MXPA97000074A - Device for the transmission of messages in a communications network for the processing of words and da - Google Patents

Abstract

The present invention relates to a device for transmitting messages used in a mobile broadcasting network (1) with a plurality of terminal devices (4, 9). These may be permanently assigned to a user or may be assigned to a particular user by means of a chip card usable in the terminal apparatus. At least two terminal devices can communicate with each other in the mobile broadcasting network a communication of words or data. The mobile broadcasting network includes at least one exchange (8) for controlling the message transmission a data communication in which data telegrams are exchanged, in which a standard data header is contained. For the processing of special services according to a special procedure, the data telegram additionally includes an identification code in addition to the standardized data header. A central unit (10), assigned to the central unit (8), and at least a part of the terminal devices (4, 9) have means for creating data telegrams provided with the identification code. The central unit for special services, as well as the terminal devices or chip cards authorized for this purpose, are equipped with a filter (12.1, 12.2), preferably made as software, to recognize the identification code. This opens the possibility of transmitting not only arbitrary bit streams in transparent mode in accordance with GSM phase 2, but also of sending data and executable instructions to authorized participants or receiving them from them. This is without the internationally fixed standards having to be modified

Description

PRIOR DEVICE FOR THE TRANSFUSION OF MESSAGES IN A COMMUNICATIONS NETWORK FOR THE PROCESSING OF WORDS AND DATA The present invention relates to a device for the transmission of messages in a communication network for processing words and data with a plurality of terminal devices, which are assigned to a particular user or can be assigned to a specific user by means of a data carrier that can be used in the terminal device, wherein at least two terminal devices can communicate with each other a communication of words or data, as well as with at least one exchange for controlling the transmission of the message within the communication network, each message transmission being a data communication in which data telegrams are exchanged, in which a standardized data header with an international standardized identification code is respectively contained to determine the identity of the participant and the authenticity of the data. message, as well as with at least one existing central unit in the communication network The present invention provides at least a portion of the terminal apparatus and the central unit means for creating the data header of the data telegrams, the data telegrams being transmitted either from the central unit to at least one of the devices. terminal or from one of the terminal devices to the central unit, existing in the central unit and in the at least one mentioned part of terminal devices, devices to test the data header. Currently, many countries offer national mobile broadcaster networks that use a plurality of technical standards. However, for transit beyond borders, different networks are an obstacle. A participant in the mobile broadcaster hopes to be able to use his terminal device in different places in different countries, for example, throughout Europe. || ~. With the introduction of the GSM standard (Global System for Mobil Communication), the name of the standard of a cellular broadcasting network, the way was opened for a unitary network and, thus, for the transit beyond the borders. Figure 1 shows the conformation in principle of a mobile diffuser network, which works in accordance with the GSM standard. The surface area of the mobile diffuser network is indicated with 1. The entire surface of this network is covered by diffusing cells 2 abutting each other and superimposed on each other, of which only a few are seen in figure 1. In each diffuser cell 2 there is a base station 3 (RBS, Radio-Base -Station), which are in charge of the diffuser supply to the terminal devices in the mobile diffuser participants. In each diffuser path between a base station 3 and a terminal device 4, all the word and control information and other data, such as messages, are transmitted in a digital key.

