| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that a communication system including a relay station 8 relaying communication between a mobile station and a base station 1 through a leakage coaxial cable (LCX) and an optical fiber, the communication system having a problem of a difference in delay time between communication via the optical fiber 9 and communication via the LCX 300-1, and a momentary break of communication between the mobile station and base station. <P>SOLUTION: A base station 1 transmits a delay adjustment signal through the LCX 300-1 and optical fiber 9, and a relay station 8 receives the delay adjustment signal arriving through the LCX 300-1 and optical fiber 9, and generates a beat signal from the delay adjustment signal. A beat frequency f1 is known from the beat signal, so that the delay time difference is further calculated using modulation repetition cycles T and a modulation width β. <P>COPYRIGHT: (C)2012,JPO&INPIT |
