BBU3900 Hardware Description(V100R008C00_05)(PDF)-En

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BBU3900

V100R008C00

Hardware Description

Issue 05

Date 2013-11-08

HUAWEI TECHNOLOGIES CO., LTD.


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Copyright Huawei Technologies Co., Ltd. 2013. 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 a 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 05 (2013-11-08) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd.

i
http://www.huawei.com/


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About This Document

Overview

A BBU3900 is a baseband processing unit, which can be used in 3900 series base stations. This

section describes the configuration, functions application scenarios of boards used in BBU3900s.

The exteriors of components or cables in this document are for reference only. The actual

exteriors may be different.

Product Version

The following table lists the product versions related to this document.

Product Name Product Version

BTS3900 V100R008C00. The mapping single-modebase station versions are as follows:

GBTS: V100R015C00

eGBTS: V100R015C00

NodeB: V200R015C00

eNodeB: V100R006C00

BTS3900A

BTS3900L

BTS3900AL

DBS3900

BTS3900C V100R008C00. The mapping single-mode

base station version is as follows:

NodeB: V200R015C00

Intended Audience

This document is intended for:

l Base station installation personnel

l System personnel

l Site maintenance personnel

BBU3900

Hardware Description About This Document



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Organization

1 Changes in BBU3900 Hardware Description

This chapter describes the changes inBBU3900 Hardware Description.

2 BBU3900 Exterior

BBU3900 has a case structure with a width of 19 in. and a height of 2 U (88.90 mm or 3.50 in.).

3 Principles and Functions of a BBU3900

A BBU3900 is a baseband processing unit. It processes the baseband signals of a base station.

4 Slot Assignment in the BBU3900

This section describes the BBU3900 slot assignment principles.

5 BBU3900 Boards

BBU3900 boards include main processing boards, baseband processing boards, transmission

extension boards, fan modules, power modules, monitoring modules, clock boards with satellite

cards, baseband extension boards, and interconnection boards.

6 BBU3900 Engineering Specifications

This section describes the engineering specifications of the BBU, including the power

specifications, size, weight, heat dissipation capability, environmental specifications, and surge

protection specifications.

Conventions

Symbol Conventions

The symbols that may be found in this document are defined as follows.

Symbol Description

Indicates an imminently hazardous situation which, if not

avoided, will result in death or serious injury.

Indicates a potentially hazardous situation which, if not

avoided, could result in death or serious injury.


avoided, may result in minor or moderate injury.


avoided, could result in equipment damage, data loss,

performance deterioration, or unanticipated results.

NOTICE is used to address practices not related to personal

injury.

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Symbol Description

Calls attention to important information, best practices and

tips.

NOTE is used to address information not related to personalinjury, equipment damage, and environment deterioration.

General Conventions

The general conventions that may be found in this document are defined as follows.

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files, directories, folders, and users are in

boldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are in

Courier New.

Command Conventions

The command conventions that may be found in this document are defined as follows.


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated by

vertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated by

vertical bars. One item is selected or no item is selected.

{ x | y | ... }* Optional items are grouped in braces and separated by

vertical bars. A minimum of one item or a maximum of all

items can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated by

vertical bars. Several items or no item can be selected.

GUI Conventions

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The GUI conventions that may be found in this document are defined as follows.


Boldface Buttons, menus, parameters, tabs, window, and dialog titles

are in boldface. For example, click OK.

> Multi-level menus are in boldfaceand separated by the ">"

signs. For example, choose File> Create> Folder.

Keyboard Operations

The keyboard operations that may be found in this document are defined as follows.

Format Description

Key Press the key. For example, press Enterand press Tab.

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt

+Ameans the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, Ameans

the two keys should be pressed in turn.

Mouse Operations

The mouse operations that may be found in this document are defined as follows.

Action Description

Click Select and release the primary mouse button without moving

the pointer.

Double-click Press the primary mouse button twice continuously and

quickly without moving the pointer.

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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Contents

About This Document.....................................................................................................................ii

1 Changesin BBU3900 Hardware Description...........................................................................1

2 BBU3900Exterior...........................................................................................................................5

3 Principles and Functions of a BBU3900.....................................................................................7

4 Slot Assignment in the BBU3900................................................................................................9

4.1 BBU Slot Distribution..................................................................................................................................................10

4.2 BBU Slot Assignment in a GSM Base Station.............................................................................................................10

4.3 BBU Slot Assignment in a UMTS Base Station..........................................................................................................13

4.4 BBU Slot Assignment in an LTE Base Station............................................................................................................15

4.5 BBU Slot Assignment in a GU or G*U Base Station...................................................................................................17

4.6 BBU Slot Assignment in a GL or G*L Base Station...................................................................................................21

4.7 BBU Slot Assignment in a UL or U*L Base Station...................................................................................................25

4.8 BBU Slot Assignment in a Triple-Mode Base Station.................................................................................................29

5 BBU3900 Boards...........................................................................................................................37

5.1 WMPT..........................................................................................................................................................................39

5.2 UMPT...........................................................................................................................................................................45

5.3 GTMU..........................................................................................................................................................................57

5.4 LMPT............................................................................................................................................................................66

5.5 WBBP...........................................................................................................................................................................71

5.6 LBBP............................................................................................................................................................................78

5.7 FAN..............................................................................................................................................................................90

5.8 UPEU............................................................................................................................................................................92

5.9 UEIU.............................................................................................................................................................................95

5.10 UTRP..........................................................................................................................................................................97

5.11 USCU........................................................................................................................................................................106

5.12 UBRI.........................................................................................................................................................................110

5.13 UCIU........................................................................................................................................................................115

5.14 Optical Modules.......................................................................................................................................................118

6 BBU3900 Engineering Specifications....................................................................................120

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1Changes in BBU3900 Hardware DescriptionThis chapter describes the changes inBBU3900 Hardware Description.

05 (2013-11-08)

This is the fifth commercial release.

Compared with issue 04 (2013-08-26), the following topics are added:

l 4.1 BBU Slot Distribution

Compared with issue 04 (2013-08-26), this issue includes the following changes:

Topic Change Description

5.1 WMPT Changed the description of the TST port.

5.3 GTMU

5.4 LMPT

Compared with issue 04 (2013-08-26), no topic is deleted.

04 (2013-08-26)This is the fourth commercial release.

Compared with issue 03 (2013-08-01), no topic is added or deleted.



