0WB080003(slide)SGSN9810 V800 (UAG)Hardware System-20090228-B-V2.0

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Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.

UAG Hardware System

Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page2

References

SGSN V8R8 UAG product manual


Objectives

Upon completion of this course, you will be able to:

Describe UAG product networking

Outline UAG logical structure

Outline UAG hardware structure

Outline UAG board function

Describe UAG signalling and data flow


Contents

1. UAG Overview

2. UAG Hardware Structure

3. UAG Signalling and Data Flows


Contents

1. UAG Overview




The Location of UAG

Internet

PSTN

UAGUAG


The Function of UAG

Forwarding the CS signalling and Service Data

Forwarding the PS signalling and Service Data

UAP Authentication

Functions of the NTP Client

Routing Function


Contents

1. UAG Overview





2.1 UAG Logical Structure

2.2 UAG Hardware Structure

2.3 UAG Switching Subsystem

2.4 UAG OAM Subsystem

2.5 UAG Clock Subsystem

2.6 UAG Interface Subsystem

Contents


UAG Logical Structure

DataData forwarding forwarding subsystemsubsystem

Signalling Signalling processing processing subsystemsubsystem

NTPNTPsubsystemsubsystem

OAM OAM subsystemsubsystem

Clock Clock subsystemsubsystem

ATM ATM switching switching subsystemsubsystem

AP/MGW/AP/MGW/MSC ServerMSC ServerSGSN/NTPSGSN/NTP/AHR/AHR

M2000/M2000/LMTLMT

BITSBITS


UAG Subsystem Function O&M Subsystem

The O&M subsystem offers the external O&M maintenance interface and implements the functions of system maintenance, configuration, performance, alarm, and log.

The hardware function is implemented by the UOMU and UFSU boards.

Clock Subsystem The clock subsystem obtains clock signals from the BITS and

the STM-1/STM-4 optical interfaces, and offers the stratum-2 clock to the STM-1/STM-4 optical interface of the UAG.

The hardware function is implemented by the UCKI board.


UAG Subsystem Function ATM Switching Subsystem

The ATM switching subsystem implements the ATM exchange and interconnection among subracks.

The hardware function is implemented by the URCU, UPIU, and UFCU boards.

NTP Subsystem The NTP subsystem implements the function of the NTP client

and obtains timing information on the IP network from the NTP server.

The hardware function is implemented by the UGTP board.


UAG Subsystem Function Signalling Processing Subsystem

The signalling processing subsystem processes the eIu and Iu interface signalling, and authorizes and manages the UAP.

The hardware function is implemented by the UASU board.

Data Forwarding Subsystem The data forwarding subsystem offers the eIu interface, the

Iu interface, the Hg interface, and the interface from the UAG to the NTP server. It forwards user data between the eIu interface and the Iu interface.

The hardware function is implemented by the UAFU and UPIU boards









Contents


UAG Cabinet

UAG system uses the

Huawei N68-22 cabinet,

which complies with the

IEC297 and IEEE

standards.

Air deflector

Air deflector

Air deflector

Dummy panel

Power distribution box

PSM subrack

UAFU

UAFU

UASU

UASU

UASU

UASU

URCU

URCU

UASU

UASU

UASU

UASU

UASU

UASU

UALU

UPWR

UPWR

PSM subrack

UAFU

UAFU

UFCU

UFCU

URCU

URCU

UOMU

UOMU

UGTP

UGTP

UALU

UPWR

UPWR

PSM subrack

UPWR

UPWR

PSM subrack

UPWR

UPWR

UAFU

UAFU

UASU

UASU

UASU

UASU

URCU

URCU

UASU

UASU

UASU

UASU

UASU

UASU

UALU

UAFU

UAFU

UASU

UASU

UASU

UASU

URCU

URCU

UASU

UASU

UASU

UASU

UASU

UASU

UALU

UAFU

UAFU


UAG Subrack: Switching Subrack

The switching subrack is configured with the UOMU and UFCU boards. Only one switching subrack is required.

