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Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
GU HLR9820 System
Overview
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Foreword
� This course describes the system structure of the
HLR9820. It helps you to understand the HLR9820
generally.
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Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
References
� SingleSDB Product Manual-Product Description
� SingleSDB HLR9820V900R006 Product Manual-Feature
Description
Page2
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Objectives
� Upon completion of this course, you will be able to:
� Learn the logical structure of the HLR9820, functions of
each subsystem, and the relationship between the
subsystems
� Learn the networking modes and typical configurations of
the HLR9820
� Learn the basic performance specifications of the HLR9820
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Contents
1. Overview of the HLR9820
2. System Structure of HLR9820
3. Networking and Configuration of HLR9820
4. Service Processing Procedures of HLR
5. Features and Performance Specifications
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Position of the HLR9820 in the Network
J
LcLg
BS
BS
BS
BS
BS
BS
BSC
RN C
SG SN G GSN
M SC
SCP
IP Netw ork
G SM /PSTN
Iu
Iu
Gn G i
C /D
CAP
ISUP
G cGr
G M LC
Lh
LgHLR9820
SM C
E C
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Networking of the SingleSDB
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Interfaces Supported by the HLR9820
Interface From the HLR
to
Function Bearer Type
C MSC/GMSC/S
MC
The HLR provides the routing information to the
MSC/GMSC/SMC through the C interface.
TDM/IP
D VLR The HLR interacts with the VLR through the D
interface to implement mobility management
and authentication in the circuit switched (CS)
domain.
TDM/IP
Gr SGSN The HLR interacts with the SGSN through the Gr
interface to implement mobility management in
the packet switched (PS) domain.
TDM/IP
Gc GGSN The HLR interacts with the GGSN through the
Gc interface to implement call management in
the PS domain.
TDM/IP
J SCP The HLR interacts with the SCP through the J
interface to implement CAMEL message
processing.
TDM/IP
Lh MLC The HLR interacts with the MLC through the Lh
interface to implement MAP message
processing.
TDM/IP
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MAP Interface Protocol Stack
TCAP
SCCP
SCTP
IP
MAC
HLR
M3UA
MAP
TCAP
SCCP
SCTP
IP
MAC
M3UA
MAP
C/D/JGs/Gr
(b) IP-based
HLR
C/D/JGs/Gr
(a) TDM-based
TCAP
SCCP
MTP-1
MAP
TCAP
SCCP
MTP-1
MAP
MTP-2 MTP-2
MTP-3 MTP-3
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Questions
� What are the interfaces between the HLR and the MSC,
VLR, SCP, SGSN, or GGSN?
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Contents
1. Overview of the HLR9820
2. System Structure of HLR9820
3. Networking and Configuration of HLR9820
4. Service Processing Procedures of HLR
5. Features and Performance Specifications
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Functional Structure
Logically, the HLR9820 consists of two NEs, namely, the FE (service
node) and the BE (data node).
� The FE receives signaling messages and implements service processing. It
consists of the signaling processing subsystem and O&M subsystem.
� The BE implements subscriber data storage, access, and management
functions. It consists of the subscriber data management subsystem, data
service subsystem, data storage subsystem, and O&M subsystem.
� Physically, the FE and the BE can be deployed in integrated mode or
separated mode.
� In the networking of the SingleSDB, the BE is shared by HLR
and other NEs, this course mainly introduce the HLR FE part.
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Hardware Structure -Product Appearance
� The SingleSDB adopts Huawei N68E-22 cabinet.
� The SingleSDB adopts the OSTA 2.0 subrack
that is compatible with the ATCA.
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Hardware Structure-Internal Components
The cabinets can be
classified into integrated
configuration cabinets and
expansion cabinets based
on the components installed
in the cabinets.
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Hardware Structure
OSTA 2.0 subrack provides 3 buses: IPMB, BASE Bus, FABRIC Bus
� The intelligent platform management bus (IPMB) is the
monitoring and device management bus of the OSTA 2.0
subrack. It connects all the devices in the OSTA 2.0 subrack.
� The Base bus is the management and control bus of the OSTA
2.0 subrack. It provides a channel for software loading, alarm
reporting, and maintenance message delivery.
� The Fabric bus provides a data channel for the system service
plane. It transmits the service information of the system.
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Hardware Structure-Boards
The boards can be classified into the following types
based on their position:
� Front board
� Back board
� Backplane
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HLR9820 System Structure
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Functions of the GU HLR FE
When the FEU serves as the HLR, it provides the following
functions:
� Processes and forwards signaling messages.
� Processes and forwards MTP2 and MTP3 messages of the SS7
signaling if TDM networking is adopted.
� Processes and forwards SCTP and M3UA messages if IP
networking is adopted.
� Processes SCCP, TCAP, and MAP messages, and interacts with
the data service subsystem to query or update subscriber data.
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Functional Structure of the FE
The FE consists of the following functional modules:
� BSG: Broadband Signal Gateway
� CCU: Call Control Unit
� DSG: Data Service Gateway
� DPU: Dispatch Unit
� OMU: Operation & Maintenance Unit
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Functional Structure of the Signaling Processing Subsystem
Signaling processing path
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DPU Module
The DPU provides the following functions:
� Provides service ports for other NEs and implements port aggregation.
