| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical relay system which can reduce an operation burden required for a delay time adjustment. <P>SOLUTION: A base station 1 has a signal transmission (TX) portion 200 which transmits a synchronous signal to an LCX 3-1 and optical fiber transmission lines 4-1-4-n, and phase adjusters 101 and 110 which adjust a phase of a signal transmitted to / received from a mobile station 7 based on phase difference information between the synchronous signal transmitted to the LCX and the synchronous signal transmitted to the optical fiber transmission lines. Relay devices 2-1-2-n have a phase difference detecting portion 800 which detects a phase difference between the synchronous signal received from the relay device in a preceding stage or the base station 1 through the LCX, and the synchronous signal received from the base station 1 through the optical fiber transmission lines, and transmits the phase difference as phase difference information to the relay device in the preceding stage or the base station 1, and phase adjusters 901 and 910 which adjust a phase of a signal transmitted/received between the mobile station 7 and the base station 1 based on the phase difference information received from the phase difference detecting portion 800 of the relay device in a subsequent stage. <P>COPYRIGHT: (C)2008,JPO&INPIT |
