CA2267437A1 - System for short range wireless data communication to inexpensive endpoints - Google Patents

System for short range wireless data communication to inexpensive endpoints Download PDF

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Publication number
CA2267437A1
CA2267437A1 CA002267437A CA2267437A CA2267437A1 CA 2267437 A1 CA2267437 A1 CA 2267437A1 CA 002267437 A CA002267437 A CA 002267437A CA 2267437 A CA2267437 A CA 2267437A CA 2267437 A1 CA2267437 A1 CA 2267437A1
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CA
Canada
Prior art keywords
interrogator
tags
endpoints
inexpensive
range wireless
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.)
Granted
Application number
CA002267437A
Other languages
French (fr)
Other versions
CA2267437C (en
Inventor
John Austin Maclellan
R. Anthony Shober
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.)
Nokia of America Corp
Original Assignee
Lucent Technologies Inc.
John Austin Maclellan
R. Anthony Shober
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 Lucent Technologies Inc., John Austin Maclellan, R. Anthony Shober filed Critical Lucent Technologies Inc.
Publication of CA2267437A1 publication Critical patent/CA2267437A1/en
Application granted granted Critical
Publication of CA2267437C publication Critical patent/CA2267437C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H04B5/48—
    • 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
    • G06K7/10297—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 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks

Abstract

A system provides short range wireless data communication from a central control point (e.g., interrogator) to inexpensive endpoints (e.g., tags). The endpoints utilize the technology of modulated backscatter for transmission from the tags to the interrogator. The system uses a new downlink protocol for data transmission from the interrogator to the tags and a new uplink protocol for data transmission from the tags to the interrogator. Both protocols use a backoff/retry algorithm to randomly retransmit any non-acknowledged messages. System capacity from the tags to the interrogator is further enhanced by the use of uplink subcarrier frequency division multiplexing.
CA002267437A 1998-07-17 1999-03-30 System for short range wireless data communication to inexpensive endpoints Expired - Lifetime CA2267437C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/118,647 US6177861B1 (en) 1998-07-17 1998-07-17 System for short range wireless data communication to inexpensive endpoints
US09/118,647 1998-07-17

Publications (2)

Publication Number Publication Date
CA2267437A1 true CA2267437A1 (en) 2000-01-17
CA2267437C CA2267437C (en) 2002-10-01

Family

ID=22379893

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002267437A Expired - Lifetime CA2267437C (en) 1998-07-17 1999-03-30 System for short range wireless data communication to inexpensive endpoints

Country Status (5)

Country Link
US (1) US6177861B1 (en)
EP (1) EP0973117B1 (en)
JP (1) JP3708354B2 (en)
KR (1) KR100322425B1 (en)
CA (1) CA2267437C (en)

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Also Published As

Publication number Publication date
JP3708354B2 (en) 2005-10-19
KR20000011206A (en) 2000-02-25
CA2267437C (en) 2002-10-01
EP0973117B1 (en) 2019-12-11
US6177861B1 (en) 2001-01-23
EP0973117A3 (en) 2002-08-28
KR100322425B1 (en) 2002-03-18
EP0973117A2 (en) 2000-01-19
JP2000049656A (en) 2000-02-18

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