NodeB Technical Description(V200_05)
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NodeB
V200
Technical Description
Issue 05
Date 2009-12-10
Huawei Proprietary and Confidential
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All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
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Contents
About This Document.....................................................................................................................1
1 Changes in the NodeB Technical Description.....................................................................1-1
2 Functions of the NodeB.............................................................................................................2-1
3 Logical Structure of the NodeB...............................................................................................3-1
3.1 Logical Structure of the BBU3900..................................................................................................................3-2
3.2 Logical Structure of the RRU..........................................................................................................................3-3
3.3 Logical Structure of the WRFU......................................................................................................................3-5
3.4 Logical Structure of the RHUB3808...............................................................................................................3-7
3.5 Logical Structure of the pRRU3801................................................................................................................3-7
4 Hardware Configuration of the NodeB.................................................................................4-1
4.1 Hardware Configurations of the BTS3900......................................................................................................4-2
4.1.1 Typical Configurations...........................................................................................................................4-24.1.2 Configuration in 4-Way RX Diversity...................................................................................................4-5
4.1.3 Configuration in TX Diversity...............................................................................................................4-6
4.1.4 2 x 2 MIMO Configuration....................................................................................................................4-8
4.2 Hardware Configurations of the BTS3900A.................................................................................................4-10
4.2.1 Typical Configurations.........................................................................................................................4-11
4.2.2 Configuration in 4-Way RX Diversity.................................................................................................4-13
4.2.3 Configuration in TX Diversity.............................................................................................................4-15
4.2.4 2 x 2 MIMO Configuration..................................................................................................................4-17
4.3 Hardware Configurations of the BTS3900L.................................................................................................4-19
4.3.1 Typical Configurations.........................................................................................................................4-20
4.3.2 Configuration in 4-Way RX Diversity.................................................................................................4-22
4.3.3 Configuration in TX Diversity.............................................................................................................4-24
4.3.4 2 x 2 MIMO Configuration..................................................................................................................4-26
4.4 Hardware Configurations of the DBS3900...................................................................................................4-28
4.4.1 Typical Configuration..........................................................................................................................4-29
4.4.2 Configuration in 4-Way RX Diversity.................................................................................................4-33
4.4.3 Configuration in TX Diversity.............................................................................................................4-35
4.4.4 2 x 2 MIMO Configuration..................................................................................................................4-37
4.5 Hardware Configuration of the BTS3900C..................................................................................................4-40
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5 Monitoring Principles of the NodeB......................................................................................5-1
6 Topologies of the NodeB..........................................................................................................6-1
6.1 Topology on the Iub Interface.........................................................................................................................6-2
6.1.1 ATM-Based Topologies.........................................................................................................................6-2
6.1.2 IP-Based Topologies..............................................................................................................................6-4
6.2 Topology on the CPRI Interface.....................................................................................................................6-4
7 Clock Synchronization Mode of the NodeB.........................................................................7-1
8 Surge Protection Specifications for Ports on the NodeB....................................................8-1
9 Operation and Maintenance of the NodeB...........................................................................9-1
9.1 OM Modes of the NodeB................................................................................................................................9-2
9.2 OM Functions of the NodeB...........................................................................................................................9-3
10 Reliability of the NodeB.......................................................................................................10-1
Contents
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Figures
Figure 3-1 Logical structure of the BBU3900......................................................................................................3-2
Figure 3-2 Logical structure of the RRU3804 or RRU3801E..............................................................................3-3
Figure 3-3 Logical structure of the RRU3805 or RRU3808................................................................................3-4
Figure 3-4 Logical structure of the WRFU..........................................................................................................3-5
Figure 3-5 Logical structure of the RHUB3808...................................................................................................3-7
Figure 3-6 Logical structure of the pRRU3801 with optical ports.......................................................................3-8
Figure 3-7 Logical structure of the pRRU3801 with electrical ports...................................................................3-8
Figure 4-1 Installation slots of the boards of the BTS3900 in typical configurations.........................................4-3
Figure 4-2 Cable connections of the BTS3900 in 3 x 1 configuration.................................................................4-4
Figure 4-3 Cable connections of the BTS3900 in 3 x 4 configuration.................................................................4-4
Figure 4-4 Installation slots of the BTS3900 in 4-way RX diversity...................................................................4-5
Figure 4-5 Cable connections of the BTS3900 in 4-way RX diversity................................................................4-6
Figure 4-6 Installation slots of the boards of the BTS3900 in TX diversity........................................................4-7
Figure 4-7 Cable connections of the BTS3900 in TX diversity...........................................................................4-8Figure 4-8 Installation slots of the boards of the BTS3900 in 2 x 2 MIMO configuration.................................4-9
Figure 4-9 Cable connections of the BTS3900 in 2 x 2 MIMO configuration........................................... .......4-10
Figure 4-10 Installation slots of the boards of the BTS3900A in typical configurations...................................4-11
Figure 4-11 Cable connections of the BTS3900A in 3 x 1 configuration..........................................................4-12
Figure 4-12 Cable connections of the BTS3900A in 3 x 4 configuration..........................................................4-13
Figure 4-13 Installation slots of the BTS3900A in 4-way RX diversity............................................................4-14
Figure 4-14 Cable connections of the BTS3900A in 4-way RX diversity.........................................................4-15
Figure 4-15 Installation slots of the boards of the BTS3900A in TX diversity.................................................4-16
Figure 4-16 Cable connections of the BTS3900A in TX diversity....................................................................4-17
Figure 4-17 Installation slots of the boards of the BTS3900A in 2 x 2 MIMO configuration...........................4-18
Figure 4-18 Cable connections of the BTS3900A in 2 x 2 MIMO configuration.............................................4-19
Figure 4-19 Installation slots of the boards of the BTS3900L in typical configurations...................................4-20
Figure 4-20 Cable connections of the BTS3900L in 3 x 1 configuration..........................................................4-21
