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Data transmission method

A data transmission method and data technology are applied in the field of data transmission in near field communication, which can solve the problems of reducing the difficulty of cloning cards, reducing system security, and the impact of near field communication development, and achieving the effect of solving application compatibility problems.

Active Publication Date: 2013-04-10
SHANGHAI FUDAN MICROELECTRONICS GROUP
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  • Abstract
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Problems solved by technology

[0007] 2) Smart cards are often a closed application environment, and between different applications in different regions, even if it is the same smart card, its initial configuration will be different
When the UID can be rewritten, the uniqueness management of the UID will face major challenges, which will cause confusion in the account management of some application systems, and reduce the security of the system, making it easier to clone cards, for example.
[0015] In summary, although SWP SIM has become a mainstream solution for near field communication, and corresponding technical standards have been formulated, the delay problem of SWP interface and the derived UID management problem will have a negative impact on the future development of near field communication. certain influence

Method used

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Embodiment Construction

[0039] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar extensions without violating the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

[0040] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] The structural diagram of the data transmission device in an embodiment of the present invention is as follows Figure 4 As shown, the data transmission device 100 includes a non-contact front-end module 101 and a security module 102 connected to the non-contact front-end module 101 by a single wire.

[0042] Among them, the contactless front-end module 101 is responsible for pr...

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Abstract

The invention relates to a data transmission method in near field communication. The data transmission method comprises the following steps of: acquiring a first signal; processing the first signal to obtain first data; re-encoding the first signal in real time to acquire a second signal; connecting and transmitting the second signal through a single wire; processing the second signal to form second data; encoding and modulating the second data to acquire a third signal; connecting and transmitting the third signal through a single wire; modulating the third signal to obtain second data; modulating a field signal of the second data in a Manchester encoding way to acquire a fourth signal; and transmitting the fourth signal. Compared with the prior art, under the condition of reaching the ISO14443 Type A standard, the communication delay between CLF and SE in a near field communication terminal is reduced, and then the safety problem and the time sequence compatibility problem in the SEare solved.

Description

technical field [0001] The invention relates to the technical field of near field communication, in particular to a data transmission method in near field communication. Background technique [0002] The mobile non-contact application based on the mobile communication device is currently an active application field in both technology and market, in which near field communication (Near Field Communication, NFC) technology is a typical representative. After several generations of development of NFC technology, its related technical standards and application specifications (such as ISO18092 and ISO21481) are becoming more and more mature, but the process of related products entering the market is much slower than expected. In addition to the long industrial chain involved in near-field communication technology, which leads to more complex application models and business models, the single-wire communication protocol (SWP) used in existing solutions is not compatible with existi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B5/00
Inventor 李蔚俞军石亦欣刘枫王磊
Owner SHANGHAI FUDAN MICROELECTRONICS GROUP
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