MSCG9 overview
ISSUE 1.0
Wireless Curriculum development section
Objectives
Upon completion of this course,you will be able to:
• Know 3Gpp evolution path, and know
each step’s characteristic
• Master MSOFTX3000 and UMG8900’s
function
• Master the Numbering plans in GSM
.
.
GSM Interfaces
D
HLR
G H
VLR VLR C AUC
EIR
B F
MSC MSC
E
IWF EC EC IWF
A
TC
Um Abis
MS BTS BSC
.
.
The Network Switching system
NSS AUC
HLR
OMC EIR
EC PSTN
MSC/VLR
IWF
Mobile Switching Center – MSC
Home Location Register – HLR
Visitor Location Register – VLR
Equipment Identity Register – EIR
Authentication Center – AUC
BSS
Inter-Working Function – IWF
Echo Cancellor – EC
..
.
Mobile Service Switching Center – MSC
Call Processing
Operations and Maintenance Support
Inter-network & Inter-working
Billing
Home Location Register – HLR
Subscriber ID (IMSI and MSISDN)
Current subscriber VLR (current location)
Supplementary service information
Subscriber status (registered/deregistered)
Authentication key and AuC functionality
Visitor Location Register – VLR
Mobile Status(IMSI detached/ attached)
Location Area Identity(LAI)
Temporary Mobile Subscriber Identity(TMSI)
Mobile Station Roaming Number(MSRN)
Core Network Evolution (III)
Terminal Radio 3G R4 Core Network External
Network Network
UMTS CS Control Plane
MSC Server/VLR/SSP
PSTN
BSS H.248
Bear Plane Service
Domain
MGW
HLR/AUC
/LCS
SMS/SCP
UMTS PS
UTRAN SGSN/GGSN/CG/BG
R4:
3GPP R6
3GPP R5
3GPP R4
MSC of CN (core network) is divided into 3GPP R99
GSM
..
two physical parts: MSC Server and MGW . 1999/03 2000/03 2001/03 2002/03 layout
Core Network Evolution (IV)
Terminal Radio 3G R5 Core Network External
Network Network
UMTS CS Control Plane
MSC Server/VLR/SSP
PSTN
BSS H.248
Bear Plane Service
Domain
MGW
HSS/LCS
MMS/SCP
UMTS PS UMTS IMS
UTRAN
SGSN/GGSN MGCF/CSCF/MRF
R5:
3GPP R6
Support End to End VOIP 3GPP R4
3GPP R5
3GPP R99
New IMS (IP multimedia Subsystem) Domain GSM
is introduced to CN 1999/03 2000/03 2001/03 2002/03 layout
Function of MSC Server and MGW
MGW is responsible for media resource processing , codec conversion of
speech ,and switching between bearer channel of different type (IP/ATM/TDM)
MSC Server is charge of signaling control, call and service processing, and
resource management etc.
MSC Server and one or more MGW are connected through standard H.248 protocol.
MSC Server and MGW can be geographically distributed as operator’s requirement
MSC Server
H.248
MGW
.
Support UMTS R99/GSM Networking
Huawei 3G MSC
Support UMTS R4 Networking
Based on IP transmission, the long distance
trunk resource can be reduced 300% !
Huawei MSoftX3000
Huawei UMG8900
Multiple Protocol and Interface
SCP
IN HLR
CAP MAP
3G RAN RANAP SMS
MAP GMSC
MSC
BSSAP server ISUP/TUP
GSM BSS H.248 GMSC
MGW
BICC
Abundant service Interface:
Packet ：FE、GE、155M ATM/POS PSTN
GMSC
TDM：E1、SDH155M
Voice and Video Codecs
Voice：G.711、G.723、G.729、AMR 、Conference
Video：MPEG4、H.261、H.263
Facsimile：T.38、T.30
.
Service Area
System area
PLMN
PLMN service
service area
area PLMN service area
MSC service area... MSC service area...
