FTTH 의도입전략. Back Ground. 송길호 KT 통신망연구소 CRL 제5회추모워크샵. TPS (triple play service) - Ready IP Technology

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1 FTTH 의도입전략 송길호 KT 통신망연구소 Back Ground

2 Triple Play Service? Bandwidth Requirements Current Bandwidth Range Desktop Video Medical/Virtual Reality Video Conferencing Audio Collaborative Desktop Apps Seeing Hearing Sharing File Transfer Reading 1 M 10 M 100 M

3 Residential Services & Cash Flows Telephone Line Long Distance ed Access $22 x 1.2 lines/home $19 x 42 % $ 9 average/sub $26.40 $ 7.98 $ 9 CLASS Services $ 7 average/sub Basic Cable $34 x 68 % Digital Cable $13 x 23 % Premium Channels $12 x 25 % Video on Demand $ 6 average/sub Pay per view $ 9 x 40 % Internet Access $40 x 35 % Average Revenue per User (ARPU)/Month $ 7 $23.12 $ 2.99 $ 3.00 $ 6 $ 3.6 $14 $ Video Delivery Options RF Video (CATV) over Hybrid Fiber Coax (HFC) Digital Broadcast Satellite (DBS) Digital Cable over HFC IP Video over Digital Subscriber Line (DSL) RF/Digital Video overlay over Optical Access Networks IP Video over Ethernet Passive Optical Access Networks

4 IP Video Issues Requires Set top per TV High /routing capacity of at the core QoS and traffic management issues Bandwidth requirements to support HDTV. Content piracy issues with IP video being addressed Services enabled by IP Video

5 Advanced home user Bandwidth Demands Services Three HDTV Channels Telecommuting/VPN Video Conference (Phone) Two web Surfing Interactive Gaming Two Phone services Other New services Total bandwidth Bandwidth [Mb/s] ? > 현재의가입자망 댁내구내 Access 망 ADSL 동 ADSL (Option) H-PNA Home RF Bluetooth H-PNA 전용선 (DSL, 소형광단국 ) SDSL/H-PNA B-WLL B&A A/V/SDSL LAN FTTC(ATM, Ethernet) 광 ADSL, Ntopia

6 Copper Solutions ADSL Up to 8 Mbps downstream Maximum speed depends on the distance VDSL Up to 52 Mbps downstream Up to 26 Mbps for symmetric transmission Up to 13 Mbps symmetric, practical Maximum speed depends on the distance Fiber is the Solution Conventional copper solution 100 kb/s ~ Mb/s depends on distance Cannot provide future broadband services Fiber solution Almost unlimited bandwidth Extremely high reliability with passive network Electromagnetic interference free Potentially low cost

7 FTTH Architectures Home Run Active Star FTTH Architectures Passive Star (Passive Optical Network - PON) Wavelength Division Multiplexed Passive Optical Networks (WDM - PON)

8 CO Fiber Access Network Architectures (Home Run) N (or 2N) fibers 2N Transceivers Too many fiber cores required Too many transceivers Need double star (P-t-MP) architecture ONU #1 ONU #2 ONU #4 ONU #5 ONU #N Fiber Access Network Architectures (P-t-MP; active) 1 (or 2) fibers Active remote node 2N + 2 transceivers Housing Electrical power supply High management cost Low Reliablility CO Active remote ONU #1 ONU #2 ONU #4 ONU #5 ONU #N

9 Fiber Access Network Architectures (P-t-MP; passive) 1 (or 2) fibers Passive remote node No power in field Reliable passive network TDMA or WDMA ONU #1 ONU #2 ONU #4 CO Passive remote node ONU #5 ONU #N High management and operation cost Power, housing(spa ce), Low reliability Passive networks No active elements in field Low management and operation cost No power, no housin g, High reliability Access method Shared media for TDMA protocol dependency, time sched uling Dedicated access for WDMA protocol transparency Active vs. Passive Solutions Active networks Active elements in field