5.10 UTRP Added the UTRPa.

5.6 LBBP Modified the description of the HEI port.

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03 (2013-08-01)

This is the third commercial release.

Compared with that of issue 02 (2013-06-26), the document title has been changed from

"DBS3900 Hardware Description" to "BBU3900 Hardware Description".

Compared with issue 02 (2013-06-26), this issue excludes some contents but still keeps the

description of the BBU3900 exterior, functions, working principles, as well as boards

configurations and specifications. For other contents, see 3900 Series Base Station Hardware

Description.

02 (2013-06-26)

This is the second commercial release ofDBS3900 Hardware Description.



5.2 UMPT Modified the radio access technologies

(RATs) supported by the UMPT.

5.6 LBBP l Added the method of calculating the

maximum number of data radio bearers

(DRBs).

l Added description of the throughput of an

LBBP working in LTE TDD mode.

5.4 LMPT Added the method of calculating the

maximum number of DRBs.

Compared with issue 01 (2013-04-28), this issue does not include any new information or

exclude any information.

01 (2013-04-28)

This is the first commercial release ofDBS3900 Hardware Description.

Compared with Draft A (2013-01-15), this issue includes the following new information:l 5.14 Optical Modules

Compared with Draft A (2013-01-15), this issue includes the following changes:


3 Principles and Functions of a BBU3900 Added the working principle of the

BBU3900.

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l 5.1 WMPT

l 5.2 UMPT

l 5.3 GTMU

l 5.4 LMPT

l 5.5 WBBP

l 5.6 LBBP

l 5.8 UPEU

l 5.9 UEIU

l 5.10 UTRP

l 5.11 USCU

l 5.12 UBRI

l 5.13 UCIU

Added figures illustrating the working

principles of the boards.

5.2 UMPT Added the meanings of bits 3 and 4 of DIP

switch SW1.

5.8 UPEU Modified figures of the UPEUc and UPEUd

panels.

l 5.2 UMPT

l 5.4 LMPT

l 5.5 WBBP

l 5.6 LBBP

Added description of board specifications.

Configuration of BBU Boards in Triple-mode

Base Stations

Added information about a base station in

which two BBUs are working in G*U*L

mode and interconnected by connecting the

UCIU in one BBU and the UMPT in the other

BBU.

No information in Draft A (2013-01-15) is excluded from this issue.

Draft A (2013-01-15)

This is a draft.

Compared with the issues for the multimode base station version V100R007C00 and the single-

mode base stationversions NodeB V200R014C00, BTS V100R014C00, and eNodeB

V100R005C00, this issue includes the following changes:

l Divided information about the BBU3900 board configuration into the following sections:

Configuration of BBU Boards in GSM Base Stations, Configuration of BBU Boards in

UMTS Base Stations, Configuration of BBU Boards in LTE Base Stations, Configuration

of BBU Boards in GU/G*U Base Stations, Configuration of BBU Boards in GL/G*L Base

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Stations, Configuration of BBU Boards in UL/U*L Base Stations and Configuration of

BBU Boards in Triple-mode Base Stations.

l Added the description of the UMPTb1, UMPTb2, and UBRIb.

l Added description of the separate-MPT multimode base stations and co-MPT multimode

base stations.

l Divided the BBU board configurations for GSM BTS into BBU board configurations for

GBTS and eGBTS.

Compared with the issues for the MBTS V100R007C00, NodeB V200R014C00, BTS

V100R014C00, and eNodeB V100R005C00, this issue does not include any new information

or exclude any information.

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2BBU3900 ExteriorBBU3900 has a case structure with a width of 19 in. and a height of 2 U (88.90 mm or 3.50 in.).

The following figure shows the exterior of the BBU3900.

Figure 2-1BBU3900 Exterior

A BBU3900 has a label with the electronic serial number (ESN) printed on it. The position of

the label on a BBU3900 is as follows:

l If there is a label on the FAN unit of the BBU, the ESN is printed on the label and a mounting

ear of the BBU, as shown in the following figure.

Figure 2-2ESN position 1

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l If there is no label on the FAN unit of the BBU, the ESN is printed on a mounting ear of

the BBU, as shown in the following figure.

Figure 2-3ESN position 2

NOTE

The ESN is a unique identifier of a device and is used during base station commissioning.

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3Principles and Functions of a BBU3900A BBU3900 is a baseband processing unit. It processes the baseband signals of a base station.

Principle

The BBU3900 includes the baseband subsystem, cabinet subsystem, transmission subsystem,

interconnection subsystem, main control subsystem, monitoring subsystem, and clock

subsystem, and each subsystem consists of different units or modules as follows:

l The baseband subsystem consists of the baseband processing unit.

l The cabinet subsystem consists of the backplane, fan, and power modules.

l The transmission subsystem consists of the main control transmission unit and transmission

extension unit.

l The interconnection subsystem consists of the main control transmission unitaand

infrastructure interconnection unit.

l The main control subsystem consists of the main control transmission unit.

l The monitoring subsystem consists of the power module and monitoring unit.

l The clock subsystem consists of the main control transmission unit and clock signal

processing unit.

NOTE

a: The main control transmission unit in an interconnection subsystem is the UMPT.

The following figure shows the principle of the BBU3900.

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Figure 3-1Principle of the BBU3900

Function

The BBU3900 performs the following functions:

l Provides ports to be connected to the transmission equipment, RF modules, USB

devicesa, external clock reference, and LMT or M2000 for transmitting signals,

automatically upgrading software, receiving clock reference, and maintaining the BBU on

the LMT or M2000.

l Manages the entire base station system, including the processing of uplink and downlink

data, signaling processing, resource management, and operation and maintenance.

NOTE

a: The security of the USB port is ensured by encryption, and the USB port can be shut down using

commands. The USB commission port is used for commissioning the base station rather than configuring

and exporting information of the base station.

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4Slot Assignment in the BBU3900About This Chapter

This section describes the BBU3900 slot assignment principles.

4.1 BBU SlotDistribution

This section describes the BBU slot distribution.

4.2 BBU SlotAssignment in a GSM Base Station

This section describes the principles for BBU slot assignment in a GSM base station.

4.3 BBU SlotAssignment in a UMTS Base Station

This section describes the principles for BBU slot assignment in a UMTS base station.

4.4 BBU SlotAssignment in an LTE Base Station

This section describes the principles for BBU slot assignment in an LTE base station.

4.5 BBU SlotAssignment in a GU or G*U Base Station

This section describes the principles for BBU slot assignment in a GU or G*U base station.

