Data over coax is presented as the best last mile access technology before full fiber to the home (FttH). On-demand TV services are driving exponential growth in network traffic that will double every 18 months. Distributed cable modem termination system (CMTS) architectures using data over coax can provide high bandwidth to typical fiber to the last amplifier (FttLA) or fiber to the building (FttB) segment sizes of 100 subscribers in a future-proof way. Data over coax is a promising solution when sustained high speeds are needed, such as for IPTV traffic, businesses, or WiFi hotspots. Deploying distributed CMTS in network "hot spots" is seen as an attractive migration path

1. Data over Coax
The Best Last Mile Access Technology before FttH
ANGA COM 2013
4-6.6.2013
Hanno Narjus
Senior Vice President, Video and Broadband Solutions
ON EVERY STREET CORNER IN EUROPE

2. Or in Other Words:
Should your Next Generation CMTS be Installed Here?
ON EVERY STREET CORNER IN EUROPE

3. Evolution to All-IP
On-demand TV drives Moore’s law in access network
Challenges in coping with traffic growth
over next 3-5 years:
• Traffic doubles every 18 months
• All VoD subscribers will become broadband subs =>
stepwise increase in broadband capacity
• Network dimensioning to be done for the unicast TV
busy hour
• Sustained speeds up to 30 Mbps / HH
• # of QAM ports will grow 4-6 fold
• How to monetize the associated CAPEX?
• Physical size: there is no room in central office sites
• Power consumption to match the competition

4. HFC access network solutions
Centralized CMTS + segmentation
Main Headend
ACX ACX
BK
ACX
BK
Coax Network
Coax
House Network
IP Backbone
Streaming Video / VOD
Network management
Deep Fibre / FTTB
FTTH
Classical HFC
VoIP Gateway
Internet services
Local video Services
Telephony services
CXE
O
E
CXE
RT1000
O
E
CMTS EQAM
Headend
1550 nm / EDFA /
RF over Glass
Coax
House Network
Optical
House Network
1310 nm O-band /
CWDM / digital
return
CMTS EQAM
Headend
CMTS EQAM
Headend
1310 nm CWDM / 1550 nm
/ EDFA / DWDM

5. Main Headend
IP Backbone
Streaming video / VOD
Network management
Deep Fibre / FTTB
FTTH
VoIP Gateway
Internet services
Local video Services
Telephony services
IP Edge EQAM
PoP
Coax
House Network
Optical
House Network
P2p GigE / xPON
RF overlay
IP Edge EQAM
HFC access network solutions
Distributed CMTS architecture
P2p GigE / xPON
RF overlay
Data Access Hub
DOCSIS/EPoC/MoCA/G.hn
EQAM
Coax
House Network
PoP

6. CMTS
Docsis 3.0
DVB VoD
1000 HP /
segment
CCAP
Docsis 3.0
DVB VoD
250-500 HP /
segment
CCAP
Docsis 3.1
All-IP VoD
100-250 HP / segment
Spectrum upgrade (CPE,
Amps, passives)
Distributed architecture
More capacity (3.0 32 DS / 8 US
or EPOC / GPOC)
All-IP
50-100 HP / segment
Distributed architecture
Docsis 3.0
DVB VoD
100-200 HP / segment
FTTH
Distributed
architecture
Docsis 3.1 / EPOC
/ GPOC
All-IP
100 HP / segment

7. CMTS
Docsis 3.0
DVB VoD
1000 HP /
segment
CCAP
Docsis 3.0
DVB VoD
250-500 HP /
segment
Distributed architecture
More capacity (3.0 32 DS / 8 US
or EPOC / GPOC)
All-IP
50-100 HP / segment
Distributed architecture
Docsis 3.0
DVB VoD
100-200 HP / segment
An example scenario
1. CCAP to be launched for lower CAPEX + red-cell
fighting node segmentation
2. Distributed architecture for ”hot spots” in the network
• Uniform Docsis 3.0 platform (postpone 3.1 launch)
• Avoidance of spectrum upgrade major CAPEX
• Further segmentation
• Future proof optical transmission in acces
3. Launch more capacity
• Either stay at Docsis 3.0 + segmentation or
• Future technology e.g. EPOC
FTTH

