bsc6910 configuraion principle (v100r015c00_02)(pdf)-en

SRAN8.0&GBSS15.0&RAN15.0 BSC6910

Configuration Principle

Issue 02

Date 2013-06-16

HUAWEI TECHNOLOGIES CO., LTD.

Issue 02 (2013-06-16) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

Copyright © Huawei Technologies Co., Ltd. 2013. 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.


Configuration Principle Change History



ii

Change History

This chapter describes changes in the SRAN8.0&GBSS15.0&RAN15.0 BSC6910

Configuration Principle.

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:

For GSM, add POUc for Abis IP over E1/T1

For GSM, add configuration of INT for Abis/A/Gb all in one board.

For UMTS, add the Iur calculation method in the case that several Iur interfaces not sharing ports

Compared with issue 01 (2013-02-20) of V100R015C00, this issue incorporates the

following changes:

Content Change Description

2 Application Overview Update Table 2-1, add description of the typical

traffic model for UMTS capacity

3.1.4 Impact of the Traffic Model on

Configurations

Add description of pps specification of interface

board and the relationship between pps and bps

specifications.

3.1.7 Interface Boards Add the description in 3.1.7 that the weight

coefficients are only applicable to IP interface

board, not ATM interface board.

5.1.1 UMTS Traffic Model Add the active users capacity for typical traffic

model

3.1.2 Cabinet Configurations

3.2.2 Subrack Configurations For UMTS and GSM，update the SAU

configuration rules.

3.1.7 Interface Boards

5.2.1 UMTS For UMTS，add the IUR calculation method in

the case that several Iur interfaces not sharing ports.

Compared with issue 01 (2013-02-20) of V100R015C00, this issue excludes the following

new topics:


Configuration Principle Change History



iii

For UMTS, delete coefficients of GOUc/FG2c boards’ calculation.

For UMTS, NASP board is no need, delete the description about NASP of UMTS and

GU.

01 (2013-02-20)

This is the first commercial release of V100R015C00.

Compared with issue Draft A (2012-06-26) of V100R015C00, this issue includes the

following new topics:

Added PEUc for the BSC6900 and EXPUa for the BSC6910.

Added the ENIUa hardware license.

Added the description about license usage for the BSC6900 to the BSC6910: The

BSC6900 license of is not valid for the BSC 6910 and needs to be is quoted again. The existing BTS licenses are still valid for the BSC6910.

Added a recommended principle for configuring an independent Iur-P interface board in

the main subrack.

Added the principle for configuring the RNC in Pool.

Compared with issue Draft A (2012-06-26) of V100R015C00, this issue incorporates the

following changes:

Content Change Description

3.2.2 Subrack Configurations Detailed the principles of for configuring EGPUa

and EXPUa boards.

3.2.1 Cabinet Configurations Updated the formula for calculating cabinet

power consumption.

3.1 BSC6910 UMTS Configurations Updated the configuration principles on the

UMTS side: Added the board capacity

coefficients under different typical rates.

3.1.6 Service Processing Modules Update N_EGPUa_UP = MAX(a' b', c', n') to

N_EGPUa_UP = MAX(a'+b', c', n')

Compared with issue Draft A (2012-06-26) of V100R015C00, this issue excludes the

following new topics:

The GCUb, GCGb, and TNUb are removed from BSC6910.

Removed the limitation that the POUc boards can be configured only in the 10 GE slots.

Draft A (2012-06-26)

This is the Draft A release of V100R015C00.


Configuration Principle Contents



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Contents

Change History ........................................................................................................................... ii

1 Introduction .............................................................................................................................. 1

1.1 Overview................................................................................................................................................... 1

1.2 Version Difference ..................................................................................................................................... 1

2 Application Overview ............................................................................................................. 4

3 Product Configurations ........................................................................................................... 7

3.1 BSC6910 UMTS Configurations ................................................................................................................ 7

3.1.1 Cabinet Configurations ..................................................................................................................... 8

3.1.2 Subrack Configurations..................................................................................................................... 9

3.1.3 Impact of the Traffic Model on Configurations .................................................................................12

3.1.4 Hardware Capacity License Configurations ......................................................................................15

3.1.5 Service Processing Modules .............................................................................................................16

3.1.6 Interface Boards...............................................................................................................................19

3.1.7 Configuration Principles of Interface Boards and Service Boards ......................................................24

3.1.8 Board Redundancy Types .................................................................................................................25

3.1.9 Auxiliary Material Configurations ....................................................................................................26

3.1.10 Description of Restrictions on inter-subrack switching ....................................................................27

3.2 BSC6910 GSM Configurations .................................................................................................................28

3.2.1 Cabinet Configurations ....................................................................................................................28

3.2.2 Subrack Configurations....................................................................................................................28

3.2.3 Hardware Capacity License Configurations and Product Specifications ............................................32

3.2.4 Service Boards .................................................................................................................................33

3.2.5 Interface Boards...............................................................................................................................37

3.2.6 General Principles for Slot Configurations .......................................................................................39

3.2.7 Auxiliary Material Configurations ....................................................................................................40

3.3 BSC6910 GU Product Configurations .......................................................................................................41

3.4 Examples of Typical Configurations ..........................................................................................................41

3.4.1 BSC6910 UMTS .............................................................................................................................41

3.4.2 BSC6910 GSM ................................................................................................................................46

4 Expansion and Upgrade Configurations ............................................................................. 49

4.1 BSC6910 UMTS ......................................................................................................................................49


Configuration Principle Contents



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4.1.1 Hardware Expansion and Upgrade Configurations ............................................................................49

4.1.2 Examples of Hardware Expansion ....................................................................................................50

4.2 BSC6910 GSM .........................................................................................................................................51

4.2.1 Precautions ......................................................................................................................................51

4.2.2 Hardware Capacity License Expansion .............................................................................................55

4.2.3 Examples of Hardware Expansion ....................................................................................................55

5 Appendix ................................................................................................................................. 58

5.1 Traffic Model ...........................................................................................................................................58

5.1.1 UMTS Traffic Model .......................................................................................................................58

5.1.2 GSM Traffic Model .........................................................................................................................60

5.2 Hardware Specification .............................................................................................................................61

5.2.1 UMTS .............................................................................................................................................61

5.2.2 GSM ...............................................................................................................................................67

6 Acronyms and Abbreviations ............................................................................................... 70


Configuration Principle 1 Introduction



1

1 Introduction

1.1 Overview

This document describes product specifications, configuration principles, upgrade, and

capacity expansion for BSC6910 V100R015C00.

NOTE To meet requirements in different scenarios, the BSC6910 can work in the following modes:

BSC6910 GSM: The BSC6910 works in GSM Only (GO) mode and functions as the base station controller (BSC).

BSC6910 UMTS: The BSC6910 works in UMTS Only (UO) mode and functions as the radio network controller (RNC).

BSC6910 GU: The BSC6910 works in GSM&UMTS (GU) mode and functions as both the BSC and RNC.

1.2 Version Difference The hardware configuration for the BSC6910 UMTS is as follows:

Minimum: one cabinet with a main processing subrack (MPS)

Maximum: two cabinets with an MPS and five extended processing subracks (EPSs)

The hardware configuration for the BSC6910 GSM is as follows:

Minimum: one cabinet with a main processing subrack (MPS)

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 1-1 HW6910 R15 hardware

Part Number

Name Description Function Description Application Scenario

QM1D00

EGPU00

EGPUa Evolved

General

Processing Unit

Manages user plane and

signaling plane resource

pools.

Processes BSC and RNC

signaling plane and user plane services.

GSM &

UMTS

QM1D00

EXPU00

EXPUa Evolved

Extensible

Processing Unit

Manages BSC user plane and

signaling plane resource

pools.

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

Provides two channels over 10

Gbit/s optical ports.

Supports IP over GE.

Used for Iu/Iub/Iur

GSM &

UMTS

QM1D00

ENIU00

ENIUa Evolved

Network

Intelligence Unit

Provides intelligent service

identification.

GSM &

UMTS

WP1D000

SCU01

SCUb GE Switching

network and Control Unit

Provides MAC/GE switching

and enables the convergence of ATM and IP networks.

GSM &

UMTS

WP1D000

FG201

FG2c IP Interface

Unit (12 FE/4

GE, Electric)

IP: Iu/Iub/Iur/Iur-g/A/Abis/Gb GSM &

UMTS

WP1D000

GOU01

GOUc IP Interface

Unit (4 GE, Optical)

IP: Iu/Iub/Iur/Iur-g/A/Abis/Gb GSM &

UMTS

WP1D000

AOU01

AOUc ATM Interface

Unit (4 STM-1,

Channelized)

ATM: Iu/Iub/Iur UMTS





3

Part Number

Name Description Function Description Application Scenario

WP1D000

UOI01

UOIc ATM Interface

Unit (8 STM-1,

Unchannelized)

ATM: Iub/Iur/Iu-CS UMTS

WP1D000

POU01

POUc TDM or IP

Interface Unit

(4 STM-1,

Channelized)

TDM: Abis

IP over STM-1: Abis

GSM

WP1D000

GCU01

GCUa General Clock

Unit

Obtains the system clock

source, performs the functions

of phase-lock and holdover, and provides clock signals.

GSM &

UMTS

QW1D00

0GCG01

GCGa GPS & Clock

Processing Unit

Obtains the system clock

source, performs the functions

of phase-lock and holdover, and provides clock signals.

Unlike the GCUa board, the

GCGa board can receive and

process GPS signals.

GSM &

UMTS

QM1B0P

BCDP00

N/A Assembly

Cabinet

N/A GSM &

UMTS

QM1K00

PBCS00

N/A Backplane

Subrack, PARCb

N/A GSM &

UMTS

CAUTION

The BSC6900 cannot be upgraded to the BSC6910 by upgrading the software.


Configuration Principle 2 Application Overview



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2 Application Overview

The 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 2-1 shows the exterior of a BSC6910 cabinet (N68E-22).

Figure 2-1 Exterior of a BSC6910 cabinet (N68E-22)





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Figure 2-2 shows the front view and rear view of a BSC6910 cabinet.

Figure 2-2 Front view and rear view of a BSC6910 cabinet

Table 2-1 describes technical specifications of the BSC6910.

Table 2-1 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: 5000 NodeB, 10,000 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:

UMTS (5 subracks: 1 MPS and 4 EPSs): 8320 NodeBs,

16,640 cells, 53,300,000 BHCA, 99.8 Gbit/s PS throughput or 208,000 CS traffic (Erl)

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:

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)

GSM (1 EPS): 2800 BTSs, 2800 cells, 8400 TRXs,

52,500 Erl, 33,600 PDCHs, 18,200,000 integrated BHCA, 2.8 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 100 A inputs.

Power Consumption 7100 W per cabinet

The BSC specifications cannot be accumulated by the specifications of boards.

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.

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.

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.


Configuration Principle 3 Product Configurations



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3 Product Configurations

The configurations of the BSC6910 can be divided as follows:

Configurations of hardware, including the cabinets, subracks, general processing units,

operation and maintenance units, network intelligent units, interface boards, and clock boards

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.

3.1 BSC6910 UMTS Configurations This section describes how to configure hardware and calculate the number of required

licenses when the BSC6910 works in the UMTS mode.