4.6 BBU SlotAssignment in a GL or G*L Base Station

This section describes the principles for BBU slot assignment in a GL or G*L base station.

4.7 BBU SlotAssignment in a UL or U*L Base Station

This section describes the principles for BBU slot assignment in a UL or U*L base station.

4.8 BBU Slot Assignment in a Triple-Mode Base Station

This section describes the principles for BBU slot assignment in a triple-mode base station.

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4.1 BBU Slot Distribution

This section describes the BBU slot distribution.

A BBU has 11 slots. The following figure shows how they are distributed on a BBU.

Figure 4-1BBU slot distribution

4.2 BBU Slot Assignment in a GSM Base Station

This section describes the principles for BBU slot assignment in a GSM base station.

BBU Slot Assignment in a GBTS

The following figure shows the BBU slot assignment in a GBTS.

Figure 4-2BBU slot assignment

The following table describes the principles for BBU slot assignment.

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Table 4-1Principles for BBU slot assignment

Priority BoardType

Board Mandatory orNot

MaximumQuantit

y

Slot Assignment Sequence(the Leftmost Slot Has theHighest Priority)

1 Main

control

board

GTMU Yes 1 Slot 6

and Slot

5

- -

GTMUb

2 Intercon

nection

board

UCIU No 1 Slot 4 Slot 0 Slot 1

3 Transmi

ssion

board

UTRPc No 2 Slot 4 Slot 0 Slot 1

UTRPb4

4 Satellite-

card

board

USCUb2

2

No 1 Slot 1 - -

USCUb1

4

No 1 Slot 4 Slot 1 Slot 0

5 Baseban

d

processi

ng board

UBRIb No 1 Slot 2 - -

UBRI

The following figure shows the typical configuration of BBU boards.

Figure 4-3Typical configuration of BBU boards

BBU Slot Assignment in an eGBTS

The following figure shows the BBU slot assignment in an eGBTS.

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Priority

BoardType

Board Mandatoryor Not

MaximumQuantity

Slot Assignment Sequence (theLeftmost Slot Has the HighestPriority)

1 Main

control

board

UMPT

b

Yes 1 Slot 7 - - -

2 Satellite-card

board

USCUb22

No 1 Slot 5 Slot 1 - -

USCUb

14

No 1 Slot 5 Slot 4 Slot 1 Slot 0

3 Baseba

nd

process

ing

board

UBRIb No 2 Slot 1 Slot 0 - -

UBRI



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4.3 BBU Slot Assignment in a UMTS Base Station

This section describes the principles for BBU slot assignment in a UMTS base station.

The following figure shows the BBU slot assignment in an UMTS base station.


The following table describes the principles for BBU slot assignment in a UMTS base station.


Priority

BoardType

Board

Mandatory orNot

MaximumQuantity

Slot Assignment Sequence (the LeftmostSlot Has the Highest Priority)

1 Main

contr

ol

board

UMP

Tb

Yes 2 Slot 7 Slot 6 - - - -

UMP

Ta1

WMPT

2 Trans

missi

on

board

UTR

Pc

No 2 Slot 4 Slot5 Slot 0 Slot 1 - -

UTR

P6

UTR

P9

UTR

P2

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Priority

BoardType

Board

Mandatory orNot

MaximumQuantity


UTR

Pa

UTR

P3

UTR

P4

3 Satell

ite-

card

board

USC

Ub22

No 1 Slot 5 Slot 1 - - - -

USCUb14

No 1 Slot 5 Slot 4 Slot 1 Slot 0 - -

4 Base

band

board

witho

ut

additi

onal

CPRI

ports

WBB

Pf

Yes 6 Slot 3 Slot 0 Slot 1 Slot 2 Slot 4 Slot 5

WBB

Pd

WBB

Pb

WBB

Pa

Base

band

board

with

additi

onal

CPRI

ports

WBB

Pf


WBB

Pd

WBB

Pb

WBB

Pa

NOTE

In a UMTS single-mode base station, the UMPT and WMPT cannot be configured in the same BBU.


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4.4 BBU Slot Assignment in an LTE Base Station

This section describes the principles for BBU slot assignment in an LTE base station.

The following figure shows the BBU slot assignment in an LTE base station.




Prior

ity

Boar

dType

Boar

d

Man

datory orNot

Maxi

mumQuantity

Slot Assignment Sequence (the Leftmost

Slot Has the Highest Priority)

1 Main

contr

ol

board

in

LTE

FDD

or

LTE

UMP

Tb


UMP

Ta2/

UMP

Ta6

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Priority

BoardType

Board

Mandatory orNot

MaximumQuantity


TDD

mode

LMP

T

2 Satell

ite-

card

board

USC

Ub22

No 1 Slot 5 Slot 1 - - - -

USC

Ub14


USC

Ub11

3 Base

band

proce

ssing

board

in

LTE

FDD

or

LTE

TDDmode

LBB

Pd


LBB

Pc

NOTE

In an LTE FDD or LTE TDD single-mode base station, the UMPT and LMPT cannot be configured in the

same BBU.



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4.5 BBU Slot Assignment in a GU or G*U Base Station

This section describes the principles for BBU slot assignment in a GU or G*U base station.

BBU Slot Assignment in a GU Base Station

NOTE

l A GU base station is a separate-MPT base station. This means that in one single BBU, there are two

main control boards working in GSM and UMTS modes separately.

l A G*U base station is a co-MPT GU base station. This means that in one single BBU, the main control

board work in GSM and UMTS modes simultaneously.

The following figure shows the BBU slot assignment in a GU base station.




Priority

BoardClassification

Board MandatoryorNot

MaximumQuantity

Slot Assignment Sequence (theLeftmost Slot Has the Highest Priority)

1 Main

contro

l board

in

GSM

mode

GTM

Ub

Yes 1 Slot 6 - - - -

GTM

U

2 Main

contro

l board

in

UMT

UMP

Tb

Yes 1 Slot 7 - - - -

UMP

Ta1

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Priority

BoardClassification


MaximumQuantity


S

mode

WMP

T

3 Trans

missio

n

board

in

GSM

mode

UTRP

b4

No 2 Slot 4 Slot 0 Slot 1 - -

4 Transmissio

n

board

in

UMT

S

mode

UTRPc No 2 Slot 4 Slot 0 Slot 1 - -

UTRP

6

UTRP

9

UTRP

2

UTRP

a

UTRP

3

UTRP

4

5 Satelli

te-

card

board

USCU

b22

No 1 Slot 1 - - - -

USCU

b14


6 Baseb

and

board

in

GSM

mode

UBRI

b

No 1 Slot 2 - - - -

UBRI

7 UMT

S

baseba

nd

board

WBB

Pf

Yes 5 Slot 3 Slot 0 Slot 1 Slot 2 Slot 4

WBB

Pd

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Priority

BoardClassification


MaximumQuantity


not

conne

cting

to

CPRI

cables

WBB

Pb

WBB

Pa

UMT

S

baseba

nd

boardconne

cting

to

CPRI

cables

WBB

Pf


WBB

Pd

WBB

Pb

WBB

Pa



BBU Slot Assignment in a G*U Base Station

The following figure shows the BBU slot assignment in a G*U base station.

