BTS - DBS3900 Functional Modules Training.ppt
- 1. 2009/09/07 1 DBS3900 Functional Modules
- 2. 2009/09/07 2 Descriptions on the functional modules • Huawei BBU3900 GSM is the baseband control unit. It provides physical interfaces to the BSC, the RRU3004, and the RRU3008. The BBU3900 manages the entire BTS system centrally, including OM and signaling processing, and provides system clocks. • RRU3008The RRU3008 is the outdoor remote RF unit. It mainly processes baseband signals and RF signals. Each RRU3008 supports eight carriers.
- 3. 2009/09/07 3 In the TMC cabinet
- 4. 2009/09/07 4 In the TMC cabinet
- 7. 2009/09/07 7 DCDU-03B As an auxiliary device of the distributed BTS, the DCDU-03B provides the DC power solution to meet the requirement of rapid network deployment. The DCDU-03B is a DC power distribution box. It provides multiple DC power outputs. Exactly nine DC power Outputs (SW0 – SW8).
- 8. 2009/09/07 8 Installing the BBU Case
- 9. 2009/09/07 9 Appearance of the BBU3900 The typical power consumption of the BBU is 35 W. The weight of the BBU isn’t more than 12KG. Each BBU3900 supports a maximum of 36 TRXs, and 12 cells. The BBU is a small box with all the external ports on the front panel. The BBU3900 boards consist of the UEIU, GTMU, and UELP; the BBU3900 modules consist of the UBFA and the UPEU.
- 10. 2009/09/07 10 The Typical Configuration of the BBU3900.
- 11. 2009/09/07 11 BBU Boards • GTMU Board :The GSM transmission, timing, and management unit for BBU (GTMU) controls and manages the entire BTS. It provides interfaces related to the reference clock, power supply, OM, and external alarm collection.
- 12. 2009/09/07 12 LEDs on the GTMU Panel LED Color Status Description RUN Gree n On The board is faulty. Off There is no power supply or the board is faulty. Blinking once/2s The board is operational. Blinking once/4s The OML link is abnormal. Blinking four times/s The board is loading software. ALM Red On A fault occurs in the running board. Off An alarm is not generated. ACT Gree n On The board is operational. Off The board is faulty. LIU0–LIU3 Gree n On A local E1/T1 alarm is generated. Blinking four times/s A remote E1/T1 alarm is generated. Off This link is not used or the alarm is cleared. CPRI0- CPRI5 Gree n On The CPRI link is functional. Red On The reception of the optical module is abnormal and an alarm is triggered. The RESET button on the GTMU is used to reset the GTMU.
- 13. 2009/09/07 13 DIP Switch of GTMU • The functions of the DIP switches are as follows: • S1 is used to set E1 impedance. • S2 is used to set the grounding of E1/T1 transmission. • S3 is reserved. • S4 is used for the selection of E1 bypass. • S5 is used to set the timeslots when the E1 link is bypassed.
- 14. 2009/09/07 14 DIP Switch of GTMU DIP switch DIP status Description 1 2 SW1 ON ON The E1 impedance is set to 75 Ω. OFF ON The E1 impedance is set to 120 Ω. ON OFF The T1 impedance is set to 100 Ω. DIP switch DIP status Description 1 2 3 4 SW2 ON ON ON ON The E1 cable is grounded. OFF OFF OFF OFF The E1 cable is not grounded. DIP switch DIP status Description 1 2 3 4 SW4 ON ON ON ON The E1 link can be bypassed. OFF OFF OFF OFF The E1 link cannot be bypassed. SW5 ON ON ON ON The E1 link cannot be bypassed. OFF ON ON OFF The E1 link of the Level 1 cascaded BTS can be bypassed. ON OFF ON OFF The E1 link of the Level 2 cascaded BTS can be bypassed. OFF OFF ON OFF The E1 link of the Level 3 cascaded BTS can be bypassed. ON ON OFF OFF The E1 link of the Level 4 cascaded BTS can be bypassed. OFF ON OFF OFF The E1 link of the Level 5 cascaded BTS can be bypassed.
