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8/13/2019 Ome501103 Huawei Dbs3900 Hardware Structure Issue2.00
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www.huawei.com
Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
HUAWEI DBS3900
Hardware Structure
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Page2Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
References
31182993-DBS3900 GSM Documentation
DBS3900 GSM Technical Description
BBU3900 GSM User Guide
RRU3004 User Guide
RRU3008 User Guide
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Objectives
Upon completion of this course, you will be able to:
Know the functions of DBS3900
Grasp the hardware structure of DBS3900
Grasp the functions of the RRU3004 and RRU3908
Master typical configuration of DBS3900
Know the networking topology of DBS3900
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Contents
1. DBS3900 Overview
2. DBS3900 Hardware Components
3. DBS3900 Typical Configuration
4. DBS3900 Networking Topology
5. RRU3008 Introduction
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Page5Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
DBS3900 Location
PSTN
ISDN
PSPDN
Um Interface
DBS3900
DBS3900
DBS3900
DBS3900
OMC
HLR/AUC/EIR
BSC
MSC/VLR
SMC/VM
A Interface
MAP
MAP
TUP,ISUPMS
MS
MS
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 DBSDistributed Base Station
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Page6Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Functions and Features
Suitable for various environments, flexible installation
Support PGSM900MEGSM900 DCS1800M
One RRU module can support 2 TRXs
One BBU can support 36TRX at most and 12 cells atmost
BBU support star, tree, chain and ring topology
Low Power Consumption and Energy-Saving
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Page7Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Functions and Features
Simple Structure and Quick Network Deployment
Flexible Installation and Diversified Scenarios
Cell broadcasting service and point-to-point short
message Support transmit diversity
Support PBT
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Page8Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. DBS3900 Overview
2. DBS3900 Hardware Components
3. DBS3900 Typical Configuration
4. DBS3900 Networking Topology
5. RRU3008 Introduction
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Page9Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
DBS3900 Basic Structure
DBS3900 is mainly composed of BBU and RRU, optical fiber is adopted between
BBU and RRU
RRU is categorized into two types: DC RRU and AC RRU. The DC RRU supports
DC power inputs and the AC RRU supports AC power inputs. Both the DC RRU and
AC RRU have the RRU3004 and RRU3008 models.
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Page10Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Contents
2. DBS3900 Hardware Components
2.1 BBU hardware structure
2.2 RRU hardware structure
2.3 Auxiliary Devices
2.4 Application Scenarios
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Page11Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
BBU
The typical power consumption of BBU is 35W
The weight of the BBU is 12 kg at most
All the boards can be inserted from the front panel
The permissible range of power input is 38.4 V DC to 57 V DC
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Page12Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Working Principles of the BBU
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Page13Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Boards and Modules in BBU
BSBC: The universal BBU Subrack Backplane type C
GTMU: The GSM Transmission, Timing and Management Unit
UBFA: The Universal BBU Fan unit type A
UPEU: The Universal Power and Environment interface Unit
UELP: The Universal E1/T1 Lightning Protection unit
UEIU: The Universal Environment Interface Unit
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Page14Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
BSBC Board
The BSBC provides slot 6 for the GTMU, slot 7 for a main control board
that supports 3G, and slots 0 to 5 as common slots. The GTMU is 1 U
high. Therefore, from the view of the front panel, the GTMU is located in
slots 5 and 6
Provide backplane interfaces, communication channels, distribute clock
signal and +12V power supply for the other boards
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Page15Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
GTMU 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 monitoring, OM,
and external alarm collection.
Distributes and manages BTS clock signals
Provides the Ethernet port for terminal maintenance
Supports four routes of E1 inputs
Provides the CPRI ports for communication with the DRFU
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Page16Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
GTMU Ports
LabelConnector
TypeDescription
CPRI0-
CPRI5SFP
Ports for the communication between the BBU and the RF module;
support input and output of the optical and electrical signal .
ETH RJ45 Port for local maintenance and commissioning
FE0 RJ45
A reserved port that performs the following function:
Connects the BBU to a routing device in the equipment room through
the Ethernet cable to transmit network information.
