The present invention relates to an information system, in particular
a warning system for transmission
of messages from a central transmitting device to a
Variety of communication devices,
the messaging preferably
with the help of a satellite. In addition, the present concerns
Invention a method for preferably satellite-based transmission
from messages to communication devices.
Development of information or warning systems has due to the
lately more often
natural catastrophes increasingly gaining importance.
It has been found that the problem with the occurrence
of natural disasters was not primarily that the
Dangers would not have been recognized.
Rather would have
The number of victims can be significantly reduced if the opportunity
would have existed
persons threatened by the danger as extensively and early as possible
to warn people of impending dangers are accordingly
interpreted in such a way that a large number of people at the same time
can be informed. For this offers
Accordingly, the use of satellites as transmitting devices
because even with a small number of satellites a global
Cover can be achieved and accordingly many people
can be informed at the same time.
However, existing mobile networks still do not offer
To disseminate information.
one side would be
thus the use of satellites for the transmission of information or
Warnings are desirable
on the other hand, the problem then is that
also persons who receive information or warnings for which they
Information is not relevant as it is from the upcoming
For example, risk is not affected at all. In the case
however, that people have been constantly warning for a long time
have received that for
they are of no importance, there is a risk that ultimately
relevant warning message is disregarded.
The present invention is accordingly based on the object
to indicate a possibility
as targeted as possible within a global warning system
To address persons who are actually affected by an imminent danger
We abandon the task specified in the independent claims
Advantageous developments of the invention are the subject of the dependent claims.
The present invention is to provide means by
which in a sense
a pre-filtering of the warning information can be done so that the
Users of the communication devices
Finally, only those information displayed or
be put for this
are also relevant with high probability.
Accordingly, according to the invention
Information system for transmission
of messages from a central transmitting device, in particular
a satellite, proposed to a variety of communication devices,
wherein data transmitted by the central transmitting device in addition to the
actual message contain additional information, which has a local
and / or user-specific relevance of messages,
and wherein each communication device first checks the evaluation of the additional information, if the
the respective communication device
are relevant and dependent
from this review the
Processes or reproduces messages.
Also according to the invention
a communication device
proposed for use in an appropriate information system,
which receiving means for receiving data comprises the messages
as well as additional information, which has a local and / or user-specific relevance
give the news information. Furthermore, the communication device has evaluation means,
based on the additional information, whether the messages are relevant for the communication device
or not, as well as processing means for processing
or reproducing the messages depending on the result of the check
the evaluation on.
The solution according to the invention allows due to the possibility of prefiltering or pre-checking the incoming messages in particular the use of satellites as transmitting devices, since of the many receivers that can actually receive the satellite signal, ultimately only those devices play the news, which automatically The review concluded that the information is relevant to the user. This provides a very effective system for communicating warning information which ensures that only those who are actually affected are warned in a timely and timely manner.
Additional information can
in particular define a geographical area for which the
Messages are relevant. For example, the geographical area can be
are defined by multiple locations that include the area. For this offers
It is these places, for example, by a reference position
and specify a plurality of relative positions, in particular the
Accuracy of position information for the different positions
can be different. Usually
is here provided that the reference position with a higher accuracy
is given as the relative positions, reducing the amount of
to be transmitted
the indication of the area affected by a warning message
Deciding if a communication device is within an affected one
Can then be made on the basis of supplementary data,
be put. This could be
it may be, for example, navigation data, which with the help
a communication device
assigned or in this integrated navigation receiver can be determined.
Also, the manual specification of the current location by a user
of the communication device
would be possible.
would be too
a (rough) localization about
the cell information of a mobile network conceivable.
Regard to the consideration
the user-specific information can also be predetermined,
that is manually set by a user of the device,
which types of warning information the device will respond to in an appropriate manner
should. For example, you can
different categories of use cases are defined, where
then determined according to a corresponding scheme in which
an information is reproduced or not.
Another advantageous embodiment of the invention relates to measures
which ensure that
also inside of closed buildings devices the information
can still receive.
For example, if a satellite is used as a central transmitting device,
that's usually enough
used transmit power usually for receiving the signals within
of closed buildings
not from. The reason is
in that the signals are usually exclusively through reflections in the environment
located objects to the receiver and accordingly
the final incoming signals for a clear evaluation
To overcome this problem is, according to the advantageous development
the invention provides that the from the satellite to the or
communicated the communication equipment
Data includes the text information - ie, for example, the warning message - including
Information share and a co-ordination share, which
Coordination portion of the communication device for synchronization to the
Satellite is used. The text information containing
Data is then transmitted by the satellite at least twice,
the communication device
received information shares in-phase summed and from the
In this case formed sum signal determines the text information.
