Patent Description:
In the state of the art, public warning systems are known that are used to warn the public concerning a certain danger, for instance natural disasters like earthquakes, floods, thunderstorms, firestorms and similar.

In general, public warning systems should alert and inform all citizens that are threatened by the danger with the purpose of enabling them to prepare and to act in a timely manner to reduce the impact of the danger. This implies that the systems applied for public warning must alert the people, but also provide them sufficient information in an understandable manner. The effectiveness of public warning systems to achieve this goal is highly dependent on the communication channels used, as different communication systems have uneven capabilities to fulfill all public warning requirements and diversity is required to reach the maximum of people at risk. Those public warning systems are also called civilian warning systems, as they are used to warn the civilization appropriately with respect to an upcoming danger.

The public warning systems known typically comprise alarm sirens for civil protection, namely electronic sirens. The respective sirens output a characteristic audio signal to warn the civilization concerning the future danger. Despite the sirens, it is also known that the public warning systems comprise warning lights, e.g. in addition to the sirens, which output an optical signal for warning the civilization concerning the upcoming danger.

However, it has turned out that the public becomes only aware of a certain danger due to the activation of the respective sirens and/or warning lights, but the people do not know what particular kind of danger is to be expected. Therefore, it is not clear to the people how to react correctly with regard to the upcoming danger. Hence, the known public warning systems do not effectively lead to proper reactions of the people. Therefore, the warnings are not effective as the people do not know how to properly react, which is also caused by the nescience about the kind of future danger.

In order to overcome this issue, it is also known to use regular internet services that require software applications to be installed on smartphones or similar devices such that the subscribers of the respective internet services may obtain further information via the applications on their smartphones. However, these regular internet services require internet access of the respective smartphones, which may not be guaranteed in case of a catastrophic situation, e.g. due to a blackout affecting the regular mobile network infrastructure used for the regular internet services.

<CIT>, <CIT>, and <CIT> disclose generic systems and methods for wireless communication, partially relating emergency messages.

Therefore, there is a need for an efficient and fail-safe public warning system that ensures appropriate warning of the civilization in case of danger.

The objective technical problem to be solved may be considered to consist in overcoming or at least reducing the disadvantages according to the prior art.

The problem is solved by the subject matter of the independent claims.

The invention provides a public warning system for broadcasting content, wherein the public warning system comprises a <NUM>-based or LTE-based broadcast infrastructure configured to broadcast content to all users in a coverage area of the broadcast infrastructure. The public warning system comprises a cell broadcast entity configured to provide a warning text message to be broadcasted by means of the broadcast infrastructure. The public warning system also comprises a content provider entity configured to provide an additional content. The public warning system further comprises a broadcast core entity that is configured to process and combine the warning text message with information of the additional content provided by the content provider entity, thereby generating an enriched warning text message. The broadcast core entity is configured to forward the enriched warning text message to the broadcast infrastructure such that the broadcast infrastructure is enabled to broadcast the enriched warning text message.

The main idea of the invention is to enhance the respective text of a regular warning text message with information concerning the additional content, thereby providing additional information such that all users in the respective coverage area of the broadcasting area are enabled to obtain further valuable information. The additional content may be used to provide instructions to the users or rather further information what specific danger is upcoming.

The users may correspond to mobile users that are located in the coverage area of the broadcasting infrastructure irrespective thereof if the users are subscribers to a certain (internet) service or not. Hence, all available users in the coverage area are informed automatically due to the cell broadcasting provided by the public warning system, as the messages are broadcasted to multiple users, e.g. mobile telephone users, in the coverage area at the same time.

The messages broadcasted may relate to short messages of a short message service (SMS). Put differently, the public warning system comprises a cell broadcast (CB) service, which is also known as Short Message Service-Cell Broadcast (SMS-CB) or Cell Broadcast Short Message Service (CB SMS).

Generally, the (cell) broadcasting differs to typical short message services in that (cell) broadcasting concerns a one-to-many geo-targeted and geo-fenced messaging service rather than a point-to-point messaging service. This is achieved by directing the messages to be broadcasted to radio cells (transmitters) rather than to a user entity, e.g. a user end device like a mobile, a smartphone, a tablet or similar.

