CN104732385A - Full card with communication protocol integrated in radio-frequency chip and using method thereof - Google Patents
Full card with communication protocol integrated in radio-frequency chip and using method thereof Download PDFInfo
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- CN104732385A CN104732385A CN201310696468.4A CN201310696468A CN104732385A CN 104732385 A CN104732385 A CN 104732385A CN 201310696468 A CN201310696468 A CN 201310696468A CN 104732385 A CN104732385 A CN 104732385A
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Abstract
A full card with a communication protocol integrated in a radio-frequency chip and a using method thereof relate to the technical field of mobile payment. The full card of the invention adopts a three-chip or two-chip structure, wherein the three-chip structure includes a radio-frequency chip, a main control chip and a security chip, and the two-chip structure includes a radio-frequency chip and a main control chip with a security function. The full card is structurally characterized in that the radio-frequency chip is integrated with a communication protocol. On one hand, unnecessary wakeup to the main control chip caused by interference signals or a poor communication environment can be avoided, and meaningless power loss is avoided; and on the other hand, the communication protocol can get delay information inside the radio-frequency chip by a hardware or software way, so that better timing control on the communication protocol is achieved.
Description
Technical field
The present invention relates to mobile payment technical field, what be particularly applied to mobile payment field is integrated in full card in radio frequency chip and using method thereof by communication protocol.
Background technology
In recent years, mobile payment industry development also really comes into the life of people.So-called mobile payment refers to user carries out account payment to the commodity of consumption or service a kind of mode by individual mobile terminal (normally mobile phone).At home, mobile payment regulation uses frequency range to be 13.56MHz, based on this frequency range, existing mobile payment scheme mainly contains three kinds, one is NFC(near field communication) technology, the program needs embedded in mobile phone to have special NFC chip, so the popularization of the program is comparatively slow.First scheme is SIM Pass technology, and the program does not need to change existing mobile phone, but by the chip package required for radio communication in SIM cards of mobile phones or SD card, thus improve ease for use and the popularized type of scheme.But the program still needs one at SIM card or the external larger antenna of SD card, and antenna by the particular accessories of mobile phone as battery, the impact of metal shell etc. is comparatively large, so cause the handset compatibility of the program poor.The third scheme is full card technique, the program has continued to use the thought of SIM Pass technology, and improves, and radio communication chip and antenna is fully integratible on SIM card or SD card, no longer add external antenna, whole SIM card or SD card are equivalent to an active label.The high integration of full card scheme is proposed higher technical requirement to the link such as chip design, encapsulation, but whole scheme is in ease for use, the comprehensive advantage that the aspect such as generalization and handset compatibility shows, therefore also becomes a kind of scheme being concerned most and having an optimistic view of.
In full card scheme, most crucial technological difficulties are exactly by antenna miniaturization, can seal in SIM card or SD card.What miniature antenna the most directly affected is exactly communication capacity.Specifically, when Received signal strength, small size antenna can cause the external signal received to die down, and this can be solved by the sensitivity improving receiver.But when transmitting, there is the restriction of inborn fan-out capability in the load-modulate mode that traditional passive label adopts.Referring to Fig. 1, in load-modulate circuit, antenna ant and load capacitance CL forms resonance loop, and RL is equivalent load impedance.Modulating subcarrier, by the break-make of gauge tap, can change the size of loaded impedance, thus realizes the amplitude modulation(PAM) to the external subcarrier that antenna ends senses, this modulated wave is reflected back transmitting terminal, can obtain sending signal after carrying out envelope demodulation.What load-modulate can regard utilization as is mutual inductance principle, and when antenna is less, when environment is poor, mutual inductance effect can large high attenuation, so can not be used in full card scheme.In order to solve the hypodynamic problem of emission energy, existing full card scheme adopts a kind of initiatively multi-carrier modulation scheme.Be different from the load-modulate mode of passive label, adopt active label technology in full card scheme, inside tags can produce local 13.56MHz carrier wave, transmits after modulating local carrier, outputs to antenna ends launch through driving stage.This active multi-carrier modulation scheme enhances emissive ability by improving output power.