The capacity of UMTS BSC6910 depends on the number of EGPUa boards and the actual

processing capacity in the traffic model. A maximum of 128 EGPUa boards can be configured

on the UMTS BSC6910, 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 PS traffic 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.





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Figure 3-1 Relationship between capacity of control plane and use plane


Table 3-1 Cabinet configurations

Part Number Description Remarks

QM1B0PBCDP00 Cabinet N/A

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:

For a new site

Number of cabinets_1 = ROUNDUP [(Number of MPSs + Number of EPSs)/3, 0]

The number of MPSs is 1.

Number of cabinets_2 = ROUNDUP [SUM(Power consumption of all boards + power consumption of fan boxes)/7100,0]

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 Average power consumption (Pavg)

Fan box 200

EXOUa/EGPUa/ENIUa/

EOMUa/ESAUa

102

GOUc/FG2c/UOIc/ AOUc/ SCUb 80





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Item Average power consumption (Pavg)

GCGa/GCUa 20

Number of cabinets = MAX (Number of cabinets_1, Number of cabinets_2)

NOTE 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.

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.

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, the maximum cabinet power consumption is not 12,000 W.

For capacity expansion

Number of cabinets = Number of cabinets required after capacity expansion – Number of cabinets configured before capacity expansion

3.1.2 Subrack Configurations

Table 3-2 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 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:

− 8–9: EGPUa (Fixed)

− 10–13: EOMUa (recommended)

− 14–15: GCUa or GCGa (Fixed)

− 20–21: SCUb (Fixed)

− 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.





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3. If the customer uses Huawei Nastar or the OSS features like EBC and SON, one or two

ESAUa boards are required and can be inserted in any vacant slots. It is recommended

ESAUa boards are configured in fixed slots(0,1,2,3) in MPS. Four slots must be reserved for two ESAUa boards.

4. The EGPUa/ENIUa boards can be inserted in any vacant slots excepting fixed slots. An

MPS can provide 18 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 EPUa 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.

14 15 16 17 18 19 20 21 22 23 24 25 26 27

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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 all

available. 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.





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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.

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The number of required EPSs is calculated as follows:

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,0)

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 22 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.

− 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.

− Number of required EPSs_4 = ROUNDUP [(Number of required EGPUa boards +

Number of required interface boards + Number of required ENIUa boards - Number





12

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.

− Number of EPSs = MAX (Number of required EPSs_1, Number of required EPSs_2, Number of required EPSs_3)


Number of required EPSs = Number of EPSs required after capacity expansion – Number of EPSs configured before capacity expansion

3.1.3 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.

On the user plane

The CPU overload threshold of the BSC6910 is 70%.

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 and that of the ENIU is 8000 Mbit/s.

The PS throughput decreases with the decrement of PS data rate, as shown in the figure

below.





13

Figure 3-2 Relationship between throughput and data rate(UL+DL) for EGPUa UP

The capability of the EGPUa (for the user plane) is calculated based on the PS RAB

uplink/downlink (UL/DL) rate (64/384 kbit/s), which is the average rate of PS services and is independent from specific bearer type.

For example, assume that the PS data traffic types consist of the followings:

− UL/DL 8/8 kbit/s: u%

− UL/DL 8/32 kbit/s: v%

− UL/DL 32/32 kbit/s: w%

− UL/DL 64/64 kbit/s: x%

− UL/DL 64/128 kbit/s: y%

− UL/DL 64/384 kbit/s and higher: z%

Where

u% + v% + w% + x% + y% + z% = 100%

In the preceding traffic model, the specification of the EGPUa (for the user plane) board is calculated using the following formula:

Specification of the EGPUa (for the user plane) board = EGPUa (for the user plane) claimed specification/(u%/0.11 + v%/0.31 + w%/0.38 + x%/0.56 + y%/0.76 + z%/1)

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:





14

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. In this case, certain

coefficients are made for different typical rates based on the experience data of commercial networks and security considerations. The coefficients are as follows:

EXOUa Iub interface board throughput = Expected EXOUa throughput/(u%/0.35 + v%/0.8 +

w% / 0.9 + x%/1 + y%/1 + z%/1)

EXOUa Iu-PS interface board throughput = Expected EXOUa throughput/(u%/0.7 + v%/1 +

w%/1 + x%/1 + y%/1 + z%/1)

PS throughput of GOUc and FG2c interface boards is not affected by traffic models in a

similar way as EXOUa boards. Therefore, GOUc and FG2c interface boards have no

coefficients as EXOUa interface boards.

For example, assume that the PS data traffic types consist of the followings:

− UL/DL 8/8 kbit/s: u%

− UL/DL 8/32 kbit/s: v%

− UL/DL 32/32 kbit/s: w%

− UL/DL 64/64 kbit/s: x%

− UL/DL 64/128 kbit/s: y%

− UL/DL 64/384 kbit/s and higher: z%

Where

u% + v% + w% + x% + y% + z% = 100%

In the preceding traffic model, the specification of the EXOUa board is calculated using

the following formula:

Specification of the EXOUa IUB board = EXOUa (for the user plane) claimed specification/(u%/0.35 + v%/0.8 + w%/0.9 + x%/1 + y%/1 + z%/1)

NOTE The proceeding coefficients and formula can be used for calculating the PS throughput of other interface boards (GOUc/FG2c).

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, recalculate the control plane processing

resources required by the network. Then, necessary processing modules and interface boards must be added according to the requirements.





15

3.1.4 Hardware Capacity License Configurations

The BSC6910 V100R015C00 supports the licenses for the following control items:

"Iub Total Throughput" (including CS and PS traffic)

"Active User" (including users whose status is CELL_DCH or CELL_FACH)

"Evolved Network Intelligence Throughput"

For details on how to calculate the number of required licenses, see section 3.1.5 "Service

Processing Modules."

Table 3-3 Service boards and license control items

Service Board & License Control Item

Function Description Specifications

EGPUa Processes services and

allocates resources on

the user plane and control plane.

For the user plane: 2000 Mbit/s

(PS throughput) or 10,050 CS

traffic (Erl), 1400 cells, and 35,000 active users, 70000 Online Users

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

Iub Total Throughput Hardware capacity

license: Controls the Iub

interface throughput.

Max: 120 Gbit/s; Step: 50 Mbit/s

Active User Hardware capacity

license: 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.

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.

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





16

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.

Network Intelligence Throughput License

This license can be configured for a network intelligence unit ENIUa(QM1D00ENIU00) to

increase the DPI processing capability. Maximum of 160 network intelligence throughput

licenses can be configured for one ENIUa. Network intelligence throughput licenses can be

shared among the ENIUas 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 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.

3.1.5 Service Processing Modules

Table 3-4 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.

For the user plane:

2000 Mbit/s (PS

throughput) or

10,050 CS traffic

(Erl), 1400 cells,

and 28,000 active

users

PS throughput is

calculated based on

the UL/DL rate

64/384 kbit/s.

For the control

plane: 1,668,000

BHCA, 700 NodeBs

or 1400 cells,

35,000 active users

The BHCA is

calculated based on

Huawei's Smartphone traffic model.

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 can

calculate 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.





17

Table 3-5 Configuring EGPUa Boards Required by the User Plane and Hardware Capacity

License

Item Description Value Format Prerequisites Calculation of the Board Quantity

Iub PS

throughput

PS throughput

over the Iub interface

a Mbit/s

Assume that the PS

data traffic types

consist of the

followings:

UL/DL 8/8 kbit/s: u%

UL/DL 8/32 kbit/s: v%

UL/DL 32/32

kbit/s: w%

UL/DL 64/64 kbit/s: x%

UL/DL 64/128 kbit/s: y%

UL/DL 64/384

kbit/s and higher: z%

where

u%+v%+w% + x% + y% + z% = 100%

a' = a

*(u%/0.11 +

v%/0.31 +

w%/0.38 +

x%/0.56 +

y%/0.76 +

z%/1)/2000

Iub CS

traffic

CS traffic


b Erl

N/A b' = b/10050

Iub active

users

Number of

active users

supported by

the Iub interface

n

N/A n' = n/28000

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/50 Mbit/s), 0)





18

Table 3-6 Configuring EGPUa Boards Required by the Control Plane and Hardware Capacity

License


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

control plane

active users

Number of

active users

supported on

the control plane

n

(It is calculated

based on the

number of users

and traffic model.)

n' = n/35000

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, 0)

The number of hardware capacity licenses required for "Active User" is calculated using the

following formula:

N_EGPUa_ActiveUser_License = ROUNDUP (n/1000, 0)

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.





19

Table 3-7 Configuring ENIUa Boards Required by the User Plane and Hardware Capacity

License


Iub PS

throughput

PS

throughput


a Mbit/s

(For details about

how to calculate

it.)

a' = a/8000

If the DPI function needs to be provided, ENIUa must be configured

The number of ENIUa boards required:

N_ NIUa = ROUNDUP (a/8000, 0);

Evolved Network Intelligence Throughput License = ROUNDUP (a/50, 0)


The BSC6910 supports the following interfaces:

GE electrical interface

GE optical interface

10GE optical interface

Channelized STM-1 interface

Unchannelized STM-1 interface

Table 3-8 Interface boards

Interface Board Description Interface

GOUc IP Interface Unit (4 GE, Optical) Iub/Iu/Iur/Iur-p

FG2c IP Interface Unit (12 FE/4 GE, Electric) Iub/Iu/Iur/Iur-p

AOUc ATM Interface Unit (4 STM-1, Channelized) Iu/Iub/Iur

UOIc ATM Interface Unit (8 STM-1, Unchannelized) Iub/Iu-CS/Iur

EXOUa Evolved 10GE Optical interface Unit (2 10GE) Iub/Iu/Iur/Iur-p

Table 3-9 Iub/Iur interface specifications

Board Iub/Iur Number of Connected NodeBs

CID/UDP

Voice (Erl)

VP (Erl)

UL (Mbit/s)

DL (Mbit/s)

UL+DL (Mbit/s)

GOUc 18,000 18,000 2600 2600 2600 500 129,000





20

Board Iub/Iur Number of Connected NodeBs

CID/UDP

Voice (Erl)

VP (Erl)

UL (Mbit/s)

DL (Mbit/s)

UL+DL (Mbit/s)

FG2c 18,000 18,000 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 37,500 10,000 10,000 10,000 1500 1,000,000

Table 3-10 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 online users

GOUc 18,000 9000 3200 3200 3200 200,000

FG2c 18,000 9000 3200 3200 3200 200,000

UOIc 18,000 9000 900 900 1800 120,000

EXOUa 75,000 37,500 10,000 10,000 10,000 500,000

NOTE 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.

The service processing specifications of the Iur interface are the same as those of the Iub interface.

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.

VP in the preceding tables refers to the 64 kbit/s video phone service

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.

One active CS user consumes one CIDs/UDPs on the Iu-CS interface board, and one active HSPA PS user consumes one CIDs/UDPs on the Iu-CS interface board.

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.

The following table lists the network factors that must be considered during interface board

configurations.

Interface

Item Description Remarks

Iub Iub transmission type

Iub interface transmission type

It is determined based on the network plan.





21

Interface


The BSC6910 supports the

following Iub networking modes:

FE Electrical (IP)

GE Optical (IP)

10GE Optical (IP)

Unchannelized STM-1 (ATM)

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 Number of 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


network plan.

