| 摘要 |
PURPOSE:To attain a high speed packet switching, by using the right of usage being the guarantee of receiving of a packet for an addressed resource of opposite party and the right of usage of a common data bus as a token, so as to transmit/receive the data on a control bus provided as a loop. CONSTITUTION:When there exists a packet to be transferred in a transmission buffer memory of the own channel, a corresponding RVi is set to busy state (RVi=1) and the occupancy of the right of usage is declared, by monitoring a control bus 42 with an I/D circuit and a busy/idle detecting circuit and waiting for an RVi signal having a number coincident with the address of the packet, i.e., the idle state (not in use RVi=0) of the opposed receiving buffer memory. The packet in the transmission buffer memory is transferred through the common data bus 41. A DB of the control bus signal is reset to the idle state (DB= 0) by detecting the end of packet transfer and the right of usage of common data bus is given up. |
