| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a radio communications system capable of performing smoothly and swiftly data processing for transmitting/receiving a data via a repeater.SOLUTION: When a packet transmitted from a slave unit in numerical order is received by a repeater and is transmitted while changing the order to avoid an influence of interference radio waves; and thus, the packet may be received by a master unit in an irregular order. Even when a packet of reception wait number is not received and reception wait number is not updated accordingly, re-transmission request is not issued immediately. When the reception wait number is being updated, an affirmative response is transmitted, and when the reception wait number is not being updated, a negative response requesting a re-transmission is transmitted. It is not required to perform re-transmission processing frequently; thereby occurrence of delay is reduced.</p> |
