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SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global)
Issue 07
Date 2014-09-12
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]
Issue 07 (2014-09-12) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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http://www.huawei.com/
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Contents
1 Change History..............................................................................................................................1
2 Introduction....................................................................................................................................7
2.1 Overview........................................................................................................................................................................7
2.2 Version Difference.........................................................................................................................................................7
3 Application Overview................................................................................................................10
4 Product Configurations..............................................................................................................13
4.1 BSC6910 UMTS Configurations..................................................................................................................................14
4.1.1 Cabinet Configurations..............................................................................................................................................14
4.1.2 Subrack Configurations.............................................................................................................................................15
4.1.3 Impact of the Traffic Model on Configurations........................................................................................................18
4.1.4 Hardwar e Capacity License Configurations..............................................................................................................20
4.1.5 Service Processing Modules......................................................................................................................................22
4.1.6 Interface Boards.........................................................................................................................................................27
4.1.7 Configuration Principles of Interface Boards and Service Boards............................................................................34
4.1.8 Board R edundancy Types..........................................................................................................................................34
4.1.9 Auxiliar y Material Configurations............................................................................................................................36
4.1.10 Descri ption of Restrictions on Inter-Subrack Switching.........................................................................................37
4.2 BSC6910 GSM Configurations....................................................................................................................................37
4.2.1 Cabinet Configurations..............................................................................................................................................37
4.2.2 Subrack Configurations.............................................................................................................................................38
4.2.3 Hardwar e Capacity License Configurations and Product Specifications..................................................................42
4.2.4 Service Boards...........................................................................................................................................................43
4.2.5 Interface Boards.........................................................................................................................................................47
4.2.6 General Principles for Slot Configurations...............................................................................................................50
4.2.7 Auxiliar y Material Configurations............................................................................................................................51
4.3 BSC6910 GU Product Configurations.........................................................................................................................52
4.4 Examples of Typical Configurations............................................................................................................................52
4.4.1 BSC6910 UMTS Examples of Typical Configurations............................................................................................52
4.4.2 BSC6910 GSM Examples of Typical Configurations...............................................................................................59
5 Expansion and Upgrade Configurations.................................................................................63
5.1 BSC6910 UMTS Expansion and Upgrade Configurations..........................................................................................63
SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global) Contents
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5.1.1 Hardware Expansion and Upgrade Configurations...................................................................................................63
5.1.2 Examples of Hardware Expansion............................................................................................................................64
5.2 BSC6910 GSM Expansion and Upgrade Configurations.............................................................................................65
5.2.1 Precautions.................................................................................................................................................................65
5.2.2 Hardware Capacity License Expansion.....................................................................................................................70
5.2.3 Examples of Hardware Expansion............................................................................................................................71
6 Appendix.......................................................................................................................................73
6.1 Traffic Model................................................................................................................................................................73
6.1.1 UMTS Traffic Model.................................................................................................................................................73
6.1.2 GSM Traffic Model...................................................................................................................................................76
6.2 Hardware Specifications...............................................................................................................................................77
6.2.1 UMTS Hardware Specifications................................................................................................................................77
6.2.2 GSM Hardware Specifications..................................................................................................................................84
7 Acronyms and Abbreviations...................................................................................................86
SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global) Contents
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1 Change HistoryThis chapter pr ovides information about the changes in different versions of
SRAN9.0&GBSS15.0&RAN15.0 BSC6910 Configuration Principle (Global).
07 (2014-09-12)
This is the seventh commercial release of V100R015C00.
Compared with Issue 06 (2014-06-09) of V100R015C00, this issue does not include any new
topics.
Compared with Issue 06 (2014-06-09) of V100R015C00, this issue incorporates the following
changes.
Content Change Description
4.1.6 Interface Boards l Changed the uplink or downlink throughput of EXOUa IUPS
from 10 Gbit/s to 9.5 Gbit/s.
l Changed the uplink or downlink throughput of EXOUa IUB
from 10 Gbit/s to 8 Gbit/s.
4.2.5 Interface Boards Added restrictions imposed on the calculation of backplane
bandwidth for POUc boards.
4.1.2 Subrack
Configurations
4.1.5 Service Processing
Modules
Added the description that only one ESAUa board is delivered
by default for GU or UMTS.
5.2.1 Precautions Modified the formula for calculating the number of EGPUa
boards.
Compared with Issue 06 (2014-06-09) of V100R015C00, this issue does not exclude any topics.
06 (2014-06-09)
This is the sixth commercial release of V100R015C00.
SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global) 1 Change History
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Compared with Issue 05 (2014-04-30) of V100R015C00, this issue does not include any new
topics.
Compared with Issue 05 (2014-04-30) of V100R015C00, this issue incorporates the following
changes.
Content Change Description
5.2.1 Precautions Modified the method of calculating the number
EGPUa boards.
Compared with Issue 05 (2014-04-30) of V100R015C00, this issue does not exclude any topics.
05 (2014-04-30)
This is the fifth commercial release of V100R015C00.
Compared with Issue 04 (2014-03-28) of V100R015C00, this issue does not include any new
topics.
Compared with Issue 04 (2014-03-28) of V100R015C00, this issue incorporates the following
changes.
Content Change Description
4.1.6 Interface Boards
4.4.1 BSC6910 UMTS Examples of
Typical Configurations
Modified the method of estimating the number
of EXOUa boards.
Compared with Issue 04 (2014-03-28) of V100R015C00, this issue does not exclude any topics.
04 (2014-03-28)
This is the fourth commercial release of V100R015C00.
Compared with Issue 03 (2014-01-20) of V100R015C00, this issue does not include any new
topics.
Compared with Issue 03 (2014-01-20) of V100R015C00, this issue incorporates the following
changes.
Content Change Description
4.1.1 Cabinet Configurations Changed "fan assembly" to "fan box" and
modified power consumption of fan boxes.
4.1.3 Impact of the Traffic Model on
Configurations
4.4.1 BSC6910 UMTS Examples of
Typical Configurations
Modified some descriptions.
SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global) 1 Change History
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Content Change Description
4.1.3 Impact of the Traffic Model on
Configurations
4.1.5 Service Processing Modules
Modified the method of estimating the number
of EGPUa UP boards.
4.1.3 Impact of the Traffic Model on
Configurations
4.1.6 Interface Boards
Modified the method of estimating the number
of EXOUa boards.
4.1.5 Service Processing Modules
6.2.1 UMTS Hardware Specifications
l Added the description that EGPUa CP and
UP specifications are designed for EGPUa
CP only boards and EGPUa UP only boards,
respectively.
l Added the method of calculating the
specifications of EGPUa CP&UP boards.
6.1.1 UMTS Traffic Model l Updated the definition of the smartphone
model.
l Changed the parameter value types to
integers for all models.
l Added "PS channel switch times".
l Updated the RNC capacity for the
smartphone model.
Compared with Issue 03 (2014-01-20) of V100R015C00, this issue does not exclude any topics.
03 (2014-01-20)
This is the third commercial release of V100R015C00.
Compared with Issue 02 (2013-06-16) of V100R015C00, this issue does not include any new
topics.
Compared with Issue 02 (2013-06-16) of V100R015C00, this issue incorporates the following
changes.
Content Change Description
3 Application Overview Extended the maximum number of NodeBs or
cells per cabinet to 10000/20000 for UMTS.
4.1.2 Subrack Configurations Changed the default number of ESAUa boards to
be configured from 1 to 0 (4 slots are reserved
for ESAU.)
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Configuration Principle (Global) 1 Change History
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Content Change Description
4.1.6 Interface Boards l Added descriptions about how to calculate
connection capabilities of IUPS interface
boards for UMTS.l Added Iur interface board specifications for
UMTS.
Corrected the reference error.
4.1.5 Service Processing Modules Corrected the formula for calculating N_
EGPUa_Iub_License.
