EP1195929B1 - Système pour la transmission de données vers une pluralité de récepteurs utilisant la transmission directe par satellite - Google Patents

Système pour la transmission de données vers une pluralité de récepteurs utilisant la transmission directe par satellite Download PDF

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Publication number
EP1195929B1
EP1195929B1 EP00121336A EP00121336A EP1195929B1 EP 1195929 B1 EP1195929 B1 EP 1195929B1 EP 00121336 A EP00121336 A EP 00121336A EP 00121336 A EP00121336 A EP 00121336A EP 1195929 B1 EP1195929 B1 EP 1195929B1
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EP
European Patent Office
Prior art keywords
channel
data
index
transmission
contents
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EP00121336A
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German (de)
English (en)
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EP1195929A1 (fr
Inventor
Vu Tien Khang
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SES Astra SA
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SES Astra SA
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Priority to EP00121336A priority Critical patent/EP1195929B1/fr
Application filed by SES Astra SA filed Critical SES Astra SA
Priority to AT00121336T priority patent/ATE297616T1/de
Priority to ES00121336T priority patent/ES2243187T3/es
Priority to PT00121336T priority patent/PT1195929E/pt
Priority to DK00121336T priority patent/DK1195929T3/da
Priority to DE60020708T priority patent/DE60020708T2/de
Priority to ARP010104713A priority patent/AR036004A1/es
Publication of EP1195929A1 publication Critical patent/EP1195929A1/fr
Priority to HK02104594.0A priority patent/HK1043264B/zh
Application granted granted Critical
Publication of EP1195929B1 publication Critical patent/EP1195929B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving

Definitions

  • the invention refers to a system for distributing data from a transmission station to a plurality of user stations over a transmission channel having a predetermined bandwidth. Furthermore, the invention refers to a transmission station, a user station, a transmission method, a receiving method and a method for distributing data.
  • WO9750250 discloses a direct broadcast satellite system for providing video-on-demand and interactive services, in order to permit use of both direct and broadcasting satellite technology, and terrestrial ISDN facilities to provide interactive multimedia and emulated video-on-demand (VOD) services to residential consumers.
  • the system has a terrestrial base station and antenna for receiving number of programs in encoded format from a satellite system, a decoder coupled to mass storage device and a programmed processor for selecting programs to be stored.
  • the system for providing at least near video-on-demand has a multimedia server for providing a source of program material.
  • a satellite communications system broadcasts the program material to a number of users.
  • At least one receiving station has an antenna for receiving a number of programs in the form of encoded satellite signals.
  • a decoder decodes the signals.
  • a mass storage device stores at least some of the programs.
  • a programmed processor determines which of the programs to be stored based on criteria selected by the user.
  • a terrestrial link is provided between the multimedia server to at least one receiver for carrying
  • WO 93/09631 A discloses an information transmission system for broadcasting digital information in order to provide large number of subscribers access to centrally stored information.
  • the system has a hierarchically arranged set of indices for referencing the data in the computer memories of the central server.
  • the transmission of the data is scheduled in selected portions.
  • the selected portions are prioritised into set of tiers.
  • multiple transmission channels are used for which special scheduling messages are transmitted indicating the approximate time that the requested information will be transmitted and the transmission channel that will be used.
  • US 5790935 discloses a digital information system for delivering virtual on-demand information from a central distribution server to a plurality of local servers over a broadcast channel.
  • a return channel is provided to transmit subscribers' requests from each local server to the central distribution server.
  • a collaborative filtering system with the central distribution server synthesizes the subscribers' requests and produces a list of so-called recommended items for each subscriber.
  • a scheduling processor within the central distribution server merges the list of recommended items to prioritise the items from the most to the least frequently recommended and places identifiers for these items in a refresh queue for broadcast over the broadcast channel.
  • the recommended items reach the top of the refresh queue they are retrieved from a central storage and are broadcast to the local servers, preferably during off-peak hours.
  • the central distribution server broadcasts items in response to direct subscriber requests which take priority over the broadcast of the recommended items.
  • a DTH (Direct To Home) satellite broadcasting system might be advantageous to enable Internet access to a plurality of users.
  • a DVB (Digital Video Broadcast) satellite may deliver data at very high speed (up to 38 Mbps) to all users equipped with an antenna of a diameter as small as 50 cm, requiring them to use only a slow-speed terrestrial modem as a return channel.
  • a system for distributing data subsets from a transmission station to a plurality of user stations has a transmission channel with a predetermined bandwidth comprising a contents channel and an announcement channel
  • the transmission station comprises a server, which is arranged to prepare a list of data subsets to be transmitted and which is arranged to create for each data subset an index containing a description of said data subset, wherein each index is transmitted over the announcement channel and each data subset is transmitted over the contents channel, and wherein each index transmitted over the announcement channel controls the transmission of the corresponding data subset over the contents channel such that each index of the announcement channel is a description of a future data subset to be transmitted over the contents channel
  • each of the plurality of user stations comprises a local advisor application and a local storage, wherein the local advisor application is arranged to appoint a user profile specifying the data subsets of interest to a user and is arranged to download data subsets from the contents channel to the local storage in accordance with a predetermined quality of matching between the index and
  • the transmission channel comprises besides a contents channel an announcement channel over which an index of future data subsets is transmitted.
  • This index allows the end user to automatically download the data subsets of interest and to estimate the delay of transmission to the next data subset of interest.
  • This principle can be compared with the transmission of television data over a broadcast channel. Equally, the amount of television data is too much to be transmitted at once to all end users. Instead, certain data subsets (normally a few television channels or television movies) are transmitted at once.
  • an "announcement channel” namely the television program for the next weeks which is published in several television magazines. From this information the user can also automatically download certain television movies on his video tape by programming his video tape accordingly.
  • a system formed in accordance with the invention has a number of advantages. First of all, a large user base can be acquired on a worldwide basis, so that an advertisement paid and free access system can be achieved. Furthermore, the approach according to the invention introduces new sophisticated media to the end user which will stimulate the multimedia market even further.
  • the transmission channel is a satellite broadcast channel.
  • the data to be distributed are Internet data and/or multimedia data.
  • the user station is a computer or any other electronic appliance with equivalent capabilities comprising a receiving equipment for receiving the transmission channel, wherein the receiving equipment automatically downloads the required data subset in accordance with the user profile.
  • a return channel is provided from at least some of the user stations to the transmission station for enabling the corresponding user to exchange data interactively. For example, it is then possible for the user to perform some searching in the Internet or to do some interactive transaction in e-commerce.
  • the return channel can be a slow terrestrial phone modem, ISDN, cable modem, xDSL, or can be also a satellite return channel, if necessary.
  • any Internet link can be used.
  • a vote channel is provided from at least some of the user stations to the transmission station for enabling the user to transmit a vote for a specific data subset to the transmission station, wherein a selection unit is provided in the transmission station for selecting the next data subset to be transmitted in accordance with the received votes.
  • "Voting" in the sense of the present invention means to influence the data subsets to be transmitted next.
  • a vote of a user will be included in the competition process for the bandwidth of the contents channel in the future rounds of webcasting. The most popular data subsets will win and will be included in the next transmission round.
  • the vote channel is part of the return channel and/or preferably the vote channel is a telephone line.
  • the vote channel is constituted by an Internet link in several layers.
  • a payment channel is provided between at least some of the user stations and the transmission station.
  • the payment channel can also be part of the return channel and/or preferably is a telephone line.
  • the vote channel is constituted by an Internet link in several layers.
