CA2235585A1 - Detection amelioree de transmissions de donnees multiples - Google Patents

Detection amelioree de transmissions de donnees multiples Download PDF

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Publication number
CA2235585A1
CA2235585A1 CA 2235585 CA2235585A CA2235585A1 CA 2235585 A1 CA2235585 A1 CA 2235585A1 CA 2235585 CA2235585 CA 2235585 CA 2235585 A CA2235585 A CA 2235585A CA 2235585 A1 CA2235585 A1 CA 2235585A1
Authority
CA
Canada
Prior art keywords
transmitter
pseudo
intervals
random
local timing
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.)
Abandoned
Application number
CA 2235585
Other languages
English (en)
Inventor
Hendrik Lodewyk Van Eeden
Jacob Pieter Laurens Cloete
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.)
BTG International Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2235585A1 publication Critical patent/CA2235585A1/fr
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
    • G06K7/10029—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the time domain, e.g. using binary tree search or RFID responses allocated to a random time slot
    • G06K7/10059—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the time domain, e.g. using binary tree search or RFID responses allocated to a random time slot transponder driven
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

La présente invention se rapporte à un procédé et à un appareil permettant d'améliorer la probabilité d'identification d'un certain nombre d'émetteurs (1), généralement des transpondeurs, qui transmettent tous des données à un récepteur. L'invention peut s'appliquer à un certain nombre de systèmes tels que des systèmes passifs de transpondeurs radio, des systèmes dans lesquels un certain nombre d'émetteurs automatiques doivent être identifiés par un récepteur, ou des systèmes dans lesquels un certain nombre d'émetteurs émettent en utilisant un algorithme de retard aléatoire de type " extrémité d'adossement et reprise". Chaque émetteur (1) est conçu pour émettre à intervalles et comprend un dispositif générant des transmissions, un dispositif calculant la durée des intervalles entre les transmissions successives et un dispositif (20) validant l'émetteur à des intervalles aléatoires et pseudo-aléatoires par rapport à une fréquence de fonctionnement du moyen de synchronisation locale (21). Dans des systèmes à identification radio passive, la fréquence du moyen de synchronisation locale est indéterminée, restant non précisée jusqu'à ce que l'émetteur entre en fonctionnement.
CA 2235585 1995-11-09 1996-11-08 Detection amelioree de transmissions de donnees multiples Abandoned CA2235585A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA95/9519 1995-11-09
ZA959519 1995-11-09
PCT/GB1996/002742 WO1997017667A1 (fr) 1995-11-09 1996-11-08 Detection amelioree de transmissions de donnees multiples

Publications (1)

Publication Number Publication Date
CA2235585A1 true CA2235585A1 (fr) 1997-05-15

Family

ID=25585411

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2235585 Abandoned CA2235585A1 (fr) 1995-11-09 1996-11-08 Detection amelioree de transmissions de donnees multiples

Country Status (11)

Country Link
EP (1) EP0859989A1 (fr)
JP (1) JP2000500932A (fr)
KR (1) KR19990067371A (fr)
CN (1) CN1201540A (fr)
AR (1) AR002220A1 (fr)
AU (1) AU7502396A (fr)
BR (1) BR9611705A (fr)
CA (1) CA2235585A1 (fr)
MX (1) MX9803671A (fr)
TW (1) TW383527B (fr)
WO (1) WO1997017667A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2333623B (en) * 1998-01-24 2000-04-26 Plessey Telecomm Transaction system
GB2335573B (en) 1998-03-18 2000-03-15 Univ Singapore An RF transponder identification system and protocol
GB2344257A (en) 1998-11-26 2000-05-31 Innovision Research And Techno Data communication apparatus and board game
JP3001570B1 (ja) 1999-02-22 2000-01-24 埼玉日本電気株式会社 適応アンテナ指向性制御方法及びそのシステム
EP1192730A4 (fr) * 1999-05-21 2007-09-05 Ralph J Koerner Systeme d'identification pour surveiller la presence/l'absence des elements d'un ensemble defini
AU2001264504A1 (en) * 2000-06-12 2001-12-24 Telefonaktiebolaget Lm Ericsson (Publ) Random identity management in scatternets
KR100486754B1 (ko) * 2000-08-31 2005-05-03 매그나칩 반도체 유한회사 데이터 충돌을 방지한 무선주파수 식별 태그 시스템 및데이터 충돌 방지 방법
FR2833724A1 (fr) * 2001-12-13 2003-06-20 Canal Plus Technologies Composant electronique numerique protege contre des analyses de type electrique et/ou electromagnetique, notamment dans le domaine de la carte a puce
GB0213724D0 (en) * 2002-06-14 2002-07-24 Turner Christopher G G Electronic identification system
WO2006079972A1 (fr) * 2005-01-31 2006-08-03 Nxp B.V. Communication amelioree entre une station de communication et des porteuses de donnees
KR100749818B1 (ko) * 2005-09-23 2007-08-17 한국전자통신연구원 Ｒｆｉｄ 시스템에 있어서의 멀티 태그 인식 장치 및 그방법
US20070126556A1 (en) * 2005-12-07 2007-06-07 Kovio, Inc. Printed radio frequency identification (RFID) tag using tags-talk-first (TTF) protocol
EP1956513B1 (fr) 2007-02-07 2010-06-02 Albis Technologies AG Protocole de transmission ouvrant une fenêtre dynamique pour recevoir des données
CN101604021B (zh) * 2009-07-09 2012-05-09 复旦大学 一种无线射频识别系统的定位方法与装置
KR20120011602A (ko) * 2010-07-29 2012-02-08 삼성테크윈 주식회사 알에프아이디(ｒｆｉｄ) 리더의 통신 제어 방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471345A (en) * 1982-03-05 1984-09-11 Sensormatic Electronics Corporation Randomized tag to portal communication system
FR2667715A1 (fr) * 1990-10-09 1992-04-10 Gemplus Card Int Procede et dispositif pour accroitre la protection d'une carte a memoire.
US5530702A (en) * 1994-05-31 1996-06-25 Ludwig Kipp System for storage and communication of information

Also Published As

Publication number Publication date
TW383527B (en) 2000-03-01
KR19990067371A (ko) 1999-08-16
EP0859989A1 (fr) 1998-08-26
AU7502396A (en) 1997-05-29
MX9803671A (es) 1998-09-30
BR9611705A (pt) 1999-02-23
WO1997017667A1 (fr) 1997-05-15
JP2000500932A (ja) 2000-01-25
AR002220A1 (es) 1998-03-11
CN1201540A (zh) 1998-12-09

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Legal Events

Date Code Title Description
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