Figure 4-21 Cable connections of the BTS3900L in 3 x 4 configuration..........................................................4-22
Figure 4-22 Installation slots of the BTS3900L in 4-way RX diversity............................................................4-23
Figure 4-23 Cable connections of the BTS3900L in 4-way RX diversity.........................................................4-24
Figure 4-24 Installation slots of the boards of the BTS3900L in TX diversity..................................................4-25
Figure 4-25 Cable connections of the BTS3900L in TX diversity....................................................................4-26
Figure 4-26 Installation slots of the boards of the BTS3900L in 2 x 2 MIMO configuration...........................4-27
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Figure 4-27 Cable connections of the BTS3900L in 2 x 2 MIMO configuration..............................................4-28
Figure 4-28 Cable connections of the DBS3900 in 3 x 1 configuration (configured with the RRU3804)........4-30
Figure 4-29 Cable connections of the DBS3900 in 3 x 1 configuration (configured with the RRU3808)........4-31
Figure 4-30 Cable connections of the DBS3900 in 3 x 4 configuration (configured with the RRU3804)........4-32
Figure 4-31 Cable connections of the DBS3900 in 3 x 4 configuration (configured with the RRU3808)........4-33
Figure 4-32 Cable connections of the DBS3900 in 4-way RX diversity (configured with the RRU3804).......4-34
Figure 4-33 Cable connections of the DBS3900 in 4-way RX diversity (configured with the RRU3808).......4-35
Figure 4-34 Cable connections of the DBS3900 in TX diversity (configured with the RRU3804)..................4-36
Figure 4-35 Cable connections of the DBS3900 in TX diversity (configured with the RRU3808)..................4-37
Figure 4-36 Cable connections of the DBS3900 in 2 x 2 MIMO configuration (configured with the RRU3804)
.............................................................................................................................................................................4-39
Figure 4-37 Cable connections of the DBS3900 in 2 x 2 MIMO configuration (configured with the RRU3808)
.............................................................................................................................................................................4-40
Figure 4-38 Cable connections of the BTS3900C in 1 x 3 configuration..........................................................4-41
Figure 5-1 Monitoring principles of the BTS3900...............................................................................................5-1
Figure 5-2 Monitoring principles of the BTS3900A............................................................................................5-2
Figure 5-3 Monitoring principles of the BTS3900L............................................................................................5-2
Figure 5-4 Monitoring principles of the DBS3900..............................................................................................5-3
Figure 6-1 Star topology.......................................................................................................................................6-2
Figure 6-2 Chain topology................................................................................................................................... 6-3
Figure 6-3 Tree topology......................................................................................................................................6-3
Figure 6-4 IP hub topology.................................................................................................................................. 6-4
Figure 6-5 Topology between the BBU3900 and the RRU................................................................................. 6-5
Figure 6-6 Topology through CAT5/6 Ethernet cables........................................................................................6-5
Figure 6-7 Topology through optical cables........................................................................................................ 6-6
Figure 6-8 Hybrid topology..................................................................................................................................6-6
Figure 6-9 Hybrid Topology between the RRU and the pRRU...........................................................................6-7
Figure 9-1 OM subsystem of the NodeB..............................................................................................................9-2
Figures
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Tables
Table 4-1 Number of modules used for the BTS3900 in typical configurations.................................................4-2
Table 4-2 Number of modules used for the BTS3900 in 4-way RX diversity.....................................................4-5
Table 4-3 Number of modules used for the BTS3900 in TX diversity................................................................4-7
Table 4-4 Number of modules used for the BTS3900 in 2 x 2 MIMO configuration..........................................4-9
Table 4-5 Number of modules used for the BTS3900A in typical configurations.............................................4-11
Table 4-6 Number of modules used for the BTS3900A in 4-way RX diversity................................................4-13
Table 4-7 Number of modules used for the BTS3900A in TX diversity...........................................................4-15
Table 4-8 Number of modules used for the BTS3900A in 2 x 2 MIMO configuration.....................................4-18
Table 4-9 Number of modules used for the BTS3900L in typical configurations.............................................4-20
Table 4-10 Number of modules used for the BTS3900L in 4-way RX diversity..............................................4-22
Table 4-11 Number of modules used for the BTS3900L in TX diversity..........................................................4-24
Table 4-12 Number of modules used for the BTS3900L in 2 x 2 MIMO configuration...................................4-27
Table 4-13 Number of modules used for the DBS3900 in typical configurations.............................................4-29
Table 4-14 Number of modules used for the DBS3900 in 4-way RX diversity................................................4-33Table 4-15 Number of modules used for the DBS3900 in TX diversity............................................................4-35
Table 4-16 Number of modules used for the DBS3900 in 2 x 2 MIMO configuration.....................................4-38
Table 4-17 Number of modules used for the BTS3900C in typical configurations...........................................4-40
Table 8-1 Surge protection specifications for the ports on the BTS3900............................................................8-1
Table 8-2 Surge protection specifications for the ports on the BTS3900A..........................................................8-2
Table 8-3 Surge protection specifications for the ports on the BTS3900L..........................................................8-2
Table 8-4 Surge protection specifications for the ports on the BTS3900C..........................................................8-2
Table 8-5 Surge protection specifications for the ports on the BBU3900..................................... .......................8-2
Table 8-6 Surge protection specifications for the ports on the RRU3804 or RRU3801E....................................8-3
Table 8-7 Surge protection specifications for the ports on the RRU3804 (AC)..................................................8-4
Table 8-8 Surge protection specifications for the ports on the RRU3808..................................... .......................8-4
Table 8-9 Surge protection specifications for the ports on the WRFU................................................................8-5
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About This Document
Purpose
This document describes the NodeB in terms of functions, logical structure, hardwareconfiguration, monitoring principles, topologies, clock synchronization modes, operation and
maintenance, and reliability.
Product Versions
The following table lists the product versions related to this document.
Product Name Product Version
BTS3900 WCDMA (hereinafter referred toas BTS3900)
V200R011
V200R012
BTS3900A WCDMA (hereinafter referred
to as BTS3900A)
V200R011
V200R012
BTS3900L WCDMA (hereinafter referred
to as BTS3900L)
V200R012
DBS3900 WCDMA (hereinafter referred to
as DBS3900)
V200R011
V200R012
iDBS3900 WCDMA (hereinafter referred
to as iDBS3900)
V200R011
V200R012
BTS3900C WCDMA (hereinafter referred
to as BTS3900C)
V200R011
V200R012
Intended Audience
NodeB
Technical Description About This Document
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This document is intended for:
l Network planners
l Field engineers
l System engineers
Change History
For changes in the document, see 1 Changes in the NodeB Technical Description.
Organization
1 Changes in the NodeB Technical Description
This describes the changes in theNodeB Technical Description.
2 Functions of the NodeB
Developed in compliance with the 3GPP R99/R4/R5/R6/R7/R8 FDD protocols, Huawei NodeB
has comprehensive functions and antenna system solutions.
3 Logical Structure of the NodeB
This describes the logical structures of the BBU3900, RRU, WRFU, RHUB3808, and
pRRU3801.
4 Hardware Configuration of the NodeB
This describes the hardware configuration of the BTS3900, BTS3900A, BTS3900L,
DBS3900, and BTS3900C.
5 Monitoring Principles of the NodeB
This describes the monitoring principles of the BTS3900, BTS3900A, BTS3900L, and
DBS3900.
6 Topologies of the NodeB
This describes the topologies of the NodeB, which consists of the networking on the Iub interface
and networking on the CPRI interface.
7 Clock Synchronization Mode of the NodeB
The NodeB supports clock synchronization with the Iub interface clock, GPS clock, BITS clock,
and IP clock. The NodeB also supports the free-run clock.
8 Surge Protection Specifications for Ports on the NodeB
This describes the surge protection specifications for the ports on the BTS3900, BTS3900A,
BTS3900L, BTS3900C, BBU3900, RRU, and WRFU.
