FI116653B - Procedure for realizing public broadcasting in mobile communication networks - Google Patents

Description

116653

A method for implementing broadcasting over a mobile communication network

Field of the Invention

The invention relates to broadcasts and ways of transmitting audio-visual content to mobile subscribers, particularly in 3G networks.

BACKGROUND ART The known mode of distribution of TV and radio programs to TV and radio receivers is called broadcasting. In mobile networks, broadcasting or 10 multipoint connection is a relatively new thing. Traditionally, it has only been possible to establish point-to-point connections in mobile networks.

One example of the challenges of prior art is the idea of providing a locally-targeted traffic information program to motorists. warns of traffic jams on certain sections of the road. This allows motorists to choose their route based on the 15 traffic information they receive to avoid the most congested road sections.

As a first embodiment, TV technology is mentioned. In principle, TV technology can provide a traffic information program for motorists. Digital TV broadcasting technology offers a more efficient transmission than the old analogue 20 broadcasting technology, but neither of them is able to precisely target broadcasts to geographical areas, namely: ·. in the case of certain sections of the road. Nor do motorists usually have any receivers for TV broadcasting in their * .. .. advice.

Thus, the first embodiment includes the following disadvantage. In practice, it is impossible to target the traffic information to a particular section of road, which significantly reduces the functionality of the implementation option i '* [: for the desired use.

As another alternative, Cell Broadcasting technology is provided which gives TV a better chance of targeting ... 30 broadcast to a specific area such as a section of road. Cell Broadcasting technology: 'Provides means for transmitting text-only information. Together with Cell

A Broadcast message can contain up to 92 alphanumeric characters. Yes ·· *: Up to 15 messages can be bundled together, so the total length of an .il !: message can be 1380 characters / characters. Furthermore, reading text messages 35 in a vehicle is quite troublesome and potentially illegal.

»IMt • · (t 2 116653 FIG. 1 illustrates a simplified form of text messaging via Cell Broadcasting. The Cell Broadcast Entity element 101 includes applications that use a content service (such as a traffic information program). The element 101 relays a request 102 to a CBC. cell (Cell Broadcast Center) 103, the request 102 for sending text messages to certain cells The CBC element is associated with a Radio Network Controller (RNC) element 105 in the Service Area Broadcast Protocol (SAB) protocol. The CBC element 103 then sends a request for text message delivery. 104 to the RNC element 105, which in turn 10 transmits the message 106 to the base station 107 using the BMC (Broadcast / Multicast Protocol) protocol. The base station transmits SMS 106 and 109 according to the message 106 to the mobile stations 110 and 111. If the mobile stations are configured to receive Cell Broadcasts , performing them via text message t-display devices.

A disadvantage of the second embodiment is that the known Cell

The Broadcast Technique is not capable of transmitting even a still image, let alone video or audio, so this technology does not make the traffic information program very useful to the motorist.

The third embodiment is based on the utilization of the spatial information service and the multimedia messaging service (MMS-20). An MMS is a short, multimedia presentation at a glance. Conventional text; In addition to the message content, a multimedia presentation can include pictures, graphics, sound, and *> audio clips. In the future, it is also possible to include video clips in the presentation. In addition to the text file, the MMS standard supports at least the following 25 file types: JPEG, GIF, AMR audio file. In the third implementation step; In the t condition, the driver's movement is tracked with the help of the spatial information service and, if the predefined criteria for sending a traffic information program are met, the driver is »». ··. sending a traffic information program within MMS messages. Thus, every motorist interested in net traffic information will receive his or her own MMS while on a certain 30 road sections at a given time.

: · FIGURE 2 illustrates content distribution according to MMS technology. Initially an MMS message from a content service such as a traffic information application 201. * ··. is forwarded to the MMS-Relay element 202. The MMS-Relay 202 forwards the MMS message ". 201 to the MMS server 203, which stores it in its database 204.

35 MMS-Relay 202 notifies customer 205 of incoming MMS: ··: message 201. Notification 205 is transmitted via Short Message Service Center (SMSC) 206 and 3 116653 Mobile Switching Center (MSC) 207 to base station 208, which transmits notification to Customer Terminal 209. activation of a specific application on the terminal. The application communicates with the base station 208, the GPRS network 210, the WAP gateway 211, and the MMS-5 Relay element 202 to the MMS server 203, thereby establishing a point-to-point connection 212 between the terminal 209 and the MMS server 203. Finally, the MMS server retrieves from the database 204 an MMS message addressed to the client 201 and sends it via the established point-to-point connection to the terminal 209.