The fundamental functions of the switching subrack are listed as follows:

Forwarding data among the PSM subracks Offering the O&M interfaces

UASU0

UPIU

UPIU

UPIU

UASU

UFCU

UFCU

UAFU

UAFU

UPIU

UACU

UBIU

UACU

UBIU

UFSU

UCKI

UFSU

URCU

UOMU

URCU

UOMU

UGTP

UGTP

UALU

UPWR

UPWR

UPWR

UPWR

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17,18 19,20

UCKI

ULAN

ULAN


UAG Subrack: Extension Subrack

The SGSN9810 can configure 0 to 3 extension subracks.

Extension subracks process only services.

UAFU0

UAFU

UASU

UASU

UASU

UASU

UACU

UBIU

UACU

UBIU

UPIU

UPIU

URCU

UAFU

URCU

UAFU

UASU

UASU

UASU

UASU

UALU

UPWR

UPWR

UPWR

UPWR

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17,18 19,20

UPIU

UPIU









Contents


UAG Switching Subsystem

UBIU

URCU

UPIU

UFCU

UBIU

URCU

UBIU

URCU

FiberFiber

Switching subrackSwitching subrackExtensionExtension subracksubrack

ExtensionExtension subracksubrack


Communication Within Subracks

UPIU

UAFU

UASU

UGTP

BUSBUS

The different boards of the same subrack will use the

bus of the back board to communicate with each other.


Communication Between Subracks Different boards of different subrack will

communicate to each other via URCU/UFCU.

UBIU

URCU

UPIU

UFCU

UBIU

URCU

UGTP

UASU

BUSBUSBUSBUS

Switching Switching Extension Extension Fiber Fiber Fiber Fiber


UFCU

UFCU:

The Frame Connect Unit (UFCU) is the

switching center of UAG.

The UFCU can be inserted in slots 0–5

and 10–15 in the PSM switching

subrack in the front position.RST

CO

M1

0/10

0BT

ALMRUN

ACT

Interface Description Function

COM RJ45 serial port (RS232) Provides the test function of the UFCU to external devices.

10/100BT

10/100 Mbit/s test network port

Provides the test function of the UFCU to external devices.


UFCUIndicator Color Description Meaning Normal

State

RUN Green Board running indicator

FPGA loading: flashing in the frequency of 1 HzNormal running: flashing in the frequency of 0.5 Hz

Flashing in the frequency of 0.5 Hz

ALM Yellow Board fault indicator

OFF: board working normallyON: board failure

OFF

ACT Green 1+1 active/standby state indicator

OFF: standby boardON: active board

-

Blue indicator

Blue Hot-swap indicator (at the bottom of the panel)

OFF: board working normallyON: Before clipping the ejector lever after inserting the board into the subrackAfter loosing the ejector lever when the board is switched onCompliable to the hot swapping specifications. You can pull out the UFCU when this indicator is on.

OFF


UFCU Operation Environment The UFCU communicates

with the UPIU, its back board, through the high speed serial port and the configuration network port.

The UFCU communicates with the other boards in the subrack through the data bus.

The UFCU communicates with the URCU in the PSM service subrack through the fiber led out through the UPIU.

UAIC UAIC

UPIU

UFCU

URCU

Optical port Optical port

Data bus

High-speedserial port

Conf.netowrk port


UPIU

UPIU:

The back board of UFCU/UAFU.

Providing Ethernet or Giga bit/s or ATM

interface by using different PMC board:

UEEC: 10M/100M Ethernet port;

UEFC: 1000M Ethernet( Giga bps) port;

UAIC: ATM optical port.

UPIU only use UAIC PMC board when

work with UFCU.

LNK

RXTX

M/S-LINK

ACT

ALMRUN

P0

P1

P2

P3

P0

P1

P2

P3

UEEC

UEFC/

UAIC









Contents


UAG OAM Subsystem

LMT

UOMU/UFSUUOMU/UFSU

UFCU/UPIUUFCU/UPIU

URCU/UBIUURCU/UBIU URCU/UBIUURCU/UBIU

UASU..UASU.. UGTP..UGTP..UASU..UASU.. UAFU..UAFU..

Extension Extension Switching Switching

ULANULAN

Upper Eth portLower Eth port

Alarm boxAlarm box

EthEthFiber Fiber Bus Bus

Serial cableSerial cable

COM port


UAG OAM Subsystem

Normal maintenance route:

LMT—UOMU—UFCU—URCU—UGTP/UASU etc.