With 5 is indicated a controller (BSC, Base-Station-ontroller) with which several base stations are controlled. For example, the controller is responsible for the passage of a participant, or of the terminal apparatus assigned to the participant, in particular a mobile diffuser telephone, from a diffusing cell to another neighboring broadcasting cell, without difficulty as regards refers to diffusing technique. On the basis of field strength measurements performed automatically, the controller decides when a diffuser cell must be passed to which neighboring broadcasting cell, this step is called Delivery (Handover). as an upper mobile broadcasting exchange 6 (NSC), which produces switchboards for the passage to a cable network 7, for example an ISDN (Integrated Services Digital Network), that is, an integrated remote digital messaging network in terms of services In a network such as the latter, it is possible to simultaneously transmit, for example, spoken information, image information, electronic data processing facilities, etc. With 9 another terminal device is indicated , for example a personal computer (PC), with which, among others, such as the use of a data communication, messages can be transmitted to a mobile diffuser phone 4. The possibility of making the latter is known among experts as a service called SMS [Short Message Service (Short Message Service)]. However, messages can also be transmitted from one mobile diffuser phone to another. The connection is always developed through a Central for the short message service 8, a so-called S ort fessage Service Center 6 (SMS-C). The SUS service for the transmission of short messages is a telecommunication service, which allows sending messages from the Central for the Short Message Service to a GSM participant [(SUS ?? / ??, Mobile Tertninated / Poi t-to- Point) From mobile terminal / Point to Point], "? Well, transmit them from a GSM participant to the Central for the Short Message Service [(SMS MO / PP, Mobile Originated / Point-to-Point) from Origenigen Mobile / De Point to Point] Each message is packed in a data telegram, in which a data header is pretitled, a Header, in which, among others, the identiication of the participant and a code is contained. It says that it is a message, with GSM Phase 2 this procedure is named, which is defined in the GSM 3.40 standard, it allows to transmit arbitrary bit streams in a transparent mode, short messages, such as "please call the participant xyz "can be transmitted well from a part icipante fl through the Central for the Short Message Service to a participant B. For example, the message is displayed on the screen in the receiver. In addition to GSM Phase 2 there are also the so-called class 2 messages. In mobile broadcasting telephones or other terminal devices provided for the processing of class 2 messages, it is assumed that a storage means exists, preferably a participant identification module (SIfl, Subscriber Identification Module) as a chip card. All the necessary data for the identiication of the user are contained in the storage medium, among others. Chip cards or processor chip cards can be used in a terminal device that can be used arbitrarily. An advantage of this mode is that, for example, a mobile diffuser participant must not carry his personal terminal device with him, but only his chip card. Class 2 messages or further developments based on them, which may be composed of one or several messages, are deposited as to the message in the aforementioned storage medium. As soon as this happens, a positive acknowledgment to the Central for the Short Message Service is released. This opens the possibility of sending to a storage medium in a terminal device or receiving data as well as executable instructions from it. The objective of the present invention was then to further develop the advantageous characteristics of class 2 messages and to transmit not only transparent bit streams, but also to offer special services with the SMS service. to authorized participants. According to the invention, the above is solved with a device for the transmission of messages in a communications network for the processing of words and data, which is characterized in that the data telegrams can contain a reliable identification code by the respective user of the network, because the central unit and already mentioned at least a part of the terminal apparatuses have means to create the other identification code and include filters to recognize the other identification code, the other code being of identification a security device that can be set by the respective operator of the network for the transmission of certain messages and is contained in the data telegram immediately following the standardized data header. With the identification code according to the invention, which may be additionally contained to the. standard data header or header in a data message frame of a message, is characterized in that the data in this message is data that must be processed in accordance with a special procedure. The identification code, which is advantageously present after the normalized data header or header, is produced either by a central unit or by terminal devices that are equipped for it, and are transmitted together with the telegram of data from the secondary station, either to the terminal device or to the central unit. Both the central unit and the terminal devices, which are equipped for this, test upon receipt of any data telegram, recognizable by the normalized data header, if the message additionally contains an identification code. If this is not the case, the data of the data telegram is treated as normal, as a message so far common in accordance with the SMS standard. If this is the case, the central unit knows that the sender of the telegram sends information that must be assigned to a special Service, not usually accessible, or to a special use. Also, the terminal apparatus knows in this case, that the data existing in the telegram with a recognized identification code includes data to process and / or information messages of a particular special service chosen previously. Data telegrams equipped with the identification code make it