WO2001028147A3 - Method and apparatus for upstream burst transmission synchronization in cable modems - Google Patents

Method and apparatus for upstream burst transmission synchronization in cable modems Download PDF

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Publication number
WO2001028147A3
WO2001028147A3 PCT/US2000/028010 US0028010W WO0128147A3 WO 2001028147 A3 WO2001028147 A3 WO 2001028147A3 US 0028010 W US0028010 W US 0028010W WO 0128147 A3 WO0128147 A3 WO 0128147A3
Authority
WO
WIPO (PCT)
Prior art keywords
time
burst transmission
head end
upstream burst
cable
Prior art date
Application number
PCT/US2000/028010
Other languages
French (fr)
Other versions
WO2001028147A2 (en
Inventor
Brett Alan Bernath
John Milford Brooks
Manoj Mehta
Yoav Pesach Goldenberg
Original Assignee
Conexant Systems Inc
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 Conexant Systems Inc filed Critical Conexant Systems Inc
Priority to DE60025242T priority Critical patent/DE60025242T2/en
Priority to AT00972062T priority patent/ATE314760T1/en
Priority to EP00972062A priority patent/EP1222759B1/en
Publication of WO2001028147A2 publication Critical patent/WO2001028147A2/en
Publication of WO2001028147A3 publication Critical patent/WO2001028147A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/85—Assembly of content; Generation of multimedia applications
    • H04N21/854—Content authoring
    • H04N21/8547—Content authoring involving timestamps for synchronizing content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting

Abstract

A system for synchronizing the upstream burst transmission in a cable system to a time specified by the cable head end is disclosed. The system includes a free running counter within a cable modem (CM) or network interface unit (NIU), along with logic to capture the value of this free running counter at the time a frame of MPEG-2 SYNC data arrives, to create a time tag stored in memory. A computer within the cable modem or network interface unit has access to the time tags in memory and the contents of a time synchronization message from the head end, also stored in memory. The computer contains a program to calculate the value of the local counter that corresponds to a time to transmit commanded by the cable system head end. The system includes logic within the CM or NIU to initiate an upstream burst transmission when the value of the local counter becomes equal to a calculated value, thus causing the cable modem to initiate its upstream burst transmission precisely at the time commanded by the head end.
PCT/US2000/028010 1999-10-09 2000-10-09 Method and apparatus for upstream burst transmission synchronization in cable modems WO2001028147A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE60025242T DE60025242T2 (en) 1999-10-09 2000-10-09 METHOD AND DEVICE FOR SYNCHRONIZING UPWARD BURST TRANSMISSIONS IN CABLE MODEMS
AT00972062T ATE314760T1 (en) 1999-10-09 2000-10-09 METHOD AND DEVICE FOR SYNCHRONIZING UPWARD BURST TRANSMISSIONS IN CABLE MODEMS
EP00972062A EP1222759B1 (en) 1999-10-09 2000-10-09 Method and apparatus for upstream burst transmission synchronization in cable modems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/415,612 US6526070B1 (en) 1999-10-09 1999-10-09 Method and apparatus for upstream burst transmissions synchronization in cable modems
US09/415,612 1999-10-09

Publications (2)

Publication Number Publication Date
WO2001028147A2 WO2001028147A2 (en) 2001-04-19
WO2001028147A3 true WO2001028147A3 (en) 2001-08-30

Family

ID=23646420

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/028010 WO2001028147A2 (en) 1999-10-09 2000-10-09 Method and apparatus for upstream burst transmission synchronization in cable modems

Country Status (5)

Country Link
US (3) US6526070B1 (en)
EP (1) EP1222759B1 (en)
AT (1) ATE314760T1 (en)
DE (1) DE60025242T2 (en)
WO (1) WO2001028147A2 (en)

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Also Published As

Publication number Publication date
US6526070B1 (en) 2003-02-25
US20010043622A1 (en) 2001-11-22
ATE314760T1 (en) 2006-01-15
US6556591B2 (en) 2003-04-29
EP1222759A2 (en) 2002-07-17
US20010038647A1 (en) 2001-11-08
DE60025242T2 (en) 2006-09-14
US6553040B2 (en) 2003-04-22
WO2001028147A2 (en) 2001-04-19
DE60025242D1 (en) 2006-02-02
EP1222759B1 (en) 2005-12-28

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