1. Fixed networks
Luc Martens

2. Introduction
 Competence on all aspects (from physical layer to
application/service layer) of fixed telecommunication
networks:
 Public networks: backbone, PSTN, access networks
(DSL and cable)
 Private company networks
 In-home networks
 Technologies under study: IP-V4 / IP-V6 / MPLS,
Ethernet, SDH, Optical (packet, burst, circuit), DSL, Cable,
Fiber Channel, InfiniBand
2

3. Physical layer
 Physical layer aspects of cable and fiber access
networks
 Propagation, error sources and the impact on signal
quality
 Measurement methodologies to acquire physical layer
parameters
Ingress noise in
upstream (0-23 MHz)
on a cable network
over one day
3

4. Planning and dimensioning
 Network infrastructure (single layer, multilayer, multi-domain, overlay,
grid, spare capacity, …)
 Computing and storage infrastructure (grid, thin client, VoD servers,
 Techno-Economic
(CapEx, OpEx, Design of next-generation
multi-period, BELNET transmission infrastructure
uncertainty, …)
25
IRU (15 year)
20 IRU (15 year) + MET& Def.
20 Lease (5 year)
Lease (5 year) + MET& Def.
15 WL (1*1G) (5 year)
Million euro
15
10 IRU (15 year)
cost
10
IRU (15 year) +
5 MET & Defensie
5 Lease (5 year)
0 Lease (5 year) +
0 MET & Defensie
1 big ring
double
star
collector
collector
rings 3
rings 4
collector
collector
rings 1
rings 2
WL (1*10G) (5
g
ar
1
2
3
4
year)
in
st
gs
gs
gs
gs
r
g
le
rin
rin
rin
rin
bi
ub
or
or
or
or
1
do
ct
ct
ct
ct
4
le
le
le
le
ol
ol
ol
ol
C
C
C
C

5. Architectures
 Single Layer
(IP, Ethernet, Meshed Carrier Grade Ethernet
optical, …) Access node Metro aggregation-network
(DSLAM, …)
 Multilayer
(IP/Ethernet/S
DH/optical)
CPE
Access node
Residential triple play IP/ MPLS
(DSLAM, …) Metro-core network
 Partitioning
ISPx
(home/access/
aggregation/co Business site
BRAS
re) IP Routing
Video
 Overlay (IES)
(content, VPN ISP 2 WWW
routing, ...) VPN ISP 3
Optional
BNG
 Grid VDSL
Ethernet aggr.
ISPn
 Node (buffer, Business site Carrier grade ethernet switch
scheduling, …) VDSL
SVID=1
SVID=11
SVID=2
E-LSP for internet access SVID=22
E-LSP for VIDEO
E-LSP for E-LINE/E-LAN service
Business site
5

6. Protocols
 Medium Access (PON, Cable)
 Routing (anycast, multicast, …)
 Traffic engineering and resource allocation (mobility
support, physical layer impact, signaling, …)
 Resilience (multi-domain, multilayer, …)
Cable Modem
Termination System OSS Interface EuroDOCSIS
Network Side Interface
(CMTS-NSI)
(OSSI) Distribution
Network
MAC
Cable
Modem
specification
Cable Modem
Termination System O/E
On HFC cable
Node networks
Generic
Headend TX
Mod Customer
Router or O/E Premises
Backbone Network Node Coax Equipment
Transport Termi- RX
Adapter nation Fiber Cable Modem
CPE Interface
Demod
(CMCI)
CMTS
RF Interface
Cable Modem
RF Interface 6

7. Services and applications (1)
 Internet
 VoIP
 Video / Interactive TV (DVB/MHP based, IPTV)
7

8. Services and applications (2)
 Time-shifted Television
 RTP/RTSP/RTCP RTSP
RTP
cache proxy CSE
internal
server C CVM RP PH C CVM RP PH client
describe <program url>
ok + SDP data
setup <stream> to clientIP:port x
0
initialize
ok
play <program url> at <time>
RTSPMessage
verdict? RTSPSession
cache from server!
stream PacketBuffer C: Cacher
and setup <stream> to proxyIP:port y
CVM: CacheVerdictManager
1a cache RP: RTSPProxy
PH: PacketHandler
ok
play <program url> at <time>
ok
ok
update RTP stream to proxyIP:port y
cache update cache state
RTP stream to clientIP:port x
2a states
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9. Services and Applications (3): iDTV test platform
 Development of MHP applications
 Multimedia Home Platform (MHP)
 Actual test environment
 MPEG-2 HW encoder
 Hardware multiplexer
 Modulator
 ADB Dev Boxes
(Osmosys middleware)
 Emulated test environments
 Osmosys SDK
 IRT Reference Implementation
9

10. Services and Applications (4): iDTV test platform
 Explore the possibilities of the platform
 Social interactions and communication
 Content creation
 Personalization
 ...
 Example applications
 iDTV photo-album
 Messaging
 Videoconferencing
 eID integration
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11. Services and Applications (5): iDTV applications
 Instant Messaging (IM)
 I am watching …
 Program
recommendations
 Social networking
 Personalization
based on your social
network
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12. Services and Applications (6): iDTV applications
 Belgian Electronic Identity Card
 Use Cases
 T-commerce
 Secured IM
 T-Banking
 T-Government
 How?
 Latest MHP versions
 Security and Trust Service API (SATSA)
 Older MHP versions
 Open Card Framework (OCF)
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13. Services and Applications (7): Personalization &
Visualization
 Problem:
 Consumer gets lost in the profusion of content
 Solutions:
 Offer personalized content
 Explore new navigation and visualization paradigms
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