possible to transmit executable data and instructions to terminal devices equipped with a filter to recognize this type of data telegram, or to receive such terminal devices in the central unit, as well. equipped with a corresponding filter. Starting from the above, between the correspondingly equipped terminal devices and the central unit, which is a control center, a so-called Service Center, it is possible to define an application protocol that regulates synchronization for the controlled terminal device. of messages, the authenticity of the data through a cryptogram and the generation of an executable instruction. Based on the application protocol, new services offered by the network operator to the corresponding participant can be defined, said services being understood as exchange of messages between a terminal apparatus equipped with a corresponding filter and the Control Center. As an example of a special service such, for example, it is possible to make queries depending on the place. Thus, among other things, telephone numbers can be consulted according to the place of service of Judea, such as the service of automotive faults, doctors, pharmacies, etc. The identification code can be set by the network operator. It does not need to be adapted to any international standard and may include arbitrarily developed security devices, so as to exclude the use of special services by participants who do not have the right. Conveniently, the filter is reported as a software module, it must be stored at the time of the initial data set in a terminal apparatus, which is permanently assigned to a participant or a data carrier, preferably on a card of chips, which is permanently assigned to a participant and which is usable in a large number of unassigned terminal devices. As the aforementioned communication network, to which the device is applied, is preferably a network of communication that works in digital form, however, especially a mobile diffuser network shaped in a cellular form, which is defined in accordance with the standard GSfl or DCS 1800, as terminal devices are mostly provided by mobile diffusers. These are increasingly equipped to contain a read-write device for a chip card, in particular for processor chip cards (SIM Subscriber-Identificactiorv-Modul). A terminal device, however, could also be a "data-processing" device, such as a personal computer or a manual computer, but it could also be thought that such devices, although up to now it is not common, could present also a read-write device for chip cards The electronic data processing data specific to the user can now be used in various electronic data processing devices in accordance with the PCnciR standard by means of mobile carriers of Jrtos as diskets, hard drives or storage media in chip card sizes. In accordance with the flowchart, said filter represents a branch device that passes messages that do not contain the identification code to a first output and that carries the messages containing an identification code to a second output. This filter preferably integrated as software in the chip card is always activated when the terminal apparatus, especially the mobile diffuser device, refers to the chip card with the sns "updater" command, that is, when a message or short message must be stored on the chip card, messages that are taken to the second output due to the correct identification code , they are then tested in terms of correct synchronization of message, or message, in case the above is not given, the message is not accepted.If the message synchronization is correct, the message is immediately tested to see if it is a "^ partial message or a complete individual message. The filter can be any device that is suitable for recognizing and / or discarding data telegrams containing the identification code. In accordance with the invention, it is proposed that the number of partial messages for a complete message and information for the position of the corresponding partial message within the message be contained in the identification code. In the storage medium of the chip card, each message is stored in the sequence of its arrival for at least that long until the entire message is received. Only then is the processing initiated in the correct sequence of each message, with said sequence not having to correspond to the reception sequence. It is provided by the central office that the central unit for special services includes an operating unit, a so-called SIM Service Center (SSC). fl this SSC Operation Unit (SIM Service Center) can be assigned a logic module (SVL, ervicelogic) for each special service. Each logic module is connected in terms of functions with the SSC Operation Unit. P is also assigned a data bank, which is determined, among other things, for the administration of authorization data of participants who have the right to transmit messages with identification codes. An authentication control unit (flUC, fiuthentification Center) is also connected to the SSC Operation Unit, which is a module for calculating, encoding and controlling the cryptogram of a security code. In the identification code, the manner in which the security code is formed has been discussed above, it is only anticipated that a random number is included in it, the latter preferably being a function of the message definable by the operator of the communication network. The invention is illustrated in more detail and in an exemplary manner with the aid of figures, Fig. 1 shows the constitution in principle of a mobile diffuser network working in accordance with the GSP1 standard according to the state of the art. Figure 1 shows an expanded mobile broadcasting network according to the invention that works according to the GSM standard, Figure 3 shows a mobile broadcasting telephone. il with a chip card for a mobile broadcasting network in accordance with Figures 1 and 2. Figure 4 shows a first flow chart showing the function of the filter according to the invention. Figure 5 shows a second flow diagram illustrating the way of operating the filter in principle. Figure ñ shows the constitution of a data telegram of an SMS message in accordance with the GSPI standard. Figure 7 shows the