WO1999038272A3 - Short range magnetic inductive communication - Google Patents

Short range magnetic inductive communication Download PDF

Info

Publication number
WO1999038272A3
WO1999038272A3 PCT/US1999/001285 US9901285W WO9938272A3 WO 1999038272 A3 WO1999038272 A3 WO 1999038272A3 US 9901285 W US9901285 W US 9901285W WO 9938272 A3 WO9938272 A3 WO 9938272A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
signals
base unit
remote unit
headset
Prior art date
Application number
PCT/US1999/001285
Other languages
French (fr)
Other versions
WO1999038272A2 (en
Inventor
Peter M Flowerdew
Ian Dobie
Peter Reid
Jonathan Rogers
Scott Walsh
Paul Ewer
Original Assignee
Plantronics
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 Plantronics filed Critical Plantronics
Priority to AU24629/99A priority Critical patent/AU2462999A/en
Publication of WO1999038272A2 publication Critical patent/WO1999038272A2/en
Publication of WO1999038272A3 publication Critical patent/WO1999038272A3/en

Links

Classifications

    • H04B5/48—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive loop type

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Audio communication using magnetic inductive (MI) fields for a full duplex cordless communication link is disclosed. A single communication system can include a base unit and a remote unit with a headset which are linked cordlessly by MI signals. The base unit receives audio signals from a host system, frequency modulates a carrier frequency signal, and transmits this to the remote unit as an MI signal. The remote unit receives the MI signal and demodulates it to produce the base audio signal which is passed to the headset. Similarly, the remote unit receives audio signals from the headset (typically the user's voice), frequency modulates a carrier frequency signal, and transmits this to the base unit as an MI signal, whereupon the base unit receives and demodulates the MI signal to produce the remote audio signal for passage to the host system. Frequency modulation allows for a plurality of cordless communication channels across a usable spectrum of frequencies. The provision of a plurality of channels and full duplex MI links allows implementation in high user density applications, wherein a plurality of cordless communication channels are used to allow independent cordless links between unit pairs. Channel allocation including channel slots with a bandwidth that exceeds the occupied bandwidth for signals transmitted between the units facilitates the avoidance of interfering signals without requiring channel slot redefinition. Security codes are provided to prevent unpaired units from communicating with each other. A supervisory remote unit is able to receive signals from any base unit without verification of the security code. Under various circumstances, an agent not available signal is transmitted to a telephone system to indicate the availability or unavailability of a telephone line.
PCT/US1999/001285 1998-01-21 1999-01-21 Short range magnetic inductive communication WO1999038272A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24629/99A AU2462999A (en) 1998-01-21 1999-01-21 Short range magnetic inductive communication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US990498A 1998-01-21 1998-01-21
US09/009,904 1998-01-21

Publications (2)

Publication Number Publication Date
WO1999038272A2 WO1999038272A2 (en) 1999-07-29
WO1999038272A3 true WO1999038272A3 (en) 1999-12-16

Family

ID=21740396

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/001285 WO1999038272A2 (en) 1998-01-21 1999-01-21 Short range magnetic inductive communication

Country Status (2)

Country Link
AU (1) AU2462999A (en)
WO (1) WO1999038272A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7142811B2 (en) * 2001-03-16 2006-11-28 Aura Communications Technology, Inc. Wireless communication over a transducer device
DK2117180T3 (en) 2008-05-07 2014-02-03 Oticon As A short-range wireless one-way connection
US10451439B2 (en) 2016-12-22 2019-10-22 Microsoft Technology Licensing, Llc Dynamic transmitter power control for magnetic tracker
US11582612B2 (en) 2018-06-12 2023-02-14 Impulse Dynamics Nv Power coupling modulation transmission
EP3939170A1 (en) 2019-03-12 2022-01-19 Impulse Dynamics NV Secure short-range communications link for medical devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333175A (en) * 1993-01-28 1994-07-26 Bell Communications Research, Inc. Method and apparatus for dynamic power control in TDMA portable radio systems
WO1996010878A1 (en) * 1994-10-03 1996-04-11 Phonic Ear Incorporated Very low power cordless headset system
WO1996037052A1 (en) * 1995-05-18 1996-11-21 Aura Communications, Inc. Short-range magnetic communication system
WO1996037082A1 (en) * 1995-05-18 1996-11-21 Nokia Telecommunications Oy Increasing capacity in a cellular mobile telephone network

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333175A (en) * 1993-01-28 1994-07-26 Bell Communications Research, Inc. Method and apparatus for dynamic power control in TDMA portable radio systems
WO1996010878A1 (en) * 1994-10-03 1996-04-11 Phonic Ear Incorporated Very low power cordless headset system
WO1996037052A1 (en) * 1995-05-18 1996-11-21 Aura Communications, Inc. Short-range magnetic communication system
WO1996037082A1 (en) * 1995-05-18 1996-11-21 Nokia Telecommunications Oy Increasing capacity in a cellular mobile telephone network

Also Published As

Publication number Publication date
WO1999038272A2 (en) 1999-07-29
AU2462999A (en) 1999-08-09

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