  • an evaluation unit is provided in the transmission unit for evaluating a certain payment. Accordingly, a vote-related payment gives a specific vote of the user priority over free votes. Furthermore, a bandwidth-related payment decreases the transmission delay for requested data to be transmitted.
  • the transmission channel might comprise a service channel which connects an encoder in the transmission station and a decoder in a user station.
  • the decoder might be a so-called "set-top box", providing a combination of pre-services and paid services or services on demand.
  • the service channel is only accessible after a certain payment for requesting and/or receiving on-demand services. The payment can be carried out via the above-mentioned payment channel or can be fulfilled by the transaction of a lump sum.
  • an auxiliary channel for alternatively distributing data to a user station which cannot be distributed over the transmission channel due to limited bandwidth.
  • the auxiliary channel can be a telephone line to the corresponding Internet Service Provider.
  • the auxiliary channel gives then a backup possibility to access Internet data which are not available in the local storage of the user and are not being ready to be fetched from the contents channel.
  • a local advisor application is provided in the user station for managing the data access to show the users which data are available on the local cache, which data are not on the local cache, but are in the announcement channel ready to be fetched, and which data have to be downloaded from the auxiliary channel.
  • the invention comprises also a transmission station for distributing data, a user station for receiving data, a method for distributing data, a transmission method for distributing data and a receiving method for receiving data, for which individual protection is sought. It is understood that all aspects of the invention as described above also fully apply to these subject matters.
  • Fig. 1 shows a schematic diagram of a first embodiment of the invention.
  • a transmission station 105 is connected with satellite transmission antenna 101 for distributing data 111 over a transmission channel 104.
  • the uplink data of the transmission channel 104 are received by a satellite transponder 102 and are sent back to a region of interest on earth for reception by a user station 106.
  • the user station 106 is connected to a satellite receiver comprising a receiving antenna 103 having a diameter of about 50 cm.
  • the transmission station is connected to an Internet Service Provider 107 which gives access to Internet data 108.
  • the transmission station 105 and the Internet Service Provider 107 can be merged to one single unit, if this is advantageous.
  • the user station might be simply a home PC in which a DVB satellite reception card is installed.
  • the transmission channel 104 comprises two channels, namely a contents channel 109 and an announcement channel 110.
  • internet data are transmitted which are currently selected by the transmission station 105, wherein over the announcement channel 110 an index is transmitted containing description of future data subsets to be transmitted over the contents channel 109.
  • a local advisor application might be installed in the user station for managing the reception of certain Internet data and for specifying the user profile, for example by dragging-and-dropping some icons in a bucket. The local advisor application uses this information in association with descriptions in the announcement channel to select from the contents channel the Internet pages which are closest to the interest of the user and stores them in the local storage of the user station 106.
  • the local advisor application automatically displays clickable links to pages already available locally in the user station 106 or warns about pages that are announced, but are not yet received.
  • the local advisor application is actually a personal meta-search tool that operates on the PC local storage space and searches in pages described in advance in a multicast announcement channel.
  • the local advisor application updates also updates continuously the user profile of the user on the basis of keywords which have been recently used for a search in the Internet and/or the description of the contents that was captured and watched.
  • the local advisor application installed on the user station 106 can also be used to display an advertisement which fits ideally to the user profile. This advertisement was also webcasted via the contents channel 109 and was selected from other advertisements for local storage in the user station 106 similar to the selection of the Internet pages as described above.
  • Fig. 1 offers a usage of the transmitted Internet data without any return channel, so that the reception is purely passive. All intelligence and selection of the Internet data happens locally. The user is free to remain unknown to the webcaster of the transmission station 105, but can only consult web pages that are decided for webcasting by the transmission station.
  • Fig. 2 shows the principle for appointing a user profile according to the invention.
  • a local advisor application might be installed in the user station 106 in order to automatically select the Internet pages that are of interest to the user.
  • the transmission station 105 has to perform a selection of those Internet pages to be transmitted which are of interest to the maximum number of users.
  • a proximity measurement is performed in a multi-dimensional vector space 202.
  • Each end user is represented by a point 201 whose coordinates in the multi-dimensional vector space 202 weighs the preferences of this end user for a set of keywords.
  • Each Internet page may also be represented by another point 203 in the same hyper space 202. Examples of keywords could be "business", "tourism” etc.
  • Fig. 3 shows a schematic diagram of a second embodiment of the invention.
  • the difference to the first embodiment is that a return channel 301 is provided from the user station 106 to the transmission station 105, wherein a local modem 302 is installed in the user station for this purpose.
  • the webcaster in the transmission station 105 might provide special services for the return channel 301 in order to communicate interactively with the Internet pages received via the contents channel 109. In particular, e-commerce interactive transaction might be performed via the return channel 301.
  • Fig. 4 shows a schematic diagram of a third embodiment of the invention.
  • the difference with regard to the second embodiment according to Fig. 3 lies in the fact that additionally a vote channel 401 is provided between the user station 106 and the transmission station 105.
  • the return channel 301 and the vote channel 401 might be merged in one telephone connection line.
  • the vote channel 401 enables the user to "vote" for Internet pages found on the Internet by the local advisor application.
  • the voted page will be included in the competition process for bandwidth selection in the transmission station 105, wherein the most popular Internet page will win the transmission in the future rounds.
  • the deal that may be proposed to the user is as such:
  • Fig. 5 shows a schematic diagram of a fourth embodiment according to the invention.
  • the difference with regard to the third embodiment is that a payment channel 501 is additionally provided between the user station 106 and the transmission station 105.
  • the payment channel 501 is designed bi-directional and might be realized in practice by one telephone line together with the return channel 301 and the vote channel 401.
  • the payment channel 501 can be used by the user to obtain some dedicated services and to specify specific needs as for example:
  • Fig. 6 shows a schematic diagram of a fifth embodiment of the invention.
  • the difference as to the fourth embodiment lies in the fact that there is an additional auxiliary channel 601 between the user station 106 and the Internet Service Provider 107.
  • a modem 602 is provided in the user station 106.
  • the modems 302 and 602 can be merged to a single modem.
