| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a carrier sense system for spectrum spread frequency hopping wireless data communication that decreases communication errors due to the interference of other radio wave sense systems and that is equipped with a main device having a wireless unit capable of transmitting and receiving a radio wave and a subordinate device having a wireless unit capable of communicating with the main device. <P>SOLUTION: The carrier sense system for spectrum spread frequency hopping wireless data communication whose wireless unit has a frequency varying means for varying a communication frequency every time slot being a specified time and that the frequency varying means has a specified number of frequency channels for varying the communication frequency and it can change the frequency channels in a specified order, every one transmission or one reception. <P>COPYRIGHT: (C)2004,JPO |
