Next Generation Access Networks (NGAN): Introduzione alle Tecnologie FTTdp

Transcription

1 Next Generation Access Networks (NGAN): Introduzione alle Tecnologie FTTdp Riunione GTTI 2013 Ancona, giugno 2013 LUCA MESSINA, CTO

2 Aethra Telecommunications INTRODUCTION HIGHLIGHTS Headquarters: Ancona, Italy 40-years in the Telecommunications Business (Access Network Business Unit of Aethra SpA) Part of AB Medica Group (since 2009) (300 people, 120 M Revenues FY 12) Milan Ancona LEGAL ENTITY A TLC srl COMMERCIAL BRAND Aethra Telecommunications ROME THE PEOPLE 70 people, 65% in technical areas (R&D, Engineering, Product MNGM / Validation) FACTS FY2012 REVENUES 12M EBITDA 650K PRODUCTION Through Third Parties ITALY EAST EUROPE FAR EAST 2

3 Aethra Telecommunications PRODUCT PORTFOLIO SMB / SME MARKET SEGMENT (in EU-27: >20 million companies, >2/3 of employed people in the private sector, >50% of total value-added created by businesses) Fully-Fledged Routers IADs with POTS and ISDN BRIs ifcs Any DSL Flavour, GbE/SFP for FTTH INFRASTRUCTURE SOLUTIONS Remote Power Feeding system (CO&CPE) for powering minidslam in FTTCab Architectures Hybrid Copper/Fiber NT with support of reverse powering for FTTdP Architectures SHDSL SOLUTIONS, DSLAM s BASED SHDSL.bis NTs, EFM Ethernet Demarcation Devices SHDSL NTs, legacy services (Frame Relay/TDM Leased Lines) transport over ATM MOBILE SOLUTIONS M2M Platform / Gateways (for Smart Metering and Ambient Assisted Living applications) ISDN NTs since 1995 WPS Button DECT Button A/VDSL Port USB Ports Gb LAN Ports Gb WAN Port (or mngt Port) FXO Port FXS Ports routers/iads since SHDSL ports since 2003 > 2 millions VoIP Channels delivered POWER POWER ISDN Ports FXS Ports Eth WAN Port (or mngt Port) CONSOLE Eth LAN Ports Compact Flash Slot for Additional WAN Ifc 3

4 Market considerations FIXED BROADBAND PENETRATION IN EU (POPULATION) Source: EU Commission 4

5 Market considerations FIXED ULTRABROADBAND RELATIVE WEIGHT IN EU ULTRABROADBAND = VDSL, Fibre to the Home, Fibre to the Building + Ethernet/LAN, Cable Modem Source: EU Commission 5

6 Market considerations FIXED BB LINES BY TECHNOLOGY IN EU Source: EU Commission 6

7 How Long Will We Live? IN FEW WORDS, IN EU: ADSL SLOWING DOWN, VDSL2 RAMPING UP FTTx GROWING, FTTH NOT EXPLODING 7

8 Questions Figures from Wikipedia IS FTTCab FUTURE PROOF? 100 MBPS SYMMETRIC AVAILABLE, BUT WITH A LARGE VARIANCE ON ATTAINABLE BIT RATES IN THE REAL-WORLD (EG. DISTANCES, CROSS-TALK, CABLE CONDITIONS) IS FTTB PLUG-AND-PLAY? POWERING OF MDUs / MTUs MEANS DEALING WITH TENANTS AND ELECTRIC UTILITIES IS FTTH 100% APPLICABLE? UNCERTAIN LEAD TIMES DUE TO VERTICAL / HORIZONTAL CABLING IN BUILDINGS COSTS in WHITE AREAS TOO HIGH IS THERE ANYTHING ELSE? DIFFERENT? BETTER? VIABLE? 8

9 Telecom Italia Network Statistics FTTdP Concept FTTdP

10 FTTdP Concept Fibre arrives up to the building s basement / floor or street pole / cabinet / shaft then Copper is used A single-port Hybrid Fiber/Copper Network Termination (eg. a GPON ONT + femtodslam VDSL2) is installed in the basement / floor / pole / cabinet / shaft A Power Injector is installed at Customer s premises, Each User Powers its own Network Termination Is FULLY INDEPENDENT Copper link on a such short (very few tens of meters) distances can support fiber-like bit rates Laptop, Tablet Smartphone Reverse Power Feeder ETH / WIFI VDSL2 G.FAST PC IPTV Modem / router / IAD Analog phone UP TO 250 Mbps AGGREGATED DATARATES with VDSL2 30a PROFILE EXCEEDING 500 Mbps AGGREGATED DATARATES with G.FAST ULTRA BROADBAND on FIBRE COPPER PAIR< ULTRA BROADBAND REVERSE POWER FEEDING Basement / Floor / Pole / Cabinet Hybrid Network Termination 11

