bsc6900 configuration principle(global)(v900r016c00_05)(pdf)-en
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SRAN9.0&GBSS16.0&RAN16.0 BSC6900
Configuration Principles (Global)
Issue 05
Date 2014-10-29
HUAWEI TECHNOLOGIES CO., LTD.
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Copyright © Huawei Technologies Co., Ltd. 2014. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the
customer. All or part of the products, services and features described in this document may not be within the
purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,
and recommendations in this document are provided "AS IS" without warranties, guarantees or representations
of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website: http://www.huawei.com
Email: [email protected]
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Contents
1 Change History..............................................................................................................................1
2 Introduction....................................................................................................................................6
2.1 Overview........................................................................................................................................................................6
2.2 Version Difference.........................................................................................................................................................62.2.1 BSC6900 GSM............................................................................................................................................................6
2.2.2 BSC6900 UMTS..........................................................................................................................................................7
2.2.3 BSC6900 GU...............................................................................................................................................................7
2.3 Laws and Regulations.....................................................................................................................................................7
2.3.1 Cyber Security Requirements......................................................................................................................................7
2.3.2 Export Control.............................................................................................................................................................7
3 Application Overview..................................................................................................................9
4 Product Configurations..............................................................................................................13
4.1 BSC6900 GSM Product Configurations.......................................................................................................................13
4.1.1 Hardwar e Capacity License.......................................................................................................................................14
4.1.2 Service Processing Units...........................................................................................................................................14
4.1.3 Interface Boards.........................................................................................................................................................22
4.1.4 Clock Boards.............................................................................................................................................................28
4.1.5 General Principles for Board Configuration..............................................................................................................28
4.1.6 Subracks.....................................................................................................................................................................29
4.1.7 Cabinets.....................................................................................................................................................................31
4.1.8 Auxiliary Materials....................................................................................................................................................31
4.1.9 Example of Typical BSC6900 GSM Configuration..................................................................................................32
4.1.10 BSC6900 GSM Recommended Capacity for Delivery...........................................................................................35
4.2 BSC6900 UMTS Product Configurations....................................................................................................................35
4.2.1 Impact of Traffic Model on Configurations..............................................................................................................36
4.2.2 Hardwar e Capacity License.......................................................................................................................................38
4.2.3 Service Processing Units...........................................................................................................................................40
4.2.4 Interface Boards.........................................................................................................................................................46
4.2.5 Clock Boards.............................................................................................................................................................54
4.2.6 Principles for Board Configurations..........................................................................................................................54
4.2.7 Subracks.....................................................................................................................................................................55
Configuration Principles (Global) Contents
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4.2.8 Cabinets.....................................................................................................................................................................57
4.2.9 Auxiliary Materials....................................................................................................................................................57
4.2.10 Restrictions on Inter-Subrack Switching.................................................................................................................58
4.2.11 Example of Typical BSC6900 UMTS Configuration.............................................................................................59
4.2.12 BSC6900 UMTS Recommended Capacity for Delivery.........................................................................................66
4.3 BSC6900 GU Product Configurations.........................................................................................................................66
5 Expansion and Upgrade Configurations.................................................................................68
5.1 BSC6900 GSM Hardware Expansion and Upgrade Configurations............................................................................68
5.1.1 Hardware Expansion and Upgrade Configurations...................................................................................................68
5.1.2 Hardwar e Capacity License Expansion.....................................................................................................................85
5.1.3 Examples of Hardware Expansion............................................................................................................................85
5.2 BSC6900 UMTS Hardware Expansion and Upgrade Configurations.........................................................................88
5.2.1 Hardware Expansion and Upgrade Configurations...................................................................................................885.2.2 Hardware Capacity License Expansion.....................................................................................................................89
5.2.3 Examples of Hardware Expansion............................................................................................................................89
5.2.4 Examples of Hardware Capacity License Expansion................................................................................................90
5.3 BSC6900 GU Hardware Expansion and Upgrade Configurations...............................................................................91
6 Spare Parts Configuration..........................................................................................................93
6.1 BOM of S pare Parts......................................................................................................................................................93
6.2 Configuration Principles for Spare Parts......................................................................................................................93
6.2.1 Poisson Algorithm.....................................................................................................................................................93
6.2.2 Percentage Algorithm................................................................................................................................................94
6.2.3 Notes..........................................................................................................................................................................94
7 Appendix.......................................................................................................................................95
7.1 Hardware Version.........................................................................................................................................................95
7.2 GSM Configuration Reference.....................................................................................................................................96
7.2.1 GSM Tr affic Model...................................................................................................................................................96
7.2.2 GSM Board Specifications......................................................................................................................................100
7.2.3 GSM Board Usage Efficiency.................................................................................................................................104
7.2.4 Ater RSL Configuration Calculation Tool..............................................................................................................104
7.2.5 Suggestions for Lb Interface Configuration............................................................................................................105
7.3 UMTS Configuration Reference................................................................................................................................105
7.3.1 UMTS Traffic Model...............................................................................................................................................105
7.3.2 UMTS Hardware Specifications..............................................................................................................................109
8 Acronyms and Abbreviations.................................................................................................114
Configuration Principles (Global) Contents
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1 Change HistoryThis chapter describes changes in different document versions.
05 (2014-10-29)
This issue incorporates the following changes.
ChangeType
Change Description
Editorial
change
Added None.
Modified l Added descriptions about new boards SPUc, GOUe, GCGb,
and GCUb and stated that the new boards and their
corresponding old boards can coexist and be inserted intoeach other's slots in 2.2 Version Difference.
l Updated the rules for calculating the number NIU boards
required by PRS KQI related features in 4.2.3 Service
Processing Units.
l Updated the method of calculating the number of DPUe
boards (N+1 redundancy recommended) in 4.2.3 Service
Processing Units.
l Added WB-AMR specifications of interface boards in 4.2.4
Interface Boards.
Deleted None.
04 (2014-09-10)
This issue incorporates the following changes.
ChangeType
Change Description
Editorial
change
Added None.
Configuration Principles (Global) 1 Change History
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ChangeType
Change Description
Modified l Added the description that SPUb and SPUc boards, GOUc
and GOUe boards, and clock boards can be placed in a pair of active and standby slots. For details, see 2.2.2 BSC6900
UMTS.
l Added low voltage differential signal (LVDS) restrictions
imposed on the POUc calculation to 4.1.3 Interface
Boards.
l Added SPUb, NIUa, and SAUc boards as examples of
evenly configured boards. For details, see 4.2.10
Restrictions on Inter-Subrack Switching.
l Added basic configuration principles. For details, see 5.3
BSC6900 GU Hardware Expansion and Upgrade
Configurations.
Deleted None.
03 (2014-06-30)
This issue incorporates the following changes.
Change Type Change Description
Editorialchange
Added None.
Modified l Modified the method of calculating the number of DPUf
boards. For details, see 4.1.2 Service Processing
Unitsand5.1.1 Hardware Expansion and Upgrade
Configurations.
l Added restrictions imposed on interface boards in Abis over
TDM networking mode. For details, see 4.1.3 Interface
Boards.
Deleted None.
02 (2014-05-31)
This issue incorporates the following changes.
Change Type Change Description
Editorial
change
Added None.
Configuration Principles (Global) 1 Change History
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Change Type Change Description
Modified l Added the impacts of key quality indicator (KQI) features
on DPUe and NIUa boards. For details, see 4.2.3 Service
Processing Units.l Optimized descriptions throughout the document.
Deleted None.
01 (2014-04-29)
This issue incorporates the following changes.
Change Type Change Description
Editorial
change
Added None.
Modified Converted some descriptions to tables. For details, see 4.2.7
Subracks.
Deleted None.
Draft C (2014-04-21)
This issue incorporates the following changes.
