3900 Bts Structure

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HUAWEI BTS3036 System Structure

ISSUE 1.0

HUAWEI TECHNOLOGIES CO., LTD. All rights Reserved Page 2

Upon completion of this course, you will be able to:

Know the functions and features of BTS3036

Master the BTS3036 hardware structure

Master the cable connection of BTS3036


References

BTS3036 Product description

BTS3036 Installation Manual

BTS3036 Hardware description


Chapter 1 OverviewChapter 1 Overview

Chapter 2 System ComponentsChapter 2 System Components

Chapter 3 Typical configurationChapter 3 Typical configuration


Features and Functions 1

It shares the BBU, which is the central processing unit, with the BTS3036 to minimize the number of spare parts and reduce the cost.

It can be flexibly installed in a small footprint and can be easily maintained

It supports multiple frequency bands, such as PGSM900, EGSM900, and DCS1800


Features and Functions 2 It supports the GPRS

It supports multiple network topologies, such as star, tree, chain, ring, and hybrid topologies

It supports the cell broadcast SMS and point-to-point SMS.

A single cabinet supports up to 12 carriers in the maximum cell configuration of S4/4/4.


Chapter 1 OverviewChapter 1 Overview

Chapter 2 System ComponentsChapter 2 System Components

Chapter 3 Signal ProcessingChapter 3 Signal Processing

Chapter 4 Typical configurationChapter 4 Typical configuration


System Architecture of BTS3036

BTS3036 system


Appearance of the BTS3036 Cabinet

Configuration Type

Width (mm)

Depth (mm)

Height (mm)

Cabinet 600 450 900

BTS3036 cabinet

Configuration Type Weight (kg)

Empty cabinet 57

Full Configuration 142


Structure of the BTS3036 Cabinet(-48V)Fully configured BTS3036 Single cabinet

(1) Double radio filter unit

(2) Fan box

(3) Baseband unit (4) Direct current distribution unit(6) Cable in/out unit

-


BTS3036 Cabinet and BoardsBoard/Module Full Name

BSBC(BBU) Universal BBU Subrack Backplane type C (2U)

UEIU Universal Environment Interface Unit

GTMU GSM Transmission and Management Unit for the BBU

UELP Universal E1/T1 Lightning Protection Unit

UBFA Universal BBU Fan unit type A (2U)

UPEU Universal Power and Environment interface Unit

DRFU Double Radio Filter Unit

DCDU Direct Current Distribution Unit

GATM GSM Antenna and TMA Control Module

Fan box Fan box


Logical Structure of the BTS3036


Common Subsystem

(1) BBU Control subsystem whose functions are implemented by the BBU

(2) DRFU RF subsystem whose functions are implemented by the DRFU

(3) DCDU Power subsystem

(4) Fan Box


1.1 Functions of BBU Provides physical ports between the BTS and the BSC for

interaction

Provides the CPRI ports for communication with the DRFU

Provides the USB port for downloading the BTS software

Provides OM channels for connection to the LMT (or M2000)

Processes UL and DL data

Provides centralized management on the entire BTS system, such as OM and signaling processing

Provides the reference clock for the entire system


1.2 Appearance and Panel of the BBU1. BBU

2. Panel of the BBU

Dimensions(mm):442×310 ×86.1(2U) Weight:≤12KgPower Type:-48V DC


1.3 Logical Structure of the BBU3036


1.4.1 Ports of the BBU3036 Power port

Port Type Location DescriptionPWR 7W2 connector 1.4.2.7.3 UPEU

Module-48 V power input


1.4.2 Ports of the BBU3036Transmission ports 1

Port Type Location Description

INSIDE DB25 male connector UELP

board

Transfers the four E1/T1 signals between the UELP and the GTMU.

OUTSIDE DB26 male connector

Provides the input and output of the four E1/T1 signals between the BBU and the BSC.


1.4.3 Ports of the BBU3036Transmission ports 2

Port Type Location

Description

CPRI0–CPRI5

SFP connector

GTMU board

Provides the input and output of the optical and electrical transmission signals between the BBU and the RF module.

E1/T1 DB26 male connector

Provides the input and output of the four E1/T1 signals between the GTMU and the UELP or between the GTMU and the BSC.

FE0 RJ45 connector

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 connector

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.


1.4.4 Ports of the BBU3036 Alarm ports

Name Type Location DescriptionMON0 RJ45

connector1.4.2.7.3 UPEU Module and 1.4.2.7.4 UEIU Board

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 communication protocols related to the dry contact.

