1

Sidevõrgud IRT 0020

loeng 3 25. sept. 2005

Avo Ots

telekommunikatsiooni õppetoolraadio- ja sidetehnika instituut

avots@lr.ttu.ee

2

Mudeli täiendused

DiffServDiffServ

7 Application7 Application

6 Presentation6 Presentation

5 Session5 Session

4 Transport4 Transport

3 Network3 Network

2 Data Link2 Data Link

1 Physical1 Physical

e. g. Workflowe. g. Workflow

G.711 / G.723.1 / G.729G.711 / G.723.1 / G.729

H.323 / H.450 / RTPH.323 / H.450 / RTP

TCP / UDPTCP / UDP

IPIP

MACMAC

Transmission MediumTransmission Medium

802.1 D802.1 D

3

Kihid

7

6

5

4

3

2

1 Füüsiline (ühendus)

Kanal

Võrk

Transport

Seanss

Esitlus

Rakendus Application

Presentation

Session

Transport

Network

Data link

Physical

SSL, WSP

RFC 791 IP,RFC 792 ICMP

TCP RFC 793, UDP RFC 768

WAE, HTTP, RFC821,822

ISO 8859-15

IEEE 802.11a

Cat5, RS-232D

4

Kvaliteet

5

Sidesüsteemi mõjutavad

InterceptionFraud

Fraud

Fraud

Hacker

Viruses

Internet

VPN

6

Kvaliteet IP-võrgu kaudu

IP(LAN)

Router

Peakorter

Harukontor

IP(WAN)

IP(LAN)

Router

QoS

The Internet

Every machine transparently connected to

every other

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The Problem• only nodes on the same physical/link layer

network could communicate

9

Solution

Gateways

10

TT T

GW

GW

GW

SCN

MCUGK

Piirkonnad ja piirpinnad

TT

Juurdepääsu viisid võrkuTerminaal Raadioühendus Võrk Teenused

Phone

PDA

laptop

60 GHz

40 GHz

17 GHz

5 GHz

WLAN

WLL

Satellite

ATM

Internet

Intranet

……..

speech

video

QoS data

best-effort data

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STM 1 155 Mb/s

VCI-100VCI-101

VCI-100VCI-101

VPI-10, 50 Mb/s

VPI-20, 60 Mb/s

Virtuaalsed teed ja kanalid (VPI, VCI)

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WCDMA kanalid

BaseStation

(BS)

UserEquipment

(UE)

P-CCPCH- Primary Common Control Physical ChannelSCH - Sync Channel

P-CPICH - Primary Common Pilot ChannelS-CPICH - Secondary Common Pilot Channel(s)

Channels broadcast to all UE in the cell

DPDCH - Dedicated Physical Data Channel

DPCCH - Dedicated Physical Control Channel

F-PDSCH - Physical Downlink Shared Channel

Dedicated Connection Channels

PICH - Page Indication Channel

Paging Channels

S-CCPCH - Secondary Common Control Physical Channel

PCPCH - Common Physical Packet Channel

AP-AICH - Acquisition Preamble Indication Channel

CD/CA-AICH - Collision Detection Indication Channel

CSICH - CPCH Status Indication Channel

PRACH - Physical Random Access Channel

AICH - Acquisition Indication Channel

Random Access and Packet Access Channels

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N. AmericaN. America

Central & S. AmericaCentral & S. America

W. & E. EuropeW. & E. Europe

Middle East &Middle East & AfricaAfrica

APACAPAC2.5 & 5.8 GHz2.5 & 5.8 GHz

2.5, 3.5 & 5.8 GHz2.5, 3.5 & 5.8 GHz

3.5 & 5.8 GHz3.5 & 5.8 GHz

3.5 & 5.8 GHz3.5 & 5.8 GHz

3.5 & 5.8 GHz3.5 & 5.8 GHz

Licensed Bands• 2.5GHz (2.3-2.4; 2.5-2.7)

• 3.5GHz (3.3-3.7)

Unlicensed Band• 5.8GHz (5.25-5.85)

Spectrum Usage

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Radio Resource Control (RRC)

Medium Access Control (MAC)

Transport channels - grouped by method of transport

Physical layer

Layer 3

Logical channels - grouped by information content - User Data - Control and signaling

Layer 2

Layer 1

Air InterfaceDirect RRC control of the physical layer

Physical channels Physical Channels Distinguished by: - RF Frequency - Channelization Code - Spreading Code - Modulation (I/Q) Phase (uplink) - Timeslot (TDD mode)

UTRAN OSI Model

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Vastastikused häired

Interference Margin (dB) and Load Factor

0

5

10

15

20

25

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Load Factor

Inte

rfer

ence

Mar

gin

(d

B)

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Side loomine (connection establishment)

BA

Nõudlus

Vastus (kinnitus)

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Network structure (TUT)

TUT corenetwork

TUT corenetwork

Tietotalo”intra”

networks

Tietotalo”intra”

networks

Internet

Internet

Tietotalopublic access

network

Tietotalopublic access

network

Main housepublic access

network

Main housepublic access

network

Main house”intra”

networks

Main house”intra”

networks

- public access networks (PAN) isolated from other networks in the edge routers

- access from PAN to Internet controlled by access controllers

- department ”intranets” may be protected with access control lists / filters in the edge routers

- VLANs are used to separate access controllers to own access controller segment

- public access network is considered a hostile network like the Internet

accesscontroller

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ISO OSI vs DoD mudel

Process/

Application

Host-to-Host

Internet

Network Access

7654321

20

T

T G T

T R R

T T

T

Võrkude ja teenuste ühendamine

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ATerminal

ATerminal

B Terminal

B Terminal

APortal

BPortal

TransmissionTransmissionAccessAccess AccessAccess

Session ServiceSession Service

Control ServiceControl Service

A Home ServiceA Home Service B Home ServiceB Home ServiceA User Service Management

A User Service Management

B User ServiceManagement

B User ServiceManagement

TransmissionTransmissionAccess ServiceAccess Service Access ServiceAccess Service

TerminalTerminal TerminalTerminalTelecom basic service/call controlTelecom basic service/call control

Off-line customer managementOff-line customer management

Extended call control and IN chargingExtended call control and IN charging

Linear Service Architecture in Legacy Network: Static Services

Two-Dimension Service Architecture in NGN: Active Services

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Protokollidhttp://www.private.org.il/tcpip_rl.html

http://www.eix.co.uk/Ethernet/

http://www.mfaforum.org/education/atm_presentations.

shtml

http://www.mfaforum.org/education/atm_cs.shtml

http://www.mfaforum.org/tech/superdemo_2004.pdf