AAU5835f
Hardware Description
Issue
Draft A
Date
2021-10-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2021. All rights reserved.
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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
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Huawei Technologies Co., Ltd.
Address:
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Website:
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Email:
support@huawei.com
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AAU5835f
Hardware Description
Contents
Contents
1 AAU5835f Hardware Description.........................................................................................1
1.1 Changes in AAU5835f Hardware Description................................................................................................................2
1.2 AAU.............................................................................................................................................................................................. 2
1.2.1 AAU Exterior.......................................................................................................................................................................... 2
1.2.2 AAU Functions...................................................................................................................................................................... 5
1.2.3 AAU Technical Specifications........................................................................................................................................... 8
1.2.4 AAU Ports and Indicators.................................................................................................................................................. 8
1.2.5 AAU Angle Adjustment System.................................................................................................................................... 11
1.2.6 Optical Modules................................................................................................................................................................. 13
1.3 AAU Cables............................................................................................................................................................................. 15
1.3.1 AAU Cable List.................................................................................................................................................................... 15
1.3.2 AAU PGND Cable...............................................................................................................................................................16
1.3.3 AAU Power Cable.............................................................................................................................................................. 16
1.3.4 CPRI Optical Fiber............................................................................................................................................................. 18
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AAU5835f
Hardware Description
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AAU5835f Hardware Description
Overview
This document provides reference for planning and deploying an active antenna
unit 5835f (AAU5835f, which is referred to as AAU in this document). It describes
the exterior, functions, technical specifications, ports, indicators, angle adjustment
system, optical modules, and cables of the AAU.
Product Versions
The following table lists the product versions related to this document.
Product Name
Solution Version
Product Version
AAU5835f
SRAN17.1 and later
V100R017C10 and later
For details about the software
versions of RF modules, see the
related software and hardware
compatibility description.
Intended Audience
●
System engineers
●
Installation engineers
●
Maintenance engineers
Organization
1.1 Changes in AAU5835f Hardware Description
This section describes the changes in AAU5835f Hardware Description.
1.2 AAU
An AAU integrates the antenna and RF unit. The AAU5835f consists of the active
module and passive antenna.
1.3 AAU Cables
This section describes the cables connected to an AAU.
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AAU5835f
Hardware Description
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1.1 Changes in AAU5835f Hardware Description
This section describes the changes in AAU5835f Hardware Description.
Draft A (2021-10-30)
This is a draft.
1.2 AAU
An AAU integrates the antenna and RF unit. The AAU5835f consists of the active
module and passive antenna.
1.2.1 AAU Exterior
This section describes the AAU exterior.
Figure 1-1 shows the AAU exterior.
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Figure 1-1 AAU exterior
(1) Active module
(2) Passive antenna (also
called passive module)
(3) Upper handle
(4) Lower handle
(5) Upper attachment
plate of the active
module
(6) Lower attachment
plate of the active
module
Figure 1-2 shows the AAU dimensions.
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Figure 1-2 AAU dimensions
You can obtain the module name on the AAU nameplate, as shown in Figure 1-3.
NOTE
The nameplate on the AAU in the figure is only for reference.
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Figure 1-3 Nameplate position
1.2.2 AAU Functions
The AAU logically consists of the active module and the passive antenna.
The main function modules of the active module include the antenna unit (AU),
radio unit (RU), power module, and L1 processing unit. Figure 1-4 shows the
logical structure.
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Figure 1-4 Logical structure of the active module
Table 1-1 describes the logical structure of the active module.
Table 1-1 Logical structure of the active module
Function
Module
Function Description
Antenna
Each antenna uses an 8x12 array and supports 96 dualpolarized elements to transmit and receive radio waves.
RF unit
The RF unit consists of the following function modules:
● CPRI port and digital intermediate frequency (IF): CPRI
signal transmission and digital IF processing
● ADC and DAC: analog-to-digital conversion (using the ADC)
and digital-to-analog conversion (using the DAC) (ADC is
short for analog-to-digital converter and DAC is short for
digital-to-analog converter.)
