hlr9820 system description

Technical Manual - System DescriptionHUAWEI HLR9820 Home Location Register Table of Contents

Table of Contents

Chapter 1 Introduction to HLR9820...........................................................................................1-1

1.1 About This Chapter..........................................................................................................1-1

1.2 Position of the HLR9820 in GSM/UMTS Network............................................................1-1

1.3 Interfaces of HLR9820.....................................................................................................1-2

1.4 Functions of HLR9820.....................................................................................................1-2

1.4.1 Overview of HLR9820 Functions...........................................................................1-2

1.4.2 Functions as an HLR.............................................................................................1-2

1.4.3 Functions as an AuC.............................................................................................1-3

Chapter 2 Key Benefits...............................................................................................................2-1

2.1 Overview of key benefits..................................................................................................2-1

2.2 Compatibility with GSM and UMTS Networks..................................................................2-1

2.3 Modular Design................................................................................................................2-1

2.4 High Reliability.................................................................................................................2-1

2.5 High Security.................................................................................................................... 2-1

2.6 Open Interfaces...............................................................................................................2-2

2.7 Smooth Upgrade..............................................................................................................2-2

2.8 Large Capacity.................................................................................................................2-2

2.9 Rich Services and Functions............................................................................................2-2

2.10 Powerful O&M System...................................................................................................2-3

2.10.1 Overview of O&M System...................................................................................2-3

2.10.2 Diversified Management Methods.......................................................................2-3

2.10.3 User-friendly Graphic Interface............................................................................2-3

2.10.4 Tracing Functions................................................................................................2-3

2.10.5 Customized Performance Measurement Functions.............................................2-4

2.10.6 Remote Management..........................................................................................2-4

2.10.7 Real-time Fault Management..............................................................................2-4

2.10.8 Rich Online Help..................................................................................................2-4

Chapter 3 System Architecture..................................................................................................3-1

3.1 About This Chapter..........................................................................................................3-1

3.2 Physical Structure of HLR9820........................................................................................3-1

3.2.1 Overview of HLR9820 Physical Structure..............................................................3-1

3.2.2 Structure of Single-cabinet HLR9820....................................................................3-1

3.2.3 Structure of Dual-cabinet HLR9820.......................................................................3-2

3.3 Functional Structure of HLR9820.....................................................................................3-4

3.3.1 Overview of HLR9820 Functional Structure..........................................................3-4

3.3.2 SAU....................................................................................................................... 3-5

Huawei Technologies Proprietary

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3.3.3 HDU....................................................................................................................... 3-5

3.3.4 SMU...................................................................................................................... 3-5

3.3.5 BAM....................................................................................................................... 3-6

Chapter 4 Services and Functions.............................................................................................4-1

4.1 Overview of HLR9820 Services.......................................................................................4-1

4.2 Teleservices.....................................................................................................................4-1

4.3 Supplementary Services..................................................................................................4-1

4.4 Operator Determined Barring...........................................................................................4-3

4.5 Bearer Services...............................................................................................................4-3

4.6 GPRS Services................................................................................................................4-4

4.7 IN Services....................................................................................................................... 4-5

4.8 Location Services.............................................................................................................4-5

4.9 NAEA Services................................................................................................................4-6

4.10 NLR Function................................................................................................................. 4-6

4.11 Redundancy Function....................................................................................................4-6

Chapter 5 Operation and Maintenance......................................................................................5-1

5.1 Overview of O&M Functions............................................................................................5-1

5.2 System Operation............................................................................................................5-1

5.2.1 Overview of System Operation..............................................................................5-1

5.2.2 Data Configuration Management...........................................................................5-1

5.2.3 Subscriber Data Management...............................................................................5-1

5.2.4 Performance Management....................................................................................5-2

5.2.5 Automatic Database Backup.................................................................................5-2

5.3 System Maintenance.......................................................................................................5-2

5.3.1 Overview of System Maintenance.........................................................................5-2

5.3.2 Alarm Functions.....................................................................................................5-3

5.3.3 NE Maintenance Functions...................................................................................5-3

5.3.4 Test Functions.......................................................................................................5-3

5.3.5 Tracing Functions..................................................................................................5-3

5.3.6 Log Functions........................................................................................................5-3

5.4 Remote Maintenance.......................................................................................................5-4

Chapter 6 Reliability....................................................................................................................6-1

6.1 Overview of HLR9820 Reliability......................................................................................6-1

6.2 Hardware Reliability.........................................................................................................6-1

6.2.1 Overview of Hardware Reliability...........................................................................6-1

6.2.2 Exception Protection..............................................................................................6-1

6.2.3 Redundancy and Backup Design..........................................................................6-1

6.2.4 Flow Control..........................................................................................................6-2

6.2.5 Reliable Power Supply..........................................................................................6-2

6.3 Software Reliability..........................................................................................................6-2

6.3.1 Overview of Software Reliability............................................................................6-2


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6.3.2 Automatic Fault Detection and Self-healing Ability................................................6-2

6.3.3 Data Security.........................................................................................................6-3

6.3.4 Operation Security.................................................................................................6-3

Chapter 7 Technical Specifications...........................................................................................7-1

7.1 Overview of Technical Specifications...............................................................................7-1

7.2 System Performance.......................................................................................................7-1

7.3 Reliability Specifications..................................................................................................7-1

7.4 Physical and Electrical Specifications..............................................................................7-2

7.5 Clock Specifications.........................................................................................................7-2

7.6 Environment Requirements..............................................................................................7-4

7.6.1 Storage Environment.............................................................................................7-4

7.6.2 Transportation Environment..................................................................................7-7

7.6.3 Operation Environment..........................................................................................7-9

7.7 Compliant Safety Standards..........................................................................................7-11

Chapter 8 Installation and Expansion........................................................................................8-1

8.1 System Installation...........................................................................................................8-1

8.2 System Expansion and Upgrade......................................................................................8-1


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Technical Manual - System DescriptionHUAWEI HLR9820 Home Location Register Chapter 8 Introduction to HLR9820

Chapter 1 Introduction to HLR9820

1.1 About This Chapter

This chapter introduces:

The position of the HLR9820 in GSM and UMTS network.

The interfaces related to the HLR9820.

The functions of the HLR9820 as an HLR and as an authentication center (AuC).

1.2 Position of the HLR9820 in GSM/UMTS Network

The HLR9820 is shared by the circuit switched (CS) domain and packet switched

(PS) domain in a UMTS system. It integrates the functions of an AuC and is

compatible with the HLRs in GSM networks.

