[go: up one dir, main page]

MX9803671A - Deteccion mejorada de transmisiones de datos multiples. - Google Patents

Deteccion mejorada de transmisiones de datos multiples.

Info

Publication number
MX9803671A
MX9803671A MX9803671A MX9803671A MX9803671A MX 9803671 A MX9803671 A MX 9803671A MX 9803671 A MX9803671 A MX 9803671A MX 9803671 A MX9803671 A MX 9803671A MX 9803671 A MX9803671 A MX 9803671A
Authority
MX
Mexico
Prior art keywords
systems
transmitter
transmitters
intervals
frequency
Prior art date
Application number
MX9803671A
Other languages
English (en)
Inventor
Hendrik Lodewyk Van Eeden
Jacob Pieter Laurens Cloete
Original Assignee
British Tech Group
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 British Tech Group filed Critical British Tech Group
Publication of MX9803671A publication Critical patent/MX9803671A/es

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)
  • Computer And Data Communications (AREA)
  • Small-Scale Networks (AREA)
  • Near-Field Transmission Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

La presente invencion proporciona un método y un aparato el cual perfecciona la probabilidad de identificacion de un numero de transmisores (1), típicamente transpondedores, los cuales están todos transmitiendo datos a un receptor. La invencion es aplicable a un numero de sistemas que incluyen los sistemas de transpondedores de radio frecuencia pasivos, sistemas en los cuales un numero de transmisores autoalimentados debe ser identificado por un receptor, o sistemas en los cuales un numero de transmisores radiodifunden usando un algoritmo de "regrese e intente de nuevo" retardo aleatoriamente. Cada transmisor (1), está adaptado para transmitir a intervalos y comprende un medio para generar las transmisiones, un medio para calcular la duracion de los intervalos entre las transmisiones sucesivas y un medio (20) para habilitar al transmisor a intervalos aleatorios o pseudoaleatorios relacionados a una frecuencia operativa de medios de regulacion de tiempo, locales (21). En los sistemas de RFID pasivos, la frecuencia de los medios de regulacion de tiempo, locales es indeterminada, estando sin especificar hasta que el transmisor esté en operacion.
MX9803671A 1995-11-09 1998-05-08 Deteccion mejorada de transmisiones de datos multiples. MX9803671A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA959519 1995-11-09

Publications (1)

Publication Number Publication Date
MX9803671A true MX9803671A (es) 1998-09-30

Family

ID=25585411

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9803671A MX9803671A (es) 1995-11-09 1998-05-08 Deteccion mejorada de transmisiones de datos multiples.

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 (16)

* 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
JP2003500975A (ja) * 1999-05-21 2003-01-07 ケーナー，ラルフ・ジェイ 規定された集合のメンバーの存在／不在をモニタするための識別システム
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
JP4847344B2 (ja) * 2004-01-12 2011-12-28 ネクスティビティ・インコーポレイテッド 短距離セルラ・ブースタ
WO2006079972A1 (en) * 2005-01-31 2006-08-03 Nxp B.V. Improved 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
EP0859989A1 (en) 1998-08-26
AU7502396A (en) 1997-05-29
CA2235585A1 (en) 1997-05-15
BR9611705A (pt) 1999-02-23
TW383527B (en) 2000-03-01
WO1997017667A1 (en) 1997-05-15
JP2000500932A (ja) 2000-01-25
AR002220A1 (es) 1998-03-11
CN1201540A (zh) 1998-12-09
KR19990067371A (ko) 1999-08-16

Similar Documents

Publication Publication Date Title
MX9803671A (es) Deteccion mejorada de transmisiones de datos multiples.
MY109809A (en) Detection of multiple articles
EP0285419B1 (en) Access control equipment
EP1204954B1 (en) Electronic article security system employing variable time shifts
SG48262A1 (en) Synchronised electronic identification system
ZA997009B (en) Electronic identification system.
US5083111A (en) Jamming apparatus for electronic article surveillance systems
EP1342382B1 (en) Method for reading multiple transponders in an rfid system
RU93049090A (ru) Система идентификации с опросным устройством и множеством ответчиков, ответчик системы идентификации
HK143796A (en) Identification apparatus and method
US5883592A (en) Method and apparatus for remotely identifying an electronically coded article
JPH028770A (ja) 移動体識別装置
MY124315A (en) Synchronised electronic identification system
EP0890928A2 (en) Transmission apparatus and remotely identifying an electronically coded article
KR950026149A (ko) 동기 전자 식별 시스템