10 A disadvantage of the third embodiment is the point-to-point connections. When there are several motorists in the same geographical area as the cellular area of a cellular network, the capacity of the cellular network is not sufficient for many simultaneous two-way connections between each motorist and a server providing traffic information. In addition, the cost of using 15 mobile networks for point-to-point connections is higher than the cost of a single broadcast or multipoint connection.

In the pre-third generation (3G) communications technology, broadcasting has two main drawbacks. Firstly, broadcasting to mobile stations is limited to SMS only. Secondly, the audio-visual transmission 20 to many mobile stations simultaneously has to be implemented as a point-to-point connection, which places a considerable load on the mobile network, especially at its radio interface. Specifically, the available data transfer capacity may be depleted or too expensive to use.

3G communication technology may provide some solutions to the disadvantages mentioned above. European ETSI has performed 3G-i: UMTS (Universal Mobile Communication System) j '-'; and the international ITU IMT-2000 designation.

FIGURE 3 illustrates a UMTS / IMT-2000 system architecture including a User Equipment (UE) 301, a UMTS 30 Terrestrial Radio Access Network 302, and a core network 303.

* · · 'The radio interface between the UE and the UTRAN is called Uu 304 and the UTRAN and core network is called lu, · * ·. interface 305. ETSI's WCDMA (Wide-Band Code Division Multiple Access) is a Uu-35 interface based on UMTS and IMT-2000 system architecture. In this patent application, we assume that the core network 303 includes at least a GSM standard circuit switched MSC-4 116653 (Mobile Services Switching Center) network element and a GPRS standard GGSN network element (Gateway GPRS Support Node) utilized in packet switching. ETSI's WCDMA supports both circuit switched networks and packet switching networks. In the following, we will refer to 5 as "terminal" or "mobile" instead of "user equipment" 301.

The prior art poses the following challenges.

First, how is broadcast (or multipoint broadcasting) accurately targeted to specific geographical areas, such as cells, when needed?

Secondly, how can broadcast be implemented in a manner that conserves the resources of the mobile communication network, especially the radio interface resources?

Third, how can localization of subscribers be avoided, in whole or in part, and thus saved in the cost of positioning and thus in the total cost of the value added service? 15

BRIEF SUMMARY OF THE INVENTION

The above example of a traffic information program is only one example where the invention can be utilized. In general, the invention enables audiovisual broadcasting over a mobile communication network, while simultaneously addressing all of the above challenges.

The first feature of the invention is that a code divisional multiplexing network is used for transmission. For example, the DSCH-v '(Downlink Shared Channel) traffic channel used in WCDMA networks (Wideband Code Division Multiple Access) is well suited for broadcasting.

In this case, the broadcast to the mobile stations may contain audio, video or i:; other data.

Another feature of the invention is that it utilizes Cell. · *. CBC (Cell Broadcast Center) element associated with the Broadcast Service. This addresses the first challenge, which is to allow the broadcast to be targeted to 30 desired geographical areas.

A third feature of the invention is that several terminals, ···, simultaneously receive a broadcast of the same broadcast channel, such as the DSCH, synchronously. Terminal synchronization is performed in CBC. element using a suitable channel such as a BCH (Broadcast 35 Channel). This is the answer to the second challenge, that is, radio interface resources •: · ·: used sparingly.

5 The use of the 116653 CBC element in conjunction with the new capabilities offered by WCDMA also addresses the third challenge, so that subscriber location is not required to implement a traffic information program or similar services.

In the method according to the invention, the content of the service is transmitted to mobile stations located in a certain geographical area as follows. Initially, the method places a message or messages related to the content / transmission of the service in a repository from which the CBC element of the Cell Broadcast service is adapted to read the packets. The message transmission message is distributed to at least one base station located in the geographical area, from which a code associated with receiving messages and code division multiplexing is transmitted over the first channel to the mobile stations. Preferably, the first channel is a BCH channel. Said code is base station and cell specific and is received in the coverage area of the base station at the first and second mobile stations. The first and second mobile stations are then connected to the CBC element through a base station and a Cell Broadcast service by a code indicating second channel. Preferably, the second channel is a DSCH channel. Finally, messages are retrieved from the data store by means of the CBC element and sent over the established multipoint connection from the CBC element 20 to the first and second mobile stations.