4.1.5 Service Processing Modules
4.1.6 Interface Boards
Modified the method of calculating the number
of active users carried on EGPUa CP, EGPUa
UP, and interface boards.
6.1.1 UMTS Traffic Model l Modified the smartphone traffic model and
the capacity under this traffic model.
l Added the RRC capacity under each traffic
mode.
Compared with Issue 02 (2013-06-16) of V100R015C00, this issue does not exclude any topics.
02 (2013-06-16)
This is the second commercial release of V100R015C00.Compared with Issue 01 (2013-02-20) of V100R015C00, this issue includes the following new
topics:
l Configuration principles for POUc in Abis IP over E1/T1 for GSM
l Configuration principles for GSM when the Abis, A, and Gb interfaces use the same board
l Calculation of the numbers of Iur interface boards and their ports for UMTS when Iur
interface boards use different ports.
Compared with issue 01 (2013-02-20) of V100R015C00, this issue incorporates the following
changes.
Content Change Description
3 Application Overview Added the description that the UMTS BHCA
capacity is based on smartphone traffic model
and the UMTS PS throughput capacity is based
on high-PS traffic model.
4.1.3 Impact of the Traffic Model on
Configurations
Added pps specifications for interface boards
and the relationship between pps specifications
and bps specifications.
4.1.6 Interface Boards Added the description that the coefficient is
applicable only to IP interface boards.
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Configuration Principle (Global) 1 Change History
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Content Change Description
6.1.1 UMTS Traffic Model Add the number of active users for UMTS under
typical traffic model.
4.1.2 Subrack Configurations
4.2.2 Subrack Configurations
Updated the configuration principles for SAU
boards for UMTS and GSM.
4.1.6 Interface Boards
6.2.1 UMTS Hardware Specifications
Added the numbers of Iur interface boards and
their ports for UMTS when Iur interface boards
use different ports.
4.2.4 Service Boards Updated the configuration principles for GMCP
boards for GSM.
4.2.5 Interface Boards l Added the configuration principles for POUc
boards for GSM in Abis IP over E1/T1 mode.
l Added the configuration principles applied
when the Abis, A, and Gb interface uses the
same interface board.
4.1.6 Interface Boards Remove the coefficient used for calculating the
bps capabilities of GOUc/FG2c boards for GSM,
so that the calculation is in the same manner as
that for the BSC6900.
4.1.2 Subrack Configurations Added the description that a maximum of two
ESAUa boards are configured for UMTS and
accordingly updated the principles for arranging
slots in the MPS and the method of calculating
the number of EPSs.
4.2.6 General Principles for Slot
Configurations
Added the description that two slots are reserved
for ESAUa boards for GSM.
Compared with Issue 01 (2013-02-20) of V100R015C00, this issue excludes the following
topics.
l Coefficient used for calculating GOUc/FG2c boards
l NASP boards for UMTS and GU
01 (2013-02-20)
This is the first commercial release of V100R015C00.
Compared with Draft A (2012-06-26) of V100R015C00, this issue includes the following new
topics:
l EXPUa boards
l ENIUa hardware license
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Configuration Principle (Global) 1 Change History
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l Descriptions about license usage for the BSC6910: In the event of network swapping, the
BSC6900 license is invalid for the BSC6910 and must be quoted again, while the existing
BTS licenses are still valid and can be reused by the BSC6910.
l Recommendation that an independent Iur-P interface board be configured in the basic
subrack.
l Principles for configuring RNC in Pool.
Compared with Draft A (2012-06-26) of V100R015C00, this issue incorporates the following
changes.
Content Change Description
4.1.2 Subrack Configurations Detailed the configuration principles for EGPUa
and EXPUa boards.
4.1.1 Cabinet Configurations Updated the formula for calculating cabinet
power consumption.
4.1 BSC6910 UMTS Configurations Updated the coefficients used for calculating
UMTS EGPUa boards and interface boards at
different data rates.
4.1.5 Service Processing Modules Changed the formula N_EGPUa_UP = MAX(a'
b', c', n') to N_EGPUa_UP = MAX(a'+b', c', n').
Compared with Draft A (2013-02-16), this issue excludes the following topics:
l GCUb, GCGb, and TNUb boards
l Limitation that POUc boards can be configured only in 10 GE slots
Draft A (2012-06-26)
This is a draft for V100R015C00.
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Configuration Principle (Global) 1 Change History
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2 Introduction
2.1 Overview
This document describes product specifications, configuration principles, upgrade, and capacity
expansion for BSC6910 V100R015C00.
To meet requirements in different scenarios, the BSC6910 can work in the following modes:
l BSC6910 GSM: The BSC6910 works in GSM Only (GO) mode and functions as the base
station controller (BSC).
l BSC6910 UMTS: The BSC6910 works in UMTS Only (UO) mode and functions as the
radio network controller (RNC).
l BSC6910 GU: The BSC6910 works in GSM&UMTS (GU) mode and functions as both
the BSC and RNC.
2.2 Version Difference
The hardware configuration for the BSC6910 UMTS is as follows:
l Minimum: one cabinet with a main processing subrack (MPS)
l Maximum: two cabinets with an MPS and five extended processing subracks (EPSs)
The hardware configuration for the BSC6910 GSM is as follows:
l Minimum: one cabinet with a main processing subrack (MPS)
l Maximum: one cabinet with an MPS and two extended processing subracks (EPSs)
The mobile broadband network is experiencing an exponential growth of traffic volume, with
urgent requirement of intense coordination among different services and pacing evolution
toward cloud computing system for wireless network equipment (NE). To meet this challenge,
Huawei launches its new network controller product, the BSC6910. It uses a hardware structure
based on HW6910 R15 and a new BSC6900-based software structure.
In the UMTS network, an RNC pool can be configured by using BSC6910s alone or BSC6910s
and BSC6900s if the RNC In Pool feature is activated. RNCs within an RNC pool work in node
redundancy and resource sharing modes.
SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global) 2 Introduction
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Table 2-1 HW6910 R15 hardware
PartNumber
Name Description Function Description ApplicationScenario
QM1D00EGPU00
EGPUa EvolvedGeneral
Processing Unit
l Manages user plane andsignaling plane resource
pools.
l Processes BSC and RNC
signaling plane and user
plane services.
GSM &UMTS
QM1D00
EXPU00
EXPUa Evolved
Extensible
Processing Unit
l Manages BSC user plane
and signaling plane
resource pools.
l Processes BSC and RNC
signaling plane and user plane services.
GSM
QM1D00
EOMU00
EOMUa Evolved
Operation and
Maintenance
Unit
Performs configuration
management, performance
management, fault
management, security
management, and loading
management.
GSM &
UMTS
QM1D00
ESAU00
ESAUa Evolved Service
Aware Unit
Collects data about the call
history record (CHR) and pre-
processes the collected data.
GSM &
UMTS
QM1D00
EXOU00
EXOUa Evolved 10GE
Optical interface
Unit
l Provides two channels over
10 Gbit/s optical ports.
l Supports IP over GE.
l Used for Iu/Iub/Iur
GSM &
UMTS
QM1D00
ENIU00
ENIUa Evolved
Network
Intelligence
Unit
Provides intelligent service
identification.
GSM &
UMTS
WP1D000SCU01
SCUb GE Switchingnetwork and
Control Unit
Provides MAC/GE switchingand enables the convergence of
ATM and IP networks.
GSM &UMTS
WP1D000
FG201
FG2c IP Interface Unit
(12 FE/4 GE,
Electric)
IP: A/Abis/Lb/Gb/Iur-g
IP: Iu/Iub/Iur/Iur-g
GSM &
UMTS
WP1D000
GOU01
GOUc IP Interface Unit
(4 GE, Optical)
IP: A/Abis/Lb/Gb/Iur-g
IP: Iu/Iub/Iur/Iur-g
GSM &
UMTS
SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global) 2 Introduction
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3 Application OverviewThe hardware platform of the BSC6910 is characterized by high integration, high performance,
and modular structure. These characteristics enable the BSC6910 to meet networking
requirements in different scenarios and provide operators with a high-quality network at a low
cost.