9 Operation and Maintenance of the NodeB
The OM subsystem of the NodeB manages, monitors, and maintains the software, hardware,
and configuration of the NodeB. In addition, the OM subsystem provides various OM modesand multiple maintenance platforms to meet different maintenance requirements.
Change History
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10 Reliability of the NodeB
The NodeB features a new system architecture and a complete redundancy design. In addition,
the NodeB takes advantage of Huawei large-capacity ASIC chips to enhance the integration of
modules and to reduce the number of parts, thus significantly improving the system reliability.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Indicates a hazard with a high level of risk, which if not
avoided,will result in death or serious injury.
Indicates a hazard with a medium or low level of risk, which
if not avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation, which if not
avoided,could result in equipment damage, data loss,
performance degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save
time.
Provides additional information to emphasize or supplement
important points of the main text.
General Conventions
The general conventions that may be found in this document are defined as follows.
Convention Description
Times New Roman Normal paragraphs are in Times New Roman.
Boldface Names of files, directories, folders, and users are inboldface. For example, log in as userroot.
Italic Book titles are in italics.
Courier New Examples of information displayed on the screen are in
Courier New.
Command Conventions
The command conventions that may be found in this document are defined as follows.
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Convention Description
Boldface The keywords of a command line are in boldface.
Italic Command arguments are in italics.
[ ] Items (keywords or arguments) in brackets [ ] are optional.
{ x | y | ... } Optional items are grouped in braces and separated by
vertical bars. One item is selected.
[ x | y | ... ] Optional items are grouped in brackets and separated by
vertical bars. One item is selected or no item is selected.
{ x | y | ... }* Optional items are grouped in braces and separated by
vertical bars. A minimum of one item or a maximum of all
items can be selected.
[ x | y | ... ]* Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected.
GUI Conventions
The GUI conventions that may be found in this document are defined as follows.
Convention Description
Boldface Buttons, menus, parameters, tabs, window, and dialog titles
are in boldface. For example, clickOK.
> Multi-level menus are in boldface and separated by the ">"
signs. For example, choose File > Create > Folder.
Keyboard Operations
The keyboard operations that may be found in this document are defined as follows.
Format Description
Key Press the key. For example, press Enter and press Tab.
Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt
+A means the three keys should be pressed concurrently.
Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means
the two keys should be pressed in turn.
Mouse Operations
The mouse operations that may be found in this document are defined as follows.
Organization
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Action Description
Click Select and release the primary mouse button without moving
the pointer.
Double-click Press the primary mouse button twice continuously andquickly without moving the pointer.
Drag Press and hold the primary mouse button and move the
pointer to a certain position.
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1Changes in the NodeB Technical DescriptionThis describes the changes in theNodeB Technical Description.
05 (2009-12-10)
This is the fourth commercial release.
Compared with 04 (2009-11-25), this issue adds the following topics:
l Description of the BTS3900L
04 (2009-11-25)
This is the third commercial release.
Compared with 03 (2009-08-20), this issue adds the following topics:
l 2 Functions of the NodeB
l 7 Clock Synchronization Mode of the NodeB
l 3.4 Logical Structure of the RHUB3808
l 3.5 Logical Structure of the pRRU3801
l 8 Surge Protection Specifications for Ports on the NodeB
03 (2009-08-20)
This is the second commercial release.
Compared with 02 (2009-03-20), this issue adds the following topics:
l 4.1 Hardware Configurations of the BTS3900
l 4.2 Hardware Configurations of the BTS3900A
l 4.4 Hardware Configurations of the DBS3900
l 4.5 Hardware Configuration of the BTS3900C
l Description of the RRU3808
02 (2009-03-20)
This is the first commercial release.
NodeB
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Compared with 01 (2008-12-15), this issue incorporates the following changes:
The description of the MRFU is deleted.
01 (2008-12-15)This is the initial trial release.
1 Changes in the NodeB Technical Description
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2 Functions of the NodeBDeveloped in compliance with the 3GPP R99/R4/R5/R6/R7/R8 FDD protocols, Huawei NodeB
has comprehensive functions and antenna system solutions.
NOTE
Only some functions and features of the NodeB are described. For other features, see the corresponding
feature parameter description.
Basic Functions
2-antenna receive diversity
The 2-antenna receive diversity enables one signal to be received by two RX antennas and
combined after processing. As an anti-attenuation measure, 2-antenna receive diversityeffectively reduces the adverse impact by the attenuation. The receive diversity enhances the
receive capability of uplink channels. Compared with 1-antenna receive no diversity, 2-antenna
receive diversity requires two times the number of RX channels.
Cell Digital Combination and Split
Cell digital combination and split refers to when a cell under the NodeB is split into multiple
sectors to cover multiple areas through digital dividing and combining.
This function is applicable in scenarios of indoor coverage and highway and railway coverage.
Antennas of different sectors receive and transmit signals of the same cell, and the mapping
between the RRU or pRRU and cells can be flexibly adjusted through software configuration.
In addition, adjustment of hardware is not required in system capacity expansion and network
adjustment.
The DBS3900 and iDBS3900 support the cell digital combination and split function.
Fast Power Congestion Control (FCC)
FCC refers to the congestion control on the NodeB side, which is a supplement to the RNC
congestion control.
This function is used to quickly respond to and solve the overload problem, which prevents the
output power from exceeding the maximum power range allowed by the hardware.
Active TX Chain Gain Calibration
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The active TX chain gain calibration improves the accuracy of downlink TX power. The stability
of TX power is ensured through monitoring and digital channel gain adjustment, thus improving
the usage efficiency of the TX power.
Intelligently Out of Service
The intelligently out of service function is introduced because services are disrupted due to lack
of batteries or NodeB reset.
If the intelligently out of service function is enabled, the pilot TX power of the PCPICH of the
cell can be set to smooth reduction until UE is handed over other 2G or 3G cells. This can prevent
call drops.
Orthogonal Channel Noise Simulation
The orthogonal channel noise simulation can be conducted by setting up multiple downlink
simulation channels at the air interface to simulate multiple code interference.
Single IP Address of the NodeB
This function enables one IP address to be used by both the service channel and OM channel of
the NodeB. This reduces IP address resource usage and simplifies IP address settings.
The function of single IP address of the NodeB can be used in the following scenarios:
l If the NodeB is configured with one WMPT: When the WMPT uses one or more IP
interfaces, the OM channel of the NodeB can use the same IP address as one of the IP
interfaces. If the NodeB uses the redundant OM channels, the IP addresses of the OM
channels can be the same as those of the two interfaces.
l If the NodeB is configured with one WMPT and one UTRP: When the WMPT and UTRP
use the inter-board MLPPP function, and one MLPPP group is bound with the WMPT, the
NodeB provides only one MLPPP group externally, and the OM channel of the NodeB hasthe same IP address as the MLPPP group.
NOTE
This function is supported from V200R012.