In other words, the public warning system comprises a cell broadcast system (CBS) that is generally enabled to broadcast the respective messages to all users located in the coverage area of the broadcasting infrastructure by using several cells, e.g. up to <NUM> million cells in less than <NUM> seconds, thereby reaching millions of users.

According to another example, the broadcasting infrastructure may have a cost-effectively single High-Power High Tower (HPHT) transmitter may be used that covers a metropolitan region with millions of users.

Generally, the broadcasting infrastructure may comprise at least one redundant transmitter as fallback option in case of failure of the intended transmitter.

Accordingly, the civilization can be warned by means of text messages that use the cell broadcast system (CBS) based on a cost-effective and reliable manner LTE-based or rather <NUM>-based broadcast infrastructure that comprises respective transmitters, namely LTE- or <NUM>-based transmitters.

As mentioned above, the respective broadcast infrastructure uses the cell broadcast system (CBS) to reach a large number of users in the affected area. The respective users do not only receive the warning text message, but also at least information concerning the additional content that may be provided by a separate entity, namely the content provider entity. Hence, further information about the respective emergency situation can be provided so as to warn the civilization more effectively rather than only the text provided by the cell broadcast entity.

In general, the public warning system may be fail-safe so as to ensure that the public warning system is still active in case of a blackout. Actually, the <NUM>-based or LTE-based broadcast infrastructure of the public warning system corresponds to an additional infrastructure with respect to a regular network infrastructure used for regular internet services. The regular network infrastructure might be partially or even completely down due to the respective circumstances that come together with the danger, for instance bad weather or other catastrophic conditions like flood and/or thunderstorms.

In other words, the broadcast infrastructure for transmitting the respective messages is still working even though a parallel mobile network infrastructure for regular internet services has broken down. Obviously, the broadcast infrastructure of the public warning system is operated in parallel with the regular network infrastructure used for the regular services. In any case, the broadcast infrastructure of the mobile network ensures that content is broadcasted to all users in the coverage area in contrast to services of a regular mobile network infrastructure that is limited to the respective subscribers of the service.

In general, a <NUM>-based or LTE-based network may be provided that comprises the <NUM>-based or LTE-based broadcast infrastructure (broadcast network) for broadcasting the (enriched) warning text messages as well as the regular mobile network infrastructure used for regular internet services.

Contrary to the regular network infrastructure, the broadcast infrastructure relates to a unidirectional transmission, as the messages are only broadcasted without receiving any feedback via an uplink channel or similar.

An aspect provides that the enriched warning text message comprises a link to the additional content. Particularly, the link provided in the enriched warning text message directs a user to a web page. The respective content may be provided by the at least one content provider entity, wherein the users receiving the link by means of the enriched warning text message can use the link for receiving further information, namely the additional content.

Since the link is broadcasted, the respective link corresponds to a broadcast link. Hence, the broadcast link sent will be received by all users in the respective coverage area. The link may be made by a uniform resource locator (URL) scheme that is compact and short.

Another aspect provides that the additional content relates to video content, audio content, and/or data content, particularly a behavioral recommendation and/or a live video. The warning text message may comprise a link to the respective video, audio and/or data such that the user is enabled to receive the respective information appropriately. The user may read the text of the message broadcasted while being enabled to click on the link for receiving the additional content, e.g. via the same broadcast channel, namely the same frequency band. Hence, no additional (mobile) network or uplink channel is required for receiving the additional content.

The additional content (if activated, e.g. by clicking the link) is also broadcasted via the broadcast infrastructure rather than via a mobile network used for regular internet services.

For instance, the video may be started when clicking on the link, the audio may be played when clicking on the link or rather a data file may be downloaded when clicking on the link. The respective content may be broadcasted via the same broadcast channel used for broadcasting the messages. Further, a web browser on the respective end device may be opened so as to retrieve the additional content via the web browser.

As mentioned above, the respective additional content may be broadcasted over the same broadcast channel, thereby improving the overall reliability and functionality of the public warning system, as no uplink channel and/or additional network is required for obtaining the content.

Generally, the respective warning text messages, particularly the enriched warning text messages, may be broadcasted repetitively such that new users entering the coverage area of the broadcast infrastructure will automatically receive the respective information, namely the enriched warning text messages.

