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WO2000049747A1 - Systeme et procede de gestion de temps et de largeur de bande - Google Patents

Systeme et procede de gestion de temps et de largeur de bande Download PDF

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Publication number
WO2000049747A1
WO2000049747A1 PCT/US2000/001496 US0001496W WO0049747A1 WO 2000049747 A1 WO2000049747 A1 WO 2000049747A1 US 0001496 W US0001496 W US 0001496W WO 0049747 A1 WO0049747 A1 WO 0049747A1
Authority
WO
WIPO (PCT)
Prior art keywords
channels
data transmission
physical data
virtual
transmission channels
Prior art date
Application number
PCT/US2000/001496
Other languages
English (en)
Inventor
Keith R. Barker
Mark T. Rafter
Original Assignee
Cyberstar, L.P.
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 Cyberstar, L.P. filed Critical Cyberstar, L.P.
Priority to AU28549/00A priority Critical patent/AU2854900A/en
Publication of WO2000049747A1 publication Critical patent/WO2000049747A1/fr

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Classifications

    • 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
    • H04L12/1886—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains

Definitions

  • the present invention relates generally to data distribution systems and methods, and more particularly, to a broadcast time and bandwidth management system and method that manages the duration and bandwidth of virtual broadcast channels created for use in a data distribution.
  • the assignee of the present invention has developed a data distribution system, and in particular, a satellite-based data distribution system, that that is used to distribute data supplied by content providers to personal computers of clients. It would be desirable to provide the most efficient use of the broadcast resources of the data distribution system to optimize transfer of data between content providers and client personal computers using the data distribution system. Consequently, an important aspect of the system was developed that addresses this need that manages the time and bandwidth aspects of the data distribution system.
  • the present invention provides for an improved broadcast time and bandwidth management systems and methods.
  • the broadcast time and bandwidth management systems and methods manage the duration and bandwidth of virtual broadcast channels used in a data distribution system.
  • the broadcast time and bandwidth management system comprises one or more physical data transmission channels that each carry one or more time division multiplexed channels. Means are provided for controlling the data distribution system to provide one or more virtual channels within each time division multiplexed channel.
  • a software algorithm is used to manage the virtual channels within the one or more physical data transmission channels. The software algorithm defines a virtual channel identifier for each of the virtual channels, defines and/or modifies a data rate for each of the virtual channels, and defines and/or modifies the duration of each of the virtual channels.
  • the one or more physical data transmission channels may comprise physical data transmission channels that are transmitted over a variety of links.
  • Such links include wire transmission links, wireless RF transmission links coaxial cable transmission links, optical fiber transmission links, and laser transmission links.
  • the broadcast time and bandwidth management method comprises the following steps.
  • Each of the one or more physical data transmission channels are caused to carry one or more time division multiplexed channels.
  • the data distribution system is controlled to provide one or more virtual channels within each time division multiplexed channel.
  • the virtual channels are controlled within the one or more physical data transmission channels by defining a virtual channel identifier for each of the virtual channels, defining and/or modifying a data rate for each of the virtual channels, and defining and/or modifying the duration of each of the virtual channels.
  • Fig. 1 illustrates an exemplary data distribution system in which the present invention may be employed
  • FIG. 2 illustrates details of a reduced to practice data distribution system in which the present invention may be employed
  • FIG. 3 illustrates data channels employed in the present invention
  • Fig. 4 illustrates virtual channels employed in a broadcast time and bandwidth management system and method in accordance with the principles of the present invention
  • Fig. 5 illustrates data broadcasting using the broadcast time and bandwidth management systems and methods of the present invention
  • Fig. 6 illustrates an exemplary broadcast time and bandwidth management system in accordance with the principles of the present invention
  • Fig. 7 illustrates an exemplary broadcast time and bandwidth management method in accordance with the principles of the present invention.
  • Fig. 1 illustrates an exemplary data distribution system 10 in which the present invention may be employed.
  • the exemplary data distribution system 10 comprises a broadcast system 20, a multichannel physical transmission system 30 and a receiving system 40.
  • the broadcast system 20 comprises a system that is used to gather and configure data (content) for distribution.
  • the broadcast system 20 broadcasts or transmits the data (content) by way of the multichannel physical transmission system 30 to the receiving system 40.
  • the receiving system 40 processes the received data (content) to store or display the data (content) to a user.
  • Fig. 2 illustrates details of an exemplary reduced to practice data distribution system 10, illustrated as a satellite broadcast data distribution system 10, in which broadcast time and bandwidth management systems and methods in accordance with the principles of the present invention may be employed.
  • the exemplary data distribution system 10 is designed to distribute data (content) derived from one or more content providers 1 1 by way of a satellite 14 to client personal computers 16.
  • the system 10 uses Internet protocol (IP) addressing to distribute the data to the personal computers 16.
  • IP Internet protocol
  • the system 10 comprises a network operations center 13 that includes a data broadcast subsystem (DBS) 21, a subscriber management subsystem (SMS) 22. a network management subsystem (NMS) 23, and a content management subsystem (CMS) 24.
  • DBS data broadcast subsystem
  • SMS subscriber management subsystem
  • NMS network management subsystem
  • CMS content management subsystem
  • One or more content providers 1 1 communicate by way of a router or the Internet 12, for example, to the network operations center 13.
  • the network operations center 13 communicates by way of the satellite 14 to the client personal computers 16
  • the client personal computers 16 interface to the satellite 14 using satellite receiver PC cards (not shown) disposed in the client personal computers 16.
