Radio frequency discovery method, chip, and device

Patent metadata

Field	Value
Publication number	US-10103783-B2
Application number	US-201515580269-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Jun 30, 2015
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

Embodiments described in the present disclosure disclose a radio frequency discovery method that relates to a first device and a second device. At least two applications are installed on the first device. After a user selects a first application from the at least two applications, a near field communication controller in the first device obtains an RF technology supported by the first application; determines at least one to-be-used RF technology in information indicating the RF technology supported by the first application; then receives a detection command sent by the second device for a first RF technology; and when the to-be-used RF technology includes the first RF technology, sends a response message for the detection command to the second device; or when the to-be-used RF technology does not include the first RF technology, determines not to send a response message for the detection command.

First claim

What is claimed is:

1. A radio frequency (RF) discovery method, wherein the method is applied to a near field communication controller (NFCC) in a first device, at least two applications are installed on the first device, and the radio frequency discovery method comprises:
obtaining, by the NFCC, information indicating an RF technology supported by a first application, wherein the first application is an application selected by a user from the at least two applications;
determining, by the NFCC, at least one to-be-used RF technology in the RF technology supported by the first application;
receiving, by the NFCC, a detection command sent by a second device for a first RF technology; and
sending, by the NFCC, a response message for the detection command to the second device when the to-be-used RF technology comprises the first RF technology; or determining, by the NFCC, not to send a response message for the detection command when the to-be-used RF technology does not comprise the first RF technology.

2. The method according to claim 1 , wherein the obtaining, by the NFCC, the information indicating an RF technology supported by a first application comprises:
receiving, by the NFCC, a first instruction message sent by a device host (DH), wherein the first instruction message carries the RF technology supported by the first application, and the first instruction message is used to instruct the NFCC to determine the at least one to-be-used RF technology in the RF technology supported by the first application; and
obtaining, by the NFCC by using the first instruction message, the RF technology supported by the first application.

3. The method according to claim 2 , wherein before the receiving, by the NFCC, a first instruction message sent by a DH, the radio frequency discovery method further comprises:
sending, by the NFCC, a first request message to the DH, wherein the first request message carries an identifier of the first application, and the first request message is used to request the DH to query, according to the identifier of the first application, the RF technology supported by the first application.

4. The method according to claim 1 , wherein the obtaining, by the NFCC, the information indicating an RF technology supported by a first application comprises:
obtaining, by the NFCC from a near field communication execution environment (NFCEE) in which the first application is located, the RF technology supported by the first application.

5. The method according to claim 4 , wherein after the obtaining, by the NFCC, an RF technology supported by a first application, the radio frequency discovery method further comprises:
sending, by the NFCC, a second request message to a DH, wherein the second request message carries at least one of the following: an identifier of the NFCEE in which the first application is located, an identifier of the first application, or the RF technology supported by the first application; and
receiving, by the NFCC, a second instruction message sent by the DH, wherein the second instruction message is used to instruct the NFCC to determine the at least one to-be-used RF technology in the RF technology supported by the first application.

6. The method according to claim 1 , wherein before the determining, by the NFCC, at least one to-be-used RF technology in the RF technology supported by the first application, the radio frequency discovery method further comprises:
determining, by the NFCC, whether instruction information allows the NFCC to determine the at least one to-be-used RF technology in the RF technology supported by the first application, wherein the instruction information is a parameter preconfigured in the NFCC, and the instruction information indicates whether the NFCC is allowed to determine the at least one to-be-used RF technology in the RF technology supported by the first application.

7. The method according to claim 1 , wherein the radio frequency discovery method further comprises:
setting, by the NFCC, all or some of the to-be-used RF technology to a to-be-used RF technology within a preset time.

8. An NFC chip, wherein the NFC chip is disposed in a first device, at least two applications are installed on the first device, and the NFC chip comprises:
a processor, configured to:
obtain information indicating an RF technology supported by a first application, wherein the first application is an application selected by a user from the at least two applications;
determine at least one to-be-used RF technology in the RF technology supported by the first application;
instruct a receiver to receive a detection command sent by a second device for a first RF technology; and
instruct a transmitter to send a response message for the detection command to the second device when the to-be-used RF technology comprises the first RF technology; or determine not to send a response message for the detection command when the to-be-used RF technology does not comprise the first RF technology;
the receiver, configured to receive the detection command sent by the second device for the first RF technology;
the transmitter, configured to send the response message for the detection command to the second device;
a memory, configured to store program code; and
a communications bus, configured to connect the receiver, the transmitter, the processor, and the memory.

9. The NFC chip according to claim 8 , wherein the receiver is further configured to receive a first instruction message sent by a device host (DH), wherein the first instruction message carries the information indicating the RF technology supported by the first application, and the first instruction message is used to instruct the NFC chip to determine the at least one to-be-used RF technology in the RF technology supported by the first application; and
that the processor is configured to obtain the RF technology supported by the first application comprises:
the processor is configured to obtain, by using the first instruction message, the RF technology supported by the first application.

10. The NFC chip according to claim 9 , wherein before the receiver receives the first instruction message sent by the DH,
the transmitter is further configured to send a first request message to the DH, wherein the first request message carries an identifier of the first application, and the first request message is used to request the DH to query, according to the identifier of the first application, the RF technology supported by the first application.

11. The NFC chip according to claim 8 , wherein the memory is further configured to store the first application, and that the processor is configured to obtain the RF technology supported by the first application comprises:
the processor is configured to obtain, from the memory, the RF technology supported by the first application.

12. The NFC chip according to claim 11 , wherein after the processor obtains the RF technology supported by the first application,
the transmitter is further configured to send a second request message to a DH, wherein the second request message carries at least one of the following: an identifier of the memory, an identifier of the first application, or the RF technology supported by the first application; and
the receiver is further configured to receive a second instruction message sent by the DH, wherein the second instruction message is used to instruct the NFC chip to determine the at least one to-be-used RF technology in the RF technology supported by the first application.

13. The NFC chip according to claim 8 , wherein before the processor determines the at least one to-b

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhao Xiaona
• Mei Jingqing
• Chang Xinmiao

Classifications

• H04W4/80 Primary

  Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication · CPC title

• H04W8/005

  Discovery of network devices, e.g. terminals · CPC title

• H04B5/0037

  Electricity · mapped topic

• H04B5/0031 Primary

  Electricity · mapped topic

• H04W88/023

  with message or information receiving capability · CPC title