Figure 1-1 shows the position of the HLR9820 in a GSM/UMTS network.

BS

BS

BS

BS

BS

BS

BSC

RNC

SGSN GGSN

MSC

SCP

HLR

IP Network

GSM/PSTN

Iu

Iu

Gn Gi

C/D

CAP

ISUP

GcGr

GMLC

Lg

Lh

Lg

LcJ

BS: Base station BSC: Base station controller

RNC: Radio network controller MSC: Mobile switching center

SGSN: Serving GPRS support node GGSN: Gateway GPRS support node

GMLC: Gateway mobile location center SCP: Service control node

HLR: Home location register

Figure 1-1 Position of the HLR9820 in a GSM/UMTS network


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1.3 Interfaces of HLR9820

The HLR9820 provides rich open interfaces to other network elements (NEs). Table

1-1 lists the interfaces associated with the HLR9820.

Table 1-1 Functional interfaces associated with the HLR9820

Interface Connected element Type of physical interface

C MSC, GMSC, SMC E1/IP

D VLR E1/IP

Gr SGSN E1/IP

Gc GGSN E1/IP

J gsmSCF E1/IP

Lh GMLC E1/IP

1.4 Functions of HLR9820

1.4.1 Overview of HLR9820 Functions

The HLR9820 provides the functions of an HLR and an AuC.

The HLR is a database for storing and managing subscriber and equipment

information.

The AuC is a database for storing and managing the authentication data of

subscribers.

1.4.2 Functions as an HLR

The HLR9820 provides the following HLR functions:

I. Management of Basic Subscriber Data

The HLR9820 stores the data of its home subscribers, including the information of:

Subscriber identification

Basic services

Supplementary services

Operator-determined barring (ODB)

Roaming restriction

Customized applications for mobile enhanced logic (CAMEL)

General packet radio service (GPRS)


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II. Management of Subscriber Authentication Data

At the request of a visitor location register (VLR) or a serving GPRS support node

(SGSN), the HLR9820 requests authentication parameters from AuC and provides

them to the VLR or SGSN. The HLR9820 can send 1 to 5 groups of authentication

triplets or quintuplets each time.

After sending the authentication parameters to the VLR or SGSN, the HLR9820

removes the old parameters in it. When the HLR9820 fails to obtain new

authentication parameters from the AuC in time due to faults, it can restore the old

parameters.

The HLR9820 can also convert authentication quintuplets into triplets.

III. CS Domain Mobility Management

The HLR9820 supports mobility management programs over the mobile application

part (MAP) interface for CS domain subscribers, including location updating and

cancellation.

IV. PS Domain Mobility Management

The HLR9820 supports mobility management programs over the MAP interface for

PS domain subscribers, including GPRS routing area (RA) updating and cancellation.

V. Call-related Processing

The HLR9820 supports the process of sending routing information and providing

roaming number for CS domain and PS domain mobile terminated calls.

VI. Support for ATI Operation among SCP

The HLR9820 supports any time interrogation (ATI) operations initiated by a service

control point (SCP).

Through this operation, the SCP and HLR provide the location and status of mobile

terminals.

1.4.3 Functions as an AuC

The AuC handles the security data for subscriber authentication. At the request of the

VLR or SGSN, AuC generates authentication quintuplets and sends them to the VLR

or SGSN through the HLR. Then the HLR authenticates the subscriber based on the

international mobile subscriber identity (IMSI).


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Technical Manual - System DescriptionHUAWEI HLR9820 Home Location Register Chapter 8 Key Benefits

Chapter 2 Key Benefits

2.1 Overview of key benefits

The HLR9820 boasts the following benefits:

Compatibility with GSM and UMTS Networks

Modular Design

High Reliability

High Security

Open Interfaces

Smooth Upgrade

Large Capacity

Rich Services and Functions

Powerful O&M System

2.2 Compatibility with GSM and UMTS Networks

The HLR9820 can be used in a GSM network or a UMTS network to provide GSM or

UMTS services. It can be added to an existing GSM network without the necessity of

any network modification.

2.3 Modular Design

The HLR9820 uses distributed processing structure based on modular design. It

enables the hardware structure of HLR9820 to be customized based on operator's

requirements.

Independent modules of the HLR9820 complete signaling access, service processing,

and service management functions. This endows HLR9820 with powerful processing

capability and low overhead.

2.4 High Reliability

To improve reliability, the HLR9820 uses the following techniques:

System software and hardware backup

Data backup

Flow control mechanism

System self-healing


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2.5 High Security

The HLR9820 uses the following techniques to improve its security:

Protection against viruses, hackers, and other possible attacks on system

software.

Strict verification on operator identity.

Multiple authentication algorithms.

2.6 Open Interfaces

The HLR9820 provides open standard protocol interfaces. This makes

interconnection with other equipment easy and thus reduces operator's investment

cost. To realize these protocol interfaces, the HLR9820 provides various types of

physical interfaces. With these physical interfaces, operators can make full use of

their transmission resources.

The HLR9820 provides diversified physical interfaces, including:

Time division multiplexing (TDM) interfaces (64 kbit/s and 2 Mbit/s signaling

interfaces).

ATM 2 Mbit/s signaling interfaces.

Internet Protocol (IP) signaling interface.

IP network management interface.

IP business hall interface.

2.7 Smooth Upgrade

Developed based on 3rd Generation Partnership Project Release 4 (3GPP R4)

specifications, the HLR9820 can be smoothly upgraded to support 3GPP R5 by

means of software upgrade. It saves operator's potential equipment investment in the

future.

2.8 Large Capacity

To meet the requirements for future capacity expansion, the HLR9820 provides a

large capacity that can support a maximum of 2 million subscribers (or 20 million

static subscribers).

2.9 Rich Services and Functions

The HLR9820 provides rich services and functions to help operators provide various

services to subscribers.

The HLR9820 provides the following services:

Teleservices


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Bearer services

Supplementary services

Unstructured supplementary service data (USSD) services

Location services (LCS)

The HLR9820 provides the following functions:

Number location register (NLR) function

Virtual HLR function

2.10 Powerful O&M System

2.10.1 Overview of O&M System

The HLR9820 provides powerful operation and maintenance (O&M) functions,

including:

Diversified management methods

User-friendly graphic interface

Tracing functions

Customized performance measurement functions

Remote management

Real-time fault management

Rich online help

2.10.2 Diversified Management Methods

Customers can built a desired network management system based on their network

structure, management requirements, and investment scale.

