1 Kommunikatsiooniteenuste arendus IRT0080 Loeng 7/2009 Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst.

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Presentation transcript:

1 Kommunikatsiooniteenuste arendus IRT0080 Loeng 7/2009 Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst.

2 Multi-Dimensional - Wireless Technologies Applications 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 /15/16 ……………... Business CDG WATM WG 3GPP/3GPP 2 MWIF WCA PCIA WAP

3 Generic access network Core network Switching node Residential Business Access node Remote electronics Flexibility point 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

4 Access network topology PCP - primary cross-connection point DP - distribution point Customer connections 4800/ / /.4 PCP 1000/ / /.4 500/.4 200/.4 20/.5100/.510/.5 10/.5 Exchange Manhole or footway box Distribution Point E-side cable (pairs/mm) D-side cable (pairs/mm)

5 Attenuation Attenuation (dB/km) Frequency (kHz) mm Cu 0.32 mm Cu Attenuation is a function of frequency due to the “skin-effect”

6 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)ReachSuitability kmFTTCab kmFTTC/FTTB mFTTB

7 Passive Optical Networks OLTOLT SPLITTERSPLITTER ONUONU ONUONU ONUONU Local Exchange PCP Cabinet Customer Premises Optical Line Termination Optical Network Unit

8 UMA Backhaul Approach

9

10 GSMOB

11 Interference

12 LAN / WAN Voice Network

13 Voice Telephony & Voice Mail Unified Messaging Conferencing Find-Me-Follow-Me Call Center Video Messaging/Mail Conferencing Surveillance Collaboration Instant Messaging eMeetings Web Conferencing Business Apps CRM, Supply Chain, Call Center Integration WEB-Portal, Desktop, Devices and Server-Business Process Presence

14 Lingid le_Access res/9906Dectweb.htm