Figure 3-1 shows the exterior of a BSC6910 cabinet (N68E-22).
Figure 3-1 Exterior of a BSC6910 cabinet (N68E-22)
Figure 3-2 shows the front view and rear view of a BSC6910 cabinet.
SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global) 3 Application Overview
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Figure 3-2 Front view and rear view of a BSC6910 cabinet
Table1 describes technical specifications of the BSC6910.
Table 3-1 Technical specifications of the BSC6910
Performance
Specifications
BSC6910 UMTS When two cabinets are configured, the specifications
are as follows: 10,000 NodeBs, 20,000 cells,
64,000,000 BHCA, 120 Gbit/s PS throughput or
250,000 CS traffic (Erl)
When one cabinet is configured, the specifications are
as follows: 10000 NodeB, 20,000 cells, 32,000,000
BHCA, 60 Gbit/s PS throughput or 125,000 CS traffic
(Erl)
BSC6910 GSM Per cabinet: 8000 BTSs, 8000 cells, 24,000 TRXs,
150,000 traffic (Erl), 96,000 PDCHs, 150,000 Erl,
52,000,000 integrated BHCA, 8 Gbit/s PS throughput
SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global) 3 Application Overview
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BSC6910 GU When two cabinets are configured, the specifications
for a BSC6910 working in different modes are as
follows:
l UMTS (5 subracks: 1 MPS and 4 EPSs): 10000
NodeBs, 20000 cells, 53,300,000 BHCA, 99.8
Gbit/s PS throughput or 208,000 CS traffic (Erl)
l GSM (3 subracks that can be configured across
cabinets: 2 EPSs): 8000 BTSs, 8000 cells, 24,000
TRXs, 150,000 Erl, 96,000 PDCHs, 5,200,000
integrated BHCA, 8 Gbit/s PS throughput
When one cabinet is configured, the specifications for
a BSC6910 working in different modes are as follows:
l UMTS (2 subracks: 1 MPS and 1 EPS): 3330
NodeBs, 6660 cells, 21,300,000 BHCA, 39.3 Gbit/
s PS throughput or 82,000 CS traffic (Erl)l GSM (1 EPS): 8000 BTSs, 8000 cells, 8000 TRXs,
50000 Erl, 32000 PDCHs, 17300000 integrated
BHCA, 3 Gbit/s PS throughput
Size and
Weight
N68E-22 dimensions (H x W x D): 2200 mm x 600 mm x 800 mm (86.61
in. x 23.62 in. x 31.50 in.)
Cabinet weight≤ 350 kg
Equipment room floor load-bearing capacity≥ 450 kg/m2
Power Supply –48 V DC input
Input voltage: –40 V DC to –57 V DC
Each subrack requires four 60 A inputs.
Power
Consumption
7100 W per cabinet
NOTE
l The BSC specifications cannot be accumulated by the specifications of boards.
l The BSC 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 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. The BHCA defined in
GSM is the maximum number of equivalent BHCA under Huawei traffic model. All user activities,
including CS location updates, CS handovers, PS TBF setups, PS TBF releases, and PS pagings, can
be converted into equivalent BHCA. 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 GCP CPU usage does not exceed 75% of
the average flow control threshold.
l The UMTS BHCA capacity is based on Smartphone traffic model, the UMTS PS throughput capacity
IS based on High-PS traffic model, which are defined in 6.1.1 UMTS Traffic Model.
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Configuration Principle (Global) 3 Application Overview
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4 Product ConfigurationsThe configurations of the BSC6910 can be divided as follows:
l Configurations of hardware, including the cabinets, subracks, general processing units,
operation and maintenance units, network intelligent units, interface boards, and clock
boards
l Configurations of hardware capacity licenses, including licenses for "Iub Total
Throughput", "Active User" and "Evolved Network Intelligence Throughput".
This chapter describes how to configure these hardware components and calculate the required
licenses.
SRAN8.0&GBSS15.0&RAN15.0 BSC6910
Configuration Principle (Global) 4 Product Configurations
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4.1 BSC6910 UMTS Configurations
This section describes how to configure hardware and calculate the number of required licenseswhen the BSC6910 works in the UMTS mode.
The main hardware components of the BSC6910 UMTS are service processing units, interface
boards, clock boards, subracks, and cabinets. The following sections describe the hardware
configuration scenarios and configuration methods.
The capacity of UMTS BSC6910 depends on the number and the power consumption of EGPUa
boards and the hardware actual processing capacity in the traffic model. A maximum of 128
EGPUa boards can be configured on the UMTS BSC6910 with two cabinets, excluding the pair
of EGPUa boards fixed for resource management. The EGPUa board can process services on
the control plane (CP) and user plane (UP) at one time. In Huawei Smartphone traffic model, a
maximum of 64,000,000 BHCA can be achieved on the control plane. In Huawei heavy PStraffic model, the maximum BHCA throughput reaches 120 Gbit/s on the user plane. However
the control and user plane cannot reach the maximum value at one time. The maximum traffic
volumes on the control and user planes are closely related to the traffic model. The following
figure shows the relationship between the BHCA and the PS throughput.
Figure 4-1 Relationship between capacity of control plane and use plane
4.1.1 Cabinet Configurations
The following table lists the cabinet configuration.
Table 4-1 Cabinet configuration
Part Number Description Remarks
QM1B0PBCDP00 Cabinet N/A
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Configuration principle:
A BSC6910 can be configured with a maximum of two cabinets. A maximum of three subracks
can be configured in each cabinet.
The number of cabinets required is calculated as follows:
1. For a new site
Number of cabinets_1 = ROUNDUP [(Number of MPSs + Number of EPSs)/3]
The number of MPSs is 1.
Number of cabinets_2 = ROUNDUP [SUM(Power consumption of all boards + power
consumption of fan assemblies)/7100]
The power consumption of a single subrack on the BSC6910 is 4000 W. The maximum
power consumption of a single cabinet on the BSC6910 is 7100 W.
Item Pavg (W)
Subarck (Two assemblies) 200
EXOUa/EGPUa/ENIUa/ EOMUa/
ESAUa
102
GOUc/FG2c/UOIc/ AOUc/ SCUb 80
GCGa/GCUa 20
Number of cabinets = MAX (Number of cabinets_1, Number of cabinets_2)
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 Maximum subrack power consumption is 4000 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 4000 W per subrack. This can save power distribution
adjustment upon future capacity expansion.
l Maximum cabinet power consumption is 7100 W which is the upper limit of the heat dissipation
capability in the equipment room and obtained based on survey and research. Therefore, themaximum cabinet power consumption is not 12,000 W.
2. For capacity expansion
Number of cabinets = Number of cabinets required after capacity expansion – Number of
cabinets configured before capacity expansion
4.1.2 Subrack Configurations
The following table lists the subrack configuration.
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Table 4-2 Subrack configuration
Part Number Name Description Function Description
QM1K00PBCS00 Subrack Unified service
architecture basic subrack
Processes basic services.
The MPS and EPS of the BSC6910 have the same physical structure; that is, they both use the
PARCb subrack. The difference is that the MPS houses the EOMUa, GCUa, GCGa, and EGPUa
boards (used for resource management), which are not housed in the EPS.
MPS configuration principle:
A BSC6910 must be equipped with one MPS only.
The MPS configurations are as follows:
1. Slot assignment:
l 8–9: EGPUa (Fixed)
l 10–13: EOMUa (recommended)
l 14–15: GCUa or GCGa (Fixed)
l 20–21: SCUb (Fixed)
l Reserve a pair of slots for the EOMUa board.
