CN105554867A - Method and system for improving stability of NFC communication - Google Patents
Method and system for improving stability of NFC communication Download PDFInfo
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- CN105554867A CN105554867A CN201510998951.7A CN201510998951A CN105554867A CN 105554867 A CN105554867 A CN 105554867A CN 201510998951 A CN201510998951 A CN 201510998951A CN 105554867 A CN105554867 A CN 105554867A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
- H04W52/283—Power depending on the position of the mobile
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Abstract
The invention relates to a method and system for improving the stability of NFC communication. The method comprises the following steps: judging whether NFC equipment is in an active mode or not when the NFC equipment performs NFC communication; if so, obtaining the distance between the NFC equipment and NFC target equipment; and adjusting the radio-frequency field power of the NFC equipment according to the distance. According to the invention, the distance between the NFC equipment and the NFC target equipment can be detected in the manners, such as a laser ranging manner; when the NFC equipment works in the active mode, the radio-frequency field power of the NFC equipment is adjusted according to the distance; therefore, the stability of NFC communication can be ensured; and the user experience is improved.
Description
Technical field
The present invention relates to NFC communication technical field, particularly relate to a kind of method and system improving NFC communication stability.
Background technology
Near-field communication (NearFieldCommunication, NFC) is a kind of radiotechnics of short distance high frequency, and its transmission data speed has 106kbps, 212kbps and 424kbps tri-kinds.Current NFC has become ISO/IECIS18092 international standard, ECMA-340 standard and ETSITS102190 standard.
NFC technology is developed by non-contact radio-frequency identification (RFID) and the Technology Integration that interconnects.Support that the equipment (being called NFC device) of NFC can at swap data initiatively or under Passive Mode.In the passive mode, start the equipment of NFC communication, also referred to as NFC initiating equipment (main equipment), radiofrequency field (RF-field) is provided in whole communication process, it can select 106kbps, 212kbps or 424kbps wherein a kind of transmission speed, data is sent to another equipment.This another equipment is called NFC target device (from equipment), need not produce radiofrequency field, and working load modulation (loadmodulation) technology, namely identical speed can pass data back initiating equipment.This communication mechanism is compatible with the contact type intelligent card based on ISO14443A, MIFARE and FeliCa, therefore, NFC initiating equipment in the passive mode, can to connect and initialization procedure detects contact type intelligent card or NFC target device with identical, and set up contact with it.
At present, along with popularizing of the mobile terminal such as mobile phone, flat board, the NFC system that energy consumption is low, data transmission bauds is fast is widely used in fields such as mobile payment, electronic identity authentication, electronic ticket, but NFC is as a kind of short-range technologies, its communication distance is very limited, when two NFC device are distant, communication efficiency is poor, very unstable.
Summary of the invention
Based on this, for solving the problems of the prior art, the invention provides a kind of method and system improving NFC communication stability, can automatically adjust radiofrequency field power according to the distance of two NFC device, to improve the stability of NFC communication.
For achieving the above object, the embodiment of the present invention is by the following technical solutions:
Improve a method for NFC communication stability, comprise the steps:
When NFC device and NFC target device carry out NFC communication, judge whether described NFC device has the initiative pattern:
If so, the distance between described NFC device and described NFC target device is then obtained;
According to the radiofrequency field power of the described NFC device of described distance adjustment.
Improve a system for NFC communication stability, comprising:
Mode decision module, for when NFC device and NFC target device carry out NFC communication, judges whether described NFC device has the initiative pattern:
Distance acquisition module, for obtaining the distance between described NFC device and described NFC target device when described NFC device has the initiative pattern;
Radiofrequency field power regulation module, for the radiofrequency field power according to the described NFC device of described distance adjustment.
