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Kommunikatsiooniteenuste arendusIRT0080

Loeng 7/2009

Avo Otstelekommunikatsiooni õppetool,

TTÜ raadio- ja sidetehnika inst.avo.ots@ttu.ee

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Multi-Dimensional - Wireless

TechnologiesA

pp

lica

tion

s

Services

•2G/3G cellular -> 4Gmobile

•Wireless Local Loop (WLL)

•Broadband Wireless Access (BWA)

•Wireless LAN

•Satellite Wireless

•Microwave Link

•Specialized wireless

• …………………….

•Wireless telephony

•Wireless internet

•Wireless Data

•Specialized services

• …………………..

•Free mobile (drive)

•Restricted mobile (walk)

•Fixed wireless trunking

•Fixed wireless extension

•Fixed wireless access

•Nomadic wireless

• ………………. Standards

•ITU IMT2000

•ITU WAS (JRG8A-9B)

•ETSI UMTS

•TIA IS 41/95/136

•MMDS/LMDS/WCS/UNII

•ETSI BRAN

•IEEE 802.11/15/16

• ……………...

Business

•CDG

•WATM WG

•3GPP/3GPP2

•MWIF

•WCA

•PCIA

•WAP

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Generic access network

Corenetwork

Switchingnode

Residential

Business

Acc

ess

node

Remoteelectronics

Flexibilitypoint

Fibre, copper, radio etc

Customer Last drop Feeder Local exchange Core network

• Often referred to as the “last mile” or “first mile”

• Dominated today by twisted pair copper cable

• Traditionally, has only had to accommodate voice traffic. Now many more demands are being placed on the access network - data, multimedia etc

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Access network topology

PCP - primary cross-connection pointDP - distribution point

Customer connections

4800/.324800/.32

2400/.42400/.4

1000/.41000/.4PCP PCP

PCPPCP

1000/.41000/.4

2400/.42400/.4 1000/.41000/.4

500/.4500/.4

200/.4200/.4

20/.520/.5100/.5100/.510/.510/.5

10/.510/.5

ExchangeExchange

Manhole orManhole orfootway boxfootway box

Distribution PointDistribution Point

E-side cable (pairs/mm)E-side cable (pairs/mm)

D-side cable (pairs/mm)D-side cable (pairs/mm)

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Attenuation

Att

enua

tion

(dB

/km

)

Frequency (kHz)1 1000

0.1

1.0

10

10 100

0.9 mm Cu

0.32 mm Cu

Attenuation is a function of frequency due to the “skin-effect”

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VDSL• Broadband services could do with a higher data transfer rate than ADSL can

support

• The same principles as ADSL (clever DSP) can be applied to address this by limiting the reach of the system

• VDSL supports data rates to over 50 Mbit/s to the customer thereby enabling support of these very broadband services

• The shorter reach of VDSL though means that data must be carried from the exchange to a point close to the customer (see later)

PCP

Exchange Existing E-side Cables Existing D-side Cables

VDSL Cabinet

New Fibre Feed

Bit rate (Mbit/s) Reach Suitability

13 1.5 km FTTCab

26 1.0 km FTTC/FTTB

52 300 m FTTB

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Passive Optical Networks

OLT

SPLITTER

ONU

ONU

ONU

Local

Exchange

PCP

Cabinet

Customer

Premises

Optical Line Termination

Optical Network Unit

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UMA Backhaul Approach

9

10

GSMOB

11

Interference

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LAN / WAN

Voice Network

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VoiceTelephony & Voice Mail

Unified MessagingConferencing

Find-Me-Follow-MeCall Center

VideoMessaging/MailConferencing Surveillance

CollaborationInstant Messaging

eMeetingsWeb Conferencing

Business AppsCRM, Supply Chain, Call

Center

IntegrationWEB-Portal, Desktop, Devices and

Server-Business Process

Presence

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Lingidhttp://www.3gpp.org/GERAN

http://en.wikipedia.org/wiki/GERAN

http://en.wikipedia.org/wiki/Unlicensed_Mobile_Access

http://www.dectweb.com/News&Views/Features/9906Dectweb.htm

http://www.riigiteataja.ee/ert/act.jsp?id=13060116