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WO2001069846A2 - Procede et dispositif pour la distribution de donnees sans fil - Google Patents

Procede et dispositif pour la distribution de donnees sans fil Download PDF

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Publication number
WO2001069846A2
WO2001069846A2 PCT/BE2001/000045 BE0100045W WO0169846A2 WO 2001069846 A2 WO2001069846 A2 WO 2001069846A2 BE 0100045 W BE0100045 W BE 0100045W WO 0169846 A2 WO0169846 A2 WO 0169846A2
Authority
WO
WIPO (PCT)
Prior art keywords
data
users
specific
specific data
general
Prior art date
Application number
PCT/BE2001/000045
Other languages
English (en)
Other versions
WO2001069846A3 (fr
Inventor
Bart Lucien René PLACKLÉ
Original Assignee
Acunia, Naamloze Vennootschap
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Acunia, Naamloze Vennootschap filed Critical Acunia, Naamloze Vennootschap
Priority to AU2001239033A priority Critical patent/AU2001239033A1/en
Publication of WO2001069846A2 publication Critical patent/WO2001069846A2/fr
Publication of WO2001069846A3 publication Critical patent/WO2001069846A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H04W12/033—Protecting confidentiality, e.g. by encryption of the user plane, e.g. user's traffic

Definitions

  • This invention relates to a method and device for wireless data distribution.
  • the invention relates to transferring, on one hand, general data or information to a major group of users and, on the other hand, specific data or information which only is intended for one or more specific users from the aforementioned group.
  • the invention relates to a method and device for wireless distribution of executable data, so- called “executable code” or “programma code”, as well as of direct user information.
  • Such "multicast" of common digital information requires large databases and a complex management system in order to register which user already has received which information correctly. It is difficult to apply this latter on a larger scale, as the complexity of the management system grows when one starts working with subgroups and/or if the number of users grows.
  • the present invention aims at a novel kind of method and device for wireless data distribution which allows to transmit information in a fast and economic manner, on one hand, general information for all users of a major group and, on the other hand, specific information for certain users of the aforementioned group, whereby by said users, also subgroups may be understood.
  • the second place according to a preferred form of embodiment, it also aims at a solution for the disadvantages of the aforementioned known systems.
  • the invention in the first place relates to a method for wireless data distribution, with as a characteristic that the data are divided in, on one hand, general data intended for a major group of users and, on the other hand, specific data intended for one or more specific users from the aforementioned group; that the general data and specific data are sent wireless in the shape of one data stream, from a basic system to the users; and that at the users 7 of the specific data, by means of filtering, the specific data concerned are made available, whereas the general data are made available to all users.
  • At least a number of the specific data, and even better all specific data are sent repetitively, and that a well-defined number of times.
  • the specific data will arrive at the users' with a large certainty, as a consequence of which there is no longer a necessity of a bidirectional connection for a confirmation of the receipt by the user, and at the same time a management system is made more simple or even redundant.
  • the so-called “quality of service” By changing the number of times of repetitively sending the data, the so-called “quality of service”, with which the probability is meant with which all users receive the specific data, can be adapted. An increase of the number results in a larger “quality of service” .
  • the general data can be transmitted once as well as repetitively. When they are transmitted once, an optimum capacity remains present for repetitively transmitting the specific data sent in between. In case that both are transmitted repetitively, for the different kinds of data, general and specific, respectively, a separately adapted repetition frequency can be applied or even a repetitive pattern within one cycle, in other words, some blocks can be transmitted several times within one cycle.
  • the data will be transmitted according to a broadcast or multicast principle.
  • the specific data are transmitted in encrypted form, and at the users' of the specific data, by means of a decoding of the specific data, exclusively the specific data to which the users have access are let through to them, whereas the general data remain accessible for all users.
  • the specific data obtain an individual character.
  • the encoding of the specific information may take place in any manner. It can take place, for example, by means of a codification, as a result of which it suffices for the users to have a code in order to gain access to the specific data, or certain specific data. This can also take place by means of encrypting, whereby at the user's side, a deciphering of the encrypted specific data must take place in order to get access thereto. Further, the encoding may also be based on a combination of both techniques, thus, on one hand, codification and, on the other hand, encryption.
  • the invention does not exclude the use of a bidirectional connection, however, preferably will apply the latter for other purposes than those known from the systems known up to the present.
  • a bidirectional connection preferably will apply the latter for other purposes than those known from the systems known up to the present.
  • the bidirectional connection preferably is not used for confirm- ing the receipt of the specific data.
  • bidirectional connection is applied exclusively for basic data, it does not have to be permanently active, as a result of which, seen in total, the bidirectional connections do not have a disadvantageous influence on the capacity of the entire system.
  • such system can also be applied by broadcasting the new keys to certain groups by means of old keys.
  • new data streams related to the previous, such as upgrades, new services and such, can also be received.
  • the invention is related to transmitting information to vehicles.
  • a variety of applications can be aimed at. So, for example, may the general data consist of radio signals of a radio station, whereas the specific data are formed by reports which are intended exclusively for one or more users.
  • the specific data shall comprise at least executable data by means of which a new functionality is downloaded at the users'.