Furthermore, the respective content submitted by means of the (enriched) warning text messages can be updated on a regular basis, particularly the respective links and/or the content provided by the respective links.

In fact, the warning text messages and the additional content, namely the enriched warning text messages, are broadcasted by the same radio station, particularly the same evolved nodeB (eNB), such that no additional mobile network or upload/uplink channel is required.

Accordingly, a single, particularly high power, transmitter can be used in order to reach an undetermined number of users in the respective coverage area so as to forward the enriched warning text messages in order to warn the civilization.

Further, the content provider entity may be associated with a television station, a broadcasting company, civil protection, a fire department and/or a police department. Hence, an alerting authority, also called originator, may generate the additional content to provide this additional content for being broadcasted to all users in the coverage area of the broadcasting infrastructure. Of course, other (warning) authorities may also provide the respective additional content in addition to the text of the warning text messages that is provided by the cell broadcast core (CBE).

Another aspect provides that the public warning system has an operator interface via which the text of the warning text message is adaptable. Therefore, the text of the warning text message can be adapted, which is broadcasted, so as to react on changing circumstances, for instance a different area affected by the respective danger.

A further aspect provides that the broadcast core entity is configured to process different content of several content provider entities. Particularly, the broadcast core entity is configured to combine information about the different content with the warning text message. The content associated with a link transmitted by means of the enriched warning text message can be adapted even though the link remains the same such that updated information, particularly updated additional content, can be broadcasted. Alternatively or additionally, the link encompassed in the enriched warning text message can be adapted as well in order to ensure that the users directly recognize that the respective additional content may have been changed due to a different link submitted. The users will be motivated to click the updated link.

Hence, the link included into the text of the text warning messages may be used like a wildcard, which might be modified over time.

Generally, multiple warning text messages, e.g. the respective texts of these messages, as well as different content of several content provider entities can be provided which are processed by the broadcast core entity (BCE). For instance, the text may be provided in multiple languages. The text of a certain language may be combined by means of the broadcast core entity with a dedicated content.

The respective content may be broadcasted in one or more broadcast session(s) that is/are set up before sending the warning text messages. The broadcast core entity combines the warning text messages with the content provided, thereby generating the enriched warning text messages that are broadcasted by means of the broadcast infrastructure.

Hence, the additional content can be stopped independently from the warning text messages. The respective stop may be initiated by the content provider entity and/or the broadcast core entity, for instance before stopping broadcasting the warning text messages, with stopping broadcasting the warning text messages, and/or after stopping broadcasting the warning text messages.

In addition, the broadcast core entity may be configured to include data associated with geographical information of the geographical area affected into the enriched warning text message. Thus, data not directly accessible by the user may be broadcasted as well. The respective data associated with the geographical information may be used for warning only users that are located in a certain sub-area of the respective area affected. Hence, unnecessary warnings of users can be avoided that are not directly endangered.

The data associated with geographical information may be used for addressing purposes which takes place in a higher layer of the broadcasting with respect to the message sent.

Moreover, radio stations, namely eNBs, receiving the enriched warning text messages to be broadcasted may be selected based on the data associated with geographical information. Thus, the coverage area of the broadcast infrastructure may be altered.

Particularly, the public warning system comprises at least one user entity that is configured to receive the enriched warning text message. The user entity may relate to a user end device, for instance a smartphone, a mobile, a tablet and/or a television.

Further, the user entity may be configured to process the enriched warning text message received, wherein the user entity is configured to only display the enriched warning text message in case the geolocation of the user entity matches with the geographical information. This ensures that no unnecessary warnings are outputted such that the users will not get used to (unnecessary) warnings. Accordingly, the effectiveness of the public warning system is guaranteed.

During the warning, the messages may be broadcasted to a smaller geographic area or a wider geographic area in order to react on changing circumstances associated with the danger.

Moreover, the broadcast infrastructure comprises at least one transmitter with an emergency power supply, which is configured to transmit the enriched warning text message. The respective transmitter may be located on a specific site in order to ensure to reach as many people as possible in case of an emergency. Furthermore, the transmitter is independent of the power grid so that the enriched warning messages can still be broadcasted even though the power grid failed, for instance due to a blackout. For instance, the broadcast infrastructure comprises at least one radio station that is located on an exposed position, e.g. on top of a hill. Further, the respective radio station may be powered by means of an emergency power supply such that the messages can still be broadcasted by the broadcast infrastructure even if the regular network infrastructure would not work anymore.