The scheme of what existing full card scheme adopted on physics framework is three chips or two chips.Referring to Fig. 2, three chip solution comprise radio frequency chip 1, safety chip 3 and main control chip 2.Radio frequency chip 1 processes the transmitting-receiving of wireless data, and safety chip 3 provides safe reliability for flow processs such as mobile payments, and main control chip 2 is the system program main body containing card, controls whole card and completes the related application such as telecommunications functions, mobile payment.Referring to Fig. 3, two chip solution are compared with three chip architectures, just by safety chip 3 and main control chip 2-in-1 be a chip, replace with a main control chip 2 with security function.The overall performance of full card scheme depends primarily on the performance of radio frequency chip 1, three chips or two chip solution no matter existing, the function of radio frequency chip 1 is all identical, all just carry out reception and the transmission work of data, and the treatment scheme relevant to communication protocol is all realize in main control chip 2 or safety chip 3.This implementation deposits problem both ways, and one is that radio frequency chip 1 receives data at every turn and all wants the cooperation of main control chip 2 to complete protocol processes flow process.Generally, in order to reduce the stand-by power consumption of mobile phone, main control chip 2 is all in dormant state when not working, and when radio frequency chip 1 receives data, wakes main control chip up by radio frequency chip 1, has then coordinated whole communication process.But when external environment there is undesired signal or communication conditions is very poor cause receiving erroneous frame time, the main control chip 2 equally data that can be waken up receiving judges, this causes, and main control chip 2 is insignificant wakes the unnecessary consumption with power consumption up.When more serious, if the situation sustainable existence of undesired signal or communication condition difference, so main control chip 2 will be in wake-up states always, dormancy cannot be entered, cause the quick consumption of power consumption, main control chip 2 will not stop to judge erroneous frame information and process simultaneously, may have influence on the operation of the functions such as the normal telecommunications of card.Another problem of this kind of scheme existence to estimate delayed data.Strict requirement is had to the specific time sequence of communication in some communication protocol, such as card is returned to the time interval FDT(frame delay time of card reader response in ISO14443 type A agreement) just there is very strict regulation, tolerance is no more than 0.6us, about 7 13.56MHz clock period.Because the data demodulation circuit of chip internal and 13.56MHz clock recovery all exist time delay with extraction circuit, therefore in order to control FDT well to meet protocol requirement, needing to calculate this part delayed data, then carrying out corresponding compensation of delay.Traditional passive non-contact card is all single chip solution, and therefore chip internal can be calculated relevant delayed data by the form of software or hardware, compensates in communication protocol FDT control flow for the delayed data obtained.But for full card scheme, no matter be two chip solution or three chip solution, agreement flow process is in main control chip 2, and main control chip 2 cannot calculate the delayed data obtaining resulting from radio frequency chip 1 inside, therefore can there is very large difficulty in the control of FDT.
Summary of the invention
In order to overcome Problems existing in above-mentioned full card technique scheme, the object of this invention is to provide and a kind ofly communication protocol is integrated into full card in radio frequency chip and using method thereof.It can avoid the waking up the unnecessary of main control chip of causing because of undesired signal or communication environment difference on the one hand, avoids the deadweight loss causing power consumption; Communication protocol can obtain the delayed data of this radio frequency chip inside by software or hardware mode on the other hand, thus reaches the better sequential control of communication protocol.
In order to reach foregoing invention object, technical scheme of the present invention realizes as follows:
Communication protocol is integrated in the full card in radio frequency chip, it adopts the structure of three chips or two chips.Three chip structures comprise radio frequency chip, main control chip and safety chip, and two chip structures comprise radio frequency chip and have the main control chip of security function.Its design feature is, is integrated with communication protocol in described radio frequency chip.
