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Data over Coax - The Best Last Mile Access Technology before FTTH
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
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Data over Coax - The Best Last Mile Access Technology before FTTH
- 1. Data over Coax TheBest 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 OtherWords: Should your Next Generation CMTS be Installed Here? ON EVERY STREET CORNER IN EUROPE
- 3. Evolution to All-IP On-demandTV 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 networksolutions 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 Streamingvideo / 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 1000HP / 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 1000HP / 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 architecturepros / 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 Coaxtechnologies 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 Characteristicsof 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