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Priority

BoardClassification

Board

Mandatory orNot

MaximumQuantity


1 Main

contr

olboard

in

G*U

mode

UMP

Tb


UMP

Ta1

2 Trans

missi

on

board

UTR

Pc


3 Satell

ite-card

board

USC

Ub22

No 1 Slot 5 Slot 1 - - - -

USC

Ub14


4 Base

band

board

in

GSM

mode

UBRI

b

No 2 Slot 1 Slot 0 - - - -

5 Base

band

WBB

Pf


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Priority

BoardClassific

ation

Board

Mandatory orNot

MaximumQuantity


board

in

UMT

S

mode

WBB

Pd

WBB

Pb

WBB

Pa



4.6 BBU Slot Assignment in a GL or G*L Base Station

This section describes the principles for BBU slot assignment in a GL or G*L base station.

BBU Slot Assignment in a GL Base Station

NOTE

l A GL base station is a separate-MPT base station. This means that in one single BBU, there are two

main control boards working in GSM and LTE modes separately.

l A G*L base station is a co-MPT GL base station. This means that in one single BBU, the main control

board work in GSM and LTE modes simultaneously.

The following figure shows the BBU slot assignment.

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Priority

BoardClassification


MaximumQuantity


1 Main

contro

l board

in

GSMmode

GTM

Ub

Yes 1 Slot 6 - - - -

GTM

U

2 Main

contro

l board

in

LTE

FDD

mode

UMP

Tb

Yes 1 Slot 7 - - - -

UMP

Ta2/

UMP

Ta6

LMPT

3 Trans

missio

n

board

in

GSM

mode

UTRP

b4


4 Satelli

te-

card

board

USCU

b22

No 1 Slot 1 - - - -

USCU

b14


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Priority

BoardClassification


MaximumQuantity


USCU

b11

5 Baseb

and

board

in

GSM

mode

UBRI

b

No 1 Slot 2 - - - -

UBRI

Baseb

andboard

in

LTE

FDD

mode

LBBP

d


LBBP

c



BBU Slot Assignment in a G*L Base Station


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Priority

BoardClassification

Board

Mandatory orNot

MaximumQuantity


1 Main

contr

olboard

in

G*L

mode

UMP

Tb


UMP

Ta2/

UMP

Ta6

2 Trans

missi

on

board

UTR

Pc


3 Satell

ite-card

board

USC

Ub22

No 1 Slot 5 Slot 1 - - - -

USC

Ub14


USC

Ub11

4 Base

band

board

in

GSM

mode

UBRI

b

No 2 Slot 1 Slot 0 - - - -

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Priority

BoardClassific

ation

Board

Mandatory orNot

MaximumQuantity


5 Base

band

board

in

LTE

FDD

or

mode

LBB

Pd


LBB

Pc



4.7 BBU Slot Assignment in a UL or U*L Base Station

This section describes the principles for BBU slot assignment in a UL or U*L base station.

BBU Slot Assignment in a UL Base Station

NOTE

l A UL base station is a separate-MPT base station. This means that in one single BBU, there are two

main control boards working in UMTS and LTE modes separately.

l A U*L base station is a co-MPT UL base station. This means that in one single BBU, the main control

board work in UMTS and LTE modes simultaneously.


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Priority

BoardType


MaximumQuantity


1 Main

contro

l board

inUMT

S

mode

UMP

Tb

Yes 1 Slot 7 - - - -

UMP

Ta1

WMP

T

2 Main

contro

l board

in

LTE

mode

UMP

Tb

Yes 1 Slot 6 - - - -

UMP

Ta2/

UMP

Ta6

LMPT

3 Trans

missio

n

board

in

UMT

S

mode

UTRP

c


UTRP

6

UTRP

9

UTRP

2

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Priority

BoardType


MaximumQuantity


UTRP

a

UTRP

3

UTRP

4

4 Satelli

te-

card

board

USCU

b22

No 1 Slot 1 - - - -

USCUb14


USCU

b11

5 Baseb

and

board

in

UMT

S

mode

WBB

Pf


WBB

Pd

WBB

Pb

WBB

Pa

6 Baseb

and

board

in

LTE

FDD

mode

LBBP

d


LBBP

c



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BBU Slot Assignment in a U*L Base Station





Prior

ity

Boar

dType

Boar

d

Man

datory orNot

Maxi

mumQuantity

Slot Assignment Sequence (the Leftmost

Slot Has the Highest Priority)

1 Main

contr

ol

board

in

U*L

mode

UMP

Tb


UMP

Ta

2 Transmissi

on

board

UTRPc


3 Satell

ite-

card

board

USC

Ub22

No 1 Slot 5 Slot 1 - - - -

USC

Ub14


USC

Ub11

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Priority

BoardType

Board

Mandatory orNot

MaximumQuantity


5 Base

band

board

in

UMT

S

mode

WBB

Pf


WBB

Pd

WBB

Pb

WBB

Pa

5 Baseband

board

in

LTE

FDD

mode

LBBPd


LBB

Pc



4.8 BBU Slot Assignment in a Triple-Mode Base Station

This section describes the principles for BBU slot assignment in a triple-mode base station.

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BBU Slot Assignment in a Triple-Mode Base Station

NOTE

l GU+L indicates two BBUs, one working in GU mode, the other in LTE mode.

lG[U*L] indicates that one single BBU work in triple modes. The BBU is configured with two maincontrol boards. One is the GTMU or GTMUb working in GSM mode, and the other is the UMPT

working in UMTS and LTE modes.

l G*U*L indicates that one single BBU is configured with one UMPT working in triple modes.

The following table describes the BBU slot assignment in a separate-MPT triple-mode base

station in various application scenarios.