FE1 DLC
A reserved port that performs the following function:
Connects the BBU to a routing device in the equipment room through
the optical cable to transmit network information.
USB USBA reserved port that performs the following function:
Enables the automatic software upgrade from a USB disk.
TST USB Provids a reference clock for the tester.
E1/T1DB26
female
Provides the input and output of the four E1/T1 signals between the
GTMU and the UELP or between the GTMU and the BSC.
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Page17Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
GTMU IndicatorsLED Color Status Description
ON The board is faulty.
OFF No power supply is available or the board is faulty.
ON for 1s, OFF for 1s The board is operational.
ON for 2s, OFF for 2s The OML link is abnormal.
ON for 0.125s
OFF for 0.125sThe board is loading software.
ON A fault occurs in the running board.
OFF No alarm is generated.
ON The board is operational.
OFF The board is faulty.
ON This link is not used.
ON for 0.125s
OFF for 0.125s
A remote E1/T1 alarm is generated.
OFF This link is operational.
Green ON The CPRI link is normal.
Red ONThe reception of the optical module is abnormal and an alarm
is generated.
CPRI0-
CPRI5
LIU0-LIU3 Green
ACT Green
ALM Red
RUN Green
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Page18Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
UELP
UELP is the E1/T1 signal lightening protection unit of BBU and it
can provide protection for 4 route E1/T1 signal
Port Type Relative cables Description
INSIDE DB25 male E1 transferringcable
Transfers the four E1/T1
signals between the UELP andthe GTMU
OUTSIDE DB26 male E1/T1 cable
Provides the input and output
of the four E1/T1 signals
between the BBU and the BSC
GTMU
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Page19Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
UPEU
The universal power and environment interface unit (UPEU) supports the -
48V /-24V DC power input, supplies power to the boards, modules, and fan
in the BBU, and provides access to multiple environment monitoringsignals
Port Type Description
MON0 RJ45
Transmitting two RS485
environment monitoring signals
MON1 RJ45Transmitting two RS485
environment monitoring signals
EXT-
ALM0RJ45
Transmitting four dry contact
alarms
EXT-
ALM1RJ45
Transmitting four dry contact
alarms
PWR 3V3 +24 V/-48 V DC power input
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Page20Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
UEIU
UEIU is the environment interface board of BBUit can support
multi-route monitoring signal input
UEIU is optional and is only used when more ports are needed
LabelConnector
TypeDescription
MON0 RJ45 One RS485 signal
MON1 RJ45 One RS485 signal
EXT-
ALM0RJ45
Four dry contact
signals
EXT-
ALM1RJ45
Four dry contact
signals
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Page21Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Monitoring System
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Page22Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
USCU
The Universal Satellite Card and Clock Unit (USCU) is compatible with six types
of satellite card, provides absolute timing information and the 1 Pulse Per
Second (PPS) reference clock for the main control board, and provides the
RGPS ports and BITS port.
Port Description
1 GPS port Used for receiving GPS signals
2 RGPS ports Used for receiving RGPS signals
3 BITS portConnected to the BITS clock; supporting adaptive input
of the 2.048 MHz and 10 MHz clocks
4 TEST port Used for testing the clock
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Page23Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
UBFA
The universal BBU fan unit type A (2U) (UBFA) works with the air inlet box of
the cabinet to form a ventilation circuit, thus cooling the entire cabinet
The UBFA module communicates with the GTMU to regulate the temperature,adjust the fan speed, and report alarms. The UBFA module is hot swappable
Label Color Status Description
0.125s ON,0.125s OFF
(Green)
The module is not registered, and
no alarm is reported.
1s ON, 1s
OFF (Green)The module is running properly.
1s ON, 1s
OFF (Red)The module is reporting alarms.
OFFThe module is powered off or the
program is not loaded.
STAT
E
Red
/Green
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Page24Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
BBU Cables Connection
BBU cables connection between BBU, BSC, RFU and
Auxiliary equipment
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Page25Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
BBU Hardware structure-Review
Please fill the boards name in the blank of the BBU
panel
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Page26Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Contents
2. DBS3900 Hardware Components
2.1 BBU hardware structure
2.2 RRU hardware structure
2.3 Auxiliary Devices
2.4 Application Scenarios
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Page27Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU
RRU handles modulation and demodulation between
baseband signals and RF signals, data processing, and
combining-distribution. There are two kinds RF Unit,
RRU3004 and RRU3008
RRU3004 can support a maximum of two TRXs.
