 ...

service, meaning that the originators of the messages do not know who has received the message, allowing for services based on anonymity. Cell Broadcast is compliant with the latest EU General Data Protection Regulation (GDPR) as mobile phone numbers are not required by CB. The originator (alerting authority) of the Cell Broadcast message can request the success rate of a message. In such a case the Cell Broadcast System will respond with the number of addressed cells and the number of cells that have broadcast the Cell Broadcast (alert) message. Each radio cell covers a certain geographic area, typically a few kilometers in diameter, so by only sending the Cell Broadcast message to specific radio cells, the broadcast can be limited to a specific area (

geotargeting In geomarketing and internet marketing, geotargeting is the method of delivering different content to visitors based on their geolocation. This includes country, region/state, city, metro code/ zip code, organization, IP address, ISP, or other c ...

). This is useful for messages that are only relevant in a specific area, such as flood warnings. The CB message parameters contain the broadcasting schedule. If the start-time is left open, the CBC system will assume an immediate start, which will be the case for Public Warning messages. If the end-time is left open, the message will be repeated indefinitely. A subsequent cancel message shall be used to stop this message. The repetition rate can be set between 2 seconds and to values beyond 30 minutes. Each repeated CB message will have the same message identifier (indicating the source of the message), and the same serial number. Using this information, the mobile telephone is able to identify and ignore broadcasts of already received messages. A Cell Broadcast message page is composed of 82

octet Octet may refer to: Music * Octet (music), ensemble consisting of eight instruments or voices, or composition written for such an ensemble ** String octet, a piece of music written for eight string instruments *** Octet (Mendelssohn), 1825 compo ...

s, which, using the default character set, can encode 93 characters. Up to 15 of these pages may be concatenated to form a Cell Broadcast message (hence maximum length of one Cell Broadcast message is therefore 1395 characters). A Cell Broadcast Centre (CBC), a system which is the source of SMS-CB message, is connected to a Base Station Controller (BSC) in

GSM The Global System for Mobile Communications (GSM) is a family of standards to describe the protocols for second-generation (2G) digital cellular networks, as used by mobile devices such as mobile phones and Mobile broadband modem, mobile broadba ...

networks, to a Radio Network Controller (RNC) in

UMTS The Universal Mobile Telecommunications System (UMTS) is a 3G mobile cellular system for networks based on the GSM standard. UMTS uses Wideband Code Division Multiple Access, wideband code-division multiple access (W-CDMA) radio access technolog ...

networks, to a Mobility Management Entity (MME) in

LTE (telecommunication) In telecommunications, long-term evolution (LTE) is a standard for wireless broadband communication for cellular mobile devices and data terminals. It is considered to be a "transitional" 4G technology, and is therefore also referred to as 3 ...

networks or to a core Access and Mobility management Function (AMF) in 5G networks. The technical implementation of the Cell Broadcast service is described in the

specification TS 23.041 *The 2G-CBC (BSC) interface is described in

standard TS 48.049; however, non-standard implementations exist. *The 3G-CBC (RNC) interface is described in

standard TS 25.419. *The 4G-CBC (MME) interface is described in

standard TS 29.168. *The 5G-CBC (AMF) interface is described in

standard TS 29.518. A CBC sends CB messages, a list of cells where messages are to be broadcast, and the requested repetition rate and number of times they shall be broadcast to the BSC/RNC/MME/AMF. The BSC's/RNC's/MME/AMF responsibility is to deliver the CB messages to the base stations (BTSs),

Node B {{Unreferenced, date=May 2019, bot=noref (GreenC bot) Node B is the telecommunications node for mobile communication networks, namely those that adhere to the UMTS standard. The Node B provides the connection between mobile phones (User equipme ...

s, ENodeBs and gNodeBs which handle the requested cells.