  • the client personal computers 16 are connected to a local area network 17 and interface to the satellite 14 using a PC card disposed in a server computer 15 coupled to the local area network.
  • the client personal computers 16 are also coupled by way of a modem 18 to the network operations center 13.
  • the modem 18 provides a low-rate return path that is used to transmit requests from the client personal computers 16 to the network operations center 13 in order to download data derived from the content providers 11.
  • the broadcast system 20 includes the content provider 11, the Internet 12 and the network operations center 13 shown in Fig. 2.
  • the multichannel physical transmission system 30 includes the satellite 14, along with the transmission components of the network operations center 13 and the receiver cards in the server computer 15 or client personal computers 16.
  • the receiving system 40 includes the client personal computers 16, the local area network 17, and the server computer 15 shown in Fig. 2.
  • Each of the client personal computers 16 includes software that interfaces to the network operations center 13 and the content providers 11.
  • the software is used to browse the Internet 12, send requests for data, control data download sessions, schedule delivery of data, and download streaming audio, video and data to the client personal computers 16in real time, for example.
  • the system 10 and the software cooperate to establish a virtual private multicast network between the content providers 11 and the client personal computers 16.
  • the system 10 and the software cooperate to provide managed electronic data delivery to multiple client personal computers 16.
  • the system 10 and the software cooperate to provide both video and data download services with high efficiency.
  • FIG. 3 illustrates data channels employed in the broadcast time and bandwidth management system and method in accordance with the present invention.
  • Fig. 3 illustrates a graph showing a plurality of physical channels ( 1. 2, ..., N-l, N) employed in the system 10 that are distributed over frequency.
  • Each of the physical channels contain one or more time division multiplexed channels, or data (bit) streams ( 1. 2, .... M).
  • the present invention improves upon the transmission capabilities of these available time division multiplexed channels by employing multiple virtual channels, or bit streams as is illustrated in Fig. 4.
  • Fig. 4 it illustrates the virtual channels employed in the broadcast time and bandwidth management system and method of the present invention.
  • Each of the time division multiplexed bit streams contain a plurality of bits (A, B. C) transmitted over time.
  • Each of the respective bits (A. B. and C) are transmitted on a separate virtual channel, identified as virtual bit stream (VBS) A, VBS B, and NBS C.
  • Fig. 5 illustrates a data broadcasting methodology using the broadcast time and bandwidth management systems and methods of the present invention.
  • Fig. 5 shows a chart illustratin g time versus bandwidth or data rate.
  • the broadcast time and bandwidth management systems and methods provide for management of the bandwidth, sessions. Time of delivery, and rate of delivery of data (content) from the service providers 11 to the client personal computers 16 as is shown and described with reference to Fig. 2.
  • Each of the various conditional access service sessions contain one or more Internet Protocol (IP) sessions that may have the same or different bandwidths or data rates, and occur for differing lengths of time.
  • IP Internet Protocol
  • each of the IP sessions provides for a process that transports data (content) from the service provider 11 to the client personal computers 16.
  • the transportation process is a follows.
  • the IP session generates one or more digital video broadcast (DNB) data sections which are scrambled and are each assigned one of a plurality of digital video broadcast packet identifiers (DNB PIDs).
  • DNS digital video broadcast
  • the scrambled data sections containing the DNB packet identifiers are transmitted over the multichannel physical transmission system 30 as is shown in Fig. 1, or such as by way of the satellite 14 shown in Fig. 2, for example, to the receiving system 40, such as the client personal computers 16.
  • Fig. 6 it illustrates an exemplary broadcast time and bandwidth management system 50 in accordance with the principles of the present invention that may be used with a data distribution system 10.
  • the exemplary broadcast time and bandwidth management system 50 comprises one or more physical data transmission channels 51 that each carry one or more time division multiplexed channels 52 (or bit streams 52).
  • Apparatus 53 is provided for controlling the data distribution system 10 to provide one or more virtual channels 54 within each time division multiplexed channel 52.
  • Such apparatus 53 may implement a methodology for assigning conditional access service indexed encryption codes to specific users, which are used to provide one or more virtual channels 54 within each time division multiplexed channel 52.
  • a software algorithm 55 is used to manage the virtual channels 54 within the one or more physical data transmission channels 51.
  • the software algorithm 55 defines a virtual channel identifier (PID) for each of the virtual channels 54, defines and/or modifies a data rate for each of the virtual channels 54, and defines and/or modifies the time duration of each of the virtual channels 54 in the manner discussed with reference to Fig. 5.
  • PID virtual channel identifier
  • the physical data transmission channels 51 may be transmitted over a variety of physical links other than the satellite link discussed with reference to Fig. 2. Such other links include wire transmission links, wireless RF transmission links coaxial cable transmission links, optical fiber transmission links, and laser transmission links.
  • Fig. 7 illustrates an exemplary broadcast time and bandwidth management method 60 in accordance with the principles of the present invention that may be used with a data distribution system 10.
  • the exemplary broadcast time and bandwidth management method 60 comprises the following steps.
  • Each of the one or more physical data transmission channels are caused 61 to carry one or more time division multiplexed channels.
  • the data distribution system is controlled 62 to provide one or more virtual channels within each time division multiplexed channel.
  • the virtual channels are controlled 63 within the one or more physical data transmission channels by defining a virtual channel identifier for each of the virtual channels, defining and/or modifying a data rate for each of the virtual channels, and defining and/or modifying the duration of each of the virtual channels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