The BSC6910 supports the

following Iu-CS networking modes:

FE Electrical (IP)

GE Optical (IP)

10GE Optical (IP)



Iu-CS CS traffic Iu interface CS

service traffic

It is calculated based on the


Iu-CS active

users

Number of active

users over Iu-CS

interfaces connecting to the RNC

Iu-PS Iu-PS

transmission type

Iu-PS interface

transmission type


network plan.

The BSC6910 supports the following Iu-PS networking modes:

FE Electrical (IP)

GE Optical (IP)

10GE Optical (IP)

Unchannelized STM-1(ATM)





22

Interface


Iu-PS throughput Iu interface PS

service traffic

For EXOUa board: a’ = a

*( u%/0.7 + v%/1 + w% / 1 + x%

/ 1 + y% / 1 + z% / 1)/ Board specification.

For GOUa/FG2c/ATM interface board: a’ = a/ Board specification

Iu-PS online

users

Number of online

users over the Iu-PS

connecting to the RNC

It is calculated based on the


The following table shows how to configure the Iub interface board, (Iur interface is similar to

Iub interface).

Interface

Item Description Prerequisites Calculation of the Board Quantity

Iub Iub

transmission type

It is determined based

on the network plan.

The BSC6910

supports the following

Iub networking

modes:

FE Electrical (IP)

GE Electrical (IP)

GE Optical (IP)

10GE Optical (IP)



The board

specification is

determined based on the interface type.





23

Interface


Iub PS

throughput

a' Mbit/s

(The calculation

method is the same as

that of the EGPUa

UP.)

Assume that the PS

data traffic types

consist of the

followings:

UL/DL 8/8 kbit/s: u%

UL/DL 8/32 kbit/s: v%

UL/DL 32/32

kbit/s: w%

UL/DL 64/64 kbit/s: x%

UL/DL 64/128 kbit/s: y%

UL/DL 64/384

kbit/s and higher:

z%

where

u% + v% + w% +

x% + y% + z% = 100%

For EXOUa

board:

a' = a x

(u%/0.35 +

v%/0.8 +

w%/0.9 + x%/1

+ y%/1 +

z%/1)/Board specification

For

GOUc/FG2c/AT

M 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

n'

(It refers to the

number of active users

supported by the Iub

interface. )

n' = n/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'), 0)

The configuration method of the Iu-CS, Iu-PS and Iur interfaces are similar to that of the Iub

interface (without considering the NodeB).





24

For Iur interface, if there are several Iur interfaces which do not share ports with each

other, the port requirement and port specification of each interface board should be take

into account.

Redundancy Configuration for Interface Boards

The interface boards support the following backup modes:

1+1 backup mode (Double the number of required interface boards calculated based on actual network capacity.)

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

In N+1 backup mode, if Iur, Iu-CS, and Iu-PS interfaces share one board, the number of

interface boards = ROUNDIP (SUM(Iu-CS interfaces, Iu-PS interfaces, Iur interfaces),0) + 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,0)+1), ROUNDUP(IUPS,0)+1,

ROUNDUP(IUR, 0)+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.

3.1.7 Configuration Principles of Interface Boards and Service Boards

1. 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.

2. Iu interface boards in each subrack form a resource pool. A route to the core network is configured on each Iu interface board.

3. Iub interface boards in each subrack form a transmission resource pool. Routes to all the

NodeBs are configured on each Iub interface board.





25

3.1.8 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 One or two ESAUa boards and

every ESAUa boards installed in two slots.

EXOUa Evolved 10GE

Optical interface Unit

Active/standby mode

(recommended);

N+1 backup mode in the resource pool

Any universal slots





26

Board Description Redundancy Type Number of Slots

ENIUa Evolved Network

Intelligence Unit


resource pool

Any universal slots

SCUb GE Switching

network and Control 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);


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


GCGa GPS&Clock

Processing Unit


3.1.9 Auxiliary Material Configurations

Table 3-11 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





27


WP1B4PBCBN00 Cabinet Cabinet

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

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

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

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

Configuration principle of the installation material suite (QW1P0000IM00):

One installation material suite is configured for each BSC6910 cabinet (WP1B4PBCBN00).

Configuration principle of the electronic documentation (QMAI00EDOC00):

A set of electronic documentation is delivered with each BSC6910.

3.1.10 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





28

boards should be configured with more GOUc boards. The following table lists a

recommended configuration.

Subrack Number of EGPUas Number of GOUcs (pair)

MPS 3 2

EPS 1 3 2

EPS 2 3 1

EPS 3 2 1

EPS 4 2 1

EPS 5 2 1

3.2 BSC6910 GSM Configurations This section describes hardware configurations and how to calculate the number of required

licenses when the BSC6910 works in the GO mode.


Table 3-12 Cabinet configurations


QM1B0PBCDP00 Cabinet N/A

Configuration principle:

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 cabinet.

3.2.2 Subrack Configurations

Table 3-13 Subrack Configurations

Part Number Name Description Function Description

QM1K00PBCS00 Subrack Unified service

architecture basic subrack

Processes basic services.





29

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 3-14 Fixed board configurations

Board Logical Function

Description Function Description

Configuration Principle

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.

SCUb SCU GE Switching

network and

Control Unit

Provides the PS

switching and

control function.


installed in each

subrack 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:

− 8–9: EGPUa/EXPUa (Fixed)

− 10–13: EOMUa (recommended)

− 14–15: GCUa or GCGa (Fixed)

− 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.





30

3. If the customer uses Huawei Nastar, one ESAUa board is required and can be inserted in

any vacant slot, 0~1 are commended. MPS needs to reserve slots for ESAUa, 2 slots(one

ESAUa maximum) for GO, 4 slots (two ESAUa maximum) for GU.

4. The EGPUa/EXPUa boards can be inserted in any vacant slots excepting fixed slots. An

MPS can provide 16 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 advised that 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 slots. The EXOUa board is installed in only 10GE

slots(slot 16 to 19 and slots 22 to 25).

14 15 16 17 18 19 20 21 22 23 24 25 26 27

G

C

G

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G

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vic

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vic

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vic

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G

P

U

a

E

O

M

U

a

E

O

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a

0 1 2 3 4 5 6 7 8 9 10 11 12 13

EPS configuration principle:

The EPS configurations are as follows:

1. Slots 20 and 21 are reserved for the SCUb board.

2. If the customer uses Huawei Nastar, one ESAUa board is required and can be inserted in

any vacant slot.

3. The EGPUa/EXPUa boards can be inserted in any vacant slots excepting fixed slots; that is, the EPS can provide 26 slots for the EGPUa/EXPUa board.

4. Interface boards can be inserted only in slots 14 to 19 and slots 22 to 27. It is not advised that EPUa and ESAUa be inserted into these slots.

5. 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 14 to 19 and slots 22 to 27. Among them, slots 16 to 19 and 22 to 25 are preferred.





31

6. An EPS provides 26 universal slots and 12 interface board slots. The 12 interface slots

consist of 8 10GE slots and 4 GE slots. The EXOUa board is installed in only 10GE slots(slots 16 to 19 and 22 to 25).

14 15 16 17 18 19 20 21 22 23 24 25 26 27

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0 1 2 3 4 5 6 7 8 9 10 11 12 13

The number of required EPSs is calculated as follows:

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,0)

If the number of required EXOUa boards is smaller than that can be housed in an

MPS, the number of required EPSs is 0.

− 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.

− Number of required EPSs_3 = ROUNDUP [(Number of required EGPUa/EXPUa

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/EXPUa boards and interface boards is smaller than

the number of universal slots provided by the MPS, the number of required EPSs_3 is

0.

− Number of EPSs = MAX (Number of required EPSs_1, Number of required EPSs_2, Number of required EPSs_3)


Number of required EPSs = Number of EPSs required after capacity expansion – Number of EPSs configured before capacity expansion

Cabinet power consumption calculation





32

The maximum power supply a subrack is 4000 W. The maximum power consumption of a

cabinet is 7100 W.

The calculation formulas are as follows:

System power consumption = Pavg of the power consumption of all boards + Pavg of the fan

Board Pavg

Fan 200

EGPUa/EXPUa/ENIUa/EXOUa 102

GOUc/FG2c/POUc 80

GCGa/GCUa 20

SCUb 80

EOMUa/ESAUa 102

3.2.3 Hardware Capacity License Configurations and Product Specifications

The BSC6910 V100R015C00 supports the licenses for the following control items:

"BSC HW TRX Capacity (per TRX)"

"BSC HW PDCH Capacity (per PDCH)"

"Smart Service Processing Throughput (per 50Mbps)"

Hardware Description

LGMIBHTC BSC TRX Hardware Capacity (per TRX)

LGMIBHDC BSC PDCH Hardware Capacity (per PDCH)

LGW1DPIHC02 Smart Service Processing Throughput (per 50Mbps)

BSC HW TRX Capacity (per TRX)- LGMIBHTC

BSC HW TRX Capacity (per TRX) represents the number of activated TRXs, which ranges

from 0 to 24,000. The BSC calculates the number of activated TRXs after new BTSs, cells or

TRXs are added and checks whether it is greater than the number specified by the "BSC HW

TRX Capacity (per TRX)" license.

BSC HW PDCH Capacity (per PDCH)- LGMIBHDC

BSC HW PDCH Capacity (per PDCH) represents the number of activated PDCHs, which

ranges from 0 to 96,000. The number of static PDCHs is determined before BSC

configuration. The number of dynamic PDCHs is determined by the BSC. If the number of

activated PDCHs is more than the number specified by the "BSC HW PDCH Capacity (per

PDCH)" license, configuring or allocating PDCHs is not allowed.





33

Before the BSC is configured, required hardware capacity licenses must be obtained.

Smart Service Processing Throughput(per 50Mbps)- LGW1DPIHC02

Represents BSC6910 Hardware Capacity of ENIUa board.

Smart Service Processing Throughput (per 50Mbps): is the hardware capacity license of

ENIUa boards on the BSC6910. The ENIUa can enable hardware processing capability only

when "Resource-BSC6910-LGW1DPIHC02-Evolved Network Intelligence Processing

Throughput(per 50Mbps)" is loaded. Each license provides a throughput of 50 Mbit/s. The

maximum number of license files is calculated by dividing NIUa processing capability and 50

Mbit/s. The ENIUa can process DPI services on GSM and UMTS sides at one time. The

traffic carried on the NIUa board is the sum of traffic over GSM Gb interfaces and UMTS Iu

interfaces.

If the BSC6900 is replaced by a BSC6910, the BSC license cannot be used and needs to be

quoted again. However the existing BTS license can be directly used by using license

adjusting tools after the BSC6910 is used.

3.2.4 Service Boards

Table 3-15 Service boards

Board

Name Description

Function Description

Specifications

Remarks

EGP

Ua

RMP Resource


Provides the

resource

management

function.

This

function

allows the

resource

management of systems.

One pair of

boards are

configured on the

BSC.

GCUP GSM BSC

Control

plane and

User plane Processing

Processes CS and PS

services on both the

user plane and

control plane. The

processing

capability of this

board is equal to the

combined capability

of the XPU, DPUf,

and DPUg.

TRX:

1000

BTS: 600

Cell:

600

PDCH: 3000

The BHCA is

calculated based

on Huawei's

default traffic model.