Change Type Change Description
Editorial
change
Added 2.3 Laws and Regulations
Modified l Modified the method of calculating the number of SPUc
boards. For details, see 4.2.11 Example of Typical
BSC6900 UMTS Configuration.
l Modified some descriptions. For details, see 5.1.1
Hardware Expansion and Upgrade Configurations.
l Added the capacity in different transmission modes. For
details, see 7.2.1 GSM Traffic Model.
Deleted None.
Draft B (2014-02-28)
This issue incorporates the following changes.
Configuration Principles (Global) 1 Change History
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ChangeType
Change Description
Editorial
change
Added None.
Modified l Added descriptions about board replacement. For details,
see 2.2.2 BSC6900 UMTS.
l Optimized the document organization. For details, see 4.1.9
Example of Typical BSC6900 GSM
Configurationand4.2.11 Example of Typical BSC6900
UMTS Configuration.
l Modified some descriptions. For details, see 4.2.1 Impact
of Traffic Model on Configurations,4.2.2 Hardware
Capacity License,4.2.3 Service Processing Units,4.2.4
Interface Boards, and7.3.2 UMTS Hardware
Specifications.
l Modified the configuration principles for SAU boards. For
details, see 4.2.6 Principles for Board Configurations.
l Canceled the restrictions imposed on MPU-related
configurations. For details, see 4.2.10 Restrictions on
Inter-Subrack Switching.
Deleted Laws and Regulations.
Draft A (2014-01-27)
Compared with Issue 02 (2013-06-16) of V900R015C00, this issue incorporates the following
changes.
ChangeType
Change Description
Editorial
change
Added l 2.3 Laws and Regulations
l 6 Spare Parts Configuration
l 7.2.4 Ater RSL Configuration Calculation Tool
l 7.3.2 UMTS Hardware Specifications
Modified l Modified the configuration principles for XPUc processing
units and modified the XPUb board specifications for
eGBTSs. For details, see 4.1.2 Service Processing Units.
l Added information about power consumption. For details,
see 4.1.7 Cabinetsand4.2.8 Cabinets.
l Added GOUe and XPUc board specifications. For details,
see 4.1.3 Interface Boards.
l Added GOUe board specifications. For details, see 4.2.4
Interface Boards.
Configuration Principles (Global) 1 Change History
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ChangeType
Change Description
Deleted None.
Configuration Principles (Global) 1 Change History
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2 Introduction
2.1 Overview
This document describes the configuration principles of the BSC6900 V900R016C00.
The BSC6900 can be configured as a BSC6900 GSM, BSC6900 UMTS, or BSC6900 GSM
+UMTS (GU) to adapt to various application scenarios.
l A BSC6900 GSM works in GSM Only (GO) mode and functions as a GSM BSC.
l A BSC6900 UMTS works in UMTS Only (UO) mode and functions as a UMTS RNC.
l A BSC6900 GU works in GSM&UMTS (GU) mode and functions as a GSM BSC and
UMTS RNC.
This document covers topics, such as product specifications, configuration principles, and
capacity expansion and upgrade configurations of the BSC6900 GSM, BSC6900 UMTS, and
BSC6900 GU.
2.2 Version Difference
2.2.1 BSC6900 GSM
The BSC6900 GSM in the minimum configuration consists of one cabinet, in which one subrack,the main processing subrack (MPS), is configured. The BSC6900 GSM in the maximum
configuration consists of two cabinets, in which one MPS and three extended processing
subracks (EPSs) are configured. The BSC6900 V900R016GSM supports five hardware
versions: HW60 R8, HW69 R11, HW69 R13, HW69 R15, HW69 R16.
A BSC6000 or BSC6900 GSM can be upgraded to BSC6900 V900R016 by upgrading software.
When HW60 R8 or HW69 R11 hardware is used, software must be upgraded version by version.
Configuration principles and capacity expansion principles remain unchanged after the upgrade.
If only the software of a BSC6000 or BSC6900 GSM is upgraded to GBSS16.0, capacity remains
unchanged after the upgrade.
This document describes the configuration principles of the BSC6900 GSM using HW69 R16
hardware.
Configuration Principles (Global) 2 Introduction
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2.2.2 BSC6900 UMTS
The BSC6900 UMTS in the minimum configuration consists of one cabinet, in which one
subrack (MPS) is configured. The BSC6900 UMTS in the maximum configuration consists of
two cabinets, in which one MPS and five EPSs are configured. The BSC6900V900R016C00UMTS supports five hardware versions: HW68 R11, HW69 R11, HW69 R13,
HW69 R15, HW69 R16.
A BSC6810 or BSC6900 UMTS can be upgraded to a BSC6900 V900R016C00by upgrading
software. When HW60 R8 or HW69 R11 hardware is used, software must be upgraded version
by version. Configuration principles and capacity expansion principles remain unchanged after
the upgrade. If only the software is upgraded toRAN16.0 capacity remains unchanged after the
upgrade.
HW69 R16 introduces new boards SPUc, GOUe, GCUb, and GCGb, which can coexist with
the corresponding old boards SPUb, GOUc, GCUa, and GCGa. The new and old boards have
the same capabilities and specifications. An old board and its corresponding new board (for example, SPUb and SPUc, GOUc and GOUe, GCGa and GCGb, and GCUa and GCUb) can
work in active/standby mode.
BSC6900 V900R016C00 has the same basic specifications as BSC6900 V900R015C00.
BSC6900 UMTS supports the RNC in Pool feature to pool BSC6900s and BSC6910s. RNCs in
a resource pool share resources and back up for each other.
This document describes the configuration principles of the BSC6900 UMTS using HW69
R16 hardware.
2.2.3 BSC6900 GU
The BSC6900 GU in the minimum configuration consists of one cabinet, in which two subracks
are configured: one subrack is used for UMTS and the other for GSM. The BSC6900 GU in the
maximum configuration consists of two cabinets, in which one MPS and five EPSs are
configured. The BSC6900 V900R016 GU supports the following hardware versions: HW60 R8/
HW68 R11, HW69 R11, HW69 R13, HW69 R15, HW69 R16.
A BSC6000, BSC6810, or BSC6900 GU can be upgraded to BSC6900 V900R016C00 by
upgrading software. When HW60 R8, HW68 R11, or HW69 R11 hardware is used, is used,
software must be upgraded version by version. Configuration principles and capacity expansion
principles remain unchanged after the upgrade. If only the software version is upgraded to
SRAN9.0, capacity remains unchanged after the upgrade.
2.3 Laws and Regulations
2.3.1 Cyber Security Requirements
The BSC6900 meets A1, A2, and B security requirements and newly-added features are not
security-sensitive.
2.3.2 Export Control
The BSC6900 contains an embargoed item, which is listed in the following table.
Configuration Principles (Global) 2 Introduction
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Item Description ECCN ControlReason
Measure Remarks
05330231 System Application
Software, LightApplication Data
Management Software
Package(5.5 S), 1 Year
Standard Product
Services
5D002 Laws and
regulations(upon
vendor's
requirements)
Do not sell the
MySQLdatabase in
class-A
countries.
N/A
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3 Application OverviewThe hardware platform of the BSC6900 is characterized by high integration, high performance,
and a modular structure to adapt to different scenarios and provide operators with a high-quality
network at a low cost. In addition, the network is easy to expand and maintain. Figure 3-1 shows
a single BSC6900 cabinet.
Figure 3-1 BSC6900 N68E-22 cabinet
Figure 3-2 shows the configuration of a BSC6900 cabinet.
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Figure 3-2 Configuration of a BSC6900 cabinet (front view and rear view)
Table 3-1 describes the BSC6900 specifications.
