| 摘要 |
PURPOSE:To improve transmission efficiency by counting a case of a transmitting data does not exist in the own equipment, and changing a dispersion control type token system to a random access type CSMA/CD system, when it is discriminated that the number of times of counting has reached a prescribed value. CONSTITUTION:A program executed by a control part 7 is stored in advance in an ROM8, and it is received by a frame and processed in the course of communication by a token passing system. Also, when a token 200 address to the self- device is received, whether a transmission request exists in the own equipment or not is checked, and when the transmission request exists, an information packet of a data to be transmitted is assembled. However, when the transmission request does not exist, a prescribed frequency register is added by ''1''. In case it is discriminated that the number of times of counting has reached a prescribed number of times, the first priority token 300 is assembled. Also, a dispersion control type token system is switched to a random access type CSMA/ CD system. |
