1. BTS3812E and BTS3812A
V100R008
Product Description
Issue 04
Date 2007-06-30
Part Number 31400652
Huawei Technologies Proprietary

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Huawei Technologies Proprietary

3. BTS3812E and BTS3812A
Product Description Contents
Contents
About This Document.....................................................................................................................1
1 Introduction to the BTS3812E..................................................................................................1-1
1.1 Overview of the BTS3812E............................................................................................................................1-2
1.2 System Architecture of the BTS3812E...........................................................................................................1-3
1.3 Software Structure of the BTS3812E/BTS3812A..........................................................................................1-4
1.4 Logical Structure of the BTS3812E................................................................................................................1-5
2 Introduction to the BTS3812A.................................................................................................2-1
2.1 Overview of the BTS3812A............................................................................................................................2-2
2.2 Introduction to the BTS3812A........................................................................................................................2-3
2.3 Software Structure of the BTS3812E/BTS3812A..........................................................................................2-4
2.4 Logical Structure of the BTS3812A................................................................................................................2-6
3 Configuration Types of the BTS3812E/BTS3812A...............................................................3-1
4 Transport Subsystem of the BTS3812E/BTS3812A..............................................................4-1
4.1 Components of the BTS3812E/BTS3812A Transport Subsystem.................................................................4-2
4.2 Functions of the BTS3812E/BTS3812A Transport Subsystem......................................................................4-2
5 Baseband Subsystem of the BTS3812E/BTS3812A..............................................................5-1
5.1 Components of the BTS3812E/BTS3812A Baseband Subsystem.................................................................5-2
5.2 Functions of the BTS3812E/BTS3812A Baseband Subsystem......................................................................5-2
6 RF Subsystem of the BTS3812E/BTS3812A...........................................................................6-1
6.1 Components of the BTS3812E/BTS3812A RF Subsystem............................................................................6-2
6.2 Functions of the BTS3812E/BTS3812A RF Subsystem.................................................................................6-2
7 Control Subsystem of the BTS3812E/BTS3812A..................................................................7-1
7.1 Components of the BTS3812E/BTS3812A Control Subsystem.....................................................................7-2
7.2 Functions of the BTS3812E/BTS3812A Control Subsystem.........................................................................7-2
8 Power subsystem of the BTS3812E.........................................................................................8-1
8.1 Components of the BTS3812A Power Subsystem..........................................................................................8-2
8.2 Power distribution of the BTS3812E..............................................................................................................8-2
9 Power Subsystem of the BTS3812A........................................................................................9-1
9.1 Components of the BTS3812A Power Subsystem..........................................................................................9-2
9.2 Power Distribution of the BTS3812A.............................................................................................................9-2
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4. BTS3812E and BTS3812A
Contents Product Description
10 Environment Monitoring Subsystem of the BTS3812A.................................................10-1
10.1 Components of the Environment Monitoring Subsystem of the BTS3812A..............................................10-2
10.2 Functions of the BTS3812A Environment Monitoring Subsystem............................................................10-2
11 Antenna Subsystem of the NodeB......................................................................................11-1
11.1 Typical 3G Antenna System (Non-RET)....................................................................................................11-2
11.2 Typical Antenna System Shared Between 2G and 3G Systems (Non-RET) .............................................11-6
11.3 Typical 3G Antenna System (RET)............................................................................................................11-6
11.4 Typical Antenna System Shared Between 2G and 3G Systems (RET)......................................................11-6
12 Clock Synchronization Modes of the BTS3812E/BTS3812A..........................................12-1
12.1 Synchronization of the BTS3812E/BTS3812A with Iub Clock.................................................................12-2
12.2 Synchronization of the BTS3812E/BTS3812A with GPS Clock...............................................................12-2
12.3 Synchronization of the BTS3812E with the External Reference Clock.....................................................12-3
12.4 Free-Run Internal Clock of the BTS3812E/BTS3812A.............................................................................12-4
13 Signal Flow of the BTS3812E/BTS3812A...........................................................................13-1
13.1 Signal Flow of Downlink Services of the BTS3812E/BTS3812A.............................................................13-2
13.2 Signal Flow of Uplink Services of the BTS3812E/BTS3812A..................................................................13-4
13.3 Signal Flow of Signaling Processing of the BTS3812E/BTS3812A..........................................................13-6
14 Topologies of the BTS3812E/BTS3812A............................................................................14-1
14.1 Star Topology .............................................................................................................................................14-2
14.2 Chain Topology ..........................................................................................................................................14-2
14.3 Tree Topology ............................................................................................................................................14-3
14.4 Topology of the NodeB Cascaded with RRUs............................................................................................14-4
14.5 2G/3G Concurrent Transmission................................................................................................................14-4
14.6 Topology of the Hub NodeB.......................................................................................................................14-6
15 OM Subsystem of the NodeB..............................................................................................15-1
15.1 Components of the NodeB OM Subsystem................................................................................................15-2
15.2 Functions of the NodeB OM Subsystem.....................................................................................................15-3
16 Technical Specifications for the BTS3812E/BTS3812A...................................................16-1
16.1 Capacity Specifications for the BTS3812E/BTS3812A.............................................................................16-3
16.2 RF Specifications for the BTS3812E/BTS3812A.......................................................................................16-3
16.3 Engineering Specifications for the BTS3812E...........................................................................................16-4
16.4 Engineering Specifications for the BTS3812A...........................................................................................16-6
16.5 Surge Protection Specifications for Ports on the BTS3812E/BTS3812A...................................................16-8
16.6 Ports on the BTS3812E...............................................................................................................................16-9
16.7 Ports on the BTS3812A.............................................................................................................................16-11
16.8 Environmental Conditions of the BTS3812E............................................................................................16-13
16.8.1 Working Environment Requirements of the BTS3812E..................................................................16-13
16.8.2 Transportation Requirements of the BTS3812E..............................................................................16-15
16.8.3 Storage Requirements of the BTS3812E.........................................................................................16-17
16.9 Environmental Conditions of the BTS3812A...........................................................................................16-20
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5. BTS3812E and BTS3812A
Product Description Contents
16.9.1 Working Environment Requirements of the BTS3812A.................................................................16-20
16.9.2 Transportation Requirements of the BTS3812A..............................................................................16-22
16.9.3 Storage Requirements of the BTS3812A.........................................................................................16-25
16.10 Compliant Standards of the BTS3812E..................................................................................................16-27
16.11 Compliant Standards of the BTS3812A..................................................................................................16-29
Issue 04 (2007-06-30) Huawei Technologies Proprietary iii

7. BTS3812E and BTS3812A
Product Description Figures
Figures
Figure 1-1 BTS3812E in full configuration.........................................................................................................1-3
Figure 1-2 Software structure of the BTS3812E/BTS3812A..............................................................................1-4
Figure 1-3 Logical structure of the BTS3812E....................................................................................................1-6
Figure 2-1 Components of the BTS3812A system..............................................................................................2-3
Figure 2-2 Software structure of the BTS3812E/BTS3812A..............................................................................2-4
Figure 2-3 Logical structure of the BTS3812A....................................................................................................2-6
Figure 4-1 Iub interface boards in the baseband subrack.....................................................................................4-2
Figure 5-1 Position of the HULP, HDLP, and HBBI/HBOI in the baseband subrack........................................5-2
Figure 6-1 Components of the RF subsystem......................................................................................................6-2
