| 摘要 |
A base station system includes an indoor section and a remote radio frequency subsystem (RRS). Said indoor section includes RIU, CCU, BBU and GPSU as well as a local interface unit RRS includes a remote interface unit, a radio frequency transmitting and receiving unit (TRU)and an antenna. Said local interface unit and said remote interface unit can accomplish signal exchange: TRU is a radio frequency transmitting and receiving module of current RFU and can amplify analog radio frequency signal transmitted from remote interface unit and transport it to antenna so as to be transmitted. By selecting flexibly optical fiber cable or intermediate frequency cable connection said interface unit of present invention can provide two pulling mode, i.e. digital baseband pulling and intermediate frequency pulling. Said base station of present invention can reduce station sites of base station save network operating costs on the other hand base station can cover cells with intelligent antennas, accomplish the connection using an optical cable or intermediate frequency cable thus reduce engineering installation difficulty.
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