constitution of a data telegram of a message with an identification code for special services. And the f i oura R shows the mobile broadcasting network according to Figure 2, represented in another way, to explain the process of a transmission of a warning. Starting from a mobile broadcasting network preferably working in digital form, conformed elularly, according to Figure 1, defined according to the GSM or DCS 1800 standard, the device for transmitting messages of conformity in the invention includes the extensions of the network indicated in figure 2. To send and receive messages containing in their data telegram the identification code according to the invention, the terminal apparatuses t, 9 provided therefor are equipped with a filter 12.1. This is preferably a software module and is contained either in a memory in the same terminal device or preferably in a chip card, which can be inserted into a device. write-read disposed in the terminal apparatus 4. The Central for the Short Message Service (SMS-C) B conducts the data telegrams transmitted by the terminal devices 4, 9 to an operation center for special services (SSC, SIM Service Center) 10. This central unit is also assigned a filter 12.2 which immediately returns to the Central for Short Message Service 8 data telegrams without an identification code and processes only those with an identification code. 0 the operation center is "assigned, preferably for each special service, for which in the introduction of the description an example was already mentioned, a logic module (SVL 1, SVU n, Service Logic) 11.1 to 11. n With 11.1 the logic module for a first special service or a first application is indicated, with 11. n, a logic module for a special service not an application n.The number of special services or applications is not limited and depends Essentially the creativity of the operator - the network The SSC Operation Unit 10 works together with the modules 14, 15 to manage the authorization data of each participant who has the right to transmit messages with identification code, even to calculate, coding and controlling a security code contained in the identification code The first of these modules is essentially a data bank 14, in which identification data are deposited of participation of participants who have right to use special services. In the second module ¿5, the Control Unit of Retrofitification is checked upon receiving the message a security code contained in the identification code, or, in messages to be transmitted, it is calculated and encoded. An example of this was indicated above. Advantageously, a spoken response unit VRU (Voice Response Unit) 13 is also assigned to the Operation Unit SSC (Without Service Center) 10, which specially guarantees a participant requesting a special service, support with spoken notices for resort to the desired special service. In special cases, the VRU can also be a Help Desk in which the spoken text is made in a personal way. In Figure 3 a mobile diffuser telephone is shown as or commonly used in a message transmission device according to the modeling example. Said telephone Occludes an operating field, or a keypad 16, a warning field, especially in the form of an LC display 17, a 1T antenna, an auditory aperture 19 behind which a handset is arranged to emit a communication speech, as well as an opening microphone 20, through which acoustic signals are guided to a microphone that must be transmitted. An opening 21 for inserting a chip card is also provided in the mobile diffuser phone 4. Within the opening or slot 21 there is a writing device- The card, through which an exchange of cards between the terminal apparatus and a chip card 22 can take place, requires a minimum of 8 kilobyte EEPROM memory to work with the special services. they contain the memories in chip 23 and are not shown in detail in the figure. The chip 23 can be electrically connected through a contact field 24, which is composed of several individual electrical contacts, with the read-write device arranged in the mobile telephone or diffuser. A memory area including a chip card operating system (COS Card Opera ^ ing System) is indicated on the chip 23 with reference 25. With 26 indicates that area of memory in which the filter 12.1 is deposited. There are also other memory areas, especially for the temporary storage of several messages of a complete warning, however, they are not particularly illustrated in the figure. How the filter 12.1 according to the invention can be performed in order to recognize the identification code and how it can be introduced in the operating system on chip 23 of a chip card, can be seen in figures 4 and 5. The chip card operating system 25 is divided into a first part 25.1 which, from a flow of information arriving at the terminal device, recognizes especially if a data telegram exists therein. with the standard data header or Header, defined in accordance with GSM 4.08, or GSM 3.40. In case a Short Message is recognized in this way, the first part of operating system 25.1 ensures that the corresponding data telegram is captured. With the filter 12.1 according to the invention, each recognized data telegram is checked to see if the identification code 12.1 exists. As already mentioned, the filter represents a software branch with one input and two outputs, guiding the data telegrams that do not contain the identification code directly to a first output, which is connected to block 25.2, a second part. of the operating system. This type of data telegrams is stored in the chip card according to the state of the art. The above is commonly carried out based on instructions that may be contained, for example, in the second part 25.2 of the operating system. If the filter recognizes an identification code, the corresponding message is guided through a second exit towards a Module 27 to process a special service. In the identification code is contained, among others, information that clarifies whether the message received is an individual warning or if other messages follow until a complete notice is transmitted. In any case, the terminal apparatus is informed of the message number of the message that has just been received. This is