● Low-power RF signal: down-conversion and amplification for
RF signals; up-conversion and amplification for analog
signals
● Power amplifier (PA): signal power amplification
● Filter: protection and filtering
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Function
Module
Function Description
Power
module
Supplies operating voltage to the AU and RU.
L1 (physical
layer)
processing
unit
● Provides enhanced common public radio interface (eCPRI)
ports to converge and distribute eCPRI signals.
● Implements the uplink and downlink processing at the NR
physical layer.
● Performs I/Q modulation, mapping, and digital weighting in
the downlink.
The passive antenna provides passive ports for external RRUs. Figure 1-5 shows its
logical structure.
Figure 1-5 Logical structure of the passive antenna
NOTE
● The red parts represent arrays whose operating frequency band is 690–960 MHz. The
yellow parts y2 and y3 represent arrays whose operating frequency band is 1427–2690
MHz.
● y1 and b1 as well as y4 and b2 form arrays in different operating frequency bands.
Specifically, the yellow parts y1 and y4 represent arrays whose operating frequency
band is 2490–2690 MHz, and the blue parts b1 and b2 represent arrays whose operating
frequency band is 1695–2200 MHz.
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1.2.3 AAU Technical Specifications
This section describes AAU technical specifications, including supported RATs,
frequency bands, RF specifications, engineering specifications, antenna capabilities,
and CPRI port specifications.
For details about AAU technical specifications, see AAU5835f Technical
Specifications.
1.2.4 AAU Ports and Indicators
This section describes the physical ports and indicators on an AAU.
Figure 1-6 shows the physical ports and indicators on an AAU.
Figure 1-6 Physical ports and indicators
NOTE
● L Indicates left antenna or left array. R indicates right antenna or right array. CL
indicates central left antenna. CR indicates central right antenna.
● r indicates red. b indicates blue. y indicates yellow.
● 8T8R is supported when 8T8R-A and 8T8R-B are used together, that is, RF ports 5 and 6
or RF ports 6 and 7 are connected. For details, see the AAU5835f Technical
Specifications.
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Table 1-2 SNs of the ports at the bottom of the wireless antenna
RF Port Number
SNa
1 and 2
RET SN: HWxxxxxxxxxxxxxxLr1
3 and 4
RET SN: HWxxxxxxxxxxxxxxRr2
5
RET SN: HWxxxxxxxxxxxxxxLb1, HWxxxxxxxxxxxxxxRb2
6
RET SN: HWxxxxxxxxxxxxxCLy2, HWxxxxxxxxxxxxxCRy3
7
RET SN: HWxxxxxxxxxxxxxxLy1, HWxxxxxxxxxxxxxxRy4
5 and 6
RAE SN: HWxxxxxxxxxxx0bxy23
6 and 7
RAE SN: HWxxxxxxxxxxx0y1234
a: The characters x are pad characters in the SN.
Physical Ports
Table 1-3 describes the physical ports on an AAU.
Table 1-3 Physical ports
Silkscreen
Description
CPRI1
Optical port 1 with a maximum data rate of 25 Gbit/s. An
optical module must be inserted into the port for optical
fiber installation.
CPRI0
Optical port 0 with a maximum data rate of 25 Gbit/s. An
optical module must be inserted into the port for optical
fiber installation.
PWR
–48 V DC power port
AUX
Port for connecting to an external antenna information
sensor unit (AISU) to transmit Antenna Interface Standards
Group (AISG) signals
TEST
Reserved port, which is unavailable
AISG IN1
RET ports connected to the RET ports on external passive
modules
AISG IN2
AISG OUT1
AISG OUT2
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RET cascading ports connected to the RET ports on external
RET antennas so that the passive modules can adjust the
tilts of the cascaded antennas
CAL
Calibration port (used with a 4.3-10 female connector),
supporting RF signals and RET antenna control signals
1 to 4
RF ports (used with 4.3-10 female connectors) for
connecting to external RRUs
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Silkscreen
Description
5 to 7
RF ports (used with MQ4 connectors) for connecting to
external RRUs
Indicators
Table 1-4 describes the indicators on an AAU.
