Data transmission device and data transmission method and system

The invention provides a data transmission device, and a data transmission method and system. In the data transmission method, when a sending unit sends a data frame, after rate matching, the data frame is carried in a new data frame as business data and sent by means of visible light communication; and when a data frame which is sent by means of a visible light signal is received, after rate matching, business data in the data frame are extracted as the data frame and outputted through an interface module. Therefore, when data transmission is carried out, it is not necessary to parse the data frame to be transmitted, so as to realize the transparent transmission of the data frame and improve the security of data transmission; and besides, since the data frame is transmitted by means of visible light communication, the transmission rate can be significantly improved. 本发明提供了种数据传输装置及传输数据的方法和系统，本发明中，发送单元在发送数据帧时，进行速率匹配之后作为业务数据携带在新的数据帧中通过可见通通信的方式发送，在接收通过可见光信号的方式数据帧时，进行速率匹配后提取出其中的业务数据作为数据帧并通过接口模块输出。这样，在进行数据传输时，就无需对