Huawei Airbridge DBS3900 Guide

DBS3900
V100R005C00
RRU3253 Hardware Description
Issue 01
Date 2012-11-30
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
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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
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The information in this document is subject to change without notice. Every effort has been made in the
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Huawei Technologies Co., Ltd.
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Email: [email protected]
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About This Document
Purpose
This document provides reference for planning and deploying an RRU3253 (referred to as RRU
in this document). It presents the exterior and describes the ports, functions, cable types,
connector specifications, and cable connections of the remote radio unit (RRU).
Product Version
The following table lists the product version related to this document.
Product Name Product Version
DBS3900 LTE TDD V100R005C00 and later versions
Intended Audience
This document is intended for:
lBase station installation engineers
lSystem engineers
lSite maintenance engineers
Organization
1 Change History
This chapter describes changes in the RRU3253 Hardware Description.
2 RRU Introduction
This chapter describes the RRU.
3 RRU Cables
This chapter describes RRU cables.
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Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Indicates a hazard with a high level of risk, which if not
avoided, will result in death or serious injury.
Indicates a hazard with a medium or low level of risk, which
if not avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation, which if not
avoided, could result in equipment damage, data loss,
performance degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save
time.
Provides additional information to emphasize or supplement
important points of the main text.
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.
Convention Description
Boldface The keywords of a command line are in boldface.
Italic Command arguments are in italics.
[ ] Items (keywords or arguments) in brackets [ ] are optional.
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Convention Description
{ 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
The GUI conventions that may be found in this document are defined as follows.
Convention Description
Boldface Buttons, menus, parameters, tabs, window, and dialog titles
are in boldface. For example, click OK.
>Multi-level menus are in boldface and 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 Enter and press Tab.
Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt
+A means the three keys should be pressed concurrently.
Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means
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.
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Action Description
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 Change History..............................................................................................................................1
2 RRU Introduction..........................................................................................................................2
2.1 RRU Exterior......................................................................................................................................................3
2.2 RRU Ports...........................................................................................................................................................4
2.3 RRU Indicators...................................................................................................................................................5
3 RRU Cables.....................................................................................................................................7
3.1 RRU Cable List..................................................................................................................................................8
3.2 RRU PGND Cable..............................................................................................................................................8
3.3 RRU Power Cable..............................................................................................................................................9
3.4 CPRI Fiber Optic Cable....................................................................................................................................10
3.5 RRU RF Jumper...............................................................................................................................................13
3.6 RRU Alarm Cable............................................................................................................................................13
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1 Change History
This chapter describes changes in the RRU3253 Hardware Description.
01 (2012-11-30)
This is the first official release.
Compared with draft A (2012-09-20), this issue does not include any new information.
Compared with draft A (2012-09-20), this issue does not include any changes.
No information in draft A (2012-09-20) is deleted from this issue.
Draft A (2012-09-20)
This is a draft.
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2 RRU Introduction
About This Chapter
This chapter describes the RRU.
The RRU performs the following functions:
lExchanges baseband data with a BBU.
lReceives RF signals from the antenna system, converts the received signals into IF signals,
amplifies the IF signals, and performs analog-to-digital conversion. The TX channel filters
downlink signals, performs digital-to-analog conversion, and converts IF signals into
signals applicable to the TX band.
lMultiplexes RX and TX signals on the RF channel, which enables these signals to share
the same antenna path. It also filters RX and TX signals.
2.1 RRU Exterior
This section describes the exterior and dimensions of an RRU.
2.2 RRU Ports
This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity
panel, and indicator panel.
2.3 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
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2.1 RRU Exterior
This section describes the exterior and dimensions of an RRU.
Figure 2-1 shows an RRU.
Figure 2-1 RRU exterior
Figure 2-2 shows RRU dimensions.
Figure 2-2 RRU dimensions
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2.2 RRU Ports
This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity
panel, and indicator panel.
Figure 2-3 shows the ports on the RRU panels.
Figure 2-3 Ports on the RRU panels
Table 2-1 describes ports and indicators on the RRU panels.
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Table 2-1 Ports and indicators on the RRU panels
Item Label Description
(1) Ports at the bottom ANT1-ANT8 TX/RX ports
RET/EXT_ALM Port for alarm reporting
CAL Calibration port, supporting on-off-keying
(OOK) signal transmission
(2) Ports in the cabling
cavity
CPRI0/IR0 Optical port
CPRI1/IR1
RTN(+) Power supply socket
NEG(-)
(3) Indicators RUN For details, see 2.3 RRU Indicators.
ALM
ACT
VSWR
CPRI0/IR0
CPRI1/IR1
2.3 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
For the specific positions of RRU indicators, see 2.2 RRU Ports.
Table 2-2 describes RRU indicators.