Table 3-1 BSC6900 specifications
Performance
Specifications
BSC6900
GSM
l Maximum number of cabinets: 2
l Maximum number of subracks: 4
l Maximum GSM specifications (all-TDM transmission):
4096 TRXs, 24,000 Erlang, 5,900,000 BHCA, 16,384
activated PDCHs, and 1536 Mbit/s bandwidth on the Gb
interface
l Maximum GSM specifications (all-IP transmission for GSM): 8192 TRXs, 45,000 Erlang, 11,000,000 BHCA,
32,768 activated PDCHs, and 3072 Mbit/s bandwidth
over the Gb interface
BSC6900
UMTS
l Maximum number of cabinets: 2
l Maximum number of subracks: 6
The maximum specifications are 3060 NodeBs, 5100
cells, 5,300,000 BHCA (7,000,000 BHCA including
SMS), and 40 Gbit/s or 167,500 Erlang.
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BSC6900
GU
l Maximum GSM specifications (all-TDM transmission for
GSM): 4096 TRXs, 24,000 Erlang, 5,900,000 BHCA,
16,384 activated PDCHs, and 1536 Mbit/s bandwidth
over the Gb interface
When the maximum GSM specifications are reached, theUMTS processing capabilities of the BSC6900
V900R017 are 1440 NodeBs, 2400 cells, 1,675,000
BHCA, and 12.8 Gbit/s or 53,600 Erlang.
The preceding specifications are provided by full
configuration of GSM boards in four subracks and UMTS
boards in two subracks.
l Maximum GSM specifications (all-IP transmission for
GSM): 8192 TRXs, 45,000 Erlang, 11,000,000 BHCA,
32,768 activated PDCHs, and 3072 Mbit/s bandwidth
over the Gb interface
When the maximum GSM specifications are reached, theUMTS processing capabilities of the BSC6900
V900R017 are 1440 NodeBs, 2400 cells, 1,675,000
BHCA, and 12.8 Gbit/s or 53,600 Erlang.
The preceding specifications are provided by full
configuration of GSM boards in four subracks and UMTS
boards in two subracks.
l Maximum UMTS specifications: 3060 NodeBs, 5100
cells, 4,430,000 BHCA, and 33.6 Gbit/s or 140,700
Erlang.
When the maximum UMTS specifications are reached,
the GSM processing capabilities of the BSC6900
V900R017 are 1536 TRXs, 9750 Erlang, 6144 PDCHs,
576 Mbit/s over the Gb interface, and 2,625,000 BHCA
in all-TDM transmission mode, and 3584 TRXs, 22,750
Erlang, 14,336 PDCHs, 1344 Mbit/s over the Gb
interface, and 6,125,000 BHCA in all-IP transmission
mode.
The preceding specifications are provided by full
configuration of UMTS boards in five subracks and GSM
boards in one subrack.
StructuralSpecifications
Dimensions of the BSC6900 N68E-22 cabinet (H x W x D): 2200 mm x600 mm x 800 mm (86.61 in. x 23.62 in. x 31.50 in.)
Single cabinet weight≤ 320 kg (705.6 lb); load-bearing capability of the
floor≥ 450 kg/m2 (0.64 bf/in.2)
Power Supply
Specifications
–48 V DC
Input voltage range: –40 V to –57 V
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NOTE
l BSC6900 specifications are not equal to the sum of board specifications.
l BSC6900 specifications are designed based on customers' requirements and the product plan. During
product specification design, business factors and technical factors, such as system load and board
quantity limitations, are taken into consideration to define an equivalent system specification.
l Specifications vary with different versions.
l The definition of BHCA in GSM is different from that in UMTS. The BHCA defined in UMTS is the
number of call attempts and the BHCA capability varies with the traffic model.
l The BHCA defined in GSM is the maximum number of equivalent BHCAs under the Huawei traffic
model. All user activities, including CS location updates, CS handovers, PS TBF setups, PS temporary
block flow (TBF) releases, and PS pagings, can be converted into equivalent BHCAs. This better
reflects the impact of the traffic model change on system performance. In full configuration, when the
BHCA reaches the maximum, the system reaches the designed maximum processing capability if the
average CPU usage does not exceed 75% of the average flow control threshold.
l In GSM, if 5,900,000 (or 11,000,000) equivalent BHCA defined in GSM are converted from only CS
services in the Huawei default CS traffic model, the corresponding BHCA for calls only is 1,440,000
(or 2,680,000) in the industry traffic model. If the equivalent BHCA are converted from both CS andPS services in Huawei default PS traffic model, the corresponding BHCA for only calls is 1,000,000
(or 2,120,000) in the industry traffic model.
l The UMTS BHCA is based on the balanced traffic model, and the UMTS PS throughput is based on
the high-PS traffic model. For details about the definitions of the traffic models, see section7.3.1 UMTS
Traffic Model.
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4 Product Configurations
4.1 BSC6900 GSM Product Configurations
A BSC6900 GSM consists of hardware and hardware capacity licenses. The hardware includes
cabinets, subracks, data processing units, signaling processing units, network intelligence units,
service aware units, interface boards, and clock boards. The hardware capacity licenses includes
the Network Intelligence Throughput license, Mega BSC license, and BBU Carrier Capacity
license.
Table 4-1 lists the mapping between hardware versions and GBSS versions.
Table 4-1 Mapping between hardware versions and GBSS versions
Hardwa
re
Version
BSC6000 BSC6900
GBSS6.1/
GBSS7.0/
GBSS8.0/
GBSS8.1
GBSS9.
0
GBSS1
2.0
GBSS1
3.0
GBSS1
4.0
GBSS15
.0
GBSS1
6.0
HW60
R8
Supported Support
ed
Support
ed
Support
ed
Support
ed
Supporte
d
Support
ed
HW69
R11
- Support
ed
Support
ed
Support
ed
Support
ed
Supporte
d
Support
ed
HW69
R13
- - - Support
ed
Support
ed
Supporte
d
Support
ed
HW69
R15
- - - - - Supporte
d
Support
ed
HW69
R16
- - - - - - Support
ed
Note that if two boards work in active/standby mode, the two boards must be identical.
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To replace a single-core board with a multi-core board, you must configure data related to board
removal and addition before replacing the board. Do not directly remove the single-core board
and then insert the multi-core board into the slot.
The following BSC6900 UMTS boards can also be used in BSC6900 GSM mode (these GSM
boards cannot be used in UMTS mode):
l UMTS SPUb board with the same capacity as GSM XPUb/XPUc board
l UMTS SPUc board with the same capacity as GSM XPUb/XPUc board
l UMTS DPUe board with the same capacity as GSM DPUg board
l UMTS DPUb board with the same capacity as GSM DPUc or DPUd board
NOTICE
For two boards to work in active/standby mode, the two boards must be identical. To replace a
single-core board in a slot with a multi-core board, you must first remove the single-core board
from the slot and then insert the multi-core board into the slot.
Section 4.1.1 Hardware Capacity Licensedescribes the configuration principles of hardware
capacity licenses. Sections4.1.2 Service Processing Unitsthrough4.1.8 Auxiliary Materials
cover the configuration principles of the BSC6900 GSM hardware and relevant restrictions.
4.1.1 Hardware Capacity License
No new licenses are provided by the BSC6900 V900R016C00 GSM.
4.1.2 Service Processing Units
Table 4-2 lists service processing unites in GBSS17.0.
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Table 4-2 Service processing units
Model Board Name Description
Specifications
Remarks
WP1D000DPU05
DPUf CS DataProcessing
Unit
(1920CIC/
3840 IWF
(TDM&IP)/
7680IWF
(IP&IP))
Provides CSservice
processing
(including
the TC
function and
IWF
function)
and works in
N+1 backup
mode
TC function:1920 CICs (A
over TDM)
IWF function:
3840 channels
(Abis over IP
and Ater over
TDM, or Abis
over TDM and
A over IP)
7680 CICs
(Abis over IPand A over IP)
For the TCfunction, the
specifications of
WP1D000DPU05
are 1920 CICs
when non-
wideband AMR
coding schemes
are used. When
wideband AMR
coding schemes
are used, the
specifications of
WP1D000DPU05
are 50% of 1920
CICs (960 CICs),
equivalent to 2
times of a common
call.