By the repeated transmission
information and that made possible by means of the co-ordination component
In-phase aggregation of the information shares can then ultimately
be formed a sum signal which is strong enough for a unique
and error-free evaluation of the information is. Also the reception
the information within closed buildings is made possible in this way.
It is not even the regular or periodic repeating
the data transmission required,
since the co-ordination component can also be used to - preferably subsequent
Uniquely identify textual information. The application possibility
In the context of a global warning system, this makes it clear
as well as very simple devices
used as a receiver
connected to a receiving device outside of buildings
have to be.
Thus, the present invention is an information system
for providing messages, in particular warning information
which ensures that even only those
Users of terminals about upcoming
Dangers are informed that are actually affected. The
such a system is significantly increased in this way.
the invention will be explained in more detail with reference to the accompanying drawings.
1 schematically the components of an information or warning system according to the invention;
2 the structure of a global warning message;
3 the procedure for defining an area for which a submitted alert message is relevant; and
4 a diagram illustrating the procedure for receiving information within a closed building.
1 shows first schematically the components of a generally with the reference numeral 1 provided communication system according to the invention, which can be used in particular for the realization of a global emergency call / warning system.
The central office of the emergency call / warning system 1 is as shown by a central facility 10 , For example, formed a telephone control center, which receives incoming emergency calls from participants in the system, evaluates and - if necessary - initiates appropriate assistance. In the case of accident of a participant can by the central office 10 For example, an ambulance or a rescue helicopter to be informed and ordered to the accident site. Another task of the headquarters 10 It also consists in confirming incoming emergency calls and transmitting corresponding answers. Finally, the central office 10 also be used as a control center of a warning system and in the event of imminent danger information to the participants of the system 1 send.
Schematically represented in 1 are three participants of the communication system according to the invention which may be very different in terms of their design and positioning. A first participant 20 is formed, for example, by a vehicle, wherein the communication device arranged in the vehicle is configured to request assistance in the event of an accident and, for example, the triggering of an airbag. This can be initiated manually by the user of the vehicle, but it would certainly be conceivable that the communication device automatically sends an emergency call in the event of a major accident.
A second participant 21 is formed by a portable communication device, which may be formed in particular by a mobile phone. This phone 21 has accordingly in addition to the normal possibilities for mobile phone telephony extensions, which allow the transmission of an emergency call or receiving a corresponding response or a warning message.
A third participant is exemplified by an electrical appliance, for example. A TV 22 , educated. A special feature of this third participant is that the TV 22 inside a building 23 is arranged, which has an impact on the possibilities for data communication, which will be explained later. The stationary used device 22 In this case, therefore, can only be used for receiving warning information by the system 1 be provided, but not for the transmission of emergency calls.
It should be noted that the terminals of the system according to the invention 1 can be configured very diverse and can have a variety of functions. Also the use within the system according to the invention 1 can be done in different ways. Thus, as already explained, provision may be made for certain devices to be used exclusively for receiving warning messages by the system 1 On the other hand, other devices can both transmit emergency calls (possibly automatically under certain conditions) and also receive warning information in addition. Also within the framework of the system complementary from the various participants 20 . 21 and 22 used information may be of different types depending on the design of the devices.
For the communication between the different participants 20 . 21 and 22 and the central office 10 become satellites as connecting elements 30 . 30-1 . 30-2 used, over which the data connection is established. The connection to the central office 10 is hereby using a transmitting / receiving station 11 allows, which in connection with the central office 10 stands. The arrangement of the satellites and their number is preferably chosen such that worldwide a connection establishment between the participants 20 . 21 . 22 and one of the satellites 30 is possible, preferably at least three satellites 30 within the transmission and reception range of a communication device 20 . 21 . 22 should be available to allow alternative connections in the event of a data link failure.
The between the various components of the system according to the invention 1 exchanged signals can be distinguished according to their use within the emergency / warning system. A first function of the system 1 As already mentioned, the delivery of an emergency call by the subscribers and the corresponding answering of this emergency call by the central office 10 The communication connections that arise in this case can be distinguished as follows in the direction of the transmitted data and according to the various components between which there is a communication connection.