Receiving messages and code sharing channels when needed; v. the associated code is distributed encrypted. In this case, only the mobile stations having the decryption key will have access to the code and thus be able to receive the message set. In this way, it is possible to implement a virtual network * * "* within 25 public networks.

; The invention is applicable to the implementation of various types of value added services.

* * · ': In addition to the traffic information program, the invention enables the distribution of information and entertainment I *. · *, Mm. at public events such as concerts and football matches.

In the following, the invention will be explained in more detail with reference to the following: ...: schematic diagrams of which "', FIG. 1 illustrates text messaging on Cell Broadcasting, FIG. 2 illustrates MMS content distribution,;; · · Figure 3 shows the UMTS / IMT-2000 system architecture, »» 1 *.

Fig. 4 shows an example of a value added service utilizing the invention, Fig. 5 illustrates the main steps of the inventive method, Fig. 6 illustrates an essential feature of the inventive system, Fig. 7 shows an example of content delivery to terminals, virtual network with a line unit.

DETAILED DESCRIPTION OF THE INVENTION

The invention thus enables an advantageous way of implementing broadcast 10 in a mobile communication network. If necessary, the time-limited broadcast may be placed in its entirety in a message set containing at least one message.

FIGURE 4 illustrates an example of a value-added service utilizing the invention. Suppose that the value-added service provides traffic information as MMS compliant message sets or audio clips. One audio clip 15 pi 401 generates one current broadcast and is forwarded to the MMS relay element 402 which forwards it to the MMS server 403 and the MMS server stores the audio clip in its database 404. In addition, the MMS relay 402 sends a notification 405 to the CBC element 406. In response to the notification it receives, the CBC element establishes a connection to the MMS server 403 via the MMS-Relay element 20, retrieves the audio clip and places it in its own database 407 (retrieve and insert audio clip. ·, Marked with dashed arrows). Thereafter, the mobile stations must be notified of the distribution of the audio clip placed in the database 407, which is performing *. as follows. The CBC element 406 sends a message 408 to the RNC-I> 25 element 409, which forwards it to the base station 410. The message 408:! ! consequently, the base station 409 transmits the code 411 associated with code division multiplexing and receiving the audio clip 401 i 'to the mobile stations of at least one cell.

Mobile stations 412 and 413 receive and generate code 411

<t I

as determined by the multipoint connection 414 via the base station 410 and the RNC; v> 30 element 411 to the CBC element 406. At the time determined by the code 411, the audio clip 401 is transmitted via the multipoint connection 414 to the mobile stations 412 and 413 (and other mobile stations). if a multipoint connection is established). Although Figure 4 shows only one RNC and one base station, there may actually be many. CBC can communicate with multiple RNCs. 35 elements, and each RNC can communicate with several base stations in its own geographic *: "area.

• I

7 116653

In the design of a mobile network, the radio frequencies allocated to a particular network are divided into radio channels. Of the three known methods of splitting radio channels, code division multiplexing is best suited for implementing multipoint connections. For example, time-division multiplexing as well as frequency division multiplexing used in GSM and GPRS networks are poorly suited for multipoint communication. By means of the invention, the point-to-point connection can be implemented in a technically and economically sensible manner, while at the same time offering several advantages over the prior art.

A particular advantage of the invention is the efficient use of the radio interface. Because all 10 receiving terminals "" synchronize to "the same video and / or audio transmission, the communication between the RNC (Radio Network Controller) and each terminal is highly efficient, and simultaneous broadcast transmission is possible through a plurality of terminals. Thus, video and / or audio broadcasts can be transmitted to a plurality of individuals 15 quickly and with the least possible loss of picture and sound quality.

The method according to the invention is quite independent of the network operator. For example, a service provider producing a traffic information program is able to distribute its program to multiple network operators simultaneously provided they have a CBC element that supports the invention. Thus, the motorist is not tied to 20 specific network or mobile phone operators to obtain traffic information.

One advantage of the invention is its potential to utilize MMS technology supported by multiple terminals. In the near future, prices for MMS terminals will fall, so the method of the invention provides a very affordable and easy way to receive picture and audio. . 25 information.

