METHOD AND APPARATUS FOR DATA TRANSMISSION

• US 20130217328A1
• Filed: 10/27/2010
• Published: 08/22/2013
• Est. Priority Date: 10/27/2010
• Status: Active Grant

• Current Assignee: Shanghai Fudan Microelectronics Group Company Limited
• Original Assignee: Shanghai Fudan Microelectronics Group Company Limited
• Inventors: Li, Wei, Yu, Jun, Zhang, Gang
• Granted Patent: US 9,252,843 B2
• Time in Patent Office: Days
• US Class Current: 455/41.1
• CPC Class Codes: G06K 7/10237 the reader and the record carrier being capable of selectively switching between reader and record carrier appearance, e.g. in near field communication [NFC] devices where the NFC device may function as an RFID reader or as an RFID tag
• CPC Class Codes: G06K 7/10247 issues specific to the use of single wire protocol [SWP] in NFC like devices
• CPC Class Codes: G06K 7/10267 the arrangement comprising a circuit inside of the interrogation device
• CPC Class Codes: H04B 5/70 specially adapted for specific purposes
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04L 63/0492 by using a location-limited connection, e.g. near-field communication or limited proximity of entities
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

A method and an apparatus for data transmission between a contactless front element and a security element are provided. The method includes: the contactless front element transparently transmits first data obtained from a contactless identification device to the security element through a single wire connection; the security element processes the first data to generate second data; the contactless front element transparently transmits the second data obtained from the security element through the single wire connection to the contactless identification device. Compared with the prior art, the method can transmit the contactless data in real time between the contactless front element and the security element. Thus the security element can directly respond instructions sent by a proximity coupling device during simulating Proximity Integrated Circuit Card, so that the contactless front element becomes a transparent transport channel, the time order compatibility problem can be avoided, and the safety problem can be surmounted.

Claims

1. A method for data transmission, comprising:

a contactless front element transparently transmitting first data, which is obtained from a proximity coupling device, to a security element through a single wire connection;

the security element processing the first data to generate second data; and

the contactless front element transparently transmitting the second data, which is obtained from the security element through the single wire connection, to the proximity coupling device.

2. The method for data transmission according to claim 1, further comprising:

the contactless front element obtaining modulated first data from the proximity coupling device through radio frequency signals.

3. The method for data transmission according to claim 2, further comprising:

generating coded signals, which comprise complete real-time contactless information, through logically processing field clock signals and demodulated first data generated by a clock recovery and demodulation circuit in the contactless front element, and transparently transmitting the coded signals to security element.

4. The method for data transmission according to claim 1, further comprising:

the contactless front element transmitting the second data to the proximity coupling device through radio frequency signals.

5. The method for data transmission according to claim 4, further comprising:

the contactless front element modulating signals of the second data to obtain modulated second data and transmitting the modulated second data to the proximity coupling device.

6. The method for data transmission according to claim 1, further comprising:

the transparent transmission is a real-time transmission.

7. The method for data transmission according to claim 1, further comprising:

data transmitted between the contactless front element and the security element are synchronous to data transmitted between the contactless front element and the proximity coupling device.

8. A data transmission apparatus, comprising:

a contactless front element and a security element connected with the contactless front element through a single wire, wherein the contactless front element is configured to transparently transmit data between the security element and an external proximity coupling device.

9. The data transmission apparatus according to claim 8, wherein the transparent transmission is a real-time transmission.

10. The data transmission apparatus according to claim 8, where data transmitted between the contactless front element and the security element are synchronous to data transmitted between the contactless front element and the external proximity coupling device.

11. The data transmission apparatus according to claim 8, where a fixed delay of the contactless front element meets the requirement of frame delay time between the proximity coupling device and the proximity integrated circuit card, following the contactless standard.

12. The data transmission apparatus according to claim 8, wherein the contactless front element comprises a first signal generating element and a second signal demodulation element, and the security element comprises a first signal demodulation element and a second signal generating element, where the output port of the first signal generating element, the input port of the second signal demodulation element, the input port of the first signal demodulation element and the output port of the second signal generating element are electrically connected.

13. The data transmission apparatus according to claim 12, wherein the first signal generating element comprises a clock recovery and demodulation circuit and a logic processing circuit, where two output ports of the clock recovery and demodulation circuit are connected with two input ports of the logic processing circuit respectively and the output port of the logic processing circuit is the output port of the first signal generating element.

14. The data transmission apparatus according to claim 12, wherein the security element further comprises a main processing element, where the output port of the first signal demodulation element is connected with the input port of the main processing element, and the output port of the main processing element is connected with the input port of the second signal generating element.