Techniques for communication with tag devices

• US 9,531,443 B2
• Filed: 03/29/2014
• Issued: 12/27/2016
• Est. Priority Date: 03/29/2014
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Hussain, Jafer
• Primary Examiner(s): Lu, Zhiyu
• Application Number:
  US14/229,853
• Publication Number:
  US 20150280789A1
• Time in Patent Office: 1,004 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/77 for interrogation
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Various embodiments are generally directed to techniques for resolving interference in near field communications (NFC) among multiple NFC tag devices communicating with a reading device in which one of the tag devices employs a Tag-Talks-First (TTF) protocol while the others use a Request-Response (RR) protocol. An apparatus to communicate with tag devices via near NFC includes a timing component to determine an amount of time remaining in a current sleep pause between two consecutive transmissions of a TTF tag device; and a communications component to determine whether the amount of time remaining in the current sleep pause is sufficient to transmit a request for response to a RR tag device and receive a response to the request from the RR tag device, and to transmit the request based on the amount of time remaining in the current sleep pause. Other embodiments are described and claimed.

Claims

1. An apparatus to communicate with tag devices via near field communications (NFC) comprising:

a processor component;

a timing component for execution by the processor component to determine an amount of time remaining in a current sleep pause between two consecutive transmissions of a Tag-Talks-First (TTF) tag device; and

a communications component for execution by the processor component to;

determine whether the amount of time remaining in the current sleep pause is sufficient to transmit a request for response to a Response-Request (RR) tag device and receive a response to the request from the RR tag device,

in response to determining that the amount of time remaining in the current sleep pause is sufficient, transmit the request based on the amount of time remaining in the current sleep pause, and

in response to determining that the amount of time remaining in the current sleep pause is insufficient, reorder an ordering of requests for response to cause a different request for response to be transmitted to a different RR tag device and transmit the different request if the amount of time remaining is sufficient to transmit the different request and receive a response to the different request from the different RR tag device.

2. The apparatus of claim 1, comprising:

an antenna;

an interface coupling the antenna to the processor component; and

a power transmission component for execution by the processor component to operate the interface to generate an electromagnetic field in a vicinity of the antenna to wirelessly provide electric power to at least one of the TTF tag device or the RR tag device.

3. The apparatus of claim 2, comprising a TTF detection component for execution by the processor component to operate the interface to await reception of a transmission of the TTF tag device for a predetermined period of time following commencement of generating the electromagnetic field, to determine whether a transmission received during the predetermined period of time has at least one characteristic of a transmission from a TTF tag device, and to determine whether the TTF tag device is present in the vicinity of the antenna based on receiving the transmission during the predetermined period of time and the transmission having the at least one characteristic, the at least one characteristic comprising at least one of an expected encoding, an expected bitrate, an expected length in bits or an expected error checking mechanism.

4. The apparatus of claim 1, comprising a RR detection component for execution by the processor component to transmit the request for response, to determine whether the response to the request has at least one characteristic of a transmission from a RR tag device, and to determine whether the RR tag device is present based on the response to the request having the at least one characteristic, the at least one characteristic comprising at least one of an expected encoding, an expected bitrate, an expected length in bits, or an expected error checking mechanism.

5. The apparatus of claim 4, the RR detection component to determine whether the RR tag device uses a type of NFC in which there is insufficient time available in any sleep pause between consecutive transmissions of the TTF tag device to transmit the request for response and to receive the response, the apparatus comprising a user interface component to present a request to separate a tag device to use in support of a transaction from multiple tag devices based on the insufficiency of time available in any sleep pause, the multiple tag devices comprising the TTF tag device and the RR tag device.

6. The apparatus of claim 1, the communications component to determine whether the amount of time remaining in the current sleep pause is sufficient to transmit a next request for response following receipt of the response and receive a response to the next request, and to transmit the next request based on the amount of time remaining in the current sleep pause.

7. The apparatus of claim 6, the communications component to determine whether the amount of time remaining in the current sleep pause is sufficient to transmit another request for response following receipt of the response in lieu of the next request and receive a response to the other request, and to transmit the other request based on the amount of time remaining in the current sleep pause and in response to the amount of time remaining in the current sleep pause being insufficient for transmitting the next request and receiving the response to the next request.

8. A computer-implemented method for communicating with tag devices via near field communications (NFC) comprising:

determining an amount of time remaining in a current sleep pause between two consecutive transmissions of a Tag-Talks-First (TTF) tag device;

determining whether the amount of time remaining in the current sleep pause is sufficient to transmit a request for response to a Response-Request (RR) tag device and receive a response to the request from the RR tag device;

transmitting, in response to determining the amount of time remaining in the current sleep pause is sufficient, the request based on the amount of time remaining in the current sleep pause; and

reordering, in response to determining the amount of time remaining in current pause is insufficient, an ordering of requests for response to cause a different response to be transmitted to a different RR tag device.