Table 2-2 Indicators on the RRU
Label Color Status Description
RUN Green Steady on There is power supply, but the module
is faulty.
Steady off There is no power supply, or the
module is faulty.
Blinking on for 1s and off
for 1s
The module is working properly.
Blinking on for 0.125s and
off for 0.125s
Software is being loaded to the
module, or the module is not started.
ALM Red Steady on Alarms are generated, and the module
must be replaced.
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Label Color Status Description
Steady off No alarm is generated.
Blinking on for 1s and off
for 1s
Alarms are generated. The alarms
may be caused by the faults on the
related modules or ports. Therefore,
the necessity for module replacement
is uncertain.
ACT Green Steady on The module is working properly with
TX channels enabled or software is
being loaded without RRU running.
Blinking on for 1s and off
for 1s
The module is working properly with
TX channels disabled.
VSWR Red Steady off No VSWR alarm is generated.
Steady on A VSWR alarm is generated.
CPRI0/
IR0
Red or
green
Steady green The Ir link is functioning properly.
Steady red An optical module fails to transmit or
receive signals possibly because the
optical module is faulty or the optical
fiber cable is broken.
Blinking red on for 1s and
off for 1s
The Ir link is out of lock possibly
because of mutual lock of dual-mode
clock sources or mismatched data
rates over Ir ports. (You are advised
to check the system configuration to
rectify the fault.)
Steady off The SFP module is not properly
installed, or the optical module is
powered off.
CPRI1/
IR1
Red or
green
Steady green The Ir link is functioning properly.
Steady red An optical module fails to transmit or
receive signals possibly because the
optical module is faulty or the optical
fiber cable is broken.
Blinking red on for 1s and
off for 1s
The Ir link is out of lock possibly
because of mutual lock of dual-mode
clock sources or mismatched data
rates over Ir ports. (You are advised
to check the system configuration to
rectify the fault.)
Steady off The SFP module is not properly
installed, or the optical module is
powered off.
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3 RRU Cables
About This Chapter
This chapter describes RRU cables.
3.1 RRU Cable List
This section describes RRU cable connections.
3.2 RRU PGND Cable
An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the
RRU.
3.3 RRU Power Cable
An RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power into an RRU.
3.4 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
3.5 RRU RF Jumper
A 1/2" RRU RF jumper transmits and receives RF signals.
3.6 RRU Alarm Cable
An RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an external
device to RRUs so that the base station can monitor the operating status of external devices.
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3.1 RRU Cable List
This section describes RRU cable connections.
Table 3-1 lists RRU cables.
Table 3-1 RRU cables
Cable One End The Other End
Connector Installation
Position
Connector Installation
Position
3.2 RRU
PGND Cable
OT terminal
(M6)
Ground
terminal on the
RRU
OT terminal (M8) Ground terminal
on the ground bar
3.3 RRU
Power Cable
Easy power
receptacle
(pressfit type)
connector
NEG(-) and
RTN(+) ports
on the RRU
Easy power
receptacle
(pressfit type)
connector
RRU0 to RRU5
on the EPS or
EPU
OT terminal (M4) LOAD0 to
LOAD5 ports on
the DCDU
3.4 CPRI
Fiber Optic
Cable
DLC connector CPRI0/IR0 port
on the RRU
DLC connector Ir port on the
LBBP in the BBU
3.5 RRU RF
Jumper
Type N
connector
ANT1 to ANT8
ports on the
RRU,CAL port
on the RRU
Type N connector Antenna system
3.6 RRU
Alarm Cable
DB9 connector RET/
EXT_ALM port
on the RRU
Cord end terminal External alarm
device
3.2 RRU PGND Cable
An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the
RRU.
Exterior
An RRU PGND cable is green or green and yellow, both ends of the cable are OT terminals. If
the customer prepares the PGND cable, a copper-core cable with a minimum cross-sectional
area of 16 mm2 (0.025 in.2) is recommended. Figure 3-1 shows a PGND cable.
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Figure 3-1 PGND cable
(1) OT terminal (M6) (2) OT terminal (M8)
OT terminals must be added to both ends of a PGND cable onsite.
3.3 RRU Power Cable
An RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power into an RRU.
Exterior
An RRU power cable has an easy power receptacle (pressfit type) connector at one end and bare
wires at the other end. Proper terminals are added to the bare wires based on the connector on
the external power device, as shown in Figure 3-2.
The cross-sectional area of an RRU power cable can be either 3.3 mm2 (0.005 in.2)/5.3 mm2
(0.008 in.2) or 4 mm2 (0.006 in.2)/6 mm2 (0.009 in.2). The former complies with North American
standards and the latter complies with European standards.