Based on a Client/Server distributed processing system, the HLR9820 provides

maintenance functions that can be implemented through:

Graphic user interface (GUI) client

Centralized network maintenance interface

Man-machine language (MML)

The HLR9820 supports local and remote maintenances by multiple users at the same

time.

2.10.3 User-friendly Graphic Interface

The HLR9820 provides a friendly O&M interface built on navigation tree. The

interface features simplicity, efficiency, and convenience of MML operations, and the

visual effect of GUI.


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The O&M system provides a graphic topology view of network structure and an

equipment status panel to ease operations. Frequently used commands are available

on shortcut menus.

2.10.4 Tracing Functions

The HLR9820 provides full tracing functions, including:

Signaling tracing

Interface tracing

Subscriber tracing

Message explanation

2.10.5 Customized Performance Measurement Functions

The HLR9820 can display performance measurement data in lists and graphics. It

also supports real-time performance monitoring.

2.10.6 Remote Management

The HLR9820 supports various remote management functions, including:

Online software patching

Online debugging

Remote maintenance

Dynamic data setting

2.10.7 Real-time Fault Management

The HLR9820 can receive and display network equipment fault reports. It provides

real-time audible or visual alarms through topology view, alarm panel, alarm box,

mobile phones, and so on.

The HLR9820 also provides detailed fault reports, a fault management system with

leveled-filtering functions, rich online help, and fault removal suggestions. This

enables quicker fault location and removal.

2.10.8 Rich Online Help

The online help includes the information for MML commands, O&M system, boards,

alarm handling, and so on.


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Technical Manual - System DescriptionHUAWEI HLR9820 Home Location Register Chapter 8 System Architecture

Chapter 3 System Architecture

3.1 About This Chapter

This chapter presents the physical and functional structures of the HLR9820, followed

by an introduction to the configuration schemes based on different hardware

platforms.

This chapter consists of the following sections:

Physical Structure of HLR9820

Functional Structure of HLR9820

3.2 Physical Structure of HLR9820

3.2.1 Overview of HLR9820 Physical Structure

The HLR9820 is installed in one cabinet or two cabinets, depending on the platform

used for the HLR database unit (HDU). If the HDU uses Sun minicomputers, the

HLR9820 is installed in an N68-22 cabinet. If the HDU uses IBM minicomputers, it is

installed in a Hauwei N68-22 cabinet and an IBM T00 cabinet.

The following sections respectively describe these two structures.

3.2.2 Structure of Single-cabinet HLR9820

The HDU of single-cabinet HLR9820 uses Sun minicomputers. Figure 1-2 shows the

structure of the single-cabinet HLR9820.

Except for the computers serving as service management unit (SMU) client and the

local maintenance terminal of back administration module (BAM), all other devices

are installed in the cabinet. These devices include:

One power distribution box

Two LAN switches

One service subrack

One air deflector

One terminal concentrator (TC)

One PC server (BAM)

One keyboard, video, and mouse (KVM)

Two 3310 disk arrays

Two Netra 20/Netra 240 minicomputers


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Note:

TC is not used when a Netra240 platform is adopted for the HDU dual-system.

This single-cabinet configuration supports a maximum of 600,000 subscribers.

TC

BAM

KVM

Minicomputer 1

Minicomputer 2

Disk array 2

Fan boxAir deflector

Disk array 1

Dummy panel

Power distribution box

Service subrack

LAN Switch 1

LAN Switch 2Cabling trough

Cabling trough

Dummy panel

Dummy panel

Figure 1-2 Configuration of single-cabinet HLR9820

3.2.3 Structure of Dual-cabinet HLR9820

The HDU of dual-cabinet HLR9820 uses IBM minicomputers. Figure 1-3 shows the

structure of the dual-cabinet HLR9820.

In dual-cabinet configuration, the T00 cabinet holds:

Two P630/P650 minicomputers


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One 7133_D40 disk array

Two inverter groups

Note

Inverter groups are not needed if the minicomputer is built on the P630.

The N68-22 cabinet holds:

One power distribution box

Two LAN switches

Three service subracks

Three air deflectors

One KVM

One TC

One PC server (BAM)

This dual-cabinet configuration supports a maximum of 2,000,000 subscribers.


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Power distribtion box

Service subrack 3

Service subrack 2

Service subrack 1

TC




Minicomputer 1

Minicomputer 2

Disk array

Power distribtion boxCabling trough

LAN Switch 1

LAN Switch 2

Cabling trough

BAM

KVM

Dummy panel

Dummy panel

Inverter group 1

Inverter group 2

Figure 1-3 Configuration of dual-cabinet HLR9820

3.3 Functional Structure of HLR9820

3.3.1 Overview of HLR9820 Functional Structure

Figure 1-4 shows the functional structure of the HLR9820.


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HDU

TCP/IP

TCP/IP

LAN

IP

No.7

NSS

NSS

SMUBNH

BAMLAN

NMS

SAU

TCP/IP

NSS ATM 2M

SAU: Signaling access unit HDU: HLR database unit

BAM: Back administration module SMU: Service management unit

NMS: Network management system BNH: Business hall

Figure 1-4 Functional structure of the HLR9820

Functionally, the HLR9820 consists of:

Signaling access unit (SAU)

HLR database unit (HDU)

Service management unit (SMU)

Back administration module (BAM)

3.3.2 SAU

The SAU fulfills the following functions:

Access IP network or signaling system No.7 (SS7) network.

Receive messages sent to the HLR9820 from other network entities.

Send messages from the HLR9820 to other network entities.

3.3.3 HDU

The HDU manages subscription data and subscriber authentication data.

The HDU and SAU exchange information in Server/Client mode, with HDU as the

server and SAU as the client.

The SMU and HDU exchange information in Server/Client mode, with SMU as the

server and HDU as the client.

The SAU and SMU do not exchange information directly with each other.

3.3.4 SMU

The SMU manages the subscriber data in the HLR9820.


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The SMU also provides interfaces to business halls for connecting programs

developed by third parties.

3.3.5 BAM

The BAM provides management functions for the SAU, HDU, and SMU, such as:

Alarm processing

Performance management

Equipment status management

The BAM also provides interfaces to network management system (NMS) for

centralized management and maintenance.

SMU software and BAM software are usually installed on one PC.


