Communication partner appliance with automatic send mode activation

• US 8,249,503 B2
• Filed: 02/27/2012
• Issued: 08/21/2012
• Est. Priority Date: 10/29/2003
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Breitfuss, Klemens
• Primary Examiner(s): Nguyen, Duc
• Assistant Examiner(s): Jain, Ankur
• Application Number:
  US13/405,778
• Publication Number:
  US 20120156995A1
• Time in Patent Office: 176 Days
• Field of Search: 455/41.1
• US Class Current: 455/41.1
• CPC Class Codes: G06K 19/0707 the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation G06K19/0702 takes precedence
• CPC Class Codes: G06K 19/0712 the arrangement being capable of triggering distinct operating modes or functions dependent on the strength of an energy or interrogation field in the proximity of the record carrier active means for hindering electromagnetic reading or writing G06K19/07336
• CPC Class Codes: G06K 19/0723 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 Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

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 and generates a corresponding status signal. The processor receives the command signal from the receiver, recognizes an end of the command signal, receives the status signal from the detector after the end of the command signal, and controls a power supply element based on the status signal after the end of the command signal. 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.

Claims

1. A communication partner appliance comprising:

a receiver to receive a near field communication (NFC) command signal from another communication partner appliance;

a detector coupled to the receiver, wherein the detector is configured to detect whether a carrier signal from the other communication partner appliance is present at the receiver and to generate a status signal that represents whether the carrier signal is present at the receiver; and

a processor coupled to the receiver and the detector, wherein the processor is configured to;

receive the command signal from the receiver;

recognize an end of the command signal;

receive the status signal from the detector after the end of the command signal; and

control a power supply element based on the status signal after the end of the command signal, wherein the power supply element is configured to establish a connection to either a first power supply or a second power supply, wherein the first power supply is dependent on the carrier signal, and the second power supply is independent of the carrier signal.

2. The communication partner appliance of claim 1, wherein the processor is further configured to activate a passive communication mode using the first power supply that is dependent on the carrier signal from the other communication partner appliance.

3. The communication partner appliance of claim 2, wherein the processor is further configured to generate and transmit a carrier signal present signal (PS) within the communication partner appliance.

4. The communication partner appliance of claim 3, further comprising a transmitter coupled to the processor, wherein the transmitter is configured to transmit a response from the communication partner appliance to the other communication partner appliance according to the passive communication mode in which the first power supply is dependent on the carrier signal from the other communication partner appliance.

5. The communication partner appliance of claim 1, wherein the processor is further configured to activate an active communication mode using the second power supply that is independent of the carrier signal from the other communication partner appliance.

6. The communication partner appliance of claim 5, further comprising a transmitter coupled to the processor, wherein the transmitter is configured to transmit a response from the communication partner appliance to the other communication partner appliance according to the active communication mode in which the second power supply is independent of the carrier signal from the other communication partner appliance.

7. The communication partner appliance of claim 6, wherein the second power supply comprises a battery.

8. The communication partner appliance of claim 1, further comprising a transmitter coupled to the processor, wherein the transmitter is configured to transmit data to the other communication partner appliance using the power supply to which the connection is established by the power supply element.

9. A method comprising:

receiving, at a first communication partner appliance, a near-field communication (NFC) command signal from a second communication partner appliance;

detecting whether a carrier signal from the second communication partner appliance is present at the first communication partner appliance;

generating, within the first communication partner appliance, a status signal that represents whether the carrier signal is present at the first communication partner appliance;

recognizing an end of the command signal at the first communication partner appliance; and

controlling a power supply element of the first communication partner appliance based on the status signal after the end of the command signal, wherein the power supply element is configured to establish a connection to either a first power supply or a second power supply, wherein the first power supply is dependent on the carrier signal, and the second power supply is independent of the carrier signal.

10. The method of claim 9, further comprising:

determining that the carrier signal from the second communication partner appliance is present at the first communication partner appliance after the end of the command signal; and

generating and transmitting a carrier signal present signal (PS) within the first communication partner appliance.

11. The method of claim 10, further comprising transmitting a response from the first communication partner appliance to the second communication partner appliance according to a passive communication mode in which the first power supply is dependent on the carrier signal from the second communication partner appliance.

12. The method of claim 9, further comprising:

determining that the carrier signal from the second communication partner appliance is not present at the first communication partner appliance after the end of the command signal; and

generating and transmitting a carrier signal not present signal (NPS) within the first communication partner appliance.

13. The method of claim 12, further comprising transmitting a response from the first communication partner appliance to the second communication partner appliance according to an active communication mode in which the second power supply is independent of the carrier signal from the second communication partner appliance.