Table 4-11BBU slot assignment

Application Scenarios Description

Separate-MPT triple-mode base station

configured with two BBUs

l GU+L (BBUs not interconnected)

l GL+U (BBUs not interconnected)

l For the BBU slot assignment in a GU base

station, see BBU Slot Assignment in a

G*U Base Station.

l For the BBU slot assignment in an LTE

base station, see 4.4 BBU Slot

Assignment in an LTE Base Station.

l For the BBU slot assignment in a GL base

station, see 4.6 BBU Slot Assignment in

a GL or G*L Base Station.

l For the BBU slot assignment in a UMTS

base station, see 4.3 BBU Slot

Assignment in a UMTS Base Station.

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Separate-MPT triple-mode base station

configured with two BBUs

l GU+L (BBUs interconnected)

l GL+U (BBUs interconnected)

l GU+UL (BBUs interconnected)

GU+L (BBUs interconnected):

l In the BBU working in GU mode, except

that the UCIU is newly added, theconfiguration of other boards is the same

as that in BBU Slot Assignment in a G*U

Base Station. The UCIU configuration

principles are as follows:

l In the BBU working in LTE mode, except

that a UMPT must be configured as the

main control board, the configuration of

other boards is the same as that in 4.4 BBU

Slot Assignment in an LTE Base

Station.

GL+U (BBUs interconnected):

l In the BBU working in GL mode, except

that the UCIU is newly added, the

configuration of other boards is the same

as that in 4.6 BBU Slot Assignment in a

GL or G*L Base Station. The UCIU

configuration principles are as follows:

l In the BBU working in UMTS mode, a

UMPT must be configured as the main

control board. The configuration of other

boards is the same as that in 4.3 BBU Slot

Assignment in a UMTS Base Station.

GU+UL (BBUs interconnected):

l In the BBU working in GU mode, except

that the UCIU is newly added, the

configuration of other boards is the same

as that in BBU Slot Assignment in a G*U

Base Station. The UCIU configuration

principles are as follows:

l In the BBU working in UL mode, except

that a UMPT must be configured as the

main control board, the configuration ofother boards is the same as that in 4.7 BBU

Slot Assignment in a UL or U*L Base

Station.

Separate-MPT base station configured with

one BBU

l G[U*L]

For the slot assignment principles of a BBU

in G[U*L] mode, see BBU Slot Assignment

in a G[U*L] Base Station.

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Co-MPT base station configured with one

BBU

l G*U*L

For the slot assignment principles of a BBU

in G*U*L mode, see BBU Slot Assignment

in a G*U*L Base Station.The slot assignment principles of a BBU in

G*U*L mode are the same as those of a BBU

in G*L mode, see BBU Slot Assignment in

a G*L Base Station.

Co-MPT base station configured with two

BBUs, both in G*U*L mode

For details, see Typical Configuration of

BBU Boards in a G*U*L+G*U*L Base

Station (BBUs Interconnected).

The following figure shows configuration principles for the UCIU.

Table 4-12Configuration principles for the UCIU

BoardType


MaximumQuantity

Slot Assignment Priorities (Descending fromLeft to Right)

Interc

onnect

ionboard

UCIU Yes 1 Slot 4 Slot 0 Slot 1 - - -

BBU Slot Assignment in a G[U*L] Base Station




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Priority

BoardType

Board

Mandatory or

Not

MaximumQua

ntity


1 Main

contr

ol

board

in

GSM

mode

GTM

Ub

Yes 1 Slot 6 - - - - -

GTM

U

2 Main

contr

olboard

in

U*L

mode

UMP

Tb

Yes 1 Slot 7 - - - - -

UMP

Ta

3 Trans

missi

on

board

in

GSM

mode

UTR

Pb4

No 2 Slot 4 Slot 0 Slot 1 - - -

4 Satell

ite-

card

board

USC

Ub22

No 1 Slot 1 - - - - -

USC

Ub14

No 1 Slot 4 Slot 1 Slot 0 - - -

USC

Ub11

5 Base

bandboard

in

GSM

mode

UBRI

b

No 1 Slot 2 - - - - -

UBRI

6 Base

band

board

in

UMT

S

mode

WBB

Pf

Yes 4 Slot 3 Slot 0 Slot 1 Slot 4 - -

WBB

Pd

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Priority

BoardType

Board

Mandatory orNot

MaximumQuantity


WBB

Pb

WBB

Pa

7 Base

band

board

in

LTE

FDDmode

LBB

Pd

Yes 5 Slot 3 Slot 1 Slot 2 Slot 0 Slot 4 -

LBB

Pc



BBU Slot Assignment in a G*U*L Base Station



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Priority

BoardType

Board

Mandatory orNot

MaximumQuantity


1 Main

contr

ol

board

UMP

Tb


UMP

Ta

2 Transmissi

on

board

UTRPc

No 1 Slot 4 Slot5 Slot 0 Slot 1 - -

3 Satell

ite-

card

board

USC

Ub22

No 1 Slot 5 Slot 1 - - - -

USC

Ub14


USC

Ub11

4 Base

band

board

in

GSM

mode

UBRI

b

No 2 Slot 1 Slot 0 - - - -

5 Base

band

board

in

UMT

S

mode

WBB

Pf


WBB

Pd

WBB

Pb

WBB

Pa

6 Base

band

board

in

LBB

Pd


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Priority

BoardType

Board

Mandatory orNot

MaximumQuantity


LTE

mode

LBB

Pc



Typical Configuration of BBU Boards in a G*U*L+G*U*L Base Station (BBUsInterconnected)

The following figure shows the typical slot assignment in two interconnected BBUs in G*U*L

+G*U*L mode.

Figure 4-26Typical configuration of BBU boards in a G*U*L+G*U*L base station (BBUs

interconnected)

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5BBU3900 BoardsAbout This Chapter

BBU3900 boards include main processing boards, baseband processing boards, transmission

extension boards, fan modules, power modules, monitoring modules, clock boards with satellite

cards, baseband extension boards, and interconnection boards.

5.1 WMPT

The WCDMA main processing and transmission unit (WMPT) is the main control and

transmission unit for the WCDMA mode.

5.2 UMPTThe Universal Main Processing & Transmission unit (UMPT) is a main control and transmission

unit commonly used by the BBU3900.

5.3 GTMU

The GSM transmission and timing and management unit (GTMU) is the main control and

transmission unit for the GSM mode.

5.4 LMPT

The LTE main processing and transmission unit (LMPT) is the main control and transmission

unit for the LTE mode.

