CN106792490A - A near field communication method and terminal - Google Patents

Abstract

The invention discloses a near field communication method and a terminal, wherein the method comprises the following steps: detecting an NFC device; when the NFC equipment is detected, judging that the NFC equipment is from a first direction or a second direction of an NFC antenna of a terminal, wherein the first direction is different from the second direction; and when the NFC equipment comes from the first direction, communicating with the NFC equipment in a first working mode, wherein the first working mode is an active reading mode or a passive reading mode. Therefore, the detected NFC equipment can directly enter a required working mode as long as the detected NFC equipment approaches the terminal from a specific direction, so that the operation is simplified, and the user experience is improved.

Description

A near field communication method and terminal

technical field

The invention relates to the technical field of near field communication, in particular to a near field communication method and terminal.

Background technique

Near Field Communication (NFC) is a short-range high-frequency radio technology that operates at a frequency of 13.56 MHz within a distance of 10 cm. At present, NFC has passed the ISO/IEC IS 18092 international standard, ECMA-340 standard and ETSI TS 102 190 standard.

The working modes of NFC devices include card emulation, peer-to-peer mode (P2P mode) and card reader mode (Reader/writer mode). Among them, the card mode is equivalent to an IC card using RFID technology, which can replace a large number of IC cards in shopping malls, bus cards, access control, tickets, tickets, etc.; the point-to-point mode is used for data exchange, and two NFC-enabled The device connection can realize data point-to-point transmission, such as downloading music, exchanging pictures or synchronizing device address book, so through NFC, multiple devices such as digital cameras, PDAs, computers and mobile phones can exchange data or services; card reader Mode is used as a contactless card reader, such as reading relevant information from posters or electronic tags for exhibition information. Among these three modes, the card mode is a passive reading mode, and the NFC device does not emit a radio frequency field to the outside, but senses an external radio frequency field. The point-to-point mode and the card reader mode are active reading modes, and the NFC device emits a RF field.

When an existing NFC device is working, it usually detects an external NFC device in a polling manner. In an existing NFC device polling cycle as shown in Figure 1, the NFC controller starts to emit a radio frequency field (active read mode) from the NFC Active stage, detects the surrounding NFC devices, and detects NFC-A, NFC -B, NFC-F, other (other types of NFC technology, such as ISO15693) and other NFC devices, after that enter the card emulation stage (passive read mode) and stop emitting RF fields.

However, the existing NFC devices have the following defects: when two NFC devices that are close to each other are in the state of transmitting radio frequency fields, they will first enter the point-to-point working mode. If the user's original intention is to use one of the NFC devices as a card simulation To use it, you need to turn off the point-to-point function of the device as a card simulation or turn off the screen; when two NFC devices that are close to each other are in the state of transmitting radio frequency fields, and the other is in the state of card simulation, it will First enter the working mode of the reader and card emulation. If the user intends to share content peer-to-peer, they can only turn off the card emulation function of both parties and try to interact again. Therefore, the interaction between existing NFC devices often cannot directly enter the required working mode, which has the defects of cumbersome operation and poor user experience.

Contents of the invention

In view of this, the embodiments of the present invention provide a near field communication method and a terminal to solve the technical problems of cumbersome interactive operations between existing NFC devices and poor user experience.

The first aspect of the embodiment of the present invention provides a near field communication method applied to a terminal, including: detecting an NFC device; when the NFC device is detected, judging that the NFC device is from the first NFC antenna of the terminal A direction or a second direction, the first direction is different from the second direction; when the NFC device comes from the first direction, communicate with the NFC device in a first working mode, the second A working mode is an active reading mode or a passive reading mode.

With reference to the first aspect of the embodiments of the present invention, the first implementation of the first aspect of the embodiments of the present invention further includes: when the NFC device comes from the second direction, communicate with the NFC device in the second working mode Communication, the second working mode is different from the first working mode.

In combination with the first implementation mode of the first aspect of the embodiment of the present invention, in the second implementation mode of the first aspect of the embodiment of the invention, the first working mode is the active reading mode, and the second working mode is the passive reading mode, The detecting the NFC device includes: detecting the NFC device from the first direction by transmitting a first NFC radio frequency signal to the first direction.