Figure 6-2 Logical structure of the RF subsystem...............................................................................................6-3
Figure 7-1 Positions of the NMPT and NMON in the baseband subrack............................................................7-2
Figure 8-1 Components of the BTS3812E power subsystem..............................................................................8-2
Figure 8-2 Power distribution of the BTS3812E..................................................................................................8-3
Figure 9-1 Components of the BTS3812A power subsystem..............................................................................9-2
Figure 9-2 Power Distribution of the BTS3812A................................................................................................9-3
Figure 10-1 Components of the environment monitoring subsystem ...............................................................10-2
Figure 11-1 Single polarization antenna (without TMA) on the pole on the rooftop........................................11-3
Figure 11-2 Single polarization antenna (with TMA) on the tower platform....................................................11-5
Figure 12-1 Synchronization with Iub interface clock signals...........................................................................12-2
Figure 12-2 Synchronization with GPS clock signals........................................................................................12-3
Figure 12-3 Synchronization with external reference clock signals..................................................................12-3
Figure 12-4 Processing and distribution of the internal clock signals................................................................12-4
Figure 13-1 Signal flow of downlink services when the HDLP is not configured............................................13-2
Figure 13-2 Signal flow of downlink services when the HDLP is configured..................................................13-3
Figure 13-3 Signal Flow of Uplink Services When the HULP is Configured...................................................13-4
Figure 13-4 Signal Flow of Uplink Services When the HULP is Configured...................................................13-5
Figure 13-5 Signal flow of signaling processing of the NodeB.........................................................................13-6
Figure 14-1 Star topology ..................................................................................................................................14-2
Figure 14-2 Chain topology ..............................................................................................................................14-3
Figure 14-3 Tree topology .................................................................................................................................14-3
Figure 14-4 Topology of the BTS3812E/BTS3812A cascaded with RRUs......................................................14-4
Figure 14-5 2G/3G co-transmission in fractional ATM mode...........................................................................14-5
Figure 14-6 2G/3G co-transmission in CES mode.............................................................................................14-6
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8. BTS3812E and BTS3812A
Figures Product Description
Figure 14-7 Network topology of the hub NodeB.............................................................................................14-7
Figure 15-1 NodeB OM subsystem....................................................................................................................15-2
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9. BTS3812E and BTS3812A
Product Description Tables
Tables
Table 3-1 Configurations of the BTS3812E.........................................................................................................3-1
Table 3-2 Configurations of the BTS3812A........................................................................................................3-2
Table 16-1 Capacity of the baseband under 3 x 4 configuration........................................................................16-3
Table 16-2 Working frequency...........................................................................................................................16-3
Table 16-3 Receiver sensitivity (Band I: 2100 MHz)........................................................................................16-4
Table 16-4 Receiver sensitivity (Band II: 1900 MHz; band III: 1800 MHz; band V: 850 MHz; band VIII: 900
MHz)...................................................................................................................................................................16-4
Table 16-5 Physical dimensions of the BTS3812E............................................................................................16-4
Table 16-6 Equipment Weight...........................................................................................................................16-5
Table 16-7 Parameters of the power supply.......................................................................................................16-5
Table 16-8 Power consumptions........................................................................................................................16-6
Table 16-9 Reliability of the BTS3812E............................................................................................................16-6
Table 16-10 Physical dimensions of the BTS3812A..........................................................................................16-7
Table 16-11 Equipment Weight.........................................................................................................................16-7
Table 16-12 Parameters of the power supply.....................................................................................................16-7
Table 16-13 Power consumptions......................................................................................................................16-8
Table 16-14 Reliability of the BTS3812A.........................................................................................................16-8
Table 16-15 Surge protection specifications for the BTS3812E/BTS3812A.....................................................16-9
Table 16-16 Transmission ports of the BTS3812E............................................................................................16-9
Table 16-17 Cascading ports connecting to the 2G equipment........................................................................16-10
Table 16-18 Specifications for the external alarm ports...................................................................................16-10
Table 16-19 Other external ports of the BTS3812E.........................................................................................16-10
Table 16-20 Transmission ports of the BTS3812A..........................................................................................16-11
Table 16-21 Cascading ports connecting to the 2G equipment........................................................................16-12
Table 16-22 Specifications for the external alarm ports...................................................................................16-12
Table 16-23 Other external ports of the BTS3812A........................................................................................16-12
Table 16-24 Climatic requirements..................................................................................................................16-13
Table 16-25 Requirements for physically active materials..............................................................................16-14
Table 16-26 Requirements for chemically active materials.............................................................................16-14
Table 16-27 Mechanical stress requirements...................................................................................................16-14
Table 16-28 Climatic requirements..................................................................................................................16-15
Table 16-29 Requirements for physically active materials..............................................................................16-16
Table 16-30 Requirements for chemically active materials.............................................................................16-16
Table 16-31 Mechanical stress requirements...................................................................................................16-17
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10. BTS3812E and BTS3812A
Tables Product Description
Table 16-32 Climatic requirements..................................................................................................................16-17
Table 16-33 Requirements for physically active materials..............................................................................16-18
Table 16-34 Requirements for chemically active materials.............................................................................16-19
Table 16-35 Mechanical stress requirements...................................................................................................16-19
Table 16-36 Climatic requirements..................................................................................................................16-20
Table 16-37 Requirements for chemically active materials.............................................................................16-21
Table 16-38 Mechanical stress requirements...................................................................................................16-22
Table 16-39 Climatic requirements..................................................................................................................16-22
Table 16-40 Requirements for physically active materials..............................................................................16-23
Table 16-41 Requirements for chemically active materials.............................................................................16-23
Table 16-42 Mechanical stress requirements...................................................................................................16-24
Table 16-43 Climatic requirements..................................................................................................................16-25
Table 16-44 Requirements for physically active materials..............................................................................16-26
Table 16-45 Requirements for chemically active materials.............................................................................16-26
Table 16-46 Mechanical stress requirements...................................................................................................16-27
viii Huawei Technologies Proprietary Issue 04 (2007-06-30)

11. BTS3812E and BTS3812A
Product Description About This Document
About This Document
Purpose
This document describes the software and hardware structure, subsystems, configuration type,
signal flow, clock synchronization, topology of the BTS3812E and BTS3812A. This document
also lists the specifications for the capacity, RF, engineering, surge protection, and physical
ports.
Related Versions
Product Name Version
BTS3812E V100R008
BTS3812A V100R008
Intended Audience
This document is intended for:
l Network planners
l Field engineers
l System engineers
Update History
Refer to Changes in BTS3812E and BTS3812A Product Description.
Organization
1 Introduction to the BTS3812E
The BTS3812E is an indoor macro NodeB developed by Huawei. It complies with the protocols
of 3GPP R99/R4/R5/R6 FDD.
2 Introduction to the BTS3812A
The BTS3812A that is developed by Huawei is an outdoor macro NodeB. It complies with the
protocols of 3GPP R99/R4/R5/R6 FDD.