The method according to the invention in combination with MMS technology also provides the following advantage. When the CBC element acts as a cache for MMS messages: ", cellular network resources are not wasted on transmitting MMS messages from the MMSC (Multimedia Messaging Service Center) to the terminal-30. This method is useful in optimizing cellular network element load and inter-element traffic. as multi-media presentation distribution becomes more common, this optimization significantly improves the performance of the network: '':

·; ·· In comparison with radio or TV broadcasting, broadcasting according to the invention provides the advantage that the broadcast is available to certain subscribers. Thus, it is possible to allocate the paid value added service only to 8 116653 subscribers of the mobile network who have paid for the value added service. The code required to receive the broadcast (such as code 410 in FIG. 4) is then transmitted encrypted to the subscribers paying for the value added services. These subscribers have a decryption key. The decryption key is in subscribers' terminals 5 adapted to decrypt the code and thereafter establish a multipoint connection to the CBC element. Thus, in addition to a private network, a paid value-added service is another way to utilize encryption in an inventive manner.

In the context of Figure 4, a time-limited broadcast, e.g., an audio clip of 10 minutes, was placed in its entirety in a message set containing at least one message. This set of messages can be considered as a recording which is distributed to the mobile stations. Alternatively, the broadcast may be performed on-line. The content / information of the service is then distributed in real time, which is important for some services.

15 The message set associated with the broadcast may thus include the entire broadcast, in which case the broadcast is of the recording type. Alternatively, the message set may include a live portion of the broadcast, whereby the broadcast is of the online type.

FIG. 5 illustrates the main steps of a method according to the invention for implementing broadcasting over a predetermined geographical area in a mobile network using code division multiplexing. The geographical area may consist of one or more cells, which may be adjacent to each other or may be located far apart. Initially, the control unit 501 places at least one message containing and generic. , A repository of 25 related messages. The control unit then transmits: 502 message set messages to the base station or base stations in the geographic area through the: V CBC element of the Cell Broadcast service. The receiving base station transmits 503 the code associated with receiving the message set and code division multiplexing to the mobile stations: v. 30 first channels. The control unit may be a separate device or it may be implemented as software. This software is preferably housed in a CBC-T element. The prior art CBC is able to determine to which RNCs, to which base stations the message set should be sent, and to which cells the message set should be sent. This feature makes the CBC element, 35, very useful for the invention. The first channel mentioned above is preferably a BCH (Broadcast Channel) because it is a broadcast channel, i.e. all cell / cellular mobile stations receive the code transmitted by the CBC element. The mobile station receiving the code, or more specifically the mobile station's SIM card, may have an application installed which operates automatically when the code is received. Alternatively, the application may be such that it emits, for example, a tone and displays information on its display, whereby the user of the mobile station can decide on the basis of that information whether he wishes to receive the broadcast. If a user wants to receive a broadcast, he or she commands the application to take action. The method is applicable to both of these applications. The transmitted code is received at the first mobile station and at another mobile station. In response to the transmitted code, the first and second mobile stations establish a 504 multipoint connection on the second channel, denoted by the code, to the transmitting base station and through the base station to the CBC element. The CBC controlled by the control unit reads 505 broadcast message set from the data store and sends 506 message set through a multipoint connection to the first and second mobile stations.

Preferably, the first channel associated with the operation of the method is a BCH channel. If the code is to be distributed only to selected subscribers, the code can be sent to them via the FACH (Forward-Access Channel). However, using the FACH-20 channel consumes more network resources than using the BCH channel. Another way is to encrypt the code and send it on the BCH. This allows all subscribers of the cell (s) to receive the encrypted code but: 'Only selected subscribers have an encryption key on their terminals. Encryption,. .: The key is preferably stored on the SIM cards of their terminals.

. . The second channel associated with the operation of the method is preferably DSCH- · *; / channel, or HS-: ·; developed by 3GPP (Third-generation Partnership Project). DSCH (High-speed Downlink Shared Channel) if higher transmission capacity is required. The user of the terminal has the possibility to switch off another channel if he does not wish to receive the traffic information program or: *. *. 30 other content offered on another channel.