Public Warning Systems

Cell Broadcast is not affected by traffic load; therefore, it is very suitable during a disaster when load spikes of data (

social media Social media are interactive technologies that facilitate the Content creation, creation, information exchange, sharing and news aggregator, aggregation of Content (media), content (such as ideas, interests, and other forms of expression) amongs ...

and

mobile app A mobile application or app is a computer program or software application designed to run on a mobile device such as a smartphone, phone, tablet computer, tablet, or smartwatch, watch. Mobile applications often stand in contrast to desktop appli ...

s), regular SMS and voice calls usage (

mass call event A mass call event or mass calling event (also MCE in telephony usage) is a situation in which an extraordinarily high number of telephone calls are attempted into or out of an area, causing tremendous network congestion, and resulting in service ...

s) tend to significantly congest mobile networks, as multiple events have shown. Public Warning Systems, otherwise known as Emergency Alert Systems, implemented through Cell Broadcast technology vary by country, but are broadly the same. Technical standards are outlined in the 3GPP TS 23.041 standard. Large implementations mentioned in 3GPP standards are Wireless Emergency Alerts (CMAS) in the United States and

EU-Alert EU-Alert is a Public Warning System designed to disseminate emergency alerts to mobile phones based on Cell Broadcast technology, as defined by ETSI standards. National authorities are able to disseminate emergency alerts and warning messages thr ...

in Europe (set out in

standards, but national implementation varies). Alerts can be geo-targeted, when only phones in a defined geographical area are set to receive an alert. When an alert is received, a notification is shown in a unique format and a dedicated sound is played even if the phone is set to silent: a of 853 Hz and 960 Hz

sine wave A sine wave, sinusoidal wave, or sinusoid (symbol: ∿) is a periodic function, periodic wave whose waveform (shape) is the trigonometric function, trigonometric sine, sine function. In mechanics, as a linear motion over time, this is ''simple ...

s, as prescribed by both WEA (CMAS) and ETSI standards. Cell Broadcast emergency alerts can be broadcast in a local language and an additional language, which will be displayed depending on the user's device language setting. Most phone manufacturers adhere to these standards but have slightly different user interfaces. Similar to emergency calls, devices do not usually need a

SIM card A typical SIM card (mini-SIM with micro-SIM cutout)A SIM card or SIM (subscriber identity module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are u ...

to receive alerts. National Weather Service Emergency Alert on an iPhone - Tornado Warning

Emergency Alerts in most implementations of Cell Broadcast have distinct alert categories or levels, using a message identifier outlined in 3GPP standards. The alert category or level is defined by the severity of the warning, e.g. threat to life, imminent danger or advisory message. Depending on national implementation, users may be able to opt-out of receiving lower level alerts. However, the highest level of alert will usually always be displayed on a user's device. Below is a comparison table on alert categories/levels across systems (based on the common 3GPP message identifiers): When

roaming Roaming is a wireless Wireless communication (or just wireless, when the context allows) is the transfer of information (''telecommunication'') between two or more points without the use of an electrical conductor, optical fiber or oth ...

, if the user's home carrier supports Cell Broadcast emergency alerts, alerts will be displayed if the category/level of alert is enabled and equivalent to their home carrier's system. Cell Broadcast messages can use a CAP (

Common Alerting Protocol The Common Alerting Protocol (CAP) is an XML-based data format for exchanging public warnings and emergencies between alerting technologies. CAP allows a warning message to be consistently disseminated simultaneously over many warning systems to m ...

) message as an input as specified by

OASIS (organization) The Organization for the Advancement of Structured Information Standards (OASIS; ) is an Trade association, industry consortium that develops Technical standard, technical standards for information technology. History OASIS was founded under ...

or the

Wireless Emergency Alerts Wireless Emergency Alerts (WEA), formerly known as the Commercial Mobile Alert System (CMAS) and, prior to that, as the Personal Localized Alerting Network (PLAN), is an alerting network in the United States designed to disseminate emergency a ...

(WEA) C-interface protocol, which has been specified jointly by the

Alliance for Telecommunications Industry Solutions The Alliance for Telecommunications Industry Solutions (ATIS) is a standards organization that develops technical and operational standards and solutions for the ICT industry, headquartered in Washington, D.C. The organization is accredited by the ...