3 Configuration Types of the BTS3812E/BTS3812A
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12. BTS3812E and BTS3812A
About This Document Product Description
A single BTS3812E/BTS3812A can support up to 12 cells. The configuration type is flexible
and multiple and the maximum configuration is 6 x 2 or 3 x 4.
4 Transport Subsystem of the BTS3812E/BTS3812A
The transport subsystem consists of the NDTI and the NUTI. It interfaces with the RNC for
message exchange between the NodeB and the RNC.
5 Baseband Subsystem of the BTS3812E/BTS3812A
The baseband subsystem, processing baseband signals, consists of the HULP, HDLP, and HBOI/
HBBI.
6 RF Subsystem of the BTS3812E/BTS3812A
The RF subsystem consists of MAFUs and MTRUs and processes the RF signals.
7 Control Subsystem of the BTS3812E/BTS3812A
The control subsystem consists of the NMPT and the NMON. The control subsystem controls
and manages the entire NodeB system.
8 Power subsystem of the BTS3812E
The power subsystem of the BTS3812E is composed of the power subrack at the cabinet bottom
and the power distribution subsystem inside the cabinet. The BTS3812E uses –48 V DC, +24
V DC, or 220 V AC power supply.
9 Power Subsystem of the BTS3812A
The BTS3812A power subsystem is composed of the surge protection filter subrack, power
subrack, AC power distribution subrack, batteries, busbar, and load.
10 Environment Monitoring Subsystem of the BTS3812A
The unmanned BTS3812A is distributed in a vast area. Therefore, it must be effectively
monitored to ensure stable operation. The BTS3812A environment monitoring subsystem
provides customized solutions regarding door control, infrared, smoke, water immersion,
humidity, and temperature monitoring.
11 Antenna Subsystem of the NodeB
The NodeB antenna subsystem transmits the RF signals between the antenna ports of the NodeB
cabinet and the antenna. The antenna subsystem also transmits signals to and receives signals
from the UE. The antenna system is classified into the non-RET antenna subsystem and RET
antenna subsystem.
12 Clock Synchronization Modes of the BTS3812E/BTS3812A
The BTS3812E/BTS3812A supports multiple clock synchronization modes. The clock module
inside the NMPT achieves clock synchronization of the BTS3812E/BTS3812A. The module
provides timing signals for the entire NodeB.
13 Signal Flow of the BTS3812E/BTS3812A
Signal flow of the BTS3812E and BTS3812A is of signal flow of downlink services, signal flow
of uplink services, and signal flow of signaling processing.
14 Topologies of the BTS3812E/BTS3812A
Topology of the BTS3812E/BTS3812A refers to the transmission topology over the Iub
interface, that is, the topology of the transmission channels between the NodeB and the RNC.
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13. BTS3812E and BTS3812A
Product Description About This Document
The BTS3812E/BTS3812A supports multiple topologies, such as star, chain, tree, cascading
RRUs, hub NodeB, and co-transmission with 2G equipment, to meet the requirements of
different scenarios.
15 OM Subsystem of the NodeB
The NodeB OM subsystem manages, monitors, and maintains the software, hardware, and
configuration of the NodeB. The NodeB OM subsystem provides various OM modes and
multiple maintenance platforms to meet different maintenance requirements.
16 Technical Specifications for the BTS3812E/BTS3812A
The technical specifications for the BTS3812E/BTS3812A cover items of the capacity, RF,
engineering, surge protection, ports, environment, and compliant standards.
Conventions
1. Symbol Conventions
The following symbols may be found in this document. They are defined as follows
Symbol Description
Indicates a hazard with a high level of risk that, if not avoided,
will result in death or serious injury.
DANGER
Indicates a hazard with a medium or low level of risk which, if
not avoided, could result in minor or moderate injury.
WARNING
Indicates a potentially hazardous situation that, if not avoided,
could cause equipment damage, data loss, and performance
CAUTION degradation, or unexpected results.
TIP Indicates a tip that may help you solve a problem or save your
time.
NOTE Provides additional information to emphasize or supplement
important points of the main text.
2. General Conventions
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 Terminal display is in Courier New.
3. Command Conventions
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14. BTS3812E and BTS3812A
About This Document Product Description
Convention Description
Boldface The keywords of a command line are in boldface.
Italic Command arguments are in italic.
[] Items (keywords or arguments) in square brackets [ ] are optional.
{x | y | ...} Alternative items are grouped in braces and separated by vertical
bars.One is selected.
[ x | y | ... ] Optional alternative items are grouped in square brackets and
separated by vertical bars.One or none is selected.
{ x | y | ... } * Alternative items are grouped in braces and separated by vertical
bars.A minimum of one or a maximum of all can be selected.
[ x | y | ... ] * Alternative items are grouped in braces and separated by vertical
bars.A minimum of zero or a maximum of all can be selected.
4. GUI Conventions
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 .
5. Keyboard Operation
Convention Description
Key Press the key.For example,press Enter and press Tab.
Key1+Key2 Press the keys concurrently.For example,pressing Ctrl+Alt+A
means the three keys should be pressed concurrently.
Key1,Key2 Press the keys in turn.For example,pressing Alt,A means the two
keys should be pressed in turn.
6. Mouse Operation
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.
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15. BTS3812E and BTS3812A
Product Description About This Document
Action Description
Drag Press and hold the primary mouse button and move the pointer
to a certain position.
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17. BTS3812E and BTS3812A
Product Description 1 Introduction to the BTS3812E
1 Introduction to the BTS3812E
About This Chapter
The BTS3812E is an indoor macro NodeB developed by Huawei. It complies with the protocols
of 3GPP R99/R4/R5/R6 FDD.
1.1 Overview of the BTS3812E
The BTS3812E is an indoor macro NodeB. The BTS3812E is used in urban areas, business
centers, and large-sized and medium-sized cities with very high potential for traffic growth.
1.2 System Architecture of the BTS3812E
The BTS3812E system consists of the BTS3812E cabinet, antenna system, and LMT computer.
1.3 Software Structure of the BTS3812E/BTS3812A
The BTS3812E/BTS3812A software consists of the platform software, signaling protocol
software, operation and maintenance software (OM software), and data center.
1.4 Logical Structure of the BTS3812E
The BTS3812E is composed of the modules of the transport subsystem, baseband subsystem,
RF subsystem, control subsystem, antenna subsystem, OM subsystem, and power subsystem.
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18. BTS3812E and BTS3812A
1 Introduction to the BTS3812E Product Description
1.1 Overview of the BTS3812E
The BTS3812E is an indoor macro NodeB. The BTS3812E is used in urban areas, business
centers, and large-sized and medium-sized cities with very high potential for traffic growth.