In combination with the second implementation manner of the first aspect of the embodiment of the present invention, in the third implementation manner of the first aspect of the embodiment of the present invention, the detection of the NFC device includes: when stopping transmitting the first radio frequency signal to the first direction , Stop detecting the NFC device from the first direction.

In combination with the first embodiment, the second embodiment or the third embodiment of the first aspect of the embodiments of the present invention, in the fourth embodiment of the first aspect of the embodiments of the present invention, the first working mode is an active reading mode, and the The second working mode is a passive reading mode, and the detecting the NFC device includes: detecting the NFC device from the second direction by sensing a second NFC radio frequency signal from the second direction.

The second aspect of the embodiment of the present invention provides a near-field communication terminal, including: an NFC device detection unit for detecting the NFC device; an NFC device direction judgment unit for judging the NFC device when the NFC device is detected The device comes from the first direction or the second direction of the NFC antenna of the terminal, and the first direction is different from the second direction; the first communication control unit is used when the NFC device comes from the first direction direction, communicate with the NFC device in a first working mode, where the first working mode is an active reading mode or a passive reading mode.

In combination with the second aspect of the embodiment of the present invention, in the first embodiment of the second aspect of the embodiment of the present invention, it further includes: a second communication control unit, when the NFC device comes from the second direction, the second working mode To communicate with the NFC device, the second working mode is different from the first working mode.

In combination with the first implementation of the second aspect of the embodiment of the present invention, in the second implementation of the second aspect of the embodiment of the present invention, the first working mode is the active reading mode, and the second working mode is the passive reading mode, The NFC device detection unit includes: a first NFC device detection subunit, configured to detect the NFC device from the first direction by transmitting a first NFC radio frequency signal to the first direction.

In combination with the second implementation manner of the second aspect of the embodiment of the present invention, in the third implementation manner of the second aspect of the embodiment of the present invention, the first NFC device detection subunit is further configured to stop transmitting the NFC device in the first direction When the first radio frequency signal is received, stop detecting the NFC device from the first direction.

In combination with the first implementation manner of the second aspect of the embodiments of the present invention, the second implementation manner of the second aspect of the embodiments of the present invention, or the third implementation manner of the second aspect of the embodiments of the present invention, in the fourth implementation manner of the second aspect of the embodiments of the present invention, The first working mode is an active reading mode, the second working mode is a passive reading mode, and the NFC device detection unit includes: a second NFC device detection subunit for sensing from the second a second NFC radio frequency signal from a direction to detect the NFC device from the second direction.

The near field communication method and terminal provided by the embodiments of the present invention enable the NFC device to be detected in both the first direction and the second direction of the NFC antenna of the terminal, and designate a specific direction corresponding to a specific working mode, so that the The terminal can directly enter the required working mode, thereby simplifying the operation and improving the user experience.

Description of drawings

The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the invention in any way. In the accompanying drawings:

FIG. 1 shows a schematic diagram of a polling cycle of an existing NFC device;

FIG. 2 shows a schematic diagram of an application scenario of an embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of a mobile phone according to an embodiment of the present invention;

FIG. 4 shows a flow chart of a near field communication method according to an embodiment of the present invention;

FIG. 5 shows a schematic diagram of a polling cycle of an NFC device according to an embodiment of the present invention;

Fig. 6 shows a schematic diagram of a near field communication terminal according to an embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

As shown in FIG. 2 , it is a schematic diagram of an application scenario of an embodiment of the present invention. The electronic devices 10A and 10B are smart terminals such as mobile phones or smart watches with NFC functions, and the electronic devices 10A and 10B are close to each other for communication.

The electronic device takes a mobile phone as an example. A block diagram of a part of the mobile phone is shown in FIG. 3 . Those skilled in the art can understand that the structure of the mobile phone shown in FIG. 3 does not constitute a limitation to the mobile phone, and may include more or less components than those shown in the figure, or combine some components, or arrange different components.

Combined with Figure 3, the various components of the mobile phone are introduced in detail:

The processor 31 can be a general processor, such as a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the invention. circuit.