(ATIS) and the

Telecommunications Industry Association The Telecommunications Industry Association (TIA) is accredited by the American National Standards Institute (ANSI) to develop voluntary, consensus-based industry standards for a wide variety of information and communication technology (Informat ...

(TIA). Advantages of using Cell Broadcast for Public warning are: * Sending out a Cell Broadcast message to a few or millions of people takes less than 10 seconds * Cell Broadcast has a unique and dedicated ringtone and vibration * Only an authorized authority and the serving mobile network are able to send out the Cell Broadcast messages * 99% of all handsets used today support Cell Broadcast * Cell Broadcast supports a maximum message length of 1395 characters in the Latin alphabet, and 615 characters in

Universal Coded Character Set The Universal Coded Character Set (UCS, Unicode) is a standard set of character (computing), characters defined by the international standard International Organization for Standardization, ISO/International Electrotechnical Commission, IEC ...

(UCS-2) encoding in order to support other alphabets such as

Arabic Arabic (, , or , ) is a Central Semitic languages, Central Semitic language of the Afroasiatic languages, Afroasiatic language family spoken primarily in the Arab world. The International Organization for Standardization (ISO) assigns lang ...

Chinese Chinese may refer to: * Something related to China * Chinese people, people identified with China, through nationality, citizenship, and/or ethnicity **Han Chinese, East Asian ethnic group native to China. **'' Zhonghua minzu'', the supra-ethnic ...

Urdu Urdu (; , , ) is an Indo-Aryan languages, Indo-Aryan language spoken chiefly in South Asia. It is the Languages of Pakistan, national language and ''lingua franca'' of Pakistan. In India, it is an Eighth Schedule to the Constitution of Indi ...

, or

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

. * Cell Broadcast supports multiple languages * Cell Broadcast supports the use of

URL A uniform resource locator (URL), colloquially known as an address on the Web, is a reference to a resource that specifies its location on a computer network and a mechanism for retrieving it. A URL is a specific type of Uniform Resource Identi ...

s and Web-links in the alert message * Cell Broadcast supports targeting a specific geographic area (

); only devices connected to a

base station Base station (or base radio station, BS) is – according to the International Telecommunication Union's (ITU) Radio Regulations (RR) – a " land station in the land mobile service." A base station is called '' node B'' in 3G, '' eNB'' in L ...

in that area will receive the message * Cell Broadcast supports the update within seconds of existing alert messages due to changing hazard situations * Cell Broadcast supports the mechanism to inform and instruct people within seconds in the adjacent hazard areas * Cell Broadcast is able to reach all mobile subscribers including roaming subscribers (in their own language) * Cell Broadcast is not affected by mobile network congestion * Cell Broadcast is not affected by access class barring and or SIM class barring * Cell Broadcast is not affected by any data protection constraints as no personal data (subscriber identity or

MSISDN MSISDN ( ) is a number uniquely identifying a subscription in a Global System for Mobile communications or a Universal Mobile Telecommunications System mobile network. It is the mapping of the telephone number to the subscriber identity module in ...

) is required and used to deliver the message. * Cell Broadcast can be used to address people present in an individual cell sector or large polygons covering a complete city or country. * Cell Broadcast messages can be updated as incident conditions change during an event at the end of an event an all-clear can be given. * Cell Broadcast is suitable for monthly or half yearly national public warning awareness tests * Cell Broadcast enablement in the mobile network has no influence on the battery life of mobile devices

Cell Broadcast adoption rate

A point of criticism in the past on Cell Broadcast was that there was no uniform user experience on all mobile devices in a country. Wireless Emergency Alerts and Government alerts using Cell Broadcast are supported in most models of mobile telephones. Some smart phones have a configuration menu that offer opt-out capabilities for certain public warning severity levels. In case a national civil defence organisation is adopting one of the 3GPP's Public Warning System standards, PWS - also known as CMAS in North America,

in Europe, LAT-Alert in South America, Earthquake and Tsunami Warning System in Japan, each subscriber in that country either making use of the home network or its roaming automatically makes use of the embedded Public warning Cell Broadcast feature present in every

