01-03 System Architecture

HUAWEI UMG8900 Technical Manual - System Description Contents

Issue 04 (2006-11-27) Huawei Technologies Proprietary i

Contents

3 System Architecture...................................................................................................................3-1 3.1 Physical Architecture.....................................................................................................................................3-2

3.1.1 Cabinet Appearance .............................................................................................................................3-2 3.1.2 Frame Appearance ...............................................................................................................................3-3

3.2 Hardware Architecture ..................................................................................................................................3-5 3.2.1 Hardware Fundamentals ......................................................................................................................3-5 3.2.2 Cabinet Architecture ............................................................................................................................3-6 3.2.3 Frame Architecture...............................................................................................................................3-9 3.2.4 Logical Architecture...........................................................................................................................3-10

3.3 Software Architecture..................................................................................................................................3-15 3.3.1 Overview of Software Architecture ...................................................................................................3-15 3.3.2 Host Software.....................................................................................................................................3-15 3.3.3 LMT Software....................................................................................................................................3-17

Figures HUAWEI UMG8900

Technical Manual - System Description

ii Huawei Technologies Proprietary Issue 04 (2006-11-27)

Figures

Figure 3-1 Front view of an N68-22 cabinet ......................................................................................................3-2

Figure 3-2 Front view of an SSM-256 frame .....................................................................................................3-3

Figure 3-3 Front view of an SSM-32 frame .......................................................................................................3-4

Figure 3-4 Hardware components ......................................................................................................................3-5

Figure 3-5 Structure of the UMG8900 assembly cabinet ...................................................................................3-7

Figure 3-6 Structure of the UMG8900 extended assembly cabinet....................................................................3-8

Figure 3-7 Board deployment in an SSM-256 frame .........................................................................................3-9

Figure 3-8 Board deployment in an SSM-32 frame .........................................................................................3-10

Figure 3-9 Logical components of the SSM-256 hardware..............................................................................3-11

Figure 3-10 Logical components of the SSM-32 hardware..............................................................................3-12

Figure 3-11 Software architecture ....................................................................................................................3-15

Figure 3-12 Host software structue ..................................................................................................................3-15

HUAWEI UMG8900 Technical Manual - System Description 3 System Architecture

Issue 04 (2006-11-27) Huawei Technologies Proprietary 3-1

3 System Architecture

About This Chapter

This chapter describes the hardware and software architecture of the UMG8900. Through this chapter, you can learn the interfaces and components of the UMG8900 in general.

The following table lists the contents of this chapter.

Title Description

3.1 Physical Architecture Describes the physical architecture of the UMG8900

3.2 Hardware Architecture Describes the hardware architecture of the UMG8900

3.3 Software Architecture Describes the software architecture of the UMG8900

3 System Architecture HUAWEI UMG8900


3-2 Huawei Technologies Proprietary Issue 04 (2006-11-27)

3.1 Physical Architecture 3.1.1 Cabinet Appearance

The UMG8900 is placed in N68-22 cabinets provided by Huawei.

The front view of an N68-22 cabinet is shown in Figure 3-1.

Figure 3-1 Front view of an N68-22 cabinet



An N68-22 cabinet has a 46 U inside space (1 U = 44.45 mm [1.75 in.] = 1.75 inches). It comprises a power distribution frame, three semi-integrated frames, a cabling trough, multiple filler panels, a rack, multiple guide rails and one or more side hang fiber coilers. It is supplied with –48 V/–60 V DC power. It conforms to IEC297 standards and meets the requirement for flexible module configuration.

The N68-22 cabinet can adopt the front and back maintenance modes, and support upward and downward cabling modes. The N68-22 cabinet can be placed and connected with cables based on the actual conditions of the equipment room.

In addition, the N68-22 cabinet adopts the standard 19-inch structure. Other frames based on the standard 19-inch structure can be placed in free space of the cabinet to improve the utilization of the equipment room.

3.1.2 Frame Appearance The UMG8900 supports the SSM-256 and SSM-32 frames. Both types of frames adopt the standard 19-inch structure and are completely the same in appearance.

