WO2002061977A3 - Repetition coding for optical networks of computing devices - Google Patents

Repetition coding for optical networks of computing devices Download PDF

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Publication number
WO2002061977A3
WO2002061977A3 PCT/GB2002/000425 GB0200425W WO02061977A3 WO 2002061977 A3 WO2002061977 A3 WO 2002061977A3 GB 0200425 W GB0200425 W GB 0200425W WO 02061977 A3 WO02061977 A3 WO 02061977A3
Authority
WO
WIPO (PCT)
Prior art keywords
pulses
communication
information
irda
single bit
Prior art date
Application number
PCT/GB2002/000425
Other languages
French (fr)
Other versions
WO2002061977A2 (en
Inventor
Thomas Zimmerman
Original Assignee
Ibm
Ibm Uk
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 Ibm, Ibm Uk filed Critical Ibm
Priority to KR10-2003-7009877A priority Critical patent/KR20030074744A/en
Priority to AU2002229897A priority patent/AU2002229897A1/en
Publication of WO2002061977A2 publication Critical patent/WO2002061977A2/en
Publication of WO2002061977A3 publication Critical patent/WO2002061977A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/1149—Arrangements for indoor wireless networking of information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system

Abstract

This invention extends the range of optical data communication systems by trading speed for distance, integrating a plurality of pulses over time to define a single bit of information, to increase current IRDA ranges from 1 m to 10 meters. This enables much more interactivity between an individual and a point of sale, and reduces the amount of wiring required for communication since RF transmission requires less wiring than an ac modem. The extended range of optical data communication is enabled through the use of intermediary relay stations. IRDA communication, as is well known, uses very short duration optical pulses to send data up to 1 Mbit/sec; this has the concomitant effect of minimizing LED duty cycle and preventing excessive heating. This invention uses a number of integrated pulses to represent a single bit instead of utilizing a one to one correspondence between pulses and bits. To accomplish this, processing software causes the transmitter to 'stutter' or repetitively emanate the identical pulse representing a bit of information. Sufficient photons are thereby gathered at a receiver to reach a predetermined threshold.
PCT/GB2002/000425 2001-02-01 2002-01-31 Repetition coding for optical networks of computing devices WO2002061977A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR10-2003-7009877A KR20030074744A (en) 2001-02-01 2002-01-31 System and method for remote optical digital networking of computing devices
AU2002229897A AU2002229897A1 (en) 2001-02-01 2002-01-31 Repetition coding for optical networks of computing devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/775,374 2001-02-01
US09/775,374 US6920289B2 (en) 2001-02-01 2001-02-01 System and method for remote optical digital networking of computing devices

Publications (2)

Publication Number Publication Date
WO2002061977A2 WO2002061977A2 (en) 2002-08-08
WO2002061977A3 true WO2002061977A3 (en) 2003-02-06

Family

ID=25104199

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/000425 WO2002061977A2 (en) 2001-02-01 2002-01-31 Repetition coding for optical networks of computing devices

Country Status (4)

Country Link
US (2) US6920289B2 (en)
KR (1) KR20030074744A (en)
AU (1) AU2002229897A1 (en)
WO (1) WO2002061977A2 (en)

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