| 摘要 |
PURPOSE:To improve the privacy of communication and to avoid interception of data by giving code assigning information of a communication frame set next to a KEY frame in a communication frame and offering sequentially the communication frame where a BPS code and a Manchester code are assigned at random. CONSTITUTION:A communication code in a data communication is designated to a BPS code or a Manchester code at initializing, the communication frame is formed as the frame constitution where the BSP code and the Manchester code are arranged at random in the unit of 1byte, the random pattern is formed by a random number formed by the transmission side and its random number is set in the communication frame as the key frame to indicate the communication frame constitution transmitted next. That is, the code assignment of the (N+1)th transmission data transmitted next is written in the KEY frame in the N-th communication frame. Further, the assignment whether each frame in the N-th communication frame is written in the BPS code or in the Manchester code is read from the KEY frame of the (N-1)-th communication frame. |