2. If the GPS clock is not required, each BSC6910 is configured with two GCUa boards,
working in 1+1 redundancy mode. If the GPS clock is required, each BSC6910 is configured
with two GCGa boards, working in 1+1 redundancy mode.3. The default number of ESAUa board is one for EBC. If the customer has purchased and
used Huawei Nastar or other OSS feature such as SON, one or two ESAUa boards need to
be configured in the MPS of the BSC6900. The number of ESAUa boards is up to OSS. It
is recommend ESAUa boards are configured in fixed slots(0,1,2,3) in MPS.
4. The EGPUa/ENIUa boards can be inserted in any vacant slots excepting fixed slots. An
MPS can provide 14 slots for the EGPUa/ENIUa board.
5. Interface boards can be inserted only in slots 16 to 19 and slots 22 to 27. It is not advised
that EGPUa and ENIUa be inserted into these slots.
6. AOUc, UOIc, GOUc, FG2c, and EXOUa are interface boards.
The EXOUa board can be inserted only in slots 16 to 19 and slots 22 to 25.AOUc, UOIc, GOUc and FG2c board can be inserted only in slots 16 to 19 and slots 22 to
27. Among them, slots 16 to 19 and 22 to 25 are preferred. An MPS provides 8 slots for
EXOUa boards and 10 slots for AOUc, UOIc, GOUc and FG2c boards.
7. Number of interface board slots provided by the MPS: 8 slots for EXOUa boards and 10
for AOUc/UOIc/GOUc/FG2c boards.
8. An MPS provides 14 universal slots.
9. It is recommended that the Iur-P interface board be configured in the MPS.
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The EPS configurations are as follows:
1. Slots 20 and 21 are reserved for the SCUb board.
2. The EGPUa/ENIUa boards can be inserted in any vacant slots excepting fixed slots; that
is, the EPS can provide 26 slots for the EGPUa/ ENIUa board.
3. Interface boards can be inserted only in slots 14 to 19 and slots 22 to 27. It is not advised
that EGPUa and ENIUa be inserted into these slots.
4. AOUc, UOIc, GOUc, FG2c, and EXOUa are interface boards.
For the EXOUa board, only slots 16 to 19 and slots 22 to 25 are available.
For the AOUc, UOIc, GOUc, and FG2c board, slots 14 to 19 and slots 22 to 27 are allavailable. And slots 16 to 19 and slots 22 to 25 are preferred. An EPS provides 8 slots for
EXOUa boards and 12 slots for AOUc, UOIc, GOUc and FG2c boards.
5. Number of interface board slots provided by the EPS: 8 slots for EXOUa boards and 12
for AOUc/UOIc/GOUc/FG2c boards.
6. An EPS provides 26 universal slots.
The number of required EPSs is calculated as follows:
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l For a new site
– Number of required EPSs_1 = ROUNDUP [(Number of required EXOUa boards –
Number of EXOUa boards that can be housed in an MPS)/Number of EXOUa boards
that can be housed in an EPS]
If the number of required EXOUa boards is smaller than that can be housed in an MPS,
the number of required EPSs is 0.
The MPS provides a maximum of 14 EGPUa boards.
The EPS provides a maximum of 26 EGPUa boards.
– Number of required EPSs_2 = ROUNDUP [(Number of required interface boards –
Number of interface boards that can be housed in an MPS)/Number of interface boards
that can be housed in an EPS]
If the number of required interface boards is smaller than that can be housed in an MPS,
the number of required EPSs_2 is 0.
The EPS provides a maximum of 8 EXOUa boards.
l Number of required EPSs_3 = ROUNDUP [(Number of required EGPUa boards + Number
of required interface boards – Number of universal slots provided by the MPS)/Number of
universal slots provided by one EPS]
If the number of required EGPUa boards and interface boards is smaller than the number
of universal slots provided by the MPS, the number of required EPSs_3 is 0.
The EPS provides a maximum of 10 interface boards.
The EPS provides a maximum of 12 interface boards.
l Number of required EPSs_4 = ROUNDUP [(Number of required EGPUa boards + Number
of required interface boards + Number of required ENIUa boards - Number of universal
slots provided by the MPS)/Number of universal slots provided by one EPS]If (Number of required EGPUa boards + Number of required interface boards) < Number
of universal slots provided by the MPS, the Number of required EPSs_4 is 0.
NOTE
Number of required EGPUa boards does not include the number of the fixed EGPUa boards in the main
subrack for resource management.
The MPS provides a maximum of 18 universal slots.
The EPS provides a maximum of 26 universal slots.
l Number of EPSs = MAX (Number of required EPSs_1, Number of required EPSs_2,
Number of required EPSs_3)l For capacity expansion
Number of required EPSs = Number of EPSs required after capacity expansion – Number
of EPSs configured before capacity expansion
4.1.3 Impact of the Traffic Model on Configurations
Technical specifications of the BSC6910 are subject to the traffic model.
Specifications of the BSC6910 are subject to the traffic model.
1. On the user plane
The CPU overload threshold of the BSC6910 is 70%.
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The capabilities of the EGPUa (on the user plane) and ENIUa are calculated in the traffic
model when the CPU usage reaches 70% and the PS RAB uplink/downlink rate is 64/384
kbit/s, which is the average rate of PS services and is independent from specific bearer type.
In this case, the PS throughput of the EGPUa is 2000 Mbit/s. 2000Mbit/s is also the
maximum design specification,. But in the real commercial networks, as the rapid growthup of smart phone penetration, user plane is characterized by numerous small packets,
which leads the real throughput capacity of EGPUa cannot reach 2000Mbit/s, but decreases
with the decrement of PS RAB mean data rate in active state, as shown in Figure 4-2.
Figure 4-2 Relationship between Throughput Capacity of EGPUa UP only board and mean
data rate
PS RAB mean data rate in active state(UL+DL) = PS throughput per subscriber in BH
*3600/( PS call per sub per BH * mean hold time in Cell_DCH&Cell_FACH per PS call).
Table 4-3 Some typical PS RAB mean data rates in active state and corresponding PS
Throughput supported by EGPUa UP only board
Mean data rate (UL/DL kbps) 8/8 8/32 32/32 64/64 64/128 64/384
Throughput Capacity of
EGPUa UP board(Mbps)
222 610 800 1250 1540 2000
If PS RAB Mean data rate in active state (UL+DL)(kbps) ranges [0, 16], PS Throughput
Capacity per EGPUa UP(Mbps) = PS RAB Mean data rate * 13.75.
If PS RAB Mean data rate in active state (UL+DL)(kbps) ranges [16, 40], PS Throughput
Capacity per EGPUa UP (Mbps) = 220+(PS RAB Mean data rate –16)* 16.67.
If PS RAB Mean data rate in active state (UL+DL)(kbps) ranges [40, 64], PS Throughput
Capacity per EGPUa UP (Mbps) =620 + (PS RAB Mean data rate – 40) * 5.83.
If PS RAB Mean data rate in active state (UL+DL)(kbps) ranges [64, 128], PS Throughput
Capacity per EGPUa UP (Mbps) = 760 + (PS RAB Mean data rate – 64) * 5.63.
If PS RAB Mean data rate in active state (UL+DL)(kbps) ranges [128, 196], PS Throughput
Capacity per EGPUa UP (Mbps) = 1120 + (PS RAB Mean data rate – 128) * 5.88.
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If PS RAB Mean data rate in active state (UL+DL)(kbps) ranges [196, 448], PS Throughput
Capacity per EGPUa UP (Mbps) = 1520 + (PS RAB Mean data rate – 128) * 1.
If PS RAB Mean data rate in active state (UL+DL)(kbps) ranges [448,∞], PS Throughput
Capacity per EGPUa UP (Mbps) = 2000.
