DRFU-Description-

DRFU Description

Issue

V1.1

Date

2011-02-15

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

http://www.huawei.com

Email:

[email protected]

Issue V1.1 (2011-02-15)

Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

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DRFU Description

Contents

Contents 1 Introduction...................................................................................1 1.1 DRFU.......................................................................................................................................................................1 1.2 GATM......................................................................................................................................................................1

2 Technical Specifications..................................................................3 2.1 RF Specifications.....................................................................................................................................................3 2.2 Power Consumption................................................................................................................................................4 Power Consumption of the BTS3900.........................................................................................................................4 Power Consumption of the BTS3900A......................................................................................................................4 Power Consumption of the BTS3900L......................................................................................................................4

3 Acronyms and Abbreviations...........................................................6

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3 Acronyms and Abbreviations

1

Introduction

1.1 DRFU The Double Radio Frequency Unit (DRFU) is a Radio Frequency (RF) unit based on the dual density technology. DRFUs are installed in the indoor macro base station (including the BTS3900 and the BTS3900L) and the outdoor macro base station (namely, the BTS3900A). They are usually used in scenarios requiring medium or small capacity. A DRFU supports a maximum of two carriers. a.1 shows its exterior. Figure a.1 Exterior of the DRFU

1.2 GATM The GSM Antenna and TMA Control module (GATM) is optional. If DRFUs are configured in the RF cabinet and the Remote Electrical Tilt (RET) antenna or Tower-Mounted Amplifier (TMA) is required, the GATM must be configured. The GATM is configured in the BTS3900 or the BTS3900A. a.1 shows the front panel of the GATM. Issue V1.1 (2011-02-15)


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DRFU Description


Figure a.1 Front panel of the GATM

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DRFU Description


2

Technical Specifications

2.1 RF Specifications Figure a.1 RF specifications of the DRFU Item

RF Specification

Supported frequency band

Frequency Band

RX Band (MHz)

TX Band (MHz)

EGSM 900

880 to 915

925 to 960

PGSM 900

890 to 915

935 to 960

GSM 1800

1710 to 1785

1805 to 1880

Capacity

Receiver sensitivity

Output power

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

A cabinet supports a maximum of 12 carriers. A cell supports a maximum of 24 carries.



A base station supports a maximum of 36 carriers, and the maximum configuration is S12/12/12.

Independent Receive

Two-Way Receive Diversity

Four-Way Receive Diversity

–113 dBm

–116 dBm

–118.5 dBm

900M (GMSK/8PSK)

1800M (GMSK/8PSK)



Non-combined transmission: 45 W/30 W



Non-combined transmission: 40 W/26 W



Combined transmission: 20 W/14 W



Combined transmission: 18 W/12 W



PBT: 71 W/47 W



PBT: 63 W/42 W


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DRFU Description


2.2 Power Consumption Power Consumption of the BTS3900 Figure a.2 Power consumption of the BTS3900 that is configured with DRFUs Item

Specification

Power consumption (DC)

Configuration

Typical Power Consumption (W)

S2/2/2, 900 MHz, TOC = 45 W

750

S4/4/4, 900 MHz, TOC = 20 W

1,140

S2/2/2, 1800 MHz, TOC = 40 W

750

S4/4/4, 1800 MHz, TOC = 18 W

1,150

NOTE 

TOC refers to the output power at the top of the cabinet.



The typical power consumption of a specific base station refers to the maximum power consumption of the base station when it carries 30% of the total load.

Power Consumption of the BTS3900A Figure a.3 Power consumption of the BTS3900A that is configured with DRFUs Item

Specification

Power consumption (AC)

Configuration


S2/2/2, 900 MHz, TOC = 45 W

860

S4/4/4, 900 MHz, TOC = 20 W

1,290

S2/2/2, 1800 MHz, TOC = 40 W

860

S4/4/4, 1800 MHz, TOC = 18 W

1,300

Power Consumption of the BTS3900L Figure a.4 Power consumption of the BTS3900L that is configured with DRFUs Item

Specification

Power consumption

Configuration

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DRFU Description


Item

Specification

(DC)

S6/6/6, 900 MHz, TOC = 20 W

1,370

S8/8/8, 900 MHz, TOC = 20 W

1,970

S2/2/2, 1800 MHz, TOC = 18 W

1,390

S4/4/4, 1800 MHz, TOC = 18 W

1,990

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Acronyms and Abbreviations

DRFU

Dual-Density RF Unit

GATM

GSM Antenna and TMA Control Module

MTBF

Mean Time Between Failures

RET

Remote Electrical Tilt

MTTR

Mean Time to Recovery

RF

Radio Frequency

PBT

Power Boost Technology

RRU

Remote RF Unit

TMA

Tower-Mounted Amplifier

TOC

Transmit Power at the Top of Cabinet

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DRFU-Description-

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