2.HLR System Structure

HLR-A-T02-E1

HLR

System Structure ZTE University

FCN Training TEAM

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Content： Part1、HLR system structure Part2、Signaling FEP Hardware Part3、Subscriber Database System Part4、Operation Maintenance Center system

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Part1

HLR System Structrue

Operation and maintenance background

Subscriber data management background

NMS

DDN/X.25/FR/ PSTN

Q3 or COBRA OMC Client

Database Server

OMM Client

FE

FE

DBIO Server

FE

HLR Agent

FE

FE

OMC & OMM Server ZXWN HLR

BOSS

Interface Processor FE

Switch FE

FE OMP FE

RPU

SMP

F E

FE

USI FE

Switch(UIM) FE

FE

Signaling FEP

SIG IPI

SPB

FE

E1

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NO.7 Signalling

SigTran Network

SYN Signal Output

FE

CLKG

SYN Signal Input BITS SYN Signal Input

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Part2 Signaling FEP Hardware

Signaling FEP consists of ： 1、Rack 2、Shelf 3、Board

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1、Cabinet（or Rack ）

measurement 2000mm×600mm×800mm

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Part2 Signaling FEP Hardware Blank panel (1U) POWER DISTRIBUTE UNIT ALM

Power subrack (2U)

Fan subrack (1U)

Service subrack (8U)

Cable s ubrack (1U)

Service subrack (8U) 0 0 0 2

Cable subrack (1U) Fan subrack (1U)


Cable s ubrack (1U)


Cable s ubrack (1U) Fan subrack (1U)

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Air filter

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2、Rack 

Control Sub-Rack of ZXWN iHLR adopts the shieldingclass structure where front boards and back boards are inserted in the opposite direction.



The control Sub-Rack is the control center of the iHLR. It manages and controls the whole system.

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Part2 Signaling FEP Hardware 

There are special Boards can be inserted in a control sub-rack ：

1．

CLKG

2．

UIM（UIMC）

3．

MPx86（SMP、OMP、RPU）

4．

MNIC（USI、SIG-IPI）

5．

SPB

6．

CHUB

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Part2 Signaling FEP Hardware Example

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The example shown in the foreside pictrue are twolayer Sub-Racks. The board names beginning with the letter R are the corresponding back boards.

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3、Board Board Name CLOCK Generation Board (CLKG) Main Processing Board (MPx86) Multi-Function Network Interface Card (MNIC) Universal Interface Board (UMIC) Signaling Process Board (SPB) Power Distribution Board (PWRD) Control HUB(CHUB)

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（1）CLKG 



The CLKG is the clock generation board in the iHLR system. CLKG is in the hot active/standby mode. The active and standby CLKGs are locked to the same reference to implement smooth change over. CLKG adopts a measure to filter out phase jitters or burrs of the clock during the change over. The CLKG communicates with the main processing unit through RS485. At the same time, it uses the clock reference 8 KHz frame synchronization signal from the trunk SPB, or 2 MHz/2 Mbits signal from the BITS system.

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

ZXWN iHLR requires only one pair of clock generation boards (CLKG). The CLKG boards are in the active and standby mode and are inserted in slots 13 and 14 of the control Sub-Rack. The corresponding back boards are called RCKG.

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（2）MPx86  MPx86

can be used as an OMP, RPU, signaling MP or service MP. The OMP and RPU are on the same MP board. OMP uses the first CPU on MPx86 and RPU the second. The signaling MP and service MP are called SMPs. 。  On MPx86 board, there are two sets of CPU systems. They are respectively called CPU_A and CPU_B. The two CPU systems are independent of each other. CPU_A is the main control, managing circuit boards. ZTE University

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OMP MPx86

RPU

SMP

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• The OMP controls the operation and maintenance (including the operation and maintenance agent) of the whole system and is connected with the OMC through a 100M Ethernet interface for isolation of internal and external network segments. • The RPU is responsible for maintaining routing tables for all the NEs. •

The SMP processes signaling from various interfaces, including narrow band No.7 signaling (MTP3, SCCP, TCAP and MAP) and SIGTRAN signaling (SCTP, M3UA).

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（3）MNIC 

The MNIC can be used as a USI or IPI interface unit. For this at least two MNIC cards have to be configured. They work in the 1+1 backup or load sharing mode.