necessary because messages within the communications network are transferred in accordance with certain priority criteria, which will not be entered here anymore. detail, and that they are responsible for several messages of an aircraft can be left in any sequence in the receiving device, which does not necessarily coincide with the correct one. So that no difficulties arise due to the above, a memory area 28 is provided on the chip, in which all the messages of a warning are stored until everything has been transmitted, then the process begins with the warning. In a notice that consists of a single message, the processing, obviously, is done immediately. In Figure 5 another flow chart is shown where the working principle of the filter according to the invention can be seen. As soon as a data telegram is determined as a message in accordance with the GSM standard (block 29), it is tested in a first revision block 30 whether a correct identification code is contained in the data telegram. If this is not the case, the message is guided to the first exit of the fi lter to block 25. 2. In the case of correct recognition, which is carried out by a new calculation of the cryptogram already mentioned in the introduction and by comparison with the transmitted cryptogram, in a second revision block 31 it is further tested whether the synchronization is correct. We talked more about it and the cryptogram earlier. In case of incorrect synchronization, the data telegram is transferred directly through the first output to block 25. 2. In case of correct synchronization, in a third block of revision 32 is determined if the message received is a complete notice or if it is only a partial notice. How this is determined, was also described previously. If the message received is a complete notice, you are taken directly to module 27 for immediate processing. On the other hand, if it is determined that the message is only part of a warning, for the reasons already mentioned, processing can not take place until all the notice has been received. In this case, the partial warning is stored in the memory area provided for it at least for so long until all the partial warnings are received and processing can begin. This is monitored in decision block 34. Filter 12.2, which is also preferably a software module and is deposited in an existing memory area in the central office for special services (SSC), corresponds in terms of functions to the filter that has just been described. In FIG. 6 a data telegram is shown for transmitting a short message with the standardized Short Message Service (SMS). The data telegram 35, according to the GSM standard, is defined with a length of 176 bytes. It includes a data header or Header 36, 37, which includes a first block 36 of 13 bytes in length, in which the participant's address data are contained, which, as already stated, are defined in accordance with the GSM 4.08 standard. R continuation of said first block, in the Header there is a second block 37 that has a length of 23 bytes and in which specific data of the Short Message Service are contained, defined in accordance with the GSM 3.40 standard. In this context, no more detail will be entered in each block, since the corresponding information can be consulted in the mentioned publications. Following the data header, in a data telegram in accordance with the standards there are 140"" bytes that essentially contain the message information 38, 40, 44. In FIG. 7 it is represented in contrast to the data telegram that is terminated. to describe, a data telegram 39 which includes the identification code 40 according to the invention, called Transport-Protocol-Data-Unit (TP-DU). The data telegram, in accordance with the GSM standard, is also 176 bytes long and includes the same "data header or Header composed of the blocks 36, 37. Preferably, the identification code 40 is contained below. , in turn, is composed of several blocks 41, 42, 43. These blocks necessary for an information flow without errors for the notices that are assigned to special services, include a first block identified as 41 with the data on the number of messages for a complete notice, data on the position of the corresponding message in the complete notice, as well as data on the total number of messages transmitted from a moment to. Block 42 includes data on the synchronization of notices, which was discussed in more detail above. The same is valid for block 43, in which a security code is deposited from the data of block 42 as well as secret data, which are stored both on the transmitter side and on the receiver side. calculated. In mobile diffusers, the secret data are contained in the cnips card and in the SSC Operation Unit, in the data bank assigned to it. More information in this regard is also described below based on the explanation of the process of transmitting a notice. This process of transmitting a warning can be seen in figure 8. flhí, the mobile diffuser network according to figure 2, is drawn in a more suitable representation for the explanation of the mentioned process. In the chosen representation, the melter cells 2, the stations 3, the controllers for several base stations 5, the mobile broadcasting station 6 as well as a telephone network 7 connected to it by cable are summarized in a single box. Outside this box are two terminal devices, especially mobile diffusers * with a chip card respectively. Both mobile broadcasting telephones 4 are assigned to a participant fi and a participant B. Also outside the common box, the exchange is drawn for the short message service SMS-C (Short Message Ser ice-Center) 8. Connected in function with the Central for the Short Message Service 8 is, according to the invention, the operation center for special services (SSC, SIN Service Center) 10 with the filter 12.2. The Logic Modules for Service (Service Logic Module) 11.1 to 11., each one for a special service, are assigned to the operation center, as already mentioned. In figure H, also outside the common box, both modules 14 and 15 can be seen, or else the databank module 14 and the authentication control unit 15. In addition, the response unit can be seen. Speech or Voice Response Unit (VRU) 13.

