CN110958562A - Modulation mode selection method, near field communication device and storage medium - Google Patents
Modulation mode selection method, near field communication device and storage medium Download PDFInfo
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- H04W4/02—Services making use of location information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Abstract
The embodiment of the application provides a modulation mode selection method, a near field communication device and a storage medium, wherein the method comprises the following steps: acquiring current position information of the electronic equipment; determining the near field communication type of the electronic equipment according to the current position information; and determining a target modulation mode of the near field communication according to the near field communication type.
Description
Technical Field
The present application relates to the field of electronic applications, and in particular, to a modulation scheme selection method, a near field communication device, and a storage medium.
Background
Near Field Communication (NFC) is an emerging technology, and Near Field Communication devices using NFC technology can exchange data while being close to each other. The NFC works on the principle that after receiving the field intensity sent by the Reader, the NFC near field communication device superposes response information on the field intensity to form a load modulation signal, and the load modulation signal is sent back to the Reader. When the NFC near field communication device generates the Modulation signal, an Active Load Modulation (ALM) or Passive Load Modulation (PLM) method may be adopted.
At present, the NFC device may determine whether to use ALM or PLM according to the magnitude of the received field intensity, which may increase the communication duration, resulting in low efficiency of near field communication.
Disclosure of Invention
The embodiment of the application provides a modulation mode selection method, a near field communication device and a storage medium, which can reduce communication time and improve near field communication efficiency.
The technical scheme of the application is realized as follows:
the embodiment of the application provides a modulation mode selection method for near field communication, which comprises the following steps:
acquiring current position information of the electronic equipment;
determining the near field communication type of the electronic equipment according to the current position information;
and determining a target modulation mode of the near field communication according to the near field communication type.
An embodiment of the present application provides a near field communication device, including:
the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring the current position information of the electronic equipment; determining the near field communication type of the electronic equipment according to the current position information;
and the determining unit is used for determining a target modulation mode of the near field communication according to the near field communication type.
An embodiment of the present application provides an electronic device, which includes: the system comprises a processor, a memory and a communication bus, wherein the processor is connected with the memory through the communication bus, and the memory is used for storing program instructions; the processor is configured to execute the program instructions to implement the method as described in any one of the above.
The present application provides a storage medium, on which a computer program is stored, for use in a near field communication device, where the computer program, when executed by a processor, implements the method as described in any one of the above.
The embodiment of the application provides a modulation mode selection method, a near field communication device and a storage medium, wherein the method comprises the following steps: acquiring current position information of the electronic equipment; determining the near field communication type of the electronic equipment according to the current position information; and determining a target modulation mode of the near field communication according to the near field communication type. By adopting the method, the near field communication device sets the preset modulation mode according to the position information, so that the preset modulation mode can be suitable for a local Reader, the transaction switching times can be reduced, the communication time is shortened, and the near field communication efficiency is further improved.
Drawings
Fig. 1 is a flowchart of a modulation scheme selection method according to an embodiment of the present application;
fig. 2 is a schematic flowchart illustrating a preset modulation scheme set by an exemplary near field communication apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart illustrating an exemplary near field communication device determining a target modulation scheme according to a polling command type according to an embodiment of the present application;
fig. 4 is a first schematic structural diagram of a near field communication device according to an embodiment of the present disclosure;
fig. 5 is a second schematic structural diagram of a near field communication device according to an embodiment of the present application.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application. And are not intended to limit the present application.
The NFC near field communication device can generate a modulation signal by adopting an ALM or a PLM, wherein the PLM performs switching modulation on a carrier signal of the Reader, the energy of the PLM comes from field intensity coupled with the Reader, and the NFC near field communication device does not provide energy; and the ALM generates energy through a power supply of the ALM to form a load modulation signal after receiving the carrier signal of the Reader, and sends the load modulation signal to the Reader.
Because the PLM completely adopts the signal energy of the Reader to carry out communication, the response signal returned by the NFC near field communication device is completely synchronous with the sending signal of the Reader, and the Reader cannot be saturated in receiving due to overlarge energy; however, when the communication distance is long, the load modulation signal is weak, resulting in an increased probability of communication failure.