As mentioned above communication protocol is integrated in the using method of the full card in radio frequency chip, it uses three chip structures or two chip structures, and three chip structures comprise radio frequency chip, main control chip and safety chip, and two chip structures comprise radio frequency chip and main control chip.Its using method step is:
1) main control chip dormancy, radio frequency chip is in listening state, detects whether there is 13.56MHz field;
2) after radio frequency chip detects 13.56MHz field, enter duty, receive director data and carry out demodulation;
3) radio frequency chip is according to corresponding communication protocol, carries out decoding to director data, and according to the protocol processes function that chip self comprises, carries out the relevant communication protocol process in limit of power;
4) when the director data received exceeds the processing power scope of radio frequency chip, radio frequency chip wakes main control chip up, and the director data received is transferred to main control chip, completes further communication protocol process by main control chip.
In above-mentioned full card using method, described communication protocol process is that communication protocol realizes completely, or the communication protocol of part realizes.
Described radio frequency chip, except the modulation and demodulation completing data, also possesses the processing power of communication protocol.Described communication protocol process can be that communication protocol realizes completely, also can be section communication protocol realization.Do not need the participation of main control chip in the initial period that communication is set up, the process of agreement flow process only needs radio frequency chip complete independently, only has and just needs the adapter of main control chip to process subsequent protocol flow process when communication protocol performs certain certain depth time.
The present invention, owing to have employed said structure and method, compared with prior art, contains protocol processes function in radio frequency chip of the present invention.In the initial period that communication is set up, the communication data received can carry out independent protocol processes operation in radio frequency chip, and does not need the participation of main control chip.When only having agreement flow process to proceed to certain depth, just wake main control chip up and carry out further protocol processes, therefore when there is undesired signal or external communication environment is poor, the protocol processes flow process of radio frequency chip inside can't pass, also would not false wake-up main control chip, avoid the unnecessary consumption of power consumption.In addition, communication protocol process is placed on radio frequency chip inside by the present invention, and communication protocol can obtain the delayed data of this radio frequency chip inside by software or hardware mode, thus reaches the better sequential control of communication protocol.
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Accompanying drawing explanation
Fig. 1 is load-modulate mode circuit schematic diagram in prior art;
Fig. 2 is the structural representation that the present invention blocks three chip solution entirely;
Fig. 3 is the structural representation that the present invention blocks two chip solution entirely;
Fig. 4 is the workflow diagram of the embodiment of the present invention.
Embodiment
Communication protocol is integrated in the full card in radio frequency chip by the present invention, and it adopts the structure of three chips or two chips.Three chip structures comprise radio frequency chip 1, main control chip 2 and safety chip 3, two chip structure comprise radio frequency chip 1 and there is the main control chip 2 of security function, be integrated with communication protocol in radio frequency chip 1.
Below to adopt two chip solution, comprise ISO14443-3 type A agreement flow process (anti-collision flow process) in radio frequency chip 1, ISO14443-4 agreement flow process realizes in main control chip 2.
Referring to Fig. 4, the using method step of the embodiment of the present invention is:
1) main control chip 2 enters dormant state, to reduce the power consumption of full card.Whether radio frequency chip 1 enters listening state has 13.56MHz field to exist near judging at any time.
2), when radio frequency chip 1 detects that 13.56MHz field exists, radio frequency chip 1 starts to prepare to receive the director data sent.
3) while radio frequency chip 1 receives director data and after receiving, the data frame structure that radio frequency chip 1 can receive according to ISO14443 protocol testing whether protocol compliant requirement.If do not meet protocol requirement, meeting rebound step 2 again), the director data that wait-receiving mode is new.If protocol compliant requirement, frame structure inspection, by rear, continues to check whether current data command is within ISO14443-3 agreement (anti-collision flow process) scope.If so, then in radio frequency chip 1 to the communication protocol process that anti-collision flow process is correlated with.After process anti-collision treatment scheme, get back to step 2) continue the new director data of wait-receiving mode.