10 CO Multiple Access Architectures Time Domain Multiple Access Low security Limited Bandwidth Low link budget Protocol dependency Low cost (Passive TDMA) time 1 ONU #1 2 3 ONU #2 ONU #4 Passive optical power splitter 4 ONU #5 ONU #N Open Access over ITU G.983.3

11 CO Multiple Access Architectures Wavelength division multiple access High security Unlimited Bandwidth High link budget Protocol transparency Medium cost (Low cost source is required) (Passive WDMA) ONU #1 ONU #2 ONU #4 λ ONU #5 ONU #N Comparison of PONs Access method Transparency (independency) Legacy support Graceful upgrade Security and privacy Cost Protocol Bit rate Collision λ TDMA No No No Yes No No Low Low WDMA Yes Yes Yes No Yes Yes High Medium (Source cost) WDMA PON (WDM-PON) is is the ultimate solution provided a low source cost.

12 FTTH 서비스 World Deployments of FTTH USA Japan Sweden Italy Incumbent Activity Very Low High Modest Low Transmission ATM / Ethernet Ethernet Ethernet Ethernet Services POTS, VoIP 10/100 Mb/s DATA Analog Video Digital Video 10/100 Mbps DATA POTS, VoIP 10/100 Mb/s DATA Analog Video Digital Video POTS, VoIP 10/100 Mb/s DATA Analog Video Digital Video Government Activity Very Low Low Modest Low

13 서비스 : 인터넷, VOD, VoIP, 회사와가정의가상사설망 Palo Alto Ethernet FTTH Project 대상 : 미국캘리포니아주의 Palo Alto 와 Mountain View 지역특성 : Standford Univ. 인근으로 Silicon Valley 와같이높은 Engineer 비율 진행상황 : 백본망구축 (1997 ~), 가입자망 ( ~) 망구조 : Central office --- Remote node : Bus using SMF Remote node --- Home : Star using MMF 전송속도 : 1Gbps + 10M or 100Mbps Ethernet 가입자수 : 10만 (1000가입자/1Giga ) 추정월이용요금 : ($70 for 10Mbps, $180 for 100Mbps) Palo Alto FTTH Trial Topology

14 CA*net3 Project 캐나다에서초고속인터넷서비스제공을위한 Project Backbone 을위한 Optical Internet 과가입자망을위한 GITx GITS(Gigabit Internet to the School) 1999년현재 6 개의지역의학교를 Ethernet(1Gbps + 10/100 Mbps) 으로연결하였고전국으로확대중 GITH(Gigabit Internet to the Home) 2000년부터학교뿐아니라도서관, 일반가정까지도 Ethernet을이용하여초고속인터넷서비스를제공키로확대 전송속도 : 1 or 10 Gbps Mbps 구축비용 : HFC > GITH > xdsl or Cable Modem 로추정 전송매체 : Optical fiber, UTP5 Application : DVD or HDTV video(~40 Mbps), Mega- , Home cache etc. 일본유즈커뮤니케이션 유즈는일본브로드네트워크의자회사 사업개시시기 : : 시범서비스 특징 : Ethernet FTTH/FTTO 사업지역 : : 토쿄시부야, 세타카야, 스키나미, 메구로, 오타구 : 토쿄 23구, 정부지정도시 2002 : 인구 30만이상도시, 현청소재지 2003 : 기타도시 제공서비스 일반가정및기업에인터넷접속 : 100 Mbps 전용컨텐츠제공

15 일본유즈커뮤니케이션망구조 Internet Backbone NOC 1G~10G WDM Hub site 1G Node site 100M #1 #1 #1 Contents server #15 #15~25 #200 Media converter WDM-PON Solution