If the code associated with the reception or transmission of all or part of the broadcast is transmitted encrypted to the mobile stations, it can be assumed that the elements of the broadcast: •: ·: the mobile network elements constitute a private network.

'. In addition to the method, the invention comprises a system that can be implemented from a value-added service.

Fig. 6 shows the main features of the system according to the invention. The system control unit 601 is adapted to accommodate the broadcast message set 602 comprising the broadcast and the at least one message to the system storage 603. The system control unit 601 is adapted to send message specific message 604 via Ceil Broadcast CBC element 605 to at least one base station from which, as a result of this announcement, code 606 associated with receiving the message set and code division multiplexing is transmitted to the mobile stations through the first channel. Each base station within a specific geographical area receives notification via its 604 RNCs (the base station (s) and the RNC element (s) are omitted from FIG. 6). The system is further adapted to establish a multipoint connection 609 from a first code receiving mobile station 607 and a second code receiving mobile station 608 by a code-denoted second channel 15 to the transmitting base station and through the base station to the CBC element. The system control unit is further adapted to read 610 the message set 602 from the data store 603 to the CBC element 605 and send the message set from the CBC element through the multipoint connection 609 to the first 607 and the second mobile station 608. The data store 603 may be a database or

In addition to Figure 6, the system may include a storage unit which: is adapted to receive the entire broadcast at a time. Same service ;; or the content may, however, be accompanied by several successive broadcasts.

. Alternatively or additionally, the system may include an on-line unit adapted to receive the live part of the broadcast. Both the storage unit and the receiving unit are optionally adapted to convert:,: the received broadcast into a message set and to place the message set in data storage 603, or alternatively the control unit 601 is adapted to perform such operations. Further, the control unit is adapted to monitor the use of the recording unit 30 and / or the on-line unit and to send a notification 604 to the CBC element 605 when the message set is placed in the data store 603. Thereafter, the · ·; The CBC operates as shown in Figure 6.

FIG. 7 shows an example for delivering content to terminals. ·; ·; The previous figures relating to the invention have discussed how the content converted to a message set 35 is transferred from the MMS-Relay element to the CBC element and * * to the terminals. This Figure 7 illustrates the content generation step and the 11 116653 message set generation step. Content is created when, for example, camera 701 captures an object. The camera provides picture and audio data. If you were only interested in audio, you could use a tape recorder. The image and sound data produced by the camera 701 are recorded in the recording function 5 702 in digital or analog form. One or more frames can be extracted from the stored data using the editing function 703 and the frames can be edited. The format conversion function 704 converts the edited frames into MMS messages, which are transmitted through the private network 705 to the database 706. The functions 702-704 may be implemented in one or more systems.

10 These systems, the private network 705, and the database 706 are typically owned by the content provider, the production company, or the like. This entity controls the delivery of MMS messages stored in database 706 through management system 707. MMS messages can be distributed over public network 708 to a plurality of MMS Relay elements 709-711. Usually, each of the 15 network or service operators has its own MMS-Relay element. From each MMS-Relay element 709-711 message set (MMS messages) can be distributed to the terminals, for example as shown in Fig. 4.

The message set (MMS messages) stored in the MMS-Relay elements 402, 709, 710 or 711 contains distribution information in some form, for example 20 GPS coordinates. The specific function of the CBC element 406 or 605 is to convert the message set delivery information to such a format that the mobile network is able to • V deliver the message set to certain geographical areas. CBC element

: T: So, for example, you need to change the GPS coordinates to cell tags in order to CBC

....: 406 can deliver a message set via RNC element and base station to mobile stations in a specific:, 25 cell.

;; :: The invention has many different uses and uses.

• · 'Road users can therefore be provided with a more local \: targeted traffic information program. It is a good idea to distribute the program in audio format so that road users can follow the traffic while listening to 30 programs.

. · · ·. At festival and concert events, it is worthwhile to convey pictures as the ':' sound comes from the stage speakers anyway. This way, people who are far from the stage can also follow the performers' expressions and actions.

·: * ·: If multiple images, such as MMS images, are displayed sequentially, you can; . 35 a video-like presentation. Of course, in addition to audio, video and video, [it is possible to convey a textual presentation.

