BTS3900 Cabinet Combination

BTS3900 Cabinet Combination

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Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved.

Objectives

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

Describe the principle to combine BTS cabinets

Outline the hardware needed for BTS cabinet combination

Configure data for BTS combination

Monitor design of BTS combination


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Contents 1. Basic concept of BTS Cabinet Combination 2. Cables between BTS cabinets 3. Data configuration


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Contents 1. Cables between BTS cabinets 1.1 Basic Concept of BTS3900 Cabinet Combination 1.2 Hardware of BTS3900 Cabinet Combination


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Basic Configuration Principles

The BTS3900 developed by Huawei is an indoor macro BTS. The BTS3900 mainly consists of the BBU and DRFUs

A single BTS3900 cabinet provides up to 12 carriers with the maximum cell configuration of S4/4/4, and supports the dual-band application

Multiple cabinets support up to 72 carriers in the maximum cell configuration of S24/24/24


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Basic Configuration Principles

Minimum cost

Smooth upgrade of configuration

Minimum number of DRFUs

Minimum number of BBUs

Minimum number of antennas


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RF Configuration Principles

A maximum of three levels of DRFUs can be connected to one BBU

Mode of configuring two TRXs in one cell

A single DRFU does not support the S1/1 application; however, three DRFUs support the S3/3 application

When the DRFU works in transmit PBT, transmit diversity, or 4way receive diversity mode, a DRFU provides only one TRX. Therefore, the actual configuration does not involve the mode of configuring two TRXs in one cell


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Configuration Principles of the BBU

One BBU supports six CPRI ports. The star topology is recommended between DRFUs

Minimum number of trunk cables. You can determine the number of trunk cables as required, and take the existing configuration for saving transmission resources into account in networking

Minimum number of UPEUs. The configuration of a single UPEU is recommended. The redundancy backup mode can be configured if required


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Structure of the BTS3900 Cabinet

Double radio filter unit

Fan box GSM antenna and TMA control module Baseband unit Direct current distribution unit

-48V Cabinet Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved.

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Structure of the BTS3900 Cabinet

Double radio filter unit

Fan box GSM antenna and TMA control module Baseband unit Direct current distribution unit Power supply unit +24V or 220VAC Cabinet Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved.

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Logical Structure and Signal Flow


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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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GTMU

Controls, maintains, and operates the BTS

Monitors the fan module and the power supply module

Provides the Ethernet port for terminal maintenance

Supports four E1 inputs

Provides the CPRI ports for communication with the DRFU


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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 monitoring signals Port

Type

Description

MON0 RJ45

Transmitting two RS485 environment monitoring signals

MON1 RJ45

Transmitting two RS485 environment monitoring signals

EXTALM0

RJ45

Transmitting four dry contact alarms

EXTALM1

RJ45

Transmitting four dry contact alarms

PWR

3V3

+24 V/-48 V DC power input


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UEIU

UEIU is the environment interface board of BBU，it can support multi-route monitoring signal input

UEIU is optional and is only used when more ports are needed

Label

Connector Type

Description

MON0

RJ45

One RS485 signal

MON1

RJ45

One RS485 signal

EXTALM0

RJ45

Four dry contact signals

EXTALM1

RJ45

Four dry contact signals


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Contents 1. Basic concept of BTS combination 2. Cables between BTS cabinets 3. Data configuration


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Cabinet Combination

When the DRFU is used for configurations larger than S444 and no greater than S888, two cabinets in combined or stack mode are required. In the case that the area and height of the equipment room meet the requirements of both the combined and stack modes, the stack mode is recommended for easy capacity expansion

When the configuration is larger than S888 and no greater than S121212, three cabinets in combined mode are required

For internal monitoring of two or three +24 V DC/220 V AC cabinets, one UEIU is required. Note that only the –48 V DC cabinet supports the stack installation


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Contents 2. Cables between BTS cabinets 2.1 Combined Mode 2.2 Stack Mode


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Two Cabinets in Combined Mode

Installation Procedures

After installing the two cabinets side by side, remove the connecting plates on top of the two cabinets. Then, connect the two cabinets by using the connecting plates at the back of the cabinets and then install the equipotent cable

The cables inside the cabinet are installed before delivery

Connect the two monitoring cables between two cabinets.

For example, two monitoring cables are required for combined ¬–48 V DC cabinets: One is connected to the COM IN port on the FMUB in the extension cabinet and the COM OUT port on the FMUB in the basic cabinet. Another is connected to the EXT-ALM0 port on the BBU and the MON port on the DCDU-01 in the extension cabinet.

Install the RF jumpers and E1 cables Feed the power to the two cabinets using the same method as that for a single cabinet


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Installing the power cable between cabinet


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Monitoring System


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Installing monitoring cable


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Installing monitoring cable


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Installing the RF Jumpers


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Installing PGND cable


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Installation Note

Besides installing the equipotential cable between the two cabinets, install a grounding cable for each cabinet

Install two bases for the cabinets in combined mode

The power cable of each cabinet in combined mode is independent. The installation of the input power cable is the same as that for a single cabinet. The power cables inside the cabinet are installed before delivery

The routing and connection of the E1 cable and RF jumper are the same as those for a single cabinet

The cabinet installed with the BBU acts as the basic cabinet, and the other as the extension cabinet


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Combined Mode

Cable connections of the monitoring cables in the –48 V DC cabinet


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Combined Mode

Monitoring principles of the –48 V DC cabinet configured with optional devices


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Combined Mode

Cable connections of the monitoring cables in the +24 V DC cabinet


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Combined Mode

Monitoring principles of the –48 V DC cabinet configured with optional devices


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Combined Mode

Cable connections of the monitoring cables in the 220 V AC cabinet


Page30

Combined Mode

Monitoring principles of the 220V AC cabinet configured with optional devices


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Contents 2. Cables between BTS cabinets 2.1 Combined Mode 2.2 Stack Mode


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Two Cabinets in Stack Mode

Install the basic cabinet on the base

Remove the filler and connecting plate from the top of the cabinet. Then, install the installation block on top of the cabinet

Install the extension cabinet on top of the basic cabinet, and then secure the two cabinets

Install the equipotential cables and monitoring cables of the two cabinets

Install the RF jumpers and E1 cables of the two cabinets

Feed power to the cabinets


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Cabinets in stack mode


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CPRI cable connections


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Connections of the RF jumpers


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Contents 1. Principle of BTS combination 2. Cables between BTS cabinets 3. Data configuration


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Typical configuration S8/8/8


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Add BTS3900 Site


Page39

Add DRFU boards


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Binding logical TRX


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Add FMU boards


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Set Attributes


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Summary

Principle to combine BTS

Cables between cabinets and groups

Data configuration about cabinet combination


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Thank you www.huawei.com

BTS3900 Cabinet Combination

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