GMCP GSM BSC

Mathematic

s

Calculation

Processing

Provides the IBCA

function.

N/A The number of

the GMCP board

is calculated

based on IBCA

requirements at

network deployment.





34

Board

Name Description


Specifications

Remarks

NASP Network

Assisted

Service Process

Performs network

assisted service

processing.

N/A The number of

the NASP board

is calculated

based on IBCA

requirements at

network

deployment. One

NASP board is

configured in each BSC.

EXP

Ua

RMP Resource


Provides the

resource

management

function.

This

function

allows the

resource

management of systems.

One pair of

boards are

configured on the

BSC.

GCUP GSM BSC

Control

plane and

User plane Processing

Processes CS and PS

services on both the

user plane and

control plane. The

processing

capability of this

board is equal to the

combined capability

of the XPU, DPUf,

and DPUg.

TRX:

1000

BTS:

600

Cell: 600

PDCH: 3000

The BHCA is

calculated based

on Huawei's


GMCP GSM BSC

Mathematic

s

Calculation Processing

Provides the IBCA

function.

N/A The number of

the GMCP board

is calculated

based on IBCA

requirements at

network

deployment.

ENI

Ua

NIU Evolved

Network

Intelligence Unit

Provides intelligent

service identification.

PS

throughput: 8000 Mbit/s

The ENIUa

board needs to be

configured if the

intelligent

service

identification

service is

required.





35

Board

Name Description


Specifications

Remarks

ESA

Ua

SAU Evolved

Service

Aware Unit

Provides evolved

service aware

function.

The SAU

collects,

filters, and

reports the

data from

service

boards to the Nastar.

If the customer

has purchased

the Nastar, an

SAU and one

ESAUa must be

configured on the BSC.

Configuration principle of the EGPUa/EXPUa board:

The USP on the BSC6910 has two boards, EGPUa and EXPUa. The EXPUa board is used for

GSM network only. The USP has logical functions of RMP, GCUP, GMCP, and NASP, as

shown in Table 3-15.

1. EGPUa and EXPUa boards can be used in GO and GU mode. By default, the EGPUa

board is used.

2. In UO mode, only the EGPUa board can be installed.

3. EGPUa/EXPUa configuration principle for the RMP: In GO mode, both EGPUa and

EXPUa boards can be used. By default, the EGPUa is used. In GU or UO mode, only the EGPUa board can be installed.

4. EGPUa/EXPUa configuration principle for the GMCP: In GO or GU mode, both EGPUa and EXPUa boards can be used. By default, the EGPUa is installed.

5. EGPUa/EXPUa configuration principle for the NASP: Only the EGPUa board can be

installed for the NASP.

Configuration principle of the RMP

Only one pair of RMP is installed in the MSP subrack in 1+1 backup mode for the entire

system.

Configuration principle of the GCUP board:

The BSC6900 and BSC6910 calculate the required number of service processing units in

different methods.

BSC6900: The numbers of control plane boards (XPUa and XPUb) are calculated based on

either the number of planned TRXs or the BHCA. The numbers of PS user plane boards

(DPUd and DPUg) are calculated based on the number of planned PDCHs. The numbers of

CS user plane boards (DPUc and DPUf) are calculated based on the predicted traffic.

BSC6910: The control plane board and user plane board are integrated on the GCUP board.

The number of GCUP boards is calculated as follows: Divide the site specifications and the

predicted specifications separately by the number of TRXs, number of PDCHs, BHCA, or

traffic. The maximum number among the obtained four numbers is the number of GCUP

boards.





36

Table 3-16 GCUP board specifications

TRX 1000

Cell 600

BTS 600

Traffic 6250 6.25 Erl per TRX

PDCH 3000 3 PDCHs per TRX

PS throughput 300 Mbit/s 3000 x 100 kbit/s, EGRPS2A

Equivalent BHCA 2,200,000 Calculated based on the actual benchmark

weight, including the PS throughput.

The BHCA is calculated based on Huawei's


The number of standby GCUP boards can be manually configured (recommended redundancy

mode: N+1). By default, no standby GCUP board is configured. A minimum of two GCPU

boards are configured.

1. Based on the number of TRXs

The number of required EGPUa boards =

ROUNDUP(TotalTRXNo/TRXNoPerEGPUa,0) – Existing number of EGPUa boards +

1

2. On the CS user plane Erlang

The number of required EGPUa boards =

ROUNDUP(TotalVoiceErl/VoiceErlPerEGPUa,0) – Existing number of EGPUa boards + 1

3. On the PS user plane PDCH Number

The number of required EGPUa boards = ROUNDUP(TotalPDCH/PDCHPerEGPUa,0) – Existing number of EGPUa boards + 1

4. On signal plane

The number of required EGPUa boards = ROUNDUP(TotalBHCA/BHCAPerEGPUa,0)

– Existing number of EGPUa boards + 1

5. On Cell Number

The number of required EGPUa boards = ROUNDUP(TotalCellNo/CellNoPerEGPUa,0) – Existing number of EGPUa boards + 1

6. On BTS Number

The number of required EGPUa boards = ROUNDUP(TotalBTSNo/BTSNoPerEGPUa,0) – Existing number of EGPUa boards + 1

7. The total number of required EGPUa boards equals the maximum number of the proceeding three numbers.

Configuration principle of the GMCP board:

The GMCP board is configured based on IBCA requirements at network deployment. If the

IBCA function is enabled, the number of NASP boards depends on the number of carriers that

have enabled the IBCA. Generally, one GMCP boards supports 2048 carriers. The BSC6910

RAN15.0 supports a maximum of 4096 carriers with the IBCA function. The GMCP board





37

uses N+1 redundancy mode. The total number of GMCP boards is calculated using the

following formula:

Number of required GMCP boards + ROUNDUP (TotalTRXNo/2048,0) + 1

Configuration principle of the NASP board:

The NASP board is configured based on Cellular-Aided Wi-Fi Detection and Selection

requirements at network deployment. If the function is enabled, one NASP board is

configured in each BSC.

Configuration principle of the ENIUa board:

The ENIUa board needs to be configured if the intelligent service identification service is

required. If the function is enabled, one ENIUa board is configured in each BSC.

Configuration principle of the ESAUa:

If the customer has purchased the Nastar, an SAU and one ESAUa must be configured on the

BSC.


The BSC6910 supports FE electrical ports, GE optical ports and 10GE optical ports in IP

networking, and supports channelized STM-1 ports in TDM networking.

Table 3-17 Interface boards

Part Number Name Description Interfaces

WP1D000FG201 FG2c IP Interface Unit (12 FE/4

GE, Electric)

IP: A/Abis/Lb/Gb/Iur-g

WP1D000GOU01 GOUc IP Interface Unit (4 GE,

Optical)


QM1D00EXOU00 EXOUa Evolved 10GE Optical

interface Unit


WP1D000POU01 POUc TDM or IP Interface Unit

(4 STM-1, Channelized)

TDM: Abis

IP over STM-1：Abis

Table 3-18 Interface board specifications

Part Number

Transmission Type

Port Type Port No.

TRX A CIC (64K)

Ater CIC (16K)

Gb Throughput (Mbit/s)

WP1D0

00FG201 (FG2c)

IP FE/GE

electrical port

12/4 2048 23,040 N/A 2000

WP1D0

00GOU0

1

IP GE optical

port

4 2048 23,040 N/A 2000





38

Part Number

Transmission Type

Port Type Port No.

TRX A CIC (64K)

Ater CIC (16K)

Gb Throughput (Mbit/s)

(GOUc)

QM1D0

0EXOU

00

(EXOUa)

IP 10GE

optical port

2 8000 75,000 N/A 8000

WP1D0

00POU0

1

(POUc)

TDM CSTM-1

port

4 1024 N/A N/A N/A

IP IP CSTM-1 4 2048 NA NA NA

Configuration principle of interface boards:

The total number of required interface boards equals the sum of interface boards

required on each interface. Interface boards work in 1+1 active/standby mode. The

BSC6910 does not support the BM/TC separated mode and therefore does not have the Ater

interface. The A, Gb, and Abis interfaces must be configured on the BM side. It is

recommended to configure the A, Gb, and Abis interfaces on different interface boards.

1. Calculation of Abis interface boards

Select the types of interface board based on the network plan. The number of required

Abis interface boards is calculated based on either the service capability (number of

supported TRXs) or number of required ports. The number of required Abis interface boards is the larger one of the two values.

Number of Abis interface boards = 2 x ROUNDUP (MAX (Number of TRXs in a

transmission mode/Number of TRXs supported by the interface board, Number of

ports in a transmission mode/Number of ports supported by the interface boards), 0)

Configuration precautions:

In Abis TDM networking, the BSC6910 supports only the POUc board (TDM over

STM-1). If a TDM over E1/T1 link is used for the transmission to the BSC over Abis

interfaces, the TDM over E1/T1 must be converted to a TDM over STM-1 link by using

a device that performs optical-to-electrical conversion, for example, Huawei optical switch node (OSN) products.

If the BTS provides IP over E1 links, the BSC provides IP transmission links, and the

transmission equipment provides Abis interfaces for IP over E1 links, only GE interface

boards FG2c or GOUc, instead of the 10GE interface board EXOUa, can be configured on the BSC 6910.

2. Calculation of A interface boards

Select the types of interface board based on the network plan. The number of A interface boards is calculated based on the service capability (number of supported CICs).

Number of A interface boards = 2 x ROUNDUP (ACICNumber/Number of CICs

supported by an A interface board, 0)





39

3. Calculation of Gb interface boards

Select the types of interface board based on the network plan. The number of Gb

interface boards is calculated based on the service capability (bandwidth).

Number of Gb interface boards = 2 x ROUNDUP (Gb Throughput/BSC data flow over Gb interface supported by the interface board, 0)

4. Calculation of total interface boards

Number of interface boards = Number of Abis interface boards + Number of A interface boards + Number of Gb interface boards

5. Calculation of total interface boards when multi interface sharing INT board

For GSM every interface has it’s INT board exclusive by default. And it is not recommended to multi interface sharing one INT board for reasons below:

1)The ralationship between Abis INT board and BTS are fixed. So it is not

recommended for Abis to sharing INT board with other interface.

2)Multi interface sharing INT board only applys to small capacity BSC.

Calculation of total interface boards when multi interface sharing INT board:

Number of Interface board = 2*RoundUp(Number of Abis Interface board + Number of A Interface board + Number of Gb Interface board, 0)

Number of Abis Interface board = MAX (Number of TRXs in a transmission mode/

Number of TRXs supported by the interface board, Number of ports in a

transmission mode/Number of ports supported by the interface boards)

Number of A Interface board = ACICNumber/Number of CICs supported by an A

interface board

Number of Gb Interface board = GbThroughput/BSC data flow over Gb interface supported by the interface board

3.2.6 General Principles for Slot Configurations

Services of TRXs connected to interface boards in a subrack are preferentially processed by

service processing units in the same subrack. If the resources required by a subrack exceed the

specified threshold, load sharing is implemented between subracks of the BSC. The purpose is

to reduce resources used for inter-subrack switching. Boards are configured according to the

following principles:

Interface boards and service processing units should be distributed as evenly as possible

among subracks. This reduces the consumption of processor resources and switching

resources by inter-subrack switching. Interface boards can be configured only in rear

slots, and service processing units can be configured in front or rear slots. It is

recommended that service processing units be configured in front slots. Under a BSC, A

interface boards, Abis interface boards, and service processing units must be distributed

as evenly as possible among subracks. Configuring the same type of board in the same

subrack lowers system reliability.