Location area...
Base station area...
Location area...
......
Base station area...
Radio cell
Radio cell
...... ......
Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
MSC/VLR Number
CC NDC LSP
MSC/VLR number
The format is CC+NDC+LSP
CC：Country Code.
For example: The CC of China is "86".
NDC：National Destination Code.
For example: The NDC of China Mobile is 139、138、137、
136、135.
LSP(locally significant part): is defined by Telecom operator.
For example: 86-139-00311
LAI
MCC MNC LAC
Location Area Identification
The LAI is the international code for a location area.
MCC：Mobile Country Code，It consists of 3 digits .
For example: The MCC of China is "460"
MNC：Mobile Network Code，It consists of 2 digits .
For example: The MNC of China Mobile is "00"
LAC： Location Area Code，It is a two bytes BCD code(hex).
The value 0000 and FFFF is invalid.
For example: 460-00-0011
CGI
CGI: Cell Global Identification
The CGI is a unique international identification for a
cell
The format is LAI+CI
LAI: Location Area Identification
CI ： Cell Identity. This code uses two bytes BCD
code(hex) to identify the radio cells within an LAI.
For example : 460-00-0011-0001
MSISDN
CC NDC SN
National (significant)
Mobile number
Mobile station international
ISDN number
CC： Country Code. For example: The CC of China is "86".
NDC：National Destination Code. For example: The NDC of
China Telecom is 139, 138, 137, 136, 135.
SN： Subscriber Number. Format:H0 H1 H2 H3 ABCD
Example: 86-139-0666-1234
IMSI
Not more than 15 digits
3 digits 2 digits
MCC MNC MSIN
NMSI
IMSI
MCC：Mobile Country Code，It consists of 3 digits .
For example: The MCC of China is "460"。
MNC：Mobile Network Code，It consists of 2 digits .
For example: The MNC of China Telecom is "00"。
MSIN：Mobile Subscriber Identification Number. H1H2H3 S ABCDEF
For example: 666-9777001
NMSI：National Mobile Subscriber Identification，MNC and MSIN
form it together.
For Example of IMSI : 460-00-666-9777001
TMSI
TMSI: Temporary Mobile Subscriber Identification)
The TMSI is assigned only after successful
subscriber authentication.
The VLR controls the allocation of new TMSI
numbers and notifies them to the HLR.
TMSI is used to ensure that the identity of the
mobile subscriber on the air interface is kept
secret.
The TMSI consists of 4 bytes( 8 HEX numbers)
and determined by the telecom operator.
.
IMEI
IMEI: International Mobile Station Equipment Identification
TAC FAC SNR SP
IMEI
TAC ： Type approval code. It is administered by the type
approval center.
FAC ： Final assembly code.It is administered by the
manufacturer.
SNR：Serial number.It is issued by the manufacturer of the MS.
SP：Not used.
LOCATION UPDATE
Common Location Update
When an MS is powered on or is on the move, if the
location area identifier that the MS receives from the BTS
is not the same as that stored in the MS, the MS originates
a location update request to the network to update the
location area identifier.
TYPES OF LOCATION UPDATE
The following are the different types of location update
flow
1. Common Location Update
2. Periodic Location Update
3. Independent Location Update
4. Combined Location Update
5. Location Cancellation
.
Location Update Flow
. .
Analysis
The signaling flow of a successful intra-VLR common location update (only VLR
is involved) is as follows:
1.The MS sends a Location updating request message to the MSC. The
message carries the TMSI/IMSI of the MS, the LAI, and the location update type.
2.The MSC sends a MAP_UPDATE_LOCATION_AREA_REQ message,
requesting the VLR to perform a location update.
3.The MSC/VLR initiates the authentication and encryption flow. This flow is
optional.