The participant 0, who introduced his personal card of chip 22 in a mobile diffuser device and by this card is identified, calls with the keys in his field of operation a service number. This can be, for example, a telephone number without charges. This call arrives through the mobile broadcaster, not represented by the Voice Response Unit 13. This requires the participant P, through a spoken text to select a service. After performing the service selection, which is also performed with the keys of the participant's field of operation f, the Speech Response Unit 13 signals with the SSC 10 Operation Unit that participant 0, for example, selected the SVL service 1. The Spoken Response Unit 13 may for this purpose automatically determine the number of the calling party (Calling Number Identification) or ask it through a text spoken again to the calling party. This flow of information is identified in the figure with a, b. The SSC Operation Unit 10 now tests on the basis of the data bank 14 whether the customer is known and is entitled to the SVL service 1. If not, the request is, for example, rejected by a corresponding spoken text of the Service Unit. Answer Spoken If this is the case, the first warning is formed for the desired SVL 1 service and, through the call of the security code of the Control Unit of Rutenti fi cation 14, the cryptogram is formed. The formation of such a cryptogram or of a word encoded according to certain rules can be carried out, for example, in accordance with the known DES standard. This is due, for example, to an equation SRES = R3 (ki, ROND) In it they mean: '] SRES Signed Responds / response to the warning, R3 secret algorithm, stored both in the Rutenti ication Center 15, as well as in the card chip 22, ki secret key that is also stored in the Control Unit 15, as present in the card 22 of the corresponding participant, RRND Random / random number or test sum, which, for example, can be determined according to the invention from the content of the first notice as follows: RRND = f (warning). The function by which the random number or the test sum of the warning is determined can, for example, be determined by the same participant in connection with a identification procedure when using the chip card for the first time, the procedure of which is not will speak here more to detail. It can be any mathematical function, which in some way, for example, is linked to the length of the plane. The random number or the test sum RflND, or the function according to which this number is to be calculated, are stored in the chip card 22 and in the Control Control Unit 15 and are calculated each time in place. The SRES encryption calculated in accordance with the aforementioned formulas is stored in the block 43 of the identifier code 40 in the data telegram, fi xed in the data bank 14, the current synchronization counter for the card is determined. of chips 22 of participant 0. The content, the synchronization counter is also part of the identification code and is deposited in block 42. In block 41 of the identification code, how many messages are covered by the notice required and by transmission is recorded. r to participant P and what message is prepared within a sequence of messages. These procedures are identi fi ed in Figure B with the letter c. The SSC 10 Operation Unit now sends the aircraft prepared in this way, which may consist of one or several messages, or else data telegrams, to the participant fl, or oien, to their chip card 22, which is inserted in a terminal apparatus 4. All notices are sent, as said at the beginning, as 6SM class notices 2. The sending of this type of warnings is indicated with the letter d. As soon as a notice, which passed through the filter test criteria on the chip card, is stored on the chip card of participant R, it generates a positive response, indicated as e, and sends it to the SSC Operation Unit (SIM Service Center). In accordance with the GSM standard, all notices are sent and received through a Central for the Short Message Service CShort Message Center (SMS-C) 8. The filter 12.1 according to the invention, contained in an area of memory on the chip card 22 of the participant fi, recognizes the incoming warnings, collects partial warnings in the chip memory area 28 and performs the use of the card when all martial warnings were received. block 41 from the identification code 40. The card can generate, for example, as a result of the notices received, new notices that come out and send them as short messages SMS MO-PP (see above) to the Central for the Message Service Short to, which transmits the notices in bas »to the identification code to the SSC Operation Unit (SIM Service Center) 10. A notice like this is indicated with the letter f in figure 8.

A cycle d, e, f can be repeated infinity of times according to the special service desired and according to the selected logic module 11.1 to 11. n. The SSC Operating Unit 10 increases the synchronization counter per card with each notification and forms a corresponding cryptogram according to the warning, so that the chip card of participant A can prove the authenticity of the data. The responses of the chip card of the participant ñ to the SSC Operation Unit (SIM Service Center) 10 are preferably also encoded ~ < In accordance with the above formulas. The sequence of blocks 41, 42, 43 is not essential to the invention and. It can be arbitrary.