Thus, initially two so-called. Forward connections are provided, which for the transmission of information from the control center 10 to the receivers gladly 20 and 21 be used. These forward connections are further distinguished according to whether they are in the direction of the satellite 30 directed or lead away from this. Accordingly, a transmission of information from the center takes place 10 or the transmitting / receiving station 11 So via a so-called. Forward Uplink I U to the satellite 30 and via a forward downlink I D from the satellite 30 to the communication devices 20 . 21 , The transmission of information from the terminals 20 . 21 to the central office 10 in contrast, via so-called. Reverse connections, more precisely via a reverse uplink II U of the devices 20 . 21 to the satellite 30 and a reverse downlink II D from the satellite 30 to the transmitting / receiving station 11 the central office 10 , The various procedures for data transmission, in particular in the context of the reverse uplink II U and the forward downlink I D will be explained in detail later, the communication between the satellite 30 and the transceiver station 11 in contrast, can be done in the context of conventional methods, which are not the subject of the present invention.
Further communication links which are set up within the framework of the emergency call / warning system according to the invention serve in accordance with the second function of the system 1 to submit warning information. In this case, only one communication is in the direction of the central office 10 to the terminals 21 and 22 provided, it is thus turn (in the usual way built) Forward Uplink III U to the satellite 30 and a forward downlink III D from the satellite 30 to the terminals 21 . 22 educated. Also, the specific measures for forming the forward downlink III D for the transmission of warning information will be explained in detail later.
The frequency ranges used for setting up the various communication connections can, in principle, be selected in the desired manner, taking account of regulatory provisions. However, as already explained at the beginning, the terminals should as far as possible be based on technologies already in use. Accordingly, it has proved advantageous for the forward downlink frequencies in the so-called L-band in the range between 1.6455 and 1.6465 GHz and for the reverse uplink frequencies in turn in the L-band in the range between 1.544 and 1.545 GHz use. The advantage of this choice lies in the fact that these frequency ranges are close to the frequencies used by already existing mobile radio networks and, moreover, also include the frequency ranges used in the context of navigation systems. Transmitting and receiving means for the use of such frequencies are thus already in use many times and can accordingly also for devices within the scope of the system according to the invention 1 be used. For the forward uplink, frequencies in the so-called Ku band between 14 and 14.25 GHz and for the reverse downlink frequencies in the X band in the range between 10.7 and 11.7 GHz are preferably used. The distribution of the choice of these frequencies is that the antennas used for this purpose can be made geometrically small. Again, however, it should be noted that other frequencies could be used for the different signal paths.
An essential function of in 1 illustrated emergency / warning system according to the invention is thus to warn participants of the system from imminent dangers. For example, people should be warned of impending earthquakes or tidal waves. Even severe weather warnings for affected areas would be a conceivable application for such a warning system.
Difference to the data transmission
in the context of an emergency call is not the task, a participant
individually, but preferably all participants at the same time
to warn, who are affected by an imminent danger. So it has to be
within a possible
short period possible
be addressed, but ultimately the warning information, however
should only be forwarded to such users, by the
possibly upcoming event
A first inventive aspect of this warning function of the system 1 is therefore, together with the transmission of the text message that informs about the upcoming event, also determine for which geographical area the information is relevant. Preferably, as shown in FIG 3 defines the local relevance for the message or geographical area concerned by several single sites or locations that together delimit the affected area. As shown in 3 Accordingly, seven different points are selected, which in the case shown, a lake area 60 which is affected by a storm warning that is the actual subject of the alert.
The delimitation of the affected area 60 depends on how many places, which the area 60 should be available. Of course, a larger number of locations leads to an increased amount of data, so in this case, a compromise must be found to define the actual area in a data packet as compressed as possible.
According to a particularly advantageous Training is provided accordingly, the area 60 on the one hand by a reference position 61 to define whose location is specified very precisely, and on the other hand, the other points as relative positions 62-1 to 62-6 whose position relative to the reference position is specified. In the illustrated example, for example, could be provided, the reference position 61 with the help of a total of 50 bits specify, in which case for the length and width of the reference position 61 each 25 bits can be used, which ultimately allows a position specification with an accuracy of 1.2 meters. The relative positions, on the other hand, could be specified with 32 bit accuracy (16 bits for the length and 16 bits for the width), with increments of 91 meters each. As a result, a total of 6,000 km in length and width can be defined, which is sufficient for all imaginable scenarios.