- 15. 2009/09/07 15 UEIU Board • The Universal Environment Interface Unit (UEIU) board. It transmits monitoring signals and alarm signals from external devices to the main control board. The UEIU supports eight Boolean alarm signals and two RS485 environment monitoring signals. Port Type Description MON 0 RJ45 Connector Provides the input and output of the externally collected environment monitoring signals to the GTMU according to the RS485 communications protocol MON 1 RJ45 Connector Reserved EXT- ALM0 RJ45 Connector Transmits the externally collected environment monitoring signals to the GTMU through communications protocol related to the dry contact EXT- ALM1 RJ45 Connector Reserved
- 16. 2009/09/07 16 UPEU Module • The universal power and environment interface unit type A (–48 V) (UPEU) supports the –48 V DC power input, supplies power to the boards, modules, and fan in the BBU, and provides access to multiple environment monitoring signals. • Converting -48 V or +24 V DC to +12 V DC that is applicable to the boards Port Type Description MON0 RJ45 Connector Provides the input and output of the externally collected environment monitoring signals to the GTMU according to the RS485 communications protocol MON1 RJ45 Connector Reserved EXT- ALM0 RJ45 Connector Transmits the externally collected environment monitoring signals to the GTMU through communications protocol related to the dry contact EXT- ALM1 RJ45 Connector Reserved PWR 3V3Power Connector –48V power input
- 17. 2009/09/07 17 Monitoring Ports on the BBU
- 18. 2009/09/07 18 UELP Board • The universal E1/T1 lightning protection unit (UELP) provides lightning protection for four E1/T1 signals. the Universal E1/T1 Lightning Protection Unit (UELP) board. It is an optional board which is installed in the BBU. Port Type Cable Description INSIDE DB25 male connector E1 transfer cable of the BBU Transfers the four E1/T1 signals between the UELP and the GTMU OUTSIDE DB26male connector E1/T1 cables of the BBU Provides the input and output of the four E1/T1 signals between the BBU and the BSC UELP Board provides a DIP switch to set impedance of E1/T1. DIP Switch DIP Status Description 1 2 3 4 SW1 OFF OFF OFF OFF Twisted-pair cable （ 100Ω T1 or 120Ω E1 ） ON OFF ON OFF Coaxial cable （ 75Ω E1 ）
- 19. 2009/09/07 19 UBFA Module • The universal BBU fan unit type A (2U) (UBFA) communicates with the GTMU to regulate the temperature, adjust the fan speed, and report alarms. The UBFA module is hot swappable.It is a mandatory module of the BBU3900 that controls the fan speed and detects the temperature of the fan board. LED Col or Status Description STA TE Gre en Blinking twice per second The board is not securely connected. An alarm is not generated. Re d On An alarm is generated. Gre en Blinking once every two seconds The board operates normally.
- 20. 2009/09/07 20 Installing the BBU Cables Cable connections of the BBU 1 、 The FE cable is used for the IP transmission. 2 、 The E1 cable is used for the HDLC transmission. E1 transfer cable E1cable CPRI signal cable FE transfer cable FE cable Alarm cable Monitoring signal cable Power cable
- 21. 2009/09/07 21 Installing the BBU Cables APMI panel Door status sensor a. Fix the RJ45 connector at one end of the alarm cable to the EXT_ALM1 port on the BBU. b. Connect the two bare terminals X1.4 (blue) and X1.5 (white) to the alarm wiring terminals of the door status sensor. c. Connect the two bare terminals X1.1 (white) and X1.2 (orange) to the OUT1+ and OUT1- alarm wiring terminals on the APMI. d. Connect the two bare terminals X1.3 (white) and X1.6 (green) to the alarm wiring terminals of the DCDU.