Software loading route:

(1) LMT—UOMU—ULAN—URCU( switching subrack )—

UFCU ; then;

(2) UOMU—UFCU—URCU—UGTP/UASU etc.


UOMU

UOMU is the OAM center of UAG:

Configuration management, performance

management, security management and

log management

Query control

User or signal tracing

CO

M

ALMRUN

RST

ACT


UFSU

UFSU: Flash Disk Storage Unit, the

backboard of UOMU.

Supports level conversion of the 2-port

asynchronous serial port signals from the UOMU

and provides physical interfaces to two

asynchronous serial ports.

Holds the hard disk of the UOMU and stores

system details such as system configuration data.

Provides external optical port and network port

for the UOMU.

RUN ALM

PWR

CO

M1

CO

M2

10

/100

M0

10

/100

M1

HD

RX

TX

ATM 155M


URCU

URCU: Subrack Control Unit, is the

OAM center of a subrack.

Each PSM subrack is configured with two

URCU boards that are inserted in slot 6 and

slot 8. The URCU boards are configured in

1+1 backup mode.

URCU provide the data transport channel of

different boards in the same subrack or in

different subrack.

CO

M1

0/1

00

BT

ALM RUN

RST

DOMADOMB


UBIU UBIU: Back Interface Unit, is the backboard of URCU.

The UBIU provides external ports for the URCU:

Serial ports

Ethernet port

155Mbit/s optical port

UBIU also handle the clock signal:

Receives the 8K clock signal from the sub-board UFIU of the URCU. ( For extension subrack UBIU)

Receives the 8K clock signal from UCKI. ( For switching subrack UBIU)

8K

_IN

LNK ALM

PWR

8K

_O

UT

10

/10

0M

RXTX

ATM155

CO

M1

CO

M2

CO

M2

+

2M

_O

UT

12

M_

OU

T2


UACU

DOMB DOMA

UACU: Auxiliary Control Unit, cooperate with URCU to perform the management of a subrack.

Each PSM subrack is configured with two

UACU boards inserted in slot 7 and slot 9 in

the rear position.

The URCU in slot 6 is used in co-ordination

with the UACU in slot 9 and the URCU in slot 8

is used in co-ordination with UACU in slot 7.


URCU/UBIU/UACU Cooperation

Bus A Bus B

U

R

C

U

UBIU UBIU

UACU UACU

Optical port

SPB SPB

SPB: Serv ice Processing Board

Optical port

U

F

I

U

U

R

C

U

U

F

I

U

Optical portelectric signal

Async.serial port









Contents


UAG Clock Subsystem

UCKI

UBIU

UPIU UPIU UPIU

PSM servicesubrack

PSM servicesubrack

PSM servicesubrack

. . .

. . .

External clock input

PSM switchingsubrack

Internal clock bus

STM-1 STM-1 STM-1


UAG Clock Subsystem

In the PSM switching subrack, the UBIU receives

clock signals from the UCKI and synchronizes these

signals to the UPIU in this subrack through the

internal clock bus.

The UPIU multiplexes the clock signals to the STM-1

fiber and sends the system synchronization clock to

each PSM service subrack. This guarantees the clock

synchronization of the whole system.


UCKI

UCKI: Clock Unit, It is inserted in slots 13

and 15 in the PSM basic subrack. Each

UCKI occupies two back board slots. BITS1

1

RUN ALM

ACT

BITS2LINE1LINE2

357

2468

91113

15

101214

16

RST

Interface Description Function

BITS1 2 MHz or 2 Mbit/s clock input port Extract 2 MHz or 2 Mbit/s clock signals as the reference source.

BITS2 2 MHz or 2 Mbit/s clock input port Extract 2 MHz or 2 Mbit/s clock signals as the reference source.

LINE1 E1 2 MHz clock input port Extract 2 MHz clock signals as the reference source.

LINE2 E1 2 MHz clock input port Connects the UEPI to extract 2 MHz clock signals as the reference source.

1 to 16 Sixteen 8 kHz clock output ports Provides the clock source for the UEPI in various subracks.