16 F-P Laser Transmitter Options Lowest cost, but not adequate performance Wavelength specified source DFB laser High performance, expensive/high maintenance cost Tunable laser High cost, technology not mature Wavelength selection free solutions Wavelength locked F-P LD (KAIST, 1999) Spectrum sliced ASE (Lucent, 1995) Reflective SOA (Corning, 2001) Wavelength locked FP Laser Circulator BLS tap AWG tap FP LD SMF 20 km RX

17 Intensity Noise Suppression BW : 0.29 nm Broadband source(bb) Broadband source(40km) F-P LD (BB) F-P LD (40km) 622 Mb/s Received power (dbm) Possibility of Gigabit Transmission Transmission distance L < 1000 * (4 B D σ λ ) -1 [km] B : signal bit rate [Gb/s], D: Dispersion [ps/nm/km] σ λ : spectral width [nm] L < 40 [km] for wavelength locked FP LD B = 1.25 Gb/s, D = 17 ps/nm/km, σ λ = 0.35 nm Noise performance Bit Error Rate Estimation for spectrum sliced light source = 3 * 10-8 Experimental results with wavelength locked FP LD = Almost 3.5 db increase of Q

18 Configuration of NovaPON TM OLT F E S TRx 32 W D M RN (Optical Wavelength Multiplexer) λ 32 ONU Metro Core Core Router Based on Wavelength locked FP lasers One wavelength per each subscriber High security and privacy Unlimited Bandwidth Protocol transparency Legacy support Features of NovaPON TM High capacity WDM-PON High reliability due to no active elements in field Protocol transparency High security and privacy Transmission-speed/length : Gigabit-Ethernet/20 km of SMF Maximum number of ONUs : 32 Wavelength locked FP LDs Low equipment cost; FP LDs instead of expensive DFB LDs Low operation cost; free from wavelength restriction Low inventory costs; Non-wavelength specified lasers High compatibility Graceful (or modular) upgrade Supporting legacy systems without protocol conversion

19 Fiber Access Network Models FTTC(active) CO Gigabit Ethernet switch 아파트통신실 10 Gb/s 1 Gb/s Statistical gain : 10 Bit rate :100 Mb/s per home Density : 100 homes/building Total building : 10 Ntopia-E Model CA*net3 의 UTP5 Model Fiber Access Network Models FTTH(active) CO Gigabit Ethernet switch 아파트통신실 10 Gb/s 1 Gb/s Statistical gain : 10 Bit rate :100 Mb/s per home Density : 100 homes/building Total building : 10 Palo-Alto, CA*net3, U s 등의 fiber Model

20 Fiber Access Network Models FTTC(passive) CO 아파트통신실 1 Gb/s, 10-channel Statistical gain : 10 Bit rate :100 Mb/s per home Density : 100 homes/building Total building : 10 Fiber Access Network Models FTTH(WDM-PON) CO 3 3 아파트통신실 100 Mb/s, 32 channel Bit rate :100 Mb/s per home Density : 100 homes/building Total building : 10 True FTTH (non-shared) Model

21 Comparison of Models Architecture FTTC(Active) FTTH(Active) FTTC(Passive) FTTH(WDM) 아파트 MDF Active (1G/10G) Active (1G/10G) WDM-PON FDP 동단자함 Active (100 base T) Active (100 base Fx) Active (100 base T) WDM-PON Bandwidth Shared Shared Shared Dedicated Upgrade system system 동장비 가입자별 Transparency no no no yes FTTH (WDM-PON) is the ultimate solution FTTH (WDM-PON) is the ultimate solution Conclusions

22 Deployment Plan Phase I ( ~ ) Development of 32-channel research prototype Initial field test Set specification and standard Phase II ( ~ ) System demonstration and field trial Finalize specification and standard Phase III ( ~ ) Start global business Start deployment Impacts of WDM-PON True Proprietary and Disruptive Technology Reduce equipment cost and increase revenue Maintain leadership in broadband access World first deployment of a cost effective WDM-PON Initiate and lead international standards Accelerate broadband service development Global business in FTTx with WDM-PON