The BTS3812E has the following benefits:
l Capacity: One BTS3812E supports up to 1024 and 1536 Channel Elements (CEs) in the
uplink (UL) and the downlink (DL) respectively. One BTS3812E also supports up to 12
cells and 6 sectors. Each sector supports up to 4 carriers.
l Coverage: It supports particular configurations such as sectors x carriers and sectors x
transmit power. The maximum search radius is 180 km. The 1-way receiver sensitivity is
higher than –125 dBm. The BTS3812E supports transmit diversity and can be connected
to the Remote Radio Unit (RRU).
l Multiband applications: It supports frequency bands 2100 MHz, 1900 MHz, 1800 MHz,
900 MHz, and 850 MHz and supports cabinet sharing between any two bands to meet
operators' requirements in different regions.
l Flexible networking topology: It supports multiple topologies such as star, chain, tree, and
ring. It also supports satellite and microwave transmission.
l Transmission interfaces: The data on the Iub interface can be transmitted in the channelized
and non-channelized ATM transmission based on E1/T1 and STM-1/OC-3 and in the IP
transmission based on E1/T1 and FE. The BTS3812A supports the UNI link, IMA link,
fractional ATM link, and hub NodeB.
l Clock and synchronization: The NodeB supports the clock extracted from the Iub interface,
the Global Positioning System (GPS) clock, BITS clock, and internal clock.
l High Speed Downlink Packet Access (HSDPA): HSDPA and R99/R4 services are
supported by the same carrier. The downlink peak rate is up to 14.4 Mbit/s and the uplink
peak rate is up to 384 kbit/s. Each cell supports 64 HSDPA users.
l High Speed Uplink Packet Access (HSUPA): HSUPA phase 1 is supported. The uplink
application layer peak rate is up to 1.44 Mbit/s (DL) and peak rate over the Uu interface is
1.92 Mbit/s. Each cell supports 20 HSUPA users.
l Multimedia Broadcast and Multicast Service (MBMS): With this technology, the NodeB
can save resources on the Uu interface either by sending multimedia broadcast services to
the UEs in a cell over common channels or by sending multicast services subscribed by the
UEs in the cell.
l Installation: With a modular design that supports cabling at the front of the cabinet, the
NodeB cabinet is easy to install and maintain.
l OM platform: With the Local Maintenance Terminal (LMT) and the M2000, the NodeB
supports the local maintenance, remote maintenance, and inverse maintenance.
l Enhanced antenna system: The antenna system supports Antenna Interface Standards
Group (AISG) protocols, Tower Mounted Amplifier (TMA) and Smart Tower Mounted
Amplifier (STMA), and Remote Electrical Tilt (RET).
l High-speed access of UEs: The NodeB allows UEs to enjoy services in a vehicle moving
at the speed of up to 400 km/h.
l IP RAN: The IP transmission mode enables all-IP transmission on the Iub and Iur interface.
Data services can be transmitted over low rate links. This helps you make use of the IP
transmission resources.
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19. BTS3812E and BTS3812A
Product Description 1 Introduction to the BTS3812E
1.2 System Architecture of the BTS3812E
The BTS3812E system consists of the BTS3812E cabinet, antenna system, and LMT computer.
Figure 1-1 shows the components of the BTS3812E system.
Figure 1-1 BTS3812E in full configuration
Components Description
BTS3812E cabinet For details about the hardware structure of the BTS3812E, refer to
BTS3812E Cabinet.
For details about the logical structure of the BTS3812E, refer to 1.4
Logical Structure of the BTS3812E.
Antenna system The antenna system can be categorized into the RET antenna system
and the non-RET antenna system. It receives weak signals in the
uplink and transmits signals in the downlink.
For details about the antenna system, refer to 11 Antenna
Subsystem of the NodeB.
For details about the installation of the antenna devices, refer to
NodeB Antenna System Installation Guide (Non-RET) and
NodeB Antenna System Installation Guide (RET).
GPS antenna system The GPS antenna system provides GPS clock signals for the NodeB.
For details about the installation of the GPS antenna devices, refer
to NodeB GPS Antenna System Installation Guide.
LMT The LMT computer is the computer that is installed with the LMT
software package and is connected to the OM network of the NEs.
You may operate and maintain the NE through the LMT.
For details, refer to NodeB LMT User Guide.
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20. BTS3812E and BTS3812A
1 Introduction to the BTS3812E Product Description
Components Description
Environment This is an optional device. The environment monitoring device
monitoring device configured for the BTS3812E is the Environment Monitoring Unit
(EMU). For details about the EMU, refer to the EMU User Guide.
1.3 Software Structure of the BTS3812E/BTS3812A
The BTS3812E/BTS3812A software consists of the platform software, signaling protocol
software, operation and maintenance software (OM software), and data center.
Structure of the NodeB Software
Figure 1-2 Software structure of the BTS3812E/BTS3812A
Platform Software
The platform software serves as the support for the signaling protocol software, OM software,
and data center. It runs on the boards in the baseband subrack. The boards can be an NMPT, an
NDTI, an NAOI, a HULP, a HDLP, an NBBI, and an NMON. The platform software provides
following functions:
l Timing management
l Task management
l Memory management
l Module management
l Management of the loading and running of the application software
l Providing of a message transfer mechanism for communications between the modules and
the application software
l Tracing of inter-board messages for troubleshooting
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21. BTS3812E and BTS3812A
Product Description 1 Introduction to the BTS3812E
Data Center
The data center stores the configuration data of each module in .xml format.
Signaling Protocol Software
The signaling protocol software runs on all the boards of the NodeB except the MAFU and
NMON. Signaling protocols comprise the radio network layer protocol and transport network
layer protocol.
l The radio network layer protocol has the following functions:
– Signaling data configuration
– NBAP signaling processing
– RRC protocol processing over BCH
– Processing of the outer loop power control frame and radio parameter update frame in
the FP
– Mapping and management of NodeB internal physical resources and logical resources
l The transport network layer protocol has the following functions:
– Transport data configuration
– ALCAP protocol processing
– SAAL protocol processing
OM Software
The OM software runs on every board of the NodeB. It works with the LMT and M2000 for
NodeB maintenance.
l Equipment Management
l Data configuration
l Performance management
l Commissioning management
l Alarm Management
l Software Management
l Tracing management
l Right Management
l Backup management
l Log management
1.4 Logical Structure of the BTS3812E
The BTS3812E is composed of the modules of the transport subsystem, baseband subsystem,
RF subsystem, control subsystem, antenna subsystem, OM subsystem, and power subsystem.
Logical structure of the BTS3812E
Figure 1-3 shows the logical structure of the BTS3812E.
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22. BTS3812E and BTS3812A
1 Introduction to the BTS3812E Product Description
Figure 1-3 Logical structure of the BTS3812E
Transport subsystem RF subsystem RX channel
Duplexer Control subsystem TX channel
TMA Baseband subsystem PA
RNC Power subsystem
For details about the subsystems of the BTS3812E, refer to the following:
l 4 Transport Subsystem of the BTS3812E/BTS3812A
l 5 Baseband Subsystem of the BTS3812E/BTS3812A
l 6 RF Subsystem of the BTS3812E/BTS3812A
l 7 Control Subsystem of the BTS3812E/BTS3812A
l 11 Antenna Subsystem of the NodeB
l 15 OM Subsystem of the NodeB
l 12.3 Synchronization of the BTS3812E with the External Reference Clock
l 8 Power subsystem of the BTS3812E
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23. BTS3812E and BTS3812A
Product Description 2 Introduction to the BTS3812A
2 Introduction to the BTS3812A
About This Chapter
The BTS3812A that is developed by Huawei is an outdoor macro NodeB. It complies with the
protocols of 3GPP R99/R4/R5/R6 FDD.