  • the auxiliary channel enables an alternative access to the Internet 108, if the required Internet page is not available in the cache of the user station or is ready to be fetched from the contents channel 109.
  • the local advisor application which is installed in the user station, allows a smooth switching between surfing in the local cache of the user station and on-line surfing in the Internet 108 via the auxiliary channel 601.
  • the local advisor application may chose either to fetch it immediately from the Internet via the auxiliary channel 601 or "vote" for it via the voting channel 401 and wait for the next webcasting round and watch the content at the speed of disc access.
  • Fig. 7 shows a schematic diagram of a sixth embodiment of the invention.
  • the transmission channel 104 comprises additionally a service channel 701 which can be received by a "set-top box" 702 by the user station 106.
  • the data of the service channel 701 are encoded such that only a user having a set-top box 702 is able to receive the data of the service channel 701.
  • the service channel 701 together with the contents channel 109 provides a combination of free services and paid services, which can be accessed on demand by the user.
  • Each stage builds the user base for the next stage. At any given moment, the user is free to adopt a behaviour of one or other levels. At any level the user must feel that all the commercial actors introduced at this level are there to bring an added value.
  • Level 1 attracts the consumer by offering free reception of most popular Internet pages.
  • Level 2 averages the growing consumer space and satisfies a need by offering (always for free) the possibility to vote and influence the choice and broadcast the most popular Internet pages.
  • Level 3 is reached when the user feels that he has sufficiently of free services so that, occasionally, it is acceptable and convenient to pay to get some dedicated services.
  • level 4 applies when the three previous stages are wide-spread accepted. If this is reached, it becomes natural to the consumer to accept a more thorough form of webcasting in form of a multimedia set-top box.
  • Fig. 8 shows a schematic diagram of components related to the transmission channel. Signals are transmitted from the transmission station 801 via the contents channel 803 and the announcement channel 804 to the user station 802.
  • the transmission station comprises a webcast server 805, a means for transmitting the announcement 806, a webcast daemon 807 and a means for transfering the Internet files 808. Between the transmitting announcement 806 and the webcast daemon 807 is an arbitrary datalink 814, which might be wireless.
  • the user station comprises a means for receiving the anouncements 809, a webcast receiver 810, a daemon 811, a file transfer mechanism 812 and a data storage 813.
  • the file transfer mechanism 808 can be one of the many mechanisms that are available on the market or in the literature. Usually, these mechanisms simply broadcast any files that are put in a given directory by the webcast daemon 807, which is controlled by the announcement data (as does Microsoft Netshow®) . Some others may carry a more elaborate file announcement process with a list of intended receivers, to allow the receivers to prepare themselves for reception (as does StarBurst's MFTP).
  • the implementation uses a simple implementation that follows the TFTP protocol that is described on the Internet in a freely available document.
  • the means for transmitting announcement data 806 comprises modules doing the announcement of the multicast session, describing among others the next webcast rounds.
  • the announcement uses the XML (eXtended Markup Language) syntax, in order to allow for flexibility in the content of the announcement and keep a common denominator between several future webcasters/broadcasters.
  • daemons are used. These daemons are specific to each file transfer mechanism. They will listen to the announcements and react accordingly by feeding the file transfer applications with the commands they expect to receive.
  • the implementation of the announcement channel uses the formal description of the XML, which is a DTD (Document Type Description).
  • the content may vary depending on the depth of the characterization of the announcement.
  • Fig. 9 shows a schematic diagram of components related to the return channel.
  • the transmitted data via the transmission channel are received by a plurality of user stations 901, 902, 903 and 904.
  • the voting messages together with the profile of each user are aggregated by aggregation platforms 805, 906 and are collected at the webcasting platform 907, which communicates with the data broadcast platform 908.
  • the transmission again via satellite is already described above.
  • a voting mechanism is implemented on the return channel.
  • the voting mechanism in is the counterpart of the announcement. It allows the end-customer to "announce" to the webcaster what are his own preferences, in an anonymous manner or a weighted manner. Thus, the webcaster may decide which contents are of interest to the most people and deserves priority to be webcast.
  • This voting mechanism is used to carry the vote from the end-user back to the voting aggregator (usually his Internet Service Provider) to influence the webcasting content. It also carries the hit-reporting for successfully visited web pages. As such, its use is not mandatory when the end-user wishes only to "watch" anonymously the webcasting.
  • the vote carries the profile of the user, to give more weight to voters who have centers of interests that are close to the topics addressed by a web site. It also carries the hit reporting counts which is a fair practice when delivering cached contents.
  • This end-user voting protocol uses a TCP/IP return link between the end-user and his Internet Service Provider.
  • the design of the protocol does not force the transport used by the vote aggregator.
  • This transport could be either by FTP or (more securely) an SSL certificate-protected HTTP session.
  • the concern is not to be able to identify and track the user voter but rather to obtain a non-repudiation status of the vote, and thus track repeated votes, virus votes, intrusion votes, etc.
  • This vote is sent to the Internet Service Provider that the user is subscribed to, who is in charge of collecting the votes and forwarding the selected popular URL to the cache pre-fetch platform as soon as possible, to be weighted and aggregated for the next webcasting round.
  • This Internet Service Provider is also responsible of adjusting the display profiles of the advertisement banners and of uploading to the advertisement insert platform these ad banners (with their display profiles). It is very important to note that the individual user profiles should remain within the Internet Service Provider premises, and not used for anything else, in order to comply with legal rules under the most restrictive German laws.
  • the voting process is designed in such a way that it supports many levels of aggregation: the end-user may vote to his local Internet Service Provider (or his school or college) that may sum the votes up and forward them to a regional Internet Service Provider. The latter may again weight, sum and forward up any number of levels before coming to the pre-fetch platform. The pre-fetch platform will finally aggregate the votes and decide on the resulting popularity score of each URL.
  • the voting algorithm supports an open number of levels as follows. The simplest voting scheme would be to sum the number of times that a URL has been requested, to count its popularity. However, this would be able to discriminate only the scoring of homepages of the most well known sites.
  • This formula shows that each level of Internet Service Provider should simply do a vector sum of the voters' profiles.
  • the pre-fetch platform would fetch the URL content, index it and use the index to calculate the final score, to decide whether the URL is of enough interest to be cached and how frequently it should be webcast.
  • the current implementation of the voting channel uses the same XML principles to wrap the votes.
  • the following is an example.
  • the content may vary depending on the depth of the characterization of the announcement.

