1. Telecommunications Sector
Liberalization of the
Telecommunications Sector
Building a Competitive
Service Providers
Access Network Challenges
New Bulgarian University
Department of Telecommunications
Seminar Speaker: Marin T. Tintchev
Advisor of the Speaker: Prof. Antoni Slavinski

2. Contents Access Technologies and Services
Integrated Multi-Service Access Platform
Metropolitan Area Network
Access Network Applications
Access Bottleneck Issue
Access Network Issue

3. Access Technologies
and Services

4. Access Technologies and Services
Access Technology
Symmetrical
Asymmetrical
Downstream
Services
Subscriber
Segment
IMAP
Full Service
Full Service Access Network
All
ADSL
8 Mbps
Internet
Multimedia
SOHO
Residential
SDSL
192 Kbps – 2 Mbps
Leased Lines
SME
HDSL2
2 Mbps
G.SHDSL
VDSL
6, 10 or
13 Mbps
52/56 Mbps
VOD

5. NGN Access Technologies and Services
Access Technology
Symmetrical
Asymmetrical
Downstream
Services
Subscriber
Segment
Cable Modem
1 to 3 Mbps
Internet
SOHO
Residential
Sub 11Ghz FWA
64 Kbps –
1 Mbps
Sub 11Ghz BWA
5 Mbps
SME
LMDS
2 –
155 Mbps
Full Service

6. NGN Access Technologies and Services
Access Technology
Symmetrical
Asymmetrical
Downstream
Services
Subscriber
Segment
Free Space Optics
2 Mbps –
2,5/10 Gbps
Full Service
Fast Ethernet
Large Business
SME
SOHO
Dwelling Block
Residential
Microwave Systems
2 – 622 Mbps
FITL
Multi-Dwelling Block

7. Integrated Multi-Service
Access Platform

8. Convergent and Integration
Convergent and Integration in Access Platform
Networks
TDM Networks - PSTN/ISDN
Packet Networks - IP/ATM/FR
Broadcasting Networks - CATV
Wireless and Mobile Networks
Services
Broadband
Narrowband
Fixed/Mobile
Technologies
Fixed
Wireless
Optical
Cable (Copper and Coaxial)

9. Access Network Platform
Access Platform
SS7/ISUP
Control Layer
switch
MGCP/H.323
switch
PSTN/ISDN MG
V5.x
CATV
IP/ATM
VoIP
VoATM
Data
Image
MGCP/H.323
DLL
xDSL
LAN
HFC
APON
IP Phone FR
POTS
ATM
V5.X
ISDN
Access Network Platform

10. Access Platform – Network Scenario
Remote
Terminal
PSTN
High-End
Unit
ATM
Subscriber Access
Copper
Fiber
Wireless
Coaxial IP
Subscriber Interfaces
POTS
ISDN E1
Special
xDSL
Ethernet
ATM
CATV

11. Access Platform – Network Scenario
High-End Unit
Located Close to PoP
Interconnection With Existing Networks – Circuit Switching, Packet, CATV Source etc.
Connected to One or More Remote Terminals
Abbreviation - OLT – Optical Line Terminal
Remote Terminals
Located in: Basement or Street-Side
Connection: Copper, Fiber, Coaxial or Wireless to the Subscribers
Abbreviation:
ONU – Optical Network Unit
ONT – Optical Network Terminator
ENT – Electrical Network Terminator
DRP – Distribution Remote Points
ISU – Integrated Service Unit
IAD – Integrated Access Device
IAU – Integrated Access Unit

12. WDM/SDH/Metro/VP RING
Access Platform – Topology Scenario
ONU
ONU
ONU
OLT
ONU
WDM/SDH/Metro/VP RING
ONU
APON/PON
Fax
ONU
ONU
WDM
SDH
Metro BS
FSU
ONU
ONU
ONU

13. Access Platform – Elements Structure
OLT – Optical Line Terminal
Network Interface Block
Administration and Control Block
Transmission Block
CATV Block
ONU – Optical Network Unit
Subscriber Interface Block
Control and Environment Monitoring Block
MDF Block
Environment Block

14. MAN – Metropolitan
Aria Network

15. Metropolitan Area Network
n* / STM-64
STM-16
STM-4
Backbone Layer:
Metropolitan Network for
large capacity grooming
DWDM/C-WDM
SDH
n* / STM-64
STM-16 / STM-4
STM-1
Tandem Layer:
Metropolitan Network for
multi-service tandem and
transmission
DWDM/C-WDM
SDH
DWDM
C-WDM
SDH
Access Layer:
Metropolitan Network for
multi-service access IP
n*
STM-64
STM-16
STM-4
STM-1
C-WDM
APON
PON
ATM
PBX

16. Access Network
Applications

17. Access Network Applications
PSTN/ISDN
ADSL V5
POTS
ATU-R
ATM
STM-1/4
TDM/ATM/IP
In One
DSLAM
Internet
VOD, VPN…
10/100Base-T
DDN/FR E1
SDH/ATM
VP Ring
APON…
HUB
CATV
Internet
VOD, VPN…
FE or
TRUNK(4XFE) IP
Server
HUB
10M
Ethernet
VOD
Video
Conference
E-Education
Video
Server
Web
Server
Video/Image

18. Access Network Applications

19. Access
Bottleneck Issue

20. Access Bottleneck Issue
Development of broadband access systems standards and technologies
Demand for bandwidth and a scalable network infrastructure.
FTTH infrastructure as an alternative to less-scalable xDSL, cable modem and fixed wireless access deployments.
Governments - From the bandwidth-limited information society of today and the bandwidth-rich information society of tomorrow.
Governments - FTTH deployments

21. Access
Network Issue

22. Access Network Issue
Development of broadband access systems standards and technologies
Service providers - Detailed plan for migrating the different subscriber segments from circuit-switched to pure packet-switched access infrastructures.
Service providers - Ethernet carriers that start to claim a stake in the telecommunications services market.

23. Access Network Issue
Development of broadband access systems standards and technologies
Fiber technologies - Edge of access networks. Home and desktop.
Incumbents - Business models segment by segment.
Internet Protocol-based and asynchronous transfer mode-based access solutions.
Competitive operators - Conservative when forecasting payback periods for new technologies and select their target customers carefully.

24. END New Bulgarian University Department of Telecommunications
Seminar Speaker: Marin T. Tintchev
Advisor of the Speaker: Prof. Antoni Slavinski