2.1 Overview of the BTS3812A
The BTS3812E is an outdoor macro NodeB. The BTS3812E is used in urban areas, business
centers, and large-sized and medium-sized cities with very high potential for traffic growth.
2.2 Introduction to the BTS3812A
The BTS3812A system consists of the BTS3812A cabinet, antenna system, and LMT computer.
2.3 Software Structure of the BTS3812E/BTS3812A
The BTS3812E/BTS3812A software consists of the platform software, signaling protocol
software, operation and maintenance software (OM software), and data center.
2.4 Logical Structure of the BTS3812A
The BTS3812A is composed of the modules of the transport subsystem, baseband subsystem,
RF subsystem, control subsystem, antenna subsystem, and OM subsystem, power subsystem,
and environment monitoring subsystem.
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24. BTS3812E and BTS3812A
2 Introduction to the BTS3812A Product Description
2.1 Overview of the BTS3812A
The BTS3812E is an outdoor macro NodeB. The BTS3812E is used in urban areas, business
centers, and large-sized and medium-sized cities with very high potential for traffic growth.
The BTS3812A has the following benefits:
l Capacity: One BTS3812A supports up to 1024 and 1536 Channel Elements (CEs) in the
uplink (UL) and the downlink (DL) respectively. One BTS3812A also supports up to 12
cells and 6 sectors. Each sector supports up to 4 carriers.
l Coverage: It supports particular configurations such as sectors x carriers and sectors x
transmit power. The maximum search radius is 180 km. The 1-way receiver sensitivity is
higher than –125 dBm. The BTS3812E supports transmit diversity and can be connected
to the Remote Radio Unit (RRU).
l Multiband applications: It supports frequency bands 2100 MHz, 1900 MHz, 1800 MHz,
900 MHz, and 850 MHz and supports cabinet sharing between any two bands to meet
operators' requirements in different regions.
l Flexible networking topology: It supports multiple topologies such as star, chain, tree, and
ring. It also supports satellite and microwave transmission.
l Transmission interfaces: The data on the Iub interface can be transmitted in the channelized
and non-channelized ATM transmission based on E1/T1 and STM-1/OC-3 and in the IP
transmission based on E1/T1 and FE. The BTS3812A supports the UNI link, IMA link,
fractional ATM link, and hub NodeB.
l Clock and synchronization: The NodeB supports the clock extracted from the Iub interface,
the Global Positioning System (GPS) clock, BITS clock, and internal clock.
l High Speed Downlink Packet Access (HSDPA): HSDPA and R99/R4 services are
supported by the same carrier. The downlink peak rate is up to 14.4 Mbit/s and the uplink
peak rate is up to 384 kbit/s. Each cell supports 64 HSDPA users.
l High Speed Uplink Packet Access (HSUPA): HSUPA phase 1 is supported. The uplink
application layer peak rate is up to 1.44 Mbit/s (DL) and peak rate over the Uu interface is
1.92 Mbit/s. Each cell supports 20 HSUPA users.
l Multimedia Broadcast and Multicast Service (MBMS): With this technology, the NodeB
can save resources on the Uu interface either by sending multimedia broadcast services to
the UEs in a cell over common channels or by sending multicast services subscribed by the
UEs in the cell.
l Installation: With a modular design that supports cabling at the front of the cabinet, the
NodeB cabinet is easy to install and maintain.
l OM platform: With the Local Maintenance Terminal (LMT) and the M2000, the NodeB
supports the local maintenance, remote maintenance, and inverse maintenance.
l Enhanced antenna system: The antenna system supports Antenna Interface Standards
Group (AISG) protocols, Tower Mounted Amplifier (TMA) and Smart Tower Mounted
Amplifier (STMA), and Remote Electrical Tilt (RET).
l High-speed access of UEs: The NodeB allows UEs to enjoy services in a vehicle moving
at the speed of up to 400 km/h.
l IP RAN: The IP transmission mode enables all-IP transmission on the Iub and Iur interface.
Data services can be transmitted over low rate links. This helps you make use of the IP
transmission resources.
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25. BTS3812E and BTS3812A
Product Description 2 Introduction to the BTS3812A
l The cabinet is designed in accordance with international standards and is configured with
an environment monitoring and adjustment system. This enables the cabinet to be adapted
to various environment.
2.2 Introduction to the BTS3812A
The BTS3812A system consists of the BTS3812A cabinet, antenna system, and LMT computer.
Figure 2-1 shows the components of the BTS3812A system.
Figure 2-1 Components of the BTS3812A system
Component Description
BTS3812A cabinet For details about the hardware structure of the BTS3812A, refer to
BTS3812A Cabinet.
For details about the logical structure of the BTS3812A, refer to 2.4
Logical Structure of the BTS3812A.
Antenna system The antenna system can be categorized into the RET antenna system
and the non-RET antenna system. It receives weak signals in the
uplink and transmits signals in the downlink.
For details about the antenna system, refer to 11 Antenna
Subsystem of the NodeB.
For details about the installation of the antenna devices, refer to
NodeB Antenna System Installation Guide (Non-RET) and
NodeB Antenna System Installation Guide (RET).
GPS antenna system The GPS antenna system provides GPS clock signals for the NodeB.
For details about the installation of the GPS antenna devices, refer
to NodeB GPS Antenna System Installation Guide.
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26. BTS3812E and BTS3812A
2 Introduction to the BTS3812A Product Description
Component Description
LMT The LMT computer is the computer that is installed with the LMT
software package and is connected to the OM network of the NEs.
You may operate and maintain the NE through the LMT.
For details, refer to NodeB LMT User Guide.
Battery cabinet The batter cabinet is optional. The user guide is delivered with the
battery cabinet.
Environment The environment monitoring device is optional. The user guide is
monitoring device delivered with the device.
2.3 Software Structure of the BTS3812E/BTS3812A
The BTS3812E/BTS3812A software consists of the platform software, signaling protocol
software, operation and maintenance software (OM software), and data center.
Structure of the NodeB Software
Figure 2-2 Software structure of the BTS3812E/BTS3812A
Platform Software
The platform software serves as the support for the signaling protocol software, OM software,
and data center. It runs on the boards in the baseband subrack. The boards can be an NMPT, an
NDTI, an NAOI, a HULP, a HDLP, an NBBI, and an NMON. The platform software provides
following functions:
l Timing management
l Task management
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27. BTS3812E and BTS3812A
Product Description 2 Introduction to the BTS3812A
l Memory management
l Module management
l Management of the loading and running of the application software
l Providing of a message transfer mechanism for communications between the modules and
the application software
l Tracing of inter-board messages for troubleshooting
Data Center
The data center stores the configuration data of each module in .xml format.