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Technical Manual - System DescriptionHUAWEI HLR9820 Home Location Register Chapter 8 Services and Functions

Chapter 4 Services and Functions

4.1 Overview of HLR9820 Services

The HLR9820 provides the follow services:

Teleservices

Supplementary Services

Operator Determined Barring

Bearer Services

GPRS Services

IN Services

Location Services

NAEA Services

NLR Function

Redundancy Function

4.2 Teleservices

Table 1-1 lists the teleservices supported by the HLR9820.

Table 1-1 Teleservices supported by the HLR9820

Type Service

Speech service Telephony service

Emergency call

Short message

service

Short message mobile terminated/point-to-point (MT/PP)

Short message mobile originated/point-to-point (MO/PP)

Facsimile serviceAlternate speech and G3 facsimile

Automatic G3 facsimile

4.3 Supplementary Services

The HLR9820 provides functions such as the authorization, application, and

operations of supplementary services.

Table 1-2 lists the supplementary services supported by the HLR9820.


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Table 1-2 Supplementary services supported by the HLR9820

Type Service

Number identification

Calling line identification presentation (CLIP)

Calling line identification restriction (CLIR)

Connected line identification presentation (COLP)

Connected line identification restriction (COLR)

Override calling line identification restriction (OVER-

CLIR)

Override called line identification restriction (OVER-

COLR).

Call forwarding

Call forwarding unconditional (CFU)

Call forwarding on mobile subscriber busy (CFB)

Call forwarding on no reply (CFNRy)

Call forwarding on mobile subscriber not reachable

(CFNRc)

Call forwarding default (CFD)

Call completionCall waiting (CW)

Call hold (CH)

Multi-call Multiparty service (MPTY)

ChargingAdvice of charge - information (AOCI)

Advice of charge - charging (AOCC)

Call barring

Barring of all outgoing calls (BAOC)

Barring of outgoing international calls (BOIC)

Barring of outgoing international calls except those

directed to the home PLMN country (BOIC-exHC)

Barring of all incoming calls (BAIC)

Barring of incoming calls when roaming outside the

home PLMN country (BAIC-Roam)


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Unstructured

supplementary service

data (USSD)

USSD

Call transfer Explicit call transfer (ECT)

Closed user group (CUG) Closed user group

Customized

supplementary servicesCustomized supplementary services

4.4 Operator Determined Barring

Table 1-3 lists the operator determined barring (ODB) services supported by the

HLR9820.

Table 1-3 ODB services supported by the HLR9820

Type Service

Barring of outgoing calls

Barring of outgoing calls (BOC)

Barring of outgoing international calls (BOIC)

Barring of outgoing international calls except those

directed to the home PLMN country (BOIC-exHC)

Barring of outgoing calls when roaming outside the

home PLMN country (BOIC-Roam)

Barring of incoming calls

Barring of incoming calls (BIC)

Barring of incoming calls when roaming outside

the home PLMN country

Barring of roaming

Barring of roaming outside the home PLMN

Barring of roaming outside the Home PLMN

country

Barring of outgoing premium

rate calls

Barring of outgoing premium rate calls

(information)

Barring of outgoing premium rate calls

(entertainment)

Operator specific barring (type 1)



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When registered in the

HPLMN, operator specific



Barring of supplementary

service management

Barring of supplementary services management,

which prevents subscriber control of any

supplementary service (registration, de-

registration, activation, de-activation, user

invocation, interrogation, password registration,

and mobile initiated USSD)

4.5 Bearer Services

Bearer services provide information transmission capacity, especially the low-layer

capacity, in the networks (between access points).

Generally, the communication link between access points handles the information

transmission. The communication link spans over different networks, such as Internet,

Intranets, local area networks (LANs), and asynchronous transfer mode (ATM)

transmission network, and controls the bearer in a network-specific mode. Each

network is closely related to the end-to-end quality of service (QoS) used by terminal

users.

Bearer services include circuit switched (CS) services and packet switched (PS)

services (that is, GPRS services).

Table 1-4 lists the CS bearer services supported by the HLR9820.

Table 1-4 CS bearer services supported by the HLR9820

Type Service

Asynchronous circuit data

General asynchronous bearer service

300 bit/s duplex circuit data

1,200 bit/s duplex circuit data

1,200/75 bit/s duplex circuit data

2,400/bit/s duplex circuit data




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Synchronous circuit data




9,600bit/s duplex circuit data

PDA access service

300 bit/s PAD access data

1,200 bit/s PAD access data

1,200/75 bit/s PAD access data




Multimedia service Multimedia service in the CS domain

Voice group serviceVoice group call service (VGCS)

Voice broadcast service (VBS)

4.6 GPRS Services

The HLR9820 provides the following functions related to GPRS services:

Coordinate with the SGSN and GGSN to complete burst data transmission.

Provide data bearer capability up to 2 Mbit/s.

Enable GPRS subscribers to access a public land mobile network (PLMN) and

external data network efficiently.

Provide point-to-point and point-to-multipoint application data transmission

channels between subscribers.

4.7 IN Services

A CAMEL network enables subscribers to use operator-tailored services.

A CAMEL subscriber may have one or several CAMEL subscription information (CSI)

elements. The CSIs are provided by the home PLMN operator and determined by the

subscription profile.

A CAMEL subscriber can subscribe to the following CSIs:

Originating CAMEL subscription information (O-CSI).

Terminating CAMEL subscription information (T-CSI).

VMSC terminating CAMEL subscription information (VT-CSI).


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Supplementary service invocation notification CAMEL subscription information

(SS-CSI).

Translation information flag CAMEL subscription information (TIF-CSI).

USSD CAMEL subscription Information (U-CSI).

USSD general CAMEL subscription information (UG-CSI).

Short message service CAMEL subscription information (SMS-CSI).

GPRS CAMEL subscription information (GPRS-CSI).

Mobility management CAMEL subscription information (M-CSI).

Dialled services CAMEL subscription information (D-CSI).

4.8 Location Services

Location service (LCS) is a location-related service provided by a wireless network

operator with the help of special techniques in locating the position (longitude and

latitude) of a MS.

Location services consist of CS location services and PS location services.

Through LCS, operators can provide such applications:

Vehicle management

Location-based traffic information

Urban SOS

Localized advertising

Emergency service

Vehicle tracking

Fleet management

City guide

Location-dependent content broadcast

Mobile yellow pages

4.9 NAEA Services

North America Equal Access (NAEA) service allows subscribers to have free choice

for routing toll calls over the networks of operators in a country. This helps create a

fair competition environment.

Each operator is assigned a carrier identity code (CIC). A subscriber can preset the

CIC for routing toll calls when registering this service, or dial the CIC when making toll

calls.

