CA2235585A1 - Enhanced detection of multiple data transmissions - Google Patents

Enhanced detection of multiple data transmissions Download PDF

Info

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)
French (fr)
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/en
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)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Near-Field Transmission Systems (AREA)
  • Computer And Data Communications (AREA)
  • Small-Scale Networks (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
CA 2235585 1995-11-09 1996-11-08 Enhanced detection of multiple data transmissions Abandoned CA2235585A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA959519 1995-11-09
ZA95/9519 1995-11-09
PCT/GB1996/002742 WO1997017667A1 (en) 1995-11-09 1996-11-08 Enhanced detection of multiple data transmissions

Publications (1)

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

Family

ID=25585411

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2235585 Abandoned CA2235585A1 (en) 1995-11-09 1996-11-08 Enhanced detection of multiple data transmissions

Country Status (11)

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

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
US6611556B1 (en) * 1999-05-21 2003-08-26 Steve J. Koerner Identification system for monitoring the presence/absence of members of a defined set
WO2001097447A2 (en) * 2000-06-12 2001-12-20 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
US20100045434A1 (en) * 2005-01-31 2010-02-25 Nxp B.V. Communication between a communication station and data carriers
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
DE602007006902D1 (de) 2007-02-07 2010-07-15 Albis Technologies Ag Übertragungsprotokoll zur Öffnung eines dynamischen Fensters für Datenempfang
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
BR9611705A (pt) 1999-02-23
JP2000500932A (ja) 2000-01-25
AU7502396A (en) 1997-05-29
WO1997017667A1 (en) 1997-05-15
CN1201540A (zh) 1998-12-09
MX9803671A (es) 1998-09-30
KR19990067371A (ko) 1999-08-16
EP0859989A1 (en) 1998-08-26
TW383527B (en) 2000-03-01
AR002220A1 (es) 1998-03-11

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Legal Events

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