Signaling Protocol Software
The signaling protocol software runs on all the boards of the NodeB except the MAFU and
NMON. Signaling protocols comprise the radio network layer protocol and transport network
layer protocol.
l The radio network layer protocol has the following functions:
– Signaling data configuration
– NBAP signaling processing
– RRC protocol processing over BCH
– Processing of the outer loop power control frame and radio parameter update frame in
the FP
– Mapping and management of NodeB internal physical resources and logical resources
l The transport network layer protocol has the following functions:
– Transport data configuration
– ALCAP protocol processing
– SAAL protocol processing
OM Software
The OM software runs on every board of the NodeB. It works with the LMT and M2000 for
NodeB maintenance.
l Equipment Management
l Data configuration
l Performance management
l Commissioning management
l Alarm Management
l Software Management
l Tracing management
l Right Management
l Backup management
l Log management
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28. BTS3812E and BTS3812A
2 Introduction to the BTS3812A Product Description
2.4 Logical Structure of the BTS3812A
The BTS3812A is composed of the modules of the transport subsystem, baseband subsystem,
RF subsystem, control subsystem, antenna subsystem, and OM subsystem, power subsystem,
and environment monitoring subsystem.
Logical structure of the BTS3812A
Figure 2-3 shows the logical structure of the BTS3812A.
Figure 2-3 Logical structure of the BTS3812A
Transport subsystem RF subsystem RX channel
Control subsystem Baseband subsystem TX channel
Power subsystem Environment monitoring subsystem PA
TMA Duplexer AC power input
RNC GPS
For details about the subsystems of the BTS3812A, refer to:
l 4 Transport Subsystem of the BTS3812E/BTS3812A
l 5 Baseband Subsystem of the BTS3812E/BTS3812A
l 6 RF Subsystem of the BTS3812E/BTS3812A
l 7 Control Subsystem of the BTS3812E/BTS3812A
l 11 Antenna Subsystem of the NodeB
l 15 OM Subsystem of the NodeB
l 9 Power Subsystem of the BTS3812A
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Product Description 2 Introduction to the BTS3812A
l 10 Environment Monitoring Subsystem of the BTS3812A
l 12.3 Synchronization of the BTS3812E with the External Reference Clock
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31. BTS3812E and BTS3812A
Product Description 3 Configuration Types of the BTS3812E/BTS3812A
3 Configuration Types of the BTS3812E/
BTS3812A
A single BTS3812E/BTS3812A can support up to 12 cells. The configuration type is flexible
and multiple and the maximum configuration is 6 x 2 or 3 x 4.
Configurations of the BTS3812E
Table 3-1 lists the configurations of a single BTS3812E.
Table 3-1 Configurations of the BTS3812E
Configuration Transmit diversity
1×1 Optional
3×1 Optional
3×2 Optional
3×3 –
3×4 –
6×1 –
6×2 –
NOTE
N x M = sector x carrier, for example, 3 x 1 indicates 3 sectors x 1 carrier.
The BTS3812E has the following configuration features:
l The NodeB supports the configuration of 1 to 6 sectors. Each sector supports up to four
carriers. It can be connected to RRUs.
l A single NodeB can support up to 3 x 4 or 6 x 2 configuration in no transmit diversity mode.
You may select one of the configurations, depending on the locations and the number of
UEs.
l The NodeB supports smooth capacity expansion from 1 x 1 to 6 x 2 or 3 x 4.
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32. BTS3812E and BTS3812A
3 Configuration Types of the BTS3812E/BTS3812A Product Description
l The capacity of the modular BTS3812E can be expanded simply through additional
modules or license upgrade. In the initial phase of network deployment, you can use some
small capacity configurations such as omni configuration and 3 x 1. With the increase in
the number of UEs, you can smoothly upgrade the system to large-capacity configurations
such as 3 x 2 and 3 x 4.
Configurations of the BTS3812A
Table 3-2 lists the configurations of a single BTS3812A.
Table 3-2 Configurations of the BTS3812A
Configuration Transmit diversity
1×1 Optional
3×1 Optional
3×2 Optional
3×3 –
3×4 –
6×1 –
6×2 –
NOTE
N x M = sector x carrier, for example, 3 x 1 indicates 3 sectors x 1 carrier.
The BTS3812A has the following configuration features:
l The NodeB supports the configuration of 1 to 6 sectors. Each sector supports up to four
carriers. It can be connected to RRUs.
l A single NodeB can support up to 3 x 4 or 6 x 2 configuration in no transmit diversity mode.
You may select one of the configurations, depending on the locations and the number of
UEs.
l The NodeB supports smooth capacity expansion from 1 x 1 to 6 x 2 or 3 x 4.
l The capacity of the modular BTS3812A can be expanded simply through additional
modules or license upgrade. In the initial phase of network deployment, you can use some
small capacity configurations such as omni configuration and 3 x 1. With the increase in
the number of UEs, you can smoothly upgrade the system to large-capacity configurations
such as 3 x 2 and 3 x 4.
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33. BTS3812E and BTS3812A
Product Description 4 Transport Subsystem of the BTS3812E/BTS3812A
4 Transport Subsystem of the BTS3812E/
BTS3812A
About This Chapter
The transport subsystem consists of the NDTI and the NUTI. It interfaces with the RNC for
message exchange between the NodeB and the RNC.
4.1 Components of the BTS3812E/BTS3812A Transport Subsystem
The transport subsystem consists of the NDTI and the NUTI.
4.2 Functions of the BTS3812E/BTS3812A Transport Subsystem
The transport subsystem provides the interface between the NodeB and the RNC. The transport
subsystem is connected to the baseband subsystem and control subsystem through internal buses.
The transport subsystem performs NBAP preprocessing and transmits interactive information
between the NodeB and the RNC. The transport subsystem also provides multiple transmission
ports and supports various networking topologies to meet different transmission requirements.
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34. BTS3812E and BTS3812A
4 Transport Subsystem of the BTS3812E/BTS3812A Product Description
4.1 Components of the BTS3812E/BTS3812A Transport
Subsystem
The transport subsystem consists of the NDTI and the NUTI.
The number of the slot that hosts the NUTIs and NDTIs can be 12, 13, 14, or 15, as shown in
Figure 4-1.
Figure 4-1 Iub interface boards in the baseband subrack
The BTS3812E/BTS3812A can configure up to four Iub interface boards. Slots 12 and 13 in the
baseband subrack support both the NUTI and NDTI. Slots 14 and 15 support only the NUTI
mounted with a subrack for cabling from the front.
4.2 Functions of the BTS3812E/BTS3812A Transport
Subsystem
The transport subsystem provides the interface between the NodeB and the RNC. The transport
subsystem is connected to the baseband subsystem and control subsystem through internal buses.
The transport subsystem performs NBAP preprocessing and transmits interactive information
between the NodeB and the RNC. The transport subsystem also provides multiple transmission
ports and supports various networking topologies to meet different transmission requirements.
The transport subsystem provides the following functions:
l Interfacing the NodeB with the RNC
l Interfacing with the baseband subsystem and control subsystem through internal ATM
buses, performing NBAP preprocessing, and transmitting interactive information between
the NodeB and the RNC
Iub interface boards provide multiple transmission ports and networking topologies to meet the
actual transport network and interface requirements of network operators.