EXT-ALM1

RJ45 connector

Reserved


1.4.5 Ports of the BBU3036 Other ports of the BBU

Port Type Location DescriptionETH RJ45

connector

1.4.2.7.5 GTMU Board

For local maintenance and commissioning

USB USB connector

A reserved port that performs the following function:Automatically upgrades the software through the USB disk.

TST USB connector

For testing of the output clock signals by using a tester


1.4.6 BBU3036 Boards and Modules

The BBU3036 boards consist of the following:

(1) BSBC Board

(2) UEIU Board

(3) GTMU Board

(4) UELP Board

the BBU3036 modules consist of the following:

(5) UBFA Modules

(6) UPEU Modules


1.4.6.1 Functions of BSBC Board Clock signal: The BSBC sends the precise clock signals provided by the

GTMU to each service processing module as reference clock.

Power input: The BSBC distributes the +12 V DC power input provided by the power module to the boards and modules.

Low-speed signal management: The BSBC provides the interface for the GTMU to monitor and manage the service board, power, backplane, and fan.

High-speed signal management: The BSBC distributes and converges information about data, control, and management of all boards in the baseband unit system

Service signal: The BSBC transfers the UL and DL baseband data of the GTMU.


1.4.6.1 Slots of BSBC BoardThe BSBC is the backplane of the BBU. The BSBC provides eight board slots, two power slots, and one fan slot.


1.4.6.2 Functions of UBFA Module Fan control board

(1) Processes the two-channel 12 V power input by the backplane to provide power for the fan

(2) Communicates with the GTMU to control and monitor the fan

(3) Detects and adjusts the fan speed

(4) Detects the board temperature by the built-in temperature sensor

(5)Provides the automatic reset function

Fan: performs forced heat dissipation for the entire BBU


1.4.6.2 LEDs on UBFA Module

LED Color Status Description

STATE Green Blinking twice per second

The board is not securely connected. An alarm is not generated.

Red On An alarm is generated.

Green Blinking once every two seconds

The board operates normally.


1.4.6.3 Functions of UPEU Modul Supplies power to the boards, modules, and fans

Introduces environment monitoring signals to the BBU

Reports fault signals, in-position signals, and version information associated with the boards and modules

Structure and working principles of the UPEU


1.4.6.3 Ports on UPEU panel Port Type Description

MON0 RJ45 Connector

Provides the input and output of the externally collected environment monitoring signals to the GTMU

MON1 RJ45 Connector

Reserved

EXT-ALM0

RJ45 Connector

Transmits the externally collected environment monitoring signals to the GTMU through communication protocols related to the dry contact.

EXT-ALM1

RJ45 Connector

Reserved

PWR 7W2 connector

-48V power input


1.4.6.3 LEDs on UPEU panelLEDs on the UPEU

LED Color Status

Description

RUN Green On The module is functional.

Off The module is not functional.


1.4.6.4 Function of UEIU Board

The universal environment interface unit (UEIU) supports multiple environment monitoring signals. The UEIU is optional. It is configured when the environment interfaces are insufficient.


1.4.6.4 Ports on UEIU 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


1.6.4.5 Function of GTMU Board Controls, maintains, and operates the BTS

Supports fault management, configuration management, performance management, and security management

Supports the monitoring of the fan module and power supply module

Provides port for terminal maintenance

Supports four E1 inputs

Provides CPRI ports for communication with the RF modules


1.4.6.5 Ports on GTMU Board

Port Type DescriptionCPRI0–CPRI5

SFP connector

Provides the input and output of optical and electrical transmission signals

ETH RJ45 connector

Local maintenance and commissioning

FE0 RJ45 connector

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


1.4.6.5 Ports on GTMU Board

Port Type DescriptionFE1 DLC

connectorA 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 USB Connector

A reserved port that performs the following function:Automatically upgrades the software through the USB disk

TST USB connector

Testing of the output clock signals by using a tester

E1/T1 DB26 male connector

Provides the input and output of the four E1/T1 signals between the GTMU and the UELP or between the GTMU and the BSC.


1.4.6.5 LEDs on GTMU Board LED Color Status Description

RUN Green On The board is faulty.

Off There is no power supply or the board is faulty.

Blinking once every two seconds

The board is operational.

Blinking once every four seconds

The OML link is abnormal.

Blinking four times per second

The board is loading software.

ALM Red On A fault occurs in the running board.

Off An alarm is not generated.

ACT Green On The board is operational.

Off The board is faulty.


