Communication partner appliance with automatic send mode activation

Patent metadata

Field	Value
Publication number	US-9374137-B2
Application number	US-201514642661-A
Country	US
Kind code	B2
Filing date	Mar 9, 2015
Priority date	Oct 29, 2003
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

A communication partner appliance is implemented within a near field communication system. The communication partner appliance includes a receiver, a detector, and a processor. The receiver receives a NFC command signal from another communication partner appliance. The detector detects whether a carrier signal from the other communication partner appliance is present at the receiver at a time other than during a transmission of the NFC command signal from the other communication partner appliance to the receiver. The processor controls a power supply element based on a determination by the detector whether the carrier signal from the other communication partner appliance is present at the receiver. The power supply element is configured to establish a connection to either a first power supply or a second power supply. The first power supply is dependent on the carrier signal, and the second power supply is independent of the carrier signal.

First claim

What is claimed is:

1. A communication partner appliance comprising:
a transmitter configured to transmit a near-field communication (NFC) command signal to another communication partner appliance according to an active communication mode, wherein the NFC command signal includes a request for data from the other communication partner appliance; and
a processor coupled to a generator and the transmitter, wherein the processor is configured to switch from the active communication mode to a passive communication mode in response to a determination that a response signal is not received from the other communication partner appliance within a first time period based upon a predetermined number of oscillations of a carrier signal.

2. The communication partner appliance of claim 1 , wherein the predetermined number of oscillations of the carrier signal is between 10 and 90.

3. The communication partner appliance of claim 2 , wherein the predetermined number of oscillations of the carrier signal is between 20 and 60.

4. The communication partner appliance of claim 3 , wherein the predetermined number of oscillations of the carrier signal is substantially 30.

5. The communication partner appliance of claim 1 , wherein the processor is configured to transmit a second activation signal after completion of a second time period based upon a second number of oscillations of the carrier signal.

6. The communication partner appliance of claim 5 , wherein the second time period is substantially three times the first time period.

7. The communication partner appliance of claim 5 , wherein the second time period is substantially four times the first time period.

8. The communication partner appliance of claim 5 , wherein the second number of oscillations of the carrier signal is substantially 60.

Assignees

• Nxp Bv

Inventors

• Breitfuss Klemens

Classifications

• G06K7/0008 Primary

  General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer · CPC title

• H04B5/20

  characterised by the transmission technique; characterised by the transmission medium · CPC title

• H04B5/0031 Primary

  Electricity · mapped topic

• H04W4/008

  Electricity · mapped topic

• G06K19/0723

  the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs · CPC title