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DBS3800 System
Hardware Structure
DBS3800V100R008
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DBS3800 is a distributed NodeB
solution put forward by Huawei
Technologies Co.Ltd.
In this slide, well mainly introduce the
hardware system structure, application
scenarios, basic functions of modules
and networking and configuration of the
DBS3800
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Upon completion of this course, you will
be able to:
Application Scenarios of DBS3800
Hardware Structure of DBS3800
Functions of Different Modules
Networking and Configuration
Examples
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References
DBS3800 System Description
DBS3800 Hardware Description
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Chapter1 General Description
Chapter2 Hardware Introduction
Chapter3 Networking and Configuration
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DBS3800 Overview DBS3800 is a distributed NodeB of Huawei
Technologies Co.Ltd.
DBS3800 system consists of:
BBU3806
RRU3801C
Antenna and feeder system
Power cable
E1/T1 or optical fiberOptical fiber or CPRI high
speed signal cable
Grounding cable+24V/-48V DC
Power cable-48V DC/220V AC
RRU3801C
RNC
Antenna
TMA
RF jumper
Feeder
RF jumperBBU3806
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DBS3800 Deployment
Application scenario 1
Launch 3G services on the basis of a 2G site
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DBS3800 Deployment
Application scenario 2
Launch a new 3G outdoor site without an
equipment room
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DBS3800 Deployment
Application scenario 3:
Launch a new 3G indoor site, there is an equipment room
but the space is limited and load-bearing capacity is week
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DBS3800 Deployment
Application scenario 4
Launching a new 3G outdoor site, the operator has no equipment
room or fiber resources, or it is very hard to route optical fibers
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DBS3800 Characteristics
supports circuit domain (CS) and packet (PS) domain services
supports positioning services
supports softer handover, soft handover and hard handover
Supports transmit diversity mode and receive diversity mode
Supports high-speed downlink packet access (HSDPA) technology
HSDPA allows the traffic at up to 14.4 Mbps for a single cell
HDSPA enables a single cell to support 15 OVSF codes
Supports RRU cascading
The maximum distance between two RRUs is 40km
The distance from the first one to the last one should be within 100kmWhen using the 1.25 G optical module, cascading levels is less than 4
When using the 2.5 G optical module, cascading levels is less than 8
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Chapter1 General Description
Chapter2 Hardware Introduction
Chapter3 Networking and Configuration
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Chapter2 Hardware Introduction
Section1 BBU Hardware
Section2 RRU HardwareSection3 BTS3801C Hardware
Section4 Antenna and Feeder Subsystem
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BBU Overview
BBU3806 appearance BBU3806Cappearance
Index BBU3806 BBU3806C
Dimension 42mm(H)436mm(W)300mm(D) 610mm(H)380mm(W)200mm(D) (with
the housing )
Weight 3kg 15kg
Power
and Power
Consumption
-48V DC 60W 220V AC 120W
+24V DC 60W -48V DC 100W
CE Numbers 128CE(UL)/256CE(DL)(V17) 128CE(UL)/256CE(DL)(V17)
Cells 3 3
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BBU System Structure
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BBU3806 Panel
8K/TT110MRST
EXT_ALM
ETH_RS232E1/T1/J1 Ela Elb
RXTX
CPRI0
RXTX
CPRI1
RXTX
CPRI2
BITS GPS FE1
FE0 PWR/RS485ONOFF
TYPE LOCAT_ID E1/T1/J1
ONOFF
CPRI0 CPRI1 CPRI2 RUNALM ACT
LIU7LIU6LIU5LIU4LIU3LIU2LIU1LIU0
ESD
BBU-RNC interface
BBU-BBU interface
BBU-RRU interface
BBU-RNC interface
Indicator
DIP switch
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CPRICPRI Common Public Radio I nter face
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BBU3806C Panel
RST
10 M
8K/TT1
LIU0
LIU1
LIU2
LIU3
LIU4
LIU5
LIU6
LIU7
RUN
ALM
ACT
CPRI2
CPRI1
CPRI0
ON
OFF
ETH_RS232
E1/T1&
75/120
LOCAT.ID
ON
OFF
1
2
3
4
PWRRS485&
EXT_ALM
2FE
8E1/T1
OPT
GPS
E1/T1 GND
CPRI1
_TX
CPRI1
_RX
CPRI2
_TX
CPRI2
_RX
CPRI0
_TX
CPRI0
_RX
Ela
Maintenance Panel Bottom Panel Distr ibuted Board
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Chapter2 Hardware Introduction
Section1 BBU Hardware
Section2 RRU HardwareSection3 BTS3801C Hardware
Section4 Antenna and Feeder Subsystem
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RRU System Structure
RNC BBU3806
RRU3801C
Duplexer
Opticalinterfaceor
electr
icalinterface
Highspeedserialinterface
module
Feedback channel
Transmit signalprocessor
Receive signal
processor
ADC
ADC
DAC
MTRX
Rx1
Rx1
Rx2
A&Fsubsystem
Tx1
Rx2LNA
LNA
PA
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RRU3801C Panel
EXT_ALM/
FAN
CPRI_E
CPRI_W
ALD
RUNALM
TX_ACT/VSWR
TST_RSLT
CPRI_E CPRI_W
ETH/RS232
RST
TST_ANT
TST_CPRI
OFF
ON
LOCAT
_ID
12
43
PWR
RX_IN/OUT
ANT_RXB
ANT_TX/RXA
DIP Switchused to indicate the slot Number of RRU3801C, not used yet
Maintenance Panel Bottom Panel Distr ibuted Board
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Chapter2 Hardware Introduction
Section1 BBU Hardware
Section2 RRU HardwareSection3 BTS3801C Hardware
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BTS3801C Hardware Structure
BTS3801C
Dimension 610mm(H)380mm(W)390mm(D)
Weight 35kg
Power and
Power Consumption
20W Power
amplifier
220V AC 310W
40W Power
amplifier
220V AC 340W
Sector Carrier 12
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Chapter1 General Description
Chapter2 Hardware Introduction
Chapter3 Networking and Configuration
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Networking BBUs and RNC can form multiple networking modes such as star, chain, tree,
ring, and hybrid
For both chain and tree networking modes:
cascading levels is less than 5
The BBUs in the ring topology require additional transmission equipment.
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Networking
BBUs and RRUs can form multiple networking modes such as star, chain, tree,ring, and hybrid
For both chain and tree networking modes:When using the 1.25 G optical module, cascading levels is less than 4
When using the 2.5 G optical module, cascading levels is less than 8
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Typical Configuration11
Applied to wide areas and indoor cir cumstances
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Typical Configuration21
Appl ied to long stretched areas
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Typical Configuration31
Applied to cities or other high capacity areas
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