The ALM can reach relatively long communication distance because the output energy is relatively strong; however, the Reader is saturated due to too strong energy, and the signal generated by the ALM is difficult to be completely synchronized with the signal transmitted by the Reader, so that a phase difference exists.
At present, when ALM or PLM is judged to be used by using the received field intensity, when two readers are same, one is of a type TypeA and the other is of a type TypeF, the same modulation mode (ALM or PLM) can be selected when the field intensities sent by the two readers are the same, different parameters of continuous trial and error can be caused, the transaction time is overlong, and when the longest transaction time limit set by the readers is exceeded, the transaction failure can be even caused. Therefore, the following technical scheme of the embodiment of the application is provided.
Example one
An embodiment of the present application provides a modulation scheme selection method, which may include, as shown in fig. 1:
s101, obtaining current position information of the electronic equipment.
The modulation mode selection method provided by the embodiment of the application is suitable for a scene that the near field communication device provided with the NFC chip performs near field communication with the Reader.
In the embodiment of the present application, an NFC chip is disposed on the NFC device, and at this time, the NFC device has a NFC function, and the NFC device herein may be any device having functions of NFC and storage, for example: the mobile terminal comprises a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, a vehicle-mounted device, a network television, a wearable device and other devices, which are specifically selected according to actual conditions, and the embodiment of the application is not specifically limited.
In the embodiment of the application, when the near field communication device starts the NFC card simulation function, the near field communication device carries out near field communication with the Reader, at the moment, the near field communication device receives the field intensity of the Reader, the NFC chip of the near field communication device generates a field on event to be reported to the main CPU so as to inform the main CPU of the near field communication request of the Reader, and at the moment, the near field communication device searches whether a preset modulation mode is preset.
S102, determining the near field communication type of the electronic equipment according to the current position information.
After the near field communication device acquires the current position information of the electronic equipment, the near field communication device determines the near field communication type of the electronic equipment according to the current position information.
In the embodiment of the application, the near field communication device searches a target near field communication type corresponding to the current position information in a preset mapping relation according to the current position information; the preset mapping relation is used for establishing a corresponding relation between the current position information and at least one target near field communication type; and then, the near field communication device determines the near field communication type of the electronic equipment according to the target near field communication type corresponding to the current position information.
In an embodiment, if the current location information only corresponds to one target nfc type, the nfc device determines that the target nfc type is a nfc type of the electronic device.
In another embodiment, if the current location information corresponds to a plurality of target nfc types, the nfc device determines, from the plurality of target nfc types, a nfc type of the electronic device in sequence according to a plurality of polling instruction types sent by the reader, where each polling instruction type corresponds to one target nfc type.
Specifically, the near field communication device searches for a first target near field communication type corresponding to a first polling instruction type in a plurality of polling instruction types, wherein the polling instruction is sent to the NFC chip by the Reader; then, the near field communication device carries out pre-transaction processing based on the first target near field communication type; when a preprocessing result of the pre-transaction processing is obtained, the near field communication device determines a first target near field communication type as a near field communication type of the electronic equipment; and when the preprocessing result of the pre-transaction processing is not obtained, the near field communication device continues to determine a second target near field communication type according to a second polling instruction type in the plurality of polling instruction types in the next round so as to judge whether the second target near field communication type is determined as the target technical standard or not, wherein the second target near field communication type is a target near field communication type corresponding to the second polling instruction type in the plurality of target near field communication types.
Illustratively, the near field communication device distinguishes three target near field communication types of type a, type b and type f according to a Polling instruction (Polling instruction) sent by the Reader, wherein the SENSF _ REQ is the Polling instruction corresponding to type f when GTfWhen the instruction is received after the TypeF protection time, the near field communication device determines the transaction based on the TypeF target near field communication type; SENS _ REQ is a Polling instruction corresponding to TypeA, when GT is presentaWhen the instruction is received after the TypeA protection time, the near field communication device determines the transaction based on the TypeA target near field communication type; SENSB _ REQ is a Polling instruction corresponding to TypeB, when GT isbWhen the instruction is received after the type b protection time, the near field communication device determines that the transaction is performed based on the type b target near field communication type.
