DBS3800 System Structure

HUAWEI TECHNOLOGIES CO., LTD.

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DBS3800 System Hardware Structure

DBS3800V100R008

HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

DBS3800 is a distributed NodeB solution put forward by Huawei Technolo

gies Co.Ltd.

In this slide, we’ll mainly introduce the hardware system structure, applicati

on scenarios, basic functions of modules and networking and configuration of

the DBS3800


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


References

《 DBS3800 System Description 》《 DBS3800 Hardware Description 》


Chapter1 General DescriptionChapter1 General Description

Chapter2 Hardware IntroductionChapter2 Hardware Introduction

Chapter3 Networking and ConfigurationChapter3 Networking and Configuration


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 fiber Optical fiber or CPRI high speed signal cable

Grounding cable+24V/-48V DC

Power cable-48V DC/220V AC

RRU3801C

RNC

Antenna

TMARF jumper

Feeder

RF jumperBBU3806


DBS3800 Product line

Remote radio unit Mini NodeBBaseband unit

BTS3801CBBU3806 RRU3801CBBU3806C


DBS3800 Installation

DBS3800 Distributed NodeB

small dimensioning design

RRU can be installed near antenna

The numbers of BBU and RRU can be configured according to different requirements

Traditional outdoor macro NodeB

Difficult to transport and move

Need large space to locate

Require long feeder

RRU

BBU

Outdoor macro NodeB


DBS3800 Deployment

Application scenario 1 ： Launch 3G services on the basis of a 2G site


DBS3800 Deployment

Application scenario 2 ： Launch a new 3G outdoor site without an equip

ment room


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


DBS3800 Deployment

Application scenario 4 ： Launching a new 3G outdoor site, the operator has no equipment roo

m or fiber resources, or it is very hard to route optical fibers


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 100km

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



Section1 BBU HardwareSection1 BBU Hardware

Section2Section2 　　 RRU HardwareRRU Hardware

Section3 BTS3801C HardwareSection3 BTS3801C Hardware

Section4 Antenna and Feeder SubsystemSection4 Antenna and Feeder Subsystem


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 15kgPower

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


BBU System Structure


BBU3806 Panel

8K/TT110M RST

EXT_ALM

ETH_RS232E1/T1/J1Ela Elb

RXTX

CPRI0

RXTX

CPRI1

RXTX

CPRI2

BITS GPS FE1

FE0 PWR/RS485ONOFF

TYPE LOCAT_ID E1/T1/J1

ONOFF

CPRI0 CPRI1 CPRI2 RUN ALM ACT

LIU7LIU6LIU5LIU4LIU3LIU2LIU1LIU0

ESD

BBU-RNC interface

BBU-BBU interface

BBU-RRU interface

BBU-RNC interface

Indicator

DIP switch


BBU Transmission Interfaces

Usage Types of interface Quantity Rate

Iub Interface

E1 8 2 Mbit/s

T1 8 1.5 Mbit/s

E3 2 34.4 Mbit/s

T3 2 44.7 Mbit/s

STM-1 2 155 Mbit/s

Fast Ethernet 2 100 Mbit/s

Interface between BBU and RRU

CPRI

(optical port or electrical port)

3

1.25 Gbit/s

Or

2.5 Gbit/s

Interface between BBUs

EIa 1 3×2.5Gbit/s

EIb 1 3×2.5Gbit/s


CPRICPRI CPRI ：： Common Public Radio InterfaceCommon Public Radio Interface


BBU3806 IndicatorsName Color Status Meaning

RUN green

Flashing slowly at 0.5 Hz The BBU is working normally

Flashing fast at 1Hz The BBU is loading

On Checkout status of the version or BBU is faulty

Off There is no power input or the BBU is faulty

ALM redOff There’s no alarm （ exclude VSWR warning ）On There’s alarm （ exclude VSWR warning ）

