department of control engineering distributed real-time systems

Avancerede Datanet Udviklingen i Netværksarkitekturer 1

Department of Control Engineering Distributed Real-time Systems

Avancerede Datanet

Ole Brun MadsenProfessor

Department of Control EngineeringUniversity of Aalborg

Udviklingen i Netværksarkitekturer


MM1: Udviklingen i netværksarkitekturer

MM2: De switchede net

MM3: Network Management, Introduktion

MM4: QoS Quality of Service, Introduktion

MM5: Problemstilliger i Netplanlægning

Forudsætninger: D5-12 Netværk og datakommunikation Kategori: PE Omfang: 1 modul Forudsætninger: D5-12: Netværk og protokoller

Kursusbeskrivelse


MM1:

Udviklingen i netværksarkitekturer - Referencemodeller - Infrastruktur, Switching, Information, Management - Integration og konvergens Den basale infrastruktur - Lokale og globale infrastrukturnet - Andre elementer i infrastrukturen - Services

Kursusbeskrivelse


Karakteristik af udviklingsperioderne

• 60-erne EDB-centraler, Remote Batch

• 70-erne Minier, Remote Login,

• 80-erne Datanet, Kommunikation, Filtransport

• 90-erne PC-er, Elektronisk Post, Internet

• 00-erne ???


Karakteristik af de globale net

• 60-erne TV, Telefoni, Telex, Telegrafi,

• 70-erne TV, Telefoni, Telex, Telegrafi

• 80-erne TV, Telefoni, Telex, Fax, X.25

• 90-erne TV, Telefoni, ISDN, Fax, X.25, X.400, E-mail, Internet

(Multimedie, VoIP, Video on Demand, ……)

• 00-erne ???


Kaos

eller

Standardisering ?


Reference Models

The OSI Reference Model

The Open Systems Interconnection Reference Model, is an internationally standardised 7 layer model for network protocol and services.

The TCP/IP Reference Model

The Transmission Control Protocol over (/) the Internet Protocol Reference Model, is an internationally accepted 4 layer model for network protocol and services.

The GII Reference Models

GII, The Global Information Infrastructure, a world wide initiative to improve the interaction between users, network, IT and information providers and producers



Application

Presentation

Session

Transport

Network

Data Link

Physical

Application

Presentation

Session

Transport

Network

Data Link

Physical

Network

Data Link

Physical

Network

Data Link

Physical

7

6

5

4

3

2

1

The ISO-OSI seven layer model



Application

Transport

Internet

Host

to

Network

Sem

anti

c, S

ynta

x

& D

ialo

g co

ntro

lD

ata

tran

spor

t

7

6

5

4

3

2

1

Application

Transport

Internet

Host

to

Network

The TCP/IP 4-layer Model



Application

Transport

Internet

Host

to

Network

Application

Transport

Internet

Host

to

Network

Network

Data Link

Physical

Network

Data Link

Physical

Internet

Host

to

Network

Internet

Host

to

Network

Gateway Gateway



Semantic

Syntax

Dat

a tr

ansp

ort

Dialog control

Application

Presentation

Session

Transport

Network

Data Link

Physical

Network

Data Link

Physical

7

6

5

4

3

2

1

Transmission

Information

Semantic

Syntax

Data Network

End-to-end

Communication


Example of Early OSI

Tel

ex

Mix

edM

ode

Tel

efax

Vid

eote

x

Mes

sage

H

andl

ing

Fil

e T

rans

fer

Job

Tra

nsfe

r

Vir

tual

T

erm

inal

T.62

CCITT X.214, X.224

CCITT X.215, X.225

BAS

PSTN ISDN CSPDN PSPDN LAN

X.21 X.25

V-series I-series X.21 LAN

ISO

BCS, BSS

X.400

X.409

ISO ISO ISO

ISO


The OSI Application Layer

Virtual Terminal

File Transfere, Access and Management

Job Transfer and Manipulation Message Handling Services

Distributed Transaction Processing

Directory Services

Naming and Addressing

Remote Operation

OSI Management

…………………...


The X.400 MHS

UA

MTA

UA

MTA

MTA

MTA MTA UA

UA

Message Handling Environment

Message Handling System

Protocols:P1P2P3


Intern

ational B

order

MTA

UA

UA

MTA

UA

UA

MTA

UA

UA

MTA

MTA MTA

MTA

MTA

MTA

MTA

UA

UA

MTAMTA

MTA

MTA

MTA

MTA

UA

UA

UA

MTA

UA

UA

MTA UA

MTA

UA

UA

MTAUA

MTA

UA

UA

MTA

UA

UA

PRMD

ADMD ADMD

The X.400 MHS


X.400 X.400

X.400 UA/MTAX.400 UA/MTAP1, P2, P3

The X.400 MHS


X.400 X.400X.400 X.400

X.400 MTA X.400 MTAX.400 UAX.400 UA P1P3 P3

P2

The X.400 MHS


CP-networks Transport networksAcces networks

CP-SAP

CPE

CPE

CPE

CP-SAP

CPE

CPE

CPE CO-SAP

CO-SAP

Cables

Wireless

Cables

Wireless

Network Architecture

LAN MAN WAN

Network Operator(s)End User(s) Network Operator(s)


Network Architecture

TransportSystem

Global COServices

AccesInfrastructure

End userInfrastructure

TransportSystem

Local CPServices

Global distributionInfrastructure

TransportSystem

Global COServices

TransportSystem

Local CPTerminals

CP-network Transport networkAccess network

LAN MAN WAN

Network Operator(s)End User(s) Network Operator(s)



Et verdensomspændende initiativ til at

forbedre samspillet mellem brugere,

netværksudbydere, IT producenter,

informationsudbydere og -producenter

GII, The Global Information Infrastructure


Four Reference Models:

The Enterprise ModelThe Service Provissioning Model The Functional ModelThe Implementation Model

ITU-T Recommendation Y.100 - GII overviewITU-T Recommendation Y.110 - GII principles and framework architecture

A Scenarie Description Methodology

Logical and Physical Networks

ITU-T Recommendation Y.120 - GII scenario methodology



Netværksniveauer

Management

Information

Switching

Infrastruktur


Department of Control Engineering Distributed Real-time SystemsIntegration og konvergens

Telenettet har været karakteriseret af en række specialiserede delnet, der hver især tilbød et veldefineret sæt af services inden for tale, data og video, hvis eneste primære sammenhæng var fælles udnyttelse af den basale infrastruktur på transmissionsniveauet.

Udviklingen frem mod integrerede tjenester og konvergens nødvendiggør udviklingen af en fælles netarkitektur model for det samlede telenet. En model, der er i stand til at rumme de specifikke krav til infrastruktur, som de enkelte tjenester i kraft af deres natur stiller til performance, kapacitet, sikkerhed

De meget store forskelle i de enkelte serviceformers vækst og dermed løbende andel af de enkelte typer af kapacitetsbehov vanskeliggør en optimal udviklingsplan for infrastrukturen.


Department of Control Engineering Distributed Real-time SystemsIntegration og konvergens

Integration• Horisontal Integration• Vertikal Integration

Konvergens• Teknologi• Tjenester


Department of Control Engineering Distributed Real-time Systems

Pri

vate

LAN Local Services

MAN

WANG

lob

al I

nfo

rmat

ion

In

fras

tru

ctu

re

Access ServicesP

ubl

ic

Transport Services

Information ServicesVANS Pri

vate

department of control engineering distributed real-time systems

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