4.The VLR updates the location of the MS, stores the new LAI, and assigns a
new TMSI (assigned in the TMSI re-assignment flow, which is optional) for the
MS. Then, the VLR sends a MAP_UPDATE_LOCATION_AREA_ACK message,
notifying the MSC that the location update is successful.
5.The MSC sends a Location updating accept message carrying the new TMSI,
notifying the MS that the location update is successful.
6.The MSC releases the channel. The location update is complete
. .
Hardware Components of MSOFTX3000 Cabinet
1. Cabinet
2. Power distribution box (PDB)
3. Subrack 1
4. Fan box
5. Master Rack Monitoring Unit
(MRMU)
6. LAN Switch
7. Cabling trough
8. KVMS
9. Subrack 0
10. Filler panel
11. Subrack 2
12. Subrack 3
Page26
General Hardware Logical Structure
Switch subsystem Equipment management
subsystem Electromechanical subsystem
SWU/SWI SMM/SDM FAN PEM
SWU/SWI SMM/SDM FAN PEM
Back Plane
IPMB
Base
UPB/USI/ETI
UPB/USI/ETI
UPB/USI/ETI
UPB/USI/ETI
UPB/USI/ETI
UPB/USI/ETI
Fabric
TDM
Processor subsystem
Page27
Board Classification Based on Installation
Positions
1 USI: Universal Service Interface 2 SWI: Switch Interface Unit
3 UPB: Universal Process Blade 4 SWU: Switch Unit
5 Front boards, 6 Backplane, 7 Back boards
SMM: Shelf Management Module SDM: Subrack Data Module
Page28
Classification of Boards
• Based on their functions, the boards can be classified
into the UPB, USI, ETI, SWU, SWI, SMM, and SDM.
Board Type Function
UPBA0,UPBA1, It can process data services through the service
UPB UPBA5 application software installed.
It provides interfaces for communication between
USI USIA1,USIA7 the UPB and the external devices
The SWU provides internal and external
SWUA0, information exchange functions through the Base
SWU SWUA1 and Fabric planes
SWI SWUA0,SWIA1 the interface board of the SWU
SMM SMM management module of a subrack
It records the subrack information and system
SDM SDM performance parameters
Page29
UPBA
The universal process blade (UPBA) is the
service processing unit of the subrack. It
processes data services through the
service application software installed on it.
1. Captive screw 2. Hard disk 1
3. Hard disk 0 4. USB port
5. COM serial port 6.HOTSWAP indicator
7. HD0_RAID/ALM indicator 8. HD0_ACT indicator
9. HD1_RAID/ALM indicator 10.HD1_ACT indicator
11.SYSTEM indicator 12.HEALTHY indicator
13. OOS indicator 14.Ejector lever
Page30
USIA
The USIA (universal service interface unit ) must be used with
the UPBA, and can be installed with different subboards to
provide different interfaces (FC interfaces, Gigabit Ethernet
interfaces, Ultra 320/160 SCSI interfaces, Standard VGA port，
USB port) for the UPBA to communicate with external devices.
The USI is classified into USIA1 and USIA7.
The USIA1 provides four GE interfaces and can serve as an IP interface board or an
interface board for the iGWB/XPTU.
The USIA7 provides six GE interfaces and one RTC clock module. It can serve as an
interface board for the OMU.
1.Captive screw 2. Shielding finger
3. Ejector lever 4. OOS indicator
5. HEALTHY indicator 6. Cover
7. HOTSWAP indicator 8. Monitor port
9. USB port
Page31
ETIA
The ETIA (E1/T1 interface unit) provides various
interfaces for the UPBA to communicate with
external devices. It must be used with the UPBA.
The ETIA provides TDM and GE interfaces to
implement the TDM service and signaling
processing function.
The ETIA0 provides 32 E1/T1 interfaces.
The ETIA2 provides 16 E1/T1 interfaces
and 2 GE interfaces.
ETIA0 ETIA2
Page32
SWU
SWU: Switching Unit
Features:
The SWU implements data
switching among the boards in a
subrack through the backplane
and data switching among
subracks through cascading
interfaces provided by the SWIs.