- 22. 2009/09/07 22 d Cable Name Appearance PGND cable Power cable CPRI optical cable E1 cable E1 transfer cable Monitoring signal cable between the APMI and the BBU Monitoring signal cable for the DCDU-03B BBU alarm cable FE cable FE transfer cable a Appearance of the Cables
- 23. 2009/09/07 23 EMUA The environment monitoring unit EMUA mainly monitors the environment in a cabinet and processes alarms. The EMUA is connected to the BBU through the alarm cable. It monitors the environment in an equipment room and in a cabinet. The EMUA has the following functions: Monitors the environment by using the temperature and humidity, water immersion, and smoke sensors. Monitors intrusion by using infrared and door status sensors. Monitors power distribution.The DIP switches (SW12A, SW12B, SW24A, SW24B: 8-digit and 4 pcs for each) are used to set alarm levels for 32-channel Boolean input signals (1) Indicator (2) Four ports for analog signal sensors (3) Port for infrared sensors (4) Port for smoke sensors (5) Port for door status sensors (6) Six ports for Boolean signal output (7) 16/32 ports for the detection of Boolean signals (8) Two RS-485 ports (9) Wiring terminal for the power supply (10) Port for humidity/temperature sensors (11) Port for water sensors (12) RS-232 port (13) Grounding screw
- 24. 2009/09/07 24 RRU Installation Fixture assembly for installing the RRU Front of the RRU Back of the RRU Cover plate Attachment plate Main fixture Auxiliary fixture Dual-nut bolt assembly
- 25. 2009/09/07 25 RRU Installation ①CPRI optical cable ② Power cable ③RF jumper ④PGND cable ⑤SFP high-speed cable for cascading ⑥Boolean/RS485 input cable Antenna Antenna Antenna External alarm device External power supply
- 26. 2009/09/07 26 RRU Cable Connections CPRI optical cable Alarm cable Shielding layer of the power cable Power cable First wrap the joint with the waterproof tape, and then wrap the joint with the PVC insulating tape. Grounding bolt OT terminal PGND cable Case 1 RF jumper Waterproofed alarm cable Case 2
- 27. 2009/09/07 27 -48V DC power cable -48V DC power wire GND wire Shielding layer OT terminals Determine lengths of power cables for different operations according to the scales on the inner side of the cover plate of the cabling cavity. Based on the determined length, remove the jacket and shielding layer off the power cable. Add an OT terminal to each wire. Strip a 15 mm jacket off the power cable to reveal the shielding layer of the power cable Remove the jacket from each wire. Making OT Terminals by Using a Cable Peeler (Recommended)
- 28. 2009/09/07 28 RRU work mode Introduction • RRU transmit mode – Transmit combining or independency – PBT – Transmit diversity • RRU receive mode – Receive diversity – Four way receive diversity
- 29. 2009/09/07 29 RRU Transmit Mode-Transmit Combining or Independency • In this mode, two TRXs of RRU are both work. • In this mode, the system will work on the transmit independency or transmit combining mode automatically, according to the power mode and antenna mode. • In transmit independency mode, TRX0 occupies channel A while TRX1 occupies channel B. • In transmit combining mode, the combining signal are transmitted through channel A. Interface Processing Unit DUP DUP CPRI-E CPRI-W Interface Processing Unit DUP DUP CPRI-E CPRI-W
- 30. 2009/09/07 30 RRU Transmit Mode-PBT • In PBT mode, only the first TRX can work. • PBT mode can improve the transmitting power to 40W. • In PBT mode, downlink signal are transmitted through channel A. Interface Processing Unit DUP DUP CPRI-E CPRI-W ANTA ANTB