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  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Information Transfer Between Computers (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Radio Relay Systems (AREA)

Claims (32)

  1. Système pour distribuer des sous-ensembles de données depuis une station de transmission (105, 801) à une pluralité de stations utilisateurs (106, 802) sur un canal de transmission (104) ayant une largeur de bande prédéterminée et comprenant un canal de contenus (109, 804) et un canal d'annonce (110, 803),
    la station de transmission (105, 801) comprend une liaison de données (814) entre le canal d'annonce (110, 803) et le canal de contenus (109, 804) et comprend un serveur (805), qui est conçu pour préparer une liste des sous-ensembles de données qui doivent être transmis et qui est conçu pour créer pour chaque sous-ensemble de données un index contenant une description dudit sous-ensemble de données, dans lequel chaque index est transmis sur le canal d'annonce (110, 803) et chaque sous-ensemble de données est transmis sur le canal de contenus (109, 804) et un moyen pour commander via la liaison des données (814) la transmission du sous-ensemble de données correspondant sur le canal de contenus (109, 804) en réponse à chaque index étant transmis sur le canal d'annonce (110, 803), de sorte que chaque index du canal d'annonce (110, 803) est une description d'un sous-ensemble de données futur qui doit être transmis sur le canal de contenus (109, 804),
    chacune de la pluralité des stations utilisateurs comprend une application de consultation locale (810, 811, 812), un moyen pour recevoir les index (809) et un moyen pour recevoir les sous-ensembles de données (812) et une mémoire locale (813), dans laquelle pour chaque sous-ensemble de données un index contenant une description dudit sous-ensemble de données est reçu par le moyen pour recevoir les index (809) depuis le canal d'annonce (110, 803), dans lequel l'application de consultation locale (810, 811, 812) est conçue pour affecter un profil utilisateur spécifiant les sous-ensembles de données d'intérêt à un utilisateur et est conçue pour télécharger les sous-ensembles de données depuis le canal de contenus via le moyen pour recevoir les sous-ensembles de données (812) dans la mémoire locale (813) en conformité avec une qualité prédéterminée de correspondance entre chaque index correspondant et profil utilisateur.
  2. Système selon la revendication 1, dans lequel le canal de transmission est un canal de diffusion par satellite.
  3. Système selon l'une quelconque des revendications 1 à 2, dans lequel l'index du canal d'annonce est basé sur la syntaxe de eXtended Markup Language.
  4. Système selon l'une quelconque des revendications 1 à 3, dans lequel les données qui doivent être distribuées sont les données d'Internet et/ou des données multimédia.
  5. Système selon l'une quelconque des revendications 1 à 4, dans lequel chaque station utilisateur est un ordinateur comprenant un équipement de réception pour recevoir le canal de transmission.
  6. Système selon l'une quelconque des revendications 1 à 5, dans lequel la station de transmission est connectée à un fournisseur de service Internet qui procure l'accès aux données Internet.
  7. Système selon l'une quelconque des revendications 1 à 6, dans lequel l'index contient des informations pour estimer le délai de transmission au sous-ensemble de données suivant.
  8. Système selon l'une quelconque des revendications 1 à 7, dans lequel l'application de consultation locale met à jour continuellement le profil utilisateur sur la base de mots-clés qui ont été récemment utilisés pour une recherche dans la mémoire locale de la station utilisateur et/ou dans l'index du canal d'annonce.
  9. Système selon l'une quelconque des revendications 1 à 8, dans lequel un canal de retour est prévu pour au moins certaines des stations utilisateurs vers la station de transmission pour permettre à l'utilisateur correspondant d'échanger des données de manière interactive.
  10. Système selon la revendication 9, dans lequel le canal de retour est une ligne téléphonique ou une connexion Internet.
  11. Système selon l'une quelconque des revendications 1 à 10, dans lequel un canal de vote est prévu pour au moins certaines des stations utilisateurs vers la station de transmission pour permettre à l'utilisateur de transmettre un vote pour un sous-ensemble de données spécifiques à la station de transmission.
  12. Système selon la revendication 11, dans lequel la station de transmission comprend une unité de sélection qui est conçue pour inclure des votes entrants dans un processus de compétition pour la sélection de largeur de bande du canal de contenus de sorte que les sous-ensembles de données sont transmis sur le canal de contenus qui sont d'un intérêt au nombre maximal d'utilisateurs.
  13. Système selon l'une quelconque des revendications 9 à 10 et l'une quelconque des revendications 11 à 12, dans lequel le canal de vote est une partie du canal de retour.
  14. Système selon l'une quelconque des revendications 11 à 13, dans lequel le canal de vote est une ligne téléphonique ou une connexion Internet.
  15. Système selon l'une quelconque des revendications 1 à 14, dans lequel un canal de paiement est prévu entre au moins certaines des stations utilisateurs et la station de transmission.
  16. Système selon les revendications 9 et 15, dans lequel le canal de paiement est une partie du canal de retour.
