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WO2000031902A1 - Systeme de transmission dote d'un transpondeur - Google Patents

Systeme de transmission dote d'un transpondeur Download PDF

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Publication number
WO2000031902A1
WO2000031902A1 PCT/EP1999/008535 EP9908535W WO0031902A1 WO 2000031902 A1 WO2000031902 A1 WO 2000031902A1 EP 9908535 W EP9908535 W EP 9908535W WO 0031902 A1 WO0031902 A1 WO 0031902A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmission
optical
transponder
optical transmission
wavelength
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP1999/008535
Other languages
German (de)
English (en)
Inventor
Hermann Danzer
Othmar Lasser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG Oesterreich
Original Assignee
Siemens AG Oesterreich
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 Siemens AG Oesterreich filed Critical Siemens AG Oesterreich
Publication of WO2000031902A1 publication Critical patent/WO2000031902A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04B10/114—Indoor or close-range type systems

Definitions

  • the invention relates to a transmission system with at least one optical transmission link in the free space, which comprises at least one transmitting and receiving element.
  • optical data transmission in free space was carried out exclusively in the wavelength range from 800 to 950 nm, preferably at around 880 nm, where e.g. those known as IrDA (Infrared Data Association)
  • Short distance connection typically 1 m and designed for direct view of the transmission partners. Because of the low
  • the IR transmission power which is required for effective transmission over a greater distance, poses a problem with regard to eye damage, since the permissible eye strain is relatively low in the wavelength range around 900 nm.
  • a data transmission protocol was developed to ensure that a room-filling transmission unit only begins to transmit when no IR signal is detected in the same room. This presupposes that the receiver assigned to the transmitter (a half-duplex method is available) can also receive all IR signals that may occur in the room. Otherwise, an IR link in operation will be overlooked and could be disturbed. An independent, mutually interference-free transmission of two or more IR links is therefore not guaranteed.
  • the invention is therefore based on the object of specifying a transmission system in which the problems mentioned do not occur.
  • this is done with a transmission system of the type mentioned at the outset, in which an optical transponder is inserted in at least one optical transmission link in front of the transmitting element and in front of the receiving element in such a way that a first optical transmission link is included between the transponder and the transmitting or receiving element a first transmission wavelength and a second optical transmission link with a second transmission wavelength is implemented between the transponders.
  • An embodiment of the invention is advantageous in that the first optical transmission links are designed as short-link connections and the second optical transmission links are designed as space-filling connections. It is also expedient if at least one free-space laser with or without a diffuser or at least one spontaneously emitting diode is used as the transmission elements for the second optical transmission paths and if one or more semiconductor diodes made of a binary, ternary or quaternary are used as reception elements for the second optical transmission paths Compound or made of germanium and if a semiconductor filter is attached in front of these receiving elements, which absorbs light with a wavelength less than 1200 nm.
  • FIG. 1 The figure shows two optical transponders T1, T2 which extend a conventional short-range transmission device K1, K2 with a wavelength of 880 nm to a space-filling transmission device:
  • the transponders T1, T2 each comprise two units: a first component A, A * with a first receiver device both for receiving the optical signals emitted by the short-distance device with a wavelength of 880 nm and with a first transmitter device for transmitting optical signals the wavelength of 880 nm detectable by the short-distance device.
  • the first receiver device comprises at least one silicon receiver diode. Dl ,. Dl * with daylight filter and a reception range with a wavelength of 800 to 1100 nm, while the first transmission device has one or more free space laser diodes D2, D2 * with or without a diffuser or one or more spontaneously emitting diodes for the range around 880 nm.
  • a second component B, B * contains the transponder; e a transmitting and receiving device for space-filling
  • the signals of the short-range connection received by the first component A or A * are passed on electrically converted to the respective transmitting part of the second component B or B *. This transmitter emits them
  • Format filling space preferably by means of laser diodes D3, D3 * with or without diffuser.
  • the second component B of the first transponder T1 sends, the second component B * of the second transponder T2, equipped with at least one receiving diode D4 * for the long-wave range greater than 1200 nm, receives the signals, converts them into electrical signals, which in turn transmit the transmitter the first component A * of the second transponder with the standard wavelength of eg Activate 880 nm.
  • the transmission format here is such that the receiver of the short-range connection can receive the signals.
  • the second component B * of the second transponder transmits via one or more transmission diodes D3 *, the signals of which are received by the first transponder Kl by means of one or more reception diodes D4.
  • the use of a transparent transmission protocol by the transponders is particularly advantageous in the case of changing data rates, since this automatically adjusts to the current data rate.
  • filters F and F * are connected upstream of the receiving diodes, which absorb the radiation of the standard wavelength, eg filters made of silicon. So the second components B resp. B * selective receiver for wavelengths greater than 12 00 nm.
  • Transponder pair can be set to get a further increase in range on a further wavelength or to avoid mutual interference.