5.5 WBBP

The WCDMA baseband processing unit (WBBP) processes baseband signals for the WCDMAmode.

5.6 LBBP

The LTE BaseBand Processing unit (LBBP) processes baseband signals for LTE.

5.7 FAN

The FAN is a fan unit in the BBU3900.

5.8 UPEU

The Universal Power and Environment interface Unit (UPEU) is a power module in the

BBU3900.

5.9 UEIU

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The Universal Environment Interface Unit (UEIU) is an environment monitoring unit in the

BBU3900.

5.10 UTRP

The Universal Transmission Processing unit (UTRP) in the BBU3900 provides ports for

transmission.

5.11 USCU

This section describes the universal satellite card and clock unit (USCU).

5.12 UBRI

The UBRI and UBRIb are short for universal baseband radio interface board and universal

baseband radio interface board type b, respectively.

5.13 UCIU

The universal inter-connection infrastructure unit (UCIU) interconnects BBUs. It forwards

control and synchronization information from one BBU to another.

5.14 Optical Modules

An optical module transmits optical signals between an optical port and a fiber optic cable.

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5.1 WMPT

The WCDMA main processing and transmission unit (WMPT) is the main control and

transmission unit for the WCDMA mode.

Specifications

The following table lists the transmission specifications of the WMPT.

Table 5-1Transmission specifications of the WMPT

Board ApplicableMode

Transmission Mode

Quantity ofPorts

PortCapacity

Full/Half-Duplex

WMPT UMTS ATM over E1/T1 or IP

over E1/T1

1 Four channels

Full-duplex

Transmissio

n over FE

optical ports

1 10 Mbit/s or

100 Mbit/s

Full-duplex

Transmissio

n over FE

electrical

ports

1 10 Mbit/s or

100 Mbit/s

Full-duplex

NOTE

For the signaling specifications of the combined WMPT boards, see section "Signaling Specifications" in

3900 Series Base Station Technical Description.

Panel

The following figure shows the exterior of the WMPT panel.

Figure 5-1Exterior of the WMPT panel

Function

The WMPT performs the following functions:

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l Performs configuration management, device management, performance monitoring, and

signaling message processing.

l Processes signaling and manages resources for other boards in the BBU.

l Provides the USB port, transmission port, maintenance port to perform signal transmission

and automatic software upgrade, and support BBU maintenance on the LMT or M2000.

Working Principle

The following figure shows the working principle of the WMPT.

Figure 5-2Working principle of the WMPT

Port

The following table describes the ports on the WMPT.

Table 5-2Ports on the WMPT

Silkscreen

Connector Description

E1/T1 DB26 female

connector

E1/T1 signal transmission port

FE0 RJ45 connector FE electrical signal transmission port

FE1 SFP female

connector

FE optical signal transmission port

GPS SMA connector Reserved

ETHa RJ45 connector Local maintenance and commissioning port

TSTb USB connector Port for clock signal outputs

USBc USB connector USB loading port

RST - Used for resetting the board

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Silkscreen

Connector Description

a: Before accessing the base station through the ETH port, ensure that an OM port has been

enabled and the user has obtained required authorities for accessing the base station throughthe OM port.

b: The USB commission port is used for commissioning the base station rather than

configuring and exporting information of the base station.

c: The security of the USB port is ensured by encryption, and the USB port can be shut down

using commands.

Indicators

The following table describes the three status indicators on the WMPT panel.

Table 5-3Status indicators on the WMPT panel

Silkscreen Color Status Description

RUN Green Steady on There is power

supply, but the board

is faulty.

Steady off There is no power

supply, or the board

is faulty.

Blinking (on for 1s

and off for 1s)

The board is running

properly.

Blinking (on for

0.125s and off for

0.125s)

l The board is

being loaded or

configured.

l The board is not

started.

ALM Red Steady on An alarm is

generated, and theboard needs to be

replaced.

Steady off The board is running

properly.

Blinking (on for 1s

and off for 1s)

An alarm is

generated, and you

need to locate the

fault before

determining whether

to replace the board.

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Silkscreen Color Status Description

ACT Green Steady on The board serves as

an active board.

Steady off l The board does

not serve as an

active board.

l The board has not

been activated.

l The board is not

providing any

services.

Blinking (on for

0.125s and off for

0.125s)

The operation and

maintenance link

(OML) isdisconnected.

Blinking (on for 1s

and off for 1s)

The board is being

tested, such as an

RRU Voltage

Standing Wave Ratio

(VSWR) test through

a USB(2)(3)flash

drive.

Besides the preceding three indicators, the WMPT provides six indicators indicating the

connection status of the FE optical port, FE electrical port, and commissioning port. The six

indicators do not have silkscreen on the WMPT panel, whereas they are at both sides of the

corresponding ports, as shown in the following figure.

Figure 5-3Positions of the indicators for ports on the WMPT panel

The following table describes the indicators for ports on the WMPT panel.

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Table 5-4Indicators for ports on the WMPT panel

CorrespondingPort

Color Status Description

Indicators for theFE1 optical port

Green (LINK on theleft)

Steady on The connection is setup successfully.

Steady off No connection is set

up.

Orange (ACT on the

right)

Blinking Data is being

transmitted or

received.

Steady off No data is being

transmitted or

received.

Indicators for the

FE0 electrical port

Green (LINK on the

left)

Steady on The connection is set

up successfully.


up.

Orange (ACT on the

right)


transmitted or

received.


transmitted orreceived.

ETH Green (LINK on the

left)

Steady on The connection is set

up successfully.


up.

Orange (ACT on the

right)


transmitted or

received.

Steady off No data is beingtransmitted or

received.

DIP Switch

There are two DIP switches on the WMPT: SW1 and SW2. The following figure shows the

positions of the DIP switches.

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Figure 5-4Positions of the DIP switches

The DIP switches perform the following functions:

l SW1 is used to select the E1/T1 mode.

l SW2 is used to select the grounding mode of E1/T1 transmission.

Each DIP switch has four bits. Table 5-5, and Table 5-6describe the bit settings and meanings

of the DIP switches.

Table 5-5DIP switch SW1

DIPSwitch

Bit Setting Description

1 2 3 4

SW1 ON ON OFF OFF T1

OFF OFF ON ON The E1

resistance is

set to 120

ohms.

ON ON ON ON The E1

resistance is

set to 75

ohms.