Android (operating system) Android is an operating system based on a modified version of the Linux kernel and other open-source software, open-source software, designed primarily for touchscreen-based mobile devices such as smartphones and tablet computer, tablets. Andr ...

and

iOS Ios, Io or Nio (, ; ; locally Nios, Νιός) is a Greek island in the Cyclades group in the Aegean Sea. Ios is a hilly island with cliffs down to the sea on most sides. It is situated halfway between Naxos and Santorini. It is about long an ...

mobile device. * * In countries that have selected Cell Broadcast to transmit public warning messages, up to 99% of the handsets receive the cell broadcast message (reaching between 85 and 95% of the entire population as not all people have a mobile phone) within seconds after the government authorities have submitted the message; see as examples

Emergency Mobile Alert Emergency Mobile Alerts (EMA) is an alerting network in New Zealand designed to disseminate emergency alerts to mobile devices. Emergency Mobile Alerts are messages about emergencies sent by New Zealand authorised emergency agencies to capable mo ...

(New Zealand),

(USA) and

NL-Alert NL-Alert is a Cell Broadcast alarm system in use by the Dutch government to quickly alert and inform citizens of hazardous or crisis situations. Using this system, authorities can send messages to users of mobile phones in specific areas by using ...

(Netherlands).

Public warning implementations

Wireless Emergency Alert - Tornado Warning

Many countries and regions have implemented location-based alert systems based on cell broadcast. The alert messages to the population, already broadcast by various media, are relayed over the mobile network using cell broadcast. *

Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...

- AT-Alert *

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

- Defesa Civil Alerta *

Bulgaria Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...

- BG-ALERT *

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

Alert Ready The National Public Alerting System (NPAS; ), branded as Alert Ready (), is the national warning system in Canada, broadcast to Canadian television, radio, and wireless devices. The system consists of infrastructure and standards for the presen ...

Chile Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes, Andes Mountains and the Paci ...

- Sistema de Alerta de Emergencias (SAE) *

Croatia Croatia, officially the Republic of Croatia, is a country in Central Europe, Central and Southeast Europe, on the coast of the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herze ...

Denmark Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ...

- S!RENEN () *

European Union The European Union (EU) is a supranational union, supranational political union, political and economic union of Member state of the European Union, member states that are Geography of the European Union, located primarily in Europe. The u ...

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

FR-Alert FR-Alert is a national emergency population warning system in France using cell broadcast technology. It is used by French authorities (prefects or mayors) to quickly alert and inform the public via mobile phones in case of an imminent or ongoing ma ...

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

- DE-Alert (MoWaS) *

Greece Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...

- GR-Alert *

Hong Kong Hong Kong)., Legally Hong Kong, China in international treaties and organizations. is a special administrative region of China. With 7.5 million residents in a territory, Hong Kong is the fourth most densely populated region in the wor ...

- emergency alert system (EAS) first used on 9 March 2022. *

Iran Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...

Israel Israel, officially the State of Israel, is a country in West Asia. It Borders of Israel, shares borders with Lebanon to the north, Syria to the north-east, Jordan to the east, Egypt to the south-west, and the Mediterranean Sea to the west. Isr ...

- "" *

Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...

- IT-Alert *

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

J-Alert J-Alert (; full name ) is the early warning system used in Japan. J-Alert was launched in February 2007. The system is designed to quickly inform the public of threats and emergencies such as earthquakes, severe weather, and other dangers. The s ...

Lithuania Lithuania, officially the Republic of Lithuania, is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea, bordered by Latvia to the north, Belarus to the east and south, P ...

- LT-Alert *

Luxembourg Luxembourg, officially the Grand Duchy of Luxembourg, is a landlocked country in Western Europe. It is bordered by Belgium to the west and north, Germany to the east, and France on the south. Its capital and most populous city, Luxembour ...

- LU-Alert *

Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...

New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...

Norway Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of the Kingdom of ...

- Nødvarsel *

Oman Oman, officially the Sultanate of Oman, is a country located on the southeastern coast of the Arabian Peninsula in West Asia and the Middle East. It shares land borders with Saudi Arabia, the United Arab Emirates, and Yemen. Oman’s coastline ...