Further, the invention provides a method of broadcasting content by means of a public warning system. The method comprises the steps of:.

Accordingly, it is ensured that the additional content is broadcasted together with the waring text message by means of the enriched text warning messages so that all users in the respective area affected can be warned while simultaneously providing the additional valuable information associated with the additional content. Hence, the users located in the affected area are enabled to react in a right manner, as they become aware about the specific kind of danger and, optionally, information how to react effectively.

In addition, the information of the additional content may be a link to the additional content. The respective link may be implemented in the text of the enriched warning text message that is broadcasted so that the user is enabled to directly click on the link by means of its user entity, for instance smartphone. Afterwards, the content broadcasted is played or rather downloaded, e.g. video, audio and/or data content.

The text of the warning text message may be adaptable via an operator interface of the public warning system. Therefore, a warning authority or rather an authorized entity is enabled to adapt the respective text to be broadcasted. For instance, a text associated with a certain language may be selected among different texts associated with different languages.

The broadcast core entity may process different content of several content provider entities. Thus, different additional valuable content may be provided simultaneously or rather in a subsequent manner in order to inform/warn the users in a most reliable and effective manner concerning an upcoming danger. For instance, the different content may be provided in an alternating manner, e.g. periodically, thereby ensuring that the users receive different information provided by the different content provider entities.

Furthermore, geographical information concerning a geographical area affected may be included into the enriched warning text message by means of the broadcast core entity. The geographical information may be provided in terms of data that can be processed by the user entity such that only the user entity actually outputs the text of the enriched warning text message in case that their geolocation matches with the geographical information concerning the geographical area affected.

In general, the public warning system may comprise several cell broadcast entities (CBEs) that are connected with the broadcast core entity (BCE), wherein the several cell broadcast entities may provide different warning text messages, e.g. the same text in different languages and/or different texts. The broadcast core entity is enabled to process the different warning text messages received, particularly simultaneously.

As already mentioned above, the public warning system may comprise several content provider entities that are connected with the broadcast core entity, wherein the several content provider entities provide different content. The broadcast core entity is enabled to process the different warning text messages received, particularly simultaneously.

For instance, the broadcast core entity may comprise several cell broadcast cores (CBCs), wherein each of the several cell broadcast cores is configured to generate a dedicated enriched warning text message to be broadcasted by combining a warning text message with a respective additional content. Accordingly, the broadcast core entity is enabled to provide several enriched warning text messages simultaneously, particularly wherein the number of different enriched warning text messages is equal to the number of cell broadcast cores included in the broadcast core entity.

The operator of the content provider entity and the operator of the cell broadcast entity may be different or even the same.

Generally, the additional content may also be directly broadcasted rather than broadcasting the link.

Generally, the term "entity" is understood to describe suitable hardware, suitable software, or a combination of hardware and software that is configured to have a certain functionality.

The hardware may, inter alia, comprise a CPU, a GPU, an FPGA, an ASIC, or other types of electronic circuitry.

It is to be understood that an entity may be established by a single electronic device or even by a portion of a single electronic device. However, an entity may also be established by a plurality of electronic devices that are interconnected, e.g. a network of electronic devices.

Further aspects and many of the attendant advantages of the claimed subject matter will become more readily appreciated, as the same become better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings.

In the drawings, <FIG> schematically shows an overview of a public warning system according to a preferred embodiment of the invention.

For the purposes of the present disclosure, the phrase "at least one of A, B, and C", for example, means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C), including all further possible permutations when greater than three elements are listed.

In <FIG>, a public warning system <NUM> is shown that is also called cell broadcast system (CBS) or civilization warning system.

The public warning system <NUM> comprises at least one cell broadcast entity (CBE) <NUM> that provides a warning text message to be broadcasted in order to warn the civilization with respect to a danger like a natural disaster, particularly a geological disaster, a hydrological disaster, a meteorological disaster or similar.

