Upon completion of this course, students will learn about the functions, hardware structure, and cable connections of BTS (Base Transceiver Station). The document provides an overview of BTS system components and signal processing. It also describes the typical BTS configuration and introduces the main hardware components of the BTS3012 cabinet, including their functions.

3. Location MS: Mobile Station BTS: Base Transceiver Station BSC: Base Station Controller HLR: Home Location Register AUC: Authentication Center EIR: Equipment Identity Register MSC: Mobile Switching Center VLR: Visitor Location Register SMC: Short Message Center VM: Voice Mailbox OMC: Operation and Maintenance Center PSTN ISDN PSPDN Um Interface BTS3012 BTS3012 BTS3012 BTS3012 OMC HLR/AUC/EIR BSC MSC/VLR SMC/VM A Interface MAP MAP TUP,ISUP MS MS MS

7. Hardware structure TMA TMA DTRU DAFU Antenna and feeder subsystem Forepart of RF Subsystem TMA TMA DTRU DAFU TMA TMA DTRU DAFU Double transceiver subsystem DATU Um Interface DATU fiber E1 Abis Interface Common subsystem Metro 100 DTMU DEMU E1 BITS Monitor TBUS/DBUS/CBUS MS FH_BUS Extension cabinet DBUS/ TBUS CBUS CBUS3 CBUS3 CBUS3 CBUS3 CBUS2 CBUS2 CBUS2 CBUS3 CBUS3 Protection for signal Electric tilt antenna & TMA feed Electric tilt antenna & TMA feed Electric tilt antenna &TMA feed CBUS3 FH_BUS FH_BUS RF signal RF signal RF signal

8. BTS3012 Cabinet and Boards Double transceiver subsystem Common Subsystem Antenna Front-End of the RF Subsystem (DAFU) Cabinet Top Access Subsystem (DCTB) D D D D Wiring & Air Inlet Wiring D D P U D C O M D C O M D D P U D C O M D T R U D T R U D T R U D T R U D T R U D T R U Wiring FAN Air Inlet M L C Power and E MC Transmission Unit D D P U E L C E L C S A C Transmission Unit D T M U D T M U D E M U D C C U D C S U D A T U

9. BTS3012 Cabinet and Boards Double transceiver subsystem Common Subsystem Antenna Front-End of the RF Subsystem (DAFU) Cabinet Top Access Subsystem (DCTB) D D D D Wiring & Air Inlet Wiring D D P U D C O M D C O M D D P U D C O M D T R U D T R U D T R U D T R U D T R U D T R U Wiring FAN Air Inlet M L C Power and E MC Transmission Unit D D P U E L C E L C S A C Transmission Unit D T M U D T M U D E M U D C C U D C S U D A T U

10. Structure of DTMU MCK OML DBUS CBUS2 Clock BIU DTRU DTMU BSC MCU MMI LMT Abis External synchronized clock Subrack number and clock

16. The interfaces on the DCCU panel Silk-Screen Type Description TRAN MD64 (female) For E1 signal input To_FAN DB26 (female) Connects to the fan panel through cables TO_TOP1 MD64 (female) Connects to the cabinet top subrack through cables POWER 3V3 For power input of the common unit

18. BTS3012 Cabinet and Boards Double transceiver subsystem Common Subsystem Antenna Front-End of the RF Subsystem (DAFU) Cabinet Top Access Subsystem (DCTB) D D D D Wiring & Air Inlet Wiring D D P U D C O M D C O M D D P U D C O M D T R U D T R U D T R U D T R U D T R U D T R U Wiring FAN Air Inlet M L C Power and E MC Transmission Unit D D P U E L C E L C S A C Transmission Unit D T M U D T M U D E M U D C C U D C S U D A T U

