HUAWEI TECHNOLOGIES CO., LTD.
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Huawei Confidential
Security Level: Internal Use 23/4/13
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Introduction to New Functions of 3900 Series Dual-Mode Base Station
Wireless Case and Training
ISSUE1.0
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3900 series Dual-Mode Base Station features a multi-
mode modular design and supports three working
modes: GSM mode, GSM&UMTS dual mode, and
UMTS mode through configuration of different
software. It mainly introduces the two scenarios of
dual-mode base station and new functions.
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Know the two scenarios of dual-mode base station
Know the new functions and features of dual-mode
base station
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Chapter 1 Scenarios of 3900 Series Dual-Mode
Base station
Chapter 2 New Functions of 3900 Series Dual-
Mode Base Station Introduction
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Scenarios of 3900 Series Dual-ModeBase station The co-cabinet scenario
The BBU is configured with the GSM boards and UMTS boards. The RF
modules of the GSM system and the UMTS system are configured separately.
The transmission modules of the GSM system and the UMTS system are
independent of each other. The common parts inside the cabinet are controlled by the GSM and UMTS
system.
The dual-mode scenario Based on the unified hardware platform, the 3900 series supports three
working modes: GSM mode, GSM&UMTS dual mode, and UMTS mode
through configuration of different software.
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Chapter 1 Solutions of 3900 Series Dual-Mode
Base station
Chapter 2 New Functions of 3900 Series Dual-
Mode Base Station Introduction
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Section 1 MRRU/MRFU Supports Three Working Mode
Section 2 Interconnection of CPRI Port
Section 3 Co-Transmission Function
Section 4 Co-Monitoring System
Section 5 Support Configuration of XRRU/XRFU
Section 6 Function of Sharing the Clock Source
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MRRU/MRFU Supports Three Working Mode (The Dual-Mode Scenario)
MRRU/MRFU features the advanced platform-based architecture. It
supports three working modes: GSM mode, GSM&UMTS dual mode, and
UMTS mode. When the MRRU/MRFU works in GSM Only mode, it must be configured as
RRU3008/GRFU. When the MRRU/MRFU works in UMTS Only mode, it must be configured as
SRRU/WRFU. When the MRRU/MRFU works in GSM&UMTS mode, it must be configured as
MRRU/MRFU.
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Obtain the software version
Obtain software version from different directory when the TRX works in different
mode.
Board Working Mode Software Version
MRRU/MRFU GSM&UMTS UMTS software Package
GSM GSM software Package
UMTS UMTS software Package
MRRU/MRFU Supports Three Working Mode (The Dual-Mode Scenario)
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Section 1 MRRU/MRFU Supports Three Working Mode
Section 2 Interconnection of CPRI Port
Section 3 Co-Transmission Function
Section 4 Co-Monitoring System
Section 5 Support Configuration of XRRU/XRFU
Section 6 Function of Sharing the Clock Source
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Interconnection of CPRI Port(The Dual-Mode Scenario)
Functions When the GTMU is used in the GSM&UMTS scenario, three CPRI ports (0, 1,
and 2) on the GTMU of the GSM system can be connected to any of the CPRI
ports on the WBBP of the UMTS system, and the other three CPRI ports (3, 4,
and 5) can be connected to the RXU .
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Logical figure
Interconnection of CPRI Port(The Dual-Mode Scenario)
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Data Flowing
Downlink data which is converged in GTMU delivered from the CPRI port
connected to RXU. For example: Downlink data in SFP0 from WBBP
convergences the data of SFP3 in GTMU and then delivered it from SFP3.
Uplink data should be delivered to the
corresponding port of GTMU and WBBP
at the same time. For example: Uplink data
in SFP3 should be delivered to GTMU
board. The data also should be delivered
to SFP0 in GTMU and than to SFP0 in
WBBP at the same time.
Interconnection of CPRI Port(The Dual-Mode Scenario)
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Interconnection Principles of CPRI Port Only 0-2 CPRI ports on the GTMU can be connected to the CPRI ports on the
WBBP. 3-5 CPRI ports can be connected to the RXURU3908 . Only 0-2 CPRI ports can be switched to any of the 3-5 CPRI ports. (It needs
configuration) 0-2 CPRI ports on the GTMU can be connected to any of the CPRI ports on the
WBBP. (It needn’t configuration) CPRI ports which are not configured as SFP ports can be connected to RXU
as common port.
Notes The data is converged in GTMU. The server of UMTS will be affected when the
GTMU is faulty or reset. Only 0-2 CPRI ports can be switched to any of the 3-5 CPRI ports. If the site
transition from GO ( GSM Only ) to GU ( GSM&UMTS ) , it needs to
adjust former physical connection and data configuration.
Interconnection of CPRI Port(The Dual-Mode Scenario)
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Section 1 MRRU/MRFU Supports Three Working Mode
Section 2 Interconnection of CPRI Port
Section 3 Co-Transmission Function
Section 4 Co-Monitoring System
Section 5 Support Configuration of XRRU/XRFU
Section 6 Function of Sharing the Clock Source
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Function The GSM system and the UMTS system share the transmission resources.