  • Meta-data comprising information related to the other data or, thus, the general or specific data, such as, amongst others, the size, the used compression, etc.
  • the invention also relates to a device for wireless data distribution, whereby the aforementioned method is realized.
  • this device at least consists of means which divide the data in, on one hand, general data destined for a major group of users and, on the other hand, specific data intended for one or more specific users of the aforementioned group; means for wireless transmitting the general data and ⁇ specific data in the form of one data stream, from a basic system to the users; and means situated at the users' of the specific data, as a result of which the specific data are made available to the users thereof.
  • the basic system comprises means for encoding the specific data before the transmission thereof, whereas the general data remain un-encoded, whereby at least a number of users have means available for decoding the specific data destined for them.
  • the basic system comprises means providing for that at least a number of the specific or general data is transmitted repetitively, possibly with varying parameters, such as, amongst others, the repetition frequency and the like.
  • the users will be formed by modules which are built-in in vehicles and which are intended for providing information for the users of the vehicles.
  • figure 1 schematically represents a device according to the invention
  • figure 2 schematically represents a so-called frame of the data stream transmitted according to the invention.
  • the device 1 comprises a basic system 2, such as a central station which is provided with the necessary transmission and possibly receiving means, as well as users 3A-3B-3C-... , which mostly will be subgroups of users, which, in the represented example, each are represented schematically as one module, which, for example, each are built-in in a vehicle.
  • a basic system 2 such as a central station which is provided with the necessary transmission and possibly receiving means, as well as users 3A-3B-3C-... , which mostly will be subgroups of users, which, in the represented example, each are represented schematically as one module, which, for example, each are built-in in a vehicle.
  • the device 1, and more particularly the basic system 2 comprises means 4, such as an appropriate computer unit, which divide the data to be transmitted into, on one hand, general data A destined for a major group of users, more particularly all of the aforementioned users 3A-3B-3C-... and, on the other hand, specific data S1-S2-... intended for one or more specific users from the aforementioned group.
  • the specific information SI is intended for user
  • the device 1 comprises means for wireless transmission of the general data A and specific data Sl- S2-... in the shape of one data stream 5, from the basic system 2 to the users 3A-3B-3C-... These means can form part of the computer unit 4 and further also comprise the not-represented transmission and receiving apparatus for realizing a wireless connection.
  • the specific data S1-S2-... are encoded in the basic system, whereas the general data A remain un-encoded.
  • the specific data destined for the latter are decoded.
  • the means 6 exclusively accept those specific data which may be transmitted further to the respective user.
  • FIG. 5 schematically represents a possible design, or so-called "framing", of the data stream 5.
  • each frame 8 thereby comprises at least two groups of signals, on one hand, a group comprising the general data A and, on the other hand, a group comprising the specific data S1-S2-...
  • other data parts 9-10 can be incorporated, amongst which a "frame code check" and such.
  • the number of repetitions can be chosen in function of the desired certainty with which the data have to arrive. This number then also determines the reliability of the connection.
  • An advantage therewith is that the reliability is independent from the number of users.
  • the first example relates to an application whereby a moderate data volume is transmitted.
  • the total data volume is 1 Mbyte, whereby 1 Mbyte in this case is equal to 8 Mbit;
  • the wireless transmission medium has a bandwidth of 100 kbit per second;
  • the average size of the service data or specific data S1-S2- is 100 kbit;
  • the number of "services" is 80, to wit 8Mbit/100 kbit; - it is assumed that all service data SI, S2, etc. are transmitted with the same parameters in respect to reliability, thus, with the same repetition.
  • SI, S2, etc., respectively is not received after 8 minutes, is smaller than le -7 , and this mde- pendently from the number of vehicles.
  • the second example relates to an application with larger volumes .
  • the total data volume is 100 Mbyte or thus, in the case that l byte is equal to 8 bits, 800 Mbit; the wireless transmission medium has a bandwidth of 1 Mbit per second; - the probability "F" of a false block at a size of
  • 1 kbit is le " ; - 50% of the total bandwidth are preserved for other services than transmitting the aforemen- tioned specific data; the average size of the service data or specific data S1-S2-... is 100 kbit; the number of "services" is 8000; - it is assumed that all service data SI, S2, etc. are transmitted with the same parameters in respect to reliability, thus, with the same repetition.
  • the data may be compressed.
  • the data may also comprise authentication information, whether or not combined with an encoding of data. It is also possible to apply for each data block, more particularly the specific data and the general data, a different repetition frequency, which possibly may vary in time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé pour la distribution de données sans fil, caractérisé en ce que les données sont divisées, d'une part, en données générales (A) destinées à un groupe principal d'utilisateurs (3A-3B-3C-... ) et, d'autre part, en données spécifiques (S1-S2-... ) destinés à un ou plusieurs utilisateurs plus spécifiques (3A-3B-3C- ) sélectionnés dans le groupe mentionné précédemment ; les données générales (A) et les données spécifiques (S1-S2-... ) sont transmises sans fil sous la forme d'un flux de données (5), entre un système de base (2) et les utilisateurs (3A-3B-3C-... ) ; les données spécifiques (S1-S2-... ) sont mises à disposition des utilisateurs (3A-3B-3C-... ) de ces données spécifiques (S1-S2-... ), au moyen d'un filtrage, tandis que les données générales (A) sont mises à disposition de tous les utilisateurs (3A-3B-3C-... ).
PCT/BE2001/000045 2000-03-15 2001-03-14 Procede et dispositif pour la distribution de donnees sans fil WO2001069846A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001239033A AU2001239033A1 (en) 2000-03-15 2001-03-14 Method and device for wireless date distribution