It should be noted that, after the near field communication device determines each target near field communication type, the near field communication device performs pre-transaction processing based on the target near field communication type, and when the pre-transaction processing is completed to obtain a corresponding pre-processing result, the near field communication device represents that the target near field communication type can complete a near field communication function with the Reader, and at this time, the near field communication device determines a modulation mode corresponding to the target near field communication type as a target modulation mode; when the pre-transaction processing is not finished, the near field communication function between the target near field communication type and the Reader cannot be finished, at the moment, the near field communication device receives the next Polling instruction of the Reader, and the next round of process for determining the target near field communication type and the target modulation mode is carried out.
Further, when the near field communication device does not find the target near field communication type corresponding to the current position information from the preset mapping relationship, the near field communication device determines the near field communication type corresponding to the current position information by adopting a preset polling mode; and updating the near field communication type corresponding to the current position information into a preset mapping relation.
Illustratively, the area a supports both TypeA and TypeF, and when the mobile phone moves to the area a, the mobile phone may select ALM or PLM as the preset modulation mode; the region B supports TypeF, and when the mobile phone moves to the region B, the mobile phone can select PLM as a preset modulation mode; if the technical standard adopted by the area C is not in the corresponding relationship between the preset position and the technical standard, the mobile phone does not set the preset modulation mode when the mobile phone moves to the area C.
For example, after the location of the NFC device is changed by a country or a region, the NFC device checks a Type f index table (a corresponding relationship between a preset location and a technical standard), and when the country or the region to which the changed location belongs is in the Type index table, the AP issues a command for switching the default indication to the PLM to the NFC chip.
Exemplarily, as shown in fig. 2, a method flow for setting a preset modulation mode for a near field communication device specifically includes:
1. the near field communication device acquires current position information;
2. the near field communication device reads the index table from the TypeF country and searches for the technical standard corresponding to the current position information;
3. the near field communication device judges whether the technical standard corresponding to the current position information is TypeF;
4. when the technical standard corresponding to the current position information is TypeF, the near field communication device sets the default mode as PLM;
5. and when the technical standard corresponding to the current position information is not TypeF, setting the default system as ALM by the near field communication device.
S103, determining a target modulation mode of the near field communication according to the near field communication type.
And when the near field communication device determines the near field communication type of the electronic equipment according to the current position information, the near field communication device determines the target modulation mode of the near field communication according to the near field communication type.
Optionally, when the target near field communication Type is Type F, it is determined that the target modulation mode of the near field communication is passive load modulation PLM.
Optionally, the target near field communication type includes type a, type b, type f, and the like, which is specifically selected according to an actual situation, and the embodiment of the present application is not specifically limited. The target modulation modes corresponding to the TypeA and the TypeB are ALM, and the target modulation mode corresponding to the TypeF is PLM.
Further, after the near field communication device determines a target modulation mode of the near field communication, the near field communication device generates a load modulation signal by using the target modulation mode and the field strength information to realize the near field communication with the Reader based on the load modulation signal.
Exemplarily, as shown in fig. 3, a method flow for determining a target modulation mode according to a Polling instruction sent by a Reader by a near field communication device specifically includes:
1. the near Field communication device receives a Field on event reported by the NFC chip;
2. the near field communication device sequentially receives Polling instructions of the Reader;
3. the near field communication device judges whether the type of the Polling instruction is SENS _ REQ;
4. when the type of the Polling instruction is SENS _ REQ, executing step 11;
5. when the type of the Polling instruction is not SENS _ REQ, the near field communication device judges whether the type of the Polling instruction is SENSB _ REQ or not;
6. when the type of the Polling instruction is SENSB _ REQ, executing step 11;
7. when the type of the Polling instruction is not SENSB _ REQ, the near field communication device judges whether the type of the Polling instruction is SENSF _ REQ;
8. when the type of the Polling instruction is SENSF _ REQ, executing step 10;
9. when the type of the Polling instruction is not SENSF _ REQ, executing step 11;
10. performing transaction in a PLM mode;
11. and performing transaction by adopting an ALM mode.