The front view of a UMG8900 SSM-256 frame is show in Figure 3-2.

Figure 3-2 Front view of an SSM-256 frame

An SSM-256 frame has 32 front and back slots in total. In the main control frame, the MOMU/MNET boards are configured by default. In a service frame, the MMPU/MNET boards are configured by default.




The front view of a UMG8900 SSM-32 frame is shown in Figure 3-3.

Figure 3-3 Front view of an SSM-32 frame

An SSM-32 frame has 28 front and back slots in total. In the main control frame, the MOMB/MTNC boards are configured by default. In a service frame, the MMPB/MTNC boards are configured by default.

A fan box is integrated at the bottom of a cabinet. On the back of a cabinet, there are power input and monitoring interfaces as well as the dual in-line package (DIP) switches that are used to set frame No.

The UMG8900 frame is a semi-integrated frame with a fan box. The frame provides front and back slots in pair to hold boards. The frame is 12U in height and the middle 9U is for boards. A front board is 9U in height while a back board is 8U. Thus, 1U at the back of the frame is for the filtering box.

Because a front slot differs from a back slot in height, front and back boards cannot be inserted crossly.



3.2 Hardware Architecture 3.2.1 Hardware Fundamentals

The components of the UMG8900 are show in Figure 3-4.

Figure 3-4 Hardware components

LMT

Main controlframe

Centralswitching frame

Serviceframe

Serviceframe

Extended control frame

SIWF

When the UMG8900 works as a VMSC, it needs to attach an SIWF to provide the IWF. The UMG8900 and the SIWF connect with each other by FE and E1/T1, and communicate through the internal protocol. Except the above case, no SIWF frame needs to be configured.

In the case of all SSM-256 frames, the UMG8900 frames can be logically classified into the main control frame, central switching frame, service frame and control frame. The main control frame is the control and management center of the equipment and also provides the service processing function. The central switching frame provides switching and cascading functions. The service frame provides the service processing function. The control frame only processes call control messages but cannot process bearer services.

In the case of all SSM-32 frames or SSM-32 and SSM-256 mixed applications, an SSM-256 frame works as the central switching frame or the main control frame works as the central switching frame at the same time. No control frame is configured.




3.2.2 Cabinet Architecture The UMG8900 supports two types of cabinet configuration. One type is the UMG8900 assembly cabinet, where up to three frames of the UMG8900 itself can be configured. The other type is the UMG8900 extended assembly cabinet, which is used when the SIWF is configured.

If the capacity requires more than two frames and an SIWF frame is configured, the two types of cabinets are needed at the same time. The two types of cabinets are the same in structure and both use the N68-22 cabinets. The difference lies in the internal components configured in the cabinets.



The structure of the UMG8900 assembly cabinet is shown in Figure 3-5.

Figure 3-5 Structure of the UMG8900 assembly cabinet

6

1 2

7

8

7

7

8

8 8

8 8

5

5

3

5

4

4

4

(1) Front view (2) Rear view (3) Power distribution frame (4) MGW frames (5) Filler panels (6) Wiring bar (7) Rear cabling trough (8) Side hang fiber coilers




The structure of the UMG8900 extended assembly cabinet is shown in Figure 3-6.

Figure 3-6 Structure of the UMG8900 extended assembly cabinet

1

3

2

12

11

13

4

5

4

4

8

6

7

9

8

10

(1) Front view (2) Rear view (3) Power distribution frame (4) Filler panels (5) SSM frame (6) Filler panel (7) LAN Switch (8) LAN Switch cabling trough (9) SIWF frame (10) Filler panel (11) Rear cabling trough (12) Wiring bar (13) Side hang fiber coilers

In actual networking of the UMG8900, some factors need to be considered. These factors include the cooperation with an SIWF, only E1/T1 interface applications, SSM-256 self-cascading, SSM-32 self-cascading, and SSM-32 and SSM-256 mixed cascading. Therefore, the rules for configuring frames and cabinets are as follows:

When only E1/T1 interfaces are used, at most 24 E32/T32 boards can be configured in a single cabinet for the sake of easy cabling. If the E1/T1 application exceeds the above capacity, the number of service frames in the cabinet need to be reduced.