Antenna System Solution
l The TMA is supported, and the Antenna Interface Standard Group (AISG) 1.1 and AISG
2.0 are complied.
l The RET antenna is supported and remote calibration in batches is supported.
l The antenna can be shared by 2G and 3G systems, and Same band Antenna Sharing Unit
(SASU) and Same band Antenna Sharing Adapter (SASA) can be applied in such scenarios.
2 Functions of the NodeB
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3 Logical Structure of the NodeBAbout This Chapter
This describes the logical structures of the BBU3900, RRU, WRFU, RHUB3808, and
pRRU3801.
3.1 Logical Structure of the BBU3900
The BBU3900, which features a modular design, consists of the control subsystem, transport
subsystem, baseband subsystem, and power module.
3.2 Logical Structure of the RRU
The RRU, which features a modular design, consists of the interface module, transceiver (TRX),
Power Amplifier (PA), filter, Low Noise Amplifier (LNA), and power module.
3.3 Logical Structure of the WRFU
The WRFU, which features a modular design, consists of the interface module, transceiver
(TRX), Power Amplifier (PA), filter, Low Noise Amplifier (LNA), extended interface, and
power module.
3.4 Logical Structure of the RHUB3808
This describes the logical structure of the RHUB3808. The RHUB3808 has a modular design
and consists of the BB interface unit, combining and dividing unit, RRU interface unit, and
power supply unit.
3.5 Logical Structure of the pRRU3801
This describes the logical structure of the pRRU3801. The pRRU3801, which features a modular
design, consists of the interface unit, TRX, High Power Amplifier (HPA), LNA, duplexer, and
power supply unit.
NodeB
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3.1 Logical Structure of the BBU3900
The BBU3900, which features a modular design, consists of the control subsystem, transport
subsystem, baseband subsystem, and power module.
Figure 3-1 shows the logical structure of the BBU3900.
Figure 3-1 Logical structure of the BBU3900
Control Subsystem
The functions of the control subsystem are implemented by the WMPT.
The control subsystem performs centralized management of the entire NodeB in terms of OM
and signaling processing and provides the system clock.
l The OM functions involve equipment management, configuration management, alarm
management, software management, and commissioning management.
l The signaling processing functions involve NodeB Application Part (NBAP) signaling
processing, Access Link Control Application Part (ALCAP) processing, Stream Control
Transmission Protocol (SCTP) processing, and logical resource management.
l The clock module provides the system clock for the NodeB. The clock module supportssynchronization with external clocks such as the Iub clock, GPS clock, BITS clock, and IP
clock, which ensures that clock accuracy meets the requirements.
Baseband Subsystem
The functions of the baseband subsystem are implemented by the WBBP.
The baseband subsystem processes UL and DL baseband signals. This subsystem consists of
the following modules:
l UL baseband data processing module: consists of the demodulation unit and the decoding
unit. In this module, uplink baseband data is processed into despreading soft decisionsymbols after access channel searching, access channel demodulation, and dedicated
3 Logical Structure of the NodeB
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channel demodulation. The symbols are then sent to the RNC through the transport
subsystem after decoding and Frame Protocol (FP) processing.
l DL baseband data processing module: consists of the modulation unit and the encoding
unit. The module receives the service data from the transport subsystem and sends the
service data to the FP processor for FP processing. The signals are finally sent to theinterface module after encoding, transport channel mapping, physical channel generating,
framing, spreading, modulation, and power control combination.
In the baseband subsystem, the BBU3900 has an integrated CPRI interface module that connects
the BBU3900 to the RF module.
Transport Subsystem
The functions of the transport subsystem are implemented by the WMPT and UTRP. The
transport subsystem performs the following functions:
l Provides ports for communication between the NodeB and the RNC.
l Provides maintenance channels between the BBU3900 and the LMT or the M2000 to
operate and maintain the BBU3900.
Power Module
The power module converts +24 V DC or -48 V DC power into the power required by the boards
and provides external monitoring ports.
3.2 Logical Structure of the RRU
The RRU, which features a modular design, consists of the interface module, transceiver (TRX),Power Amplifier (PA), filter, Low Noise Amplifier (LNA), and power module.
Figure 3-2 shows the logical structure of the RRU3804 or RRU3801E.
Figure 3-2 Logical structure of the RRU3804 or RRU3801E
Figure 3-3 shows the logical structure of the RRU3805 or RRU3808.
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Figure 3-3 Logical structure of the RRU3805 or RRU3808
Interface Module
The interface module performs the following functions:
l Receives the downlink baseband data from the BBU.
l Transmits the uplink baseband data to the BBU.
l Forwards data from the cascaded RRUs.
Transceiver (TRX)
The TRX of the RRU3804 or RRU3801E provides two RX channels and one TX channel for
RF signals.
The TRX of the RRU3805 or RRU3808 provides two RX channels and two TX channels for
RF signals.
l The TRX performs the following functions at the RX channels:
Down-converts the received signals to Intermediate Frequency (IF) signals.
Amplifies the IF signals.
Performs Analog-to-Digital Conversion (DAC).
Performs digital down-conversion.
Performs matched filtering.
Performs Digital Automatic Gain Control (DAGC).
l The TRX performs the following functions at the TX channels:
Shaping and filtering of downlink spread spectrum signals
Performs Digital-to-Analog Conversion (DAC).
Up-converts IF signals to the TX band.
3 Logical Structure of the NodeB
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Power Amplifier (PA)
The PA adopts the DPD and A-Doherty technologies to amplify the low-power RF signals from
the TRX.
Filter
The filter of the RRU3804 or RRU3801E consists of a duplex filter and an RX filter.
The filter of the RRU3805 or RRU3808 consists of two duplex filters.
The filter performs the following functions:
l The duplex filter multiplexes one RX and one TX signals over RF channels so that they
can share one antenna channel. In addition, it filters RX and TX signals.
l The RX filter filters one RX signal.
LNA
The LNA amplifies the signals received from the antenna system.
Power Module
The power module supplies power to other modules of the RRU.
3.3 Logical Structure of the WRFU
The WRFU, which features a modular design, consists of the interface module, transceiver
(TRX), Power Amplifier (PA), filter, Low Noise Amplifier (LNA), extended interface, and
power module.
Figure 3-4 shows the logical structure of the WRFU.
Figure 3-4 Logical structure of the WRFU
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Interface Module
The interface module performs the following functions:
l Receives the downlink baseband data from the BBU.
l Transmits the uplink baseband data to the BBU.
l Forwards data from the cascaded WRFUs.
Transceiver (TRX)
The TRX provides two RX channels and one TX channel for RF signals.
l The TRX performs the following functions at the RX channels:
Down-converts the received signals to Intermediate Frequency (IF) signals.
Amplifies the IF signals.
Performs Analog-to-Digital Conversion (DAC).
Performs digital down-conversion.
Performs matched filtering.