  17. Système selon l'une quelconque des revendications 15 à 16, dans lequel le canal de paiement est une ligne téléphonique ou une connexion Internet.
  18. Système selon l'une quelconque des revendications 15 à 17, dans lequel une unité d'évaluation est prévue dans l'unité de transmission pour évaluer un certain paiement.
  19. Système selon les revendications 11 et 18, dans lequel un vote lié au paiement donne un vote spécifique de la priorité de l'utilisateur sur des votes libres.
  20. Système selon l'une quelconque des revendications 18 à 19, dans lequel un paiement lié à la largeur de bande diminue le délai de transmission pour que les données requises soient transmises.
  21. Système selon l'une quelconque des revendications 1 à 20, dans lequel le canal de transmission comprend un canal de service, qui connecte un codeur dans la station de transmission et un décodeur dans une station utilisateur.
  22. Système selon la revendication 21, dans lequel le canal de service est accessible après un certain paiement pour demander et/ou recevoir des services sur demande.
  23. Système selon l'une quelconque des revendications 1 à 22, dans lequel un canal auxiliaire est prévu pour distribuer alternativement les données à une station utilisateur, qui ne peut pas être distribué sur le canal de transmission dû à une largeur de bande limitée.
  24. Système selon la revendication 23, dans lequel le canal auxiliaire est une ligne téléphonique ou une connexion Internet.
  25. Système selon l'une quelconque des revendications 23 à 24, dans lequel l'application de consultation locale gère l'accès aux données pour les sous-ensembles de données déjà téléchargés depuis le canal de transmission dans la mémoire locale, pour les sous-ensembles de données annoncés dans l'index prêt à être téléchargés dans le futur et pour les données qui doivent être téléchargées à partir du canal auxiliaire.
  26. Système selon l'une quelconque des revendications 23 à 25, dans lequel l'application de consultation locale met à jour continuellement le profil utilisateur sur la base des mots-clés qui ont été récemment utilisés pour la recherche dans Internet via le canal auxiliaire.
  27. Système selon l'une quelconque des revendications 1 à 26, dans lequel la qualité prédéterminée de correspondance est déterminée par une mesure de proximité dans un espace vectoriel multidimensionnel entre le profil utilisateur et l'index, dans lequel à la fois le profil utilisateur et l'index sont représentés par un point dans l'espace vectoriel multidimensionnel dont les coordonnées sont données par un ensemble de mots-clés et dans lequel pour chaque index étant à l'intérieur d'une proximité prédéterminée, le sous-ensemble de données correspondant est téléchargé depuis le canal de contenus dans la mémoire locale.
  28. Station de transmission pour transmettre des sous-ensembles de données à une pluralité de stations utilisateurs (106, 802) sur un canal de transmission (104) ayant une largeur de bande prédéterminée et comprenant un canal de contenus (109, 804) et un canal d'annonce (110, 803),
    la station de transmission (105, 801) comprend une liaison de données (814) entre le canal d'annonce (110, 803) et le canal de contenus (109, 804) et comprend un serveur (805), qui est conçu pour préparer une liste de sous-ensembles de données qui doivent être transmis et qui est conçu pour créer pour chaque sous-ensemble de données un index contenant une description dudit sous-ensemble de données, dans lequel chaque index est transmis sur le canal d'annonce (110, 803) et chaque sous-ensemble de données est transmis sur le canal de contenus (109, 804), et un moyen pour commander via la liaison des données (814) la transmission du sous-ensemble de données correspondant sur le canal de contenus (109, 804) en réponse à chaque index étant transmis sur le canal d'annonce (110, 803), de sorte que chaque index du canal d'annonce (110, 803) est une description d'un sous-ensemble de données futur qui doit être transmis sur le canal de contenus (109, 804).
  29. Station utilisateur pour gérer la réception des sous-ensembles de données transmis en conformité avec le procédé de la revendication 31 sur un canal de transmission (104) ayant une largeur de bande prédéterminée et comprenant un canal de contenus (109, 804) et un canal d'annonce (110, 803),
    dans laquelle les sous-ensembles de données sont reçus à partir du canal de contenus (109, 804) et pour chaque sous-ensemble de données un index contenant une description dudit sous-ensemble de données est reçu depuis le canal d'annonce (110, 803) et dans laquelle chaque index du canal d'annonce (110, 803) est une description d'un sous-ensemble de données futur qui doit être reçu depuis le canal de contenus (109, 804),
    la station utilisateur comprend une application de consultation locale (810, 811, 812), un moyen pour recevoir les index (809) et un moyen pour recevoir les sous-ensembles de données (812) et une mémoire locale (813), dans laquelle pour chaque sous-ensemble de données un index contenant une description dudit sous-ensemble de données est reçu par le moyen pour recevoir les index (809) depuis le canal d'annonce (110, 803), dans laquelle l'application de consultation locale (810, 811, 812) est conçue pour affecter un profil utilisateur spécifiant les sous-ensembles de données d'intérêt à un utilisateur et est conçue pour télécharger les sous-ensembles de données depuis le canal de contenus via le moyen pour recevoir les sous-ensembles de données (812) dans la mémoire locale (813) en conformité avec une qualité prédéterminée de correspondance entre chaque index correspondant et le profil utilisateur.