9. The computer-implemented method of claim 8, the method comprising generating an electromagnetic field in a vicinity of an antenna to wirelessly provide electric power to at least one of the TTF tag device or the RR tag device.

10. The computer-implemented method of claim 9, the method comprising:

awaiting reception of a transmission of the TTF tag device for a predetermined period of time following commencement of generating the electromagnetic field;

determining whether a transmission received during the predetermined period of time has at least one characteristic of a transmission from a TTF tag device, the at least one characteristic comprising at least one of an expected encoding, an expected bitrate, an expected length in bits or an expected error checking mechanism; and

determining whether the TTF tag device is present in the vicinity of the antenna based on receiving the transmission during the predetermined period of time and the transmission having the at least one characteristic.

11. The computer-implemented method of claim 9, the method comprising:

determining whether the response to the request has at least one characteristic of a transmission from a RR tag device, the at least one characteristic comprising at least one of an expected encoding, an expected bitrate, an expected length in bits, or an expected error checking mechanism; and

determining whether the RR tag device is present in the vicinity of the antenna based on the response to the request having the at least one characteristic.

12. The computer-implemented method of claim 11, the method comprising:

determining whether the RR tag device uses a type of NFC in which there is insufficient time available in any sleep pause between consecutive transmissions of the TTF tag device to transmit the request for response and to receive the response; and

presenting a request to separate a tag device to use in support of a transaction from multiple tag devices based on the insufficiency of time available in any sleep pause, the multiple tag devices comprising the TTF tag device and the RR tag device.

13. The computer-implemented method of claim 8, the method comprising:

determining whether the amount of time remaining in the current sleep pause is sufficient to transmit a next request for response following receipt of the response and receive a response to the next request; and

transmitting the next request based on the amount of time remaining in the current sleep pause.

14. The computer-implemented method of claim 13, the method comprising:

determining whether the amount of time remaining in the current sleep pause is sufficient to transmit another request for response following receipt of the response in lieu of the next request and receive a response to the other request; and

transmitting the other request based on the amount of time remaining in the current sleep pause and in response to the amount of time remaining in the current sleep pause being insufficient for transmitting the next request and receiving the response to the next request.

15. At least one non-transitory machine-readable storage medium comprising instructions that when executed by a computing device, cause the computing device to:

determine an amount of time remaining in a current sleep pause between two consecutive transmissions of a Tag-Talks-First (TTF) tag device;

determine whether the amount of time remaining in the current sleep pause is sufficient to transmit a request for response to a Response-Request (RR) tag device and receive a response to the request from the RR tag device;

transmit, in response to determining the amount of time remaining in the current sleep pause is sufficient, the request based on the amount of time remaining in the current sleep pause; and

reordering, in response to determining the amount of time remaining in the current pause is insufficient, an ordering of requests for response to cause a different response to be transmitted to a different RR tag device.

16. The at least one non-transitory machine-readable storage medium of claim 15, the computing device caused to generate an electromagnetic field in a vicinity of an antenna to wirelessly provide electric power to at least one of the TTF tag device or the RR tag device.

17. The at least one non-transitory machine-readable storage medium of claim 16, the computing device caused to:

await reception of a transmission of the TTF tag device for a predetermined period of time following commencement of generating the electromagnetic field;

determine whether a transmission received during the predetermined period of time has at least one characteristic of a transmission from a TTF tag device, the at least one characteristic comprising at least one of an expected encoding, an expected bitrate, an expected length in bits or an expected error checking mechanism; and

determine whether the TTF tag device is present in the vicinity of the antenna based on receiving the transmission during the predetermined period of time and the transmission having the at least one characteristic.

18. The at least one non-transitory machine-readable storage medium of claim 17, the computing device caused to:

determine whether there is another TTF tag device in the vicinity of the antenna; and

present a request to separate a tag device to use in support of a transaction from multiple tag devices, the multiple tag devices comprising the TTF tag device and the other TTF tag device.

19. The at least one non-transitory machine-readable storage medium of claim 15, the computing device caused to identify the RR tag device based on an identification (ID) data in the response.

20. The at least one non-transitory machine-readable storage medium of claim 15, the computing device caused to transmit the request for response as part of an anti-collision protocol to resolve a collision in transmissions between the RR tag device and another RR tag device.