The central switching frame provides only cascading interfaces but no service interface. Therefore, two service frames can be configured in the cabinet where the central switching frame is located. The control frame provides only FE service interfaces. Therefore, two service frames can also be configured in the cabinet where the control frame is located or the control frame can be placed in a cabinet where two service frames are already configured.

When an SIWF frame is configured, the main control frame and the SIWF frame share a cabinet numbered 0. In the case of multi-frame cascading, service frames are configured according to the above rules.

Cabinets are numbered from left to right. Frames are numbered from bottom to top. The main control frame is fixed to use logical frame No.1. The central switching frame is

fixed to use logical frame No.0. When the main control frame works as the central switching frame at the same time, the central switching frame has no independent frame No.

In actual applications, if not only E1/T1 interfaces are used, frame configuration can be adjusted according to the E1/T1 interfaces configured in frames after the site engineering survey. It is recommended to install three frames in a cabinet to increase the usability of the cabinet and reduce the used space of the equipment room.

3.2.3 Frame Architecture An SSM-256 frame and an SSM-32 frame mainly differ in the service processing capacity that a single frame provides, mostly involving the TDM switching capacity. An SSM-256 frame provides 256 K TDM switching capacity while an SSM-32 frame provides 32 K TDM switching capacity. In addition, an SSM-256 frame and an SSM-32 frame differ in the main control boards and the slots used by the boards.

The board deployment in an SSM-256 frame is shown in Figure 3-7.

Figure 3-7 Board deployment in an SSM-256 frame

COMMON

COMMON

OMU/MPU

OMU/MPU

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

Back

Front

COMMON

COMMON

NET

NET

COMMON

COMMON

COMMON

COMMON

TNU

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

TNU

An SSM-256 frame provides 16 front and back slots respectively. The OMU, MPU, TNU and NET boards use fixed slots. Other slots are common service slots.

In the SSM-256 frame, the physical board of the OMU/MPU is the MOMU/MMPU and the physical boards of the TNU are the MTNU/TCLU/MTNB.




The board deployment in an SSM-32 frame is shown in Figure 3-8.

Figure 3-8 Board deployment in an SSM-32 frame

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

Back

Front

COMMON

COMMON

TNU

TNU

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

OMU OMU

MPU MPU

An SSM-32 frame is the same as an SSM-256 frame in appearance and structure and provides front and back slots in pairs to hold boards. An SSM-32 frame provides 28 usable slots in total. One main control board OMU/MPU and the corresponding back board TNU occupy two slots in the middle. The master and slave OMU/MPU and TNU boards occupy total four slots.

In the SSM-32 frame, the physical board of the OMU/MPU is the MOMB/MMPB and that of the TNU is the MTNC.

Except the main control boards, most boards in an SSM-32 frame are the same as those in an SSM-256 frame.

The common slots can be inserted with various service boards. The CLK board is always inserted in No.0 or 1 back slot in the main control frame. Some front and back boards must be inserted opposite to each other. For example, if a front slot is inserted with a service board HRB, the corresponding back slot must be inserted with an interface board such as an E8T, P4L or E1G.

3.2.4 Logical Architecture The UMG8900 uses the SSM-256 and SSM-32 frames. The hardware functional modules for the two types of frames differ a little.



For the SSM-256 frames, the logical components of the UMG8900 hardware are shown in Figure 3-9.

Figure 3-9 Logical components of the SSM-256 hardware

E8T/E1G/P4L/P1H

Signalingadaptation

moduleCascading

moduleManagement and

control module

GPSBITS

E1/T1/SDH

TDM processingmodule

Serviceresourcemodule

Packet processingmodule

FE/GE/POS

TNU NET

TDM GE FE

PPU/CMU

MPU/OMU

BLU/FLU

SPF

E32T32S2L

CLK

HRBVPU

A4L/EAC/TAC

ATMASU

8k Hz




For the SSM-32 frames, the logical components of the UMG8900 hardware are shown in Figure 3-10.

