| 摘要 |
A radio base station BTS according to the present invention includes a timing adjustment unit 15 configured to adjust transmission timing of the frame to be transmitted by a second synchronous signal transmission unit, 12 based on processing delay time in the relay device 10 and round-trip time RTT of the radio equipment device RE at the relay device 10, and the radio equipment controller REC#1, #2 are configured to calculate round-trip time RTT of the radio equipment device RE at the radio equipment controller REC#1, #2, based on a difference T14 between transmission time of the first synchronous signal R1 and reception time of the fourth synchronous signal R4. |