For the IWF
function, the
specifications of
the DPUf are
unchanged
regardless of
whether non-
wideband or
wideband AMR
coding schemes
are used. This is
because TC
coding is not
involved in the
IWF function.
WP1D00
0DPU06
DPUg PS Data
Processing
Unit (1024
PDCH)
Provides PS
service
processing
and works in
N+1 backup
mode
1024 activated
PDCHs
110 PDCHs per
DSP
The specifications
remain unchanged
regardless of the
coding schemes
(CS1 to CS4,
MCS1 to MCS9,
and EDGE+).
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Model Board Name Description
Specifications
Remarks
WP1D00
0DPU03
DPUe PS Data
ProcessingUnit (1024
PDCH)
Provides PS
service processing
and works in
N+1 backup
mode
1024 activated
PDCHs110 PDCHs per
DSP
The specifications
remain unchangedregardless of the
coding schemes
(CS1 to CS4,
MCS1 to MCS9,
and EDGE+).
WP1D00
0NIU00
NIUa Network
Intelligence
Unit
Provides
intelligent
service
awareness
PS throughput:
50 Mbit/s
A maximum of
3200 Mbit/s is
supported. If the
Gb throughput is
higher than 50
Mbit/s, network intelligence
throughput
licenses must be
purchased.
QM1SNI
U50M00
Network
Intelligence
Throughput
License
Provides
intelligent
service
awareness
PS throughput:
50 Mbit/s
One NIUa
provides 50 Mbit/s
PS throughput.
WP1D00
0XPU03
XPUc Extended
ProcessingUnit (640)
Provides
signaling processing
and works in
active/
standby
mode
l GBTS:
640 TRXs
3900 Erlangs
1,050,000
BHCA
l eGBTS:
640 TRXs
3900 Erlangs
950,000 BHCA
The BHCA is
based on Huaweidefault traffic
model.
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Model Board Name Description
Specifications
Remarks
WP1D00
0XPU03
XPUc
(XPUI)
GSM
ExtensibleProcessing
Unit for
Computation
Service
Provides the
IBCAfunction and
works in
independent
mode
None Calculated based
on IBCArequirements at
network
deployment.
Generally, two
WP1D000XPU03
s are configured by
default. (A
maximum of eight
WP1D000XPU03
s can be
configured based
on the network
requirements.)
WP1D00
0SPU03
SPUc
(NASP
)
Network
Assisted
Service
Process
Provides a
service
processing
unit to assist
the network
10 AC The number of
QM1M000SPU00
is calculated based
on GBFD-511609
Intelligent Wi-Fi
Detection and
Selection
requirements at
network
deployment. One
QM1M000SPU00
is configured in
each BSC by
default.
NOTE
IWF: The interworking function (IWF) implements transmission format conversion. When Abis over IP
and Ater over TDM, or A over IP are used, the IWF performs format conversion between TDM and IP or between IP and IP.
By default, the following boards are delivered: DPUf, DPUg, NIUa, XPUc, and SPUc (NASP).
The following table describes the network requirements during the configuration of
WP1D000DPU05 (DPUf).
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Item Description Remarks
Networking mode on the
A interface
APortType
Board
configurations are
affected by A over IP transmission and
BM/TC separated
mode
In A over IP mode, the TC function is
implemented by the CN. Therefore, the
BSC provides the IWF function, not theTC function.
In BM/TC separated mode, DPUf in the
TC subrack provides the TC function.
Whether the BM subrack provides the
IWF function depends on the
transmission mode. The BM subrack
needs to provide the IWF function only
when TDM transmission is used on the
Ater interface and IP transmission is used
on the Abis interface.
In BM/TC combined mode, the DPU board provides both the TC and IWF
functions. Therefore, no extra board is
required to implement the IWF function.
MaxACICPerBSC,
WbAMRRate
Number of CICs on
the A interface (non-
wideband AMR
coding scheme):
includes the FR, HR,
and all types of
AMR coding
schemes
Calculated based on the actual number of
calls in the network
MaxACICPerBSC, (1 –
WbAMRRate)
Number of CICs on
the A interface
(wideband AMR
coding scheme):
includes all types of
wideband AMR
coding schemes
Calculated based on the actual number of
calls in the network
MaxACICPerBSCTDM Number of CICs on
the A interface when
TDM transmissionis used on the A
interface in BM/TC
combined or BM/
TC separated mode
Calculated based on the actual number of
calls in the network
MaxACICPerBSCIP Number of CICs on
the A interface in A
over IP mode
Calculated based on the actual number of
calls in the network
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Item Description Remarks
MaxIWFPerBSCTDMIP Number of CICs in
Abis over IP and
Ater over TDM or inAbis over TDM and
A over IP
Calculated based on the network
structure and the traffic model.
MaxIWFPerBSCIPIP Number of CICs in
A over IP and Abis
over IP
Calculated based on the network
structure and the traffic model.
Configuration principles for the WP1D000DPU05 (DPUf):
The number of WP1D000DPU05s to be configured depends on the number of required CICs.WP1D000DPU05s can work in N+1 backup mode. Depending on the mode in use, there are 4
different ways to calculate the number of DPUf boards to be configured:
l In BM/TC separated mode (or TDM/IP hybrid transmission in A over IP)
On the BM side:
The number of DPUf to be configured depends on the number of CICs that require IWF
conversion between TDM and IP and between IP and IP.
Number of DPUf = Roundup (MAXIWFPerBSCTDMIP/3840 + Max
(MAXIWFPerBSCIPIP - MAXIWFPerBSCTDMIP, 0)/7680,0) + 1
On the TC side:
Number of DPUf = Roundup (MaxACICPerBSCTDM/1920) + 1
l In BM/TC combined mode (or TDM/IP hybrid transmission in A over IP)
The DPUf providing the TC function can support the IWF function of the same
specifications as TC.
Extra DPUf should be configured to provide the IWF function for the A-interface CIC
circuits in A over IP transmission.
Number of DPUf = Roundup (MaxACICPerBSCTDM/1920,0) + Roundup
(MAXIWFPerBSCTDMIP/3840 + Max (MAXIWFPerBSCIPIP -
MAXIWFPerBSCTDMIP, 0)/7680,0) + 1
l A over IP
The number of DPUf to be configured depends on the number of CIC circuits that require
IWF conversion between TDM and IP and between IP and IP.
Number of DPUf = Roundup(MAXIWFPerBSCTDMIP/3840 + Max
(MAXIWFPerBSCIPIP - MAXIWFPerBSCTDMIP, 0)/7680,0) + 1
l All IP
Number of DPUf = Roundup (MaxACICPerBSCIP/7680,0) + 1
Configuration principles for the WP1D000DPU06 (DPUg):
The following table describes the network requirements during the configuration of
WP1D000DPU06 (DPUg).
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Item Description Remarks
MaxActivePDCH-
PerBSC
Maximum number of activated
PDCHs
Calculated based on the number
of users and the traffic model.
If the PS function is configured, the number of DPUg to be configured depends on the number
of activated PDCHs that are configured. DPUg can work in N+1 backup mode.
Number of DPUg = Roundup (MaxActivePDCHPerBSC/1024, 0) + 1
NOTICE
The number of PDCHs activated on each DSP of the DPUg cannot exceed 110.
Configuration principles for the WP1D000NIU00 (NIUa) and the QM1SNIU50M00 (Network
Intelligence Throughput License):
The following table describes the network requirements that should be considered during the
configuration of WP1D000NIU00 (NIUa) and QM1SNIU50M00.