You do not have to specify the subrack and slot number for configuring M3UA links.

The number of MSUA links are equal to (recommended) or larger than the number of EGPUa or EXPUa boards.

General principles of board configuration:

The basic principles during network plan and design do not change by devices. The basic principles include but not limited to the following:





40

− Each LAC can receive more than 120 paging requests per second over the Um

interface when a single CCCH is configured. Therefore, it is recommended to

configure 512 TRXs for each LAC in the case of a single CCCH. The TRX number can be adjusted by traffic.

− Consecutive PDCHs are configured so that uses can use multiple consecutive slots.

− Other basic principles during GSM network plan

General principles for slot restrictions: The GCUa/GCGa, EOMUa, SCUb, and RMP

boards are inserted in fixed slots. The interface boards and service boards can be inserted in slots within specific range. For details, see the subrack configurations part.

3.2.7 Auxiliary Material Configurations

Table 3-19 Auxiliary materials

Part Number Name Description

QW1P0STMOM00 STM-1 Optical Connector STM-1optical module

QW1P00GEOM00 GE Optical Connector GE optical module

QM1P00GEOM01 10GE Optical Connector 10GE optical module

QW1P0FIBER00 Optical Fiber Optical fiber

QW1P0000IM00 Installation Material Package Installation material suite

QMAI00EDOC00 Documentation Electronic documentation

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 OIUa boards + Number of POUc boards x 4

Configuration principle of GE optical modules (QW1P00GEOM00):

The GE optical modules are fully configured for active and standby optical interface boards.

Number of GE optical modules = Number of GOUc boards (WP1D000GOU01) x 4

Configuration principle of 10GE optical modules (QW1P00GEOM01):

The 10GE optical modules are fully configured on optical interface boards.

Number of 10GE optical modules = Number of QM1D00EXOU00 x 2

Configuration principle of the optical fibers (QW1P0FIBER00):

Number of optical fibers = (Number of STM-1 optical ports + Number of GE optical ports +

Number of 10GE optical ports) x 2

Configuration principle of the installation material suite (QW1P0000IM00):

One installation material suite is configured for each BSC6910 cabinet (WP1B4PBCBN00).

Configuration principle of the electronic documentation (QMAI00EDOC00):

A set of electronic documentation is delivered with each BSC6910.





41

3.3 BSC6910 GU Product Configurations Table 3-20 describes the hardware configuration principles of the BSC6910 GU.

Table 3-20 Hardware configuration principles of the BSC6910 GU

BSC6900 GU Hardware Configuration Principles

GSM boards and UMTS boards should not be configured in the same subrack.

One to three GSM subracks can be configured. One to five UMTS subracks can be configured.

The total number of GSM and UMTS subracks should be smaller than or equal to six.

Number of cabinets = ROUNDUP[(Number of GSM subracks + Number of UMTS

subracks)/3]. A maximum of two cabinets (excluding the cabinets housing TC subracks) can be configured.

The GSM network does not support ATDM and has no BM/TC separated configuration mode.

In GU mode, ENIUa boards processing the DPI function are separately configured on the GSM and UMTS networks.

One ESAUa board can be configured in the BSC6910 GU mode.

The preceding principles apply to BSC6910 GU deployment and capacity expansion.

The procedure for configuring a newly deployed BSC6910 GU is as follows:

1. Obtain the GSM and UMTS network parameter values.

2. Perform dimensioning to obtain the GSM and UMTS network requirements respectively.

3. Calculate the UMTS configuration and GSM configuration based on the network requirements.

If the capacity required by the GSM configuration and UMTS configuration does not exceed

the BSC6910 GU specifications (that is, the total number of GSM subracks and UMTS

subrack does not exceed six), then configuration calculation is complete. If the total required

capacity exceeds the maximum specifications of one BSC6910 GU or the number of slots

required for the interface boards exceeds the limitation, an extra BSC6910 GU needs to be

added.

3.4 Examples of Typical Configurations

3.4.1 BSC6910 UMTS

The procedure of typical configuration can be carried out as follow steps.

Requirement Input

Operator provides the network requirement which should include the information as listed in

below table.





42

Table 3-21 Network specifications

Total subscribers 889,000

Total NodeBs 1200

Total cells 3000

PS throughput (Including R99 and HSPA, UL+DL) per PS sub in BH (bps) 4500

Voice traffic per CS voice sub in BH(Erl) 0.02

CS voice call duration (sec.) 75

Handover times per CS call 8

CS voice call per sub per BH 0.96

PS call per sub per BH 2

CS Proportion of SHO for CS call 1.3

Handover times per PS call 5

PS call duration (sec) 52

NAS (Attach, Detach, LAU, RAU) and SMS per sub per BH 3.6

PS proportion of SHO for PS call 1

PS channel switch times per PS call 0

Ratio of duration time in active state to online state 100%

Iub interface type 10GE

Iu/Iur interface type 10GE

Ratio of traffic over Iur interfaces to Iub interfaces 0%

Enable the IN service identification Yes

ESAUa for the Nastar No

GPS support No

NOTE

Active state include CELL_DCH&CELL_FACH state

Online state includes CELL_DCH&CELL_FACH &CELL_PCH&URA_PCH state

Assume that the PS data traffic types consist of the followings:

UL/DL 8/8 kbit/s: 0%

UL/DL 8/32 kbit/s: 0%

UL/DL 64/64 kbit/s: 70%

UL/DL 64/128 kbit/s: 25%

UL/DL 64/384 kbit/s and higher: 5%

Calculate the number of control plane boards, user plane boards, and interface boards.





43

By dimension procedure, the requirement of operator can be described as following:

1. Total throughput requirement (based on sample input, the value is 4000 Mbit/s)

2. Total CS Erl requirement (based on sample input, the value is 24,850 Erl)

3. Total BHCA requirement (based on sample input, the value is 2,631,000)

4. Total NodeB quantity requirement (based on sample input, the value is 1200)

5. Total cell quantity requirement (based on sample input, the value is 3000)

6. Total active users requirement (based on sample input, the value is 43,460)

7. Total Iub CID/UDP requirement (based on sample input, the value is 112,606); Total

Iu-CS CID/UDP requirement (based on sample input, the value is 17,780); Total Iu-PS GTPU requirement (based on sample input, the value is 25,680);

8. Total interface connections boards requirement (based on sample input, the value is 4)

Hardware Configuration and Capacity License Configurations (Using HW6910 R15 Hardware)

1. Number of EGPUa boards required for the user plane

Item Description Calculation of the Board Quantity

Iub PS

throughput

PS throughput over the Iub

interface

a' = 4000 x (0%/0.11 + 0%/0.31+

0%/0.38 + 75%/0.53 + 20%/0.66 + 5%/1)/2000 = 6998/2000

Iub CS traffic CS traffic over the Iub interface b' = 24,850/10,050

Iub active users Number of active users

supported by the Iub interface

n' = 43,460/28,000

Cell quantity Number of cells managed by the

RNC

c' = 3000/1400

N_EGPUa_UP = max(a' + b', c', n') = 45.79

The number of licenses required for "RNC Throughput HW Capacity License (per 50 Mbit/s)" is calculated as follows:

N_EGPUa_Iub_License = ROUNDUP(((4000 + 24850 x 24.4/1000)/50 Mbit/s), 0) = 93

2. Number of EGPUa boards required for the control plane


BHCA

requirement

BHCA required by

the network

Assume that the BHCA in

this traffic model is x.

b' = b/x =

2631000/1000000

control plane

active users

Number of active

users supported on the control plane

N/A n' = n/35000 =

43460/35000

NodeB quantity

Number of NodeBs

managed by the

N/A nb' = nb/700 = 1200/700





44


RNC

Cell quantity Number of cells

managed by the RNC

N/A c' = c/1400 =

3000/1400

N_EGPUa_CP = max(b', n', nb', c') = 2.6

The number of licenses required for "RNC Active User HW Capacity License" is calculated as follows:

N_EGPUa_ ActiveUser_License = ROUNDUP(43460/1000, 0) = 44

One EGPUa board can be used on the CP and UP at one time. The EGPUa board is in N+1 backup mode. In this case,

N_EGPUa = ROUNDUP((N_EGPUa_CP + N_EGPUa_UP), 0) +1 = 10

NOTE N_EGPUa does not include the fixed N_EGPUa boards for resource management.

3. Number of required EXOUa boards

Item Value Calculation of Board Quantity

Iub Iub transmission

type

10GE Optical (IP)

Iub PS throughput ba = 4000 ba' = ba x (u%/0.11 + v%/0.31 +

w%/0.38 + x%/0.56 + y%/0.76 +

z%/1)/Board specification = 4000 x

(0%/0.11+0%/0.31+ 0%/0.38 +

75%/0.56 + 20%/0.76 + 5%/1)/10000 = 6998/10000

Iub CS traffic bb = 24850 bb' = bb/Board specification = 24850/75000

NodeB quantity bn = 1200 bn' = bn/Board specification =

1200/1500

Iu-CS Iu-CS transmission

type

10GE Optical (IP)

Iu-CS CS Traffic cb = 24850/1.3 cb' = cb/Board specification =

24850/1.3/75000

Iu-CS active users cu = 17780 cu' = cu/Board specification =

17780/500000

Iu-PS Iu-PS transmission

type

10GE Optical (IP)

Iu-PS throughput pb = 4000/1 pb' = pb x (0%/0.7 + 0%/1 + 0% / 1

+ 75% / 1 + 20% / 1 + 5% /





45

Item Value Calculation of Board Quantity

1)/Board specification =

4000/1/10000

Iu-PS online users pu = 25680 pu' = pu/Board specification =

25680/500000

In view of the that Iub, Iu-CS, and Iu-PS interface boards are configured separately and are in N+1 backup mode, the number of required interface boards is as follows:

− N_IUB_IF = ROUNDUP(MAX(ba’+bb’, bn’, bu’), 0) +1 = 2

− N_IUCS_IF = ROUNDUP(MAX(cb’, cu’)), 0) + 1= 2

− N_IUPS_IF = ROUNDUP(MAX(pb’, pu’), 0) +1= 2

− N_EXOUa = N_IUB_IF + N_IUCS_IF + N_IUPS_IF = 6

4. Number of required EPS boards (QM1P00UEPS01)

If:

Number of interface boards ≤ 8

Number of EGPUa boards ≤ 18

Number of interface boards and EGPUa boards ≤ 18

Then, one MPS is sufficient.

5. Number of required cabinets (WP1B4PBCBN00)

Number of cabinets = 1

In summary, the following table lists the configurations that can meet network requirements.

Item Name For Short Part Number Quantity

1 Cabinet N/A WP1B4PBCBN00 1

2 Main processing subrack MPS QM1P00UMPS01 1

3 Extended processing

subrack

EPS QM1P00UEPS01 0

4 Clock board GCU WP1D000GCU01 1

5 Evolved General

Processing Unit for User Plane

GPU QM1D00EGPU00 8

6 RNC Throughput HW

Capacity License (per 50

Mbit/s)

N/A QM1SRTHWCL00 93

7 RNC Active User HW

Capacity License (per 1000 active users)

N/A QM1SRAUHCL00 44

8 Evolved 10GE Optical

interface Unit

EXOUa QM1D00EXOU00 6





46

3.4.2 BSC6910 GSM

The procedure of typical configuration can be carried out as follow steps.