Others Unavailable

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DIPSwitch


1 2 3 4

SW2 OFF OFF OFF OFF Balanced

ON ON ON ON Unbalanced

Others Unavailable

5.2 UMPT

The Universal Main Processing & Transmission unit (UMPT) is a main control and transmission

unit commonly used by the BBU3900.

Specifications

The following table lists the transmission specifications of the UMPT.

Table 5-7Transmission specifications of the UMPT

Board SupportedMode

Transmission Mode

PortQuantity

PortCapacity

Full/Half-Duplex

UMPTa1 l

UMTSsingle-

mode

l Co-MPT

multimod

e

including

UMTS

ATM overE1/T1 or IP

over E1/T1

1 Four channels -

Transmissio

n over FE/

GE electrical

ports

1 10 Mbit/s,

100 Mbit/s,

or 1000

Mbit/s

Full-duplex

Transmissio

n over FE/

GE optical

ports

1 100 Mbit/s or

1000 Mbit/s

Full- or half-

duplex

UMPTa2 l LTE

FDD

only

l Co-MPT

multimod

e

including

LTE

FDD

IP over E1/

T1

1 Four

channels

-

Transmissio

n over FE/

GE electrical

ports

1 10 Mbit/s,

100 Mbit/s,

or 1000

Mbit/s

Full-duplex

Transmissio

n over FE/

GE optical

ports

1 100 Mbit/s or

1000 Mbit/s

Full- or half-

duplex

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Board SupportedMode

Transmission Mode

PortQuantity

PortCapacity

Full/Half-Duplex

UMPTa6 l LTE

TDDonly

l Co-MPT

multimod

e

including

LTE

TDD

IP over E1/

T1

1 Four

channels

-

Transmissio

n over FE/

GE electrical

ports

1 10 Mbit/s,

100 Mbit/s,

or 1000

Mbit/s

Full-duplex

Transmissio

n over FE/

GE optical

ports

1 100 Mbit/s or

1000 Mbit/s

Full- or half-

duplex

UMPTb1/

UMPTb2

l GSM

single-

mode

l UMTS

single-

mode

l LTE

FDD

only

l LTE

TDD

onlyl Co-MPT

multimod

e

including

any mode

ATM over

E1/T1aor IP

over E1/T1

1 Four

channels

-

Transmissio

n over FE/

GE electrical

ports

1 10 Mbit/s,

100 Mbit/s,

or 1000

Mbit/s

Full-duplex

Transmissio

n over FE/

GE optical

ports

1 100 Mbit/s or

1000 Mbit/s

Full- or half-

duplex

a: ATM over E1/T1 is supported only in UMTS single-mode or co-MPT multimode including

UMTS.

The following table lists the carrier specifications of the UMPTb1 working in GSM mode.

Table 5-8Carrier specifications of the UMPT

Board Supported Mode TransmissionMode

MaximumNumber ofSupportedCarriers

UMPTb1 GSM IP over E1 or IP over

FE

72

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The following table lists the signaling specifications of the UMPTa2/UMPTa6/UMPTb2/

UMPTb1 working in LTE mode.

Table 5-9Signaling specifications

Board Signaling Specification (CAPS)

UMPTa2/UMPTa6/UMPTb2/UMPTb1 120

The following table lists the maximum RRC_CONNECTED UEs supported by the UMPTa2/

UMPTa6/UMPTb2/UMPTb1 working in LTE mode.

Table 5-10Maximum RRC_CONNECTED UEs

Board Maximum RRC_CONNECTED UEs

UMPTa2/UMPTa6/UMPTb2/UMPTb1 10800

The maximum number of data radio bearers supported by the UMPTa2/UMPTa6/UMPTb2/

UMPTb1 working in LTE mode is three times the maximum number of RRC_CONNECTED

UEs.

NOTE

For the overall signaling specifications of an eNodeB or NodeB, see section "Signaling Specifications" in

3900 Series Base Station Technical Description. For the data radio bearer (DRB) and maximum number

of UEs in RRC_CONNECTED mode, see section "Baseband Specifications" in 3900 Series Base Station

Technical Description.

Panel

Figure 5-5, Figure 5-6, Figure 5-7, Figure 5-8, and Figure 5-9show the panels of the UMPT

boards.

NOTE

In the lower left of the UMPTa1, UMPTa2, UMPTa6, UMPTb1, and UMPTb2, there are silkscreens

UMPTa1, UMPTa2, UMPTa6, UMPTb1, and UMPTb2, respectively, indicating their board types.

Figure 5-5UMPTa1 panel


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Figure 5-8UMPTb1 panel

Figure 5-9UMPTb2 panel

Function

The UMPT performs the following functions:

l Performs configuration management, device management, performance monitoring, and

signaling processing.

l Processes signaling and manages resources for other boards in the BBU.

l Provides the USB port, transmission port, maintenance port for transmitting signals,automatically upgrading software, and maintaining the BBU on the LMT or M2000.

Principle

The following figure shows the working principle of the UMPT.

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Figure 5-10Working principle of the UMPT

Port

The following table describes the ports on the panel of the UMPT.

Table 5-11Ports on the panel of the UMPT

Silkscreen Connector Description

E1/T1 DB26 female

connector

E1/T1 signal transmission port

FE/GE0 RJ45 connector FE electrical signal transmission port

FE/GE1 SFP female

connector

FE optical signal transmission port

GPS SMA connector The GPS ports on the UMPTa1, UMPTa2, and

UMPTb1 are reserved.

The GPS ports on the UMPTa6 and UMPTb2 are

used for transmitting radio frequency (RF) signals

received from the antenna to the satellite card.

USBa USB connector A USB flash drive can be inserted into this port

for upgrading the software of the base station.

This port also functions as a commissioning

Ethernet portb.

CLK USB connector l Receives TOD signals.

l Port for clock signal outputs.

CI SFP female

connector

Used for BBU interconnection.

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Silkscreen Connector Description

RST - Used for resetting the board.

a: The security of the USB port is ensured by encryption, and the USB port can be shut down

using commands.

b: When the USB port functions as a commissioning Ethernet port, ensure that an OM port

has been opened and the user has obtained required authorities for accessing the base station

through the OM port before accessing the base station through the USB port.

Indicator

The following table describes the three status indicators on the UMPT panel.

Table 5-12Status indicators on the UMPT

Silkscreen Color State Description

RUN Green Steady on There is power

supply, but the board

is faulty.

Steady off There is no power

supply, or the board

is faulty.

Blinking (on for 1sand off for 1s)

The board is runningproperly.