2. Transmission and forwarding capacity of interface boards
For EXOUa, Data forwarding capacity (unit: bit/s) is measured by the throughput. The
throughput depends on the average packet length and packet forwarding capacity (unit:
packet per second, pps) in the following formula:
Throughput (bit/s) = Average packet length x Packet forwarding capacity (pps)
The board packet forwarding capacity is fixed as follows:
EXPUa: 8400000 pps
Generally, the throughput decreases with the decrement of packet length. However the
packet length is uncertain when you plan pre-sale configurations.
We provide some typical capacity in real commercial networks as follows for reference:
The typical transmission packet length of Iub interface is 150Bytes.
The typical transmission packet length of Iu-PS interface is 750Bytes.
EXOUa Iub interface board throughput (Gbps)= Min(The typical transmission packet
length of Iub interface * pps * transmission efficiency, 10) = Min
(150*8*8400000*0.8/1000000000, 10) = 8 (Gbps)
EXOUa IuPS interface board throughput (Gbps)= Min(The typical transmission packet
length of Iub interface * pps * transmission efficiency, 10) = Min
(750*8*8400000*0.8/1000000000, 10) = 10 (Gbps)
3. On the control plane
The CPU overload threshold of the BSC6910 is 70% and base load is 10%.
BHCA supported by an EGPUa (for the control plane) board = (70% – 10%)/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 EGPUa (for the control plane)
board remains unchanged (60%), but the CPU usage consumed by a single call changes.
Therefore, the BHCA supported by an EGPUa (for the control plane) board varies according
to the traffic model.
The traffic model on a live network changes with time and user equipment (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, it is necessary to recalculate the control plane
processing resources required by the network. Then, necessary processing modules and
interface boards must be added according to the requirements.
4.1.4 Hardware Capacity License Configurations
The BSC6910 V100R015C00 supports the licenses for the following control items:
l "Iub Total Throughput" (including CS and PS traffic)
l "Active User" (including users whose status is CELL_DCH or CELL_FACH)
l "Evolved Network Intelligence Throughput"
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Table 4-4 Service boards and license control items
Service Board &License Control Item
Function Description Specifications
EGPUa Processes services andallocates resources on the
user plane and control
plane.
All resource of the EGPUa boardused for user plane: 2000 Mbit/s (PS
throughput, based on Huawei High
PS traffic model) or 10,050 CS
traffic (Erl), 1400 cells, and 35,000
active users, 70000 Online Users
All resource of the EGPUa board
used for control plane: 1,668,000
BHCA (based on Huawei's
Smartphone traffic model), 700
NodeBs or 1400 cells, and 28,000
active users, 70000 Online Users
EGPUa board is always used as
CP&UP sharing board, the real
specifications of one EGPUa board
should be calculted by the ratio of
CP/UP.
Iub Total Throughput Hardware capacity
license: Controls the Iub
interface throughput.
Max: 120 Gbit/s; Step: 50 Mbit/s
Active User Hardware capacitylicense: Controls the
number of active users.
Max: 1,000,000; Step: 1000
ENIUa Evolved Network
Intelligence Unit
PS throughput: 8000 Mbit/s
Network Intelligence
Throughput License
Evolved Network
Intelligence Throughput
License
Maximum160 Evolved Network
Intelligence Throughput License,
one license: 50 Mbit/s.
l Iub Total Throughput
The control item "Iub Total Throughput" covers both the CS and PS service traffic with a
step of 50 Mbit/s. The value of this control item is determined by the number of EGPUa
(for the user plane) boards. With this control item, the throughput processing capabilities
of the existing hardware are improved at a step of 50 Mbit/s.
l Active User
The control item "Active User" refers to the number of users whose status is CELL_DCH
or CELL_FACH. The step is 1000. The value of this control item is determined by the
number of EGPUa (for the control plane) boards. With this control item, the number of
active users supported by the existing hardware is increased at a step of 1000.
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l Network Intelligence Throughput License
This license can be configured for a network intelligence unit ENIUa(QM1D00ENIU00)
to increase the SA(Service Awareness) processing capability. Maximum of 160 network
intelligence throughput licenses can be configured for one ENIUa. Network intelligence
throughput licenses can be shared among the ENIUa boards of a single BSC6910 UMTS.That is, evolved network intelligence throughput licenses form a resource pool and are not
bound to specific boards. In RAN15.0, each ENIUa provides a maximum PS throughput
of 8000 Mbit/s. Evolved Network intelligence throughput licenses are not automatically
moved with hardware. For example, when an ENIUa is moved from one BSC6910 UMTS
to another, its evolved network intelligence throughput licenses are not moved.
4.1.5 Service Processing Modules
The following table lists the specifications of service processing modules.
Table 4-5 Specifications of service processing modules
Name Description Function Specifications Remarks
EGPUa Evolved
General
Processing
Unit (for the
user plane)
Processes
services and
allocates
resources on
the user plane
and control
plane.
All resource of the
EGPUa board used f
or user plane: 2000
Mbit/s (PS
throughput, based on
High-PS traffic
model) or 10,050 CS
traffic (Erl), 1400
cells, and 28,000active users
PS throughput is
calculated based on
the UL/DL rate 64/384
kbit/s.
All resource of the
EGPUa board used f
or control plane:
1,668,000 BHCA
(based on
Smartphone traffic
model), 700 NodeBs
or 1400 cells, 35,000
active users
The BHCA is
calculated based on
Huawei's Smartphone
traffic model.
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Name Description Function Specifications Remarks
When control plane and user plane sharing one
EGPUa board, the real capacity of EGPUa
board should be calculation by the ratio of CP/UP subsystem in this board. Eg. Ratio of CP
subsystem in the EGPUa board is p%,
PS Throughput:2000Mbps * (1-p%) (based on
High-PS traffic model) or 10,050 CS Erlang *
(1-p%);
Cell: Min{1400*p%, 1400*(1-p%)};
NodeB: Min{700*p%, 700*(1-p%)};
Active User: Min{35000*p%, 28000*(1-p
%)};
Online User: 70,000 * p%.
ENIUa Evolved
Network
Intelligence
Unit
Provides
intelligent
service
identification.
PS throughput: 8000 Mbit/s
NOTE
Active User refers to users whose status is CELL_DCH or CELL_FACH.
The EGPUa board can process services on both the user plane and control plane. You cancalculate the number of EGPUa boards required by the control plane and that required by the
user plane, and then add the two numbers to obtain the total number of required EGPUa boards.
l Configuring EGPUa Boards Required by the User Plane and Hardware Capacity License
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Item Description
ValueFormat
Prerequisites Calculation of theBoardQuantity
Iub PS
through
put
PS
throughpu
t over the
a Mbit/s PS RAB mean data rate in
active state(UL+DL) = PS
throughput per subscriber in
BH *3600/( PS call per sub per
BH * mean hold time in
Cell_DCH&Cell_FACH per
PS call).
If PS RAB Mean data rate in
active state (UL+DL)(kbps)
ranges [0, 16], PS Throughput
Capacity per EGPUa UP
(Mbps) = PS RAB Mean data
rate * 13.75.
If PS RAB Mean data rate in
active state (UL+DL)(kbps)
ranges [16, 40], PS
Throughput Capacity per
EGPUa UP (Mbps) = 220+(PS
RAB Mean data rate –16)*
16.67.
If PS RAB Mean data rate in
active state (UL+DL)(kbps)ranges [40, 64], PS
Throughput Capacity per
EGPUa UP (Mbps) =620 + (PS
RAB Mean data rate – 40) *
5.83.
If PS RAB Mean data rate in
active state (UL+DL)(kbps)
ranges [64, 128], PS
Throughput Capacity per
EGPUa UP (Mbps) = 760 +
(PS RAB Mean data rate – 64)* 5.63.