Table 1-4 Indicators
Silkscree
n
Color
Status
Meaning
RUN
Green
Steady on
Power is supplied, 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)
The module software is being loaded
or the module is not working.
Steady on
An alarm is generated, and the module
must be replaced.
Blinking (on for
1s and off for
1s)
An alarm is generated. The alarm may
be caused by a fault on a related
module or port. Locate the fault before
deciding whether to replace the
module.
Steady off
No alarm is generated.
Steady on
The module is working properly when
TX channels are enabled or when
software is being loaded to the module
that is not started.
Blinking (on for
1s and off for
1s)
The module is working with TX
channels disabled.
Steady green
The common public radio interface
(CPRI) link is working properly.
ALM
ACT
● CPRI0
● CPRI1
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Red
Green
Red or
green
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Silkscree
n
1 AAU5835f Hardware Description
Color
Status
Meaning
Steady red
The optical module fails to transmit or
receive signals (due to optical module
faults, broken optical fibers, or other
causes).
Blinking red
(on for 1s and
off for 1s)
The CPRI link is out of lock (due to a
clock lock failure between two modes,
CPRI port rate mismatch, or other
causes).
You are advised to check the system
configuration to locate the fault.
Steady off
The optical module cannot be detected
or is powered off.
1.2.5 AAU Angle Adjustment System
Massive MIMO AAUs adjust the tilt of antenna beams by modifying phase weights
of RF channels. For the passive antenna, the RET downtilt is changed through the
remote control unit (RCU).
Angle Adjustment Function
The active module is a 64T64R module. Each antenna column has four
independent RF channels. The antenna beam digital tilt can be adjusted by
changing the phase weights of the RF channels, thereby changing the beam
coverage.
Figure 1-7 shows the working principle of digital tilt adjustment for a massive
MIMO module.
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Figure 1-7 Working principle of digital tilt adjustment for a massive MIMO
module
The signal coverage of a passive antenna can be changed by adjusting the RET tilt
through the RCU. Figure 1-8 shows the working principle of the RET system.
Figure 1-8 Working principle of the RET system of a passive antenna
Angle Adjustment Configuration
The weights designed for typical coverage scenarios have been written into the
beam weight file, which is included in the eNodeB/gNodeB software package.
After the beam weight file is activated, the broadcast beamwidth is configured on
both the horizontal and vertical planes based on the setting of the Coverage
Scenario parameter, satisfying broadcast coverage demands in various application
scenarios.
Run the MOD NRDUCELLTRPBEAM (NR) or MOD BFANT (LTE) command.
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●
Set the Coverage Scenario parameter to adjust the antenna beam pattern.
●
Set the Tilt parameter to adjust the downtilt of the antenna beam.
●
The product software adjusts the antenna downtilt and other parameters
through digital weights, and digital weights can be adjusted by using the
Coverage Scenario and Tilt parameters.
NOTE
● For details on massive MIMO service coverage solutions and engineering guidelines, see
Beam Management Feature Parameter Description (NR) or Massive MIMO Feature
Parameter Description (LTE).
● For the RET control scheme of the passive antenna and engineering guidelines, see ALD
Management Feature Parameter Description.
● If the existing coverage scenarios do not meet the requirements, contact Huawei
technical support.
1.2.6 Optical Modules
An optical module transmits optical signals between an optical port and an optical
fiber.
Optical modules must be used in pairs on both ends of an optical fiber. The
following table describes the mapping.
NOTICE
An optical fiber must use the optical modules with the same specifications on
both ends. If optical modules with different specifications are used, performance
risks, such as alarms, bit errors, and interrupted links, may occur.