In preset mode, calls are routed over the network or the preset CIC. The subscriber,

however, can still select a non-preset operator by dialing the operator's CIC.

If a subscriber does not dial or preset a CIC, calls are connected to the toll call

network set by the operator by default.


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Mobile subscribers of this service cover common subscribers but do not include

international roaming subscribers. In a terminated call, the subscriber cannot choose

the operator.

The NAEA service is not applicable to IN calls and CF calls.

4.10 NLR Function

The number location register (NLR) enables operators to provide 3G services to GSM

subscribers without reconstructing the existing GSM network. To operators, they only

need to add Huawei HLR equipment (the HLR equipment added depends on the

number of 3G subscribers to be supported) in GSM networks. To GSM subscribers,

they do not have to bother with the problem of changing their MSISDNs.

The NLR can simplify network deployment and accelerate upgrades. It is a cost-

effective solution that can slash the operating and capital cost of operators and help

operators provide new, high-margin services.

4.11 Redundancy Function

Because the HLR saves the subscription data of mobile subscribers, if fault occurs to

the HLR, the operators and end users will suffer loss. The redundancy mechanism

adopted in Huawei HLR can avoid or minimize the loss of operators and end users

caused by HLR failure.

Huawei HLR provides four redundancy solutions for different network structures:

1+1 load-share redundancy solution

In this solution, two Huawei HLRs work in the mutual backup mode. That is, one

HLR backs up the data of the other to ensure data consistency. If one HLR fails,

the other HLR takes over the subscriber data handled by the faulty HLR.

1+1 mated redundancy solution

In this solution, two Huawei HLRs work in the active and standby mode. The

standby HLR backs up the data of the active HLR on a real-time basis. If the

active HLR fails, the standby HLR will handle the subscriber data of the active

HLR.

N+1 mated redundancy solution

In this solution, all the HLRs must be Huawei product. "N" stands for N active

HLRs, and "1" for a disaster-recovery HLR.

The disaster-recovery HLR backs up the data of N active HLRs on a real-time

basis. The real-time backup means that the disaster-recovery HLR can back up

the dynamic data of all the subscribers. If one or several active HLRs fail, the

disaster-recovery HLR will handle the subscriber data of the faulty HLR(s)

without interrupting the service of any subscriber.


7


N+1 compatibility redundancy solution

In this solution, only the disaster-recovery HLR is provided by Huawei. The N

active HLRs can be provided by different vendors.

In normal condition, the disaster-recovery HLR backs up the data of N active

HLRs. If one or several active HLRs fail, the disaster-recovery HLR will handle

the data of the faulty HLR(s).

Because the HLRs are from different vendors, the disaster-recovery HLR cannot

back up the dynamic data of subscribers.


8

Technical Manual - System DescriptionHUAWEI HLR9820 Home Location Register Chapter 8 Operation and Maintenance

Chapter 5 Operation and Maintenance

5.1 Overview of O&M Functions

The operation and maintenance (O&M) system of the HLR9820 fulfills the following

functions:

Centralized network management

Local maintenance

Remote maintenance

This chapter introduces the O&M functions of the HLR9820 with respect to the

following aspects:

System Operation

System Maintenance

Remote Maintenance

5.2 System Operation

5.2.1 Overview of System Operation

System operations of the HLR9820 includes:

Data Configuration Management

Subscriber Data Management

Performance Management

Automatic Database Backup

5.2.2 Data Configuration Management

The data configuration management features:

Easy-to-use MML interface with predictive text input function

Strict user authority defining the operation scope of each level

Reasonable task assignment for the purpose of flexible operations

Local maintenance or remote centralized maintenance

Online data modification and loading with affecting services

5.2.3 Subscriber Data Management

The management of subscriber data involves the subscription information in the HLR

and the authentication data in the AuC.

For subscriber data management, the HLR9820 provides:


1


Easy-to-use MML operation interface with predictive text input function.

Convenient service addition, modification, and deletion functions.

Operation log function that provides detailed operation history.

Interfaces to business halls.

5.2.4 Performance Management

HLR9820 provides the following performance measurement functions:

Customized measurement report and customized measurement entity.

Three measurement time-segments a day with measurement day designated by

month or by week, and measurement cycle ranging from 1 minute to 24 hours.

Concise report that supports customized grouping of measurement entities.

You can select any desired measurement entities in the same measurement type

to output reports. If the measurement objects are the same, you can select the

measurement entities in the same function type of different measurement types

to output reports.

Customized measurement entities.

Customers can define measurement entities through arithmetic expressions

based on existing indexes. The operand of the arithmetic expression can be a

constant, measurement cycle, or a measurement entity of the HLR9820.

Real-time measurement.

The calls and traffic are scanned and measured on a real-time basis.

Standard and open output format, with printing function available.

Measurement result output interface for further development, such as opening of

raw data.

Dedicated performance measurement analysis tools such as for analyzing call

completion rate, congestion, call drops, handoffs, and traffic density.

5.2.5 Automatic Database Backup

The HLR9820 automatically backs up subscriber data from disk arrays to local hard

disks or tapes of the dual system.

5.3 System Maintenance

5.3.1 Overview of System Maintenance

The system maintenance functions of the HLR9820 include:

Alarm Functions

NE Maintenance Functions

Test Functions


2


Tracing Functions

Log Functions.

5.3.2 Alarm Functions

The HLR9820 provides an alarm management system that can:

Collect alarm information upon alarm occurrence or alarm clearance.

Classify alarm information and send them to the BAM according to their priority

levels.

Display detailed descriptions and removal suggestions of alarms on graphical

interfaces through the BAM alarm console.

5.3.3 NE Maintenance Functions

NE maintenance functions of the HLR9820 include:

Monitoring the status of a link, a timeslot or a board of a functional unit

Tracing messages over the standard interfaces of the system

Remote maintenance to the equipment

5.3.4 Test Functions

The following test functions of the HLR9820 include:

Providing a test interface for connecting test instruments without affecting the

normal operation of the equipment.

System-level routine tests on boards, interface circuits, and so on.

Diagnosing hardware and software failures automatically and removing faults

accordingly.

Allowing users to output, edit, and handle test and diagnostic results

conveniently.

5.3.5 Tracing Functions

HLR9820 delivers powerful subscriber and signaling tracing functions that can be

fulfilled without any additional signaling test device. Subscriber and signaling tracing

help locate faults.

The tracing functions include:

Message tracing on standard interfaces and message storage.