Blinking (on for

0.125s and off for

0.125s)

l The board is

being loaded or

configured.

l The board is not

started.

ALM Red Steady on An alarm is

generated, and the

board needs to be

replaced.

Steady off The board is running

properly.

Blinking (on for 1s

and off for 1s)

An alarm is

generated, and you

need to locate the

fault before

determining whether

to replace the board.

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ACT Green Steady on The board serves as

an active board.

Steady off l The board does

not serve as an

active board.

l The board has not

been activated.

l The board is not

providing any

services.

Blinking (on for

0.125s and off for

0.125s)

The operation and

maintenance link

(OML) isdisconnected.

Blinking (on for 1s

and off for 1s)

The board is being

tested, such as an

RRU Voltage

Standing Wave Ratio

(VSWR) test through

a USBaflash drive.

NOTE

Only the UMPTb1

working in UMTS

mode and the

UMPTa1 have this

indicator status.

In every 4s, the

indicator is on for

0.125s and off for

0.125s (eight times)

in the first 2s and then

off for 2s.

l All cells

configured in the

subrack that

houses this board

are not activated.

l The S1 link is

faulty.

NOTEOnly the UMPTb1

working in LTE mode

and the UMPTa2 and

UMPTa6 have this

indicator status.

a: The security of the USB port is ensured by encryption, and the USB port can be shut down

using commands.

Besides the preceding three indicators, some other indicators indicate the connection status of

the FE/GE optical port, FE/GE electrical port, interconnection port, and E1/T1 port. The

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indicators that indicate the connection status of the FE/GE optical port and FE/GE electrical port

are on both sides of the corresponding ports and have no silkscreen, as shown in the following

figure.

Figure 5-11Indicators for ports

The following table describes the indicators for ports.

Table 5-13Port status indicators

CorrespondingPort/Silkscreen

Color State Description

FE/GE optical port Green (LINK on the

left)

Steady on The connection is

normal.

Steady off The connection is

abnormal.

Orange (ACT on theright)

Blinking Data is beingtransmitted.


transmitted.

FE/GE electrical port Green (LINK on the

left)

Steady on The connection is

normal.

Steady off The connection is

abnormal.

Orange (ACT on the

right)


transmitted.


transmitted.

CI Red or green Steady green The interconnection

link is normal.

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Steady red An optical module

fails to transmit orreceive signals due to

one of the following

reasons:

l The optical

module is faulty.

l The fiber optic

cable is broken.

Blinking red (on for

0.125s and off for

0.125s)

Cables are connected

in one of following

incorrect manners:

l The S0 port on the

UCIU in one

BBU connects to

the CI port on

UMPT in the

other BBU, and

indicators for all

incorrectly

connected ports

are blinking.

lThe ports areconnected in ring

topology.

Indicators for all

incorrectly

connected ports

are blinking.

Steady off The optical module

cannot be detected.

L01 Red or green Steady off E1/T1 links 0 and 1

are not set up, or aLoss Of Signal

(LOS) alarm is

generated.

Steady green E1/T1 links 0 and 1

are working

properly.

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Blinking green (on

for 1s and off for 1s)

E1/T1 link 0 is

working properly,but E1/T1 link 1 is

not set up or an LOS

alarm is generated.

Blinking green (on

for 0.125s and off for

0.125s)

E1/T1 link 1 is

working properly,

but E1/T1 link 0 is


alarm is generated.

Steady red Alarms are generated

on both E1/T1 links 0and 1.


1s and off for 1s)

An alarm is

generated on E1/T1

link 0.


0.125s and off for

0.125s)

An alarm is

generated on E1/T1

link 1.

L23 Red or green Steady off E1/T1 links 2 and 3

are not set up, or an

LOS alarm isgenerated.

Steady green E1/T1 links 2 and 3

are working

properly.

Blinking green (on

for 1s and off for 1s)

E1/T1 link 2 is

working properly,

but E1/T1 link 3 is


alarm is generated.

Blinking green (on

for 0.125s and off for

0.125s)

E1/T1 link 3 is

working properly,

but E1/T1 link 2 is


alarm is generated.

Steady red Alarms are generated

on both E1/T1 links 2

and 3.

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1s and off for 1s)

An alarm is

generated on E1/T1link 2.


0.125s and off for

0.125s)

An alarm is

generated on E1/T1

link 3.

There are three indicators (R0, R1, and R2) that indicate in which mode the UMPT is working.

The following table lists the meanings of the indicators.

Table 5-14Mode indicators on the UMPT


R0 Red or green Steady off The board is not

working in GSM

mode.

Steady green The board is working

in GSM mode.

Steady red Reserved


working in UMTS

mode.


in UMTS mode.

Steady red Reserved


working in LTE

mode.


in LTE mode.

Steady red Reserved

DIP Switch

Two DIP switches on the UMPTa1, UMPTa2, and UMPTa6 are labeled SW1 and SW2,

respectively. Figure 5-12shows the positions of DIP switches on these boards. A DIP switch

on the UMPTb1 and UMPTb2 is labeled SW2. Figure 5-13shows the positions of the DIP

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switch on these boards. The functions and meaning of SW2 on the UMPTa and UMPTb series

boards are the same.

Figure 5-12Positions of DIP switches on the UMPTa series boards

Figure 5-13Positions of the DIP switch onthe UMPTb series boards

The DIP switches perform the following functions:

l SW1 is used to select the E1/T1 mode.

l SW2 is used to select the grounding mode of E1/T1 transmission.

Each DIP switch has four bits. Table 5-15and Table 5-16describe the bit settings and meanings

of the DIP switches.


DIPSwitch


1 2 3 4

SW1 ON ON Reserved Reserved The E1 resistance is set to

75 ohms.

OFF ON The E1 resistance is set to

120 ohms.

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DIPSwitch


1 2 3 4

ON OFF The T1 resistance is set to

100 ohms.


DIPSwitch


1 2 3 4

SW2 OFF OFF OFF OFF Balanced

ON ON ON ON Unbalanced

5.3 GTMU

The GSM transmission and timing and management unit (GTMU) is the main control and

transmission unit for the GSM mode.

Specifications

The GTMU is classified into two types: GTMU and GTMUb. The following table lists theirtransmission specifications of the GTMU and GTMUb.

Table 5-17Transmission specifications of the GTMU and GTMUb

Board ApplicableMode

Transmission Mode

Quantity ofPorts

BBU3900 Hardware Description(V100R008C00_05)(PDF)-En

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