Item Description Remarks
Gb throughput Throughput on the Gb interface Calculated based on the number
of users and the traffic model.
If intelligent service identification is required to improve efficiency of instant messaging (IM)
services, web browsing services, email services, streaming services, and P2P services, NIUa
must be configured. One NIUa board is always configured on a network.
Number of NIUa required in a network = 1
One NIUa provides 50 Mbit/s throughput processing capability. If Gb throughput is higher than
50 Mbit/s, you must apply for the Network Intelligence Throughput License and ensure that:
N_QM1SNIU50M00 = Roundup [(Gb throughput – 50)/50, 0].
Otherwise,
N_QM1SNIU50M00 = 0
The following table describes the network requirements during the configuration of XPUc.
Item Description Remarks
BHCA requirement BHCA that need to be supported
in the network
Calculated based on the number
of users and the traffic model.
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Item Description Remarks
TRX Number Total number of TRXs Determined based on the
network plan
ERL Number CS traffic volume (Erlang) that
needs to be supported in the
network
Determined based on the
network plan
The number of XPUc boards to be configured depends on the total number of TRXs, BHCA
requirement, and CS traffic volume (Erlang) requirement. The number of XPUc boards to be
configured can be calculated as follows:
l If the BSC manages only GBTSs:
Number of (XPUc) = 2 x Roundup (max [TRX Number/640, BHCA requirement/1,050,000,
ERL Number/3900], 0)
l If the BSC manages only eGBTSs:
Number of (XPUc) = 2 x Roundup (max [TRX Number/640, BHCA requirement/950,000, ERL
Number/3900], 0)
l If the BSC manages both GBTSs and eGBTSs:
Number of (XPUc) = 2 x Roundup (max [TRX Number/640, BHCA requirement x GBTS TRX
Number/TRX Number/1,050,000 + BHCA requirement x eGBTS TRX Number/TRX Number/
950,000, ERL Number/3900], 0)
NOTICE
When the VAMOS feature is enabled, the traffic volume supported by a single TRX increases.
Based on the preceding formula, more XPUc boards are required.
The following table describes the network requirements during the configuration of XPUI.
Item Description Remarks
IBCA requirement Whether the network
requires the IBCA function
Calculated based on the number of
users and the traffic model.
A pair of XPUI boards are configured by default. A maximum of four pairs of XPUI boards can
be configured based on the network requirements.
If the IBCA function is required, an extra pair of XPUc boards must be configured to work as
XPUI.
The following table lists the network factors during the configuration of NASP.
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Item Description comment
NASP requirement Whether the network requires
the GBFD-511609 Intelligent
Wi-Fi Detection and Selectionfunction
One NASP board is configured
for each BSC.
If the GBFD-511609 Intelligent Wi-Fi Detection and Selection feature is required, you must
configure one extra SPUc to work as NASP.
4.1.3 Interface Boards
The BSC6900 provides diversified interfaces to meet the requirements of different networking
modes.
Table 4-3 lists the interface boards required by the BSC6900 GSM.
Table 4-3 Interface boards
Model Abbreviation
Name Where to Apply
WP1D000EIU
00
EIUb TDM Interface Unit (32 E1/T1) TDM transmission:
A/Ater/Abis/Lb
WP1D000OI
U01
OIUb TDM Interface Unit (1 STM-1,
Channelized)
TDM transmission:
A/Ater/Abis/Lb
WP1D000PO
U01
POUc TDM or IP Interface Unit (4 STM-1,
Channelized)
TDM/FR
transmission: A/Ater/
Abis/Lb/Gb
IP transmission: A/
Abis/Lb
WP1D000PE
U01
PEUc IP Interface Unit (32 E1/T1) FR or IP
transmission: A/
Abis/Lb/Gb
WP1D000FG201
FG2c IP Interface Unit (12 FE/4 GE,Electrical)
IP transmission: A/Abis/Lb/Gb/Iur-g
WP1D000GO
U03
GOUe IP Interface Unit (4 GE, Optical) IP transmission: A/
Abis/Lb/Gb/Iur-g
By default, the following boards are delivered: EIUb, OIUb, POUc, PEUc, FG2c, and GOUe.
Table 4-4 lists the specifications of interface boards on different interfaces.
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Table 4-4 Specifications of interface boards on different interfaces
Model Transmission Type
PortType
PortNo.
Number ofTRXs
Numberof CICcircuits
(64 kbit/ s) on theAInterface
Number ofCIC
circuits(16kbit/s)on theAterInterface
GbThroughput
(Mbit/s)
WP1D000
EIU00
(EIUb)
TDM TD
M E1
32 384 960 3840 N/A
WP1D000OIU00
(OIUb)
TDM TDM
CST
M-1
1 384 1920 7168 N/A
WP1D000
PEU00
(PEUc)
TDM TD
M
CST
M-1
32 N/A N/A N/A 64
IP IP E1 32 384 6144 N/A N/A
WP1D000POU01
(POUc)
TDM TDM
CST
M-1
4 512 7680 7168 504
IP IP
CST
M-1
4 2048 23,040 N/A N/A
WP1D000
FG201
(FG2c)
IP FE/
GE
elect
rical port
12/4 2048 23,040 N/A 1024
WP1D000
GOU03
(GOUe)
IP GE
optic
al
port
4 2048 23,040 N/A 1024
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NOTE
In Abis over TDM, the EIUb supports a maximum of 384TRXs, the OIUb supports a maximum of 384
TRXs, and the POUc supports a maximum of 512 TRXs when all of the following conditions are met:
l The EIUb/OIUb/POUc is configured to work in active/standby mode. If these boards work in
independent mode, the number of TRXs supported is halved. For details, see the RED parameter intheADD BRD command.
l Traffic model: The traffic volume is 5.86 Erlangs per TRX; three PDCHs are configured on each TRX
on average and the MCS-7 is used, or two PDCHs are configured on each TRX on average and the
MCS-9 is used.
l In fixed Abis networking, idle timeslots and monitoring timeslots are properly configured. Otherwise,
the number of TRXs supported by the EIUb/OIUb/POUc cannot reach the maximum specification.
l After the VAMOS feature is enabled, extra Abis bandwidth is required, which also affects the TRX
specifications of interface boards in GBSS17.0. GBSS16.0
The configuration principles of interface boards are as follows:
The total number of required interface boards is equal to the number of interface boards required
by each interface. Interface boards work in active/standby mode. In BM/TC separated mode, A
and Ater interface boards must be configured on the TC side, and Ater, Gb, and Abis interface
boards must be configured on the BM side. In other networking modes, A, Gb, and Abis interface
boards must be configured on the BM side.
1. Number of interface boards required by the Abis interface
Select the types of interface board based on the network plan. The number of required Abis
interface boards can be calculated based on either of the service capability (number of TRXs
supported) or number of required ports. Use the larger value of the two values to determine
the number of required Abis interface boards.
The following table describes the network requirements during the configuration of Abis
interface boards.
Item Sub_Item Description Remarks
AbisTRXNum
ber
TRXNoTDME
1
Number of TRXs in Abis over
TDM over E1 mode
Determined
based on the
network planTRXNoIPE1 Number of TRXs in Abis over IP
over E1 mode
TRXNoTDMS
TM1
Number of TRXs in Abis over
TDM over STM-1 mode
TRXNoIPSTM
1
Number of TRXs in Abis over IP
over STM-1 mode
AbisPortNum
ber
AbisTDME1N
o
Maximum number of TDM-
based E1 ports required by a BSC
on the Abis interface
Calculated
based on the
traffic model
AbisIPE1No Maximum number of IP-based
E1 ports required by a BSC on the
Abis interface
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Item Sub_Item Description Remarks
AbisTDMSTM
1No
Maximum number of TDM-
based STM-1 ports required by a
BSC on the Abis interface (oneSTM-1 is equivalent to 63 E1s)
AbisIPSTM1N
o
Maximum number of IP-based
STM-1 ports required by a BSC
on the Abis interface (one STM-1
is equivalent to 63 E1s)
To determine the number of Abis interface boards, you can use the following formula:
Number of Abis interface boards = 2 x Roundup (MAX(Number of TRXs in the current
transmission mode/Number of TRXs supported by the interface board, Number of ports in
the current transmission mode/Number of ports supported by the interface board), 0)
NOTE
l The number of Abis interface boards to be configured is determined by the number of TRXs and
the number of ports. If a base station uses TDM transmission over the Abis interface, the base
station requires one E1 port by default.
l If monitoring timeslots are requied by a base station for transmission optimization but the BSC
is not configured with any TDM over E1 interface boards, you must configure two pairs of EIUb
or EIUa boards.