Landscapes

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

Abstract

Système de transmission doté d'au moins un parcours de transmission optique aérien, qui comporte au moins un élément émetteur et un élément récepteur (K1, K2). Ledit système est caractérisé en ce que dans au moins un parcours de transmission optique avant l'élément émetteur et avant l'élément récepteur, un transpondeur optique (T1, T2) est placé de telle sorte qu'un premier parcours de transmission optique avec une première longueur d'ondes de transmission est réalisé entre un transpondeur et l'élément émetteur ou récepteur, et qu'un second parcours de transmission optique avec une seconde longueur d'ondes de transmission est réalisé entre les transpondeurs.
PCT/EP1999/008535 1998-11-19 1999-11-08 Systeme de transmission dote d'un transpondeur Ceased WO2000031902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1928/98 1998-11-19
AT192898A AT407934B (de) 1998-11-19 1998-11-19 Übertragungssystem mit transponder

Publications (1)

Publication Number Publication Date
WO2000031902A1 true WO2000031902A1 (fr) 2000-06-02

Family

ID=3524054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/008535 Ceased WO2000031902A1 (fr) 1998-11-19 1999-11-08 Systeme de transmission dote d'un transpondeur

Country Status (2)

Country Link
AT (1) AT407934B (fr)
WO (1) WO2000031902A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032981A1 (fr) * 1980-01-12 1981-08-05 ANT Nachrichtentechnik GmbH Système d'appel au secours domestique avec déclenchement à distance
DE3244712A1 (de) * 1982-12-03 1984-06-14 Standard Elektrik Lorenz Ag, 7000 Stuttgart Geraeteanordnung der unterhaltungs- und/oder gebaeudeelektronik mit einem drahtlosen uebertragungsweg zwischen einem gebergeraet und einem empfaengergeraet
US4809257A (en) * 1985-04-02 1989-02-28 International Business Machines Corporation Hierarchical distributed infrared communication system
US5818619A (en) * 1995-06-15 1998-10-06 Jolt Ltd. Wireless communication system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2848981B2 (ja) * 1991-03-27 1999-01-20 日本ビクター株式会社 中継装置及び中継システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032981A1 (fr) * 1980-01-12 1981-08-05 ANT Nachrichtentechnik GmbH Système d'appel au secours domestique avec déclenchement à distance
DE3244712A1 (de) * 1982-12-03 1984-06-14 Standard Elektrik Lorenz Ag, 7000 Stuttgart Geraeteanordnung der unterhaltungs- und/oder gebaeudeelektronik mit einem drahtlosen uebertragungsweg zwischen einem gebergeraet und einem empfaengergeraet
US4809257A (en) * 1985-04-02 1989-02-28 International Business Machines Corporation Hierarchical distributed infrared communication system
US5818619A (en) * 1995-06-15 1998-10-06 Jolt Ltd. Wireless communication system

Also Published As

Publication number Publication date
AT407934B (de) 2001-07-25
ATA192898A (de) 2000-11-15

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