GRFU Description V1.1

GRFU Description

Issue V1.1

Date 2011-02-15

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.

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GRFU Description Contents

Contents

1 Introduction..................................................................................1

2 Technical Specifications.................................................................22.1 RF Specifications...............................................................................................................................................2

2.2 Power Consumption...........................................................................................................................................3

2.2.1 Power Consumption of the BTS3900.......................................................................................................3

2.2.2 Power Consumption of the BTS3900A....................................................................................................4

2.2.3 Power Consumption of the BTS3900L....................................................................................................4

3 Acronyms and Abbreviations............................................................................5


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GRFU Description 1 Introduction

1 Introduction

The GSM Radio Frequency Unit (GRFU) is a Radio Frequency (RF) unit based on the multi-carrier technology. GRFUs 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 large capacity. A GRFU supports a maximum of six carriers. Figure 1-1 shows its exterior.

Figure 1-1 Exterior of the GRFU


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GRFU Description 1 Technical Specifications

2 Technical Specifications

2.1 RF Specifications

Table 2-1 RF specifications of the GRFU


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Item RF Specification

Supported frequency band

Frequency Band RX Band (MHz) TX Band (MHz)

PGSM 900 (V2) 890 to 915 935 to 960

EGSM 900M（V2a） 885 to 910 930 to 955

EGSM 900 (V2) 880 to 915 925 to 960

GSM 1800 (V2) 1710 to 1770 1805 to 1865

1725 to 1785 1820 to 1880

GSM 1800M（V2a） 1710 to 1755 1805 to 1850

GSM 1900 (V1) 1850 to 1890 1930 to 1970

1870 to 1910 1950 to 1990

Capacity A cabinet supports a maximum of 36 carriers. A cell supports a maximum of 24 carries.

A base station supports a maximum of 72 carriers. The maximum configuration is S24/24/24.

Receiver sensitivity for the GRFU V2

Frequency Band Independent Receive Two-Way Receive Diversity

900 MHz –113.5 dBm –116.5 dBm

1800 MHz –113.8 dBm –116.8 dBm

Receiver sensitivity for the GRFU V1

Frequency Band Independent Receive Two-Way Receive Diversity

1900 M –113 dBm –116 dBm

Output power

900M/1800M (GMSK/8PSK, for the GRFU V2)

With power sharing:

3TRX: 31W/20W

4TRX: 27W/17W

5TRX: 20W/13W

6TRX: 20W/13W

Without power sharing:

3TRX: 27W/17W

4TRX: 20W/13W

5TRX: 16W/10W

6TRX: 12W/8W

1900M (GMSK/8PSK, for the GRFU V1)

With power sharing:

3TRX: 31W/20W

4TRX: 27W/17W

5TRX: 20W/13W

6TRX: 16W/10W

Without power sharing:

3TRX: 27W/17W

4TRX: 20W/13W

5TRX: 12W/8W

6TRX: 10W/6.6W


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Item RF Specification

For the RF standards, see EN 301 502 V9.2.1

2.2 Power Consumption

2.2.1 Power Consumption of the BTS3900

Table 2-1 Power consumption of the BTS3900 that is configured with GRFUs (V2)

Item Specification

Power consumption

(DC)

S4/4/4, 900 MHz, TOC = 20 W 680W

S6/6/6, 900 MHz, TOC = 20 W 710W

S4/4/4, 1800 MHz, TOC = 20 W 670W

S6/6/6, 1800 MHz, TOC = 20 W 770W

Note:

With Multi-Carrier Intelligent Voltage Regulation/ TRX Working Voltage Adjustment/ DTX/ Power Control/ Power Sharing open.

2.2.2 Power Consumption of the BTS3900A

Table 2-1 Power consumption of the BTS3900A that is configured with GRFUs (V2)

Item Specification

Power consumption

(AC)

S4/4/4, 900 MHz, TOC = 20 W 760W

S6/6/6, 900 MHz, TOC = 20 W 790W

S4/4/4, 1800 MHz, TOC = 20 W 750W

S6/6/6, 1800 MHz, TOC = 20 W 860W

Note:



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2.2.3 Power Consumption of the BTS3900L

Table 2-1 Power consumption of the BTS3900L that is configured with GRFUs (V2)

Item Specification

Power consumption

(DC)

TOC = 20 W

900M S4/4/4 + 1800M S8/8/8

1800W

Note:



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GRFU Description 1 Acronyms and Abbreviations

3 Acronyms and Abbreviations

GATM GSM Antenna and TMA Control Module

GRFU GSM Radio Frequency Unit

MTBF Mean Time Between Failures

MTTR Mean Time to Recovery

PBT Power Boost Technology

RF Radio Frequency

RRU Remote RF Unit

TOC Transmit Power at the Top of Cabinet


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GRFU Description V1.1

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