If Abis over TDM is used, either of the following conditions must be met:
l Active/standby mode: Number of TRXs supported by the TDM interface board x(Average traffic volume per TRX + Average number of PDCHs per TRX x Number of
timeslots required for PS transmission) ≤ 7680
l Independent mode: Number of TRXs supported by the TDM interface board x (Average
traffic volume per TRX + Average number of PDCHs per TRX x Number of timeslots
required for PS transmission)≤ 4096
The following table lists the number of timeslots required for PS transmission.
Number of Timeslots Required for PSTransmission
Value
CS-1 1
CS-2 1
CS-3 2
CS-4 2
MCS-1 1
MCS-2 1
MCS-3 2
MCS-4 2
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Number of Timeslots Required for PSTransmission
Value
MCS-5 2
MCS-6 2
MCS-7 3
MCS-8 4
MCS-9 4
For example:
l
Assume that the POUc supports 512 TRXs, the average traffic volume per TRX is 5.86,the average number of PDCHs per TRX is 3, and the number of timeslots required for
PS transmission is 3 when MCS-7 is used. Then, the calculation result is 7608, which
is less than 7680.
l Assume that the POUc supports 512 TRXs, the average traffic volume per TRX is 5.86,
the average number of PDCHs per TRX is 4, and the number of timeslots required for
PS transmission is 4 when MCS-9 is used. Then, the calculation result is 11192, which
is greater than 7680. Therefore, the number of TRXs supported by the POUc must be
reduced to 351.
2. Number of interface boards required by the A interface
Select the types of interface board based on the network plan. The number of required A
interface boards can be calculated based on the service capability (number of CICs
supported).
The following table describes the network requirements during the configuration of A
interface boards.
Item Sub_Item Description Remarks
ACICNumber MaxACICPe
rBSCTDM
Maximum number of CICs
required by a BSC on the A
interface (TDM transmission)
Calculated based on
the traffic model
MaxACICPe
rBSCIP
Maximum number of CICs
required by a BSC on the A
interface (IP transmission)
To determine the number of A interface boards, you can use the following formula:
Number of A interface boards = 2 x Roundup (ACICNumber/Number of CICs supported
by an A interface board, 0
NOTE
If the A interface supports multiple transmission modes, you must calculate the number of interface
boards of each type.
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3. Number of interface boards required by the Ater interface
Select the types of interface board based on the network plan. The number of required Ater
interface boards can be calculated based on the service capability (number of CICs
supported).
The following table describes the network requirements during the configuration of Ater
interface boards.
Item Sub_Item Description Remarks
AterCICNum
ber
MaxAterCICPe
rBSC
Maximum number of CICs
required by a BSC on the
Ater interface
Calculated based on
the traffic model
To determine the number of Ater interface boards, you can use the following formula:
Number of Ater interface boards = 2 x Roundup (AterCICNumber/Number of CIC circuits
supported by an Ater interface board, 0)
NOTE
If the Ater interface supports multiple transmission modes, you must calculate the number of interface
boards of each type.
4. Number of interface boards required by the Gb interface
Select the types of interface board based on the network plan. The number of required Gb
interface boards can be calculated based on the service capability (bandwidth supported).
The following table describes the network requirements during the configuration of Gb interface
boards.
Item Sub_Item Description Remarks
GbThroughput GbFRTputPerBSC Overall traffic volume of a
BSC on the Gb interface in
FR transmission mode
Calculated based on
the traffic model
GbIPTputPerBSC Overall traffic volume of a
BSC on the Gb interface in
IP transmission mode
To determine the number of Gb interface boards, you can use the following formula:
Number of Gb interface boards = 2 x Roundup (Gb throughput/Bandwidth supported by a Gb
interface board, 0)
NOTE
If the Gb interface supports multiple transmission modes, you must configure the number of interface
boards of each type.
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4.1.4 Clock Boards
Table 4-5 Clock boards
Model Abbreviation
Name Function
WP1D000GCU02 GCUb General Clock Unit Provides general
clock signals
QW1D000GCG02 GCGb GPS&Clock Processing Unit Provides GPS clock
signals (including
the antenna system)
By default, both GCUb and GCGb are delivered.
The GCUb is optional. When a BSC6900 GSM does not use GPS clock signals, a pair of GCUb
boards can be configured for the BSC6900 GSM.
The GCGb is optional. When a BSC6900 GSM needs to use GPS clock signals, a pair of GCGb
boards can be configured for the BSC6900 GSM.
4.1.5 General Principles for Board Configuration
Service processing units, such as XPUs and DPUs, of a BSC6900 GSM work in resource pool
mode. Services (CS user plane, PS user plane, and signaling plane) of TRXs connected to
interface boards in a subrack are preferentially processed by service processing units in the same
subrack. If the resources required by a subrack exceed the specified threshold, load sharing is
implemented between subracks of the BSC. The purpose is to reduce resources used for inter-
subrack switching. The clock boards, switching boards, OMU, and SAU board are configured
in fixed slots. Other boards are configured according to the following principles:
l Interface boards and service processing units should be distributed as evenly as possible
among subracks. This reduces the consumption of processor resources and switching
resources by inter-subrack switching. Interface boards can be configured only in rear slots,
and service processing units can be configured in front or rear slots. It is recommended that
service processing units be configured in front slots.
Under a BSC, A interface boards, Ater interface boards, Abis interface boards, XPU, DPUf,
and DPUg must be distributed as evenly as possible among subracks. Configuring the sametype of board in the same subrack lowers system reliability.
l If POUc boards are used as A interface boards, DPUf should be configured in proportion
to the number of POUc boards in the same subrack. In full configuration, the ratio of the
number of POUc boards to the number of DPUf should be 1:4 in the same subrack, and the
maximum ratio should be 1:2. If traffic volume is light, a pair of POUc boards and one
DPUf must be configured in a subrack.
l No.7 signaling links must be configured on different A and Ater interface boards. This
reduces the impact of transmission faults and board faults on the system.
If there are multiple pairs of No.7 signaling links, distribute them evenly among interface
boards based on the quantities of A and Ater interface boards. In principle, the bandwidth
of the signaling links carried on a pair of single-core interface boards cannot exceed 2 Mbit/
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s, and the bandwidth of the signaling links carried on a pair of multi-core interface boards
cannot exceed 8 Mbit/s.
For stability purposes, at least two No.7 signaling links must be configured.
l The number of XPU boards used for signaling processing cannot exceed 20 pairs. The
number of XPUI boards used for implementing the IBCA function cannot exceed eight.
l It is recommended that one MPU be configured for each two pairs of XPU.
l General principles of network planning:
The basic principles for network planning and design do not vary with devices. The basic
principles include but are not limited to the following:
– Each location area (LA) can receive more than 120 paging requests per second over the
Um interface when a single CCCH is used for paging. Therefore, it is recommended
512 TRXs be configured for each LA in the case of a single CCCH. The TRX number
can be reduced with the increase in traffic volume.