Performs Digital Automatic Gain Control (DAGC).
l The TRX performs the following functions at the TX channels:
Shapes and filters downlink spread spectrum signals.
Performs Digital-to-Analog Conversion (DAC).
Up-converts IF signals to the TX band.
Power Amplifier (PA)
The PA adopts the DPD and A-Doherty technologies to amplify the low-power RF signals from
the TRX.
Filter
The filters consist of a duplex filter and an RX filter. The filters perform the following functions:
l The duplex filter multiplexes one RX and one TX signals over RF channels so that they
can share one antenna channel. In addition, it filters RX and TX signals.l The RX filter filters one RX signal.
LNA
The LNA amplifies the signals received from the antenna system.
Power Module
The power module supplies power to other modules of the WRFU.
3 Logical Structure of the NodeB
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3.4 Logical Structure of the RHUB3808
This describes the logical structure of the RHUB3808. The RHUB3808 has a modular design
and consists of the BB interface unit, combining and dividing unit, RRU interface unit, and
power supply unit.
Figure 3-5 shows the logical structure of the RHUB3808.
Figure 3-5 Logical structure of the RHUB3808
The functions of each unit are as follows:
l BB interface unit: Provides the transmission interface for the BBU3900.
l Combining and dividing unit: Combines and divides the baseband IQ data and performs
the Digital Automatic Gain Control (DAGC) function.
l RRU interface unit: Provides the transmission port and -48 V DC power port for the
pRRU3801 with electrical port.
l Power supply unit: Supplies power to internal modules of the RHUB3808 and eight
pRRU3801s with electrical ports connected to the RHUB3808 when the unit obtains 110V AC input power from the external power system. This unit can also supply -48 V DC
power to the BBU3900 when the unit obtains 220 V AC input power from the external
power system.
3.5 Logical Structure of the pRRU3801
This describes the logical structure of the pRRU3801. The pRRU3801, which features a modular
design, consists of the interface unit, TRX, High Power Amplifier (HPA), LNA, duplexer, and
power supply unit.
Figure 3-6 and Figure 3-7 show the logical structures of the pRRU3801 with optical ports andthe pRRU3801 with electrical port.
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Figure 3-6 Logical structure of the pRRU3801 with optical ports
Figure 3-7 Logical structure of the pRRU3801 with electrical ports
The functions of each unit are as follows:
l Interface unit: provides the CPRI interface for the connection between the pRRU3801 with
optical ports and theBBU3900, and provides the Ethernet port for the connection between
the pRRU3801 with electrical port and the RHUB3808.
NOTE
l Through the interface unit, the pRRU3801 with optical ports can connect to the BBU3900 and
cascade with another pRRU3801.
l Through the interface unit, the pRRU3801 with electrical port can connect to only the
RHUB3808, and then the RHUB3808 can connect to theBBU3900 through the CPRI port.
l TRX: provides one RX channel and one TX channel, and processes the IF signals.
l HPA: receives the low-power RF signals from the TRX and amplifies these signals.
3 Logical Structure of the NodeB
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l LNA: amplifies the signals received by the antenna.
l Duplexer: multiplexes the RX signals and TX signals. This enables the RX signals and TX
signals to share one antenna channel.
l Power supply unit: distributes 48 V DC power in the pRRU3801.
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4Hardware Configuration of the NodeBAbout This Chapter
This describes the hardware configuration of the BTS3900, BTS3900A, BTS3900L,
DBS3900, and BTS3900C.
4.1 Hardware Configurations of the BTS3900
This describes the hardware configurations of the BTS3900 in typical configuration, 4-way RX
diversity, TX diversity, and 2 x 2 MIMO.
4.2 Hardware Configurations of the BTS3900A
This describes the hardware configurations of the BTS3900A in typical configuration, 4-way
RX diversity, TX diversity, and 2 x 2 MIMO.
4.3 Hardware Configurations of the BTS3900L
This describes the hardware configurations of the BTS3900L in typical configuration, 4-way
RX diversity, TX diversity, and 2 x 2 MIMO.
4.4 Hardware Configurations of the DBS3900
This describes the hardware configurations of the DBS3900 in typical configuration, 4-way RX
diversity, TX diversity, and 2 x 2 MIMO.
4.5 Hardware Configuration of the BTS3900C
The maximum configuration that the BTS3900C supports is 1 x 3.
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4.1 Hardware Configurations of the BTS3900
This describes the hardware configurations of the BTS3900 in typical configuration, 4-way RX
diversity, TX diversity, and 2 x 2 MIMO.
4.1.1 Typical Configurations
This describes the typical configurations of the BTS3900. The BTS3900 supports omni-
directional, 2-sector, 3-sector, and 6-sector configurations. It also supports smooth capacity
expansion from 1 x 1 to 6 x 4 or 3 x 8.
4.1.2 Configuration in 4-Way RX Diversity
The BTS3900 supports 4-way RX diversity.
4.1.3 Configuration in TX Diversity
The BTS3900 supports TX diversity.
4.1.4 2 x 2 MIMO Configuration
The BTS3900 supports the 2 x 2 MIMO configuration.
4.1.1 Typical Configurations
This describes the typical configurations of the BTS3900. The BTS3900 supports omni-
directional, 2-sector, 3-sector, and 6-sector configurations. It also supports smooth capacity
expansion from 1 x 1 to 6 x 4 or 3 x 8.
In typical configurations, the mandatory boards of the BTS3900 are the WMPT, WBBP, and
WRFU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The followingdescription takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the typical configuration of the BTS3900.
Number of Modules
Table 4-1 lists the number of modules used for the BTS3900 in typical configurations.
Table 4-1 Number of modules used for the BTS3900 in typical configurations
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting Six
Cells)
Number of WRFUs(No TX Diversity)
3 x 1 1 1 3
3 x 2 1 1 3
3 x 3 1 2 3
3 x 4 1 2 3
NOTE
N x M = sector x carrier. For example, 3 x 1 indicates that each of the three sectors has one carrier.
4 Hardware Configuration of the NodeB
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Installation Slots
Figure 4-1 shows the installation slots of the boards of the BTS3900 in typical configurations.
Figure 4-1 Installation slots of the boards of the BTS3900 in typical configurations
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-2 and Figure 4-3 show the cable connections of the BTS3900, where the 3 x 1 and 3
x 4 configurations are taken as an example respectively.
NOTE
A single sector is taken as an example to describe the cable connections.
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Figure 4-2 Cable connections of the BTS3900 in 3 x 1 configuration
(1) RF jumper (2) CPRI electrical cable
Figure 4-3 Cable connections of the BTS3900 in 3 x 4 configuration
(1) RF jumper (2) CPRI electrical cable
4 Hardware Configuration of the NodeB
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4.1.2 Configuration in 4-Way RX Diversity
The BTS3900 supports 4-way RX diversity.
In 4-way RX diversity, the mandatory boards of the BTS3900 are the WMPT, WBBP, and
WRFU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the configuration of the BTS3900 in 4-way RX diversity.