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35. BTS3812E and BTS3812A
Product Description 5 Baseband Subsystem of the BTS3812E/BTS3812A
5 Baseband Subsystem of the BTS3812E/
BTS3812A
About This Chapter
The baseband subsystem, processing baseband signals, consists of the HULP, HDLP, and HBOI/
HBBI.
5.1 Components of the BTS3812E/BTS3812A Baseband Subsystem
The baseband subsystem consists of the HULP, HDLP, and HBOI/HBBI.
5.2 Functions of the BTS3812E/BTS3812A Baseband Subsystem
The baseband subsystem provides the functions of downlink processing, uplink processing, and
closed loop processing.
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36. BTS3812E and BTS3812A
5 Baseband Subsystem of the BTS3812E/BTS3812A Product Description
5.1 Components of the BTS3812E/BTS3812A Baseband
Subsystem
The baseband subsystem consists of the HULP, HDLP, and HBOI/HBBI.
Figure 5-1 shows the position of the HULP, HDLP, and HBBI/HBOI in the baseband subrack.
Figure 5-1 Position of the HULP, HDLP, and HBBI/HBOI in the baseband subrack
NOTE
The HBOI has the same function as that of the HBBI. The HBOI is used only when the RRU is connected.
The baseband boards are described as follows:
l The uplink signal processing parts of the HULP and HBBI form the resource pool to process
the uplink baseband signals.
l The downlink signal processing parts of the HDLP and HBBI form the resource pool to
process the downlink baseband signals.
l If the NodeB supports more than six cells, the uplink baseband signal processing resource
pool is split into several resource groups. Each resource group may deal with data in six
cells at most. Each cell belongs to one uplink resource group at a time. The cells in the
same resource group share their uplink resources. The softer handover can be achieved
between the cells.
5.2 Functions of the BTS3812E/BTS3812A Baseband
Subsystem
The baseband subsystem provides the functions of downlink processing, uplink processing, and
closed loop processing.
l Downlink processing
The baseband subsystem receives FP packets from the transport subsystem. After channel
coding and downlink modulation, it transmits the data to the HBBI or HBOI. The HBBI
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37. BTS3812E and BTS3812A
Product Description 5 Baseband Subsystem of the BTS3812E/BTS3812A
then allocates the DL data to the MTRU, or the HBOI then allocates the DL data to the
RRU.
l Uplink processing
The HBBI receives the UL baseband data from the MTRU or the HBOI receives the UL
baseband data from the RRU. After demodulation and decoding, it sends the data in the
format of FP packets to the transport subsystem.
l Closed loop processing:
The baseband subsystem implements the physical layer closed loop processing for
acquisition indications (AIs), the uplink and downlink power control, and the DL closed
loop transmit diversity processing. The processing retrieves related control information,
such as AI, uplink transmit power control (TPC), downlink TPC and feedback information
(FBI), from the received UL data and then sends the control information to DL transmit
channels.
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39. BTS3812E and BTS3812A
Product Description 6 RF Subsystem of the BTS3812E/BTS3812A
6 RF Subsystem of the BTS3812E/BTS3812A
About This Chapter
The RF subsystem consists of MAFUs and MTRUs and processes the RF signals.
6.1 Components of the BTS3812E/BTS3812A RF Subsystem
The RF subsystem consists of MTRUs and MAFUs. The MTRU subrack contains MTRUs and
the MAFU subrack contains MAFUs. A pair of MTRU and MAFU processes bi-carrier signals
over one transmit channel and two receive channels.
6.2 Functions of the BTS3812E/BTS3812A RF Subsystem
The boards of the RF subsystem form the receive channel and transmit channel to process the
uplink RF signals and downlink RF signals.
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40. BTS3812E and BTS3812A
6 RF Subsystem of the BTS3812E/BTS3812A Product Description
6.1 Components of the BTS3812E/BTS3812A RF Subsystem
The RF subsystem consists of MTRUs and MAFUs. The MTRU subrack contains MTRUs and
the MAFU subrack contains MAFUs. A pair of MTRU and MAFU processes bi-carrier signals
over one transmit channel and two receive channels.
Figure 6-1 shows the components of the RF subsystem.
Figure 6-1 Components of the RF subsystem
For details about the MTRU, refer to MTRU Module.
For details about the MAFU, refer to MAFU Module.
6.2 Functions of the BTS3812E/BTS3812A RF Subsystem
The boards of the RF subsystem form the receive channel and transmit channel to process the
uplink RF signals and downlink RF signals.
Figure 6-2 shows the functions of the RF subsystem.
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41. BTS3812E and BTS3812A
Product Description 6 RF Subsystem of the BTS3812E/BTS3812A
Figure 6-2 Logical structure of the RF subsystem
Operating Principles of TX Channel
The RX channel functions as follows:
1. The MTRUs receive the downlink data distributed by the HBBI.
2. The MTRU converts the data into small RF signals at WCDMA transmit band through
pulse-shaping filtering, DUC, DAC, intermediate analog signal amplification, and up-
conversion.
3. The HPA amplifies the small signals.
4. The MTRU sends RF signals to the MAFU.
5. The MAFU duplexer filters the signals, and then the MAFU sends the signals to the antenna
through the feeder.
6. The antenna transmits the signals.
Operating Principles of RX Channel
In two-way receive diversity mode, two ports of the antenna system receive UL signals from
UEs simultaneously. One port is used to receive and transmit signals while the other is used to
receive signals only.
The RX channel functions as follows:
1. Antennas of the two-port antenna system receive weak signals from UEs and send them to
the MAFU through feeders.
2. In MAFUs, the duplexers filter the signals from the receiving-and-transmitting port and
the low noise amplifiers (LNAs) amplify the signals. Then the UL signals are sent to the
MTRU.
3. In MAFUs, the filters process the signals from the receiving-only port and the LNAs
amplify the signals. Then the UL signals are sent to the MTRU.
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42. BTS3812E and BTS3812A
6 RF Subsystem of the BTS3812E/BTS3812A Product Description
4. The MTRUs process the signals and send them to the HBBIs after amplification, down-
conversion, ADC, DDC, matched filtering, and DAGC.
NOTE
l If you configure a TMA, it can bypass the DL transmit signals to the antenna. Also, the TMA amplifies
the UL signals and sends them to the MAFUs through the feeder.
l As shown in Figure 6-2, the common TX/RX port is named ANT A, and the RX port is named ANT
B.
l For the single cabinet, two HBBIs are connected to all MTRUs and work in mutual backup mode.
For the two combined cabinets, one HBBI is connected to the MTRUs in the primary cabinet, and
the other HBBI is connected to the MTRUs in the secondary cabinet. The two HBBIs work
independently.
l Two RX channels can be configured with RX diversity function.
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43. BTS3812E and BTS3812A
Product Description 7 Control Subsystem of the BTS3812E/BTS3812A
7 Control Subsystem of the BTS3812E/
BTS3812A
About This Chapter
The control subsystem consists of the NMPT and the NMON. The control subsystem controls
and manages the entire NodeB system.
7.1 Components of the BTS3812E/BTS3812A Control Subsystem
The control subsystem consists of the NMPT and NMON. The NMON is optional.
