| 摘要 |
<P>PROBLEM TO BE SOLVED: To make a plurality of systems by carriers and communication procedures of the same frequency able to adjacently coexist with a simple constitution in a wireless master-and-slave clock system. <P>SOLUTION: In the wireless master-and-slave clock systems 1 and 2, pieces of time information sent from the master clocks 101 and 201 to each slave clock 102 to 110, and 202 to 210 are sent by a relay method through the slave clocks, a system ID for every system is sent by adding it to the time information, and only time information of one's system is read to be used in time correction. By giving rank to the time information, managing a transmission time zone of each slave clock by the rank, and offsetting the rank in response to the system ID, interference between the plurality of wireless master-and-clock systems is eliminated with a simple constitution, and coexistence of systems is made possible. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