Number of Modules
Table 4-2 lists the number of modules used for the BTS3900 in 4-way RX diversity.
Table 4-2 Number of modules used for the BTS3900 in 4-way RX diversity
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs
3 x 1 1 1 6
3 x 2 1 2 6
NOTE
In the case of 4-way economical mode, the WBBP that originally supports six cells can support only three
cells; the processing capability of the WBBP that supports three cells remains unchanged.
Installation Slots
Table 4-2 shows the installation slots of the BTS3900 in 4-way RX diversity.
Figure 4-4 Installation slots of the BTS3900 in 4-way RX diversity
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For detailsabout the slots of the BBU3900, see the BBU3900 Hardware Description.
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Cable Connections
Figure 4-5 shows the cable connections of the BTS3900 in 4-way RX diversity, where the 3 x
1 configuration is taken as an example.
NOTE
A single sector is taken as an example to describe the cable connections.
Figure 4-5 Cable connections of the BTS3900 in 4-way RX diversity
(1) RF jumper (2) CPRI electrical cable
4.1.3 Configuration in TX DiversityThe BTS3900 supports TX diversity.
In TX diversity, the mandatory boards of the BTS3900 are the WMPT, WBBP, and WRFU. The
WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the configuration of the BTS3900 in TX diversity.
Number of Modules
Table 4-3 lists the number of modules used for the BTS3900 in TX diversity.
4 Hardware Configuration of the NodeB
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Table 4-3 Number of modules used for the BTS3900 in TX diversity.
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs
3 x 1 1 1 6
3 x 2 1 2 6
NOTE
In the case of TX diversity, the WBBP that originally supports six cells can support only three cells; the
processing capability of the WBBP that supports three cells remains unchanged.
Installation SlotsFigure 4-6 shows the installation slots of the boards of the BTS3900 in TX diversity.
Figure 4-6 Installation slots of the boards of the BTS3900 in TX diversity
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-7 shows the cable connections of the BTS3900 in TX diversity, where the 3 x 1
configuration is taken as an example.
NOTE
l A single sector is taken as an example to describe the cable connections.
l Starting from the V200R012, the inter-RFU RF signal cable is not required for interconnection
between the WRFUs when the RF interconnection mode is configured through the software.
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Figure 4-7 Cable connections of the BTS3900 in TX diversity
(1) RF jumper (2) Inter-RFU RF signal cable (3) CPRI electrical cable
4.1.4 2 x 2 MIMO Configuration
The BTS3900 supports the 2 x 2 MIMO configuration.
In 2 x 2 MIMO configuration, the mandatory boards of the BTS3900 are the WMPT, WBBP,
and WRFU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the 2 x 2 MIMO configuration of the BTS3900.
Number of Modules
Table 4-4 lists the number of modules used for the BTS3900 in 2 x 2 MIMO configuration.
4 Hardware Configuration of the NodeB
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Table 4-4 Number of modules used for the BTS3900 in 2 x 2 MIMO configuration
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs
3 x 1 1 1 6
3 x 2 1 2 6
NOTE
In the case of 2 x 2 MIMO configuration, the WBBP that originally supports six cells can support only
three cells; the processing capability of the WBBP that supports three cells remains unchanged.
Installation SlotsFigure 4-8 shows the installation slots of the boards of the BTS3900 in 2 x 2 MIMO
configuration.
Figure 4-8 Installation slots of the boards of the BTS3900 in 2 x 2 MIMO configuration
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-9 shows the cable connections of the BTS3900 in 2 x 2 MIMO configuration, where
the 3 x 1 configuration is taken as an example.
NOTE
l A single sector is taken as an example to describe the cable connections.
l Starting from the V200R012, the inter-RFU RF signal cable is not required for interconnection
between the WRFUs when the RF interconnection mode is configured through the software.
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Figure 4-9 Cable connections of the BTS3900 in 2 x 2 MIMO configuration
(1) RF jumper (2) Inter-RFU RF signal cable (3) CPRI electrical cable
4.2 Hardware Configurations of the BTS3900A
This describes the hardware configurations of the BTS3900A in typical configuration, 4-way
RX diversity, TX diversity, and 2 x 2 MIMO.
4.2.1 Typical Configurations
This describes the typical configurations of the BTS3900A. The BTS3900A supports omni-
directional, 2-sector, 3-sector, and 6-sector configurations. It also supports smooth capacity
expansion from 1 x 1 to 6 x 4 or 3 x 8.
4.2.2 Configuration in 4-Way RX Diversity
The BTS3900A supports 4-way RX diversity.
4.2.3 Configuration in TX Diversity
The BTS3900A supports TX diversity.
4.2.4 2 x 2 MIMO ConfigurationThe BTS3900A supports the 2 x 2 MIMO configuration.
4 Hardware Configuration of the NodeB
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4.2.1 Typical Configurations
This describes the typical configurations of the BTS3900A. The BTS3900A supports omni-
directional, 2-sector, 3-sector, and 6-sector configurations. It also supports smooth capacity
expansion from 1 x 1 to 6 x 4 or 3 x 8.
In typical configurations, the mandatory boards of the BTS3900A are the WMPT, WBBP, and
WRFU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the typical configurations of the BTS3900A.
Number of Modules
Table 4-5 lists the number of modules used for the BTS3900A in typical configurations.
Table 4-5 Number of modules used for the BTS3900A in typical configurations
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs(No TX Diversity)
3 x 1 1 1 3
3 x 2 1 1 3
3 x 3 1 2 3
3 x 4 1 2 3
NOTE
N x M = sector x carrier. For example, 3 x 1 indicates that each of the three sectors has one carrier.
Installation Slots
Figure 4-10 shows the installation slots of the boards of the BTS3900A in typical configurations.
Figure 4-10 Installation slots of the boards of the BTS3900A in typical configurations
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NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slots 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-11 and Figure 4-12 show the cable connections of the BTS3900A, where the 3 x 1
and 3 x 4 configurations are taken as an example respectively.
NOTE
A single sector is taken as an example to describe the cable connections.
Figure 4-11 Cable connections of the BTS3900A in 3 x 1 configuration
(1) RF jumper (2) CPRI electrical cable
4 Hardware Configuration of the NodeB
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Figure 4-12 Cable connections of the BTS3900A in 3 x 4 configuration
(1) RF jumper (2) CPRI electrical cable
4.2.2 Configuration in 4-Way RX Diversity
The BTS3900A supports 4-way RX diversity.
In 4-way RX diversity, the mandatory boards of the BTS3900A are the WMPT, WBBP, and
WRFU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the configuration of the BTS3900A in 4-way RX diversity.
Number of Modules
Table 4-6 lists the number of modules used for the BTS3900A in 4-way RX diversity.