12 116653

In public events such as concerts, people following the broadcast can be expected to remain in the same cell throughout the broadcast. Instead, motorists may move from one cell to another, which may need to be taken into account when implementing the broadcast. In this case, broadcast 5 is advantageously implemented in a plurality of adjacent cells, whereby broadcasting continues in the driver's terminal even if the cell is switched between broadcasts. Cell switching is likely to cause short-term interference with the broadcast.

The invention can also be used to implement a point-to-multipoint network within a public network, in which case the code required for receiving the broadcast is only available to the persons for whom the private network is intended. or in encrypted form via the BCH, such as a taxi company private network or an authority network for public authorities.

FIG. 8 shows an example of a virtual network including a storage unit. Suppose the virtual network is used by a taxi company or, more specifically, by an employee of a taxi company who informs taxis of the address where a taxi is needed. The employee in question dictates the address and customer number through the subscriber line 801 and the fixed network 802 to the storage unit 803. In its simplest form, the storage unit is a digital answering machine. The control unit 804 then sends a dictation 805 to the CBC-: V element 806. At this point, the dictation is received through the storage unit: and placed (as a message set) in the data store 807. In response to the received. 25, the RNC- ?; V element 809 corresponds to the RNC element 409, the base station 810 corresponds to the base station 410, the dictation corresponds to the audio clip 401 and the dictation distribution steps. 809, 811, and 814 correspond to steps 409, 411, and 414, respectively, of distributing the audio clip. Recording unit 803 may be located in the same location as; · *; 30 CBC element, but it is usually cheaper to use only one storage ·· *. fetuses located at a location different from the CBC element (s).

'! * There may be several CBC elements involved in dictation distribution, but there is one (or two in case of failure) of control units 804. Each *: ··: CBC element may have its own repository 807 in its disk or main memory 35, or alternatively the same repository may be used by multiple CBC elements. The storage unit 803 and the control unit 804 should communicate with the central unit 1346653 so that the control unit knows that the dictation is in the data warehouse and that it must send a message 805 to the CBC element. FIG. 8 omits the UI user, i.e. the taxi operator. For example, through this web-based interface, employee 5 can create a list of the geographical areas to which the dictation (s) will be delivered. The list serves as a billing basis when taxi companies are charged for using a virtual network. In addition, the employee can create a list of taxi company mobile numbers, which are provided with a decryption key, for example by SMS. For example, the same decryption key can be used for a month.

10 A broadcast channel may be operated by a single entity, such as a taxi company, but a broadcast channel may also be shared, that is, by multiple entities. In this case, said taxi employee may be given a busy voice when calling a specific telephone number where dictation is made. When the previous broadcast is over, the employee can give his dictation. The control unit 15 k0 804 monitors the use of the storage unit 803. This may mean, for example, that the recording unit only receives calls from certain telephone numbers.

If necessary, the broadcast channel may be contractually assigned to a single party for private use, or may be temporarily assigned to a particular party for private use on the basis of a priority classification. Thus, the virtual network can be implemented as a virtual private network (VPN).

: ': FIG. 9 shows an example of a virtual network including an on-line unit. Assume that the fire chief commits, on the basis of a priority classification, a broadcast channel for private use by the fire department. . 25 command their firefighters at the scene of the accident. Fire chief talking about travel ;; V to his communicator 901, from which his speech is transmitted through the base station 910 of the mobile network 902 and the virtual network to the firefighters' mobile stations, and through the button: headset to be heard by the firefighters. In Figure 9, mobile stations 912 and 913 are used by firefighters. More specifically, the fire master's speech 30 moves from the mobile network 902 to the on-line -! ··, unit 903 of the virtual network, which splits the speech, or bitstream, into message sets and places! * message sets to data warehouse 904. The control unit 905 monitors the operation of the on-line unit and sends a notification 907 to CBC element 906 when a new message set is to be placed in the data warehouse to be delivered to the firefighters' mobile stations. Thereafter, the operation of the virtual network corresponds to the operation of * »t» »'shown in Figure 4.

• »14 116653

The invention is particularly well suited for WCDMA networks and for distributing MMS format message content. However, one skilled in the art will appreciate that the invention can be utilized in other networks based on code division multiplexing. It is also clear that the content / broadcast need not be in MMS format. Broadcasting can be speech / audio in digital form or video, audio, text or other data such as IP (Internet Protocol) or DVB (Digital Video Broadcasting).