Claims (1)

1. NOVELTY OF THE INVENTION CLAIMS 1. - A device for transmitting messages in a communication network for the processing of words and data with a plurality of terminal devices assigned to a particular user or that can be assigned to a particular user by means of a data carrier usable in the terminal apparatus, wherein at least two terminal devices can communicate with each other a communication of words or data, as well as with at least one exchange for controlling the transmission of the message within the communications network, each transmission being message a data communication in which data telegrams are exchanged, in which respectively a standardized data header is contained with an international standardized identification code to determine the identity of the participant and the authenticity of the message, as well as with less an existing central unit in the communications network, presenting at least a part of the terminal apparatuses and the central unit means for creating the data header of the data telegrams, the data telegrams being transmitted either from the central unit to at least one of the terminal apparatuses or of one of the apparatus of terminal to the central unit, existing in the central unit and in the at least a part mentioned of terminal apparatuses, devices for testing the data header, characterized in that the data telegrams can contain another identification code that can be set by the corresponding operator of the network; because the central unit and the aforementioned at least one part of the terminal apparatuses have means for creating the other identification code and include filters for recognizing the other identification code, this being a security device that can be fixed by the respective operator of the terminal. the network for the transmission of certain messages and being contained in the data telegram immediately following the standard data header. 2. - A device according to claim 1, characterized in that the communications network is a communications network that works in digital form, especially a mobile user network conformed cellularly in accordance with the standard GSM or DCS 1B00. 3. - A device according to claim 1 or 2, characterized in that the filters assigned to the terminal devices are respectively a software module that is contained in a storage medium present in the terminal apparatus or in the data carrier . k.- A device according to one of claims 1 to 3, characterized in that at least a part of the terminal devices are telephone diffusers jwSviles that respectively include a device for exchanging data with the data carrier, especially with a chip card usable in the mobile diffuser telephone. 5. - A device according to one of claims 1 to 4, characterized in that the data telegrams containing the other identification code are only a part of a message consisting of several data telegrams, and in each data telegram, in addition to the identification code, the number of telegrams of data for the complete message and information for the position of the corresponding data telegram within the message. 6. - A device according to claim 5, characterized in that there is a control means that acts so that each telegram belonging to a warning is stored in the storage medium, and because the next processing of the data telegrams is It only takes place when the complete notice is in the middle of the file. 7. - A device according to one of claims 1 to 6, characterized in that modules are assigned to the central unit for the authorization data management of individual participants who have the right to transmit messages with the other identification code and for calculate, code and control a security code contained in the other identification code. 8. - A device in accordance with the claim 7, characterized in that the value of a random number (RRND) is considered in the security code, this preferably being a function of the message that can be defined by the operator of the communication network. 9. - A device according to one of claims 1 to 8, characterized in that the data telegrams provided with the other identification code, are components of special services offered by the operator of the communications network. 10. - A device according to one of claims 1 to 9, characterized in that the data telegrams provided with the other identification code contain the information of the code message. SUMMARY OF THE INVENTION The device for transmitting messages is used in a mobile user network (1) with a plurality of terminal devices (4, 9). These may be permanently assigned to a user or may be assigned to a particular user by means of a chip card usable in the terminal apparatus. At least two terminal devices can communicate with each other in the mobile broadcasting network a communication of words or data. The mobile broadcasting network includes at least one exchange (T) for controlling the transmission of the message, each message transmission being a data communication in which data telegrams are exchanged, in which a standardized data header is contained. For the processing of special services according to a special procedure, the data telegram additionally includes an identification code in addition to the standardized data header. the central unit (10), assigned to the central unit (8), and at least a part of the terminal devices f, 9) have means for creating data telegrams provided with the identification code. The central unit for special services, as well as the terminal devices or chip cards authorized for this purpose, are equipped with a filter (12.1, 12.2), preferably made as software, to recognize the identification code. This opens the possibility of transmitting not only arbitrary bit streams in ¾1 transparent mode in accordance with 6SM phase 2, but also to send data and executable instructions to authorized participants or to receive them from them. This is without the internationally fixed standards having to be modified. (Figure 2) P96 / 95BF