RRU3008 can support a maximum of eight TRXs.
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Page28Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3004 Module
The RRU3004, a remote radio
unit designed on the basis of
double-transceiver technology,
mainly applies to the small or
medium-capacity sites.
RRU3004 module can support a
maximum of two TRXs.
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Page29Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3004 Functions
The direct IQ modulation technique, which is directly implemented
in the transmit channel, modulates the baseband signals into GSM
RF signals. After being filtered and amplified, the RF signals are
transmitted to the antenna for transmission, through the duplexer
in the RF front-end unit.
The uplink RF signals received from the antenna go through
down-conversion, amplification, analog-to-digital conversion,
matched filtering, Automatic Gain Control (AGC), and then are
sent to ASIC and DSP for demodulation and decoding.
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Page30Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Logical Structure of the RRU3004
RXM_OUT: RRU RX main output for RRU
cascading
RXD_IN: RRU RX diversity input for RRU
cascading
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Page31Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3004 Module
The RRU module has a
bottom panel, a cabling
cavity panel, and an areaattached with LEDs.
Provides - 48VDC power
supply.
1 Bottom panel
2 Cabling cavity panel
3 LEDs
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Page32Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3004 Ports
Item Label Description
RX_IN/OUT Interconnection ports for RF signals
RET RET antenna port
ANT_TX/RXA RF TX/RX port A
ANT_TX/RXB RF TX/RX port B
RTN+
NEG-Power wire post
TX RX
CPRI_EEastern optical port
TX RX
CPRI_WWestern optical port
EXT_ALM Alarm Port
RST Hardware reset buttonTST VSWR Test button for VSWR alarms
TST CPRI Test button for the CPRI port
Cabling cavity
panel
Bottom panel
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Page33Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3004 LEDsLED Colo
rStatus Description
ON The RRU is faulty.
OFF No power input is available.1s ON,1s
OFF
The RRU runs properly.
ON for 0.25s
OFF for 0.25sThe software is being loaded.
ON or
Blinking
(1s ON, 1s
OFF)
The RRU is faulty and reporting alarms.
OFF No alarm is generated.
ON The RRU runs properly.
OFF The connection to the BBU is not established.
OFF No VSWR alarm is generated.
1s ON1s OFF
A VSWR alarm is generated on the ANT_TX/RXBport.
ONA VSWR alarm is generated on the ANT_TX/RXA
port.0.125s ON
0.125s OFF
A VSWR alarm is generated on the ANT_TX/RXA
and ANT_TX/RXB ports.
VSWR
TX_AC
T
Red
ACTGree
n
ALM Red
RUNGree
n
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Page34Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3004 LEDs
Green The CPRI link is functional.
RedThe reception of the optical module is
abnormal and an alarm is generated.Blinking red
0.25s ON, 0.25s
OFF
The CPRI link has a loss-of-lock error.
OFFThe SFP module is not in position or
the optical module is powered off.
Green The CPRI link is functional.
RedThe reception of the optical module is
abnormal and an alarm is generated.Blinking red
0.25s ON, 0.25s
OFF
The CPRI link has a loss-of-lock error.
OFFThe SFP module is not in position or
the optical module is powered off.
