Sideseadmed (IRT0040)

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Sideseadmed (IRT0040)

• AvoLOENG
• 13. apr 2009

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Multi-Dimensional - Wireless
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Generic access 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

Access Network
Core network
Switching node
Residential
Access node
Flexibility point
Remote electronics
Fibre, copper, radio etc
Business
Feeder
Local exchange
Core network
Last drop
Customer
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Access network topology
4800/.32
1000/.4
2400/.4
Exchange
1000/.4
500/.4
2400/.4
1000/.4
200/.4
20/.5
100/.5
10/.5
10/.5
Customer connections
PCP - primary cross-connection point DP -
distribution point
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Attenuation
Attenuation is a function of frequency due to the
skin-effect
0.32 mm Cu
Attenuation (dB/km)
0.9 mm Cu
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1000
10
100
Frequency (kHz)
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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)

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
ONU
Optical Network Unit
SPLITTER
OLT
ONU
Customer Premises
Local Exchange
PCP Cabinet
ONU
Optical Line Termination
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UMA Backhaul Approach
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(No Transcript)
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GSMOB
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Interference
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LAN / WAN
Voice Network
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Voice Telephony Voice Mail Unified
Messaging Conferencing Find-Me-Follow-Me Call
Center
Presence
Video Messaging/Mail Conferencing Surveillance
Integration WEB-Portal, Desktop, Devices and
Server-Business Process
Collaboration Instant Messaging eMeetings Web
Conferencing
Business Apps CRM, Supply Chain, Call Center
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Lingid

• http//www.3gpp.org/GERAN
• http//en.wikipedia.org/wiki/GERAN
• http//en.wikipedia.org/wiki/Unlicensed_Mobile_Acc
  ess
• http//www.dectweb.com/NewsViews/Features/9906Dec
  tweb.htm
• http//www.riigiteataja.ee/ert/act.jsp?id13060116