Requirement Input

Operator provides the network requirement which should include the information as listed in

below figure.

Here give a sample, the input information is as follows:

Parameter Value

voice traffic /sub/BH (Erlang) 0.02

voice call duration (seconds) 60

SMS/LA setup duration(seconds) 0





47

Parameter Value

percent of Mobile originated calls 50%

percent of Mobile terminated calls 50%

average LUs/sub/BH 1.2

average IMSI Attach/sub/BH 0.15

average IMSI Detach/sub/BH 0.15

average MOCs/sub/BH 0.6

average MTCs/sub/BH 0.6

MR report/sub/BH 144

average MO-SMSs /sub/BH 0.6

average MT-SMSs /sub/BH 1

average intra-BSC HOs /sub/BH 1.1

average inter-BSC HOs /sub/BH 0.1

paging retransfer /sub/BH 0.56

Grade of Service (GoS) on Um interface 0.01

Grade of Service (GoS) on A interface 0.001

percent of HR (percent of Um interface resources occupied by

HR voice call) 50%

Dimension

The following figure shows the dimensions that are used for calculating the configurations.





48

Item Name Specifications

1 TRX support capacity A1

2 Abis GE QTY A2

3 A CIC QTY A3

4 IWF QTY A4

5 BHCA A5

6 Gb data flow A6

7 PDCH QTY A7

Network capacity

Get the Network Capacity requirement to calculate the hardware requirement.

Item Name Configuration Before Capacity Expansion

1 Subracks (MPS and EPS) B1

2 Evolved General Processing Unit (EGPUa)

or Evolved Extensible Processing Unit

(EXPUa)

B2

3 Interface board B3

4 Cabinet B4


Configuration Principle 4 Expansion and Upgrade Configurations



49

4 Expansion and Upgrade Configurations

4.1 BSC6910 UMTS

The service processing capability of the BSC6910 improves by adding the hardware.

Capacity expansion follows the minimum hardware configuration principle.

4.1.1 Hardware Expansion and Upgrade Configurations

Table 4-1 Boards of the BSC6910 V100R015C00

Hardware Version Boards

HW6910 R15 SCUb, GCGa, GCUa, AOUc, UOIc, FG2c, GOUc, EGPUa,

EXOUa, EOMUa, ESAUa, ENIUa

Table 4-2 List of the hardware components to be added (HW6910 RAN15.0 hardware)


Configuration After Capacity Expansion

Added Quantity

1 Cabinet A1 B1 B1 – A1

2 MPS A2 B2 B2 – A2

3 EPS A3 B3 B3 – A3

4 Clock board A4 B4 B4 – A4

5 Evolved General

Processing Unit (for Control Plane)

A5 B5 B5 – A5

6 Evolved General

Processing Unit (for

User Plane)

A6 B6 B6 – A6

7 Interface boards A7 B7 B7 – A7





50

NOTE A1 through A7 and B1 through B7 indicate the number of components.

4.1.2 Examples of Hardware Expansion

Before capacity expansion, the network configurations are as follows:

Traffic: 10,050 Erl

Transmission rate: 2000 Mbit/s (based on the uplink and downlink transmission rates 64 kbit/s and 384 kbit/s)

BHCA: 1,668,000 (using the Smartphone traffic model)

Number of NodeBs: 700

Number of cells: 1400

IP transmission (10GE optical port) over the Iub, Iu-CS, and Iu-PS interfaces

Iub, Iu-CS, and Iu-PS interface boards working in 1+1 active/standby mode

After capacity expansion, the network configurations are as follows:

Traffic: 20,100 Erl

Transmission rate: 4000 Mbit/s (based on the uplink and downlink transmission rates 64 kbit/s and 384 kbit/s)

BHCA: 3,336,000 (using the Smartphone traffic model)

Number of NodeBs: 1400

Number of cells: 2800

IP transmission (10GE optical port) over the Iub, Iu-CS, and Iu-PS interfaces

Iub, Iu-CS, and Iu-PS interface boards working in 1+1 active/standby mode

Table 4-3 lists the hardware configurations before and after capacity expansion. The numbers

of hardware components to be added are calculated according to the procedure described in

section 3.1.2 "Subrack Configurations."

Table 4-3 Capacity expansion from configuration 1 to configuration 2

Configuration

Number of Cabinets

Number of Subracks

Number of EGPUa boards for the User Plane

Number of EGPUa Boards for the Control Plane

Number of EXOUa Boards

Configurati

on 1

(before

capacity expansion)

1 1 2 1 6

Configurati

on 2 (after

capacity

expansion)

1 1 4 2 6

Number of

components to be added

0 0 2 1 0





51

The slot configurations are as follows:

NOTE It is recommended that boards be evenly distributed in every subrack, following the related configuration principles.

4.2 BSC6910 GSM Capacity expansion can be performed through the following methods:

Improving the service processing capability of the system through hardware expansion

Improving the service processing capability of the system by configuring capacity licenses

The two methods can be adopted separately or together according to the requirements of

network services. Follow the minimum hardware configuration principle during capacity

expansion.

4.2.1 Precautions

The BSC6900 cannot be upgraded to the BSC6910 by upgrading the software, but can be

upgraded by migrating the hardware. If the BSC6900 is upgraded to BSC6910, the BSC

license of BSC6900 can be used for the BSC 6910 after the license is quoted again. However

the BTS license of the BSC6900 that has been quoted can be directly used for the BSC6910

by using license adjusting tools.

The BSC6910 supports only the SCUb, EOMUa, ESAUa, GCUa, GCGa, EGPUa/EXPUa,

FG2c, GOUc, EXOUa, and POUc boards.

The EGPUa/EXPUa board used in the BSC6910 replaces the XPUb, DPUf (for A interfaces

using IP transmission), and DPUg boards used in BSC6900.

In the BSC6910 V100R015C00, the Ater and Pb interfaces are removed from the transmission

network. The Abis interface supports IP and TDM transmission modes, whereas other external

interfaces only support IP transmission mode.





52

Part Number

Name Remarks

WP1D000F

G201

FG2c 1. Number of required A interface boards = 2 x ROUNDUP

((MaxACICPerBSCIP – Number of FG2c boards

functioning as the A interface board/2 x ACICPerFG2c)/ACICPerFG2c), 0)

NOTE

The number of required A interface boards depends on the number of ports and the number of equivalent CIC circuits on the A interface. In

capacity expansion scenarios, the capacity specifications and number of ports supported by the existing FG2c boards must be subtracted from the total required capacity.

2. Number of required Abis interface boards = 2 x

ROUNDUP ((MAX (ROUNDUP

(AbisIPFEGENo/GEPortPerFG2c, 0) x

GEPortPerFG2c-Number of FG2c boards functioning as the

Abis interface board/2 x GEPortPerFG2c)/GEPortPerFG2c,

(TRXNoFEGE -Number of FG2c boards functioning as the

Abis interface board/2 x

TRXNoPerFG2c)/TRXNoPerFG2c), 0)

NOTE

When the Abis interface uses IP transmission, the Abis interface boards must be configured. The number of required Abis interface boards depends on the number of FE/GE ports and the number of TRXs. In capacity expansion scenarios, the originally supported TRXs must be subtracted from the total required TRXs. In addition, the number of ports supported before capacity expansion should also be considered.

3. Number of required Gb interface boards = 2 x

ROUNDUP((MAX(ROUNDUP(MAX(GbIPFEGENo/GEP

ortPerFG2c, 0) x GEPortPerFG2c –Number of FG2c boards

functioning as the Gb interface board/2 x

GEPortPerFG2c)/GEPortPerFG2c),

(GbIPTputPerBSC-Number of FG2c boards functioning as

the Gb interface board/2 x (GbTputPerFG2c/1024))/GbTputPerFG2c/1024), 0)

NOTE

When the built-in PCU is used, Gb interface boards must be configured. The number of required Gb interface boards depends on the number of ports and the traffic on the Gb interface. The originally supported traffic must be subtracted from the total supported traffic.

4. The number of FG2c boards to be configured is equal to the total number of all the preceding boards.

WP1D000

GOU01

GOUc The GOUc has different interface from the FG2c but has the

same service capacity, number of GE ports, GE port

specifications, and configuration formulas.

QM1D00E

XOU00

EXOUa EXOUa functioning as the interface board before capacity

expansion

1. Number of required A interface boards = 2 x ROUNDUP

(MAX ((TotalAIP10GENo – Number of EXOUa boards

functioning as A interface board/2 x

10GEPortPerEXOUa)/10GEPortPerEXOUa, (TotalAIPCIC





53

Part Number

Name Remarks

– Number of EXOUa boards functioning as A interface

board/2 x AIPCICPerEXOUa)/AIPCICPerEXOUa), 0)

NOTE

The quantity depends on the number of ports and the number of equivalent CIC circuits on the A interface. In capacity expansion scenarios, the capacity specifications and number of ports supported by the existing EXOUa boards must be subtracted from the total required capacity.

2. Number of required Abis interface boards = 2 x

ROUNDUP (MAX ((TotalAbisIP10GENo – Number of

EXOUa boards functioning as Abis interface board/2 x

10GEPortPerEXOUa)/10GEPortPerEXOUa,

(TotalTRXNo10GE – Number of EXOUa boards

functioning as Abis interface board/2 x TRXNoPerEXOUa)/TRXNoPerEXOUa), 0)

NOTE

The quantity depends on the number of ports and the number of TRXs on the Abis interface. In capacity expansion scenarios, the originally

supported TRXs must be subtracted from the total required TRXs. In addition, the number of ports supported before capacity expansion should also be considered.

3. Number of required Gb interface boards = 2 x ROUNDUP

(MAX ((TotalGbIP10GENo – Number of EXOUa boards

functioning as Gb interface board/2 x

10GEPortPerEXOUa)/10GEPortPerEXOUa,

(TotalGbIPTput – Number of EXOUa boards functioning

as Gb interface board/2 x GbTputPerEXOUa)/GbTputPerEXOUa), 0)

NOTE

The quantity depends on the number of ports and the traffic on the Gb interface. The originally supported traffic must be subtracted from the total supported traffic.

4. The number of EXOUa boards to be configured is equal to the total number of all the preceding boards.

FG2c or GOUc functioning as the interface board before

capacity expansion (The calculation principle for GOUc is

the same as that for FG2c.)

1. Number of required A interface boards = 2 x ROUNDUP

(MAX (((TotalAIPCIC – Number of FG2c boards

functioning as A interface board/2 x

AIPCICPerFG2c)/AIPCICPerEXOUa), 0)

NOTE

The quantity depends on the number of ports and the number of equivalent CIC circuits on the A interface. In capacity expansion scenarios, the capacity specifications and number of ports supported by the existing FG2c or GOUc boards must be subtracted from the total required capacity.

2. Number of required Abis interface boards = 2 x ROUNDUP (MAX ((TotalTRXNo – Number of FG2c





54

Part Number

Name Remarks

boards functioning as Abis interface board/2 x

TRXNoPerFG2c)/TRXNoPerEXOUa), 0)

NOTE

The quantity depends on the number of ports and the number of TRXs on the Abis interface. In capacity expansion scenarios, the originally supported TRXs must be subtracted from the total required TRXs.