11 FTTdP Concept FTTdP ADVANTAGES vs FTTH Installations timing and consequently costs are predictable If POTS is to be preserved, a single physical mean and cabling (ie the existing copper loop) is used at Customer s premises instead of two (fiber + copper) Easy up selling to existing VDSL2 Customers Laptop, Tablet Smartphone PC FTTdP ADVANTAGES vs FTTB The active elements are powered by the Customers themselves Single user approach guarantees scalability and control on investments Reverse Power Feeder ETH / WIFI VDSL2 G.FAST IPTV Modem / router / IAD Analog phone FTTdP ADVANTAGES vs FTTCab Range of copper pair lengths is much less spread, bit rates much more constant and predictable among Customers Fiber like bandwidth (VDSL2@30a or G.FAST) ULTRA BROADBAND on FIBRE COPPER PAIR< ULTRA BROADBAND REVERSE POWER FEEDING Basement / Floor / Pole / Cabinet Hybrid Network Termination

12 FTTdP Flavours FLOOR LEVEL (INSIDE A BUILDING) BUILDING BASEMENT POLE (AERIAL CABLES) WHERE is a Distribution Point (DP) LOCATED? STREET CABINET SHAFT

13 FTTdP Issues REVERSE POWERING Reverse Powering Brings a guaranteed benefit to the Telecom Operators in terms of their energy bills Is not cheating Customers: as a matter of fact, it s not a different situation from Customer s powering ISDN NTs, ONTs, xdsl modems/routers/iads or even IP-TV STBs Power requirements of hybrid NT are to be kept as low as possible, of course The most (only) viable solution is very much the same used by PSTN in the last 100 years (or more): applying a DC voltage to the loop DC Reverse Powering will conflict with POTS signaling (eg. DC powering and ringing voltages from CO, on-hook, off-hook conditions) While there are several ways to keep POTS and Reverse Powering together the general agreed assumption is that FTTdP will be associated to the availability of a VoIP-only voice service to Customers 13

14 FTTdP Issues REVERSE POWERING Safety of Information technology equipment (general): EN/IEC PSTN terminals/interfaces: ETSI TBR 021, ETSI ES , ETSI Reverse Power Feeding: EN/IEC , ETSI ES , ETSI TR , ETSI TR Elements to be considered (from alle the above documents) PSTN Terminals must be tested up to 100Vdc Up to 60Vdc are not generally regarded as hazardous under dry conditions for an area of contact equivalent to a human hand Typical DC voltages in PSTN (sourced from batteries located in the CO): nominal voltage of -48V (and -60V) and a range of -40,5 Vdc to -57 Vdc Maximum power available from a Telecommunication network should be limited to 15VA POTS copper wiring is generally considered a TNV-1 circuit (ie. max 60 Vdc, exposed to overvoltages of Telecommunications networks) 200m/0,4 mm Launch voltage 60V End-line voltage 50V Figure from ETSI TR

15 FTTdP Issues COPPER COUPLING TWO TECHNOLOGIES SUITABLE TO FTTdP, VDSL2 and G.FAST VDSL2 standardized in 2006 VDSL2 chipsets shipped in volumes VDSL2 Profile 30a offers aggregated data rates of 250Mbps with a 100Mbps symmetric service resembling most of nowadays FTTH services DP VDSL2@30a vs Cabinet VDSL2@17a (need for DPBO) VDSL2 modems, supporting 17a&30a, already deployed in FTTCab allow easy upselling once FTTdP is in place G.FAST standardization in QI- 14 G.FAST chipsets expected in Late 14 G.FAST targets aggregated data rates exceeding 500MBps, overtaking most of nowadays FTTH services, filling the gap between copper and fiber G.FAST can start above 17 MHz VDSL2 modems in current FTTCab architecture must be substituted in case of FTTdP-G.FAST Relative computational complexity of the different DSL flavors Timmers et alt., Proceedings from ACCESS 2011 Relative memory complexity of the different DSL flavors 15