8. Distributed CMTS architecture pros / cons
Benefits
• Plenty of capacity / subscriber
• Future proof metro Ethernet optical
access
• Simplified and lower CAPEX optical
access network
• Simplified DoC Access Hub
(compared to centralized CMTS / CCAP)
=> competitive CAPEX / QAM port
Drawbacks
• Less dynamic capacity allocation
across subscribers => capacity reserve
upfront investment for 3+ years
• More complexity distributed in the
network => Network Management tools
are a must to reach low OPEX
• Technology upgrade requires truck-roll
(e.g. Docsis 3.1)

9. Star and
Cascade
MoCA 2.0
DOCSIS
CATV
FM
2013
MoCA
400 /800 Mbps
Shared
Star and
Cascade
G.hn
(DOCSIS )
CATV
(FM )
2012
ITU -T
600Mbps
Shared
Network
topologies
Technology
Service co -
existance
Availability
Standardisation
organisation
Coax
Throughput
Amplifiers on
signal path
Star and
Cascade
IEEE P 1901
CATV
FM
Yes
IEEE
500Mbps
Shared
GoodGoodIngress
Robustness Good
Star and
Cascade
DOCSIS EoC
DOCSIS
CATV
FM
2012
Cablelabs
160Mbps US /
960Mbps DS
Shared
Active return
path amps , no
bypass needed
Fair
Star only
Baseband
Ethernet
CATV
2011
-
100Mbps
dedicated
Cannot exist
Excellent
Star and
Cascade
EPON over
Coax
DOCSIS
CATV
FM
Unknown
IEEE 802 .3
Ethernet
Working Group
Same as
DOCSIS
Active return
path amps , no
bypass needed
Poor
Star and
Cascade
HPNA 3.1
CATV
FM
Yes
ITU-T
discontinued
200 Mbps
Shared
Average
Bypass needed Bypass needed Bypass needed Bypass needed
(DOCSIS)
CATV
(FM)
Data over Coax technologies
Brief comparison

10. Data over Coax technologies
Conclusions
• Docsis DoC is the natural choice today in developed cable markets
• Mature standard, developed for access networks
• Wide availability and installed base of low-cost subscriber modems
• Works in existing two-way coax networks, up to 1 GHz
• Enables a smooth evolution from central-office CMTS to distributed DoC Access Hub
architecture
• MoCA and G.hn: for telecom operators targeting to operate > 1GHz
• Very robust modulation schemes – can work in poor quality coax plant
• Option to use frequencies above 1 GHz – with obvious unknowns
• Main focus on home-networking => standards do not cover needed functions (Ethernet
networking, security, provisioning, mgmt, ...) for access networks
• Do not work in coax networks with amplifiers
• EPoC is an option for the future (2014-2015?)

11. Data over Coax
Characteristics of attractive deployment scenarios
1. In conjunction with deep fibre upgrade (segment size c. 100 subs)
2. When sustained high-speed connectivity is needed
• High volume of unicast IP TV traffic
• Business subscribers
• Hospitality markets
3. Deployment of distributed CMTS in ”hot spots”
• Gradual evolution to distributed CMTS architecture
4. Small network Docsis solution
• CAPEX scales down to small number of potential subscribers
• E.g. in Central / Eastern Europe
5. Telco’s targeting housing associations
• Competitive alternative to VDSL

12. Data over Coax
Summary
• On-demand TV services will generate exponential growth in traffic
• Data over Coax is a promising next generation architecture
• High capacity for the typical FttLA / FttB segment sizes
• Future proof investment in Ethernet optics
• When sustained high-speed connectivity is demanded
• Interesting migration scenarios can be identified for deployments starting today
• Cable ops: evolution starting from hot-spot segments
• Telco’s: housing associations market
• Hospitality, B2B customers, backhaul for WiFi hotspots
• Further studies needed on e.g.:
• E2e CAPEX comparisons
• Provisioning and maintenance business processes

13. Thank You!
Q & A
ON EVERY STREET CORNER IN EUROPE