The bus 30 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Standard Architecture (EISA) bus, or the like. The bus can be divided into address bus, data bus, control bus and so on.

The memory 32 may be a high-speed random access memory, or a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The NFC module 33 includes an NFC chip and an NFC antenna, wherein the NFC antenna may be a coil antenna, preferably a magnetic FPC antenna.

Please refer to FIG. 4, an embodiment of the present invention provides a near field communication method applied to a terminal, such as a smart terminal, including:

S41. Detecting the NFC device;

Specifically, the terminal (NFC initiating device, master device) has an NFC module, and the NFC module can work in active mode or passive mode. When working in active mode, the NFC module transmits a radio frequency field (RF-field) through the NFC antenna, To detect the target device (slave device), when working in passive mode, it is not necessary to emit a radio frequency field, but to detect the target device through the induced current in the NFC antenna. In addition, the NFC module of the terminal can detect the NFC device at least in two different directions of its NFC antenna, for example, it can detect the NFC device in the first direction and the second direction of the NFC antenna.

S42. When the NFC device is detected, it is judged that the NFC device comes from the first direction or the second direction of the NFC antenna of the terminal, and the first direction is different from the second direction;

Specifically, the NFC antenna may be a coil, an FPC coil, or a magnetic FPC coil. Thus, the first direction of the NFC antenna can be the front or the back thereof, and the second direction is the opposite of the first direction.

S43. When the NFC device comes from the first direction, communicate with the NFC device in a first working mode, where the first working mode is an active reading mode or a passive reading mode.

Specifically, when the first working mode is the active reading mode, the terminal should transmit a radio frequency field in the first direction through its NFC antenna; when the first working mode is the passive reading mode, the terminal should control its The NFC antenna does not emit a radio frequency field in the first direction, but only senses an external radio frequency field.

In the embodiment of the present invention, the NFC device can be detected by both the first direction and the second direction of the NFC antenna of the terminal, and specifying a specific direction corresponds to a specific working mode (such as the first direction corresponds to the first working mode), so that the detected As long as the detected NFC device approaches the terminal from a specific direction, it can directly enter the required working mode, thereby simplifying the operation and improving the user experience.

Optionally, as shown in Figure 4, may also include:

Step S44. When the NFC device comes from the second direction, communicate with the NFC device in a second working mode, which is different from the first working mode.

Optionally, the first working mode is an active reading mode, and the second working mode is a passive reading mode, and the detection NFC device includes:

The NFC device from the first direction is detected by transmitting a first NFC radio frequency signal to the first direction.

Optionally, stop detecting the NFC device from the first direction when stopping transmitting the first radio frequency signal to the first direction.

Specifically, for transmitting the first NFC radio frequency signal in the first direction, refer to the polling schematic diagram of this embodiment when detecting NFC devices as shown in Figure 5. In the right half figure, similar to the prior art, from the NFC Active stage Start to transmit the radio frequency field, and detect NFC devices such as NFC-A, NFC-B, NFC-F, other in turn, but it is different from entering the card simulation stage after finishing transmitting the radio frequency field in the prior art. In this embodiment, the terminal is in the Stop detecting the NFC device after finishing transmitting the radio frequency field, that is, "no work" in the figure (no longer working), thereby ensuring that when the detected NFC device approaches the terminal from the first direction, the terminal can only enter the active reading mode, And can reduce power consumption. Optionally, the polling intervals for detecting NFC devices such as NFC-A, NFC-B, NFC-F, and other above can be increased.

Optionally, the first working mode is an active reading mode, and the second working mode is a passive reading mode, and the detection NFC device includes:

The NFC device from the second direction is detected by sensing the second NFC radio frequency signal from the second direction.

Specifically, the sensing of the second NFC radio frequency signal from the second direction can refer to the polling schematic diagram of this embodiment when detecting NFC devices as shown in Figure 5. In the left half of the figure, different from the prior art, in the round There is no RF field emission phase in the interrogation cycle, only card emulation phase. Thus, it is ensured that when the detected NFC device approaches the terminal from the second direction, the terminal can only enter the passive reading mode.