In the shown embodiment, the public warning system <NUM> also comprises at least one content provider entity <NUM> that provides content to be broadcasted, for instance additional content like video content, audio content and/or data content.

The public warning system <NUM> also comprises a broadcast core entity <NUM> that is connected with the cell broadcast entity <NUM> and the content provider entity <NUM> in a signal transmitting manner such that the broadcast core entity <NUM> is configured to communicate with the cell broadcast entity <NUM> and the content provider entity <NUM>, thereby receiving or at least accessing the warning text message and the additional content.

In addition, the public warning system <NUM> comprises a broadcast infrastructure <NUM> that corresponds to a <NUM>-based broadcast infrastructure or an LTE-based broadcast infrastructure, e.g. a broadcast infrastructure using telecommunication standards according to the fourth and fifth generation.

In the shown embodiment, the respective broadcast infrastructure <NUM> comprises two transmitters <NUM> that are established as radio (base) stations, e.g. evolved NodeBs (eNBs).

Accordingly, the broadcast infrastructure <NUM> is configured to broadcast content to all users in a coverage area of the broadcast infrastructure <NUM> irrespective thereof if the respective users are subscribers to a certain (internet) service or not.

Generally, the broadcast core entity <NUM> is configured to generate a message to be broadcasted by means of the broadcast infrastructure <NUM>.

For instance, the broadcast core entity <NUM> is enabled to combine information about the additional content, particularly the additional content itself, to the warning text message provided by the cell broadcast entity <NUM>, thereby generating the message to be broadcasted which corresponds to an enriched warning text message.

The respective combining is done by at least one session ID, e.g. link session ID.

The link session ID may be part of a link included into the warning text message by means of the broadcast core entity <NUM>. The respective link added to the warning text message corresponds the information of the additional content.

The respective broadcasting of the content can generally start before, at (simultaneously) or after the warning text message has been broadcasted.

The public warning system <NUM> further comprises a management entity <NUM> that is associated with the broadcast core entity <NUM>.

The management entity <NUM> is generally enabled to manage the processing done by the broadcast core entity <NUM> when handling the respective information obtained from the cell broadcast entity <NUM> and the content provider entity <NUM>. Thus, the management entity <NUM> is enabled to control the broadcast core entity <NUM>, e.g. to do settings of the broadcast core entity <NUM>.

For instance, the management entity <NUM> assigns the content to at least one user service, thereby generating the message to be broadcasted by means of the broadcast infrastructure <NUM>. The respective assignment is done at a given point in time. However, the assignment is adaptable at any time by means of the management entity <NUM>.

Hence, the message generated by the broadcast core entity <NUM> can be adapted by means of the management entity <NUM> accordingly.

The management entity <NUM> authorizes the respective content provider entities <NUM> to broadcast the additional content in relation to the session ID.

As mentioned above, the public warning system <NUM> may comprise several authorized content provider entities <NUM> that may provide different content, e.g. video content, audio content, and/or data content, particularly a behavioral recommendation and/or a live video. Hence, the respective content provider entities <NUM> may relate to a television station, a broadcasting company, civil protection, a fire department and/or a police department.

Accordingly, the broadcast core entity <NUM> is enabled to pass the respective additional content to the respective session having a dedicated link session ID, particularly based on the setting done by means of the management entity <NUM>.

In other words, the management entity <NUM> coordinates which content is broadcasted on which session. Hence, the management entity <NUM> is generally enabled to switch the content provided in the messages broadcasted from one source to another source, namely among the different content provider entities <NUM>.

The public warning system <NUM> also comprises an operator interface <NUM> via which access to the management entity <NUM> is enabled. Hence, the processing of the broadcast core entity <NUM> can be adapted via the operator interface <NUM>.

Generally, the access to the management entity <NUM> provided by the operator interface <NUM> may also provide access to the broadcast core entity <NUM> or even the cell broadcast entity <NUM>.

The cell broadcast entity <NUM>, the broadcast core entity <NUM>, and/or the management entity <NUM> may relate to the same authority or different authorities, for instance civil protection, a fire department and/or a police department.

In the shown embodiment, the operator interface <NUM> is provided by the management entity <NUM> itself. Even though the operator interface <NUM> is shown as being part of the management entity <NUM>, the operator interface <NUM> may generally be provided in a separate manner.