If PS RAB Mean data rate in
active state (UL+DL)(kbps)
ranges [128, 196], PS
Throughput Capacity per
EGPUa UP (Mbps) = 1120 +
(PS RAB Mean data rate – 128)
* 5.88.
If PS RAB Mean data rate in
active state (UL+DL)(kbps)
ranges [196, 448], PS
a' = a Mbps/
Throughput
Capacity
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Item Description
ValueFormat
Prerequisites Calculation of theBoardQuantity
Iub
interface
Throughput Capacity per
EGPUa UP (Mbps) = 1520 +
(PS RAB Mean data rate – 128)
* 1.
If PS RAB Mean data rate in
active state (UL+DL)(kbps)
ranges [448,∞], PS
Throughput Capacity per
EGPUa UP (Mbps) = 2000.
per EGPUa
UP(Mbps)
Iub CS
traffic
CS traffic
over the
Iub
interface
b Erl N/A b' = b/
10,050
Active
users
Number of
active
users
n N/A n' = n/
28,000
Cell
number
Number of
cells
managed
by the
RNC
c
It is
determined
based on the
network plan.
N/A c' = c/1400
The number of EGPUa boards required for the user plane is calculated using the following
formula:
N_EGPUa_UP = max(a' + b', c', n')
The number of licenses required for "Iub Total Throughput" is calculated using the
following formula:
N_EGPUa_Iub_License = ROUNDUP[(a+ b *24.4/1000)/50 Mbit/s]
l Configuring EGPUa Boards Required by the Control Plane and Hardware Capacity License
Item Description Value Format Prerequisites Calculation ofthe BoardQuantity
BHCA
requirement
BHCA
required by
the network
b
It is calculated
based on the
number of users
and traffic
model.
Assume that the
BHCA in this
traffic model is
x.
b' = b/x
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Item Description Value Format Prerequisites Calculation ofthe BoardQuantity
Active users Number of active users nIt is calculated
based on the
number of users
and traffic
model.
n' = n/35,000
NodeB
number
Number of
NodeBs
managed by
the RNC
nb
(It is determined
based on the
network plan.)
nb' = nb/700
Cell number Number of cells
managed by
the RNC
c
(It is determined
based on the
network plan.)
c' = c/1400
The number of EGPUa boards required for the control plane is calculated using the
following formula:
N_EGPUa_CP = max(b', n', nb', c')
N_EGPUa = ROUNDUP(N_EGPUa_CP + N_EGPUa_UP)
The number of hardware capacity licenses required for "Active User" is calculated using
the following formula:
N_EGPUa_ActiveUser_License = ROUNDUP (n/1000)
l Redundancy Configurations for Service Processing Modules:
The EGPUa board can process services on both the control plane and user plane. All the
EGPUa boards (for both the user plane and control plane) form a resource pool and work
in the N+1 redundancy mode.
l Configuring ENIUa Boards Required by the User Plane and Hardware Capacity License
Item Description
Value Format Prerequisites Calculation ofthe BoardQuantity
Iub PS
throughput
PS
throughput
over the Iub
interface
a Mbit/s a' = a/8000
If the SA(Service Awareness) function needs to be provided, ENIUa must be configured.
The number of ENIUa boards required:
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N_ NIUa = ROUNDUP (a/8000) ;
Evolved Network Intelligence Throughput License = ROUNDUP (a/50)
NOTE
The ENIUa can enable hardware processing capability only when "Evolved Network IntelligenceProcessing Throughput(per 50Mbps)" is loaded.
l Configuration Principle of ESAUa Boards
The default number of SAU board is one for EBC. If the customer has purchased and used
Huawei Nastar or other OSS feature such as SON, one or two SAUc boards need to be
configured in the MPS of the BSC6900. The number of SAUc boards is up to OSS.
Configuration Scenarios Number of SAU boards(pcs)
Nastar Only 1
At least one in EBC and SON 1
Nastar, and at least one in EBC and SON 2
4.1.6 Interface Boards
The BSC6910 supports the following interfaces:
l GE electrical interface
l GE optical interface
l10GE optical interface
l Channelized STM-1 interface
l Unchannelized STM-1 interface
Table 4-6 Interface boards
Interface Board Description Interface
GOUc IP Interface Unit (4 GE, Optical) Iub/Iu/Iur/Iur-p/Iur-g
FG2c IP Interface Unit (12 FE/4 GE, Electric) Iub/Iu/Iur/Iur-p/Iur-g
AOUc ATM Interface Unit (4 STM-1,Channelized)
Iub
UOIc ATM Interface Unit (8 STM-1,
Unchannelized)
Iub/Iu/Iur
EXOUa Evolved 10GE Optical interface Unit (2
10GE)
Iub/Iu/Iur/Iur-p/Iur-g
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Table 4-7 Iub/Iur/Iur-g/Iur-p interface specifications
Board Iub/Iur/Iur-g/Iur-p Number of
Connected
NodeBs
CID/UDP
Voice
(Erl)
VP
(Erl)
UL
(Mbit/s)
DL
(Mbit/s)
UL+DL
(Mbit/s)
FG2c/
GOUc
18,000 18,00
0
2600 2600 2600 500 129,000
AOUc 18,000 5500 300 300 600 500 79,000
UOIc 18,000 9000 800 800 1200 500 79,000
EXOUa 75,000 75,00
0
8000 8000 10,000 1500 1,000,000
Table 4-8 Iu-CS/Iu-PS interface specifications
Board Iu-CS Iu-PS
Voice
(Erl)
VP(Erl) UL
(Mbit/s)
DL(Mbit/
s)
UL
+DL
(Mbit/
s)
IU PS
on-line
users
(TEID)
IU PS
Session
setup/
release
times
FG2c/
GOUc
18,000 9000 3200 3200 3200 200,000 5000
UOIc 18,000 9000 900 900 1800 120,000 5000
EXOUa 75,000 37,500 10,000 10,000 10,000 500,000 50,000
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NOTE
l The values of UL (Mbit/s), DL (Mbit/s), and DL (Mbit/s) are calculated based on the UL/DL rate
64/384 kbit/s.
l The service processing specifications of the Iur interface are the same as those of the Iub interface.
l The preceding tables list the maximum processing capabilities of boards. For example, values in the
Number of Connected NodeBs indicate the maximum numbers of NodeBs that can be connected. The
actual number of NodeBs is restricted by the throughput.
l VP in the preceding tables refers to the 64 kbit/s video phone service
l One active CS user consumes two CIDs/UDPs on the Iub interface board, and one active HSPA PS
user consumes three CIDs/UDPs on the Iub interface board.
l One active CS user consumes one CID/UDP on the Iu-CS interface board, and PS user consumes one
"IU PS online users"(TEID Tunnel Endpoint ID) on the Iu-PS interface board.
l Online users: specify the users in the RRC connection, including CELL_DCH, CELL_FACH,
CELL_PCH, and URA_PCH users. Active users: specify the users in CELL_DCH or CELL_FACH
status.
l The number of session setups/releases indicates the signaling processing capability of interface boardsand is applicable to the IuPS interfaces. The following table lists the mapping between the interface
signaling processing requirements and the traffic model.
Table 4-9 Session setup/release times in IuPS for every signaling procedure in traffic model
Control plane traffic parameter Unit IuPS session setup/ release times
CS voice call per subscriber per BH times -
Handover times per CS voice call (Inter/Intra RNC
soft handover)
times/call -
PS call per subscriber per BH times 1
Handover times per PS call (Inter/Intra RNC soft
handover)
times/call -
PS channel switch per PS call times/call 0.5
Cell update per PS call times/call 0.5
NAS signaling per subscriber per BH(times) times/per
subscriber
-
The following table lists the network factors that must be considered during interface board
configurations.