7.2 Functions of the BTS3812E/BTS3812A Control Subsystem
The control subsystem consists of the NMPT and NMON. The control subsystem controls and
manages the entire NodeB system.
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44. BTS3812E and BTS3812A
7 Control Subsystem of the BTS3812E/BTS3812A Product Description
7.1 Components of the BTS3812E/BTS3812A Control
Subsystem
The control subsystem consists of the NMPT and NMON. The NMON is optional.
Positions of the NMPT and NMON in the baseband subrack is shown in Figure 7-1.
Figure 7-1 Positions of the NMPT and NMON in the baseband subrack
7.2 Functions of the BTS3812E/BTS3812A Control
Subsystem
The control subsystem consists of the NMPT and NMON. The control subsystem controls and
manages the entire NodeB system.
The functions of the control subsystem are as follows:
l Managing the configuration
l Managing resource
l Providing various reference clocks for the entire NodeB
l Processing signaling over the Iub interface: processing NBAP signaling, processing
ALCAP signaling, and processing SCTP signaling, and managing logic resource
l Operating and maintaining: managing the device, configuration, alarms, software, and
commissioning
l Monitoring the working state of the NodeB
l Providing the input and output control interface for the NodeB
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45. BTS3812E and BTS3812A
Product Description 8 Power subsystem of the BTS3812E
8 Power subsystem of the BTS3812E
About This Chapter
The power subsystem of the BTS3812E is composed of the power subrack at the cabinet bottom
and the power distribution subsystem inside the cabinet. The BTS3812E uses –48 V DC, +24
V DC, or 220 V AC power supply.
8.1 Components of the BTS3812A Power Subsystem
The power subsystem of the BTS3812E consists of the power subrack at the cabinet bottom,
power input terminal at the cabinet top, and the power distribution subsystem inside the cabinet.
The power supply subsystem differs according to the type of the input power.
8.2 Power distribution of the BTS3812E
According to the input power, the BTS3812E power distribution is classified into the –48 V DC
power distribution, +24 V DC power distribution, and 220 V AC power distribution.
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46. BTS3812E and BTS3812A
8 Power subsystem of the BTS3812E Product Description
8.1 Components of the BTS3812A Power Subsystem
The power subsystem of the BTS3812E consists of the power subrack at the cabinet bottom,
power input terminal at the cabinet top, and the power distribution subsystem inside the cabinet.
The power supply subsystem differs according to the type of the input power.
Figure 8-1 shows the components of the BTS3812E power subsystem.
Figure 8-1 Components of the BTS3812E power subsystem
l When the BTS3812E uses the 220 V AC input power, the power subrack needs configure
a converter that changes the 220 V AC power supply into the –48 V DC power supply.
l When the BTS3812E uses the +24 V DC input power, the power subrack needs configure
a converter that changes the +24 V DC power supply into the –48 V DC power supply.
l When the BTS3812E uses the –48 V DC input power, the power subrack is not configured.
8.2 Power distribution of the BTS3812E
According to the input power, the BTS3812E power distribution is classified into the –48 V DC
power distribution, +24 V DC power distribution, and 220 V AC power distribution.
The power supply enters the BTS3812E at the cabinet top. When the BTS3812E uses the 220
V AC input power or +24 V DC input power, the input power is converted into the –48 V DC
power supply in the power subrack before being sent to the busbar. When the BTS3812E uses
the –48 V DC input power, the input power is directly sent to the busbar. The devices inside the
cabinet get power from the busbar. Figure 8-2 shows the power distribution of the BTS3812E.
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47. BTS3812E and BTS3812A
Product Description 8 Power subsystem of the BTS3812E
Figure 8-2 Power distribution of the BTS3812E
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49. BTS3812E and BTS3812A
Product Description 9 Power Subsystem of the BTS3812A
9 Power Subsystem of the BTS3812A
About This Chapter
The BTS3812A power subsystem is composed of the surge protection filter subrack, power
subrack, AC power distribution subrack, batteries, busbar, and load.
9.1 Components of the BTS3812A Power Subsystem
The BTS3812A power subsystem is composed of the surge protection filter subrack, power
subrack, AC power distribution subrack, batteries, and busbar.
9.2 Power Distribution of the BTS3812A
The AC power input of the BTS3812A is processed with surge protection, EMI filtering, AC
power distribution, rectifying, and DC power distribution before the power is supplied to the
internal components of the cabinet.
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50. BTS3812E and BTS3812A
9 Power Subsystem of the BTS3812A Product Description
9.1 Components of the BTS3812A Power Subsystem
The BTS3812A power subsystem is composed of the surge protection filter subrack, power
subrack, AC power distribution subrack, batteries, and busbar.
Figure 9-1 shows the components of the BTS3812A power subsystem.
Figure 9-1 Components of the BTS3812A power subsystem
For details about the components of the BTS3812A power subsystem, refer to 2.2 Introduction
to the BTS3812A.
9.2 Power Distribution of the BTS3812A
The AC power input of the BTS3812A is processed with surge protection, EMI filtering, AC
power distribution, rectifying, and DC power distribution before the power is supplied to the
internal components of the cabinet.
Block diagram of the BTS3812A power distribution
Figure 9-2 shows the power distribution of the BTS3812A. As shown in the block diagram, the
BTS3812A power distribution subsystem are categorized into the AC distribution part and DC
distribution part.
l The BTS3812A AC power input is processed with surge protection and EMI filtering before
it is sent to the AC power distribution unit.
l From the AC distribution unit, the power is supplied to PSUs and the heat exchanger.
l After the AC power is rectified by PSUs, the –48 V DC power is output. Then the DC
power is distributed to the internal components of the cabinet through the busbar.
l In order to minimize the impact from power failure, batteries are configured to the
BTS3812A for power backup.
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51. BTS3812E and BTS3812A
Product Description 9 Power Subsystem of the BTS3812A
Figure 9-2 Power Distribution of the BTS3812A
AC Power Distribution
The BTS3812A supports both the single-phase and 3-phase AC power inputs.
The 3-phase AC power passes through the surge protector and the EMI filter before it is led to
the AC distribution unit. From the AC distribution unit, the power is distributed to the heat
exchanger, PSUs, and reserved power sockets. MCBs are applied to protecting the circuits.
Figure 9-2 shows the AC power distribution. The AC power goes through the AC distribution
unit and reaches PSUs on three paths as follows:
l PSU 1, PSU 4, and PSU 5 on one path;
l PSU 2 and PSU 6 on another path;
l PSU 3 and PSU 7 on the third path.
MCBs, surge protectors, and EMI filters are all installed in the surge protection and filter subrack.
PSUs are installed in the power subrack.
When the single-phase AC power input is applied, you should use copper bars to connect the
three phase wires L1, L2, and L3 on the AC surge protector. Power distribution inside the
BTS3812A cabinet is the same as that of the 3-phase AC power input.
DC Power Distribution
PSUs convert AC power and provides –48 V DC power to the busbar. The DC power is supplied
to the following units through the 12 power switches on the busbar:
l MTRU 0 through MTRU 5
l MAFU
l Baseband subrack
l NFAN Subrack
l Lamp
l Transmission devices
l Fans in the heat exchanger
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