- Oman-Alert *

Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...

Emergency Cell Broadcast System Emergency Cell Broadcast System (ECBS) is an alert broadcast system in the Philippines, designed to disseminate emergency alerts and warnings to mobile devices via cell broadcast services (CBS) Telecommunications companies and the National Disast ...

(ECBS) *

Romania Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...

- RO-ALERT *

Saudi Arabia Saudi Arabia, officially the Kingdom of Saudi Arabia (KSA), is a country in West Asia. Located in the centre of the Middle East, it covers the bulk of the Arabian Peninsula and has a land area of about , making it the List of Asian countries ...

- KSA-Alert *

South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia. It constitutes the southern half of the Korea, Korean Peninsula and borders North Korea along the Korean Demilitarized Zone, with the Yellow Sea to the west and t ...

- Korean Public Alert Service (used daily for regional COVID numbers and additionally almost daily for example to inform about the temporary closure of a

metro Metro may refer to: Geography * Metro City (Indonesia), a city in Indonesia * A metropolitan area, the populated region including and surrounding an urban center Public transport * Rapid transit, a passenger railway in an urban area with high ...

line,

missing people Missing People (previously known as National Missing Persons Helpline) is a national organisation in the United Kingdom that offers assistance to people who run away and/or go missing and their families. It is a registered charity under Englis ...

or cold weather) *

Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...

- ES-Alert *

Sri Lanka Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, also known historically as Ceylon, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, separated from the Indian subcontinent, ...

- Disaster and Emergency Warning Network (DEWN) *

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia. The main geography of Taiwan, island of Taiwan, also known as ''Formosa'', lies between the East China Sea, East and South China Seas in the northwestern Pacific Ocea ...

- *

Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...

- TH-Alert from Department of Disaster Prevention and Mitigation (DDPM) *

Turkey Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia (country), Georgia, Armen ...

- UYARSİS *

United Arab Emirates The United Arab Emirates (UAE), or simply the Emirates, is a country in West Asia, in the Middle East, at the eastern end of the Arabian Peninsula. It is a Federal monarchy, federal elective monarchy made up of Emirates of the United Arab E ...

- UAE-Alert *

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

UK Emergency Alert System The United Kingdom's mobile phone alert system is a emergency population warning, public population warning system that uses Cell Broadcast technology. The warning system is intended for use in major incidents such as flooding or terror attacks. ...

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

Countries in the process of implementation

The following countries and regions have selected Cell Broadcast to use for their national public warning system but are currently in the process of implementing. *

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

Emergency Alert Australia The National Messaging System (NMS) is an upcoming Australian cell broadcast emergency population warning system that is slated to replace the current location-targeted, SMS-based Emergency Alert An emergency is an urgent, unexpected, and u ...

, scheduled for 2025. *

- Defesa Civil Alerta, already implemented at the South and Southeast regions. *

Czech Republic The Czech Republic, also known as Czechia, and historically known as Bohemia, is a landlocked country in Central Europe. The country is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the south ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

- currently being tested *

Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

- currently being tested *

Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...

Portugal Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ...

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

Slovenia Slovenia, officially the Republic of Slovenia, is a country in Central Europe. It borders Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and a short (46.6 km) coastline within the Adriati ...

Sweden Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...

- SE Alert at some point after January 2026 *

- TH-Alert from Department of Disaster Prevention and Mitigation (DDPM) *

Ukraine Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...

- currently being tested

References

External links

3GPP - The current standardization body for GSM with free standards available
* ttps://www.3gpp.org/DynaReport/25419.htm 3GPP TS 25.419 UTRAN Iu-BC interface: Service Area Broadcast Protocol (SABP)br>3GPP TS 44.012 Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface
* ttps://www.3gpp.org/ftp/Specs/html-info/48049.htm 3GPP TS 48.049 BSC-CBC interface specification; Cell Broadcast Service Protocol (CBSP)br>3GPP TS 29.168 Cell Broadcast Centre interfaces with the Evolved Packet Core; Stage 3
{{Cell Broadcast System Mobile telecommunications standards 3GPP standards Emergency population warning systems Emergency communication