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Interface
Item Description Remarks
Iub Iub
transmissiontype
Iub interface
transmission type
It is determined based on the
network plan.The BSC6910 supports the
following Iub networking modes:
l FE Electrical (IP)
l GE Optical (IP)
l 10GE Optical (IP)
l Unchannelized STM-1 (ATM)
l Channelized STM-1 (ATM)
Iub PS
throughput
PS throughput over
the Iub interface
They are calculated based on the
number of users and traffic model.
Iub CS traffic CS traffic over the Iub
interface
Iub active users
(CID/UDP)
Number of transport
bearers for active
users supported by the
Iub interface of the
RNC
NodeB quantity Number of NodeBs
managed by the RNC
It is determined based on the
network plan.
Iu-CS Iu-CS
transmission
type
Iu-CS interface
transmission type
It is determined based on the
network plan.
The BSC6910 supports the
following Iu-CS networking modes:
l FE Electrical (IP)
l GE Optical (IP)
l 10GE Optical (IP)
l Unchannelized STM-1 (ATM)
l Channelized STM-1 (ATM)
Iu-CS CS traffic Iu interface CS service
traffic
It is calculated based on the number
of users and traffic model.
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Interface
Item Description Remarks
Iu-PS Iu-PS
transmissiontype
Iu-PS interface
transmission type
It is determined based on the
network plan.The BSC6910 supports the
following Iu-PS networking modes:
l FE Electrical (IP)
l GE Optical (IP)
l 10GE Optical (IP)
l Unchannelized STM-1(ATM)
Iu-PS
throughput
Iu interface PS service
traffic
It is calculated based on the number
of users and traffic model.
Iu-PS onlineusers
Number of onlineusers over the Iu-PS
connecting to the
RNC
IuPS session
set-up and
release
requirement in
BH
Number of sessions
that need to be
supported on the Iu-
PS interface of RNC
The following table shows how to configure the Iub interface board, (Iur interface is similar to
Iub interface).
Item Description Prerequisites Calculation ofthe BoardQuantity
Iub Iub
transmission
type
It is determined based
on the network plan.
The BSC6910 supports
the following Iubnetworking modes:
l FE Electrical (IP)
l GE Electrical (IP)
l GE Optical (IP)
l 10GE Optical (IP)
l Unchannelized
STM-1 (ATM)
l Channelized
STM-1 (ATM)
The board
specification is
determined based on
the interface type.
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Item Description Prerequisites Calculation ofthe BoardQuantity
Iub PSthroughput a Mbit/s(The calculation
method is the same as
that of the EGPUa UP.)
Calculate the Boardreal capacity for PS
throughput in Iub
interface(Gbps)=
Min[Transmission
packet length of Iub
interface (Byte) * 8 *
8400000 * 80%/
1,000,000,000,
10],or,
useing the default
recommended value:
8Gbps,correspond-
ing to mean transport
packet length of
150Byte.
For EXOUa board: a' = a/
Board real
capacity for PS
throughput in
Iub interface
For GOUa/
FG2c/ATM
interface board:
a' = a/ Board
specification
Iub CS
traffic
b Erl
(The calculation
method is the same as
that of the EGPUa UP.)
b' = b/Board
specification
Iub active
users (CID/UDP)
an
(It refers to the number of active users
supported by the Iub
interface. )
an' = an/Board
specification
NodeB
quantity
nb'
(It is determined based
on the network plan.)
nb' = nb/Board
specification
The number of Iub boards required by the network is calculated as follows:
N_IF_IUB = ROUNDUP(MAX(a'+ b', n', nb'))
The configuration method of the Iu-CS, Iu-PS and Iur interfaces are similar to that of the Iub
interface (without considering the NodeB).
For Iur interace, if there are several Iur interaces which do not share ports with each other, the
port requirement and port specification of each interface board should be take into account.
The following table shows how to configure the IuCS/IuPS interface board
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Item Description Limitations Calculation of theBoard Quantity
Iu IuPS
Throughput
IuPS_a Mbps Calculate the Board real
capacity for PS throughputin IuPS interface(Gbps)
=Min[ Transmission packet
length of Iub interface
(Byte) 8*8400000 * 80%/
1000000000, 10], or,
useing the default
recommended value: 10
(Gbps).
1. EXOUa board: a' =
IuPS_a Mpbs/IuPS real
specification of
EXOUa board.
2. FG2c board and
ATM boards:
a' = IuPS_a / Board
IuPS specification
IuCS Traffic IuCS_b Erl b' = IuCS_b / Board
Erlang specification
IuPS on-line
users
IuPS_users c' = IuPS_users/Board
TEID specificaiton
IuPS session
set-up and
release
requirement
in BH
IuPS_session
s
d' = IuPS_sessions/Iu-
PS session setup and
release requirement
If IuPS and IuCS share interface board:
N_INT_Iu(pair) = ROUNDUP[Max(a' + b', c', d')]
If IuPS and IuCS not share interface board:
N_INT_IuCS(pair) = ROUNDUP(b')
N_INT_IuPS(pair) = ROUNDUP[Max(a', c', d')]
N_INT_Iu(pair) = N_INT_IuCS + N_INT_IuPS
Redundancy Configuration for Interface Boards
The interface boards support the following backup modes:
l 1+1 backup mode (Double the number of required interface boards calculated based on
actual network capacity.)
l N+1 backup mode (This mode applies only to IP interface boards where the resource pools
are enabled.)
Only GOUc, FG2c, EXOUa boards support the N+1 backup mode.
By default, the 1+1 backup mode is used. In this mode, the number of required interface boards
is calculated as follows:
Sum (Iub, Iu-CS, Iu-PS, Iur) x 2
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In N+1 backup mode, if Iur, Iu-CS, and Iu-PS interfaces share one board, the number of interface
boards = ROUNDUP ((SUM(Iu-CS interfaces, Iu-PS interfaces, Iur interfaces) + 1).
If Iur, Iu-CS, and Iu-PS interfaces are separately configured on different boards, the number of
interface boards + SUM[(ROUNDUP (Iu-CS interfaces)+1, ROUNDUP(IUPS)+1, ROUNDUP
(IUR)+1)]. If some of Iur, Iu-CS, and Iu-PS interfaces share one board, the number of interface
boards is calculated based on the proceeding two formulas.
4.1.7 Configuration Principles of Interface Boards and ServiceBoards
Service boards and interface boards must be distributed evenly among subracks to reduce the
CPU and swapping resources consumed during inter-subrack swaps and avoid traffic volume
restrictions caused by limited inter-subrack bandwidths. Assume that there are 12 GPU (for the
control plane) boards, 9 GPU (for the user plane) boards, 3 EXOUa boards, and 3 subracks.
Then, it is recommended that four GPU (for control plane) boards, three GPU (for the user plane)
boards, and one EXOUa board be configured in each subrack.
Iu interface boards in each subrack form a resource pool. A route to the core network is
configured on each Iu interface board.
Iub interface boards in each subrack form a transmission resource pool. Routes to all the NodeBs
are configured on each Iub interface board.
4.1.8 Board Redundancy Types
The following table lists the board redundancy types.
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Table 4-10 Board Redundancy Types
Board Description Redundancy Type Number of Slots
EGPUa Evolved General
Processing Unit
N+1 backup mode in the
resource pool
Any universal slots
EOMUa Evolved
Operation and
Maintenance Unit
Active/standby mode An EOMUa board is installed in
two slots in the MPS only.
Active and standby boards are
installed in four consecutive
slots starting with an odd-
numbered slot. All the boards
are configured in the same plane
(rear or back plane).
ESAUa Evolved Service
Aware Unit
Separately configured Zero, one, or two ESAUa boards
are installed and every ESAUa board occupies two slots.