CPRI_E
(eastward
CPRI LED)
Red or
green
CPRI_W(westward
CPRI LED)
Red or
green
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Page35Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3004
RRU3004 consists of 2 RRU modules
The maximum weight of 1 RRU module is 15 Kg. it can be installed on the
wall, pole, tower and stand
-48DC power is adopted
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Page36Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
DC RRU3004
DC RRU3004 support -48V input
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Page37Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
AC RRU3004
AC RRU3004 support 220VAC input
C t t
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Page38Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Contents
2. DBS3900 Hardware Components
2.1 BBU hardware structure
2.2 RRU hardware structure
2.3 Auxiliary Devices
2.4 Application Scenarios
A ili D i
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Page39Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Auxiliary Devices
To meet the customer requirements of backup power or
installation space for transmission devices, Huawei provides
suitable auxiliary devices
The auxiliary devices provided by Huawei for the DBS3900
are the Advanced Power Module (APM30), Battery Backup
Cabinet (BBC), and Transmission Cabinet (TMC)
Characterized by the compact structure and stackable
design, the APM30, BBC, and TMC are easy to transportand applicable to outdoor installation scenarios
APM30 O i
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Page40Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
APM30 Overview
The APM30 provides 48V DC
power and power backup for the
distributed base stations and
mini base stations, and provides
space for the user equipment. It
also performs functions such as
battery management and
monitoring, and lightening
protection.
1. Filler panel (1U)2. Power subrack (3U)
3. DC PDU (2U)
4~8. 1U Filler panel
9. Space for batteries (3U)
BBC O i
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Page41Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
BBC Overview
The BBC is installed if long-
time power backup is required.
Small sized and easy totransport, the BBC is
adaptable to outdoor
environments. In addition, theBBC can dissipate heat in
direct-ventilation mode.
The BBC provides amaximum DC backup power
of 48 V 184 Ah through the
built-in batteries
IBBS Overview
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Page42Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
IBBS Overview
The IBBS is developed as an auxiliary product for
Huawei outdoor BTS. The IBBS provides backup
power to meet the requirements for fast network
deployment in high temperature areas.
Output power: providing 48 V DC power supply
Backup power mode: parallel connection between
batteries
Temperature control: built-in air conditioner
Alarm system: monitoring the door control, smoke,
and temperature alarms
TMC O i
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Page43Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
TMC Overview
The TMC is configured if
more transmission space is
required. Small sized andeasy to transport, the TMC
is adaptable to outdoor
environments. The TMC
dissipates heat through the
breathable film and fans.
The BBU3900 can be
installed in the TMC
Contents
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Page44Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Contents
2. DBS3900 Hardware Components
2.1 BBU hardware structure
2.2 RRU hardware structure
2.3 Auxiliary Devices
2.4 Application Scenarios
DBS3900 Application Scenarios
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Page45Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
pp
BBU+RRU+APM APM can supply -48VDC power to BBU and RRU, and can supply space for
transmission equipment and batteries
DBS3900 Applications
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Page46Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
DBS3900 Applications
DBS3900 can provide solutions to the coverage in multiple scenarios
such as in urban and rural areas, in buildings, or along highways and
railways.
Contents
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Page47Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. DBS3900 Overview
2. DBS3900 Hardware Components
3. DBS3900 Typical Configuration
4. DBS3900 Networking Topology
5. RRU3008 Introduction
Contents
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Page48Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Contents
3. DBS3900 Typical Configuration
3.1 RRU3004 Working Mode
3.2 RRU3004 Typical Configuration
RRU3004 Internal Structure
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Page49Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3004 Internal Structure
2 TRXs and 2 duplexers are integrated in RRU module which can be
connected to antenna directly
The RX_IN/OUT port of RRU can support the receiving signal interconnection
between 2 RRUs, so that it can support the diversity receiving between 2RRUs
Inte
rfaceProcessing
Unit
DUP
DUP
CPRI-E
CPRI-W
ANTA