–Consecutive PDCHs are configured so that MSs can use multiple consecutive timeslots.
– Other basic principles during GSM network planning.
1. General principles of board configuration:
l The TNUb boards are always installed in slots 4 and 5. The SCUb boards are always
installed in slots 6 and 7. The GCUb/GCGb boards are always installed in slots 12 and
13.
l The DPUe/DPUf/DPUg/NIUa boards can be installed in front or rear slots. It is
recommended that they be installed in front slots.
l The EIUb/PEUc/AEUa/OIUb/AOUc/UOIc/POUc/FG2c/GOUe boards are interface
boards. They can be installed only in rear slots.
2. The OMUc board is always configured in slots 24 and 25 of the MPS.
3. The clock processing boards are always configured in slots 12 and 13 of the MPS.
4. The SCUb boards are always configured in slots 6 and 7 of the MPS and EPS.
5. The SAUc board is always configured in the MPS. A maximum of one SAUc board should
be configured for a BSC6900 GSM, and a maximum of one to two SAUc boards should
be configured for a BSC6900 GU. SAU board redundancy is not required. Each SAUc
board requires one slot. If no SAUc board is configured, one slot in the MPS of a BSC6900
GSM should be reserved for SAU, and two slots in the MPS of a BSC6900 GU should be
reserved for SAUs.
NOTE
MPU is a logical unit of XPU board. The MPU implements board management and transfer internal
messages to other boards.
4.1.6 Subracks
Table 4-6 BSC6900 subracks
Model Abbreviation Name
QM1P00UMPS01 MPS Main Processing Subrack
QM1P00UEPS01 EPS Extended Processing Subrack
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Model Abbreviation Name
WP1D000TNU01 TNUb TDM Switching Unit
WP1X000OMU02 OMUc Operation and Maintenance Unit
WP1D000SAU01 SAUc Service Aware Unit
WP1D000SCU01 SCUb GE Switching Network and Control
Unit
By default, the following boards are delivered: TNUb, OMUc, SAUc, and SCUb.
l Configuration principles for the MPS
One MPS must be configured in a BSC6900 GSM. If IP transmission is used on all interfacesof a BSC6900 GSM, a pair of TNUb boards is not required. If an interface of the BSC6900 GSM
does not use IP transmission, a pair of TNUb boards needs to be configured in the MPS. For a
BSC6900 GSM or a BSC6900 GU in BM/TC separated mode, the MPS must work in GSM
mode.
l Configuration principles for the EPS
A maximum of three EPSs can be configured in a BSC6900 GSM. If an interface of the BSC6900
GSM does not use IP transmission, a pair of TNUb boards needs to be configured in each EPS.
Adhere to the following principles when configuring EPSs for a BSC6900 GSM:
lAll interface boards must be configured in the rear slots of an EPS. Service processing unitscan be configured in either the front or rear slots of an EPS.
l 10 rear slots of the GSM MPS are used to house GSM service processing units and interface
boards, and 8 front slots are used to house GSM service processing units.
l 14 rear slots of a GSM EPS are used to house GSM service processing units and interface
boards, and 10 front slots are used to house GSM service processing units.
l The number of GSM subracks cannot exceed 4.
The number of EPSs is calculated based on the number of service processing units and the
number of interface boards.
Number of GSM_EPSs = MAX((Total number of interface boards – Number of slots for interface boards in MPS)/14, (Total number of interface boards + Total number of service
processing boards – Total number of slots in MPS)/24)
The number of slots for interface boards in the MPS is 10, and the total number of slots in the
MPS is 18. If no TNUb board is configured, the total number of slots in the MPS is 20. The
number of slots for interface boards in an EPS is 14, and the total number of slots in the EPS is
24. If no TNUb board is configured, the total number of slots in an EPS is 26.
Maximum number of TNUb = 2 x (Number of GSM_EPSs + 1)
When the BSC uses all-IP transmission, a pair of TNUb boards is not required, and therefore
two additional slots in each subrack can be used for service processing boards.
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4.1.7 Cabinets
Table 4-7 Cabinets
Model Name Function
WP1B4PBCBN00 BSC6900 Cabinet Cabinet
A maximum of two cabinets and four subracks can be configured for a BSC6900 GSM.
Number of cabinets = Roundup ((Number of MPSs + Number of EPSs)/3)
where, Number of MPSs = 1.
Calcualtion of cabinet power consumption:
The maximum power consumption of BSC6900 MPS and EPS is 1400 W, and that of TCS is
1000 W; the maximum power consumption of a single cabinet is 5100 W.
The calculation formula:
BSC_Power_ Consumption_Tool.xls
NOTE
l Average power consumption (Pavg) is the estimated value in a typical operating environment. The
maximum power consumption mentioned in hardware description is obtained when all devices on
boards are full-loaded. This maximum power consumption cannot be obtained under the actual system
running conditions. Therefore, Pavg is provided for power consumption calculation.
l The maximum power consumption for a single subrack is 1700 W (including the power consumption
of fans) which is obtained when all slots of the subrack are configured with boards. It is recommended
that power distribution be configured as 1700 W per subrack. This can save power distribution
adjustment upon future capacity expansion.
4.1.8 Auxiliary Materials
Table 4-8 lists the auxiliary materials for installing a BSC6900 GSM.
Table 4-8 Auxiliary materials
Model Name Function
QW1P8D442000 Trunk Cable 75-ohm trunk cable
QW1P8D442003 Trunk Cable 120-ohm trunk cable
QW1P0STMOM00 STM-1 Optical Connector STM-1 optical unit
QW1P00GEOM00 GE Optical Connector GE optical unit
QW1P0FIBER00 Optical Fiber Optical cable
QW1P0000IM00 Installation Material
Package
Installation material suite
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Model Name Function
QMAI00EDOC00 Documentation Electronic documentation
l Configuration principles for 75-ohm trunk cables (QW1P8D442000):
The 75-ohm trunk cables must be in full configuration for a board.
Number of trunk cables = [Number of TDM interface units (32 E1s) + Number of IP
interface units (32 E1s)] x 2
NOTE
One trunk cable provides eight E1s. 32 E1s/8 E1s = 4. A trunk cable is a Y-shaped cable, which is
connected to both the active and standby boards.
l Configuration principles for 120-ohm trunk cables (QW1P8D442003):
The 120-ohm trunk cables must be in full configuration for a board.
Number of trunk cables = [Number of TDM interface units (32 E1s) + Number of IP
interface units (32 E1s)] x 2
NOTE
One trunk cable provides eight E1s. 32 E1s/8 E1s = 4. A trunk cable is a Y-shaped cable, which is
connected to both the active and standby boards.
l Configuration principle for STM-1 optical units (QW1P0STMOM00)
The STM-1 optical units are fully configured for active and standby optical interface boards.
Number of STM-1 optical units = Number of OIUa boards + Number of POUc boards x 4
l Configuration principle for GE optical unit (QW1P00GEOM00):The GE optical units are fully configured for active and standby optical interface boards.
Number of GE optical units = Number of WP1D000GOU01s or WP1D000GOU03s x 4
l Configuration principle for optical cables (QW1P0FIBER00):
The optical cables are configured based on the number of active and standby interface
boards and the number of optical ports required in the BSC6900.
Number of optical cables = (Number of STM optical ports + Number of GE optical ports)
+ 1
l Configuration principle for installation material suite (QW1P0000IM00):
One installation material suite (QW1P0000IM00) is configured for each BSC6900 cabinet(WP1B4PBCBN00).
l Configuration principle for electronic documentation (QMAI00EDOC00):
A set of electronic documentation (QMAI00EDOC00) is delivered with each BSC6900.
4.1.9 Example of Typical BSC6900 GSM Configuration
The following figure illustrates the typical procedure for configuring a BSC6900 GSM.
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Step 1 Input requirements.