ACT greenOn The BBU is active

Off The BBU doesn’t work or it is standby or secondary

LIU0 ～LIU7

green

Off The link isn’t used or there’s no alarm

On Near end alarm

Flashing Far end alarm

CPRI0 ～ CPRI2

green

Off The port works normally or is closed

OnThe power of the signal received from the near end is not enough

Flashing LOS alarm


BBU3806 DIP Switches

DIP position7 DIP position8 Meaning

OFF OFF 120ohm E1

OFF ON 100ohm T1

ON OFF reserved

ON ON 75ohm E1 （ default value ）

DIP position4 DIP position5 DIP position6 Meaning

OFF OFF OFF Active BBU3806 （ default value ）ON OFF OFF Standby BBU3806

OFF ON OFF Secondary BBU3806

ON ON OFF Tertiary BBU3806

DIP position1 DIP position2 DIP position3 Meaning

OFF OFF OFF undefined ， default is OFF


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 LOC

AT.ID

ON

OFF

1 2

3

4PWR

RS485&EXT_ALM

2× FE

8× E1/T1

OPT

GPS

E1/T1 GND

CP

RI1_TX

CP

RI1_R

XC

PR

I2_TXC

PR

I2_RX

CP

RI0_TX

CP

RI0_R

X

Ela

Maintenance Maintenance PanelPanel

Bottom Bottom PanelPanel

Distributed Distributed BoardBoard



Section1 BBU Hardware Section1 BBU Hardware





RRU Overview

RRU3801C

Dimension （ with the housing ）

20W ： 565mm(H)×390mm(W)×165mm(D)

40W ： 610mm(H)×380mm(W)×200mm(D)

Weight 20WPower amplifier:≤18KG

40WPower amplifier:≤20KG

Power220V AC Allowed voltage range ： AC150V

AC ～ 300V ； AC/47Hz ～ 63Hz

-48V DC Allowed voltage range ： -40V DC ～ -60V DC

Power Consumption

20WPower amplifier

210W

40WPower amplifier

240W

Sector × Carrier 1×2


RRU System Structure

RNC BBU3806

RRU3801C

Dupl

exerO

ptic

al in

terfa

ce o

rel

ectri

cal i

nter

face

Hig

h sp

eed

seria

l int

erfa

cem

odul

e

Feedback channel

Transmit signalprocessor

Receive signalprocessor

ADC

ADC

DAC

MTRXRx1

Rx1

Rx2

A&Fsubsystem

Tx1

Rx2 LNA

LNA

PA


RRU3801C Panel

EXT_ALM/FAN

CPRI_E

CPRI_W

ALD

RUNALMTX_ACT/VSWR TST_RSLT

CPRI_E CPRI_W

ETH/RS232

RST

TST_ANTTST_CPRI

OFFON

LOCAT_ID

12

43

PWR

RX_IN/OUT

ANT_RXB

ANT_TX/RXA

DIP Switch ： used to indicate the slot Number of RRU3801C, not used yet

Maintenance Maintenance PanelPanel

Bottom Bottom PanelPanel

Distributed Distributed BoardBoard


RRU3801C Indicators

Name Color Status Meaning

RUN Green

Flashing slowly at 0.5Hz

The RRU is working normally

Flashing fast at1Hz Software of the board is loading

On Checkout status of the version or BBU is faulty

Off There is no power input or the BBU is faulty

ALM RedOff There’s no alarm （ exclude VSWR warning ）On There’s alarm （ exclude VSWR warning ）

TX_ACT/

VSWR

Red and Green

Green is On Power amplifier is working ， there’s no VSWR alarm

Green flashing slowly at 0.5Hz

Power amplifier isn’t working ， board is running

Red is OnPower amplifier is working ， there’s VSWR alarming on ANT_TX/RXA port

Red flashing slowly at 1Hz

Power amplifier is turned off ， and there’s VSWR alarming before it is turned off


RRU3801C IndicatorsName Color Status Meaning

TST_RSLTRed and Green

Green is on Test result is normal

Red is on Test result is abnormal

Green flashes slowly at 0.5Hz

Being tested

Off Un-tested status

CPRI_W Green

Off West port works normally or isn’t used

OnThe power of the receiving signal on west port is too weak


The signal transmitted from west port loss

CPRI_E Green

Off East port works normally or isn’t used

OnThe power of the receiving signal on east port is too weak


The signal transmitted from west port loss


BTS3801C Hardware Structure

BTS3801C

Dimension 610mm(H)×380mm(W)×390mm(D)

Weight 35kg

Power andPower Consumption

20W Power amplifier

220V AC 310W

40W Power amplifier

220V AC 340W

Sector × Carrier 1×2


Antenna and Feeder System


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.


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


Typical Configuration—1×1

Applied to wide areas and indoor Applied to wide areas and indoor circumstancescircumstances



Applied to long Applied to long stretched areas stretched areas



Applied to cities or other high Applied to cities or other high capacity areascapacity areas

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DBS3800 System Structure

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