Figure 3-10 Logical components of the SSM-32 hardware

GPSBITS

E1/T1/SDH

OMU/MPU

TDM processingmodule

Serviceresourcemodule

Packet processing andinterface module

TNU

FE/GE/POS

Management andcontrol module

Signalingadaptation

module

8k Hz

TDM GE FE

CLK

E32/T32/S1L

VPU

HRB

SPF PPU/CMU

E81/E1G/P4L/P1H

ATM

ASU A4L/EAC/TAC

The UMG8900 accesses and processes IP/ATM/TDM bearer services, interacts with the MGC, processes media resources, and implements adaptation and transparent transmission of signaling. The UMG8900 also provides auxiliary functions such as the management and maintenance of the device, the clock and cascading functions.

Based on the functions and the distributed modular architecture, the hardware system of the UMG8900 can be divided into:

Media gateway control and management module TDM processing module Service resource module Packet processing module Signaling adaptation module Cascading module

The modules are described as follows.

Gateway Control and Management Module The gateway control and management module mainly performs the following two functions:

Under the control of the gateway controller, this module invokes various bearer and service resources within the UMG8900, sets up service bearers and processes service stream formats.



This module is responsible for the management and maintenance of the UMG8900. The UMG8900 adopts the client/server mode. The client local maintenance terminal (LMT) connects with the BAM of the UMG8900 to implement maintenance and management operations on the UMG8900.

The PPU/CMU board provides the gateway control function. The OMU/MPU board provides the management and maintenance function. The OMU/MPU board can also provide the gateway control function. In small-capacity networking, the PPU/CMU board is optional.

The PPU and CMU boards can cooperate to provide the gateway control function. You can configure this feature through software flexibly.

When the PPU and CMU boards cooperate to provide the gateway control function, the PPU resolves and encapsulates the gateway control protocol H.248 while the CMU invokes and manages the resources within the UMG8900 based on the gateway control messages.

The physical board corresponding to the PPU is the MPPB. The physical boards corresponding to the CMU are the MCMF and MCMB. The physical boards corresponding to the OMU are the MOMU and MOMB. The physical boards corresponding to the MPU are the MMPU and MMPB. The MOMU/MMPU can only be configured in the SSM-256 frame while the MOMB/MMPB can only be in the SSM-32 frame.

Packet Processing Module The packet processing module includes two parts: packet switching, and packet processing and interface.

The packet switching module switches packet services of the gateway. For the SSM-256 frame, the NET board performs this function and the corresponding physical board is the MNET. For the SSM-32 frame, this function is embedded in the OMU/MPU board in the gateway control and management module and the corresponding physical board is the MOMB/MMPB.

For the SSM-256 frame, the packet switching module provides 16 GE packet switching capacity. For the SSM-32 frame, the packet switching module provides 12 GE packet switching capacity.

The packet processing and interface module processes packet service bearers of the gateway and provides hardware interfaces for packet services.

The UMG8900 provides two packet service bearer modes: IP and ATM. The two modes correspond to different hardware types of boards for the two bearers.

The hardware of the packet processing and interface module mainly includes the HRB, E8T, E1G, P1H, P4L, ASU, A4L, EAC and TAC boards. The HRB and its interface board E8T/E1G/P4L/P1H process the IP bearer. The ASU and its interface board A4L/EAC/TAC process the ATM bearer. The corresponding physical boards are the MHRU, MRPU, ME8T, MG1O, MP1H, MP4L, MASU, MA4L, MEAC and MTAC.

TDM Processing Module The TDM processing module includes three parts: TDM interface, clock processing and TDM switching.

The TDM interface module provides TDM interfaces of the UMG8900 and supports extracting line clocks as clock reference sources. This module mainly includes the E32, T32, S2L S1L and PIE boards. The corresponding physical boards are the ME32, MESU, MT32, MS2L, MS1L, and MPIE.




The MS2L can only be configured in the SSM-256 frame while the MS1L can only be in the SSM-32 frame.

The clock processing module provides clock signals needed and supports access of various clock reference sources. This module mainly includes the CLK and the corresponding physical board is the MCLK.