ANTB
RX-IN
RX_OUT
RRU3004 Antenna Mode
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Page50Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3004 Antenna Mode
Single Feeder
Single Feeder (1TX + 1RX), for one module configuration
Single Feeder (1TX + 2RX), for two modules configuration
Double Feeder
Double Feeder (1TX + 1RX), for one module configuration
Double Feeder (1TX + 2RX), for one module configuration
Double Feeder (2TX + 2RX), for one module configuration
Double Feeder (2TX + 4RX), for two modules configuration
RRU Single Feeder
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Page51Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU Single Feeder
1TX+1RX 1TX+2RX
TX/RX RXTX/RX
RRU Double Feeder
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Page52Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU Double Feeder
1TX+1RX 1TX+2RX
RXTX RXTX/RX
RRU Double Feeder
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Page53Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU Double Feeder
2TX+2RX 2TX+4RX
TX/RX RXTX/RX RXTX/RXTX/RX
RRU3004 Transmit Mode and Receive
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Page54Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Mode
RRU3004 Transmit mode
Transmit independency
Transmit combining
PBT
Transmit diversity
RRU3004 receive mode
Main and diversity
RRU3004 Transmitting Mode -
T it I d d
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Page55Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Transmit Independency
In independency mode, TRX 0 occupies channel 1 while TRX1
occupies channel 2
CPRI0
CPRI1
In
terface
ProcessingUnit
ANT1
ANT2
DUP
DUP
RRU3004 Transmitting Mode - transmit
bi i
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Page56Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
combining In transmit combining modethe two TRXs will be combined and
transmitted through channel 1
CPRI0
CPRI1
In
terface
Proce
ssingUnit
ANT1
ANT2
DUP
DUP
RRU3004 Transmitting Mode -
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Page57Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
PBT In PBT mode, only the first TRX can work PBT mode can improve the transmitting power to 40W
In PBT modeonly channel 1 is used by downlink signal
CPRI0
CPRI1
In
terface
ProcessingUnit
ANT1
ANT2
DUP
DUP
RRU Transmitting Mode - Transmit
Di it
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Page58Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Diversity In this mode, only the first TRX can work
Transmit diversity mode can improve the quality of downlink signal
In this modethe signal from the first TRX will be divided to 2 channel
and be transmitted through channel 1 and channel 2
CPRI0
CPRI1
Interface
ProcessingUnit
ANT1
ANT2
DUP
DUP
Question
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Page59Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Q
When configuring Transmit Mode, Transmit Independency
or Combining can be chosen. How can we know whether
Transmit Independency or Transmit Combining is used?
It will be decided by antenna mode. When 2 TRXs are used
in one DRFU,
If the antenna mode is Single antenna or Double
antenna(1TX), the transmit mode must be Transmit
Independency
If the antenna mode is Double antenna(2TX), the transmit
mode must be Transmit Combining
RRU Receiving Mode - Main and
Diversity
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Page60Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Diversity In this modeboth of the 2 TRXs can work
Each TRX receives the signal from 2 feeders
In the following figurethe TRX get the receiving signal from channel A
and B of the single RRU
It is also possible for TRX to use the channel 1 receiver of the other RRU
in 2RRUs combination solution
From RX-in, TRXcan also use the
channel A of the
other RRU, so
channel B of the
two RRUs are
canceled
CPRI0
CPRI1
Interf
ace
Processin
gUnit
ANT1
ANT2
DUP
DUP
RX-IN
RX_OUT
Combination Solution of 2 RRU3004s
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Page61Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
2 RRUs are combined to share receive and transmit channels so that the configurationis more flexible. In the following figure, the cable between CPRI_W and CPRI_E are used for the
TRX baseband signal interconnection, while RX_IN/OUT is only used for 2 way receiving diversity
between 2RRUs.
Interface
ProcessingUn
it
DUP
DUP
CPRI-E
CPRI-W
ANTA
ANTB
RX-IN
RX_OUT
Int
erface
ProcessingUnit
DUP
DUP
CPRI-E
CPRI-W
ANTA
ANTB
RX-IN
RX_OUT
Contents
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Page62Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
3. DBS3900 Typical Configuration
3.1 RRU3004 Working Mode
3.2 RRU3004 Typical Configuration
RRU3004- S1/S2
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S1 Configuration
Transmit mode: Transmit diversity
Receive mode: Main and diversity
Antenna mode: Double
antennas(2TX+2RX)
S2 Configuration
Transmit mode: Combining or
independency
Receive mode: Main and diversity
Antenna mode: Doubleantennas(1TX+2RX)
RRU3004 - S4
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S4 Configuration