Table 4-6 Number of modules used for the BTS3900A in 4-way RX diversity
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs
3 x 1 1 1 6
3 x 2 1 2 6
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NOTE
In the case of 4-way economical mode, the WBBP that originally supports six cells can support only three
cells; the processing capability of the WBBP that supports three cells remains unchanged.
Installation Slots
Table 4-6 shows the installation slots of the BTS3900A in 4-way RX diversity.
Figure 4-13 Installation slots of the BTS3900A in 4-way RX diversity
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-14 shows the cable connections of the BTS3900A in 4-way RX diversity, where the3 x 1 configuration is taken as an example.
NOTE
A single sector is taken as an example to describe the cable connections.
4 Hardware Configuration of the NodeB
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Figure 4-14 Cable connections of the BTS3900A in 4-way RX diversity
(1) RF jumper (2) CPRI electrical cable
4.2.3 Configuration in TX Diversity
The BTS3900A supports TX diversity.
In TX diversity, the mandatory boards of the BTS3900A are the WMPT, WBBP, and WRFU.
The WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the configuration of the BTS3900A in TX diversity.
Number of ModulesTable 4-7 lists the number of modules used for the BTS3900A in TX diversity.
Table 4-7 Number of modules used for the BTS3900A in TX diversity.
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs
3 x 1 1 1 6
3 x 2 1 2 6
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NOTE
In the case of TX diversity, the WBBP that originally supports six cells can support only three cells; the
processing capability of the WBBP that supports three cells remains unchanged.
Installation Slots
Figure 4-15 shows the installation slots of the boards of the BTS3900A in TX diversity.
Figure 4-15 Installation slots of the boards of the BTS3900A in TX diversity
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-16 shows the cable connections of the BTS3900A in TX diversity, where the 3 x 1configuration is taken as an example.
NOTE
l A single sector is taken as an example to describe the cable connections.
l Starting from the V200R012, the inter-RFU RF signal cable is not required for interconnection
between the WRFUs when the RF interconnection mode is configured through the software.
4 Hardware Configuration of the NodeB
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Figure 4-16 Cable connections of the BTS3900A in TX diversity
(1) RF jumper (2) Inter-RFU RF signal cable (3) CPRI electrical cable
4.2.4 2 x 2 MIMO Configuration
The BTS3900A supports the 2 x 2 MIMO configuration.
In 2 x 2 MIMO configuration, the mandatory boards of the BTS3900A are the WMPT, WBBP,
and WRFU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs can support three cells or six cells according to their specifications. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the 2 x 2 MIMO configuration of the BTS3900A.
Number of Modules
Table 4-8 lists the number of modules used for the BTS3900A in 2 x 2 MIMO configuration.
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Table 4-8 Number of modules used for the BTS3900A in 2 x 2 MIMO configuration
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs
3 x 1 1 1 6
3 x 2 1 2 6
NOTE
In the case of 2 x 2 MIMO configuration, the WBBP that originally supports six cells can support only
three cells; the processing capability of the WBBP that supports three cells remains unchanged.
Installation SlotsFigure 4-17 shows the installation slots of the boards of the BTS3900A in 2 x 2 MIMO
configuration.
Figure 4-17 Installation slots of the boards of the BTS3900A in 2 x 2 MIMO configuration
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-18 shows the cable connections of the BTS3900A in 2 x 2 MIMO configuration, where
the 3 x 1 configuration is taken as an example.
NOTE
l A single sector is taken as an example to describe the cable connections.
l Starting from the V200R012, the inter-RFU RF signal cable is not required for interconnection
between the WRFUs when the RF interconnection mode is configured through the software.
4 Hardware Configuration of the NodeB
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Figure 4-18 Cable connections of the BTS3900A in 2 x 2 MIMO configuration
(1) RF jumper (2) Inter-RFU RF signal cable (3) CPRI electrical cable
4.3 Hardware Configurations of the BTS3900L
This describes the hardware configurations of the BTS3900L in typical configuration, 4-way
RX diversity, TX diversity, and 2 x 2 MIMO.
4.3.1 Typical Configurations
This describes the typical configurations of the BTS3900L. The BTS3900L supports omni-
directional, 2-sector, 3-sector, and 6-sector configurations. The maximum configuration that the
BTS3900L supports is 6 x 4 or 12 x 2. The BTS3900L is mainly applicable to multi-mode
scenarios.
4.3.2 Configuration in 4-Way RX Diversity
The BTS3900L supports 4-way RX diversity.
4.3.3 Configuration in TX Diversity
The BTS3900L supports TX diversity.
4.3.4 2 x 2 MIMO Configuration
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The BTS3900L supports the 2 x 2 MIMO configuration.
4.3.1 Typical Configurations
This describes the typical configurations of the BTS3900L. The BTS3900L supports omni-
directional, 2-sector, 3-sector, and 6-sector configurations. The maximum configuration that theBTS3900L supports is 6 x 4 or 12 x 2. The BTS3900L is mainly applicable to multi-mode
scenarios.
In typical configurations, the mandatory boards of the BTS3900L are the WMPT, WBBP, and
WRFU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the typical configurations of the BTS3900L.
Number of Modules
Table 4-9 lists the number of modules used for the BTS3900L in typical configurations.
Table 4-9 Number of modules used for the BTS3900L in typical configurations
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs(No TX Diversity)
3 x 1 1 1 3
3 x 2 1 1 3
3 x 3 1 2 3
3 x 4 1 2 3
NOTE
N x M = sector x carrier. For example, 3 x 1 indicates that each of the three sectors has one carrier.
Installation Slots
Figure 4-19 shows the installation slots of the boards of the BTS3900L in typical configurations.
Figure 4-19 Installation slots of the boards of the BTS3900L in typical configurations
4 Hardware Configuration of the NodeB
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NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slots 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-20 and Figure 4-21 show the cable connections of the BTS3900L, where the 3 x 1 and
3 x 4 configurations are taken as an example respectively.
NOTE
A single sector is taken as an example to describe the cable connections.
Figure 4-20 Cable connections of the BTS3900L in 3 x 1 configuration
(1) RF jumper (2) CPRI electrical cable
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Figure 4-21 Cable connections of the BTS3900L in 3 x 4 configuration
(1) RF jumper (2) CPRI electrical cable
4.3.2 Configuration in 4-Way RX Diversity
The BTS3900L supports 4-way RX diversity.
In 4-way RX diversity, the mandatory boards of the BTS3900L are the WMPT, WBBP, and
WRFU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the configuration of the BTS3900L in 4-way RX diversity.
Number of Modules
Table 4-10 lists the number of modules used for the BTS3900L in 4-way RX diversity.
Table 4-10 Number of modules used for the BTS3900L in 4-way RX diversity
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs
3 x 1 1 1 6
3 x 2 1 2 6
4 Hardware Configuration of the NodeB
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NOTE
In the case of 4-way economical mode, the WBBP that originally supports six cells can support only three
cells; the processing capability of the WBBP that supports three cells remains unchanged.