  30. Procédé pour distribuer des sous-ensembles de données depuis une station de transmission (105, 801) à une pluralité des stations utilisateurs (106, 802) sur un canal de transmission (104) ayant une largeur de bande prédéterminée et comprenant un canal de contenus (109, 804) et un canal d'annonce (110, 803), dans lequel entre le canal d'annonce (110, 803) et le canal de contenus (109, 804) une liaison de données (814) est prévue,
    préparer une liste de sous-ensembles de données qui doivent être transmis et créer pour chaque sous-ensemble de données un index contenant une description dudit sous-ensemble de données, dans lequel chaque index est transmis sur le canal d'annonce (110, 803) et chaque sous-ensemble de données est transmis sur le canal de contenus (109, 804), et dans lequel la transmission du sous-ensemble de données correspondant sur le canal de contenus (109, 804) est commandée via la liaison des données en réponse à chaque index étant transmis sur le canal d'annonce (110, 803) de sorte que chaque index du canal d'annonce (110, 803) est une description d'un sous-ensemble de données futur qui doit être transmis sur le canal de contenus (109, 804),
    recevoir pour chaque sous-ensemble de données un index contenant une description dudit sous-ensemble de données depuis le canal d'annonce (110, 803), affecter un profil utilisateur spécifiant les sous-ensembles de données d'intérêt à un utilisateur et télécharger les sous-ensembles de données depuis le canal de contenus dans la mémoire locale (813) en conformité avec une qualité prédéterminée de correspondance entre chaque index et profil utilisateur correspondant.
  31. Procédé de transmission pour transmettre des sous-ensembles de données depuis une station de transmission (105, 801) à une pluralité de stations utilisateurs (106, 802) sur un canal de transmission (104) ayant une largeur de bande prédéterminée et comprenant un canal de contenus (109, 804) et un canal d'annonce (110, 803),
    dans lequel entre le canal d'annonce (110, 803) et le canal de contenus (109, 804) une liaison de données (814) est prévue,
    préparer une liste de sous-ensembles de données qui doivent être transmis et créés pour chaque sous-ensemble de données à un index contenant une description dudit sous-ensemble de données, dans lequel chaque index est transmis sur le canal d'annonce (110, 803) et chaque sous-ensemble de données est transmis sur le canal de contenus (109, 804) et dans lequel la transmission du sous-ensemble de données correspondant sur le canal de contenus (109, 804) est commandée via la liaison des données en réponse à chaque index étant transmis sur le canal d'annonce (110, 803), de sorte que chaque index du canal d'annonce (110, 803) est une description d'un sous-ensemble de données futur qui doit être transmis sur le canal de ).
  32. Procédé de réception correspondant à des sous-ensembles de données transmis selon le procédé de la revendication 31 sur un canal de transmission (104) ayant une largeur de bande prédéterminée et comprenant un canal de contenus (109, 804) et un canal d'annonce (110, 803), dans lequel entre le canal d'annonce (110, 803) et le canal de contenus (109, 804) une liaison de données (814) est prévue,
    recevoir pour chaque sous-ensemble de données un index contenant une description dudit sous-ensemble de données depuis le canal d'annonce (110, 803),
    affecter un profil utilisateur spécifiant les sous-ensembles de données d'intérêt à un utilisateur et télécharger les sous-ensembles de données depuis le canal de contenus dans la mémoire locale (813) en conformité avec une qualité prédéterminée de correspondance entre chaque index et profil utilisateur correspondant.
EP00121336A 2000-10-09 2000-10-09 Système pour la transmission de données vers une pluralité de récepteurs utilisant la transmission directe par satellite Expired - Lifetime EP1195929B1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
AT00121336T ATE297616T1 (de) 2000-10-09 2000-10-09 System für die übertragung von daten zu mehreren empfängern mit verwendung der direktübertragung per satellit
ES00121336T ES2243187T3 (es) 2000-10-09 2000-10-09 Sistema para la transmision de datos a una pluralidad de receptores que utilizan la transmision directa por saletite.
PT00121336T PT1195929E (pt) 2000-10-09 2000-10-09 Sistema para emissao de dados a uma pluralidade de receptores atraves de uma transmissao directa para um satelite local
DK00121336T DK1195929T3 (da) 2000-10-09 2000-10-09 System til rundspredning af data til et antal modtagere via en direkte satellittransmission
EP00121336A EP1195929B1 (fr) 2000-10-09 2000-10-09 Système pour la transmission de données vers une pluralité de récepteurs utilisant la transmission directe par satellite
DE60020708T DE60020708T2 (de) 2000-10-09 2000-10-09 System für die Übertragung von Daten zu mehreren Empfängern mit Verwendung der Direktübertragung per Satellit
ARP010104713A AR036004A1 (es) 2000-10-09 2001-10-05 Metodo de transmision para distribuir informacion desde una estacion sobre un canal de transmision con un ancho de banda predeterminado, una estacion de transmision, una estacion de usuario y una disposicion para aplicar dicho metodo
HK02104594.0A HK1043264B (zh) 2000-10-09 2002-06-20 通過直接至家庭的衛星把資料廣播到多個接受器的系統