23. BTS3012 Cabinet and Boards Double transceiver subsystem Common Subsystem Antenna Front-End of the RF Subsystem (DAFU) Cabinet Top Access Subsystem (DCTB) D D D D Wiring & Air Inlet Wiring D D P U D C O M D C O M D D P U D C O M D T R U D T R U D T R U D T R U D T R U D T R U Wiring FAN Air Inlet M L C Power and E MC Transmission Unit D D P U E L C E L C S A C Transmission Unit D T M U D T M U D E M U D C C U D C S U D A T U

27. Indicators on DTRU Indicator Color Description Status Meaning RUN Green Indicates the running and power-on of the DTRU On There is power supply or the board is faulty. Off There is no power supply and the board is faulty. Slow flash (0.25 Hz) The board is starting. Slow flash (0.5 Hz) The board is running. Fast flash (2.5 Hz) The DTMU is sending configuraiton parameters to the DTRU. ACT Green Indicates the TRX is working On The board is running (the DTMU sends configuration parameters to the DTRU correctly and the cell is starting). All the channels on the two carriers can work normally. Off Communication between DTRU and DTMU is not set up Slow flash (0.5Hz) Only parts of the logic channels are working normally (including after TRX mutual aid). ALM Red Indicates alarm On (including high-frequency flash) Critical alarm occurs to the board. Off The board is normal. RF_IND Red RF interface indicators On Standing wave alarm Off Normal Slow flash (0.5 Hz) RL alarm

30. No combining TCOM TRX0 TX TRX1 TX TX1 IN1 IN2 TX2 RXM1 RXD1 RXM2 RXD2 combiner

31. Diversity transmitter TRX1 TRX0 TX TX TX1 IN1 TCOM IN2 TX2 Man made multi way combiner

32. Power booster technology TRX1 TRX0 TX TX TX1 IN1 TCOM IN2 TX2 Same phase combiner

33. Wide band combining TRX0 TX TRX1 TX TX1 IN1 TCOM IN2 TX2 combiner

35. Independent receiver TRX1 TRX0 TX TX TX1 IN1 TCOM IN2 TX2 RXM1 RXD1 RXM2 RXD2 divider combiner divider

36. Dividing receiver TRX0 TX TRX1 TX TX1 IN1 TCOM IN2 TX2 RXM1 RXD1 RXM2 RXD2 combiner divider divider

37. Four diversity receiver TRX0 TX TRX1 TX divider divider TX1 IN1 TCOM IN2 TX2 RXM1 RXD1 RXM2 RXD2 combiner

38. Intra structure of DTRU TRX0 TX TRX1 TX TX1 IN1 TCOM IN2 TX2 RXM1 RXD1 RXM2 RXD2 combiner divider divider

40. BTS3012 Cabinet and Boards Double transceiver subsystem Common Subsystem Antenna Front-End of the RF Subsystem (DAFU) Cabinet Top Access Subsystem (DCTB) D D D D Wiring & Air Inlet Wiring D D P U D C O M D C O M D D P U D C O M D T R U D T R U D T R U D T R U D T R U D T R U Wiring FAN Air Inlet M L C Power and E MC Transmission Unit D D P U E L C E L C S A C Transmission Unit D T M U D T M U D E M U D C C U D C S U D A T U

43. Functional structure of the DDPU ANTB TXA TXB RXA4 duplexer divider duplexer divider ANTA RXA1 RXA2 RXA3 RXB1 RXB2 RXB3 RXB4

47. DL Signal Flow DDPU Um BSC BTS3012 Cabinet MS Antenna Feeder Abis DTRU DTMU

49. UL Signal Flow DAFU Um BSC BTS3012 Cabinet MS Antenna Feeder Abis DTRU DTMU

51. Signaling Processing Signal Flow BTS3012 DDPU DTRU DTMU BSC Abis

53. Clock Signal Flow DTMU Boards in main cabinet Boards in slave cabinet A-bis Clock distribution cable between cabinets

56. Antenna Feeder subsystem Antenna Feeder Jumpers TMA

58. Lightning Arrester Lightning Arrester is used to prevent the equipment from being damaged by the lightening current inducted by the core line of the feeder f eeder jumper Lightning Arrester

66. Thank You