The above-mentioned embodiments have introduced the near field communication method of the present invention, and the near field communication terminal will be described below through the embodiments.

Referring to FIG. 6, an embodiment of the present invention provides a near field communication terminal, including:

The NFC device detection unit 61 is used to detect the NFC device; there is no limit to the detected NFC device, it can be in the state of transmitting the radio frequency field, or the card simulation state;

NFC device direction judging unit 62, for when detecting this NFC device, judge that this NFC device comes from the first direction or the second direction of the NFC antenna of this terminal, and this first direction is different from this second direction; When NFC When the antenna is a coil, the first direction may be, for example, the front side of the coil, and the second direction may be the back side;

The first communication control unit 63 is configured to communicate with the NFC device in a first working mode when the NFC device comes from the first direction, and the first working mode is an active reading mode or a passive reading mode. Specifically, the active reading mode includes a peer-to-peer mode or a card reader mode, and the passive reading mode includes a card emulation mode.

In this embodiment, both the first direction and the second direction of the NFC antenna of the terminal can detect the NFC device, and specify a specific direction corresponding to a specific working mode (such as the first direction corresponding to the first working mode), so that the detected NFC As long as the device approaches the terminal from a specific direction, it can directly enter the required working mode, which simplifies operations and improves user experience.

Optionally, the near field communication terminal also includes:

The second communication control unit 64, when the NFC device comes from the second direction, communicates with the NFC device in a second working mode, which is different from the first working mode. Specifically, the second communication control unit and the first communication control unit are mutually exclusive, that is, they cannot work at the same time, and the terminal cannot communicate with two NFC devices at the same time.

Optionally, the first working mode is an active reading mode, the second working mode is a passive reading mode, and the NFC device detection unit includes:

The first NFC device detection subunit is configured to detect the NFC device from the first direction by transmitting a first NFC radio frequency signal to the first direction. The detected state of the NFC device is not limited, and may be a state of transmitting a radio frequency field or a card simulation state. Optionally, when stopping transmitting the first radio frequency signal to the first direction, the first NFC device detection subunit stops detecting the NFC device from the first direction.

Optionally, the first working mode is an active reading mode, the second working mode is a passive reading mode, and the NFC device detection unit includes:

The second NFC device detection subunit is configured to detect the NFC device from the second direction by sensing a second NFC radio frequency signal from the second direction. The NFC device to be detected should be in a state of emitting a radio frequency field in order to be detected.

The present invention will be further described below by taking a mobile phone as an example.

As shown in Figure 3, the embodiment of the present invention provides a mobile phone, including: at least one processor 31, memory 32 and NFC module 33, a processor is taken as an example in Figure 3, processor 31, memory 32 and NFC module 33 is connected through the bus 30, and the memory 32 stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor executes any one of the above-mentioned near field communication methods.

Specifically, the flow of instructions executed by the processor may be:

Detect NFC devices;

When the NFC device is detected, it is judged that the NFC device comes from the first direction or the second direction of the NFC antenna of the mobile phone, and the first direction is different from the second direction;

When the NFC device comes from the first direction, communicate with the NFC device in a first working mode, and the first working mode is an active reading mode or a passive reading mode.

Optionally, when the NFC device comes from the second direction, communicate with the NFC device in a second working mode, where the second working mode is different from the first working mode.

Optionally, the first working mode is an active reading mode, and the second working mode is a passive reading mode, and the detection NFC device includes:

The NFC device from the first direction is detected by transmitting a first NFC radio frequency signal to the first direction.

Optionally, the detection NFC device includes:

When stopping transmitting the first radio frequency signal to the first direction, stop detecting the NFC device from the first direction.

Optionally, the first working mode is an active reading mode, and the second working mode is a passive reading mode, and the detection NFC device includes:

The NFC device from the second direction is detected by sensing the second NFC radio frequency signal from the second direction.

An embodiment of the present invention also provides a non-transitory computer storage medium, the computer storage medium stores computer-executable instructions, and the computer-executable instructions can execute the near field communication method in any of the above method embodiments. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a flash memory (Flash Memory), a hard disk (Hard Disk Drive, abbreviation: HDD) or a solid-state drive (Solid-State Drive, SSD), etc.; the storage medium may also include a combination of the above types of memories.