Through the TDM timeslot cross connection, the backplane bus enables
transmission bandwidth sharing between the GSM system and the UMTS
system. This is called TDM Over Package (TOP).
Co-Transmission Function(Co-Cabinet Scenario/Dual-Mode Scenario)
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Application Scenario When the distance of BSC and RNC is near or BSC and RNC are in the same
equipment room, the co-transmission can be used. When co-transmission is used,
one cable carries two mode signals of GSM and UMTS which can save transmission
cable and reduce the cost. When the distance of BSC and RNC is far, the co-transmission cannot be used.
co-transmission non co-transmission
Co-Transmission Function(Co-Cabinet Scenario/Dual-Mode Scenario)
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The co-transmission is used in the following scenarios: Scenario 1: Transmission Resource Sharing of the UMTS System with the GSM
System. Scenario 2: Transmission Resource Sharing of the GSM System with the UMTS
System.
Scenario 1 Scenario 2
Co-Transmission Function(Co-Cabinet Scenario/Dual-Mode Scenario)
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Transmission Resource Sharing of the UMTS System with the
GSM System Cable Connections: Connect one pair of E1 wires on the WMPT to the
RNC,
and then connect another pair (or other pairs) of E1 wires to the BSC.E1 cable
connected to RNC
Co-Transmission Function(Co-Cabinet Scenario/Dual-Mode Scenario)
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Transmission Resource Sharing of the GSM System with the UMTS
System Cable Connections: Connect one pair of E1 wires on the GTMU to the BSC,
and then connect another pair (or other pairs) of E1 wires to the RNC.E1 cable
connected to BSC
Co-Transmission Function(Co-Cabinet Scenario/Dual-Mode Scenario)
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Notes The service of one E1 cable on the panel can be transferred to only one
E1 cable on the backplane through the TDM timeslot cross but not several
E1 cables on the backplane. The switch between one E1 cable on the panel and one E1 cable on the
backplane doesn’t support timeslot cross. That means the timeslot on the
panel E1 cable must be switch to the same timeslot on the backplane E1 0 E1 that carries OML must be connected to BSC in current GSM version.
So it cannot realized all transmission resource sharing of the UMTS
system with the GSM system. The E1 cable is unification numbered on both panel and backplane of
GTMU. The E1 number on the panel is 0-3 and on the backplane is 16-19.
Co-Transmission Function(Co-Cabinet Scenario/Dual-Mode Scenario)
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Section 1 MRRU/MRFU Supports Three Working Mode
Section 2 Interconnection of CPRI Port
Section 3 Co-Transmission Function
Section 4 Co-Monitoring System
Section 5 Support Configuration of XRRU/XRFU
Section 6 Function of Sharing the Clock Source
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Co-Monitoring system (Co-Cabinet Scenario/Dual-Mode Scenario) Function
The monitoring system such as PMU, EMU belongs to public monitoring
resource which can be shared in two working mode. The dual-mode base
station supports to configuration and maintenance the public monitoring
resource in two working mode. Equipment management module (or called monitoring software) manages public
parts, data configuration of GSM and UMTS and reports alarm information of
public parts according to a preconcerted rule.
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Notes For the public monitoring system can be configured by two working mode, the
data configuration must be consistent. Otherwise it will generate configuration
conflict alarm. It suggest set a set of uniform default value according to the practice of dual-
mode site.
Co-Monitoring system (Co-Cabinet Scenario/Dual-Mode Scenario)
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Section 1 MRRU/MRFU Supports Three Working Mode
Section 2 Interconnection of CPRI Port
Section 3 Co-Transmission Function
Section 4 Co-Monitoring System
Section 5 Support Configuration of XRRU/XRFU
Section 6 Function of Sharing the Clock Source
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Support Configuration of XRRU/XRFU (The Dual-Mode Scenario) The configuration principle of XRRU/XRFU
XRRU/XRFU used in hybrid network of different working modes which are
share one CPRI port is used to identify RXU board works in another working
mode . For example
SRRU/WRFU works in UMTS Only mode should be configured as XRRU/XRFU in
GSM side.
DRRU/DRFU works in GSM Only mode should be configured as XRRU/XRFU in
UMTS side.
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DRRU
MRRU
GMPT
SRRU
WBBP WMPT
Example
Physical connection
Support Configuration of XRRU/XRFU (The Dual-Mode Scenario)
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DRRU
MRRU
GMPT
XRRU
WBBP WMPT
Configuration in GSM side
XRRU
MRRU
GMPT
SRRU
WBBP WMPT
Example
Configuration in UMTS side
Support Configuration of XRRU/XRFU (The Dual-Mode Scenario)
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Section 1 MRRU/MRFU Supports Three Working Mode
Section 2 Interconnection of CPRI Port
Section 3 Co-Transmission Function
Section 4 Co-Monitoring System
Section 5 Support Configuration of XRRU/XRFU
Section 6 Function of Sharing the Clock Source
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Function of sharing the Clock Source(Co-Cabinet Scenario/Dual-Mode Scenario)
The GSM&UMTS base station supports the clock source sharing
function. Currently, only the E1 clock source of the GSM system can
be shared with the UMTS system.
On the UMTS side, run the SET CLKMODE command, and then set
Clock Source Type to PEER.
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