Transmit mode: Combining
Receive mode: Main and
diversity
Antenna mode: Single antenna
(1TX+2RX)
RRU3004 S6
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Page65Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
S6 Configuration
Transmit mode: Combining
Receive mode: Main and
diversity
Antenna mode:
RRU0: Single antenna
(1TX+2RX)
RRU1: Single antenna
(1TX+2RX)
RRU2: Double antenna
(1TX+2RX)
Contents
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Page66Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
1. DBS3900 Overview
2. DBS3900 Hardware Components
3. DBS3900 Typical Configuration
4. DBS3900 Networking Topology
5. RRU3008 Introduction
DBS3900 Networking Topology
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BBU networking topology
Star, tree, chain and ring networking topology can be adopted
between BBU and BSC
E1/T1 transmission mode can be used between BBU and BSC or
transmission devices. Optical fiber or Ethernet cable can also be
adopted between BBU and router devices to take the place of E1/T1
based on the support of the software version RRU networking topology
Star, chain and ring networking topology can be adopted between
BBU and RRU Optical fiber is used between RRU and BBU
BBU Networking Topology
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Page68Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Star, tree, chain and ring networking topology can be
adopted between BBU and BSC
BSCChain modeTree
mode
Star mode
Ring mode
BBU
BBU
BBU
BBUHUB
BTS
RRU Networking Topology
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Page69Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Star, chain and ring networking topology can be adopted between
BBU and RRU
BSC
Star mode
Ring mode
Chain mode
BBU
BBU
BBU
RRU
RRU
RRU
Contents
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Page70Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
1. DBS3900 Overview
2. DBS3900 Hardware Components
3. DBS3900 Typical Configuration
4. DBS3900 Networking Topology
5. RRU3008 Introduction
Contents
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Page71Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
5. RRU3008 Introduction
5.1 RRU3008 Hardware Structure
5.2 Configuration Principle
5.3 Typical Configuration
Function of RRU3008
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Page72Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3008 (GSM Remote Radio Filter Unit) is an outdoor
remote RF unit. It processes baseband signals and RF
signals
RRU3008 performs modulation and demodulation between
baseband signals and RF signals, processes data, and
combines and divides signals
One RRU3008 module based on multi-carrier technology
supports eight carriers
Multi-carrier Technology
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Page73Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
The principle of multi-carrier technology: multiple carriers share one power
amplifier and one RF channel.
Baseband pool replaced independent baseband unit. Improve the
integration.
Digital IF combination replaced Analog RF combination. There isnt
combination loss.
Single-carrier Technology Multi-carrier Technology
Appearance of RRU3008
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DC RRU3008 AC RRU3008
TYPE Height (mm) Width (mm) Depth (mm)
DC RRU3008 485 380 210
AC RRU3008 485 380 250
Logical structure of RRU3008
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The RRU3008 consists of the High-speed Interface Unit, Signal
Processing Unit, Power Amplifier (PA), Dual Duplexer, and Low
Noise Amplifier (LNA).
DC RRU3008
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Page76Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
No. description
a LED
b Cabling cavity panel
c Bottom panel of the DC
RRU
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Ports of RRU3008RX_IN/OUT
1 2
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Page78Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
1Cabling cavity panel
2Bottom panel of the DC RRU
TX RX CPRI_E
TX RX CPRI_W
ANT_TX/RXA
ANT_TX/RXB
Item Label Description
RX_IN/OUT RF interconnection port
RET RET antenna port
ANT_TX/RXA RF TX/RX port A
ANT_TX/RXB RF TX/RX port B
RTN+
NEG-Power wiring post
TX RX
CPRI_E
Eastward optical/electrical
port
TX RX
CPRI_W
Westward optical/electrical
port
EXT_ALM Alarm port
RST Hardware reset button
VSWRTest button for VSWR
alarms
Cabling
cavity
panel
Bottom
panel of the
DC RRU
LEDs of RRU3008
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Page79Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Label Color Status Meaning
ON The board is faulty or undergoing version verification.
OFF No power input is available.
ON for 1s and OFF for 1s The board is operational.
ON for 0.25s and OFF for 0.25s The software is being loaded.
ON for 0.25s and OFF for 0.25sThe alarms (excluding VSWR related alarms) are
reported.
OFFNo alarms (excluding VSWR related alarms) are
reported.
ON The board is operational.
OFF No power input is available.
ON (red)The power amplifier is not operational. VSWR alarms
are reported from the ANT_TX/RX port.