Again, it should be noted that the different value ranges for the indication of the individual positions could also have been chosen differently to the affected area 60 set. For example. It would also be conceivable to make the accuracy dependent on the maximum size of the area.
For the warning message then a data format can be selected, as for example in 2 is shown. The entire data package 43 consists of four different blocks, with a first block (for example, with a length of 1,600 bits) is used as a so-called coordination or preamble, which serves to enable synchronization of the receiving devices to the satellite signal. It is noteworthy that the preamble in the illustrated embodiment is very long, which is used in accordance with the later explanations to allow reception of the satellite signals in closed rooms or buildings.
The two other blocks 43-2 and 43-3 serve the local relevance of the in the subsequent block 43-4 to define the so-called message containing information, the block 43-2 to indicate the previously explained reference position 61 while the block 43-3 the relative positions 62-1 to 62-6 indicates.
A peculiarity of in 2 As already mentioned, the data format for the warning message consists of a very long preamble 43-1 is selected. The reason for this is that as part of the warning function of the communication system according to the invention 1 the warning message should not only be sent to receivers located outdoors, but in particular also devices should be addressed which are located within closed buildings and used in a stationary manner. However, as the presentation in 1 can be removed is for such devices 22 usually a direct reception of the satellite signal is not possible. Instead, only signal portions are received, which are located in the environment objects, such as trees 24 be reflected. This here on the device 22 Consequently, the incoming signal is significantly weakened.
Due to the particularly or disproportionately long preamble of the warning message is now first ensured that even at a very weak at the receiver 22 incoming signal synchronization of the receiver to the satellite signal is enabled. However, this measure alone would not yet be sufficient for a suitable reception of the actual warning information, since the information component of the signal is ultimately too noisy in order to be able to evaluate and use the information without any doubt. As part of an advantageous development of the system according to the invention, a special method for data transmission is accordingly used, which is schematically in 4 is shown.
The basic idea of this special transmission method consists in the fact that the warning messages are transmitted more frequently and are summed up by the receivers in the correct phase until the resulting summation signal permits an error-free evaluation of the information. For example, according to the illustrated example, a certain warning information MSG A is sent five times, the corresponding information portions 70-2 to 73-2 and 75-2 from the receiving means of the communication device to the sum signal 76 be summed up. It is important here that the summation of the information components takes place in the correct phase, for which purpose the respective previous transmission of the preambles or the coordination components 70-1 to 73-1 and 75-1 is being used. Only by previously exactly synchronizing the receiver to the satellite signal using the preambles is a phase-correct summation of the information components possible, so that the desired amplification of the sum signal 76 is achieved.
Another special feature of the method is that it is not absolutely necessary that the corresponding message is repeated periodically. Instead - as in 4 shown - in the meantime, another message MSG B is transmitted, which contains information about another event and possibly for participants of the communication system 1 is determined in another geographical area. To ensure that the information share 74-2 not ver must be added to the information portions of the first message MSG A, it must therefore be ensured that the receiver acquires knowledge of which message is currently being transmitted. For this purpose, in turn, the co-ordination component or the preamble preceded by the information portion with the message can be used. The preamble additionally contains information about which the message can be identified. Although this information does not provide information about the content of the message, but allows an identification of the same, so that it is ensured that only those pieces of information are assigned, which are associated with a common message. Ultimately, therefore, the preamble in addition to the required for the synchronization of the receiver phase estimation also fulfills the task of marking the messages in order to allow the formation of a unique sum signal in the sense of the inventive method.
The in-phase amplification of the information components achieved in this way ultimately leads to the fact that the sum signal formed 76 can be uniquely evaluated to further process the message. In this way it is also ensured that even within buildings located receivers can exploit the satellite signal after a repeated repetition of the transmission of the message. As a result, the desired effect is sought that a warning information can be transmitted simultaneously as many or exactly the affected persons.
It should be noted
is that the just described procedure does not affect the reception
limited by satellite signals
is, but in principle then
can be used when textual information by means of a relatively weak
at a receiver
received incoming signal
should be. Even with other transmission methods can then
by an in-phase addition of the information parts transmitted several times
a suitable reinforcement
of the signal until an evaluation of the same is possible.
the warning function of the emergency call / warning system according to the invention can
So at the same time a large number of affected participants with
Warning messages are supplied. By the addition of
Information regarding the local
Relevance of the warning information is further ensured that the
Participants can also notice
whether they are affected by this message or not. According to one
particularly preferred embodiment
is even provided that provided in the receiving devices evaluation
independently evaluate the information regarding local relevance
and on the basis of supplementary
Check information, whether
the message for
due to its current position is currently relevant or not.