� Forwards the received IP packets to a proper BSG or DSG for
processing based on the quintuplet (source IP address, source port
number, destination IP address, destination port number, and protocol
number) contained in the received packets.
� Receives IP data packets from the BSG or DSG and sends them to the
peer NEs.
There are signaling plane DPUs and data plane DPUs. The signaling
plane DPUs are responsible for signaling access, and the data plane
DPUs are responsible for communication with the data service
subsystem.
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DSG
The DSG provides the following functions:
� Receives the data access requests from the CCU and
forwards the requests to the data service subsystem
for processing.
� Receives the data access responses from the data
service subsystem and forwards the responses to the
CCU.
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BSG
The BSG provides the following functions:
� On receiving TDM signaling, the BSG processes SS7 messages
to the MTP2 layer and MTP3 layer and forwards the processed
messages to the CCU.
� On receiving IP signaling, the BSG processes IP messages to the
SCTP layer and M3UA layer and forwards the processed
messages to the CCU.
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CCU
The CCU receives the signaling messages sent from the BSG and implements
the protocol processing at the MAP layer.
The CCU provides the following functions:
� Processes the MAP messages, such as the location update request and Send
Routing Info (SRI) request, sent from the BSG.
� Processes the MAP message for inserting the subscriber data initiated by the
PGW during the operations such as subscriber data update and simulated
sending of the Cancel Location message.
� Interacts with the DRU to obtain the required subscriber data from the DSU or
to update the subscriber data stored in the DSU.
� Integrated with the functions of the AuC, the CCU implements the
authentication-related operations.
The functions of the CCU module are implemented by the GUFEU board. The
GUFEU boards work in load-sharing mode.
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Interfaces Provided by the Signaling Processing Subsystem
Interface Function
Signaling interface
Through the interface, the signaling processing subsystem communicates with external NEs, such as the MSC and the STP.
• The DPU is used for receiving broadband signaling.
• The BSG is used for receiving narrowband signaling.
Data access interface
Through the interface, the FE communicates with the DRU to query or modify the data in the data service subsystem.
Subscription notification interface
Through the interface, the FE communicates with the PGW.• The FE subscribes to notification messages from the PGW.• After modifying the subscriber data, the PGW sends a notification message to the FEs.
O&M interface Each module communicates with the OMU through the NMS agent. The O&M interface is used for maintaining modules and reporting the module status and alarms.
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Questions
1. Which module processes the SCCP signaling?
2. Which module processes the MAP signaling and MAP
services?
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Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Answers
� 1.CCU
� 2.CCU
Page26
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Contents
1. Overview of the HLR9820
2. System Structure of HLR9820
3. Networking and Configuration of HLR9820
4. Service Processing Procedures of HLR
5. Features and Performance Specifications
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Networking solutions for different product applications
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Stand-alone HLR solution
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N+1 mated redundancy solution
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2x(FE+BE) Seamless Geographic Redundancy Solution
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Multi-FE+2BE Seamless Geographic Load-Sharing Redundancy Solution
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HLR9820 Configuration Solutions
Type Number of Operations (All-IN)
SendAuthenticationInfo 10
UpdateLocation 10
SendRoutingInfo 20
SendRoutingInfo (for IN) 20
SendRoutingInfoForSM 25
GprsUpdateLocation 1
All-IN GSM traffic model
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Small Capacity: 5 Million Subscribers
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Medium Capacity: 10
Million Subscribers
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Contents
1. Overview of the HLR9820
2. System Structure of HLR9820
3. Networking and Configuration of HLR9820
4. Service Processing Procedures of HLR
5. Features and Performance Specifications
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Authentication Procedure
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Location Update
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Signaling flow for CAMEL SRI
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Insert Subscribe Data
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Contents
1. Overview of the HLR9820
2. System Structure of HLR9820
3. Networking and Configuration of HLR9820
4. Service Processing Procedures of HLR
5. Features and Performance Specifications
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System Features
� Distributed structure
� Compatible with standard OSTA 2.0 hardware platform
� In-memory data management
� Multi-level data backup mechanism
� Smooth data convergence capability
� Standard and open data access interfaces
� Comprehensive data statistics and analysis
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Services Provided by the HLR9820
� Basic services
� Supplementary services
� GPRS service
� IN service
� Location service
� Operator-Determined Barring Services
� Special services
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Performance Specifications of the HLR9820Board Name
Back Borad Performance Description
GUFEUIP:USIA1;TDM&IP:ETIA2
If less than four GUFEU boards are configured, the N+1 backup mode is adopted; if more than four GUFEU boards are configured, the N+2 backup mode is adopted.
USRSU USIA1The USRSU boards are configured to work in 1+1 active/standby mode and function as the combined boards of the USDRU and USDSU.
USPMU USI2Two USPMU boards are configured to function as the combined boards of the USDMU and USPGW.
USPGW NoneEach USPGW board can process 2000 MML commands per second. Configuration Rules: N+1(1<=N<=5)。
OMUUSIA7 Each site is configured with two OMU boards working
in 1+1 active/standby mode.
S2600 Disk Array
NoneConfigure only one for every office.
LanSwitch
None The LAN switches allow the signaling plane and data plane to access the bearer network through different VLANs.
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Reliability specifications of the SingleSDB