| 摘要 |
PROBLEM TO BE SOLVED: To transmit a plurality of data packets in a short time from a master station to a plurality of slave stations and also to surely send all the data packets. SOLUTION: When a master station 11 sends data packets PK1 , PK2 ,...PKn-1 and PKn to each slave station 21 to 41, the master station continuously broadcasts data packets to each slave station. It sends question signals Q1 to Q3 to each slave station, receives responses A1 to A3 that notify receiving results from each station and recognizes which data packet is not correctly received. The master station continuously broadcasts the data packets that are not correctly received to each slave station again and also sends question signals and receives responses from each slave station. After that, it repeats this operation until each slave station receives all the data packets. |