16 FTTdP Issues COPPER COUPLING TODAY: VDSL2 FIBRE-TO-THE-DISTRIBUTION-POINT SAMPLE BITRATES AND DISTANCES IN DIFFERENT APPLICATION SCENARIOS Aethra Telecommunications BG7420 CPE VDSL2 profile: 30a Bandplan: 998E30 Copper cable gauge: 0.6 mm (AWG 23) REAL MEASUREMENTS SUPERFAST BROADBAND SERVICES AVAILABLE TODAY SAME AS FIBRE OFFER 250Mbps AGGREGATED 700m MAXIMUM DISTANCE DP: POLE / CABINET 350m RURAL AREAS DP: POLE 180m NON-DENSE AREAS DP: CABINET / SHAFT / BASEMENT 120m NON-DENSE AREAS DP: CABINET / SHAFT / BASEMENT 40m DENSE URBAN AREAS DP: FLOOR / BASEMENT BANDWIDTH BANDWIDTH BANDWIDTH BANDWIDTH BANDWIDTH DOWNSTREAM UPSTREAM DOWNSTREAM UPSTREAM DOWNSTREAM UPSTREAM DOWNSTREAM UPSTREAM DOWNSTREAM UPSTREAM 52.3Mbps 20.79Mbps 119.1Mbps 56.33Mbps 140Mbps 87.17Mbps 140Mbps 103.1Mbps 140Mbps 107.2Mbps OFFER 50 / 20 OFFER 100 / 50 COMPATIBLE WITH COMMERCIAL OFFER 150 / m 600m 500m 400m 300m 200m 100m DISTRIBUTION POINT HOME 16

17 Service rate performance targets 500/1000 Mb/s at <100m 500 Mb/s at 100m 200 Mb/s at 200m 150 Mb/s at 250m FTTdP Issues COPPER COUPLING TOMORROW: G.FAST Downstream/upstream asymmetry ratio Mandatory: 90/10 to 50/50 Optional: from 50/50 to 10/90 Coexistence with xdsl Start frequency: 2.2, 8.5, , and 30 MHz AGGREGATED THROGHPUT UPSTREAM + DOWNSTREAM Bandwidth Profiles: 100 MHz, 200 MHz (future) Modulation: DMT, 2048 sub-carriers (100 MHz Profile), subcarrier spacing khz, 12 bits/sub-carrier Mandatory support for vectoring Far-end crosstalk (FEXT) cancellation Loops up to approximately 250 m of 24 AWG (0.5 mm) wire pair VDSL2 is approximately 2500 metres of 26 AWG (0.4 mm) Support for both TR-156 and TR-167 Broadband Forum architectures 17

18 FTTdP Issues INSTALLATION IN THE HOME NETWORK A SUCCESSFUL SOLUTION for both the customers and the carrier needs installation timing to be: SHORT PREDICTABLE THREE installation steps can be foreseen Hybrid NT at DP: technician always needed Connection between DP and Customer s home wiring over existing copper pair: NO ACTIVITY IN FTTdP Power Injector in Customer s home wiring: self-install The best option is to handle the whole installation without the need of scheduling an engineer appointment at the customer s home; this will avoid: Hassle for the customer (4 hours appointment, need to get time away from work ) Cost for the carrier FTTdP (without POTS regeneration) allows an un-managed install First the Technician installs the hybrid NT at a DP Then the Customer plugs in the Power Injector The two activities do not need to be synchronous, just cascaded 18

19 FTTdP Issues INSTALLATION IN THE HOME NETWORK UN-MANAGED INSTALL SCENARIO: VDSL2/G.FAST, NO POTS Installation can be easily deployed without the need for an engineer appointment Voice services are provided through VoIP and so using FXS ports on the VDSL2/G.FAST CPE / IAD ANY PHONE, FAX OR DEVICE MUST BE CONNECTED TO ONE OF THE PORTS OF THE VDSL2/G.FAST IAD ANY OTHER SOCKET INSIDE THE HOME NETWORK (IF PRESENT) IS NOT WORKING AND USELESS ANYWAY BUILDING HOME EXTRA SOCKET (DO NOT USE!!!) Analog phone NETWORK LOOP EXTRA SOCKET (DO NOT USE!!!) USED SOCKET Standard VDSL2 modem / router / IAD or new G.FAST modem / router / IAD VDSL2/.G.FAST Analog phone VDSL2/G.FAST Aethra Telecommunications HNT1 Hybrid Network Termination VDSL2/G.FAST EXTRA SOCKET (DO NOT USE!!!) EXTRA SOCKET Aethra Telecommunications RPF1 Reverse Power Feeder FXS PORTS Analog phone (DO NOT USE!!!) EXTRA SOCKET (DO NOT USE!!!) 19

