CA2266337C - Systeme d'etiquettes avec des caracteristiques anti-collision - Google Patents

Systeme d'etiquettes avec des caracteristiques anti-collision Download PDF

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Publication number
CA2266337C
CA2266337C CA002266337A CA2266337A CA2266337C CA 2266337 C CA2266337 C CA 2266337C CA 002266337 A CA002266337 A CA 002266337A CA 2266337 A CA2266337 A CA 2266337A CA 2266337 C CA2266337 C CA 2266337C
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CA
Canada
Prior art keywords
bit
slave
master
time
identification number
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.)
Expired - Lifetime
Application number
CA002266337A
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English (en)
Other versions
CA2266337A1 (fr
Inventor
Vladimir Federman
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.)
Individual
Original Assignee
eXI Wireless Systems Inc
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 eXI Wireless Systems Inc filed Critical eXI Wireless Systems Inc
Priority to CA002266337A priority Critical patent/CA2266337C/fr
Publication of CA2266337A1 publication Critical patent/CA2266337A1/fr
Application granted granted Critical
Publication of CA2266337C publication Critical patent/CA2266337C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2488—Timing issues, e.g. synchronising measures to avoid signal collision, with multiple emitters or a single emitter and receiver
    • 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
    • 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
    • G06K7/10039—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 interrogator driven, i.e. synchronous
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/007—Details of data content structure of message packets; data protocols
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnetism (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Computer Security & Cryptography (AREA)
  • Automation & Control Theory (AREA)
  • General Health & Medical Sciences (AREA)
  • Mobile Radio Communication Systems (AREA)
CA002266337A 1999-03-23 1999-03-23 Systeme d'etiquettes avec des caracteristiques anti-collision Expired - Lifetime CA2266337C (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002266337A CA2266337C (fr) 1999-03-23 1999-03-23 Systeme d'etiquettes avec des caracteristiques anti-collision

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002266337A CA2266337C (fr) 1999-03-23 1999-03-23 Systeme d'etiquettes avec des caracteristiques anti-collision

Publications (2)

Publication Number Publication Date
CA2266337A1 CA2266337A1 (fr) 2000-09-23
CA2266337C true CA2266337C (fr) 2004-06-08

Family

ID=29588607

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002266337A Expired - Lifetime CA2266337C (fr) 1999-03-23 1999-03-23 Systeme d'etiquettes avec des caracteristiques anti-collision

Country Status (1)

Country Link
CA (1) CA2266337C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7716208B2 (en) 2003-11-07 2010-05-11 Alien Technology Corporation RFID handshaking
US8102244B2 (en) 2003-08-09 2012-01-24 Alien Technology Corporation Methods and apparatuses to identify devices
US8279047B2 (en) 2001-10-09 2012-10-02 Alien Technology Corporation Methods and apparatus for anti-collision for radio frequency communication

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6988667B2 (en) 2001-05-31 2006-01-24 Alien Technology Corporation Methods and apparatuses to identify devices
FR2834811B1 (fr) * 2002-01-17 2004-04-16 A S K Procede d'anti-collision d'elements a identifier par un ordinateur hote

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8279047B2 (en) 2001-10-09 2012-10-02 Alien Technology Corporation Methods and apparatus for anti-collision for radio frequency communication
US8102244B2 (en) 2003-08-09 2012-01-24 Alien Technology Corporation Methods and apparatuses to identify devices
US8742899B2 (en) 2003-08-09 2014-06-03 Alien Technology Corporation Methods and apparatuses to identify devices
US7716208B2 (en) 2003-11-07 2010-05-11 Alien Technology Corporation RFID handshaking
US8768952B2 (en) 2003-11-07 2014-07-01 Alien Technology Corporation Methods and apparatuses to identify devices
US9483671B2 (en) 2003-11-07 2016-11-01 Ruizhang Technology Limited Company Methods and apparatuses to identify devices

Also Published As

Publication number Publication date
CA2266337A1 (fr) 2000-09-23

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Effective date: 20190325