The present invention detects the distance of NFC device and NFC target device by modes such as laser rangings, when NFC device works in the active mode, according to this distance, its radiofrequency field power is adjusted, the radiofrequency field power of NFC device is such as suitably increased when this distance increases, to ensure the stability communicated between its with NFC target device, and then improve Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of method in embodiment one of raising NFC communication stability of the present invention;
Fig. 2 is the method flow schematic diagram of the distance obtained in the embodiment of the present invention one between NFC device and NFC target device;
Fig. 3 is the schematic flow sheet of method in embodiment two of raising NFC communication stability of the present invention;
Fig. 4 is the schematic flow sheet of method in embodiment three of raising NFC communication stability of the present invention;
Fig. 5 is the system structural representation in one embodiment of raising NFC communication stability of the present invention;
Fig. 6 is the structural representation of radiofrequency field power regulation module of the present invention in a kind of Alternate embodiments;
Fig. 7 is the structural representation of radiofrequency field power regulation module of the present invention in another kind of Alternate embodiments.
Embodiment
Below in conjunction with preferred embodiment and accompanying drawing, content of the present invention is described in further detail.Obviously, hereafter described embodiment is only for explaining the present invention, but not limitation of the invention.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.Should be noted that, the NFC device described in the embodiment of the present invention can comprise: the PDA (PersonalDigitalAssistant possessing NFC module, personal digital assistant), mobile phone, panel computer etc., above-mentioned NFC device is only citing, and non exhaustive, including but not limited to above-mentioned NFC device.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.
Fig. 1 is the schematic flow sheet of method in embodiment one of raising NFC communication stability of the present invention, and the executive agent of the method for the raising NFC communication stability of the present embodiment can be the control system of NFC device, the operating system of such as mobile phone.As shown in Figure 1, the method for the raising NFC communication stability in the present embodiment comprises the following steps:
Step S110, when NFC device and NFC target device carry out NFC communication, judges whether described NFC device has the initiative pattern; If so, then step S120 is entered;
Step S120, obtains the distance between described NFC device and NFC target device, enters step S130
Step S130, according to the radiofrequency field power of the described NFC device of described distance adjustment.
NFC device has two kinds of mode of operations, and one is aggressive mode, and when NFC device communicates with NFC target device in this mode, this NFC device needs to provide radiofrequency field; Another kind is Passive Mode, and under this pattern, NFC device then need not produce radiofrequency field.In part document, NFC device is also defined as possessing three kinds of mode of operations, in this definition except above-mentioned two kinds of patterns, also there is two-way mode, now NFC device and NFC target device all initiatively send radiofrequency field to set up point-to-point communication, but in fact now NFC device and NFC target device are all operated in aggressive mode, therefore a kind of definition mode before adopting in this application, namely whether provide radiofrequency field that its mode of operation is divided into aggressive mode and Passive Mode according to NFC device.
NFC device open NFC module and NFC target device carry out NFC communication time, the control system of NFC device first judges whether NFC device has the initiative pattern.If NFC device is in Passive Mode, because it does not produce radiofrequency field, therefore without the need to carrying out the adjustment of the long power of radio frequency, the pattern if NFC device has the initiative, it need provide radiofrequency field when carrying out NFC communication, once excessive with the distance of NFC target device, affect NFC communication effect, therefore the distance that need obtain when NFC device has the initiative pattern in the present embodiment between NFC device and NFC target device, and the radiofrequency field power of NFC device is adjusted according to this distance, such as, when detecting that the distance between NFC device and NFC target device increases, increase the radiofrequency field power of NFC device, to improve the stability of NFC communication, improve Consumer's Experience.
At present, laser ranging system is widely used on various terminal equipment, and laser ranging system utilizes laser to carry out the device of Accurate Determining to the distance of target.Laser ranging system operationally penetrates a branch of very thin laser to target, the laser beam reflected by photoelectric cell receiving target, then measures laser beam from the time being transmitted into reception by timer, thus calculates the distance to target.In view of the extensive use of laser ranging system, therefore in the optional execution mode of one, when NFC device is configured with laser ranging system, the distance between this laser ranging system acquisition NFC device and NFC target device can be utilized, as shown in Figure 2, specifically comprise the steps:
Step S121, when described NFC device has the initiative pattern, sends enabled instruction, opens the laser ranging system of described NFC device;
Step S122, receives the distance between described NFC device and NFC target device that described laser ranging system reports.
When NFC device and NFC target device carry out NFC communication, if the control system judgement NFC device of NFC device has the initiative during pattern, send enabled instruction, open the laser ranging system of NFC device.This distance by the distance between laser Accurate Determining NFC device and NFC target device, and is reported to the control system of NFC device after starting by laser ranging system.After the data that NFC device reception laser ranging system reports, namely obtain the distance between NFC device and NFC target device, then adjust, to maintain the stability of NFC communication according to the radiofrequency field power of this distance to NFC device.
In addition, laser ranging system as continued through NFC device detects the distance of NFC device and NFC target device, then can increase the power consumption of NFC device, therefore, in the optional execution mode of one, after the control system of NFC device receives the distance between the NFC device that reports of laser ranging system and NFC target device, if detect, NFC device is in Passive Mode and/or NFC communication stops, then the control system of NFC device sends halt instruction, close the laser ranging system of NFC device, to reduce the power consumption of NFC device, prolongs standby time.
Fig. 3 is the schematic flow sheet of method in embodiment two of raising NFC communication stability of the present invention, and the executive agent of the method for the raising NFC communication stability of the present embodiment two can be the control system of NFC device.As shown in Figure 3, the method for the raising NFC communication stability in the present embodiment two comprises the following steps:
Step S210, when NFC device carries out NFC communication, judges whether described NFC device has the initiative pattern; If so, then step S220 is entered;
Step S220, obtains the distance between described NFC device and NFC target device, enters step S230;
Step S230, judges whether the described distance of current time is greater than the described distance in a moment, if so, then enters step S240; If not, then step S250 is entered;
Step S240, increases the radiofrequency field power of described NFC device;
Step S250, judges whether the described distance of current time is less than the described distance in a moment, if so, then enters step S260, if not, then enters step S270;
Step S260, reduces the radiofrequency field power of described NFC device;
Step S270, keeps the radiofrequency field power of described NFC device constant.
Originally be that embodiment two is with the difference of embodiment one: in the present embodiment two NFC device carry out NFC communication with NFC target device and have the initiative pattern time, if the distance between itself and NFC target device increases, then increase its radiofrequency field power; If the distance between itself and NFC target device reduces, then reduce its radiofrequency field power.
Concrete, when NFC device works in the active mode, need to send radiofrequency field and carry out NFC communication with NFC target device.Now, NFC device detects distance l (can periodically detect this distance l) between itself and NFC target device by the range unit of its laser ranging system configured or other type.If in the process of NFC communication, the control system of NFC device judges that the distance l between current time NFC device and NFC target device is greater than the distance l in a moment, then illustrate that the distance between NFC device and NFC target device increases, for ensureing the stability of NFC communication, now can increase the radiofrequency field power of NFC device, improve Consumer's Experience; If the control system of NFC device judges that the distance l of current time is less than the distance l in a moment, then illustrate that the distance between NFC device and NFC target device reduces, now suitably can reduce the radiofrequency field power of NFC device, the stability of NFC communication can be maintained, do not affect Consumer's Experience, the power consumption of NFC device can be reduced again, extend its standby working time.
Above-mentioned step S230, step step S250 judge the variation tendency of the distance between NFC device and NFC target device; even if the sequencing judged changes; also technique effect of the present invention can not be affected; therefore; only judge that order illustrates technical scheme of the present invention for above-mentioned in the present embodiment two, but can not judge that order limits protection scope of the present invention with this.
Fig. 4 is the schematic flow sheet of method in embodiment three of raising NFC communication stability of the present invention, and the executive agent of the method for the raising NFC communication stability of the present embodiment three can be the control system of NFC device.As shown in Figure 4, the method for the raising NFC communication stability in the present embodiment three comprises the following steps:
Step S310, when NFC device carries out NFC communication, judges whether described NFC device has the initiative pattern; If so, then step S320 is entered;
Step S320, obtains the distance between described NFC device and NFC target device, enters step S330;
Step S330, judges whether described distance is greater than threshold value, if so, then enters step S340; If not, then step S350 is entered;
Step S340, increases the radiofrequency field power of described NFC device;
Step S350, keeps the radiofrequency field power of described NFC device constant.
Originally be that embodiment three is with the difference of embodiment one: in the present embodiment three NFC device carry out NFC communication with NFC target device and have the initiative pattern time, if the distance between itself and NFC target device is greater than the threshold value preset, then increase its radiofrequency field power; If the distance between itself and NFC target device is less than or equal to this threshold value, then keep its radiofrequency field power constant.
Concrete, above-mentioned threshold value sets according to the effective communication range of NFC device, when NFC device works in the active mode, needs to send radiofrequency field and carries out NFC communication with NFC target device.Now, NFC device detects the distance l between itself and NFC target device by the range unit of its laser ranging system configured or other type, if in the process of NFC communication, if the control system of NFC device judges that the distance l of current time is less than or equal to threshold value D, then illustrate that current NFC target device is in the effective communication range of NFC device, now need not adjust the radiofrequency field power of NFC device; If the control system of NFC device judges that the distance l between current time NFC device and NFC target device is greater than the threshold value D preset, then illustrate that the distance between NFC device and NFC target device is excessive, now can increase the radiofrequency field power of NFC device, to ensure the stability of NFC communication.Wherein, when increasing the radiofrequency field power of NFC device or reducing the radiofrequency field power of NFC device, can carry out according to the increasing or decreasing mode pre-set, such as, the percentage increased according to distance l increases the radiofrequency field power of NFC device, if distance l increases a%, then the radiofrequency field power of NFC device is increased a%; In like manner, the percentage that also can reduce according to distance l reduces the radiofrequency field power of NFC device.
In sum, the method of raising NFC communication stability of the present invention detects the distance of NFC device and NFC target device by modes such as laser rangings, when NFC device works in the active mode, can adjust its radiofrequency field power according to this distance, to ensure the stability of NFC communication, improve Consumer's Experience.In addition, when NFC device works in Passive Mode or NFC communication stops, the laser ranging system of closing NFC device can be controlled, to reduce the power consumption of NFC device, prolongs standby time.
According to the method for the raising NFC communication stability of the invention described above, the present invention also provides a kind of system improving NFC communication stability, and below in conjunction with accompanying drawing and preferred embodiment, the system to raising NFC communication stability of the present invention is described in detail.
Fig. 5 is the system structural representation in one embodiment of raising NFC communication stability of the present invention.As shown in Figure 5, the method system of the raising NFC communication stability in this embodiment comprises:
Mode decision module 10, for when NFC device and NFC target device carry out NFC communication, judges whether described NFC device has the initiative pattern:
Distance acquisition module 20, for obtaining the distance between described NFC device and NFC target device when described NFC device has the initiative pattern;
Radiofrequency field power regulation module 30, for the radiofrequency field power according to the described NFC device of described distance adjustment.
NFC device open NFC module and NFC target device carry out NFC communication time, mode decision module 10 first judges whether NFC device has the initiative pattern.If NFC device is in Passive Mode, because it does not produce radiofrequency field, therefore without the need to carrying out the adjustment of the long power of radio frequency, the pattern if NFC device has the initiative, it need provide radiofrequency field when carrying out NFC communication, once excessive with the distance of NFC target device, affect NFC communication effect, therefore the distance between NFC device and NFC target device need be obtained when NFC device has the initiative pattern by distance acquisition module 20 in the present embodiment, radiofrequency field power regulation module 30 is according to the radiofrequency field power of this distance adjustment NFC device, such as, when detecting that the distance between NFC device and NFC target device increases, radiofrequency field power regulation module 30 increases the radiofrequency field power of NFC device, to improve the stability of NFC communication, improve Consumer's Experience
In the optional execution mode of one, as shown in Figure 5, distance acquisition module 20 comprises:
Opening module 201, for when described NFC device has the initiative pattern, sends enabled instruction, opens the laser ranging system of described NFC device;
Receiver module 202, for receiving the distance between described NFC device and NFC target device that described laser ranging system reports.
Wherein, laser ranging system utilizes laser to carry out the device of Accurate Determining to the distance of target.Laser ranging system operationally penetrates a branch of very thin laser to target, the laser beam reflected by photoelectric cell receiving target, then measures laser beam from the time being transmitted into reception by timer, thus calculates the distance to target.In view of laser ranging system has been widely used on various terminal equipment, therefore in the optional execution mode of one, when NFC device is configured with laser ranging system, the distance between this laser ranging system acquisition NFC device and NFC target device can be utilized, concrete, when NFC device carries out NFC communication, to have the initiative pattern if mode decision module 10 judges NFC device, then opening module 201 sends enabled instruction, opens the laser ranging system of NFC device.This distance by the distance between laser Accurate Determining NFC device and NFC target device, and is reported to the control system of NFC device after starting by laser ranging system.After receiver module 202 receives the data that laser ranging system reports, namely the distance between NFC device and NFC target device is obtained, then radiofrequency field power regulation module 30 adjusts according to the radiofrequency field power of this distance to NFC device, to maintain the stability of NFC communication.
In addition, the laser ranging system as continued through NFC device detects the distance of NFC device and NFC target device, then can increase the power consumption of NFC device, and therefore, in the optional execution mode of one, as shown in Figure 5, distance acquisition module 20 also comprises:
Closing module 203, during for being in Passive Mode in described NFC device and/or stopping NFC communication, sends halt instruction, closes the laser ranging system of described NFC device.
After the control system of NFC device receives the distance between the NFC device that reports of laser ranging system and NFC target device, if detect, NFC device is in Passive Mode and/or NFC communication stops, then closing module 203 sends halt instruction, close the laser ranging system of NFC device, to reduce the power consumption of NFC device, prolongs standby time.
In the optional execution mode of one, as shown in Figure 6, radiofrequency field power regulation module 30 comprises:
Power increases module 311, for when the described distance of current time is greater than the described distance in a moment, increases the radiofrequency field power of described NFC device;
Power reduction module 312, for when the described distance of current time is less than the described distance in a moment, reduces the radiofrequency field power of described NFC device.
When NFC device works in the active mode, need to send radiofrequency field and carry out NFC communication with NFC target device.Now, NFC device detects distance l (can periodically detect this distance l) between itself and NFC target device by the range unit of its laser ranging system configured or other type.If in the process of NFC communication, if the distance l between current time NFC device and NFC target device is greater than the distance l in a moment, then illustrate that the distance between NFC device and NFC target device increases, for ensureing the stability of NFC communication, now power increases the radiofrequency field power that module 311 suitably increases NFC device, improves Consumer's Experience; If the distance l of current time is less than the distance l in a moment, then illustrate that the distance between NFC device and NFC target device reduces, now power reduction module 312 suitably can reduce the radiofrequency field power of NFC device, the stability of NFC communication can be maintained, do not affect Consumer's Experience, the power consumption of NFC device can be reduced again, extend its standby working time.
In the optional execution mode of another kind, as shown in Figure 7, radiofrequency field power regulation module 30 comprises:
Distance Judgment module 321, for judging whether described distance is greater than threshold value;
Adjustment module 322, for increasing the radiofrequency field power of described NFC device when described distance is greater than threshold value.
Above-mentioned threshold value sets according to the effective communication range of NFC device, when NFC device works in the active mode, needs to send radiofrequency field and carries out NFC communication with NFC target device.Now, NFC device detects the distance l between itself and NFC target device by the range unit of its laser ranging system configured or other type, in the process of NFC communication, if Distance Judgment module 321 judges that the distance l of current time is less than or equal to threshold value D, then illustrate that current NFC target device is in the effective communication range of NFC device, now need not adjust the radiofrequency field power of NFC device; If Distance Judgment module 321 judges that the distance l between current time NFC device and NFC target device is greater than the threshold value D preset, then illustrate that the distance between NFC device and NFC target device is excessive, now adjustment module 322 suitably can increase the radiofrequency field power of NFC device, to ensure the stability of NFC communication.
The system of above-mentioned raising NFC communication stability can perform the method for the raising NFC communication stability that the embodiment of the present invention provides, and possesses the corresponding functional module of manner of execution and beneficial effect.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. improve a method for NFC communication stability, it is characterized in that, comprise the steps:
When NFC device and NFC target device carry out NFC communication, judge whether described NFC device has the initiative pattern:
If so, the distance between described NFC device and described NFC target device is then obtained;
According to the radiofrequency field power of the described NFC device of described distance adjustment.
2. the method for raising NFC communication stability according to claim 1, is characterized in that, also comprise the steps:
When described NFC device has the initiative pattern, send enabled instruction, open the laser ranging system of described NFC device;
Receive the distance between described NFC device and NFC target device that described laser ranging system reports.
3. the method for raising NFC communication stability according to claim 1 and 2, is characterized in that, the process according to the radiofrequency field power of the described NFC device of described distance adjustment comprises the following steps:
If the described distance of current time is greater than the described distance in a moment, then increase the radiofrequency field power of described NFC device;
If the described distance of current time is less than the described distance in a moment, then reduce the radiofrequency field power of described NFC device.
4. the method for raising NFC communication stability according to claim 2, is characterized in that, after receiving the distance between the described NFC device that reports of described laser ranging system and described NFC target device, also comprises the steps:
If described NFC device is in Passive Mode and/or stops NFC communication, then send halt instruction, close the laser ranging system of described NFC device.
5. the method for raising NFC communication stability according to claim 1, is characterized in that, the process according to the radiofrequency field power of the described NFC device of described distance adjustment comprises the following steps:
Judge whether described distance is greater than threshold value;
If so, the radiofrequency field power of described NFC device is then increased; If not, then keep the radiofrequency field power of NFC device constant.
6. improve a system for NFC communication stability, it is characterized in that, comprising:
Mode decision module, for when NFC device and NFC target device carry out NFC communication, judges whether described NFC device has the initiative pattern:
Distance acquisition module, for obtaining the distance between described NFC device and described NFC target device when described NFC device has the initiative pattern;
Radiofrequency field power regulation module, for the radiofrequency field power according to the described NFC device of described distance adjustment.
7. the system of raising NFC communication stability according to claim 6, is characterized in that, described distance acquisition module comprises:
Opening module, for when described NFC device has the initiative pattern, sends enabled instruction, opens the laser ranging system of described NFC device;
Receiver module, for receiving the distance between described NFC device and described NFC target device that described laser ranging system reports.
8. the system of raising NFC communication stability according to claim 6, is characterized in that, described radiofrequency field power regulation module comprises:
Power increases module, for when the described distance of current time is greater than the described distance in a moment, increases the radiofrequency field power of described NFC device;
Power reduction module, for when the described distance of current time is less than the described distance in a moment, reduces the radiofrequency field power of described NFC device.
9. the system of raising NFC communication stability according to claim 7, is characterized in that, described distance acquisition module also comprises:
Closing module, during for being in Passive Mode in described NFC device and/or stopping NFC communication, sends halt instruction, closes the laser ranging system of described NFC device.
10. the system of raising NFC communication stability according to claim 6, is characterized in that, described radiofrequency field power regulation module comprises:
Distance Judgment module, for judging whether described distance is greater than threshold value;
Adjustment module, for increasing the radiofrequency field power of described NFC device when described distance is greater than threshold value.
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| CN201510998951.7A CN105554867A (en) | 2015-12-24 | 2015-12-24 | Method and system for improving stability of NFC communication |
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| CN201510998951.7A CN105554867A (en) | 2015-12-24 | 2015-12-24 | Method and system for improving stability of NFC communication |
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Cited By (1)
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| CN106231545A (en) * | 2016-09-21 | 2016-12-14 | 广东欧珀移动通信有限公司 | Reduce the method and device of near-field communication module power consumption |
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