Explanation of traced signaling messages.

Subscriber message tracing based on international mobile subscriber identity /

mobile station international ISDN number (IMSI/MSISDN) on standard interfaces

and message storage.

Explanation for traced subscriber messages.


3


5.3.6 Log Functions

The HLR9820 provides:

Complete user operation logs and equipment running logs.

Friendly and easy-to-use output interfaces for logs, with detailed online help

Viewable log information.

Explanation and analysis for non-viewable information.

Filtering of test and debug information in the logs to help maintenance engineers

locate faults based on the log information.

5.4 Remote Maintenance

The HLR9820 provides secure and convenient remote maintenance functions. The

software offers effective protections against viruses, hackers, and malicious attacks.

The remote maintenance functions allow users to:

Query the versions and status of subsystems and modules of the HLR9820.

Monitor and isolate system faults.

Query alarm information of the HLR9820.

Test and debug the functional interfaces of the HLR9820.

Obtain real-time operation information of the HLR9820.

The HLR9820 provides a modular network management interface.


4

Technical Manual - System DescriptionHUAWEI HLR9820 Home Location Register Chapter 8 Reliability

Chapter 6 Reliability

6.1 Overview of HLR9820 Reliability

The HLR9820 is designed on the basis of comprehensive reliability analysis. It uses

advanced protection mechanisms to ensure reliability.

This chapter introduces the reliability measures applied on the HLR9820 during

hardware and software implementation.

6.2 Hardware Reliability

6.2.1 Overview of Hardware Reliability

The hardware reliability of the HLR9820 is ensured by:

Exception Protection

Redundancy and Backup Design

Flow Control

Reliable Power Supply

6.2.2 Exception Protection

The HLR9820 features powerful exception protection functions, including the

protection mechanisms against:

Power failure

Mis-operations on power switches

Lightning strikes on power supply system

High voltage and low voltage

Short circuit

Over current and over voltage on power supply and interfaces

Extreme temperature of power supply units (Internal temperature control

mechanism)

6.2.3 Redundancy and Backup Design

The HLR9820 uses the following redundancy and backup mechanisms:

Multi-processor and multi-step operation design on system level.

Hot backup of the hardware of key boards.

Dual-network dual-plane technique for the HLR database unit (HDU), realizing

real-time data backup and eliminating single-point failures.


1


6.2.4 Flow Control

The HLR9820 provides various flow control mechanisms to handle peak traffic,

including:

Multi-level flow control at C interface, D interface, J interface, Gr interface, and

Gc interface that ensures the smooth adjustment of system traffic.

Real-time monitoring of processor parameters (such as CPU load and resource

utilization), realizing adaptive flow control.

Setting of flow control parameters to implement forced flow control.

When many clients send a mass of MML commands to the server

simultaneously, it may lead to congestion or breakdown of the system if the flow

control function is not adopted.HLR9820 can start the flow control function to

ensure the system running normally at a surge of MML commands.

6.2.5 Reliable Power Supply

To prevent possible system down resulting from power failure, the following measures

are applied on the power supply system:

Voltage detection of input power and warning of high voltage or low voltage.

Protection against sharp voltage fluctuation and lightning strikes.

Protetion of system programs and data in case of power failure.

Protection against over-voltage, over-current, and reverse-polarity connection for

each board.

Power module backup of boards.

6.3 Software Reliability

6.3.1 Overview of Software Reliability

The software reliability of the HLR9820 is ensured by:

Automatic Fault Detection and Self-healing Ability

Data Security

Operation Security.

6.3.2 Automatic Fault Detection and Self-healing Ability

The system software of the HLR9820 features real-time fault detection and self-

healing functions.

The system detects hardware and software faults automatically.

When the hardware or software of a key part fails, the system executes

troubleshooting program to isolate and remove faults.


2


If faults cannot be isolated or removed, the system initiates a switchover so that

the standby system takes over the task to ensure the normal operation.

6.3.3 Data Security

To protect important data, the HLR9820 provides:

Automatic backup of essential data

Multi-level backup: Back up data to other segments of the same disk, to an

external disk, or to a remote data center

6.3.4 Operation Security

To ensure operation security, the HLR9820 offers:

Flow control mechanism for operation tasks to control traffic volume

Customized transfer time of operation tasks to guarantee security and

correctness of the information

Strict management of user authority to prevent illegal operations

Detailed operation logs to enable the traceability of operation information


3

Technical Manual - System DescriptionHUAWEI HLR9820 Home Location Register Chapter 8 Technical Specifications

Chapter 7 Technical Specifications

7.1 Overview of Technical Specifications

Technical specifications of the HLR9820 covers the following aspects:

System Performance

Reliability Specifications

Physical and Electrical Specifications

Clock Specifications

Environment Requirements

Reliability Specifications

7.2 System Performance

Table 1-5 lists the performance specifications of the HLR9820 system.

Table 1-5 System performance specifications of the HLR9820 system

Parameter Index

Maximum subscribers supported 2 million (20million static) subscribers

Bearer networking modes supported

64 kbps

2 Mbps

IP

64 kbit/s signaling links supported 512

2 Mbit/s signaling links supported (TDM) 32

2 Mbit/s signaling links supported (ATM) 32

Average subscription/ deletion duration < 1 sec.

Batch subscription/deletion efficiency > 50 subscribers/sec.

7.3 Reliability Specifications

Table 1-6 lists the reliability specifications of the HLR9820.


1


Table 1-6 Reliability specifications of the HLR9820

Item Specification

System repair rate 0.3

Availability ≥ 99.999%

Mean Time Between Failures (MTBF) 141,117 hours

Mean time to repair (MTTR), excluding the time spent on

journey1 hours

Start time from system power-on to service ready 10 minutes

Interval from application start to service ready after system

power-on4.41 minutes

7.4 Physical and Electrical Specifications

Table 1-7 lists the physical and electrical specifications of the HLR9820.

Table 1-7 Physical and electrical specifications of the HLR9820

Item IBM solution (two cabinets) Sun solution (one cabinet)

Cabinet T00 cabinetN68 service

cabinetN68 service cabinet

Power

consumption

2,000 W,P630

4,000 W,P6502,700 W 2,500 W

Power supply–48 V DC,P630

220 V AC,P650–48 V –48 V

Total weight 420 kg 340 kg 420 kg

Dimensions

H: 1,804 mm

W: 644 mm

D: 1,089 mm

H: 2,200 mm

W: 600 mm

W: 800 mm

H: 2,200 mm

W: 600 mm

W: 800 mm

7.5 Clock Specifications

Table 1-8 lists technical specifications of the HLR9820 clock system.