The operator provides the network requirements which should include the information contained
in the following figure.
An example is given here. The following table lists input information.
Network Parameter Value
TRX QTY 1024
HR Ratio 50%
A Erl: Um Erl 80%
Gos in Um interface 0.02
Gos in A interface 0.001
GPRS Active Sub 100,000
Static PDCH per Cell 4
Dynamic PDCH per Cell 8
Built-in PCU Yes
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Network Parameter Value
BM/TC model (Separated or Combined) Separated
Whether to support GPS in BSC No
Whether to support TC Pool (if TC Pool is required, input the
number of required CIC circuits)
No
Step 2 Perform the measurements.
The following figure shows the dimensions that are used for calculating the configurations
Item Name Specification
1 TRX support capability A1
2 Abis E1 quantity A2
3 A CIC quantity A3
4 IWF quantity A4
5 BHCA A5
6 Gb throughput A6
Step 3 Obtain the network capacity requirements to calculate the hardware requirements.
Item Name Configuration BeforeCapacity Expansion
1 Subracks (MPS, EPS) B1
2 Data Processing Units (DPUf) B2
3 Data Processing Units (DPUg) B3
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Item Name Configuration BeforeCapacity Expansion
4 Extended Processing Units (XPUc) B4
5 Interface boards B5
6 Cabinets B6
----End
4.1.10 BSC6900 GSM Recommended Capacity for Delivery
For the sake of network security, the actual capacity of a configured BSC6900 is much lower
than the specified maximum capacity.
It is recommended that each BSC6900 GSM be configured with less than 3072 TRXs.
To ensure reliability of a large-scale network, the GBFD-113725 BSC Node Redundancy feature
must be configured when the number of GSM TRXs ranges from 3072 to 6144.
4.2 BSC6900 UMTS Product Configurations
A BSC6900 UMTS consists of hardware and hardware capacity licenses.
The main hardware components of the BSC6900 UMTS are service processing units, interface
boards, clock boards, subracks, and cabinets. The following sections describe the hardware
configuration scenarios and configuration methods.
The hardware includes cabinets, subracks, data processing units, signaling processing units,
network intelligence units, interface boards, and clock boards. The hardware capacity licenses
includes the Hardware Capacity License (165 Mbit/s), Gardware Capacity License (300 Mbit/
s), and Network Intelligence Throughput License.
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All the product specifications can be reached when the CPU load of the hardware is 70%.
The SPUb, GOUc, GCUa, and GCGb boards can be replaced with the SPUc, GOUe, GCUb,
and GCGb boards, respectively. The specifications of the old and new boards are the same, and
therefore the configurations of an old board also apply to the corresponding new board.
NOTICE
Note that if two boards work in active/standby mode, the two boards must be identical. To replace
a single-core board in a slot with a multi-core board, you must first remove the single-core board
from the slot and then insert the multi-core board into the slot.
4.2.1 Impact of Traffic Model on Configurations
The capacity of UMTS BSC6900 depends on the number of SPUc and DPUe boards and the
actual processing capacity in the traffic model. A UMTS BSC6900 can be configured with a
maximum of 50 pairs of SPUc boards and 50 pairs of DPUe boards. However because the number
of slots is limited, you cannot simultaneously configure the maximum board quantities of SPUb/
SPUc and DPUe.
Under Huawei smartphone traffic model, the maximum BHCA throughput reaches 12.8 Mbit/
s on the control plane. Under Huawei heavy PS traffic model, the maximum BHCA throughput
reaches 40 Gbit/s on the user plane. However, the control and user planes cannot simultaneously
reach their maximum throughput.
The maximum traffic volumes on the control and user planes are closely related to the traffic
model. Therefore, technical specifications of the BSC6900 are subject to the traffic model.
l On the user plane
The CPU overload threshold of the BSC6900 is 70%.
The promoted capability of the DPUe (for the user plane) is calculated based on the PS
RAB uplink/downlink (UL/DL) rate (64/384 kbit/s), which is the average rate of PS services
and is independent from specific bearer type (R99 or HSPA). Under this circumstance, the
PS throughput of DPUe is 800 Mbit/s, which is the maximum design specification.
In practice, due to rapid development of smartphones, the user plane of the network features
a large number of small packet interactions. On the live network, the actual PS throughput
of the DPUe depends on the mean data rate of UEs in the CELL_DCH or CELL_FACH
state (PS RAB mean data rate in active state). When the mean data rate of UEs in the
CELL_DCH or CELL_FACH state is low, the PS throughput of the DPUe is low. The
following figure shows the relationship between the PS throughput of the DPUe and the
mean data rate of UEs in the CELL_DCH or CELL_FACH state.
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PS RAB mean data rate in active state indicates the average data rate of PS services in the
activated states (including the CELL_DCH and CELL_FACH states). It can be calculated
by using the following formula based on the traffic model:
PS RAB mean data rate in active state (UL+DL) = PS throughput per subscriber during
busy hours x 3600/(PS call per subscriber per busy hour x Mean hold time in
Cell_DCH&Cell_FACH per PS call)
Table 4-9 Typical PS RAB mean data rate in active state and the corresponding PS
throughput of the DPUe
PS RAB mean data rate in
active state (UL+DL) (kbit/
s)
16 40 64 128 196 448
PS throughput capacity per
DPUe (Mbit/s)
90 250 300 430 530 800
The actual PS throughput of DPUe is estimated by using the following methods:
– If the PS RAB mean data rate in active state (UL+DL) (kbit/s) takes a value in the
interval (0, 16], PS Throughput Capacity per DPUe (Mbit/s) = PS RAB Mean data rate
x 5.625.
– If the PS RAB mean data rate in active state (UL+DL) (kbit/s) takes a value in the
interval (16, 40], PS Throughput Capacity per DPUe (Mbit/s) = 90 + (PS RAB Mean
data rate – 16) x 6.67.
– If the PS RAB mean data rate in active state (UL+DL) (kbit/s) takes a value in the
interval (40, 64], PS Throughput Capacity per DPUe (Mbit/s) = 250 + (PS RAB mean
data rate – 40) x 2.08.
– If the PS RAB mean data rate in active state (UL+DL) (kbit/s) takes a value in the
interval (64, 128], PS Throughput Capacity per DPUe (Mbit/s) = 300 + (PS RAB mean
data rate – 64) x 2.03.
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– If the PS RAB mean data rate in active state (UL+DL) (kbit/s) takes a value in the
interval (128, 196], PS Throughput Capacity per DPUe (Mbit/s) = 430 + (PS RAB mean
data rate – 128) x 1.47.
– If the PS RAB mean data rate in active state (UL+DL) (kbit/s) takes a value in the
interval (196, 448], PS Throughput Capacity per DPUe (Mbit/s) = 530 + (PS RAB meandata rate – 128) x 1.07.
– If the PS RAB mean data rate in active state (UL+DL) (kbit/s) takes a value in the
interval (448,∞), PS Throughput Capacity per DPUe (Mbit/s) = 800.
l On the control plane
The CPU overload threshold of the BSC6900 is 70% and base load is 10%. There are 8
CPUs per SPUb/SPUc board.
BHCA supported by an SPUc board = (70% - 10%) x 8/CPU usage consumed by a call
The CPU usage consumed by a single call is associated with the traffic model. When the
traffic model is changed, the available CPU usage of one SPUc board remains unchanged,
but the CPU usage consumed by a single call changes. Therefore, the BHCA supported byan SPUc board varies according to the traffic model.
The traffic model on a live network changes with time and UE behavior. Therefore, the
system may be congested because of limited control plane processing resources, even when
the traffic in the network does not reach the claimed capacity (Erl or throughput). When
the traffic model changes, recalculate the control-plane processing resources required by
the network. Then, add required processing modules and interface boards.
4.2.2 Hardware Capacity License
The BSC6900 V9