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2000/0199A BE1013351A3 (nl) 2000-03-15 2000-03-15 Werkwijze en inrichting voor het draadloos verdelen van data.
BE2000/0199 2000-03-15

Publications (2)

Publication Number Publication Date
WO2001069846A2 true WO2001069846A2 (fr) 2001-09-20
WO2001069846A3 WO2001069846A3 (fr) 2002-06-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BE2001/000045 WO2001069846A2 (fr) 2000-03-15 2001-03-14 Procede et dispositif pour la distribution de donnees sans fil

Country Status (3)

Country Link
AU (1) AU2001239033A1 (fr)
BE (1) BE1013351A3 (fr)
WO (1) WO2001069846A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003036911A3 (fr) * 2001-10-24 2003-06-05 Qualcomm Inc Procede et appareil de transport de paquets de donnees dans un systeme de communication sans fil utilisant un protocole internet

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577086A1 (fr) * 1985-01-31 1986-08-08 Data Telecommunications Sa Procede de diffusion de donnees par un organisme a un ou plusieurs destinataires et systeme pour la mise en oeuvre de ce procede
DE4018951A1 (de) * 1990-06-13 1991-12-19 Bosch Gmbh Robert Verfahren zur selektiven rufuebertragung und rufempfaenger zur durchfuehrung des verfahrens
JPH07231309A (ja) * 1994-02-17 1995-08-29 Hitachi Ltd 情報配信システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003036911A3 (fr) * 2001-10-24 2003-06-05 Qualcomm Inc Procede et appareil de transport de paquets de donnees dans un systeme de communication sans fil utilisant un protocole internet

Also Published As

Publication number Publication date
AU2001239033A1 (en) 2001-09-24
WO2001069846A3 (fr) 2002-06-20
BE1013351A3 (nl) 2001-12-04

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