Data exchange communication method between contactless card and terminal
A non-contact card and data exchange technology, applied in digital transmission systems, using return channels for error prevention/detection, reading/writing/querying/recognition near-field transmission systems, etc., can solve complex communication, difficult maintenance, terminal and Problems such as the complexity of contactless card communication, to achieve the effect of easy-to-understand maintenance management, clear organization, easy-to-understand and maintain
Active Publication Date: 2018-05-08
AITIWEIER ELECTRONICS TECH BEIJING
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The communication between the existing terminal and the contactless card is complicated and redundant. Therefore, how to simplify the communication between the terminal and the contactless card, and how to avoid the complicated and difficult to maintain communication between the terminal and the contactless card are the domain contents Problems to overcome
Method used
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Embodiment 1
[0084] refer to figure 1 , the data exchange communication method between the contactless card and the terminal described in this embodiment, the exchange data between the terminal and the contactless card is realized based on a state machine, and the method is specifically:
[0085] Initialize the variable, set the state machine to I-BLOCK; judge the state of the state machine, and then complete the data exchange in this state;
[0086] In the variable initialization process, the first variable is added as a flag, and the flag is NAD or CID, and the second variable is added to record the total length of the data to be sent. The flag bit records the current communication mode.
[0087] (1) Refer to figure 1 and figure 2 , when the state machine is in I-BLOCK mode, the data to be interacted will be packaged, and the state machine will set TRARCV after the data is packaged, more specifically:
[0088] A11, judge whether the received data block is a chain block; if so, put t...
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The invention discloses a data exchange communication method between a contactless card and a terminal, related to the field of electronic communication. The data exchange between the terminal and thecontactless card is realized based on a state machine. The data exchange communication method between the contactless card and the terminal comprises the following steps: initializing variables, andsetting the state machine to I-BLOCK; judging the state of the state machine, and then completing the data exchange in the state; adding a first variable to be marked as a flag bit in the initialization of the variables, wherein the flag bit is NAD or CID; and adding a second variable to record the total length of data to be sent. The data exchange communication method between the contactless cardand the terminal adopts the state machine to control each link, therefore, the data processing and exception processing of the blocks such as I, R and S are realized.
Description
technical field [0001] The invention relates to the field of electronic communication, in particular to a data exchange communication method between a contactless card and a terminal. Background technique [0002] In daily life, smart cards and financial cards with contactless functions are becoming more and more common, and the scope of application is becoming wider and wider. The communication between the existing terminal and the contactless card is complicated and redundant. Therefore, how to simplify the communication between the terminal and the contactless card, and how to avoid the complicated and difficult to maintain communication between the terminal and the contactless card are the domain contents Difficulties that need to be overcome. Contents of the invention [0003] The purpose of the present invention is to provide a data exchange communication method between a contactless card and a terminal, so as to solve the aforementioned problems in the prior art. ...
Claims
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IPC IPC(8): H04L1/18H04B5/00
CPCH04L1/1848H04L1/1858H04L1/188H04L1/189H04B5/77H04B5/72
Inventor 李滨滨
Owner AITIWEIER ELECTRONICS TECH BEIJING