3. Number of required Gb interface boards = 2 x ROUNDUP

(MAX ((TotalGbIPTput – Number of FG2c boards

functioning as Gb interface board/2 x GbTputPerFG2c)/GbTputPerEXOUa), 0)

NOTE

The quantity depends on the number of ports and the traffic on the Gb interface. The originally supported traffic must be subtracted from the total supported traffic.

4. The number of EXOUa boards to be configured is equal to the total number of all the preceding boards.

WP1D000P

OU01

POUc 1.Number of required Abis interface boards (TDM) = 2 x

ROUNDUP (MAX ((TotalAbisTDMSTM1No – Number of

POUc boards functioning as Abis interface board/2 x

STM1PortPerPOUc)/ STM1PortPerPOUc, (TotalTRXNo –

Number of POUc boards functioning as Abis interface board/2

x TRXNoPerPOUc)/TRXNoPerPOUc), 0)

2. Number of required Abis interface boards (IP)

=2*ROUNDUP ( MAX( (TotalAbisIPSTM1No - Number of

POUc boards functioning as Abis interface board /2*

STM1PortPerPOUc)/ STM1PortPerPOUc, (TotalTRXNo-

Number of POUc boards functioning as Abis interface board /2* TRXPerPOUcIP)/ TRXPerPOUcIP,0)

NOTE

The quantity depends on the number of ports and the number of TRXs on the Abis interface. Each BTS must be configured with at least one E1 port by default. If the BTSs are cascaded on the live network, only the BTS at the highest level is connected to an E1 port on the BSC.





55

Part Number

Name Remarks

QM1D00E

GPU00

EGPUa 1. Calculating the number of required EGPUa based on the

number of TRXs:

Number of required EGPUa boards = ROUNDUP

(TotalTRXNo/TRXNoPerEGPUa, 0) – Number of existing EGPUa boards + 1

2. Calculating the number of required EGPUa based on the traffic in the CS services:


(TotalVoiceErl/VoiceErlPerEGPUa, 0) – Number of existing EGPUa boards + 1

3. Calculating the number of required EGPUa based on the number of PDCHs in the PS services:


(TotalPDCH/PDCHPerEGPUa, 0) – Number of existing

EGPUa boards + 1

4. The number of EGPUa boards to be configured is equal to the maximum value of all the preceding boards.

QM1D00E

XPU00

EXPUa Same as EGPUa

GMIPEPR

ACK00

GEPS Number of processing subracks = ROUNDUP(MAX(Total

number of interface boards – 10/14, (Total number of interface

boards + Total number of user plane boards – 18)/24, 0))

QM1B0PB

CBN00

Cabinet 1

4.2.2 Hardware Capacity License Expansion

Before hardware capacity expansion, sufficient hardware capacity licenses for "BSC HW

TRX Capacity (per TRX)" and "BSC HW PDCH Capacity (per PDCH)" must be obtained.

The number of licenses to be increased depends on the difference in TRX or PDCH capacity

before and after capacity expansion.

4.2.3 Examples of Hardware Expansion

Total Replacement

An operator may want to increase equipment integration and achieve a larger capacity with

existing cabinets and subracks. In this case, a total replacement is recommended.

In a total replacement, the capacity is considered first. The Unistar quotation template is used

to work out a BSC equipment list based on the specifications of the new hardware version.

The boards required for the capacity expansion are determined through a comparison with

existing boards that can be reused. Boards that cannot be reused must be removed.

The procedure for a total replacement is as follows:





56

Step 1 Fill in the Unistar calculation table and calculate the configuration required after the capacity

expansion.

Step 2 Record the board and equipment configurations before the capacity expansion.

Step 3 The components required in the capacity expansion are the components after the capacity

expansion minus those before the capacity expansion.


Configuration After Capacity Expansion

Number of Components to Be Added

1 Subracks

(MPS, EPS)

A1 B1 B1 – A1

2 Evolved

General

Processing

Unit (600

TRXs)

A2 B2 B2 – A2

3 Interface

boards

A3 B3 B3 – A3

4 Cabinets A4 B4 B4 – A4

----End

Incremental Algorithm

If an operator wants to keep the original equipment without large-scale modifications to the

legacy network, new boards are used only for newly added sites and carriers. If the new

quotation template does not support mixed insertion of boards and the frontline personnel

want to simplify operations, use the original quotation template and the incremental

algorithm.

The core idea is to reuse as much legacy equipment as possible.

The purpose of mixed insertion is to use boards of different specifications in the same logical

or physical interface.

The procedure for the incremental algorithm is as follows:

Step 1 Fill in the Unistar calculation table with the quotation parameters of the new hardware version

after the capacity expansion. By doing this, you get the configuration required after the

capacity expansion. In the Dimension Calculator window, you can view the capacity after

the capacity expansion.

Step 2 Fill in the Unistar calculation table with the quotation parameters of the original hardware

version before the capacity expansion. By doing this, you can obtain the configurations of

each interface board before the capacity expansion. In the Dimension Calculator window,

you can view the capacity before the capacity expansion.

Step 3 Subtract the hardware support capability before the capacity expansion from the capacity

required after the expansion. By doing this, you can obtain the capacity support capability

required for the expansion.





57

NOTE Generally, the traffic volume over the Gb interface is light. One pair of boards can cope even during a capacity expansion. Therefore, set the capacity increase on the Gb interface to 0.

Item Name Configuration Required After the Capacity Expansion

Maximum Support Capability Before the Capacity Expansion

Increased Support Capability Required by the Capacity Expansion

1 TRX support

capability

A1 B1 B1 - A1

2 Abis QTY A2 B2 B2 - A2

3 A CIC QTY A3 B3 B3 - A3

4 BHCA A5 B5 B5 - A5

5 Gb interface

traffic

A6 A6 B6 - A6

... ... ... ...

Step 4 Determine the boards required by the capacity expansion.

Process the initial result about the required hardware based on the configuration principle.

Step 5 Calculate whether additional cabinets, subracks, and auxiliary materials are required for the

capacity expansion.

----End


Configuration Principle 5 Appendix



58

5 Appendix

5.1 Traffic Model

5.1.1 UMTS Traffic Model

The BSC6910 UMTS supports the flexible configuration of control plane and user plane data

in different scenarios. In each scenario, the capacity configured for the BSC6910 UMTS

depends on actual traffic models.

There are 2 traffic models for the BSC6910 UMTS:

High-PS traffic model

This model is applicable in scenarios where subscribers use much more data services than voice services. In this model, the average PS throughput per user is high.

Traffic model for mart phones

In this model, control plane signaling is frequently exchanged and user plane data is transmitted mainly through small packets.

The capacity under UMTS BSC6910 typical configurations in the high-PS traffic model, and

smartphones traffic model are described as follows.

High-PS Traffic Model

Table 5-1 High-PS traffic model for the BSC6910 UMTS (per user in busy hours)

Item Specification Description

CS voice traffic

volume

3 mE AMR speech service, 0.144 BHCA

CS data traffic

volume

0.2 mE UL 64 kbit/s/DL 64 kbit/s CS data service,

0.0053 BHCA

PS throughput 43500 bit/s UL 64 kbit/s/DL 384 kbit/s, 3 BHCA

Proportion of soft

handovers

30% Proportion of calls using two channels

simultaneously to all calls

Handover times per

CS call (SHO)

8 Average number of handovers per CS call





59


(times/call)

Handover times per

PS call (SHO) (times/call)

5 Average number of handovers per CS call

NAS signaling per

subscriber per BH (times)

3.6 Including all CN-UE signaling: LA update, RA

update, IMSI attach/detach, and GPRS attach/detach

Iur traffic 8% The amount of Iub traffic(in percent) that is

directed to another RNC

Table 6-1 lists the capacity of the BSC6910 UMTS in typical configurations (one cabinet that

has three subracks installed and 2 cabinets with six subracks installed). In this table, the

BSC6910 UMTS uses the high-PS traffic model.

Table 5-2 Capacity of the BSC6910 UMTS in typical High-PS configurations

Number of Subscribers Supported

CS Voice Service Capacity (Erlang)

PS Service Capacity (Iub UL+DL) (Mbit/s)

BHCA (k)

BHCA (k) (Include SMS)

Active User

s

Subrack Combination

1,380,000 5,700 59,500 4,300 5,600 153000 1 MPS + 2

EPSs

2,760,000 11,400 120,000 8,600 11,400 307000 1 MPS + 5

EPSs

NOTE

1. The CS voice service capacity, PS service capacity, and BHCA can reach the maximum at the same

time.

2. Active Users include users in CELL_DCH and CELL_FACH state.

Smartphone Traffic Model

Table 5-3 Smartphone traffic model for the BSC6910 UMTS


CS voice traffic volume 2.55 mE AMR speech service, 0.5507 BHCA

CS data traffic volume 0 mE UL 64 kbit/s/DL 64 kbit/s CS data service, 0

BHCA

PS throughput 1197.6 bit/s UL/DL 0.8 kbit/s / 5.12 kbit/s, 7.86440

BHCA

Proportion of soft 34% Proportion of calls using two channels





60


handovers simultaneously to all calls

Handover times per CS

call (SHO) (times/call)

10.621 Average number of handovers per CS call

Handover times per PS

call (SHO) (times/call)

0.7426 Average number of handovers per CS call

NAS signaling per

subscriber per BH (times)

2.0344 Including all CN-UE signaling: LA update,

RA update, IMSI attach/detach, GPRS attach/detach, and SMS

Iur traffic 8% The amount of Iub traffic(in percent) that is

directed to another RNC

Table 6-3 lists the capacity of the BSC6910 UMTS in typical configurations. In this table, the

BSC6910 UMTS uses the traffic model for smart phones.

Table 5-4 Capacity of the BSC6910 UMTS in typical smartphone configurations

Number of Users Supported

CS Voice Service Capacity (Erlang)

PS Service Capacity (Iub UL+DL) (Mbit/s)

BHCA (k)

BHCA (k) (Include SMS)

Active

Users Subrack Combination

3,830,000 124,000 4,500 31,900 34,900 724000 1 MPS + 2

EPSs

7,660,000 250,000 9,100 64,000 70,000 1450000 1 MPS + 5

EPSs

NOTE

1. The CS voice service capacity, PS service capacity, and BHCA can reach the maximum at the same

time.