Since adaptions of the messages to be broadcasted can be done by means of the operator interface <NUM>, the operator interface <NUM> only grants access to an authority or an authorized entity. Thus, it is avoided that unauthorized users are enabled to adapt the messages.

In other words, network authorization is required to use the operator interface <NUM> for having access to the management entity <NUM> via which adaptions of the processing done by the broadcast core entity <NUM> can be done.

For instance, the operator interface <NUM> may be a Representational State Transfer Application Programming Interface (REST API) such as xMB-C / xMB-U, which requires network authorization.

Moreover, the public warning system <NUM> according to the embodiment shown in <FIG> comprises user entities <NUM> as well as warning devices <NUM>.

The user entities <NUM> may be established by smartphones, mobile phones, tablets and/or televisions.

In contrast thereto, the warning devices <NUM> are typically allowed to be operated by (national) authorities or authorized entities like company authorities provided that the warning devices <NUM> are located at company premises. Hence, the warning devices <NUM> may relate to enterprise resource management entities or rather building management entities.

The respective broadcast infrastructure <NUM> is generally configured to broadcast the respective messages received from the broadcast core entity <NUM> to the user entities <NUM> and the warning devices <NUM> which in turn are enabled to receive the messages and process them accordingly, thereby outputting information.

As mentioned above, the respective messages to be broadcasted by means of the broadcast infrastructure <NUM> are generated by the broadcast core entity <NUM> that is configured to process the different information obtained from the different entities connected thereto, e.g. the warning text messages received via the cell broadcast entities <NUM>, the content received via the different content provider entities <NUM> and/or information/data received from the management entity <NUM>.

According to a first example, the broadcast core entity <NUM> is enabled to receive and process the warning text message provided by the at least one cell broadcast entity <NUM> and the additional content provided by the at least one content provider entity <NUM> so as to generate the at least one enriched warning text message to be broadcasted.

Generally, several warning text messages and several additional contents may be processed simultaneously by the broadcast core entity <NUM>, thereby generating several enriched warning text messages simultaneously. Particularly, these several enriched warning text messages are broadcasted by means of different cells, e.g. different parts of the broadcasting infrastructure <NUM>.

For this purpose, the broadcast core entity <NUM> may comprise several cell broadcast cores <NUM> as indicated in <FIG>.

The enriched warning text message(s) generated may comprise the text of the warning text message, which is enriched by the broadcasting link to the respective content.

Further, the broadcast core entity <NUM> is configured to forward the enriched warning text message(s) generated to the broadcast infrastructure <NUM> such that the broadcast infrastructure <NUM> is enabled to broadcast the enriched warning text message(s) to the user entities <NUM>.

The user entities <NUM> are enabled to receive the enriched warning text messages, wherein the text of the warning text message may be displayed on the user entities <NUM>. In addition, the link to the additional content may be displayed so that a user of the respective user entities <NUM> is enabled to click on the link in order to obtain the additional content, e.g. video content, audio content and/or data content.

For instance, the user may be directed to a web page on its user entity <NUM> when clicking on the respective link that is comprised in the text of the enriched warning text message processed by the user entity <NUM>.

Generally, the additional content may encompass live information like a live video or behavioral recommendations so that the user is informed how to react probably due to the respective circumstances of the future danger.

In addition, the broadcast core entity <NUM> may include data associated with geographical information of a geographical area affected into the enriched warning text message to be broadcasted when generating the respective message.

The additional information included may not be directly visible to the user of the user entities <NUM>, but it is encompassed in the respective enriched warning text message such that the user entities <NUM> have access to the corresponding data when processing the enriched warning text message received.

The user entities <NUM> may process the enriched warning text messages received, wherein the user entities <NUM> only display the text of the respective warning text messages and the link or rather the additional content directly in case the geolocation of the user entity <NUM> matches with the geographical information that has been included by means of the broadcast core entity <NUM> previously.

Accordingly, a geo-targeted and geo-fenced messaging is enabled by the broadcasting service of the public warning system <NUM>.