Dual Planes Switching: Base,
Fabric, and TDM
1. Ejector lever 2. OOS indicator
3. HEALTHY indicator 4. SYSTEM indicator
5. BMC COM serial port 6. SYS COM serial port
7. LAN0 port 8. HOTSWAP indicator
9. LAN1 port
Page33
SMM
SMM position in a subrack
The SMM is the management module of a subrack.
The SMM manages all the components in a subrack.
Features:
It manages all hardware components in a subrack.
It implements device management, hot swapping management, alarm management, log management,
asset management, and power management.
It supports the KVM over IP function.
Two SMMs reside at the bottom of a subrack. They work in active/standby mode, 1+1 redundancy.
Data synchronization between the active and standby SMMs is implemented through the dedicated
IPMB and interface.
Page34
ORM001102 UMG8900
Hardware Introduction
Issue
Wireless Curriculum and Development Section
Cabinet
The UMG8900 adopts the N68-22 cabinet.
The height of the N68-22 cabinet is 2200
mm, the width is 600 mm, and the depth is
800 mm.
The usable rack space in the N68-22
cabinet is 46 U.
One cabinet can accommodate a
maximum of three standard 19-inch frames.
Page 36
Position of UMG on the Network
. . 37
Bearer Type of MGW
MGW provides TDM/ATM/IP interface for bearer network transporting 3G
CS traffic
By adopting independent cards to provide TDM/ATM/IP interface , MGW
can be flexibly configured according to operator’s option and
networking requirements
The traffic interface include:
E1, ET-155 for TDM interface,
STM-1 for ATM interface
FE, GE for IP interface
. .
Chapter 2 Boards
2.2.1 Operation and Maintenance
Subsystem
2.2.2 Gateway Control Subsystem
2.2.3 Packet Service Processing
Subsystem
2.2.4 Service Resource Subsystem
2.2.5 TDM Service Processing
Subsystem
2.2.6 Cascading Subsystem
2.2.7 Clock Subsystem
2.2.8 Signaling Transfer Subsystem
Page 39
Overview
Introduction to the System
Operation LMT/iManager MGC(MSOFTX3000)
Maintenance
Subsystem
OMU/MPU PPU
Packet
Gateway
MBus Switch CMU Control
Subsystem
Grouping Service
Processing Subsystem
ATM Service
A4L/
ASU Resource
A4L
EAC ASU
Subsystem
GE
E8T/ Switch
IP E8T/ RPU VPU
E1G HRU
G1O OMB/NET
Cascade Subsystem
TNU/TCLU SPF
BLU/FLU/NLU
CLK Message
E32/ S2L/
E32/ S2L/ Transmit
T32 S2E
T32 S2E Subsystem
Clock
Subsystem TDM
TDM Service Processeing Subsystem
Page 40
Slot Layout and Feature Changes
SSM-32 chassis: provides the 12 G switching capability, up to 12 packets interfaces in the front and rear, and 1125 CPU.
SSM-160 chassis: provides the 48 G switching capability, up to 12 packet interfaces (1 G/slot) in the front, and 24 packet
interfaces (2 G/slot) + 4*10 GE in the rear, and provides 4 GE cascading interfaces to the TND. The OMB is divided into
the CME and OME slots.
02 C 02 C
V V A A V VS M M M SV V S S V V V V V V V S C O O C S V V V V V
M
P P S S P PP P U U
P P P P P P P P P P P P M M M M P P P P P P
C P C
E E E E
U U U U U UF B M
B M FU U F F U U U U U U U F F U U U U U
U U
C C A A E E T T S S H H E E C C E E S S T T S S H H H H
L L 4 4 3 3 N N 2 2 R R 3 3 L L 6 6 4 4 N N 4 4 R R R R
K K L L 2 2 C C L L D D 2 2 K K 3 3 L L D D L L D D D D
SSM-32 chassis SSM-160
SSM-32 chassis of UMG R08C03: supports the 96 K TDM switching and does not support the chassis
GE packet cascading.