Cette invention se rapporte à des systèmes (50) et des procédés (60) de gestion de temps et de largeur de bandes de télédiffusion, qui permettent de gérer la durée et la largeur de bande de canaux de télédiffusion virtuels (54) utilisés dans un système de distribution de données. Ce système comprend un ou plusieurs canaux de transmission de données physiques (51) qui portent chacun un ou plusieurs canaux à multiplexage temporel (52). Un ou plusieurs canaux virtuels (54) sont prévus à l'intérieur de chaque canal à multiplexage temporel (52). Un algorithme logiciel (55) est utilisé pour gérer les canaux virtuels (54) à l'intérieur des canaux de transmission de données physiques (51). Cet algorithme logiciel (55) définit un identificateur de canal virtuel (A-C) pour chacun des canaux virtuels (54), définit et/ou modifie un débit de données pour chacun des canaux virtuels (54), et définit et/ou modifie la durée de chacun des canaux virtuels (54).
PCT/US2000/001496 1999-02-16 2000-01-20 Systeme et procede de gestion de temps et de largeur de bande WO2000049747A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU28549/00A AU2854900A (en) 1999-02-16 2000-01-20 Time and bandwidth management system and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24989299A 1999-02-16 1999-02-16
US09/249,892 1999-02-16

Publications (1)

Publication Number Publication Date
WO2000049747A1 true WO2000049747A1 (fr) 2000-08-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/001496 WO2000049747A1 (fr) 1999-02-16 2000-01-20 Systeme et procede de gestion de temps et de largeur de bande

Country Status (2)

Country Link
AU (1) AU2854900A (fr)
WO (1) WO2000049747A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5751709A (en) * 1995-12-28 1998-05-12 Lucent Technologies Inc. Adaptive time slot scheduling apparatus and method for end-points in an ATM network
US5831976A (en) * 1996-05-03 1998-11-03 Motorola, Inc. Method and apparatus for time sharing a radio communication channel
US6005851A (en) * 1997-10-10 1999-12-21 Nortel Networks Corporation Adaptive channel control for data service delivery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5751709A (en) * 1995-12-28 1998-05-12 Lucent Technologies Inc. Adaptive time slot scheduling apparatus and method for end-points in an ATM network
US5831976A (en) * 1996-05-03 1998-11-03 Motorola, Inc. Method and apparatus for time sharing a radio communication channel
US6005851A (en) * 1997-10-10 1999-12-21 Nortel Networks Corporation Adaptive channel control for data service delivery

Also Published As

Publication number Publication date
AU2854900A (en) 2000-09-04

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