2


Table 1-8 Technical specifications of HLR9820 clock system

Item Index and function

Clock network

access

parameter

Lowest accuracyStratum-2 clock: 4 x 10-7

Stratum-3 clock: 4.6 x 10-6

Pull-in rangeStratum-2 clock: 4 x 10-7

Stratum-3 clock: 4.6 x 10-6

Maximum

frequency offset

Stratum-2 clock: 5 x 10-10/day

Stratum-3 clock: 2 x 10-8/day

Clock network

access

parameter

Initial maximum

frequency offset

Stratum-2 clock: < 5 x 10-10/day

Stratum-3 clock: < 1 x 10-8/day

Long-term

phase variation

Ideal working

statusMRTIE ≤ 1 ms

Hold working

status

MRTIE (ns) ≤ a x s + (1/2) x b x s2 + c

"s" indicates the time in second. The unit

of MRTIE is nanosecond (ns).

Stratum-2 clock:

a = 0.5 b = 1.16 x 10-5 c = 1000

Stratum-3 clock:

a = 10 b = 2.3 x 10-4 c = 1000

Clock working

modeFast pull-in, locked, holdover, and free-run

Input jitter

toleranceSee Figure 1-5.


3


Note:

Lowest accuracy: In the case of no external reference frequency (free-run), the

maximum value of the offset to the nominal frequency in a long-term (20 years).

Maximum frequency offset: In consecutive clock running, the maximum value of

relative frequency off in a unit period.

Pull-in range: The maximum bandwidth of input signal that can be locked by the

clock.

MRTIE: Within the test time, the variation of maximum peak-to-peak delay of a

tested clock relative to an actual reference clock.

Y(UI)

102

X

斜率为20dB/10倍频程

峰 — 峰抖动和漂动幅度（对数标度）

A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1

Peak-to-Peak Jitter and Wander Amplitude (Log Scale)

Slope: 20dB/10 times of frequency interval

Y(UI)

102

X



A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1

Y(UI)

102

X



A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1

Y(UI)

102

X



A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1


Slope: 20dB/10 octave

Y(UI)

102

X



A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1



Y(UI)

102

X

斜率为

Y(UI)

102

X



A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1



Y(UI)

102

X



A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1

Y(UI)

102

X



A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1

Y(UI)

102

X

20dB/10倍频程


A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1

Y(UI)

102

X



A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1

Y(UI)

102

X



A0=36.9

101

A1=1.5

A2=0.2

1.2́ 10-5

1

10 20 2.4k 18k 100k f(Hz)

10-1


Slope: 20dB/10 octave

Figure 1-5 Maximum allowable input jitter and the lower threshold of wander

Suppose the jitter frequency of an input signal is 1 kHz, the system is still normal

when the amplitude is more than 1.5 UI. Then the input signal satisfies the

requirements shown in the Figure 1-5.

Note:

UI: a unit time interval. The reciprocal of the frequency of digital signal is one UI. For

example, the time interval (UI) of 2.048 Mbit/s signal is 488 ns.

7.6 Environment Requirements

The environment requirements include the requirements for equipment storage,

transportation, and operation.


4


The environment requirements comply to the following two standards:

ETS 300019 "Equipment Engineering (EE); Environmental conditions and

environmental tests for telecom equipment".

IEC 60721 "Classification of environmental conditions".

7.6.1 Storage Environment

The following lists the climate, waterproof, biological, air cleanness, and mechanical

stress requirements of the equipment during storage.

I. Climate Requirements

Table 1-1 lists the climate requirements for equipment storage.

Table 1-1 Climate requirements for equipment storage

Item Range

Altitude 5,000 m

Air pressure 70 kPa to 106 kPa

Temperature –40°C to +70°C

Temperature change rate 1oC/min

Relative humidity 10% to 100%

Solar radiation 1,120 W/s²

Heat radiation 600 W/s²

Wind speed 30 m/s

II. Waterproof Requirements

The equipment is usually stored in a room, where:

There is no water on the ground.

No water (such as water from auto fire-fighting devices and air-conditioner) may

endanger the package.

If the equipment has to be placed outdoor, make sure that:

The package is intact.

Waterproof measures are applied to prevent rain from entering the package.

There is no water on the ground and no water may enter the package.

The package is not exposed to direct sunshine.


5


III. Biological Requirements

No fungus or mildew may grow.

There are no rodent animals such as rats.

IV. Air Cleanness

The air is free from explosive, conductive, magnetic conductive or corrosive dust.

The density of physically active materials must comply with the requirements listed in

Table 1-2.

Table 1-2 Storage requirements for physically active materials

Physically active

materialUnit Density

Suspending dust mg/m³ 5.00

Falling dust mg/m²·h 20.0

Sand mg/m³ 300

Note:

Suspending dust: Diameter 75 m

Falling dust: 75 m Diameter 150 m

Sand: 150 m Diameter 1,000 m

The density of chemically active materials must comply with the requirements listed in

Table 1-3.

Table 1-3 Storage requirements for chemically active materials

Chemically active


SO2 mg/m³ 0.30

H2S mg/m³ 0.10

NO2 mg/m³ 0.50

NH3 mg/m³ 1.00

Cl2 mg/m³ 0.10

HCl mg/m³ 0.10


6


Chemically active


HF mg/m³ 0.01

O3 mg/m³ 0.05

V. Mechanical Stress

Table 1-4 lists the mechanical stress that the equipment can endure during storage.

Table 1-4 Mechanical stress requirements for storage environment

Item Sub-item Range

Sinusoidal vibration

Offset 7.0 mm None

Accelerated speed None 20.0 m/s²

Frequency range 2 Hz to 9 Hz 9 Hz to 200 Hz

Unsteady impact

Impact response

spectrum II 250 m/s²

Static payload 5 kPa

Note:

Impact response spectrum: The maximum acceleration response curve generated

by the equipment under specified impact excitation. Impact response spectrum II

means that the duration of semi-sine impact response spectrum is 6 ms.

Static payload: The capability of the equipment in package to bear the pressure

from the top in normal pile-up method.

7.6.2 Transportation Environment


stress requirements of the equipment during transportation.


Table 1-5 lists the climate requirements for equipment transportation.