Installation Slots
Table 4-10 shows the installation slots of the BTS3900L in 4-way RX diversity.
Figure 4-22 Installation slots of the BTS3900L in 4-way RX diversity
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-23 shows the cable connections of the BTS3900L in 4-way RX diversity, where the 3
x 1 configuration is taken as an example.
NOTE
A single sector is taken as an example to describe the cable connections.
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Figure 4-23 Cable connections of the BTS3900L in 4-way RX diversity
(1) RF jumper (2) CPRI electrical cable
4.3.3 Configuration in TX Diversity
The BTS3900L supports TX diversity.
In TX diversity, the mandatory boards of the BTS3900L are the WMPT, WBBP, and WRFU.
The WMPT and WBBP are installed in the BBU3900.
The WBBPs of different specifications support three cells and six cells. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the configuration of the BTS3900L in TX diversity.
Number of ModulesTable 4-11 lists the number of modules used for the BTS3900L in TX diversity.
Table 4-11 Number of modules used for the BTS3900L in TX diversity.
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs
3 x 1 1 1 6
3 x 2 1 2 6
4 Hardware Configuration of the NodeB
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NOTE
In the case of TX diversity, the WBBP that originally supports six cells can support only three cells; the
processing capability of the WBBP that supports three cells remains unchanged.
Installation Slots
Figure 4-24 shows the installation slots of the boards of the BTS3900L in TX diversity.
Figure 4-24 Installation slots of the boards of the BTS3900L in TX diversity
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For details
about the slots of the BBU3900, see the BBU3900 Hardware Description.
Cable Connections
Figure 4-25 shows the cable connections of the BTS3900L in TX diversity, where the 3 x 1
configuration is taken as an example.
NOTE
l A single sector is taken as an example to describe the cable connections.
l Starting from the V200R012, the inter-RFU RF signal cable is not required for interconnection
between the WRFUs when the RF interconnection mode is configured through the software.
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Figure 4-25 Cable connections of the BTS3900L in TX diversity
(1) RF jumper (2) Inter-RFU RF signal cable (3) CPRI electrical cable
4.3.4 2 x 2 MIMO Configuration
The BTS3900L supports the 2 x 2 MIMO configuration.
In 2 x 2 MIMO configuration, the mandatory boards of the BTS3900L are the WMPT, WBBP,
and WRFU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs can support three cells or six cells according to their specifications. The following
description takes the WBBP supporting six cells and the WRFU supporting 80 W/4 carriers as
examples to describe the 2 x 2 MIMO configuration of the BTS3900L.
Number of Modules
Table 4-12 lists the number of modules used for the BTS3900L in 2 x 2 MIMO configuration.
4 Hardware Configuration of the NodeB
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Table 4-12 Number of modules used for the BTS3900L in 2 x 2 MIMO configuration
ConfigurationType
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of WRFUs
3 x 1 1 1 6
3 x 2 1 2 6
NOTE
In the case of 2 x 2 MIMO configuration, the WBBP that originally supports six cells can support only
three cells; the processing capability of the WBBP that supports three cells remains unchanged.
Installation Slots
Figure 4-26 shows the installation slots of the boards of the BTS3900L in 2 x 2 MIMO
configuration.
Figure 4-26 Installation slots of the boards of the BTS3900L in 2 x 2 MIMO configuration
NOTE
It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For details
about the slots of the BBU3900, see theBBU3900 Hardware Description.
Cable Connections
Figure 4-27 shows the cable connections of the BTS3900L in 2 x 2 MIMO configuration, where
the 3 x 1 configuration is taken as an example.
NOTE
l A single sector is taken as an example to describe the cable connections.
l Starting from the V200R012, the inter-RFU RF signal cable is not required for interconnection
between the WRFUs when the RF interconnection mode is configured through the software.
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Figure 4-27 Cable connections of the BTS3900L in 2 x 2 MIMO configuration
(1) RF jumper (2) Inter-RFU RF signal cable (3) CPRI electrical cable
4.4 Hardware Configurations of the DBS3900
This describes the hardware configurations of the DBS3900 in typical configuration, 4-way RX
diversity, TX diversity, and 2 x 2 MIMO.
4.4.1 Typical Configuration
This describes the typical configurations of the DBS3900. The DBS3900 supports omni-
directional, 2-sector, 3-sector, and 6-sector configurations. It also supports smooth capacity
expansion from 1 x 1 to 6 x 4 or 3 x 8.
4.4.2 Configuration in 4-Way RX Diversity
The DBS3900 supports 4-way RX diversity.
4.4.3 Configuration in TX Diversity
The DBS3900 supports TX diversity.
4.4.4 2 x 2 MIMO ConfigurationThe DBS3900 supports the 2 x 2 MIMO configuration.
4 Hardware Configuration of the NodeB
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4.4.1 Typical Configuration
This describes the typical configurations of the DBS3900. The DBS3900 supports omni-
directional, 2-sector, 3-sector, and 6-sector configurations. It also supports smooth capacity
expansion from 1 x 1 to 6 x 4 or 3 x 8.In typical configurations, the mandatory boards of the DBS3900 are the WMPT, WBBP, and
RRU. The WMPT and WBBP are installed in the BBU3900.
The WBBPs can support three cells or six cells according to their specifications. The following
description takes the WBBP supporting six cells, the RRU3804 supporting 60 W, and the
RRU3808 supporting 2 x 40 W as examples to describe the typical configuration of the
DBS3900.
Number of Modules
Table 4-13 lists the number of modules used for the DBS3900 in typical configurations.
Table 4-13 Number of modules used for the DBS3900 in typical configurations
Configuration Type
Number ofWMPTs
Number of WBBPs(Supporting SixCells)
Number of RRU3804s orRRU3808s (No TXDiversity)
3 x 1 1 1 3
3 x 2 1 1 3
3 x 3 1 2 3
3 x 4 1 2 3
NOTE
N x M = sector x carrier. For example, 3 x 1 indicates that each of the three sectors has one carrier.
Cable Connections
Figure 4-28, Figure 4-29, Figure 4-30, and Figure 4-31 show the cable connections of the
DBS3900, where the 3 x 1 and 3 x 4 configurations are taken as an example respectively.
NOTE
l It is recommended that the WBBP not using the CPRI interface not be installed in slot 2 or 3. For
details about the slots of the BBU3900, see theBBU3900 Hardware Description.
l The RRU3804 supports a maximum of 15 W per carrier in case of 4-carrier configuration.
l A single sector is taken as an example to describe the cable connections.
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Figure 4-28 Cable connections of the DBS3900 in 3 x 1 configuration (configured with the
RRU3804)
(1) Antenna jumper (2) CPRI optical cable
4 Hardware Configuration of the NodeB
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Figure 4-29 Cable connections of the DBS3900 in 3 x 1 configuration (configured with the
RRU3808)
(1) RF jumper (2) CPRI optical cable
NodeB
Technical Descripti