Figure 3-2 RRU power cable
Pin Assignment
The DC power input cable is a two-wire cable. Table 3-2 and Table 3-3 describe the pin
assignment for the wires of a DC power input cable.
Table 3-2 Pin assignment for the wires of a DC power input cable (North American standards)
Wire Color
NEG(-) Blue
RTN(+) Black
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Table 3-3 Pin assignment for the wires of a DC power input cable (European standards)
Wire Color
NEG(-) Blue
RTN(+) Brown
3.4 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
NOTE
lAn ODF can be used when the distance between a BBU and an RRU or the distance between
interconnected RRUs is longer than 100 m (328.08 ft).
lA single-mode fiber optic cable connects a BBU to an ODF or connects an ODF to an RRU.
The maximum length of a CPRI fiber optic cable is 150 m (492.12 ft) When the fiber optical
cable connects a BBU and an RRU. The length of a CPRI fiber optic cable is 10 m (32.81 ft)
when the fiber optical cable connects two RRUs.
Exterior
Figure 3-3 shows a fiber optic cable between a BBU and an RRU or between RRUs, with a
DLC connector at each end.
Figure 3-3 Fiber optical cable between a BBU and an RRU or between RRUs
(1) DLC connector (2) Branch optical fiber (3) Label on the branch optical fiber
When a fiber optical cable connects a BBU and an RRU, the optical fibers on the BBU side and
RRU side are 0.34 m (0.013 in.) and 0.03 m (0.0012 in.) long, respectively. When a fiber optical
cable connects two RRUs, the optical fibers on both RRU sides are 0.03 m (0.0012 in.) long.
Figure 3-4 shows the connections for a CPRI fiber optic cable between a BBU and an RRU.
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Figure 3-4 Connections for a CPRI fiber optic cable between a BBU and an RRU
(1) CPRI fiber optic cable between a BBU and an RRU
Figure 3-5 shows a single-mode fiber optic cable between a BBU and an ODF or between an
ODF and an RRU, with a DLC connector at one end and an FC connector at the other end.
Figure 3-5 Single-mode fiber optic cable between a BBU and an ODF or between an ODF and
an RRU
(1) DLC connector (2) Branch optical fiber
(3) Label on the branch optical fiber (4) FC connector
When a single-mode fiber optic cable connects a BBU and an ODF, the optical fibers on the
BBU side and ODF side are 0.34 m (0.013 in.) and 0.8 m (0.031 in.) long, respectively.
When a single-mode fiber optic cable connects an ODF and an RRU, the optical fibers on the
RRU side and ODF side are 0.03 m (0.013 in.) and 0.8 m (0.031 in.) long, respectively.
Figure 3-6 shows the connections for a single-mode CPRI fiber optic cable between a BBU and
an ODF or between an ODF and an RRU.
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Figure 3-6 Connections for a single-mode fiber optic cable between a BBU and an ODF or
between an ODF and an RRU
(1) Single-mode CPRI fiber optic cable between a BBU
and an ODF
(2) Single-mode CPRI fiber optic cable between an
ODF and an RRU
NOTE
A CPRI fiber optic cable must be connected to optical modules in the CPRI ports. A multi-mode fiber optic
cable and single-mode fiber optic cable are connected to multi-mode optical modules and single-mode optical
modules, respectively.
Pin Assignment
Table 3-4, Table 3-5, and Table 3-6 describe the labels on and recommended connections for
fiber optic cables of an optical assembly.
Table 3-4 Labels on and recommended connections for optical fibers of an optical assembly
between a BBU and an RRU
Label Connected To
1A CPRI RX port on the RRU
1B CPRI TX port on the RRU
2A TX port on the BBU
2B RX port on the BBU
Table 3-5 Labels on and recommended connections for optical fibers of a fiber optic cable
between RRUs
Label Connected To
1A CPRI RX port on RRU 1
1B CPRI TX port on RRU 1
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Label Connected To
2A CPRI TX port on RRU 0
2B CPRI RX port on RRU 0
Table 3-6 Labels on and recommended connections for optical fibers of a single-mode optical
assembly between a BBU and an ODF or between an ODF and an RRU
Label Connected To
1A RX port on the BBU or CPRI RX port on the RRU
1B TX port on the BBU or CPRI TX port on the RRU
2A ODF
2B ODF
3.5 RRU RF Jumper
A 1/2" RRU RF jumper transmits and receives RF signals.
Exterior
An RF jumper has a Type N male connector at both ends, as shown in Figure 3-7.
Figure 3-7 RF jumper
(1) Type N male connector
3.6 RRU Alarm Cable
An RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an external
device to RRUs so that the base station can monitor the operating status of external devices.
Exterior
An alarm cable has a DB9 connector at one end and eight cord end terminals at the other end,
as shown in Figure 3-8.
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