Only after checking this
Relevance then decides the device itself, whether it's the news
further processed by means of suitable processing or reproducing means
and, for example, reproduces optically or acoustically or not. It exists
thus not the problem that a user of the device a
Receives a variety of warning information and then independently determine each time
must, whether the message for
it matters or not.
advantageous prefiltering or automatic evaluation of the local
In particular, relevance of messages may be based on navigation information
done to the receiver
for example, again about
the satellite available
be put. However, that would be
it is also conceivable to otherwise determine the current position of the recipient
without the receipt of additional
Navigation signals to be instructed. If, for example, a mobile telephone is used as the receiving device,
the rough position determination for
the cell ID of the telephone network done. Also the manual input of the
current position by the user and storing this
Information in a corresponding memory of the receiving device would be conceivable.
the indication of the local
Relevance of the warning information could
a further clarification
with regard to the user of the system or the arrangement of the receiving device in certain
Facilities are made. For example, the information about one
Storm warning for
a receiver installed on a ship certainly relevant, while they are
less users within a closed building
is of interest. By inserting an additional
Data blocks could
for example, different user categories are specified, where
then in addition
Based on this information, the device automatically determines whether
the information should be reproduced or not. In this
Case could turn
a manual input by the user specify which messages
are of interest or not. This will be a very comfortable option
for individual warning against
the user of a device
It can be seen from the above explanations of the various functions of the system according to the invention that the terminals via which a communication with the satellite or the center of the emergency call / warning system takes place can be designed in the most varied manner and can also offer different functionalities. The devices can be divided into different categories in terms of their uses the.
the first place are such devices, both the transmission
of text messages for delivering an emergency call as well as the reception
enable global warning messages. Usually
show these devices
also a navigation receiver
to be used in the various transmission methods on the
Resort to navigation information
to be able to. These
the first category
for example be formed by portable communication devices. It would be though
also conceivable, such devices
to install in vehicles such as airplanes, ships or cars.
In particular, in the arrangement of such devices in vehicles could beyond
also be provided that the delivery of an emergency call automatically
in the event of an accident or the like is initiated. Of course it is
in this case the arrangement of the communication device to a
Spot beneficial to accidents
little is affected. In the arrangement in a vehicle, for example, the assembly would be
inside the passenger compartment - in particular
on the dashboard - useful,
because in this area the greatest security
from unwanted damage
second category of devices
form those, in turn, in moving objects - such.
Vehicles - arranged
or designed as portable communication devices. In contrast
to the devices
the previously described category, which includes the transmission
enable text messaging
and accordingly to the realization of a faultless data transmission
Navigation information regarding the subscriber and the satellite
are the devices
the second category exclusively
intended to receive global warning messages. In this
Case the use of a navigation receiver is not mandatory,
because of the measures described above with regard to transmission
the warning messages the complementary use
navigation information is not mandatory. In spite of
even in these cases
the navigation receiver
entail. For one thing
the over him
information is used as auxiliary information,
the reception behavior of the device
optimally tuned to the satellite signal. Furthermore
offers the navigation receiver
also the possibility
automatically check the
Relevance of the warning information with regard to a local
to check. These
also - as already
portrayed - by
the use of other information such as the location via cell identification
a mobile network or by the previous manual input
by a user of the device
third category possible
Terminals finally exists
which are arranged in particular within closed buildings. such
for example, by electrical appliances
like televisions or radios. They are exclusive
trained to receive the global warning information of the system,
due to the previously described measures receiving the information
despite the arrangement of the devices
inside closed buildings
is. The use of an additional navigation receiver is
not useful in this case. To an automatic pre-sorting
of warning information in terms of local relevance
to be able to
is in such devices
preferably provided that appropriate information through
a user when installing the device.
It should be noted
is further that the present invention with regard to the transmission
Information on the relevance of messages not on the transmission
limited by satellite
is. Also in the message medium
terrestrial transmitter for
the radio or television company would be
a corresponding coding conceivable. Furthermore, the inventive method could
also with the message transmission
be used by telephone or mobile. Basically it would be
the advantage is that only those persons receive the message
which ones actually
All in all
Thus, the present invention provides a satellite-based communication system
provided, which is a reliable transmission
text information or messages in combination with local
or user-specific information. This now exists
to form an effective global emergency call / alert system.