It can be understood that the near field communication device sets a preset modulation mode according to the position information, so that the preset modulation mode can be suitable for a local Reader, transaction switching times can be reduced, transaction speed is increased, and the intelligence of near field communication is improved; furthermore, when the number of the preset modulation modes is multiple, the near field communication device selects the target modulation mode according to the polling instruction type, so that the intelligence of the near field communication can be improved.
Example two
An embodiment of the present application provides a near field communication device 1, and as shown in fig. 4, the near field communication device 1 may include:
an obtaining unit 10, configured to obtain current location information of an electronic device;
a determining unit 11, configured to determine a near field communication type of the electronic device according to the current location information; and determining a target modulation mode of the near field communication according to the near field communication type.
Optionally, the near field communication device 1 further includes: a search unit;
the searching unit is used for searching a target near field communication type corresponding to the current position information in a preset mapping relation according to the current position information; the preset mapping relation is used for establishing a corresponding relation between the current position information and at least one target near field communication type;
the determining unit 11 is further configured to determine a near field communication type of the electronic device according to a target near field communication type corresponding to the current location information.
Optionally, if the current location information only corresponds to one target near field communication type, the determining unit 11 is further configured to determine that the target near field communication type is the near field communication type of the electronic device.
Optionally, the target near field communication Type is Type F, and the determining unit 11 is further configured to determine that the target modulation mode of the near field communication is passive load modulation PLM.
Optionally, if the current location information corresponds to a plurality of target near field communication types,
the determining unit 11 is further configured to determine, according to a plurality of polling instruction types sent by the reader in sequence, a near field communication type of the electronic device from the plurality of target near field communication types, where each polling instruction type corresponds to one target near field communication type.
Optionally, the near field communication apparatus further includes: a pre-transaction unit;
the searching unit is further configured to search for a first target near field communication type corresponding to a first polling instruction type in the multiple polling instruction types;
the pre-transaction unit is used for performing pre-transaction processing based on the first target near field communication type;
the determining unit 11 is further configured to determine the first target near field communication type as a near field communication type of the electronic device when a preprocessing result of the pre-transaction processing is obtained; and when the preprocessing result of the pre-transaction processing is not obtained, continuing to determine a second target near field communication type according to a second polling instruction type in the plurality of polling instruction types in the next round so as to judge whether the second target near field communication type is determined as the target technical standard, wherein the second target near field communication type is a target near field communication type corresponding to the second polling instruction type in the plurality of target near field communication types.
Optionally, the near field communication apparatus further includes: an update unit;
the searching unit is further configured to determine, when the target near field communication type corresponding to the current location information is not searched from the preset mapping relationship, the near field communication type corresponding to the current location information by using a preset polling manner;
the updating unit is configured to update the near field communication type corresponding to the current location information into the preset mapping relationship.
The near field communication device provided by the embodiment of the application acquires the current position information of the electronic equipment; determining the near field communication type of the electronic equipment according to the current position information; and determining a target modulation mode of the near field communication according to the near field communication type. Therefore, according to the near field communication device provided by the embodiment, the near field communication device sets the preset modulation mode according to the position information, and therefore the preset modulation mode can be suitable for a local Reader, transaction switching times can be reduced, communication time is shortened, and the near field communication efficiency is further improved.
Fig. 5 is a schematic diagram of a composition structure of an electronic device according to an embodiment of the present application, and in practical applications, based on the same disclosure concept of the foregoing embodiment, as shown in fig. 5, the electronic device according to the present embodiment includes: a processor 12, a memory 13, and a communication bus 14.
In a Specific embodiment, the obtaining unit 10, the determining unit 11, the searching unit, the pre-transaction unit and the updating unit may be implemented by a Processor 12 located on an electronic Device, and the Processor 12 may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing (DSPD), a Programmable Logic image partitioning Device (PLD), a Field Programmable Gate Array (FPGA), a CPU, a controller, a microcontroller and a microprocessor. It is understood that the electronic device for implementing the above-mentioned processor function may be other devices, and the embodiment is not limited in particular.
