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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.

i

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


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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


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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.


Configuration Principle (Global) 1 Change History



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topics.


changes.


5.2.1 Precautions Modified the method of calculating the number

EGPUa boards.


05 (2014-04-30)

This is the fifth commercial release of V100R015C00.


topics.


changes.


4.1.6 Interface Boards

4.4.1 BSC6910 UMTS Examples of

Typical Configurations

Modified the method of estimating the number

of EXOUa boards.


04 (2014-03-28)

This is the fourth commercial release of V100R015C00.


topics.


changes.


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.





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Configurations

4.1.5 Service Processing Modules


of EGPUa UP boards.


Configurations



of EXOUa boards.


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.


03 (2014-01-20)

This is the third commercial release of V100R015C00.


topics.


changes.


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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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.



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.


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.


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.


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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6.1.1 UMTS Traffic Model Add the number of active users for UMTS under

typical traffic model.

4.1.2 Subrack Configurations


Updated the configuration principles for SAU

boards for UMTS and GSM.


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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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.


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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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.


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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


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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.


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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





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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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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.


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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


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.


Capacity per EGPUa UP (Mbps) = 220+(PS RAB Mean data rate –16)* 16.67.


Capacity per EGPUa UP (Mbps) =620 + (PS RAB Mean data rate – 40) * 5.83.


Capacity per EGPUa UP (Mbps) = 760 + (PS RAB Mean data rate – 64) * 5.63.


Capacity per EGPUa UP (Mbps) = 1120 + (PS RAB Mean data rate – 128) * 5.88.





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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.


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.



ranges [16, 40], PS

Throughput Capacity per

EGPUa UP (Mbps) = 220+(PS

RAB Mean data rate –16)*

16.67.


active state (UL+DL)(kbps)ranges [40, 64], PS


EGPUa UP (Mbps) =620 + (PS

RAB Mean data rate – 40) *

5.83.



ranges [64, 128], PS


EGPUa UP (Mbps) = 760 +

(PS RAB Mean data rate – 64)* 5.63.



ranges [128, 196], PS



(PS RAB Mean data rate – 128)

* 5.88.



ranges [196, 448], PS

a' = a Mbps/

Throughput

Capacity





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Item Description

ValueFormat

Prerequisites Calculation of theBoardQuantity

Iub

interface



(PS RAB Mean data rate – 128)

* 1.



ranges [448,∞], PS


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


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


network plan.

Iu-CS Iu-CS

transmission

type

Iu-CS interface

transmission type


network plan.

The BSC6910 supports the

following Iu-CS networking modes:


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


network plan.The BSC6910 supports the

following Iu-PS networking modes:


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 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);


resource pool

Any universal slots

ENIUa Evolved Network

Intelligence Unit


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);


resource pool

Any universal slots

GOUc IP Interface Unit

(4 GE, Optical)

Active/standby mode

(recommended);


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






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Board Description Redundancy Type Number of Slots

GCGa GPS&Clock

Processing Unit


4.1.9 Auxiliary Material Configurations

The following table lists the auxiliary materials.

Table 4-11 Auxiliary materials


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


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.


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.


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.


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.


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

bsc6910 configuration principle(global)(v100r015c00_07)(pdf)-en

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