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

When the MNIC is used as an IPI board, it provides an FE interface and processes SIGTRAN bottom-layer signaling. It forwards IP packets. It forwards the SCTP packets received from the IP network to the signaling MP for processing. After receiving routing packets, the IPI board forwards them to the RPU. The routing table is maintained by the RPU.  The USI board is a universal server interface board. The service processing MP communicates with the database server through the USI board for storing user data.

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（4）UIMC UIMC： The

UIMC manages the control Sub-Rack and implements Ethernet level-2 switching inside the control Sub-Rack. It provides two 24+2 switched Hubs.

 It

provides the clock-driven function inside resource SubRacks. After the phase lock and drive, the input clock signals will be distributed to various slots in resource SubRacks. 。  It provides the function of reading cabinet numbers, SubRack numbers, slot numbers, equipment numbers, backplane version numbers and backplane type numbers. ZTE University

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（5）SPB   

If HLR need to be connected with PSTN ,SPB can be used to provide E1 interface The SPB circuit board provides 16 E1 interfaces, four CPU-based communication processing units The SPB board supports 64K and 2M signaling links. It supports a maximum of four 2M signaling links or one hundred and twenty eight 64K signaling links.

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（6）CHUB



The CHUB unit (a control hub) implements tandem connections for the control planes of multiple Sub-Racks.

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（7）PWRD PWRD distributes isolates and backs up two channels of –48 V power supply in the iHLR system, and monitors the power supply, cabinets and environment. The power supply part includes the EMC filtering design, lightning protection design and isolation design of the power input/output end.

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The monitoring part includes over-voltage and undervoltage detection of two channels of –48 V power supply, speed detection of 18 fans, and detection of environment temperature, environment humidity, smoke sense alarms, infrared alarms, cabinet entrance control and equipment room entrance control.

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Part3 Subscriber Database System

Software Name Database Server DB Engine DBIO Server

Storing subscriber data， provide interface for modifing database.

HLR Agent

A tool for operator， for maintenancing subscriber data

Interface processor

An interface to Boss system,for maintanencing subscriber data automatically

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Part3 Subscriber Database System MiniComputor Server

PC

Hlr Agent

SWITCH

PC Server Subscriber Database+DBE HLR Interface processor+DBIO ZTE University

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Normally,there is one Database Node to be adopted.And one node include two servers plused one disk array.

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Part3 Subscriber Database System Database principle：  



The database is divided two parts,one is application database and the othe is memory database . Both application database and memory database are used. Thus, the application database serves as the reliable backup of subscriber data while the memory database ensures the data access performance of large-capacity system. Minicomputer servser is often adopted,such as IBM minicomputer,HP minicomputer.

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DDN/X.25/FR

DBIO Server

PSTN

BOSS

Local HLR Agent BOSS

Internet

BOSS

HLR Interface processor

Remoter HLR Agent

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HLR Agent BOSS

DBIO Server

System COMMAND

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Interface processor

database server

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Part3 Subscriber Database System The

local service handling console (iHLR Agent) provides the man-machine operation platform for subscriber management. The

service handling server (DBIO Server) receives the request from iHLR Agent and the remote service handling request from the iHLR interface machine. It send the message s of queries, adds, deletes and modifies to . Database. iHLR

interface machine (Interface Processor) provides the open interface for upper NMC and enables the BOSS system to access the ZXWN iHLR system. After receiving the service handling request, the Interface Processor makes service operations through the DBIO Server. ZTE University

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Notice: 1.

DBIO is often installed on PC server ;

2.

Database and DBE is often installed on minicomputer(Unix System);

3.

Some time , DBIO and Database and DBE can be installed on one PC server;

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Part4 Operation Maintenance Center system OMC Server Oracle

One pc server OMC Client

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Part4 Operation Maintenance Center system OMC

Server is the maintenance center of the entire system. OMC Client is the client of maintenance system. The Client/Server structure is adopted. OMC

Server stores the configuration data of the entire device and has such maintenance functions as network configuration, alarm management, performance statistics, signaling trace and service observation. The

NM client of operation & maintenance background adopts ordinary PC machine and the server adopts middleend or lower-end server.

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2.HLR System Structure

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