20 FTTdP for real AETHRA TELECOMMUNICATIONS HNT1 HYBRID NETWORK TERMINATION AETHRA TELECOMMUNICATIONS HNT1 HYBRID NETWORK TERMINATION FTTdP solution has been co-developed with Lantiq and is based on Lantiq chipsets VINAX-D and FALC ON ULTRA LOW POWER CONSUMPTION VDSL + GPON Other Converter TOTAL 6,5 W 0,3 W 1,1 W 7,9 W COPPER CABLE TO CO GPON FIBRE BOARD DIMENSIONS: 135mm x 98mm Standard VDSL2 CPE GPON ONT CHIP DC POWER VDSL2 CO CHIP VDSL2 GALVANIC CONTINUITY TOWARDS CENTRAL OFFICE CAN BE RESTORED USING RELAYS (e.g. IF RPF1 IS DISCONNECTED) IN ORDER TO GUARANTEE EASY MIGRATION TO AND FROM OTHER SERVICES / OPERATORS TO CO w/relay Aethra Telecommunications HNT1 Hybrid Network Termination DC/DC CONV. HZ-DC EXTRACTOR LIF COPPER PAIR Aethra Telecommunications RPF1 Reverse Power Feeder 20

21 The Power of the Network GOOGLE FTTdP vs FTTCab FTTCab is presently the chosen option by Telecom Italia and Fastweb to bring ultrabroadband in Italy Results obtained on June 20th 2013, CET 21

22 Conclusions FTTH: THE NEXT BIG THING YES, BUT NEXT WHEN?? 22

23 Conclusions EGGS AND HENS (Western) Europe is STRUGGLING to reach a critical-mass of FTTH subscribers Without CHANGING approaches, DIFFERENT results will be hardly achieved FTTdP is DIFFERENT FTTdP could be more mature, of course BUT Why Choosing between having an egg (100 Mbps) today (copper) OR an hen (1Gbps) tomorrow (fiber), when you can have both? FTTdP/VDSL2 = The EGG FTTdP/G.FAST = The HEN 23

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25 Back-Up Slides

26 FTTdP Issues POTS SUPPORT ANALOGUE Voiceband signals (and any other in-band signal, eg. FSK) pass-through Signaling between DP and Customer s LLEP (eg. for Ringing, Off-Hook) is carried by dedicated off-band carriers DIGITAL Digital signal between DP and Customer s LLEP with appropriate framing carrying sampled/digitised voiceband (and any other in-band tones, eg FSK) and a specific protocol for signaling IN THEORY, BOTH WORK FINE AS LONG AS THEY ARE COMPATIBLE WITH VDSL2 / G.FAST SPECTRUM G.FAST Starts above 2.2 MHz VDSL2 Starts at 138 khz, if U0 band is not used - Starts at 25 khz, if U0 band is used U0 band support is not used in 30a Profile 26

27 FTTdP Issues POTS SUPPORT ANALOGUE could be based on identifying three carriers (based on Country-specific standards) providing signaling to/from DP and LLEP (for upstream and downstream signaling) POTS Band xdsl Band DIGITAL would imply implementation of VDSL2 over a_digital_signal like ISDN kbps line rate, kbps line rate (or 128 kbps line rate, if TC-PAM 4 is used) thus leveraging well-know technologies and widely available chipsets 4K 11K 18K22K32K SPECTRUM on the BUILDING LOOP Figure from ETSI TR DIGITAL WITH ISDN ( VDSL2 over ISDN ) Fully standardized and already deployed (eg Germany) ISDN Silicon available since decades, not exactly a technology with a bright future today NOT ALLOWED everywhere (eg. Italy neither ADSL over ISDN is permitted); change of mind by National Regulators needed DIGITAL WITH SHDSL ( SHDSL below VDSL2 ) Brand new approach SHDSL Silicon available and stable Consensus/Approval to be gained by xlecs and National Regulators Line coding currently mandated by ITU-T and ETSI for SHDSL (TC-PAM 8 for US asymmetric, TC-PAM 16/32) would allow a minimum line rate of 200kbps, which could be compatible with VDSL2 starting from 138 khz Additional implementations (eg based on TC-PAM 4/8) allow even lower minimum line rates (eg 136 kbps) IN CASE OF G.FAST, NO ISSUE IS FORESEEN DUE TO G.FAST SPECTRUM OCCUPYING FREQUENCIES ABOVE 2.2 MHz (or 8, 12, 17, 30) 27

28 FTTdP Issues COPPER COUPLING TO VECTOR OR NOT TO VECTOR: THAT S THE QUESTION Profile 30a - Downstream --Upstream ADSL dbm/hz -130 dbm/hz + 12-Self -130 dbm/hz + 6-Self Mbps ,5 1 1,5 2 2,5 3 3,5 Kft of 26-AWG NOT TO VECTOR! 28