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Data over Coax - The Best Last Mile Access Technology before FTTH
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Transcript of Data over Coax - The Best Last Mile Access Technology before FTTH
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
Or in Other Words:
Should your Next Generation CMTS be Installed Here?
ON EVERY STREET CORNER IN EUROPE
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
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
OE
CXE RT1000
OE
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
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
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
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
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)
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
600 Mbps 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
500 Mbps Shared
Good Good Ingress Robustness Good
Star and Cascade
DOCSIS EoC
DOCSIS CATV
FM
2012
Cablelabs
160 Mbps US / 960 Mbps DS
Shared
Active return path amps , no bypass needed
Fair
Star only
Baseband Ethernet
CATV
2011
-
100 Mbps 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
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?)
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
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
Thank You!
Q & A
ON EVERY STREET CORNER IN EUROPE