Data communication frame generating method

摘要

An address generating method arbitrarily generates an address code as a connection address by using random numbers (step S601). Then a determination is made as to whether the generated address code includes any section representing a code identical to the BOF or EOF flag code (step S602). When the determination made in step S602 shows that it includes a section of the same code, it returns to step S601 to generate an address code again. When the determination in step S602 shows that it does not contain the same code section, that address code is determined as the connection address (step S603). This reduces the number of codes to be subjected to transparency processing in transparency control performed after the generation of the communication frame. This suppresses extension of the length of the communication frame after the transparency control, thus preventing deterioration of the data transmission (transfer) efficiency.