| 摘要 |
PURPOSE:To give impartially a chance of transmission to informations, and also to transmit them efficiently, even in case of informations whose attributes are different, by providing a process for discriminating an attribute of an information to be transferred, in a process for obtaining a use right of a transmission line. CONSTITUTION:In the figure, 200, 300 and 400 denote an access flag, a transfer field, and a newly provided data designating flag which is a flag for designating an attribute of information (data) by which it is allowed to execute a transmission by using the slot concerned. Contents (designated code) of the data designating flag 400 are set by a loop master 7 when the loop master 7 generates or updates a transmission frame. The loop master 7 usually executes an assignment of a data designating code in accordance with a table information, and thereafter, monitors successively a variation of an operating state of a network connecting apparatus, quantity and quality of a transmission line traffic, a use frequency of various designated slots, etc., and collects its data. Also, it executes a dynamic assignment change of the data designating code basing on the collected data. |
