| 摘要 |
<p>PURPOSE:To reduce a large waiting time required for sending reservation information by allowing plural predetermined slave stations to respond to a transmission command to command a reservation frame from a master station. CONSTITUTION:Let the number of slave stations be 8, integral numbers 1-8 are used for addresses, and group addresses G1-G4 correspond to the 1st and 2nd stations, 3rd and 4th stations, 5th and 6th stations, and 7th and 8th stations. A packet, as shown in figure, to be sent respectively to the 5th and 6th stations receiving a reservation progress frame RPF(G3) is provided, a reservation packet is sent at the same time to cause collision, then the master station outputs respectively a reservation progress frame to each slave station. That is, the reservation progress frame RPF(5) is sent to the 5th station and then the reservation progress frame RPF(6) is sent to prevent further collision.</p> |