Clock Cable Connection

BITS1BITS1

11

UCKIUCKI

UBIUUBIU(Switching (Switching subrack)subrack)

8k_in8k_inClock cableClock cable

Clock cableClock cable









Contents


UAG Interface Subsystem

UUPPIIUU

UUAAFFUU

UUAASSUU

Switching Switching subsystemsubsystem

eIU interfaceeIU interface

EthEthFiber Fiber

UUAASSUU

UUAAFFUU

UUPPIIUU

UUPPIIUU

UUAAFFUU

UUAASSUU

UUAASSUU

UUAAFFUU

UUPPIIUU

Iu-CS interfaceIu-CS interface

Iu-PS interfaceIu-PS interface

APAP

AHR/AHR/NTPNTP

UUGGTTPP

CSCS

PSPS

Internal connectionInternal connection

APM/NTPAPM/NTP


UAG Interface Subsystem

UPIU

UAFU

UASU

UGTP

eIuinterface

Iu-CS, Iu-PSinterface

Data bus

High-speedserial port

Conf.network port

UEEC/UEFC

UAIC


UAFU UAFU: UMTS AG Forwarding Unit, is the

forwarding front board of the AG.

Forwarding the data on the CS and PS user planes between the AG, the MGW, and the SGSN.

Forwarding the signalling on the elu and Iu interfaces to the UASU for processing.

The UAFU works in the 1+1 active/standby mode.

The number of the UAFUs depends on the number of subscribers. A maximum of 10 couples of UAFUs can be configured in the system.

RST

CO

M1

0/1

00

BT

ALMRUN

ACT


UPIU

UPIU:

The back board of UFCU/UAFU.

Providing Ethernet or Giga bit/s or ATM

interface by using different PMC board:

UEEC: 10M/100M Ethernet port;

UEFC: 1000M Ethernet( Giga bps) port;

UAIC: ATM optical port.

LNK

RXTX

M/S-LINK

ACT

ALMRUN

P0

P1

P2

P3

P0

P1

P2

P3

UEEC

UEFC/

UAIC


UASU UAFU: UMTS AG Signal Unit, is the service

signal processing board. Handling of CS and PS call signalling;

RNC agent;

AP management;

MSISDN access control;

resource management.

The UASU works in the 1+1 active/standby mode. The number of the UAFUs depends on the number of subscribers.

RST

CO

M1

0/1

00

BT

ALMRUN

ACT


UGTP

UGTP: GTP Processing Unit

Processes the GTP user plane signalling, and

stores and manages the user PDP contexts.

NTP function;

IPsec function.

RST

CO

M1

0/1

00

BT

ALMRUN

ACT


Contents

1. UAG Overview




Iu-CS Signalling Flow

UUPPIIUU

UUAAFFUU

UUAASSUU

APAP UUBBIIUU

UURRCCUU

UUPPIIUU

UUFFCCUU

UUBBIIUU

UURRCCUU

UUAASSUU

UUPPIIUU

UUAAFFUU

MSC ServerMSC Server


Iu-CS Data Flow

UUPPIIUU

UUAAFFUU

UUAASSUU

APAP UUBBIIUU

UURRCCUU

UUPPIIUU

UUFFCCUU

UUBBIIUU

UURRCCUU

UUAASSUU

UUPPIIUU

UUAAFFUU

MGWMGW


Iu-CS Signalling Flow

UUPPIIUU

UUAAFFUU

UUAASSUU

APAP UUBBIIUU

UURRCCUU

UUPPIIUU

UUFFCCUU

UUBBIIUU

UURRCCUU

UUAASSUU

UUPPIIUU

UUAAFFUU

SGSNSGSN


Iu-PS Data Flow

UUPPIIUU

UUAAFFUU

UUAASSUU

APAP UUBBIIUU

UURRCCUU

UUPPIIUU

UUFFCCUU

UUBBIIUU

UURRCCUU

UUAASSUU

UUPPIIUU

UUAAFFUU

SGSNSGSN


APM/NTP Signalling Flow

UUPPIIUU

UUAAFFUU

UUAASSUU

APAP

APM flowAPM flow

UUPPIIUU

UUAAFFUU

UUGGTTPP

NTPNTP

NTP flowNTP flow


Summary

UAG is consist of OAM subsystem, ATM switching

subsystem, clock subsystem, NTP subsystem, data

forwarding subsystem and signalling processing

subsystem.

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0WB080003(slide)SGSN9810 V800 (UAG)Hardware System-20090228-B-V2.0

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