Table 1-5 Optical module mapping
Optical Module Type
Mapping Between the BBU Side and AAU Side
SFP duplex (two-fiber
bidirectional, or
duplex for short)
optical module
SFP duplex optical modules with the same
specifications
SFP BIDI (single-fiber
bidirectional, or BIDI
for short) optical
module
SFP BIDI optical modules are used on both sides.
● A mapping relationship exists between the TX
wavelength and RX wavelength. For example, if TX
and RX wavelengths of the optical module on the
BBU side are 1270TX/1330RX, those on the AAU side
are 1330TX/1270RX.
● Except for wavelengths, the specifications of optical
modules are the same.
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Optical Module Type
Mapping Between the BBU Side and AAU Side
The DSFP optical module is used on the BBU side and
the SFP BIDI optical module is used on the AAU side.
● A mapping relationship exists between the TX
wavelength and RX wavelength. For example, if TX
and RX wavelengths of the optical module on the
BBU side are 1270TX/1330RX, those on the AAU side
are 1330TX/1270RX.
● Except for wavelengths, the specifications of optical
modules are the same.
Optical modules can be classified as single-mode and multimode optical modules,
which can be distinguished as follows:
●
The puller of a single-mode optical module is blue and the puller of a
multimode optical module is black or gray.
●
The transmission mode is displayed as "SM" on the label of a single-mode
optical module and "MM" on the label of a multimode optical module.
NOTE
● The exteriors and labels of optical modules in this section are for reference only. The
actual exteriors and labels may be different.
● Optical modules to be installed must match the rates of their corresponding ports.
● Only Huawei-certified optical modules meeting the following requirements can be used
for Huawei wireless devices:
●
Environment, feature, and specifications requirements of devices on which optical
modules are to be installed
●
Laser safety requirements in IEC 60825-1
●
General safety requirements in IEC 60950-1
● The supported maximum remote distance varies with the optical module. For details,
see "CPRI Optical Fibers" in 3900 & 5900 Series Base Station Cables. CPRI optical fibers
are configured based on application scenarios.
SFP Optical Module
The following figure shows the exteriors of SFP optical modules.
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Figure 1-9 SFP optical modules
(1) SFP duplex (two-fiber bidirectional) optical (2) SFP BIDI (single-fiber bidirectional) optical
module
module
There is a label on each optical module that provides information such as the rate,
wavelength, and transmission mode, as shown in the following figure.
Figure 1-10 Label
(1) Rate
(2) Wavelength
(3) Transmission
distance
(4) Transmission mode
1.3 AAU Cables
This section describes the cables connected to an AAU.
1.3.1 AAU Cable List
AAU cables include a PGND cable, a power cable, and a CPRI optical fiber.
Table 1-6 lists AAU cables.
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Table 1-6 Cable list
Cable
One End
The Other End
Connector
Installation
Position
Connector
Installation
Position
1.3.2 AAU
PGND
Cable
OT terminal
(M6)
Ground
terminal on
the passive
antenna
OT terminal
(M8)
External ground
bar
1.3.3 AAU
Power
Cable
Outdoor quicklock power
connector
PWR port
Depending
on the
power
equipment
Power
equipment
1.3.4 CPRI
Optical
Fiber
DLC connector
CPRI0/CPRI1
port
DLC
connector
CPRI (SFP) port
on the BBU
1.3.2 AAU PGND Cable
This section describes the exterior and specifications of an AAU PGND cable.
An AAU PGND cable connects an AAU and a ground bar to properly ground the
AAU. Figure 1-11 shows its exterior.
Figure 1-11 Exterior of a PGND cable
(1) OT terminal (M6, 16 mm2 or 0.025
in.2)
(2) OT terminal (M8, 16 mm2 or 0.025
in.2)
NOTE
If the customer prepares a PGND cable, a copper-core cable with a minimum crosssectional area of 16 mm2 (0.025 in.2) is recommended.
1.3.3 AAU Power Cable
An AAU power cable is a –48 V DC shielded cable that feeds –48 V DC power into
an AAU.
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NOTE
● The maximum distance supported by an AAU power cable is 100 m (328.08 ft). Contact
Huawei engineers when an AAU power cable longer than 100 m (328.08 ft) is required.