Therefore, it is ensured that only a certain subset of all users in the respective coverage area of the broadcast infrastructure <NUM> is warned actively in case these users are effectively exposed to the critical situation. Superfluous warnings of users not endangered can be avoided effectively such that those users do not get used to unnecessary warnings.

Further, the public warning system <NUM> ensures that the text of the warning text message can be adapted appropriately such that updated information concerning the respective circumstances can be broadcasted. Therefore, the operator interface <NUM> may be used such that an authority or an authorized entity is enabled to adapt the text of the respective warning text message to be displayed on the user entities <NUM>.

The respective transmitters <NUM> may comprise an emergency power supply <NUM> which ensures that the transmitters <NUM> are still operable even though a power grid has broken down, which affects the regular network infrastructure used for regular internet services.

Furthermore, the entire broadcast infrastructure <NUM> is an additional one to the regular network infrastructure. This ensures that the messages to be broadcasted can be still broadcasted even though the remaining mobile network has broken down.

The broadcast core entity <NUM> ensures that the content provided by the different content provider entities <NUM>, which shall be broadcasted to the users, is assigned to at least one user service, thereby generating the message to be broadcasted by the broadcast infrastructure <NUM>.

The user service may relate to a temporary mobile group identifier (TMGI) such that the management entity <NUM> authorize different content provider entities <NUM> to broadcast the additional content.

The broadcast core entity <NUM> receives the different additional content from the several content provider entities <NUM>, wherein the broadcast core entity <NUM> is enabled to pass the respective additional content to the respective session with the associated session ID. The management entity <NUM> therefore coordinates which additional content is broadcasted on which session. Thus, it is possible to switch between the respective contents of the different content provider entities <NUM>.

In general, the operator interface <NUM> allows to adapt the respective assignment of the data to be broadcasted to the at least one user session based on the ID as mentioned above. Therefore, the respective additional content to be broadcasted with the warning text message can be adapted by means of the management entity <NUM>.

In general, the management entity <NUM> assigns the content to be broadcasted to the at least one user service at a given point in time, wherein the respective assignment can be adapted at any time via the operator interface <NUM>.

The assignment of the data to be broadcasted to the at least one user service may depend on a respective condition, for instance a geographical area affected. The respective assignment can be adapted manually via the operator interface <NUM> or rather automatically based on data associated with geographical information.

For instance, the management entity <NUM> is enabled to adapt the assignment of the content to the at least one user service such that the message is broadcasted to a smaller geographic area or a wider geographic area. This means that the data associated with the geographic information concerning the geographical area affected is altered accordingly.

As mentioned above, the user entities <NUM> that receive the enriched waring text messages will output the respective information only in case their geolocation matches with the geographic information submitted by means of the enriched warning text messages in order to avoid false warnings.

Furthermore, the broadcast core entity <NUM> is also configured to generate a message to be broadcasted by means of the broadcasting infrastructure <NUM> to the warning devices <NUM>.

For this purpose, the broadcast core entity <NUM> receives data from the management entity <NUM> to be included into the message to be broadcasted.

In fact, the management entity <NUM> assigns at least one device control command for controlling the warning devices <NUM> to the message to be broadcasted via at least one user service, e.g. a specific warning device service. Thus, the broadcast core entity <NUM> enriches the message to be broadcasted with data associated with the at least one device control command. The respective data may be encrypted, thereby ensuring data security.

The respective user service has a dedicated service class identifying itself as the warning device service so that the respective warning devices <NUM> receive the information concerning the service class.

All warning devices <NUM> in the coverage area of the broadcast infrastructure <NUM> receive the respective user service by means of a <NUM>-based or LTE-based broadcast receiver associated with the respective warning devices <NUM>.

An optional middleware or application software running on the warning devices <NUM> detects the respective data contained in the enriched message broadcasted, which comprises the at least one device control command, namely the control information about their respective behavior. In case the data is encrypted, the warning devices <NUM> are also enabled to decrypt the encrypted data so as to access the content of the data, namely the at least one device control command.

The respective message broadcasted may be associated with the warning device service that contains a file download session with at least one encrypted file so that the warning devices <NUM> receiving the respective messages broadcasted start a file download in order to receive the encrypted data. The encrypted data is decrypted by means of the warning devices <NUM> themselves in order to obtain the device control command and process the device control command respectively.

