Digital Unit Description

DESCRIPTION

21/1551-LZA 701 6001-V4 Uen N

Copyright

Ericsson AB 20092012. All rights reserved. No part of this document may bereproduced in any form without the written permission of the copyright owner.

Disclaimer

The contents of this document are subject to revision without notice due tocontinued progress in methodology, design and manufacturing. Ericsson shallhave no liability for any error or damage of any kind resulting from the useof this document.

Trademark List

All trademarks mentioned herein are the property of their respective owners.These are shown in the document Trademark Information.

21/1551-LZA 701 6001-V4 Uen N | 2012-01-12

Contents

Contents

1 Product Overview 11.1 Purpose 11.2 Variants 11.3 Overview 11.4 Warranty Seal 2

2 Function Description 32.1 Maintenance Button 4

3 Technical Data 5

4 DU Interfaces 7

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Digital Unit Description

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Product Overview

1 Product Overview

This document describes the Digital Unit (DU) for RBS 6000 systems usedfor the GSM standard.

1.1 PurposeThe DU provides: switching, traffic management, timing, and radio interfacing.

1.2 VariantsThe DU variants are the following:

DUG 10 01

DUG 20 01

DUG 10 01 and DUG 20 01 support Evolved EDGE level A.

1.3 OverviewThis section provides an overview of the DU, as shown in Figure 1.

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Digital Unit Description

Ge0993A

FE

DC

BA

GP

SE

CLM

T A

LMT

BE

T A

ET

BE

SB

RI A

RI B

RI C

RI E

RI F

RI D

!

DUG 10 01

-48V

DC

GP

SE

CLM

T A

LMT

BE

T A

ET

BE

SB

!

DUG 20 01

-48V

DC

Figure 1 Overview DUG 10 01 and DUG 20 01

Information about DU placement can be found in RBS Description.

1.4 Warranty SealThe unit is equipped with a warranty seal sticker.

Note: Seals that has been implemented by Ericsson shall not be broken orremoved, as it otherwise will void warranty.

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Function Description

2 Function Description

More information can be found in RBS Configurations.

The DU has the following functions:

Timing function

Loadable software (from Flash Card) Radio interface

Transmission handling

External synchronization

Tower Mounted Amplifier Control Module (TMA-CM) (only for DUG 10 01)For the block diagrams of the DUs, see Figure 2 (DUG 10 01) and Figure3 (DUG 20 01).

Ge0911

DU

TMA-CM

Transmission

Timing

Radiointerface

Figure 2 DUG 10 01 Block Diagram

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Digital Unit Description

Ge0376A

DU

Processing

Transmission

Timing

RadiointerfaceBaseband

Figure 3 DUG 20 01 Block Diagram

2.1 Maintenance ButtonSee Indicators, Buttons, and Switchesfor information about the maintenancebutton.

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Technical Data

3 Technical Data

Technical data for the DU is listed in Table 1 .

Table 1 Technical DataTechnicalData

Powerdissipation,maximum

Dimensions Capacity data

Height Width Depth Weight Maximum carrier capacity,(measured in carrier elements)

DUG 10 01 20 W 350 mm 30 mm 285 mm

Digital Unit Description

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DU Interfaces

4 DU Interfaces

The signalling and power interfaces for the DU are listed in Table 2.

The DUG 10 01 and DUG 20 01 have different radio interfaces. This is becausethe DUG 10 01 uses the architecture from RBS 2000, with the basebandcircuitry on the Radio Unit (RU) (the RUG 11). Instead of a separate unit forTMA-CM (as in RBS 2000), this functionality is included in the DUG 10 01, andcould also be used for antenna supervision. Only electrical connection betweenthe DU and RU is supported.

The DUG 20 01 uses the same architecture as the other radio standards in RBS6000 (WCDMA and LTE), with the baseband circuitry on the DU connectedover the standardized CPRI (2.5 Gbps) interface to a Radio Unit Multi-standard(RUS). The RU does in this case include the TMA-CM functionality and theCPRI interface supports both electrical and optical connection (the latter formain-remote configurations).Table 2 DU Interfaces

Marking Interface Description OpticalIndicator

Power(1)

-48 V DC(2)ET20 A -48 V DC

Power

No

GPS RJ-45 GPS interface includingGPS power

No

EC RJ-45 Enclosure control

EC-bus common

Optical indicator, green

Yes

LMT A RJ-45 Local ManagementTerminal (LMT) A

No

LMT B RJ-45 Site LAN and LMT B

Optical indicator, green

Yes

ET A RJ-45 E1/T1 port

Optical indicator, green

Yes

ET B RJ-45 E1/T1 port

Optical indicator, green

Yes

- Fault

Optical indicator, red

Yes

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Digital Unit Description

Marking Interface Description OpticalIndicator

- Operation

Optical indicator, green

Yes

Maintenance

Optical indicator, blue

Yes-

Maintenance button

For information about themaintenance button, seeSection 2.1 on page 4.

No

- Status

Optical indicator, yellow

Yes

ESB HSIO For synchronization withother GSM digital unitslike DUG or DXU.

No

RI A - RI F(1)

A - F(2)Y-link, 6 x HSIO(1)

CPRI, 6 x SFP(2)Radio Interface AFincluding Tower MountedAmplifier (TMA) powerfor DUG 10 01.

Optical indicator, green

Yes

(1) DUG 10 01(2) DUG 20 01

More information about optical indicators can be found in Indicators, Buttons,and Switches.

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toc1 Product Overview1.1 Purpose1.2 Variants1.3 Overview1.4 Warranty Seal

2 Function Description2.1 Maintenance Button

3 Technical Data4 DU Interfaces