2. Active Users include users in CELL_DCH and CELL_FACH state.

5.1.2 GSM Traffic Model

Parameter Value

voice traffic /sub/BH (Erlang) 0.02

voice call duration (seconds) 60

percent of Mobile originated calls 50%

percent of Mobile terminated calls 50%

average LUs/sub/BH 1.2

average IMSI Attach/sub/BH 0.15





61

Parameter Value

average IMSI Detach/sub/BH 0.15

average MOCs/sub/BH 0.6

average MTCs/sub/BH 0.6

MR report/sub/BH 144

average MO-SMSs /sub/BH 0.6

average MT-SMSs /sub/BH 1

average intra-BSC HOs /sub/BH 1.1

average inter-BSC HOs /sub/BH 0.1

paging retransfer /sub/BH 0.56

Grade of Service (GoS) on Um interface 0.01

Grade of Service (GoS) on A interface 0.001

percent of HR (percent of Um interface resources occupied by HR

voice call)

50%

Uplink TBF Est & Rel / Second/TRX 1.75

Downlink TBD Est & Rel / Second/TRX 0.9

PS Paging / Sub/BH 1.25

5.2 Hardware Specification

5.2.1 UMTS

Parameter Name

Meaning Specifications

Board

BHCAPerEGPUa

CP

BHCA supported by each EGPUa

CP Only board

1,668,000 EGPUa CP

Only

NodebPerEGPUa

CP

Number of NodeBs supported by

each EGPUa CP Only board

700 EGPUa CP

Only

CellPerEGPUaC

P

Number of cells supported by each

EGPUa CP Only board

1400 EGPUa CP

Only

ActiveUserPerEG

PUaCP

Number of active users supported

by each EGPUa CP Only board

35,000 EGPUa CP

Only

OnlineUserPerE

GPUaCP

Number of online users supported

by each EGPUa CP Only board

70,000 EGPUa CP

Only





62

Parameter Name


Board

CellPerEGPUaU

P

Number of cells supported by each

EGPUa UP Only board

1400 EGPUa UP

Only

ErlPerEGPUaUP Traffic (Erl) supported by each EGPUa UP Only board

10,050 EGPUa UP Only

PSThtPerEGPUa

UP64_384

PS throughput (Mbit/s) supported

by each EGPUa UP Only board

(based on a service rate of 64 kbit/s

in the uplink and 384 kbit/s in the downlink)

2000 EGPUa UP

Only

PSThtPerEGPUa

UP64_128





1520 EGPUa UP

Only

PSThtPerEGPUa

UP64_64





1120 EGPUa UP

Only

PSThtPerEGPUa

UP32_32





760 EGPUa UP

Only

PSThtPerEGPUa

UP8_32





620 EGPUa UP

Only

PSThtPerEGPUa

UP8_8





220 EGPUa UP

Only

ActiveUsersPerE

GPUaUP

Number of active users supported


28,000 EGPUa UP

Only

MaxInterSubrack

SwitchSCUb

Inter-subrack switching capability

(Gbit/s) of each pair of SCUb boards

40 SCUb

NodebPerGOUc/

NodebPerFG2c

Number of NodeBs supported by

each GOUc or FG2c board

500 GOUc/FG2c

ErlPerGOUc/

ErlPerFG2c

Traffic (Erl) supported by each

GOUc or FG2c board

18,000 GOUc/FG2c





63

Parameter Name


Board

IubPsThrPerGOU

cFG2c_64_384

PS UL/DL/UL+DL throughput

(Mbit/s) supported by the GOUc or

FG2c board functioning as the Iub

interface board (based on 64K/384K, >420/420 Bytes)

2600

GOUc/FG2c

IubPsThrPerGOU

cFG2c_64_128/





2600

GOUc/FG2c

IubPsThrPerGOU

cFG2c_64_64




interface board(based on 64K/64K, >420/420 Bytes)

2600

GOUc/FG2c

IubPsThrPerGOU

cFG2c_32_32





2600

GOUc/FG2c

IubPsThrPerGOU

cFG2c_8_32




interface board (based on 8 K/32K, 110/420 Bytes)

2600

GOUc/FG2c

IubPsThrPerGOU

cFG2c_8_8




interface board (based on 8K/8K, 84/84 Bytes)

2600

GOUc/FG2c

IuPsThrPerGOUc

FG2c_64_384



FG2c board functioning as the Iu

interface board (based on 64K/384K, >920/920Bytes)

3200

GOUc/FG2c

IuPsThrPerGOUc

FG2c_64_128





3200

GOUc/FG2c

IuPsThrPerGOUc

FG2c_64_64





3200

GOUc/FG2c





64

Parameter Name


Board

IuPsThrPerGOUc

FG2c_32_32





3200

GOUc/FG2c

IuPsThrPerGOUc

FG2c_8_32




interface board (based on 8K/32K, 220/940Bytes)

3200

GOUc/FG2c

IuPsThrPerGOUc

FG2c_8_8




interface board (bsed on 8K/8K, 220/220Bytes)

3200

GOUc/FG2c

NodebPerEXOUa Number of NodeBs supported by

each EXOUa board

1500 EXOUa

ErlPerEXOUa Traffic (Erl) supported by each EXOUa board

75,000 EXOUa

IuPsThrPerEXO

Ua_64_384


(Mbit/s) supported by the EXOUa

board functioning as the Iu


10000

EXOUa

IuPsThrPerEXO

Ua_64_128





10000

EXOUa

IuPsThrPerEXO

Ua_64_64





10000

EXOUa

IuPsThrPerEXO

Ua_32_32





10000

EXOUa

IuPsThrPerEXO

Ua_8_32





10000

EXOUa





65

Parameter Name


Board

IuPsThrPerEXO

Ua_8_8





7000

EXOUa

IubUlPsThrPerE

XOUa_64_384

PS UL throughput (Mbit/s)

supported by the EXOUa board

functioning as the Iub interface

board (UL/DL 64/384 kbit/s, 168/504 bytes)

10000 EXOUa

IubPsThrPerEXO

Ua_64_128/



board functioning as the Iub


10000

EXOUa

IubPsThrPerEXO

Ua_64_64




interface board(based on 64K/64K, >420/420 Bytes)

10000

EXOUa

IubPsThrPerEXO

Ua_32_32





9000

EXOUa

IubPsThrPerEXO

Ua_8_32




interface board (based on 8 K/32K, 110/420 Bytes)

8000

EXOUa

IubPsThrPerEXO

Ua_8_8




interface board (based on 8K/8K, 84/84 Bytes)

3500

EXOUa

NodebPerAOUc Number of NodeBs supported by

each AOUc board

500 AOUc

ErlPerAOUc Traffic (Erl) supported by each AOUc board

18,000 AOUc

IubUlPsThrPerA

OUc


supported by the AOUc board

functioning as the Iub interface board

300 AOUc





66

Parameter Name


Board

IubDlPsThrPerA

OUc

PS DL throughput (Mbit/s)



300 AOUc

IubUlDlPsThrPer

AOUc

PS DL and UL throughput (Mbit/s)



board

600 AOUc

IuUlPsThrPerAO

Uc



functioning as the Iu interface board

350 AOUc

IuDlPsThrPerAOUc




350 AOUc

IuUlDlPsThrPer

AOUc



functioning as the Iu interface

board

700 AOUc

NodebPerUOIc Number of NodeBs supported by

each UOIc board

500 UOIc

ErlPerUOIc Traffic (Erl) supported by each

UOIc board

18,000 UOIc

IubUlPsThrPerU

OIc


supported by the UOIc board


board

800 UOIc

IubDlPsThrPerU

OIc




800 UOIc

IubUlDlPsThrPer

UOIc




1200 UOIc

IuUlPsThrPerUO

Ic



functioning as the Iu interface

board

900 UOIc

IuDlPsThrPerUO

Ic




900 UOIc





67

Parameter Name


Board

IuUlDlPsThrPer

UOIc




1800 UOIc

PortNumGOUc/P

ortNumFG2c

The port numbers supported by

GOUc/FG2c 4

GOUc/FG2c

PortNumEXOUa The port numbers supported by

EXOUa 2

EXOUa

Stm1PortNumAO

Uc

The STM-1 port numbers

supported by AOUc 4

AOUc

Stm1PortNumUO

Ic

The STM-1 port numbers

supported by UOIc 8

UOIc

5.2.2 GSM

Board Specifications

Parameter Name


Board

TrxPerEGP

Ua

Number of TRXs supported by each pair of

EGPUa/EXPUa boards

1000 EGPUa/EXPUa

BHCAPer

EGPUa

BHCA supported by each pair of

EGPUa/EXPUa boards

1,800,000 EGPUa/EXPUa

ErlPerEGP

Ua

Traffic (Erl) supported by each pair of

EGPUa/EXPUa boards

5000 EGPUa/EXPUa

PDCHNoP

erEGPUa

Number of PDCHs supported by each

EGPUa/EXPUa board

3000 EGPUa/EXPUa

10GEPortP

erEXOUa

Number of 10GE ports supported by the

EXOUa board

2 EXOUa

TRXNoPer

EXOUa

Number of TRXs supported by the EXOUa

board over the Abis interface in IP transmission mode

8000 EXOUa

ACICPerE

XOUa

Number of CICs supported by the EXOUa

board over the A interface in IP

transmission mode

75000 EXOUa

GbTputPer

EXOUa

Throughput (Mbit/s) supported by the

EXOUa board over the Gb interface in IP transmission mode

8000 EXOUa

GEPortPer Number of GE ports supported by the 4 FG2c





68

Parameter Name


Board

FG2c FG2c board

FEPortPer

FG2c

Number of FE ports supported by the FG2c

board

12 FG2c

GEPortPer

GOUc

Number of GE ports supported by the

GOUc board

4 GOUc

GbTputPer

FG2c

Throughput (Mbit/s) supported by the

FG2c or GOUc board over the Gb interface in IP transmission mode

2000 FG2c/GOUc

TRXNoPer

FG2c

Number of TRXs supported by the FG2c or

GOUc board over the Abis interface in IP transmission mode

2048 FG2c/GOUc

ACICPerF

G2c

Number of CICs supported by the FG2c or

GOUc board over the A interface in IP

transmission mode

23,040 FG2c/GOUc

LogicalPor

tPerFG2c

Number of logical ports supported by the

FG2c or GOUc board in IP transmission mode

512 FG2c/GOUc

STM1Port

PerPOUc

Number of STM-1 ports supported by the

POUc board

4 POUc

TRXHRPe

rPOUcTD

M

Number of TRXs supported by the POUc

board in TDM transmission mode

1024 POUc:TDM

TRXPerPO

UcIP

Number of TRXs supported by the POUc

board in IP transmission mode 2048 POUc:IP

MaxInterS

ubrackIPSwitch

Maximum switching capability between

subracks of the BSC

40 Gbit/s BSC

Board Usage

Each type of board on the BSC6910 has its specifications, which are calculated by

collectively considering the capacity on various aspects (including BHCA capacity, TRX

capacity, CIC capacity, and bandwidth capacity). The specifications for a board indicate the

capacity for a board running with long-term stability.

When a board is processing services, its bandwidth capacity, service parsing and forwarding

capacity, and signaling parsing and forwarding capacity must be taken into consideration.

Therefore, Huawei uses the board usage to represent the board capacity.

Board usage = Traffic volume on the BSC/Maximum board specification

For example:





69

The specification of the GOUc board over the A interface is 23040 CICs, and the number of

serving CICs is 10000. Therefore, the board usage is 43.4% (10000/23040 x 100%).


Configuration Principle 6 Acronyms and Abbreviations



70

6 Acronyms and Abbreviations

Table A-1 Acronyms and abbreviations

Acronym and Abbreviation

Full Name

ATM Asynchronous Transfer Mode

CN Core Network

CP Control Plane

EPS Extension process subrack

GPS Global Positioning System

Iu Interface between RNC and CN

Iub Interface between RNC and NodeB

Iur Interface between RNC and RNC

MPS Main process subrack

NodeB Base station in WCDMA networks

RNC Radio Network Controller

UP User Plane

bsc6910 configuraion principle (v100r015c00_02)(pdf)-en

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