| 摘要 |
PURPOSE:To avoid slot contention between a valid data and an invalid data in advance, to obtain only the valid data and to build up a system with high throughput by allowing a master station to transfer information as to a valid line and a valid station to a slave station and stopping the transmission of the valid data from the information at the slave station. CONSTITUTION:A master station 1 transfers the information as to a valid line and a valid station to a slave station 2 in a network in the broadcast mode and the slave station 2 stops the transmission of a connection requiring data when the slave station 2 discriminates the communication with the opposite station to be disable based on the information received from the master station 1 in the case of communication. Upon the receipt of a call requirement, a connection requiring transmission deciding section 26 checks the availability of the use of line and of a destination station from a valid line/valid station list 24. As the result of the check, when the opposite station is decided to be communication enable, a connection requiring data is sent from a connection requirement/state information transmission section 21. On the other hand, in the case of disabled communication, a reject signal is transferred through a terminal call requirement reception section 25. Thus, the deterioration in the throughput from the slave station 2 to the master station 1 is prevented. |
