3 TN_SS004_E1_1 ZXWN GGSN System Architecture

GGSN System ArchitectureV0222

ZTE University

CN Team

TN_SS004_E1_1

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Course Objectives

GGSN System Function

Hardware system overview

Board introduction

Hardware principle




SGSN

RNS

Packet Backbone

GGSN

DNSCG

BC

IP/DDN

HLR

NO.7

Fire Wall

RadiusServer

Web


n Networking Structure of the WCDMA Packet Domain






n GGSN External Interface

P-CSCF






n GGSN Interface Description

Interface Description

Gn Interface between GSN nodes within the same PLMN

Gp Interface between GSN nodes in different PLMN

Gc Interface with HLR

Ga Interface with CG , using GTP΄ protocol

Gi Interface with external PDN





Course Objectives

SGSN System Function

Hardware system overviewBoard introduction

Hardware principle




GGSN Hardware System Overview

n Service shelf

Ñ The shelf is used to combine various circuit boards through

the backplane to form an independent unit.

n GGSN has two kinds of service shelfs

Ñ Level-1 switching shelf

Ñ Control shelf





shelf Backplane Name Meaning

Control shelf BCTC Backplane of Control Center

Level-1 switching shelf BPSN Backplane of Packet switch

network

Service shelf and corresponding backplane





Communication with service shelf


Control subrack

Level-1 switching subrack

Control flow Ethernet

Clock

signal




Course Objectives



Board introductionHardware principle




GLIQV Board

n 1. 2.5G Line Interface Board (GLIQV)

Ñ 1) Function

In GGSN, GLIQV is used as GGLP,

GGUP and GCNT. TX

S D8ACT8

RX

TX

TX

TXACT7 S D7

RX

S D6ACT6

RX

RX

ACT5 S D5

TX

S D4ACT4

RX

S D2ACT2

RX

ACT3 S D3

TX

RX

TXACT1 S D1

ENUM

RST

RX

TX

ACTALMACTEXCH

ENUM RUN

RST

ALMEXCH

RUN

GGUPGGLP

ACT4 SD4

RX

SD1ACT1

TX

ACT3 SD3TX

RX

RX

ACT2 SD2

TX

RX

TX

APBE

RST

ACTEXCH

ALM

ENUM RUN

GCNT

1111

Board introduction




GLIQV Board

n 2) Indicator

n 3) Button

GLIQV has two buttons: EXCH and RST

n 4) Interface

When GLIQV used as GGLP, there are 2 pair of GE fiber interface in the front panel

Name Color Indication Description

ACT1-2 Green Optical interface activationindicator

Indicating currently activated optical interface

SD1-2 Green Optical signal indicator Indicating whether the optical interface has received optical signals

Board introduction




GLIQV Board

n GGLP FunctionÑIt provides two pairs of GE ports, and adopts the

load-sharing working mode between boards. It provides four pairs of external physical GE ports in total.

ÑIt implements such functions as the physical layer adaptation, IP packet checklist, fragmentation, transfer and traffic management. Its processing capability orientation is 2.5 Gbps line-speed processing and transfer, and 1K-stream traffic management.

Board introduction




GLIQV Board

n GGUP Function

ÑIt terminates the GTP-U protocol, restores

outgoing user packet service data packets,

processes the data packets (NAT, tunnel

processing, and data encryption), routes the data

packets according to its content, and forwards the

data packets.

Board introduction




FLIV Board

n 2. FLIV

Ñ 1) Function

In GGSN, FLIV module is used as GFLP

The FLIV board is an interface board with six

FE ports, mainly implementing the functions of

the physical layer adaptation, IP packet

checklist, fragmentation, transfer and traffic

management.

Difference between GGLP is that GFLP can

provide FE interface and GGLP provide GE

interface

Board introduction




FLIV Board

Ñ 2) Indicator

Ñ 3) Buttons

EXCH and RST

Name Color Indication Description

ACT1-6 Green 100 M interface activation indicator

Indicating currently activated the 100 M interface

LINE1-6 GreenStatus indicator of external 100 M access network port 1 ~ 6

On: port 1 is connected;

Off: port 1 is not connected

Board introduction




Course Objectives



Board introduction

Hardware principle




Hardware structure

Hardware principle




System Structure

S P B C LK G

O M P

C G

U S IR P U

N O .7 S ignallingN etw ork

B ITS S Y N S ignal Inpu t

FEF E FE FE

F E FE F E

E 1/T1

F E

N M S

S Y N SignalInpu t

S Y N S ignalO utpu t

Q 3 o r C O R B A

O M C

S erver

O M CC lien t

FE

F EF E

O M CC lien t

S erviceM P

ZX W N G GS N

M edia F low S witch

GG LP GG LP

U M T S P A C K E TS W ITC H N E T W O R K

P D N

G E GE

GEGE /F E

FEF E

GG U P

GE

C on trol F low S witch

Hardware principle




User Plane Principle

n The GGLP cooperates with the GGUP to implement the functions of encapsulation, decapsulation and routing forwarding of the user plane.

n GGLP distinguishes the control plane from the user plane according to the destination IP address, and forwards them to the corresponding board of the control plane or the GGUP board of the user plane.

n The GGUP board receives the user plane data distributed by the GGLP. It terminates the GTP-U protocol, restores outgoing user packet service data packets, processes the data packets (NAT, tunnel processing, and data encryption), routes the data packets according to its content, and forwards the data packets to the corresponding GGLP interface board.

Hardware principle




User Plane Principle

n Multiple GGUPs compose the processing unit of the user

plane of the GGSN. Each GGUP occupies an IP address

of the GGSN user plane.

n In addition, after receiving the routing packet, the

interface board GGLP forwards them to the RPU for

processing.

Hardware principle




IPIP

GLIGLI

PPSSNN

GGUPGGUP

….

….

UIMCUIMCUIMCUIMC

GLIGLIGGUPGGUP GLIGLIGGLPGGLP

GLIGLIGGLPGGLP

UIMC/CHUB

SMP SMP OMPSPBOMP

UIMC/CHUB

USI

NMS

SIPI SMP SMPSMPSMPCLKG

CGE1

…

IPIP

L1 switching

Control Frame

Services Flow

Control and signaling flow

ZXWN GGSN User Plane Signaling Flow

Hardware principle




Control Plane Signal Flow

n RPU, SMP/OMP makes the control plane of GGSN,

responsible for the routing protocol processing, GTP-C

processing and system management and maintenance

n SMP process application layer signal (session processing

signal, MAP) , and it has the function of generating CDR,

making statistics etc.

n MP of GGSN send CDR to CG from USI.

Hardware principle




IPIP

GLIGLI

PPSSNN

GGUPGGUP

….

….

UIMCUIMCUIMCUIMC

GLIGLIGGUPGGUP GLIGLIGGLPGGLP

GLIGLIGGLPGGLP

UIMC/CHUB

SMP SMP OMPSPBOMP

UIMC/CHUB

USI

NMS

SIPI SMP SMPSMPSMPCLKG

CG E1

…

IPIP

Services Flow

Control and signaling flow

L1 switching

Control Frame

ZXWN GGSN Control Plane Signaling Flow

Hardware principle







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3 TN_SS004_E1_1 ZXWN GGSN System Architecture