| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for globally synchronizing clocks of devices in wireless personal area networks. <P>SOLUTION: A method synchronizes a transmit clock of a transmitter with a receive clock of a receiver in a wireless communications network. Times t1, t2, t3, and t4 of the transmit clock correspond to times t1', t2', t3', and t4' of the receiver clock. A synchronization message is generated in a media access control layer of the transmitter at the time t1. The time t1 is inserted in the synchronization message when the synchronization message is passed from the media access layer to a physical layer at the time t2. Then, the synchronization message including the time t1 is broadcast. The synchronization message is received from the physical layer in the receiver, at which time the time t3' is obtained. The received message is passed to a media access control layer of the receiver, and the receive clock is adjusted by adding the time t1-t3' to the current time of the receive clock. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
