MY120295A - Robust method and apparatus enabling multi-mode wireless optical communication. - Google Patents

Robust method and apparatus enabling multi-mode wireless optical communication.

Info

Publication number
MY120295A
MY120295A MYPI96005415A MYPI9605415A MY120295A MY 120295 A MY120295 A MY 120295A MY PI96005415 A MYPI96005415 A MY PI96005415A MY PI9605415 A MYPI9605415 A MY PI9605415A MY 120295 A MY120295 A MY 120295A
Authority
MY
Malaysia
Prior art keywords
stations
receiving stations
control field
synchronization
robust
Prior art date
Application number
MYPI96005415A
Inventor
Martin De Lange
Fritz Rudolf Gfeller
Walter Hirt
Original Assignee
Ibm
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
Priority claimed from PCT/IB1996/000002 external-priority patent/WO1997025788A1/en
Application filed by Ibm filed Critical Ibm
Publication of MY120295A publication Critical patent/MY120295A/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
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals

Abstract

DISCLOSED IS AN OPTICAL COMMUNICATION SYSTEM ENABLING COMMUNICATION BETWEEN SEVERAL CO-EXISTING TRANSMITTING AND RECEIVING STATIONS. IN ORDER TO ALLOW COMMUNICATION BETWEEN THE CO-EXISTING STATIONS, A ROBUST PHYSICAL LAYER HEADER (RPLH; 50) IS EMPLOYED WHICH CAN BE UNDERSTOOD BY ALL PARTICIPATING STATIONS. THIS ROBUST HEADER (50) AT LEAST COMPRISES A PREAMBLE (52) CONSISTING OF FRAMES FORMING A PERIODIC SEQUENCE OF PULSES, THE NUMBER OF SLOTS PER FRAME AND THE FRAME CONTENT BEING KNOWN TO ALL PARTICIPATING STATIONS. THE PREAMBLE (52) SERVES FOR RELATIVE SYNCHRONIZATION AND CARRIER DETECTION OF THE RECEIVING STATIONS. THE ROBUST HEADER (50) FURTHER COMPRISES A UNIQUE SYNCHRONIZATION WORD (53) USED FOR ABSOLUTE SYNCHRONIZATION OF THE RECEIVING STATIONS. THIS SYNCHRONIZATION WORD (53) IS FOLLOWED BY A CONTROL FIELD (59) OF FIXED LENGTH AND KNOWN STRUCTURE. BY MEANS OF THIS CONTROL FIELD (59) THE RECEIVING STATIONS ARE INFORMED WHICH MODULATION METHOD WILL BE USED FOR THE TRANSMISSION OF DATA. UNDER CERTAIN CIRCUMSTANCES IT IS ALSO USEFUL TO PROVIDE OTHER CONTROL INFORMATION IN SAID CONTROL FIELD (59) FOR COMMUNICATION LINK AND NETWORK CONTROL. FURTHERMORE, INFORMATION MAY BE EXCHANGED TO ALLOW NEGOTIATION AND/OR ADAPTATION OF THE DATA RATE USED FOR TRANSMISSION. THIS ALLOWS TO OPTIMIZE THE THROUGHPUT DEPENDING ON THE CONDITIONS (QUALITY) ON THE CHANNEL.
MYPI96005415A 1996-01-03 1996-12-20 Robust method and apparatus enabling multi-mode wireless optical communication. MY120295A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB1996/000002 WO1997025788A1 (en) 1996-01-03 1996-01-03 Robust method and apparatus enabling multi-mode wireless optical communication

Publications (1)

Publication Number Publication Date
MY120295A true MY120295A (en) 2005-10-31

Family

ID=47227345

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI96005415A MY120295A (en) 1996-01-03 1996-12-20 Robust method and apparatus enabling multi-mode wireless optical communication.

Country Status (3)

Country Link
KR (1) KR100305494B1 (en)
MY (1) MY120295A (en)
TW (1) TW288235B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI394130B (en) 2008-03-26 2013-04-21 Au Optronics Corp Lcd and backlight module thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5099346A (en) * 1988-01-27 1992-03-24 Spectrix Corporation Infrared communications network
US5808760A (en) * 1994-04-18 1998-09-15 International Business Machines Corporation Wireless optical communication system with adaptive data rates and/or adaptive levels of optical power

Also Published As

Publication number Publication date
KR19990072166A (en) 1999-09-27
KR100305494B1 (en) 2001-11-02
TW288235B (en) 1996-10-11

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