SSM-160 chassis in UMG R09C00: supports the 160 K TDM switching. The CN5434 enhances the call interconnection capability and
Improved bus rate
supports integrated forwarding. The chassis also supports 4GE packet cascading and replaces the NLU.
Enhanced integration
The number of STM-1 optical interfaces increases from 2 to 4.
The TDM bus rate increases from 4 K per slot to 16 K per slot.
The number of E1 interface boards increases from 32E1 to
The TDMs can be cascaded up to 64 K. 63E1.
The CME adopts 750D to enhance the call processing
capability.
The TND adopts CN5434 to enhance the interconnection
A single frame VoIP increases from 20KErl to 32KErl. capability, meeting the requirements of integrated forwarding.
Page 41
OMU and MPU
• Implementing control information interaction between
the boards and inter-frame control information
interaction as well as interface management in the case
of multiple frames subtended.
• Monitoring and managing the status of all boards in the
frame.
• Implementing status querying, monitoring and power-on
or power-off management to the equipment through
special maintenance module, and controlling board
power-on sequence to avoid impact from instant current.
Page 42
CMU
• Providing internal interface to connect with the
PPU to implement interaction of H.248 messages.
• Providing interfaces to connect with the RPU, TNU
and TCLU to control the boards to convert media
streams.
• Providing interface to connect with the MPU to
implement data configuration and output alarms,
debugging information and logs.
Page 43
PPU
• Providing the Mc interface to the MGC, B interface to the CMU and
internal interfaces to the MPU.
• Receiving H.248 messages through Mc interface, implementing H.248
protocol stack processing, and forwarding the H.248 messages to the CMU.
• Assembling H.248 messages received from the CMU, then performing
protocol adaptation according to H.248 packet format and sending them to
the MGC.
BSSAP
H.248 SCCP
M3UA
SCTP/UDP
SCTP
IP IP
Stack for Mc interface Stack for SG function
Page 44
TDM service processing subsystem
• MTNU
• It provide switching and subtending function, it
has the master station compare with the TCLU,
it can provide all of the TDM service switching
include the frame TDM service switching which
the MTNU in.
• TCLU
• It provide switching and subtending function,
but it can only provide the frame’s TDM service
switching which the TCLU in.
Page 45
SPF
• It is responsible for processing such protocols as
MTP2/M2UA/ SCTP/IP/ MAC protocols
• It can process 4 2-Mbit/s links and 64 64-kbit/s links of
SS7 signaling over MTP2 layer, or 64 channels of V5
protocol or 128 channels of PRA protocol.
SS7 IP
SEP UMG8900 CSOFTX3000
S7UP S7UP
MTP3 MTP3
M2UA-NIF
M2UA M2UA
MTP2 MTP2
SCTP SCTP
IP IP
MTP1 TDM MTP1 IP
MAC MAC
Page 46
CLK
• CLK is the system clock board, responsible for
receiving line clock signals extracted by interface
boards and external synchronous clock signals
provided by BITS.
• Each MGW frame is configured with two NET boards.
In the main control frame, the clock boards provide
16-kHz clock signals to the NET boards of the frame
through the backplane. In other MGW frames, the
clock boards provide 16-kHz clock signals to the NET
boards through the distributed cables.
• The CLK also outputs external synchronous clock
signals.
Page 47
FLU
• The Front Link Unit (FLU) is the front subtending board
of UMG8900 in the case of multiple frames subtended.
• A couple of FLUs can provide 8-k time-slot of TDM data
subtending channel and 2x1.25 G of GE data subtending
channel for the corresponding back subtending board
BLU.
• FLU has no interface.
Page 48
Confidential Information of Huawei.
.
No Spreading without Permission.