In the embodiment of the present application, the communication bus 14 is used for realizing connection communication between the processor 12 and the memory 13; the processor 12 implements the modulation scheme selection method according to the first embodiment when executing the running program stored in the memory 13.
The present application provides a storage medium, on which a computer program is stored, where the computer readable storage medium stores one or more programs, and the one or more programs are executable by one or more processors and applied to a near field communication device, and the computer program implements the modulation scheme selection method according to the first embodiment.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.
Claims (10)
1. A modulation scheme selection method for near field communication, the method comprising:
acquiring current position information of the electronic equipment;
determining the near field communication type of the electronic equipment according to the current position information;
and determining a target modulation mode of the near field communication according to the near field communication type.
2. The method of claim 1, wherein determining the near field communication type of the electronic device according to the current location information comprises:
searching a target near field communication type corresponding to the current position information in a preset mapping relation according to the current position information; the preset mapping relation is used for establishing a corresponding relation between the current position information and at least one target near field communication type;
and determining the near field communication type of the electronic equipment according to the target near field communication type corresponding to the current position information.
3. The method of claim 2, wherein if the current location information only corresponds to one target near field communication type, the determining the near field communication type of the electronic device according to the target near field communication type corresponding to the current location information comprises:
and determining the target near field communication type as the near field communication type of the electronic equipment.
4. The method of claim 3, wherein if the target near field communication Type is Type F, the determining a target modulation scheme of near field communication according to the near field communication Type includes:
and determining that the target modulation mode of the near field communication is Passive Load Modulation (PLM).
5. The method of claim 2, wherein if the current location information corresponds to a plurality of target near field communication types, determining the near field communication type of the electronic device according to the target near field communication type corresponding to the current location information comprises:
and determining the near field communication type of the electronic equipment from the target near field communication types according to a plurality of polling instruction types sent by the reader in sequence, wherein each polling instruction type corresponds to one target near field communication type.
6. The method of claim 5, wherein the determining the near field communication type of the electronic device from the plurality of target near field communication types according to a plurality of polling instruction types sent by the reader in sequence comprises:
searching a first target near field communication type corresponding to a first polling instruction type in the plurality of polling instruction types;
performing pre-transaction processing based on the first target near-field communication type;
when a preprocessing result of the pre-transaction processing is obtained, determining the first target near field communication type as the near field communication type of the electronic equipment;
and when the preprocessing result of the pre-transaction processing is not obtained, continuing to determine a second target near field communication type according to a second polling instruction type in the plurality of polling instruction types in the next round so as to judge whether the second target near field communication type is determined as the target technical standard, wherein the second target near field communication type is a target near field communication type corresponding to the second polling instruction type in the plurality of target near field communication types.
7. The method according to claim 1, wherein after searching for a target near field communication type corresponding to the current location information in a preset mapping relationship according to the current location information, the method further comprises:
when the target near field communication type corresponding to the current position information is not found in the preset mapping relation, determining the near field communication type corresponding to the current position information by adopting a preset polling mode;
and updating the near field communication type corresponding to the current position information into the preset mapping relation.
8. A near field communication device, characterized in that the near field communication device comprises:
the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring the current position information of the electronic equipment; determining the near field communication type of the electronic equipment according to the current position information;
and the determining unit is used for determining a target modulation mode of the near field communication according to the near field communication type.
9. An electronic device, characterized in that the electronic device comprises: the system comprises a processor, a memory and a communication bus, wherein the processor is connected with the memory through the communication bus, and the memory is used for storing program instructions; the processor is configured to execute the program instructions to implement the method of any one of claims 1-8.
10. A storage medium having stored thereon a computer program for use in a near field communication device, characterized in that the computer program, when being executed by a processor, is adapted to carry out the method of any of claims 1-8.
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| CN110958562B (en) | 2021-07-16 |
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