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00121336A EP1195929B1 (fr) 2000-10-09 2000-10-09 Système pour la transmission de données vers une pluralité de récepteurs utilisant la transmission directe par satellite

Publications (2)

Publication Number Publication Date
EP1195929A1 EP1195929A1 (fr) 2002-04-10
EP1195929B1 true EP1195929B1 (fr) 2005-06-08

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EP00121336A Expired - Lifetime EP1195929B1 (fr) 2000-10-09 2000-10-09 Système pour la transmission de données vers une pluralité de récepteurs utilisant la transmission directe par satellite

Country Status (8)

Country Link
EP (1) EP1195929B1 (fr)
AR (1) AR036004A1 (fr)
AT (1) ATE297616T1 (fr)
DE (1) DE60020708T2 (fr)
DK (1) DK1195929T3 (fr)
ES (1) ES2243187T3 (fr)
HK (1) HK1043264B (fr)
PT (1) PT1195929E (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2840480B1 (fr) * 2002-05-31 2004-11-26 Cit Alcatel Procede de gestion auto-adaptative de pertinence de contenus multimedia pour recepteur de ces contenus et recepteur associe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404505A (en) * 1991-11-01 1995-04-04 Finisar Corporation System for scheduling transmission of indexed and requested database tiers on demand at varying repetition rates
US5724521A (en) * 1994-11-03 1998-03-03 Intel Corporation Method and apparatus for providing electronic advertisements to end users in a consumer best-fit pricing manner
GB9822022D0 (en) * 1998-10-09 1998-12-02 Roke Manor Research Method and apparatus for receiving a media broadcast

Also Published As

Publication number Publication date
ES2243187T3 (es) 2005-12-01
DE60020708D1 (de) 2005-07-14
HK1043264A1 (en) 2002-09-06
ATE297616T1 (de) 2005-06-15
DE60020708T2 (de) 2006-06-14
EP1195929A1 (fr) 2002-04-10
HK1043264B (zh) 2005-09-30
AR036004A1 (es) 2004-08-04
DK1195929T3 (da) 2005-09-05
PT1195929E (pt) 2005-10-31

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