7


Table 1-5 Climate requirements for equipment transportation

Item Range

Altitude 5,000 m


Temperature –40 °C to +70 °C

Temperature change rate 3 °C/min

Humidity 50% to 100%

Solar radiation 1,120 W/s²

Heat radiation 600 W/s²

Wind speed 30 m/s

II. Waterproof Requirements

Before transporting the equipment, make sure that:

The package is intact.

Waterproof measures are applied to prevent rain from entering the package.

There is no water on the transportation vehicle.

III. Biological Requirements



IV. Air Cleanness



Table 1-6.

Table 1-6 Transportation requirements for physically active materials

Physically active material Unit Density

Suspending dust mg/m³ No requirement

Falling dust mg/m²·h 3.0

Sand mg/m³ 100


8


Note:

Suspending dust: Diameter 75 m

Falling dust: 75 m Diameter 150 m

Sand: 150 m Diameter 1,000 m


Table 1-7.

Table 1-7 Transportation requirements for chemically active materials

Chemically active material Unit Density

SO2 mg/m³ 0.30

H2S mg/m³ 0.10

NO2 mg/m³ 0.50

NH3 mg/m³ 1.00

Cl2 mg/m³ 0.10

HCl mg/m³ 0.10

HF mg/m³ 0.01

O3 mg/m³ 0.05

V. Mechanical Stress

Table 1-8 lists the mechanical stress that the equipment can endure during

transportation.

Table 1-8 Mechanical stress requirements for transportation

Item Sub-item Range

Sinusoidal

vibration

Offset 7.5 mm -- --

Accelerated

speed-- 20.0 m/s² 40.0 m/s²

Frequency

range

2 Hz to

9Hz

9 Hz to

200 Hz

200 Hz to

500 Hz


9


Item Sub-item Range

Random

vibration

Spectrum

density of

accelerated

speed

10 m²/s³ 3 m²/s³ 1 m²/s³

Frequency

range

2 Hz to

9Hz

9 Hz to

200 Hz

200 Hz to

500 Hz

Unsteady

impact

Impact

response

spectrum II

300 m/s²

Static payload 10 kPa

Note:






7.6.3 Operation Environment


stress requirements of the equipment during operation.


Table 1-9 and Table 1-10 list the equipment operation requirements for temperature,

humidity, and so on.

Table 1-9 Operation requirements for temperature and humidity

Temperature Relative humidity

Normal Safe Normal Safe

15°C to 30°C 0°C to 45°C 40% to 75% 20% to 90%


10


Temperature Relative humidity

Note:

The values are measured 1.5 m above the floor and 0.4 m in front of the

equipment, without protective panels in front of or behind the cabinet.

Safe operation refers to continuous operation for no more than 48 hours or

accumulated operation of no more than 15 days in a year.

Table 1-10 Operation requirements for other climax factors

Item Range

Altitude 4,000 m


Temperature change rate 3 °C/min

Solar radiation 700 W/m²

Heat radiation 600 W/m²

Wind speed 1 m/s

II. Biological Requirements



III. Air Cleanness



Table 1-11.

Table 1-11 Operation requirements for physically active materials

Physically active


Dust particles Particles/m³

3 x 104

(No visible dust accumulated on desk top

within three days)


11


Note:

Dust particles: Diameter 5 m


Table 1-12.

Table 1-12 Operation requirements for chemically active materials

Chemically active material Unit Density

SO2 mg/m³ 0.20

H2S mg/m³ 0.006

NH3 mg/m³ 0.05

Cl2 mg/m³ 0.01

IV. Mechanical Stress

Table 1-13 lists the mechanical stress that the equipment can endure during

operation.

Table 1-13 Mechanical stress requirements during equipment operation

Item Sub-item Range

Sinusoidal vibration

Offset 3.5 mm --

Accelerated speed -- 10.0 m/s²

Frequency range2 Hz to 9

Hz9 Hz to 200 Hz

Unsteady impact

Impact response spectrum

II 100 m/s²

Static payload 0

Note:







12


7.7 Compliant Safety Standards

Table 1-14 lists the safety standards that the whole HLR system complies with.

Table 1-14 Safety standards complied by the HLR

Item Standards

Safety IEC60950 standard

Earthquake-proof performance EN 300 019-2-3 standard, IEC Class 4M3

EMC ETSI EN 300-386 standard, Class B

Dustproof performance IP50

The cabinets and modules of the HLR9820 comply with the following safety

standards:

IEC60297-1 Dimensions of mechanical structures of the 482.6 mm (19 in.) series

Part 1: Panels and racks.


Part 2: Cabinets and pitches of rack structures.


Part 3: Subracks and associated plug-in units.

The boards and subracks of the HLR9820 comply with the following safety standards:

IEEE1101.1-1991 IEEE stand for Mechanical Core Specification for

Microcomputers Using IEC 60603-2 connectors.

IEEE1101.10-1996 IEEE stand for Additional Mechanical Core Specification for

Microcomputers Using IEEE Std 1101.1-1991 Equipment Practice.

IEEE1101.11-1998 IEEE stand for Mechanical Rear Plug-in Units Specification

for Microcomputers Using IEEE 1101.10 Equipment Practice.


13

Technical Manual - System DescriptionHUAWEI HLR9820 Home Location Register Chapter 8 Installation and Expansion

Chapter 8 Installation and Expansion

8.1 System Installation

The HLR9820 system is assembled in the factory. Before product delivery, all internal

cables of cabinets are connected and the system is pre-commissioned based on site

conditions.

On the site, engineers only need to install cabinets, insert boards, connect

minicomputers and external cables to cabinets following the instructions in the

hardware installation manual.

All internal cables of the HLR9820 are at the back of the cabinet. Boards can be

inserted and removed easily from the front.

Interfaces for external cables, such as power cables, transmission cables, and signal

cables, are on top of the cabinet with remarkable silk-screen marks.

Before product delivery, the software of the HLR9820 is installed and parameters are

set based on site configuration. After the hardware is installed, the system is ready to

operate upon power-on.

All these efforts save installation time on site, enabling operators to build networks

and to deliver services in a shorter time.

8.2 System Expansion and Upgrade

As the service traffic grows, the system may need expansion. HLR9820 allows

operators to expand system capacity without adding additional cabinets by:

Inserting new trunk interface boards or/and service boards in the existing

cabinet.

Increasing the memory capacity of minicomputers and the number of CPUs.

The HLR9820 offers a powerful software upgrade tool. This tool collects upgrade

information and gives related upgrade messages automatically.

The tool also supports online software upgrade. This allows operators to upgrade the

software without interrupting ongoing services.


1

hlr9820 system description

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