Specifically, the process of the computer-executable instructions stored in the computer storage medium may include:

Detect NFC devices;

When the NFC device is detected, it is judged that the NFC device comes from the first direction or the second direction of the NFC antenna of the mobile phone, and the first direction is different from the second direction;

When the NFC device comes from the first direction, communicate with the NFC device in a first working mode, and the first working mode is an active reading mode or a passive reading mode.

Optionally, when the NFC device comes from the second direction, communicate with the NFC device in a second working mode, where the second working mode is different from the first working mode.

Optionally, the first working mode is an active reading mode, and the second working mode is a passive reading mode, and the detection NFC device includes:

The NFC device from the first direction is detected by transmitting a first NFC radio frequency signal to the first direction.

Optionally, the detection NFC device includes:

When stopping transmitting the first radio frequency signal to the first direction, stop detecting the NFC device from the first direction.

Optionally, the first working mode is an active reading mode, and the second working mode is a passive reading mode, and the detection NFC device includes:

The NFC device from the second direction is detected by sensing the second NFC radio frequency signal from the second direction.

Those skilled in the art can understand that all or part of the processes in the methods of the above-mentioned embodiments can be completed by instructing related hardware through computer programs, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), and the like.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall into the scope of the appended claims. within the limited range.

Claims (10)

1. A near-field communication method, characterized in that it is applied to a terminal, comprising: Detect NFC devices; When the NFC device is detected, it is judged that the NFC device comes from a first direction or a second direction of the NFC antenna of the terminal, and the first direction is different from the second direction; When the NFC device comes from the first direction, communicate with the NFC device in a first working mode, where the first working mode is an active reading mode or a passive reading mode. 2. The near field communication method according to claim 1, further comprising: When the NFC device comes from the second direction, communicate with the NFC device in a second working mode, the second working mode being different from the first working mode. 3. The near field communication method according to claim 2, wherein the first working mode is an active reading mode, the second working mode is a passive reading mode, and the detection of the NFC device includes: and detecting the NFC device from the first direction by transmitting a first NFC radio frequency signal in the first direction. 4. The near field communication method according to claim 3, wherein the detecting NFC device comprises: When stopping transmitting the first radio frequency signal to the first direction, stop detecting the NFC device from the first direction. 5. The near field communication method according to any one of claims 2-4, wherein the first working mode is an active reading mode, the second working mode is a passive reading mode, and the Detect NFC devices, including: The NFC device from the second direction is detected by sensing a second NFC radio frequency signal from the second direction. 6. A near field communication terminal, characterized in that it comprises: The NFC device detection unit is used to detect the NFC device; An NFC device direction judging unit, configured to judge that the NFC device comes from a first direction or a second direction of the NFC antenna of the terminal when the NFC device is detected, the first direction being different from the second direction; A first communication control unit, configured to communicate with the NFC device in a first working mode when the NFC device comes from the first direction, and the first working mode is active reading mode or passive reading model. 7. The near field communication terminal according to claim 6, further comprising: A second communication control unit, when the NFC device comes from the second direction, communicates with the NFC device in a second working mode, the second working mode being different from the first working mode. 8. The near field communication terminal according to claim 7, wherein the first working mode is an active reading mode, the second working mode is a passive reading mode, and the NFC device detection unit includes: The first NFC device detection subunit is configured to detect the NFC device from the first direction by transmitting a first NFC radio frequency signal to the first direction. 9. The near field communication terminal according to claim 8, wherein the first NFC device detection subunit is further configured to stop detecting the first radio frequency signal when stopping transmitting the first radio frequency signal to the first direction said NFC device from said first direction. 10. The near field communication terminal according to any one of claims 7-9, wherein the first working mode is an active reading mode, the second working mode is a passive reading mode, and the The NFC device detection unit includes: The second NFC device detection subunit is configured to detect the NFC device from the second direction by sensing a second NFC radio frequency signal from the second direction.