- 31. 2009/09/07 31 RRU Transmit Mode-Transmit Diversity • In this mode, only the first TRX can work. • Transmit diversity mode can improve signal the quality of downlink signal. • In this mode, the signal from the first TRX will be divided to two channels and be transmitted through channel A and channel B. Interface Processing Unit DUP DUP CPRI-E CPRI-W ANTA ANTB
- 32. 2009/09/07 32 RRU Receive Mode-Main and Diversity • Receive diversity, RRU can work as double TRX mode. • Each TRX can receive the signal from two feeders. • In the following figure ， the TRX gets the receiving signal from channel A and B of the single RRU. • It is also possible for TRX to use the channel A receiver of the other RRU in two RRUs combining solution. Interface Processing Unit DUP DUP CPRI-E CPRI-W ANTA ANTB RX-IN RX_OUT The second receiving diversity signal may come from second RRU
- 33. 2009/09/07 33 RRU Receive Mode-Four Way Receive Diversity • In this mode, only the first TRX can work. • The working TRX gets the uplink signal from four feeders of two RRUs. • Only the antenna mode “Double Antennas, Four Receivers” can support “Four way receive diversity”. Interface Processing DUP CPRI-E CPRI-W ANTA ANTB RX-IN RX_OUT Interface Processing DUP CPRI-E CPRI-W ANTA ANTB RX-IN RX_OUT The other two receiving diversity signal come from second RRU
- 34. 2009/09/07 34 Typical Configuration • S1(Transmit Diversity or Transmit Independency + Receive Mode Main and Diversity ) – Transmit mode should be set to “Transmit Independency or combining” – Receive mode should be set to “Receive diversity”. – Antenna mode should be set to” Double Antenna”. – It also can be configured as non-ring. – The maximum transmit power of RF port: M900: 30W/TRX M1800:20W/TRX. BBU CPRI5 CPRI0 CPRI1 RRU CPRI_E CPRI_W RX-in/out ANT-TX/ RXB ANT-TX/ RXA ANT Same RF cable connection for S1(Transmit Diversity + Receive Mode Main and Diversity )
- 35. 2009/09/07 35 • S2(Transmit Independency or Combining + Receive Mode Main and Diversity) – Transmit mode should be set to “Transmit mode independency or combining”. – Receive mode should be set to “Receive diversity”. – Antenna mode should be set to “Double antenna”. – It also can be configured as non-ring. – The maximum transmit power of RF port: M900: 30W/TRX M1800:20W/TRX BBU CPRI5 CPRI0 CPRI1 RRU CPRI_E CPRI_W RX-in/out ANT-TX/ RXB ANT-TX/ RXA ANT
- 36. 2009/09/07 36 • S2 (PBT + Receive Mode Main and Diversity) – Transmit mode should be set to “PBT”. – Receive mode should be set to “Receive diversit y”. – Antenna mode should be set to “Single antenna and receive diversity”. – The maximum transmit power of RF port: M900: 40W/TRX M1800:30W/TRX RRU CPRI_E CPRI_W RX-in/out ANT-TX/ RXB ANT-TX/ RXA ANT BBU CPRI5 CPRI0 CPRI1 RRU CPRI_E CPRI_W RX-in/out ANT-TX/ RXB ANT-TX/ RXA
- 37. 2009/09/07 37 • S3 or S4 (Transmit Combining + Receive Mode Main and Diversity) – Transmit mode should be set to “Transmit combining or independency” – Receive mode should be set to “Receive diversity” – Antenna mode should be set to “Single antenna and two receive” – The maximum transmit power of RF port: M900: 15W/TRX M1800:10W/TRX RRU CPRI_E CPRI_W RX-in/out ANT-TX/ RXB ANT-TX/ RXA ANT BBU CPRI5 CPRI0 CPRI1 RRU CPRI_E CPRI_W RX-in/out ANT-TX/ RXB ANT-TX/ RXA
- 38. 2009/09/07 38 • S7 or S8 (Transmit Combining + Receive Mode Main and Diversity) – Transmit mode should be set to “Transmit combining or independency”. – Receive mode should be set to “Receive diversity”. – Antenna mode should be set to “Single antenna and two receive”. – Actually It is combined by two S4. – The maximum transmit power of RF port: M900: 15W/TRX M1800:10W/TRX CPR I5 CPRI 0 CPR I1 AN T BBU RR U CPRI_ E CPRI_ W RX- in/out ANT- TX/ RXB ANT- TX/ RXA RR U CPRI_ E CPRI_ W RX- in/out ANT- TX/ RXB AN T RR U CPRI_ E CPRI_ W RX- in/out ANT- TX/ RXB ANT- TX/ RXA RR U CPRI_ E CPRI_ W RX- in/out ANT- TX/ RXB ANT- TX/ RXA