1.4.6.5 LEDs on GTMU Board

LED Color

Status Description

LIU0–LIU3

Green On A local E1/T1 alarm is generated.


A remote E1/T1 alarm is generated.

Off This link is not used or the alarm is cleared.

CPRI0–CPRI5

Green On The CPRI link is functional.

Red On The reception of the optical module is abnormal and an alarm is generated.


1.4.6.5 DIP Switch of GTMU BoardDIP 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.


1.4.6.5 DIP Switch of GTMUDIP Switch DIP Status Description

1 2 3 4

SW4 ON ON ON ON The E1 link can be bypassed.

OFF OFF OFF OFF

DIP Switc

h

DIP Status Description1 2 3 4

SW5 ON ON ON ON

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.


2.1 Functions of DRFU It implements the direct frequency conversion technique in the transmit

channel, modulates the baseband signals to GSM RF signals. After filtering, amplifying, and combining the RF signals, the DRFU sends the signals to the antenna for transmission. The combining can be performed as required.

It receives RF signals from the antenna and performs down-conversion, amplification, analog-to-digital conversion, matched filtering, and Automatic Gain Control (AGC). Then, the DRFU transmits the signals to the BBU for further processing.

It controls power and detects the Voltage Standing Wave Ration (VSWR).


2.2 Operating Environment of DRFU


2.3 Functional structure of DRFU


2.4 DRFU PanelSpecifications of the DRFU

Item SpecificationsDimensions Front panel: 395.2 mm (L)

× 70.6 mm (W)

Working voltage -48 V power input

Power consumption (heat consumption)

Maximum power consumption: 450 W

Weight 12 kg


2.5 LEDs on DRFULED Status Meaning

RUN On The power input is normal, but the BBU is faulty.

Off There is no power supply or the module is faulty.


The module is functional.


The module is loading software or is not started.

ALM On A fault alarm is generated.

Off No alarm is generated.

ACT On The module is functional and is correctly connected to the BBU.

Off The connection with the BBU is not established.


The DRFU is being tested on the Site Maintenance Terminal.


2.6 LEDs on DRFU LED Status Meaning

VSWR Off (red) No VSWR alarm is detected.

Blinking once every two seconds (red)

The VSWR alarm is generated on only the ANT2 port.

Blinking four times per second (red)

The VSWR alarms are generated on the ANT1 and ANT2 ports.

On (red) The VSWR alarm is generated on only the ANT1 port.

CPRI0 On (green) The CPRI link is functional.

On (red) The interface module fails to receive signals.


The CPRI link has a loss-of-lock error.

CPRI1 On (green) The CPRI link is functional.

On (red) The interface module fails to receive signals.


The CPRI link has a loss-of-lock error.


2.7 Ports on the DRFU panel Type Connector Ports Description

Port for transceiving RF signals

N female Connector ANT1 Used in connection to the antenna Subsystem

ANT2

CPRI port SFP female connector CPRI0 Used in connection to the BBU, or in connection to the upper-level cascaded DRFU

CPRI1 Used in connection to the lower-level cascaded DRFU

Port for transmitting RF Signals between DRFUs

QMA female connector

RX1 in Input port for diversity signals in antenna channel 1

RX1 out

Output port of diversity signals in antenna channel 1

RX2 in Input port for diversity signals in antenna channel 2

RX2 out

Output port of diversity signals in antenna channel 2

Power port 7W2 power connector PWR Receives power input


3.1 Function of DCDU (10 Outputs) The DCDU provides one input and 10 outputs and distributes

the -48 V DC power to the BBU, DRFU, and fan box in the cabinet.

DCDU (10 outputs)


3.2 Specification of DCDU(10 Outputs)Item Specifications

Dimensions Module: 442.0 mm (W) x 42.0 mm (H)

Weight ≤ 3kg

Working voltage Normal value -48 V DC

Permissible Range -38.4 V DC to -57 V DC


3.4 Panel of DCDU (four outputs)

Name Label DescriptionPower input terminal

NEG(-) DCDU low level input terminal

RTN(+) DCDU high level input terminal

Power output port

SPARE2, SPARE1, BBU, FAN, and RFU5-RFU0

Power ports supplying the 10 outputs of power to the BBU, DRFU, GATM, and fan box

Power switch

SPARE2, SPARE1, BBU, FAN, and RFU5-RFU0

Power switch controlling the 10 outputs for the BBU, DRFU, GATM, and fan box

Alarm output port

SPD ALM Dry contact alarm output port

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3900 Bts Structure