In addition, the warning devices <NUM> may be configured to be waked up by the message received in oder to enter an active operational state in which the respective data of the message are decrypted accordingly for being processed further. Thus, the broadcast infrastructure <NUM> is enabled to wake up the different warning devices <NUM> in its coverage area accordingly.

Alternatively or additionally, the warning devices <NUM> may also be waked up by means of the (enriched) warning text messages broadcasted by the broadcast infrastructure <NUM>, namely the CB-warning messages as indicated in <FIG>.

Once the warning devices <NUM> have been waked up, the warning devices <NUM> are enabled to receive and process the messages associated with the file download session so as to download and decrypt the data containing the at least one device control command.

Furthermore, the broadcast core entity <NUM> may enrich the message to be broadcasted with data associated with geographical information of a geographical area affected. The respective warning devices <NUM> may receive and process the message broadcasted, wherein the warning devices <NUM> only process the message in case the geolocation of the warning device <NUM> matches with the geographical information.

The operator interface <NUM> may grant access to the management entity <NUM> so as to adapt the respective assignment of the device control command for controlling the respective warning devices <NUM> to the message to be broadcasted. The operator interface <NUM> may only grant access to an authority or an authorized entity.

Further, the message broadcasted may comprise at least one unique ID of a dedicated warning device <NUM> such that only the dedicated warning device <NUM> is addressed in the coverage area of the broadcast infrastructure <NUM>. Thus, it is ensured that only a certain number, particularly defined warning devices <NUM>, are controlled in the respective manner in order to warn only a certain critical infrastructure, for instance a certain sub-area of the entire coverage area of the broadcast infrastructure <NUM>.

The management entity <NUM> is enabled to adapt the assignment of the device control command to the message to be broadcasted such that the message is broadcasted to a smaller geographic area or wider geographic area, thereby adapting the number of warning devices <NUM> to be controlled accordingly. Again, this ensures that superfluous or unnecessary warnings are omitted effectively.

Generally, an effective and informative public warning system <NUM> is provided that ensures that the civilization is warned and informed appropriately concerning any upcoming dangers.

Certain embodiments disclosed herein, particularly the respective entities, utilize circuitry (e.g., one or more circuits) in order to implement standards, protocols, methodologies or technologies disclosed herein, operably couple two or more components, generate information, process information, analyze information, generate signals, encode/decode signals, convert signals, transmit and/or receive signals, control other devices, etc. Circuitry of any type can be used.

Claim 1:
A public warning system (<NUM>) for broadcasting content, wherein the public warning system (<NUM>) comprises a <NUM>-based or LTE-based broadcast infrastructure (<NUM>) configured to broadcast content to all users in a coverage area of the broadcast infrastructure (<NUM>), wherein the public warning system (<NUM>) comprises a cell broadcast entity (<NUM>) configured to provide a warning text message to be broadcasted by means of the broadcast infrastructure (<NUM>), wherein the public warning system (<NUM>) comprises a content provider entity (<NUM>) configured to provide an additional content, wherein the public warning system (<NUM>) comprises a broadcast core entity (<NUM>) that is configured to process and combine the warning text message with information of the additional content provided by the content provider entity (<NUM>), thereby generating an enriched warning text message, and wherein the broadcast core entity (<NUM>) is configured to forward the enriched warning text message to the broadcast infrastructure (<NUM>) such that the broadcast infrastructure (<NUM>) is enabled to broadcast the enriched warning text message,
the public warning system (<NUM>) being characterized in that the broadcast infrastructure (<NUM>) comprises at least one transmitter (<NUM>) having an emergency power supply (<NUM>), the transmitter (<NUM>) being configured to transmit the enriched warning text message, wherein the at least one transmitter (<NUM>) is independent from a power grid,
wherein the broadcast infrastructure (<NUM>) is different from a mobile network infrastructure for regular internet services,
wherein the combining of the warning text message with information of the additional content provided by the content provider entity (<NUM>) performed by the broadcast core entity (<NUM>) is done by at least one session ID,
and wherein the public warning system (<NUM>) comprises a management entity (<NUM>) configured to authorize a respective content provider entity (<NUM>) to broadcast additional content in relation to the session ID.