TW288235B - 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
TW288235B
TW288235B TW085102411A TW85102411A TW288235B TW 288235 B TW288235 B TW 288235B TW 085102411 A TW085102411 A TW 085102411A TW 85102411 A TW85102411 A TW 85102411A TW 288235 B TW288235 B TW 288235B
Authority
TW
Taiwan
Prior art keywords
stations
receiving stations
control field
synchronization
robust
Prior art date
Application number
TW085102411A
Other languages
Chinese (zh)
Inventor
De Lange Martin
Gfeller Fritz
Hirt Walter
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
Application granted granted Critical
Publication of TW288235B publication Critical patent/TW288235B/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

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 the 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.
TW085102411A 1996-01-03 1996-02-29 Robust method and apparatus enabling multi-mode wireless optical communication TW288235B (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
TW288235B true TW288235B (en) 1996-10-11

Family

ID=47227345

Family Applications (1)

Application Number Title Priority Date Filing Date
TW085102411A TW288235B (en) 1996-01-03 1996-02-29 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7804482B2 (en) 2008-03-26 2010-09-28 Au Optronics Corporation 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
EP0759055B1 (en) * 1994-04-18 1998-07-22 International Business Machines Corporation Wireless optical communication system with adaptive data rate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7804482B2 (en) 2008-03-26 2010-09-28 Au Optronics Corporation LCD and backlight module thereof

Also Published As

Publication number Publication date
KR100305494B1 (en) 2001-11-02
MY120295A (en) 2005-10-31
KR19990072166A (en) 1999-09-27

Similar Documents

Publication Publication Date Title
CA2241937A1 (en) Robust method and apparatus enabling multi-mode wireless optical communication
DK0880868T3 (en) Method and apparatus for compressing and transmitting high-speed data
AU2001249821A1 (en) A transceiver method and signal therefor embodied in a carrier wave for a frame-based communications network
TW266364B (en)
EP1223780A3 (en) Method and apparatus for providing high speed data communication in a cellular environment
WO1995027345A1 (en) Air interface adapting method for a mobile radio system
BR9505639A (en) Radio access process radio transmitter / receiver radio base station communication process to provide telephone communications and communication system
MY113292A (en) Layer 2 protocol in a cellular communication system
GB2351884B (en) Data transmission method
NO960118D0 (en) Control of transmission and control of transmit power for mobile station in a mobile telecommunication system
NO20070587L (en) Link quality feedback in a wireless communication system.
BR0015437A (en) Method for monitoring transmission quality
AU2506000A (en) Method and apparatus for variable and fixed forward link rate control in a mobile radio communication system
TW357505B (en) Method and apparatus for bandwidth reuse in a communication network
CA2243678A1 (en) Process for transmitting data, in particular gsm data
DE69841338D1 (en)
AU5061993A (en) Adjusting speech frames in radio communication system
EP0986214A3 (en) Communication control method and transmission apparatus
EP0788254A3 (en) Data structure, data communication method, apparatus and communication terminal apparatus
AU8766598A (en) Data communication method and apparatus for increasing throughput based on quality of communications channel
GB9621332D0 (en) An adaptive communications system
CA2306128A1 (en) Method and system for transmitting a data communication from a calling communication unit
TW288235B (en) Robust method and apparatus enabling multi-mode wireless optical communication
MX9605956A (en) Method and apparatus for hopping digital packet data signals.

Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees