CN102256341A - Method for reducing power consumption of high-frequency wireless smart card - Google Patents
Method for reducing power consumption of high-frequency wireless smart card Download PDFInfo
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- CN102256341A CN102256341A CN201110092837XA CN201110092837A CN102256341A CN 102256341 A CN102256341 A CN 102256341A CN 201110092837X A CN201110092837X A CN 201110092837XA CN 201110092837 A CN201110092837 A CN 201110092837A CN 102256341 A CN102256341 A CN 102256341A
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Abstract
The invention discloses a method for reducing the power consumption of a high-frequency wireless smart card. The method comprises the following steps of: connecting a terminal communication module of the high-frequency wireless smart card with a radio frequency module through an input/output (I/O) ports, and operating the radio frequency module to switch between a sleep mode and transceiving mode through the I/O ports; initializing parameter of the radio frequency module; making the radio frequency module enter the sleep mode at a duration of x; making the radio frequency module enter the transceiving mode at a duration of y; during a cycle between the sleep mode and the transceiving mode, detecting whether the radio frequency module receives a command or data of a card reader; and if the command and/or data of the card reader is received, executing a card swiping transaction process for time of z through the high-frequency wireless smart card. The method has the characteristic of low power consumption, the card swiping speed is high, and the method is simple, easy to implement and low in cost and contributes to realizing industrialized production and large-scale popularization and application of the high-frequency wireless smart card.
Description
Technical field
The present invention relates to wireless communication technology field, specifically a kind of method that reduces high frequency wireless smart card power consumption.
Background technology
Along with mobile communication terminal, such as the application popularization of mobile phone, based on the stored value card of mobile communication terminal, new application such as mobile phone gate inhibition, mobile-phone payment also more and more cause people's extensive interest.
Satisfy these and use, best mode is identical or close with the existing radio-frequency card occupation mode of swiping the card.This just requires mobile communication terminal can come to come swap data with consumption terminal or access controller by RFDC as radio-frequency card.
Realize functions such as mobile payment by mobile phone, need on mobile phone, realize near field communication (NFC) function, realize on mobile phone that at present near field communication (NFC) function mainly contains following several modes, first kind of pattern is the NFC mobile phone, it is integrated NFC communication module (Near FieldCommunication) on existing mobile phone, what adopt is the low frequency induction pattern of 13.56MHz, belongs to passive type, needs the user to change mobile phone; Second kind of pattern is the low frequency induction module that installs 13.56MHz on mobile phone SIM additional, needs the repacking SIM card, and can the very big sensor circuit of band on SIM, and this pattern can't large-scale commercial applicationsization; The third pattern is the active high-frequency induction pattern that installs 2.4G on mobile phone additional, can effectively solve penetration problem, and this kind pattern is developed in Japan, and shortcoming is that the user needs special-purpose mobile phone, and this point is not suitable for the use habit that the user changes mobile phone; The 4th kind of active high-frequency induction module (to call the RF-SIM card in the following text) that pattern is integrated 2.4G on SIM card, this kind pattern meets user's use habit very much.China is domestic, and what promoting is the 4th kind of pattern, and as the primary standard of mobile payment, but with regard to present commercial situation, mainly there is following shortcoming: the firstth, mobile phone is to the adaptability problem of RF-SIM, the secondth, the matching problem between RF-SIM card and the RF-SIM card card-reading devcie, show that mainly card reading speed is slow, Card Reader is apart from instability, the control Card Reader is apart from difficulty, for same reader device, the mobile phone Card Reader distance that has is very near, and the mobile phone Card Reader distance that has is far, and the 3rd is that mobile phone screen display result is slow behind the Card Reader.Above shortcoming, from product, mainly ascribe two problems to, the technology that problem is the high frequency wireless smart card does not pass a test, and power consumption height, immediate current are big, and card reading speed is slow, cause a lot of mobile phones can not be suitable for this high frequency wireless smart card, or slow because of card reading speed, the user experience poor effect causes popularization to make slow progress.Another problem is the problem of reader device, shows that mainly the reading card distance lacks effective control method.In a word, the product that existing technology is released is the cost height not only, and experience effect is bad, thereby has influenced existing Mobile business user's experience and commercialization process, and this also is one of obstacle of promoting at present this technology application.
How to realize the low-power consumption of high frequency wireless smart card, effectively control immediate current and realize swiping the card at a high speed, be technological difficulties in this field always, also is the key that realizes the industrialization of high frequency wireless smart card.Have some patents that correlation technique is studied, for example, patent 200410036263.4 has been described the hardware basic composition of high frequency wireless smart card, the key element that comprises, but how elaboration is gone to realize low-power consumption and is swiped the card at a high speed; How another patent 200710124354.7 finer several physical structures and logic theory of setting forth the high frequency wireless smart card does not reduce high frequency wireless smart card power consumption and very important software and hardware technology such as realize swiping the card at a high speed but relate to equally.
Though in the prior art, had and in SIM cards of mobile phones, set up the technical scheme of radio frequency chip, so that this type of wireless smart card that possesses SIM card function and radio frequency chip simultaneously can possess application prospect widely with the expansion function of use.But existing technical scheme all is only to set up the low frequency radio frequency chip in SIM cards of mobile phones at the beginning of research, does not all relate to or considers to increase power consumption increase problem behind the radio frequency chip.
Because the power consumption of low frequency radio frequency chip is lower, little if just increase the low frequency radio frequency chip to the power consumption influence of wireless smart card, also be in the acceptable scope.But, development along with new technology, new application more requires to use the high-frequency radio frequency chip, but high-frequency radio frequency chip power consumption in working order is very big, if ignore its power problems fully, still remove to set up the high-frequency radio frequency chip, then have following problem according to the technical scheme of in SIM cards of mobile phones, setting up the low frequency radio frequency chip:
1, the high-frequency radio frequency chip power-consumption is excessive, causes the cell phone standby time too short, brings great inconvenience to the client; Electric current is generally below 500 microamperes during common SIM card resting state, and electric current is general several milliamperes during work.Stand-by time is far above the operating time, and average current should be below 1 milliampere like this.The stand-by time of existing mobile phone is to have taken into full account this factor and design, and its cardinal principle is that the average operating current of requirement mobile phone is low more good more.The high-frequency model of high frequency wireless smart card electric current when making wireless transmission is very big.No matter HFS is operated in receiving mode, or sending mode, and electric current all reaches more than 7 milliamperes at least, the highest can reaching more than 12 milliamperes.Together with original mobile phone IC-card power consumption, average current will be above 8 milliamperes.For battery 600 Milliampere Hours, 72 hours mobile phone of standby, long-term work stand-by time under wireless transceiving modes will directly reduce to original half promptly 36 hours, even lower.
2, the high-frequency radio frequency chip power-consumption is excessive, the input voltage that requires is between 1.9V～3.6V, and offering the operating voltage of SIM card, mobile phone roughly has three kinds, be 1.8V, 3.0V, 5.0V, the high-frequency radio frequency chip can because of voltage is low can't operate as normal, or, reduce yields and compatibility greatly because of overtension damages, can not be well and the supporting use of existing most of mobile phones;
3, the high frequency intelligent wireless is stuck in an important operating process in the production procedure, exactly will be to sticking into capable initialization operation, for example write software systems, write the parameter of dispatching from the factory, write initial key etc., existing habitual initial method is exactly that the high frequency wireless smart card is inserted the operation that a contact card reader reads and writes data, and the operating voltage of existing contact card reader is all at 5.0V, input voltage 1.9V～the 3.6V that requires with the high-frequency radio frequency chip does not match, be easy to cause the high frequency intelligent wireless to be stuck in infringement when writing card, the hidden danger when influencing the yields of dispatching from the factory and causing the user to use.
For mobile communication terminal, mobile phone particularly, low-power consumption is an important technology requirement, otherwise can cause the cell phone standby time too short, can't discern the RF-SIM card, even can't start shooting; Swiping the card at a high speed also is an important indicator of mobile payment requirement.Therefore, solve this two key problem in technology that problem is the industrialization of high frequency wireless smart card.
Summary of the invention
The present invention is intended to provide a kind of method that reduces high frequency wireless smart card power consumption, when being used as mobile communication facility, the high frequency wireless smart card can be counted reportedly defeated by high-frequency emission, can realize the application of mobile payment function and Internet of Things easily, uses the high frequency wireless smart card of this method, not only has low in power consumption, the speed of swiping the card is fast, and method is simple, implements easily, cost is low, helps realizing the industrialization production of high frequency wireless smart card and applying on a large scale.
Technical scheme of the present invention is as follows, and a kind of method that reduces high frequency wireless smart card power consumption is characterized in that may further comprise the steps:
1) the terminal communication module of high frequency wireless smart card connects upward radio-frequency module by the IO mouth, and can switch between park mode and transceiver mode by these IO mouths manipulation radio-frequency modules,
2) radio-frequency module parameter initialization,
3) radio-frequency module enters park mode, and the time that park mode continues is x,
4) radio-frequency module enters transceiver mode then, and the time that transceiver mode continues is y, sets x＞y,
5) radio-frequency module circulation repeatedly between above-mentioned park mode and transceiver mode,
6) between above-mentioned park mode and transceiver mode, circulate in, detect order or data that whether radio-frequency module receives card reader:
If do not receive the order or the data of card reader, return step 5;
If receive the order and/or the data of card reader, then the high frequency wireless smart card begins to carry out the transaction flow of swiping the card, enter transaction time of implementation Z, the said transaction flow of swiping the card refers to the process of card reader and high frequency wireless smart card work complete exchanges data, safety verification and a storage
7) if the value of x+y is more little, the speed that the user swipes the card continuously is fast more, if x is big more divided by the value of y, average operating current is low more, and the effect that reduces power consumption is good more.
The present invention in actual applications, according to different application scene and the length of x time (by the complexity decision of transaction), the value of x and y can be done different adjustment, but x must be greater than y, if the y value guarantee enough to receive minimum one effectively order and data just can, if the value of x+y is more little, the speed that the user swipes the card continuously is fast more, if x is big more divided by the value of y, average operating current is low more, and the effect that reduces power consumption is good more.
According to this method, the high frequency intelligent wireless is stuck in the work of swiping the card, though there is high operating current moment, its time that takies is very of short duration, has satisfied the requirement of GSM11.11 standard, and regular handset can both be suitable for.
The present invention not only has low in power consumption, and the speed of swiping the card is fast, and method is simple, implements easily, and cost is low, helps realizing the industrialization production of high frequency wireless smart card and applying on a large scale.
Description of drawings
The present invention has following accompanying drawing:
A kind of structural representation of Fig. 1 high frequency wireless smart card
Fig. 2 software flow schematic diagram of the present invention
The another kind of structural representation of Fig. 3 high frequency wireless smart card
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further details.
High frequency of the present invention is meant VHF frequency range and uhf band and the SHF frequency range that is easy to penetrate mobile communication terminal, avoids simultaneously with the employed frequency range of mobile communication, with anti-collision.
Described high frequency wireless smart card comprises two parts at least, a part is to be used for the terminal communication module of communicating by letter with mobile communication terminal (such as mobile phone), this module is mainly used in authentication, parameter storage of mobile communication etc., another part is to be used for the radio-frequency module that high frequency is swiped the card, and is used for the function such as the payment of swiping the card, gate inhibition's control of mobile communication terminal.The structure of high frequency wireless smart card is referring to Fig. 1, Fig. 3.
Among Fig. 1, high frequency wireless smart card 01 is provided with terminal communication module 02 and radio-frequency module 03, terminal communication module 02 and mobile communication terminal 04 (described mobile communication terminal can be mobile phone) swap data are realized the correlation function of mobile communication, and radio-frequency module 03 and card reader 05 swap data are realized the radio frequency correlation function of swiping the card.
Among Fig. 3, high frequency wireless smart card 01 is provided with terminal communication module 02 and radio-frequency module 03, terminal communication module 02 and mobile communication terminal 04 (described mobile communication terminal can be mobile phone) swap data are realized the correlation function of mobile communication, and radio-frequency module 03 and card reader 05 swap data are realized the radio frequency correlation function of swiping the card.The master chip of terminal communication module 02 can be selected the TG360 of EM company for use, and radio-frequency module 03 can select for use NRF24L01 as master chip, an IO pin 06 of TG360 chip is connected to the CE pin 07 of NRF24L01, to realize the data interaction function of the two.
The pattern that the present invention adopts the dormancy of a kind of most time radio-frequency module, wakes to be used alternatingly reduces the average current of high frequency wireless smart card, reaches the purpose of low-power consumption.By this mode, immediate current also can be controlled in the claimed range of GSM11.11 standard to mobile phone intelligent card.
Electric current is generally below 500 microamperes during common SIM card resting state, and electric current is general several milliamperes during work.Stand-by time is far above the operating time, and average current should be below 1 milliampere like this.The stand-by time of existing mobile phone is to have taken into full account this factor and design, and its cardinal principle is that the average operating current of requirement mobile phone is low more good more.
According to the prior art level, the radio-frequency module of high frequency wireless smart card electric current when making wireless transmission is very big.No matter radio frequency part is operated in receiving mode, or sending mode, and electric current all reaches more than 7 milliamperes at least, the highest can reaching more than 12 milliamperes.Together with the power consumption of original SIM cards of mobile phones terminal communication module section, average current will be above 8 milliamperes.For battery 600 Milliampere Hours, 72 hours mobile phone of standby, long-term work stand-by time under wireless transceiving modes will directly reduce to original half promptly 36 hours, even lower.But for the convenience of swiping the card and using, the high frequency wireless smart card is not suitable for manually being set in radio frequency park mode and the manual switching of radio frequency operation pattern intercropping.This manual mode is infeasible in actual applications.
Though the radio-frequency module of high frequency wireless smart card electric current when making wireless transmission is very big, exchange hour is short, number of times is few because swipe the card, and the electric energy of consumption can not bring materially affect to cell phone standby.The speed of HF communication is fast especially, and the chip that is operated in the 2.4G frequency range substantially all can reach the above speed of per second 1Mbit.Swiping the card the transaction operating time like this can be very short, can not surpass 8000bit such as the general data trade amount of transaction of swiping the card, and adds computing flow process expense, and the time is can not surpass 100ms.Suppose 50 cards of one day brush of a user, 5 seconds of whole exchange hours in 24 hours.Calculate for 8 milliamperes according to average current, but the power consumption that the exchange that swipes the card produces is equivalent to allow 72 hours mobile phone of a standby reduce 15 seconds of standby, this loss is that the user is receptible fully.Therefore, we only need lay stress on the mode of operation of the radio-frequency module that reduces the high frequency wireless smart card, promptly will allow radio-frequency module be in park mode as far as possible, rather than be in transceiver mode.And can between radio frequency park mode and radio-frequency receiving-transmitting pattern, switch rapidly according to certain condition.
The electric current of radio frequency radio-frequency module between rest period is very faint, generally be to measure with microampere, if the high frequency wireless smart card can be accomplished the mode that the dormancy of most time radio frequency, wakes transceiver mode are used alternatingly when waiting for the card reader communication handshake, the average current of high frequency wireless smart card will be reduced greatly.
Usually generally between 100ms～300ms, if surpass 300ms, user's the experience meeting of swiping the card is very bad, belongs to not received index wait charge time of radio-frequency card.Application demands such as mobile phone gate inhibition, mobile-phone payment equally also have this restriction.The said transaction flow of swiping the card refers in order to finish a specific application, and card reader and high frequency wireless smart card are made the process of complete exchanges data, safety verification and a storage.
The present invention uses software setting, the workflow of radio-frequency module is divided into x, y, z three parts from the time, wherein x represents the radio frequency park mode time, y represents the wakes transceiver mode time, the z representative wakes the exchange hour of finishing the work after the success of shaking hands up, and the x time is greater than the y time, and the y time is as far as possible little, but guarantee the complete packet that a card reader sends that receives, the reliable time of minimum requirements is exactly the transmission time of 2 packets.Speed and each packet 500bit according to HF communication per second 1Mbit calculate the minimum 1ms that is made as of y time.HF communication speed is high more, and the y time is low more.As radio-frequency module workflow Fig. 2, at first, this end of card reader is arranged to round-the-clock transceiver mode, repeatedly repeat to send effective order and data message, with the mobile phone power-on of high frequency wireless smart card as SIM, high frequency intelligent wireless card initialization, comprise the radio frequency parameter initialization of radio-frequency module, after the radio-frequency module initialization is finished, radio-frequency module enters park mode, this pattern duration is x, and the x duration finishes, and radio-frequency module enters the radio-frequency module transceiver mode, this pattern duration is y, because card reader is to be in transceiver mode always, at this moment, high frequency wireless smart card radio-frequency (RF) receiving and transmission module detects order or the data whether card reader is arranged, because the speed of HF communication is exceedingly fast, radio communication with 2.4G is example, as long as the duration of y just can guarantee that greater than 1ms the high frequency intelligent wireless is stuck in data and the order that can reliably receive card reader on the timeslice y of wakes transceiver mode.If do not swipe the card, confiscate order or data that card reader is sent, high frequency wireless smart card radio-frequency module changes the radio frequency park mode over to, promptly enters the x duration once more; If swipe the card, promptly in the y duration, can receive order or the data that card reader is sent, at this moment, the radio-frequency module of high frequency wireless smart card and card reader are shaken hands successfully, enter the transaction duration z that swipes the card, according to the complexity of transaction, the z duration is different in size, and it is complicated more to conclude the business, and the z duration is long more.Because HF communication speed is fast especially, transaction deadline (z duration) generally also can be finished in 100ms.When transaction is finished, promptly the z duration finishes, and changes the radio frequency park mode once more over to, i.e. the x duration.Like this, the high frequency wireless smart card is arranged in x duration and the interregional switching in turn of y duration with radio-frequency module, when the high frequency wireless smart card is swiped the card task, can detect effective order or the data of whether having received card reader at y duration radio-frequency module.Do not reenter the x duration if receive.If receive, then enter the z duration, according to the complexity of transaction, z duration different in size.After transaction is finished, enter the x duration again.After the success, both sides also can finish the transaction of total data flow process at the utmost point in the short time in case shake hands.In the practical application, according to different application scene and the length of x time (by the complexity decision of transaction), the value of x and y can be done different adjustment, but x must be greater than y, if the y value guarantee enough to receive minimum one effectively order and data just can, if the value of x+y is more little, the speed that the user swipes the card continuously is fast more, if x is big more divided by the value of y, average operating current is low more, and the effect that reduces power consumption is good more.The specific design of software is referring to Fig. 2
Below demonstrate on the high frequency wireless smart card and cooperate the low-power consumption that realization high frequency wireless smart card radio frequency is swiped the card by software and hardware.As shown in Figure 3, the terminal communication module section is selected the TG360 chip of Switzerland EM company for use, and radio-frequency communication module adopts the NRF24L01 chip as main chip.An IO pin of TG360 chip is connected the CE pin of going up the NRF24L01 chip.Safety chip is by software programming, alternately export high level and low level continuously according to the different proportion time, high level time is short, low level time is long, just radio-frequency module can be arranged to the mode that the dormancy of most time radio frequency, wakes transceiver mode are used alternatingly.
In the practice, if the high frequency wireless smart card uses the radio-frequency module of being made up of the NRF24L01 chip, electric current is about 320 microamperes during the radio frequency dormancy, and average current is 8 milliamperes when being in transceiver mode.We are arranged to it in per 60 milliseconds when waiting for the card reader communication handshake, and 4 milliseconds are in transceiver mode, and promptly the value of y is 4,56 milliseconds and is in park mode, and promptly the time of x is 56.Like this, the average standby current of whole radio frequency part is 60 milliseconds=0.832 milliampere of (8 milliamperes * 4 milliseconds+320 microamperes * 56 milliseconds) ÷.Estimation is got up, and is equivalent to 72 hours mobile phone of a standby and waits a little while,please machine about 7 hours.The mobile phone stand-by time is not had much affect, reach the target of low-power consumption substantially.The speed of high-frequency emission is very fast, for the chip of communicating by letter on the 2.4G frequency range, generally all can reach the above throughput of per second 1Mb.Because card reader has adopted continuous emission mode, therefore, on this transceiver mode timeslice of 4 milliseconds (y), high frequency speed with 2.4G is example, can send at least 8 packets, therefore the radio-frequency module of high frequency wireless smart card part receives that enough minimum one is effectively ordered and data, in case receive effectively an order and data, high frequency wireless smart card and card reader are just shaken hands successfully, after enter common radio frequency operation pattern (z) again, because the speed of high-frequency data is very fast, the mode of operation time (z) also only continues the very short time, generally in 100ms.Maximum 60 milliseconds stand-by period before adding, so for user experience, finishing the time of once swiping the card altogether is x+y+z, and promptly in the 160ms, the user feels can be very good, made full use of the high speed characteristics of HF communication, realized swiping the card at a high speed.In order to save the method that power consumption adopted of radio frequency operation, just increased the wait expense of swiping the card of 60ms.And this expense can't influence the sensation of user card punching.
In the practical application, according to different application scene and the length of x time (by the complexity decision of transaction), the value of x and y can be done different adjustment, but x must be greater than y, if the y value guarantee enough to receive minimum one effectively order and data just can, if the value of x+y is more little, the speed that the user swipes the card continuously is fast more, if x is big more divided by the value of y, average operating current is low more, and the effect that reduces power consumption is good more.
According to this method, the high frequency intelligent wireless is stuck in the work of swiping the card, though there is high operating current moment, its time that takies is very of short duration, has satisfied the requirement of GSM11.11 standard, and regular handset can both be suitable for.
Claims (1)
1. method that reduces high frequency wireless smart card power consumption is characterized in that may further comprise the steps:
1) the terminal communication module of high frequency wireless smart card connects upward radio-frequency module by the IO mouth, and can switch between park mode and transceiver mode by these IO mouths manipulation radio-frequency modules,
2) radio-frequency module parameter initialization,
3) radio-frequency module enters park mode, and the time that park mode continues is x,
4) radio-frequency module enters transceiver mode then, and the time that transceiver mode continues is y, sets x＞y,
5) radio-frequency module circulation repeatedly between above-mentioned park mode and transceiver mode,
6) between above-mentioned park mode and transceiver mode, circulate in, detect order or data that whether radio-frequency module receives card reader:
If do not receive the order or the data of card reader, return step 5;
If receive the order and/or the data of card reader, then the high frequency wireless smart card begins to carry out the transaction flow of swiping the card, enter transaction time of implementation Z, the said transaction flow of swiping the card refers to the process of card reader and high frequency wireless smart card work complete exchanges data, safety verification and a storage
7) if the value of x+y is more little, the speed that the user swipes the card continuously is fast more, if x is big more divided by the value of y, average operating current is low more, and the effect that reduces power consumption is good more.
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| CN201110092837XA CN102256341A (en) | 2010-05-19 | 2011-04-14 | Method for reducing power consumption of high-frequency wireless smart card |
| PCT/CN2012/000112 WO2012139408A1 (en) | 2011-04-14 | 2012-01-20 | Method for reducing power consumption of high frequency wireless intelligent card |
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| WO2012139408A1 (en) * | 2011-04-14 | 2012-10-18 | Wang Haiquan | Method for reducing power consumption of high frequency wireless intelligent card |
| CN102831452A (en) * | 2012-08-31 | 2012-12-19 | 电子科技大学 | Low power consumption operation for active RFID (Radio Frequency Identification) system |
| CN103167591A (en) * | 2011-12-14 | 2013-06-19 | 国民技术股份有限公司 | Radio frequency mobile communication card and consumption management method thereof |
| CN103297333A (en) * | 2013-04-10 | 2013-09-11 | 安徽海聚信息科技有限责任公司 | Gateway information processor and wifi gateway control method with processor |
| CN103514419A (en) * | 2012-06-29 | 2014-01-15 | 中兴通讯股份有限公司 | Method for determining IC card maintaining power and OBU |
| CN105307251A (en) * | 2015-11-13 | 2016-02-03 | 罗中良 | Low-power-consumption Internet of Things module and control method thereof |
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| CN112183140A (en) * | 2020-09-30 | 2021-01-05 | 上海创功通讯技术有限公司 | Parameter calling method, mobile terminal and system |
| CN113888805A (en) * | 2021-08-27 | 2022-01-04 | 金卡智能集团股份有限公司 | Near field and remote communication metering device and system |
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Application publication date: 20111123 |