The UMG8900 supports two clock modes. One mode is to provide the clock through the CLK boards, which can provide stratum-2 or stratum-3 clock signals. The other mode is to provide the clock through the TNU (MTNC) boards, which can provide only stratum-3 clock and can only be configured in the SSM-32 frame.

The TDM switching module mainly includes the TNU boards. In the SSM-256 frame, the corresponding physical boards are the MTNU, TCLU and MTNB. In the SSM-32 frame, the corresponding physical board is the MTNC.

Service Resource Module The service resource module processes media stream formats and provides resources for service connection.

The hardware of this module mainly includes the VPU and ECU boards. The ECU provides the EC function. The VPU can provide all the functions of the ECU and SRU. The corresponding physical boards are the MVPB, MVPD, MTCB, MTCD and MECU.

The MTCB/MVPB boards can be configured only in the SSM-256 frame while the MTCD/MVPD boards can be in the SSM-256 frame and SSM-32 frame.

When the UMG8900 supports the voice over IP (VoIP) service, the HRB + VPU mode is adopted. In the case of only TDM networking, the VPU is configured to perform announcement playing and digit collecting functions.

Signaling Adaptation Module The signaling adaptation module adapts the signaling of the access network and PSTN to the signaling of the IP packet network.

This module cooperates with the TDM processing module, packet processing module and gateway control and management module to adapt and forward signaling.

This module includes the SPF. The corresponding physical board is the MSPF.

Cascading Module The UMG8900 supports different application capacities through the single-frame and multi-frame cascading modes. The cascading module provides the cascading of packet, TDM and control service streams in the multi-frame cascading mode.

The BLU and FLU cooperate with the packet and TDM service processing modules to perform the function of the cascading module.

The physical board corresponding to the BLU is the MBLU. The physical board corresponding to the FLU is the MFLU.

Cascading boards can be used only in the SSM-256 frame.



The NLU board can also be used for cascading and its physical board is the MNLU. The NLU board is mainly used for the GE packet cascading between SSM-32 frames or the cascading between SSM-32 and SSM-256 frames.

3.3 Software Architecture 3.3.1 Overview of Software Architecture

The software of the UMG8900 includes two parts: host software and LMT software, as shown in Figure 3-11.

Figure 3-11 Software architecture

BAM LMT

OMU

Host software includes BAM and service application software. The LMT software communicates with the host by way of the BAM.

3.3.2 Host Software The structure of the host software is shown as Figure 3-12.

Figure 3-12 Host software structue

Packetserviceprocessmodule

Hardware platform

Narrowbandserviceprocessmodule

Service resourceprocess module

Signalingprocessmodule

Gatewaycontrolmodule

Operation &maintenance

module

Underlying support software

The host software includes:

Underlying support software module




Narrowband service process module Packet service process module Signaling process module Service resource process module Gateway control process module Operation and maintenance module

Underlying Support Software Module Its function is to serve as support for upper-layer applications such as system process, system interruption, memory management and memory assignment. The underlying support software is developed based on the Vxworks real-time operating system and Huawei distributed object-oriented programmable real-time architecture (DOPRA) and versatile routing platform (VRP).

Narrowband Service Process Module Its function is to access TDM bearer services and connect timeslots under the control of the gateway control module; implement signaling gateway functions and play announcement by working with the signaling process module and service resource process module.

Packet Service Process Module Its function is to access and handle IP and ATM packet services under the control of the media control module; fulfill the embedded signaling gateway functions by working with the signaling gateway process module.

Signaling Process Module Its function is to adapt and resolve signaling, implement signaling adaptation conversion and manage signaling links.

Service Resource Process Module Its function is to process service resources, including voice codecs conversion, tone signals detection and report.

Getaway Control Module Its function is to translate H.248 protocol to the handling of internal resources by communicating with an MGC. This module is the core control unit of the UMG8900.

Operation and Maintenance Module Its function is to provide external interfaces for device operation and maintenance.



3.3.3 LMT Software The LMT software can be installed on a common PC. Through the LMT, you can perform operation and management on the UMG8900.

The LMT system consists of four parts:

Operation and Maintenance System Alarm Management System Performance Management System Traceviewer

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01-03 System Architecture