ON for 0.25s and OFF for 0.25s
(red)
The power amplifier is operational. VSWR alarms
reported from the ANT_TX/RX port are being held.
OFF No VSWR alarms are reported.
VSWR Red
TX_ACT Green
ALM Red
RUN Green
LEDs of RRU3008
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Page80Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Label Color Status Meaning
ON (green) The CPRI link is functional.
ON (red)The reception of the optical module is
abnormal and an alarm is generated.
ON for 0.25s and OFF for
0.25s (red)
The CPRI link has a loss-of-lock
error.
OFF
The SFP is out-of-position or the
optical
module is powered off.
ON (green) The CPRI link is functional.
ON (red)The reception of the optical module is
abnormal and an alarm is generated.
ON for 0.25s and OFF for
0.25s (red)
The CPRI link has a loss-of-lock
error.
OFF
The SFP is out-of-position or the
optical
module is powered off.
CPRI_E
(eastward
CPRI LED)
Red/gree
n
CPRI_W
(westward
CPRI LED)
Red/green
Contents
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Page81Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
5. RRU3008 Introduction
5.1 RRU3008 Hardware Structure
5.2 Configuration Principle
5.3 Typical Configuration
RRU3008 Antenna Mode
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Page82Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
Single Feeder
Single Feeder (1TX + 1RX)
Single Feeder (1TX + 2RX)
Double Feeder
Double Feeder (1TX + 1RX)
Double Feeder (1TX + 2RX)
Double Feeder (2TX + 2RX)
Double Feeder (2TX + 4RX)
Transmit Mode and Receive Mode of
RRU3008
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Page83Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3008 Transmit Mode
Transmit independency or combining
RRU3008 Receive Mode
Main diversity receiver
Limitation of RRU3008
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Page84Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
RRU3008 supports whole frequency band of PGSM 900MHz,
850MHz, high 40MHz frequency band and low 40MHz frequency
band of 1900MHz Instantaneous frequency bands of one TX channel: 12.5MHz.
Instantaneous bandwidth of one RX is 25MHz
RRU3008 DL UL
Whole 25MHz frequency band of 900MHz 935-960MHz 890-915MHz
Whole frequency band of 850MHz 869-894MHz 824-849MHz
Low 40MHz of 1900MHz 1930-1970MHz 1850-1890MHz
High 40MHz of 1900MHz 1950-1990MHz 1870-1910MHz
Basic configuration principle of
RRU3008
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Page85Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
One BBU3900 supports the maximum cell configuration of
S24/24/24. It cannot be more than 24TRX for each CPRI
port.
RRU3008 supports a maximum of eight GSM carriers.
RRU3008 supports 2-way TX and 2-way RX.
When RRU3008 support transmit diversity, the TRX it
supports reduce to 4TRX.
One RRU3008 does not serve two cells.
Configuration principle of
RRU3008
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Page86Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
One RRU3008 is adopted when S3-S8.
When it is larger than S8, two RRU3008s interconnected
are adopted by default.
When it is 2TX mode, the TRX number of the two channels
should be less than 1. For example, for S5, one RF channelcan only be configured 2TRX and another RF channel can
only be configured 3TRX.
Contents
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Page87Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
5. RRU3008 Introduction
5.1 RRU3008 Hardware Structure
5.2 Configuration Principle
5.3 Typical Configuration
Typical configuration of RRU3008
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S3 S8
Transmit mode: No Combining
Receive mode: Main Diversity Antenna mode: Double Feeder
(2TX + 2RX)
S1 S4
Transmit mode: Transmit
Diversity
Receive mode: Main Diversity
Antenna mode: Double Feeder
(2TX + 2RX)
Typical configuration of RRU3008
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S5 S16
Transmit mode: No Combining
Receive mode: Main Diversity
Antenna mode: Double Antenna
(2TX + 2RX)
Typical configuration of RRU3008
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Page90Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
S5 S16
Transmit mode: Combining
Receive mode: Main Diversity
Antenna mode: Single
Antenna (1TX + 2RX)
Summary
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Page91Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.
DBS3900 functions and features
DBS3900 hardware structure including BBU and RRU
Working mode of RRU and typical configuration
BTS networking topology and RRU networking topology