When the director data received exceeds the processing power scope of radio frequency chip 1, wake main control chip 2 up.Radio frequency chip 1 sends the director data just now received to main control chip 2, and main control chip 2 takes over follow-up communication protocol treatment scheme.
Claims (3)
1. communication protocol to be integrated in the full card in radio frequency chip by one kind, it adopts the structure of three chips or two chips, three chip structures comprise radio frequency chip (1), main control chip (2) and safety chip (3), two chip structures comprise radio frequency chip (1) and have the main control chip (2) of security function, it is characterized in that, described radio frequency chip is integrated with communication protocol in (1).
2. using method communication protocol being integrated in the full card in radio frequency chip as claimed in claim 1, it uses three chip structures or two chip structures, three chip structures comprise radio frequency chip (1), main control chip (2) and safety chip (3), two chip structures comprise radio frequency chip (1) and have the main control chip (2) of security function, and its method step is:
1) main control chip (2) dormancy, radio frequency chip (1) is in listening state, detects whether there is 13.56MHz field;
2) after radio frequency chip (1) detects 13.56MHz field, enter duty, receive director data and carry out demodulation;
3) radio frequency chip (1) is according to corresponding communication protocol, carries out decoding to director data, and according to the protocol processes function that chip self comprises, carries out the relevant communication protocol process in limit of power;
4) when the director data received exceeds the processing power scope of radio frequency chip (1), radio frequency chip (1) wakes main control chip (2) up, the director data received is transferred to main control chip (2), has carried out further communication protocol process by main control chip (2).
3. according to claim 2 communication protocol is integrated in the full card using method in radio frequency chip, it is characterized in that, described communication protocol process is that communication protocol realizes completely, or the communication protocol of part realizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310696468.4A CN104732385A (en) | 2013-12-18 | 2013-12-18 | Full card with communication protocol integrated in radio-frequency chip and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310696468.4A CN104732385A (en) | 2013-12-18 | 2013-12-18 | Full card with communication protocol integrated in radio-frequency chip and using method thereof |
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| CN104732385A true CN104732385A (en) | 2015-06-24 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201111118Y (en) * | 2007-06-15 | 2008-09-03 | 深圳市金溢科技有限公司 | Double-wake-up double-frequency composite traffic card for recognizing ambiguity path |
| CN101742619A (en) * | 2008-11-06 | 2010-06-16 | 国民技术股份有限公司 | Method for reducing stand-by power consumption of radio-frequency SIM (subscriber identity module) card by sequential trigger |
| CN203232451U (en) * | 2013-04-22 | 2013-10-09 | 深圳市实佳电子有限公司 | Full card payment smart card |
| CN203287939U (en) * | 2013-05-06 | 2013-11-13 | 中国移动通信集团湖北有限公司 | Mobile payment full-card supporting single-wire transport protocol |
-
2013
- 2013-12-18 CN CN201310696468.4A patent/CN104732385A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201111118Y (en) * | 2007-06-15 | 2008-09-03 | 深圳市金溢科技有限公司 | Double-wake-up double-frequency composite traffic card for recognizing ambiguity path |
| CN101742619A (en) * | 2008-11-06 | 2010-06-16 | 国民技术股份有限公司 | Method for reducing stand-by power consumption of radio-frequency SIM (subscriber identity module) card by sequential trigger |
| CN203232451U (en) * | 2013-04-22 | 2013-10-09 | 深圳市实佳电子有限公司 | Full card payment smart card |
| CN203287939U (en) * | 2013-05-06 | 2013-11-13 | 中国移动通信集团湖北有限公司 | Mobile payment full-card supporting single-wire transport protocol |
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Address after: 100083 Beijing City, Haidian District Wudaokou Wangzhuang Road No. 1 Tongfang Technology Plaza D floor 18 West Applicant after: Beijing Tongfang Microelectronics Company Address before: 100083 Haidian District Tsinghua Tongfang Technology Plaza, block A, floor 29, Beijing Applicant before: Beijing Tongfang Microelectronics Company |
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Application publication date: 20150624 |
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