By combining the teachings of this patent application and its examples, one skilled in the art can design and implement a plurality of broadcast networks and / or virtual networks within the scope of the invention.

Claims (20)

A method for implementing a broadcast in a predetermined geographical area on a mobile network using code division multiplexing, characterized in that the control unit locates (501) a message set containing at least one message and associated with said broadcast and transmits (502) a message related to the Cell Broadcast Via a Broadcast Center element, at least one base station located in the geographical area 10, from which, as a result of the notification, the code associated with receiving the message set and code division channeling is transmitted to the mobile stations via the first channel; establishing (504) a multicast connection from the first code-receiving mobile station and the second code-receiving mobile station 15 on the second channel indicating the received code to the transmitting base station and the base station to the Cell Broadcast Center element; and by the control unit reading (505) a message set from the data store to the Cell Broadcast Center element and transmitting a message set (506) from the Cell Broadcast Center element {v. through a multipoint connection to the first and second mobile stations. . ·. A method according to claim 1, characterized in that the message set includes the entire broadcast. The method of claim 1, characterized in that the message set includes a real-time portion of the broadcast. A method according to claim 1, characterized in that the first channel is a second channel: Broadcast Channel (BCH), Forward-Access Channel (FACH). A method according to claim 1, characterized in that the second channel is one of the channels: Downlink Shared Channel (DSCH), i t '. High-speed Downlink Shared Channel (HS-DSCH). . 6. A method according to claim 1, characterized in that said code associated with receiving the message set and code division multiplexing is transmitted to the mobile stations in encrypted form. : ': 35 ie 1,16653 7. A method according to claim 6, characterized in that a decryption key is stored on the first and second mobile stations, by means of which the encryption of the code associated with receiving the message set and code division can be opened. A method according to claim 6, characterized in that the network elements involved in implementing the broadcast form a private network. A system for implementing a broadcast in a predetermined geographical area in a mobile network 10 using code division multiplexing, characterized in that the system is adapted to place at least one message set (602) associated with said broadcast in a data storage (603) used by the system and transmit a control unit (601). ), via a Cell Broadcast Center element (605) according to the Cell Broadcast Service, at least one base station located in the geographical area, which message is sent a code (606) related to the message set and the code division multiplexing. for coffee means (607, 608) through a first channel; : ·. ·. with the system additionally configured. * ·: ·. forming a first mobile station (607) receiving the code and a second mobile station (607) receiving the code. , (608) a multipoint connection (609) on a second channel, indicated by a code, to the base station transmitting the code: 25 to the Cell Broadcast Center: · * element (605), in addition, the control unit (601) is adapted to read (610) from the data store (602). 603) to the Cell Broadcast Center element (605) and i * to transmit a message set (602) from the Cell Broadcast Center element 30 (605) through a multipoint connection (609) to the first (607) and second (608) mobile stations. A system according to claim 9, characterized in that the message set (602) includes the entire broadcast. The system of claim 9, characterized in that: "': 35 that the message set (602) includes a real-time portion of the broadcast. I · I 17 1 1 6653 A system according to claim 9, characterized in that the first channel is a second channel: Broadcast Channel (BCH), Forward-Access Channel (FACH). A system according to claim 9, characterized in that the second channel is one of the channels: Downlink Shared Channel (DSCH), High Speed Downlink Shared Channel (HS-DSCH). The system of claim 9, characterized in that said code (606) associated with receiving the message set and code division multiplexing is transmitted to the mobile stations (607, 608) in encrypted form. The system of claim 14, characterized in that a decryption key is stored on the first (607) and the second (608) mobile stations, by means of which the code (606) associated with receiving the message set and code division multiplexing can be decrypted. 15 1 1 6653 The system of claim 14, characterized in that the network elements involved in implementing the broadcast form a private network. The system of claim 10, characterized in that the system includes a recording unit adapted to receive the entire broadcast at once. The system of claim 17, characterized in that one of the system components: a control unit (601), a recording unit (803),! is adapted »to convert the received broadcast into a message set and to place the message set in the repository. : 25 The system of claim 11, characterized in that the system includes an on-line unit adapted to receive the real-time portion of the broadcast. The system of claim 19, characterized in that one of the system components: a control unit (601), an on-line unit 30 (903), is adapted to: convert the received broadcast into a message set, and 'to put a thread in the repository. 1 * 1 116653