● If a power device is provided by the customer, the recommended specification of the
circuit breaker on this power device is 40 A.
Exterior
The connector at one end of an AAU power cable is an outdoor quick-lock power
connector and the connector at the other end depends on the power device. The
two connectors must be prepared onsite. Figure 1-12 shows the exterior of an
AAU power cable.
Figure 1-12 AAU power cable
(1) Outdoor quick-lock power
connector
(2) –48 V DC power cable
Cable Description
The outer diameter of an AAU power cable ranges from 9.9 mm to 16.4 mm (0.39
in. to 0.65 in.). The following tables describe the AAU power cable.
Table 1-7 AAU power cable
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Cable
Type
Wire
Name
Wire Color in Most Regions
(European Standard/North
American Standard)
Wire Color in Other
Regions (UK)
AAU
power
cable
RTN(+)
Brown/Black
Blue
NEG(-)
Blue/Blue
Gray
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Table 1-8 AAU power supply solutions and power cable specifications
Power
Module
National
Standard
Remote
Distance
Wire
Specification
s
OCB
Quantity
● DCDU16D
(-48 V)
European
standards
0 m to 70 m
(0 ft to
229.66 ft)
10 mm2
(0.015 in.2)
0
71 m to 100
m (232.94 ft
to 328.08 ft)
16 mm2
(0.025 in.2)
0
0 m to 70 m
(0 ft to
229.66 ft)
10.5 mm2
(0.016 in.2)
0
71 m to 100
m (232.94 ft
to 328.08 ft)
16.7 mm2
(0.026 in.2)
1
0 m to 70 m
(0 ft to
229.66 ft)
6 mm2 (0.009
in.2)
0
71 m to 100
m (232.94 ft
to 328.08 ft)
10 mm2
(0.015 in.2)
0
0 m to 100 m
(0 ft to
328.08 ft)
8.2 mm2
(0.013 in.2)
0
● APM5930
(-48 V)
North
American
standards
OPM200 (-57
V)
European
standards
North
American
standards
NOTE
It is recommended that the AAU use the following power supply solutions:
● One DCDU16D with one group of power cables. For details about the input power
specifications of the DCDU16D, see section "DCDU16D" in 3900 & 5900 Series Base
Station Component Description.
● One APM5930 with one group of power cables. For details about the input power
specifications of the APM5930, see section "APM5930 Hardware Description" in 3900 &
5900 Series Base Station Cabinet Description.
● One OPM200 with one group of power cables. For details about the input power
specifications of the OPM200, see section "OPM200 User Guide" in Auxiliary Product
Description.
If the OCB is used, the wire specifications of the power cable between the DCDU16D and
the OCB range from 6 mm2 (0.009 in.2) to 10.5 mm2 (0.016 in.2). For details about the OCB,
see OCB-01M User Guide.
1.3.4 CPRI Optical Fiber
Optical fibers are used to transmit eCPRI signals and must be used with SFP
optical modules.
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Exterior
The CPRI optical fiber must be protected by an outdoor quick-lock optical fiber
connector. Figure 1-13 and Figure 1-14 show the exteriors of the connector and
the CPRI optical fiber, respectively.
Figure 1-13 Exterior of an outdoor quick-lock optical fiber connector
(1) CPRI optical fiber
(2) Outdoor quick-lock
optical fiber connector
(3) Lever
(4) Waterproof rubber
plug
(5) Nut
-
Figure 1-14 Exterior of a CPRI optical fiber
(1) DLC connector
(2) Breakout cable
(3) Label on the
breakout cable
Signal Description
Table 1-9 describes the labels on the DLC optical fiber. The connection positions in
the table are recommended.
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Table 1-9 Labels on the DLC optical fiber
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Label on the Breakout
Cable
Installation Position
1A
CPRI RX port on the AAU
1B
CPRI TX port on the AAU
2A
TX port on the BBU
2B
RX port on the BBU
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