EXOUa Evolved 10GE
Optical interface
Unit
Active/standby mode
(recommended);
N+1 backup mode in the
resource pool
Any universal slots
ENIUa Evolved Network
Intelligence Unit
N+1 backup mode in the
resource pool
Any universal slots
SCUb GE Switching
network andControl Unit
Active/standby mode Fixed slots
FG2c IP Interface Unit
(12 FE/4 GE,
Electric)
Active/standby mode
(recommended);
N+1 backup mode in the
resource pool
Any universal slots
GOUc IP Interface Unit
(4 GE, Optical)
Active/standby mode
(recommended);
N+1 backup mode in the
resource pool
Any universal slots
AOUc ATM Interface
Unit (4 STM-1,
Channelized)
Active/standby mode Of the two boards in each pair,
one must be installed in an odd-
numbered slot and the other in
an adjacent even-numbered slot.
UOIc ATM Interface
Unit (8 STM-1,
Unchannelized)
Active/standby mode Of the two boards in each pair,
one must be installed in an odd-
numbered slot and the other in
an adjacent even-numbered slot.
GCUa General Clock
Unit
Active/standby mode Fixed slots
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Board Description Redundancy Type Number of Slots
GCGa GPS&Clock
Processing Unit
Active/standby mode Fixed slots
4.1.9 Auxiliary Material Configurations
The following table lists the auxiliary materials.
Table 4-11 Auxiliary materials
Part Number Description Remarks
QW1P00GEOM00 GE Optical Connector GE optical module
QW1P0STMOM00 STM-1 Optical Connector STM-1optical module
QM1P00GEOM01 10GE Optical Connector 10GE optical module
QW1P0FIBER00 Optical Fiber Optical fiber
QW1P0000IM00 Installation Material Package Installation material
suite
QMAI00EDOC00 Documentation Electronic
documentation
WP1B4PBCBN00 Cabinet Cabinet
l Configuration principle of GE optical modules (QW1P00GEOM00):
The GE optical modules are fully configured on optical interface boards.
Number of GE optical modules = Number of WP1D000GOU01s x 4
l Configuration principle of STM-1 optical modules (QW1P0STMOM00):
The STM-1 optical modules are fully configured on optical interface boards.
Number of STM-1 optical modules = (Number of WP1D000AOU01s) x 4 + (Number of
WP1D000UOI01s) x 8
l Configuration principle of 10GE optical modules (QM1P00GEOM01):
The 10GE optical modules are fully configured on optical interface boards.
Number of 10GE optical modules = Number of QM1D00EXOU00 x 2
l Configuration principle of the optical fibers (QW1P0FIBER00):
The optical cables are configured according to the number of optical modules required in
the BSC6910.
Number of optical fibers = (Number of 10GE optical modules + Number of GE optical
modules) x 2
l Configuration principle of the installation material suite (QW1P0000IM00):
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One installation material suite is configured for each BSC6910 cabinet
(WP1B4PBCBN00).
l Configuration principle of the electronic documentation (QMAI00EDOC00):
A set of electronic documentation is delivered with each BSC6910.
4.1.10 Description of Restrictions on Inter-Subrack Switching
A pair of active and standby SCUb boards can process data at 40 Gbit/s on the physical layer.
The SCUb boards in various subracks are connected in chain mode.
If either of the active and standby board becomes faulty, the processing capability is halved.
If the SCU boards are not evenly configured among the subracks or services are not evenly
deployed among the subracks, the volume of inter-subrack data flows may sharply increase.
Once the volume exceeds the capacity, services are interrupted. Therefore, all types of boards
should be evenly configured among subracks, services should be evenly deployed, and the user-
plane capacity should be similar.
For example,
There are 15 EGPUa boards, 8 pairs of GOUc boards for the Iub interface, and 6 subracks. Based
on the preceding configuration principles, each subrack should be configured with two or three
EGPUa boards, one or two pairs of GOUc boards. The subrack with more EGPUa boards should
be configured with more GOUc boards. The following table lists a recommended configuration.
Subrack Number of EGPUa Boards Number of GOUc Boards (pair)
MPS 3 2
EPS 1 3 2
EPS 2 3 1
EPS 3 2 1
EPS 4 2 1
EPS 5 2 1
4.2 BSC6910 GSM ConfigurationsThis section describes hardware configurations and how to calculate the number of required
licenses when the BSC6910 works in the GO mode.
4.2.1 Cabinet Configurations
The following table lists the cabinet configuration.
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Table 4-12 Cabinet configurations
Part Number Description Remarks
QM1B0PBCDP00 Cabinet N/A
A BSC6910 GSM can be configured with one cabinet to achieve maximum capacity. A
maximum of three subracks can be configured in each cabinet.
In GU mode, the three subracks can be distributed in two cabinets.
4.2.2 Subrack Configurations
The following table lists the subrack configuration.
Table 4-13 Subrack Configurations
Part Number Name Description Function Description
QM1K00PBCS00 Subrack Unified service
architecture basic subrack
Processes basic services.
The MPS and EPS of the BSC6910 have the same physical structure; that is, they both use the
PARCb subrack. The difference is that the MPS houses the EOMUa, GCUa, GCGa, and EGPUa/
EXPUa (for resource management) boards, which are not housed in the EPS.
Table 4-14 Fixed board configurations
Board LogicalFunction
Description FunctionDescription
ConfigurationPrinciple
EGPUa
/EXPUa
RMP Resource
Management
Processing
Provides the
resource
management
function.
One pair of boards is
configured on the
BSC in 1+1 backup
mode. The board is the
same as that used by
the universal service processor (USP).
EOMUa OMU Evolved
Operation and
Maintenance
Unit
Provides the
evolved operation
and maintenance
function.
One pair of boards is
configured on the
BSC in 1+1 backup
mode. Each EOMUa
board is installed in
two slots.
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Board LogicalFunction
Description FunctionDescription
ConfigurationPrinciple
SCUb SCU GE Switching
network andControl Unit
Provides the PS
switching andcontrol function.
One pair of boards is
installed in eachsubrack in 1+1 backup
mode. A maximum of
three pairs can be
configured on the
BSC.
GCUa/
GCGa
GCU General Clock
unit (with GPS)
Provides the
general clock. The
GCGa supports
the GPS function.
One pair of boards is
configured on the
BSC in 1+1 backup
mode.
MPS configuration principle:
A BSC6910 must be equipped with one MPS only.
The MPS configurations are as follows:
1. Slot assignment:
l 8–9: EGPUa/EXPUa (Fixed)
l 10–13: EOMUa (recommended)
l 14–15: GCUa or GCGa (Fixed)
l 20–21: SCUb (Fixed)
2. If the GPS clock is not required, each BSC6910 is configured with two GCUa boards,
working in 1+1 redundancy mode. If the GPS clock is required, each BSC6910 is configured
with two GCGa boards, working in 1+1 redundancy mode.
3. If the customer uses Huawei Nastar/SON, 1~2 pcs ESAUa boards are required and be
inserted in slot 0~3 commended. MPS needs to reserve 4 slots for ESAUa even if the ESAUa
boards are not configured temporarily.
4. The EGPUa/EXPUa boards can be inserted in any vacant slots excepting fixed slots. An
MPS can provide 14 slots for the EGPUa/EXPUa board.
5. Interface boards can be inserted only in slots 16 to 19 and slots 22 to 27. It is not advisedthat EPUa and ESAUa be inserted into these slots.
6. GOUc, FG2c, EXOUa and POUc are interface boards.
The EXOUa boards can be inserted only in slots 16 to 19 and slots 22 to 25.
The POUc, GOUc, and FG2c boards can be inserted only in slots 16 to 19 and slots 22 to
27. Among them, slots 16 to 19 and 22 to 25 are preferred.
7. An MPS provides 18 universal slots and 10 interface board slots. The 10 interface slots
consist of 8 10GE slots and 2 GE slo