슬라이드 1

Size: px

Start display at page:

Download "슬라이드 1"

형진 봉
8 years ago
Views:

1 차세대광가입자전송기술

2 발표순서 I. 광가입자망개요 II. 기술동향 III. 국내외 R&D 현황 IV.NG-PON3 전망 V. 맺음말

3 I. 광가입자망개요 3

4 4 Broadband Statics in OECD OECD Fixed broadband subscriptions per 100 inhabitants, by technology, June Other Fibre/LAN Cable DSL OECD average Source: OECD

5 5 Broadband Statics in OECD OECD wireless broadband subscriptions per 100 inhabitants, by technology, June Dedicated mobile data subscriptions Standard mobile broadband subscriptions Terrestrial fixed wireless Satellite

6 6 Broadband Impact on GDP Source: GSR 2010 Discussion Paper from ITU

7 Giga Internet Project 7

8 8 광가입자망개요 Speed 100Gbps 10Gbps 100Mbps 10Mbps Biz. Subscriber RU ONT Optical Access Network Metro Network Core Network ONT MD Mobile Fronthaul RN FES RN FTTH 광 LAN DSLAM xdsl NG Access OLT OLT DU L3 S/W Metro Aggregation S/W TDM 5G Packet Core SGW EPC TDM PGW SER SER BRAS Coverage 20km 100km 1000km DSL: Digital Subscriber s Line, EPC: Evolved Packet Core, FTTH: Fiber-To-The-Home, FES: Fast Ethernet Switch, RN: Remote Node, ONT: Optical Network Terminal, OLT: Optical Link Termination, RU: Radio Unit, SER: Service Edge Router

9 광가입자기술로드맵 Trend 1: 액세스망의고속화, 광역화, 고품질화및융합화방향으로기술진화 Trend 2: TDM에서품질보장이가능한 WDM, TWDM에이어 SDN 기반 Adaptive PON 기술로진화 Trend 3: Legacy PON 수용하는하이브리드플랫폼, 무선액세스망수용하는융합플랫폼으로진화 물리계층기술 FDM WDM Injection Seeding NG-PON1 OFDMA-PON NG-PON2 WDM/TDM Hybrid PON Array/Tunable WDM-PON TWDM-PON NG-PON3 OFDM-TDM-PON OFDM-WDMA-PON Coherent PON TDM EPON GPON 10G EPON XG-PON 40G TDM-PON 속도 10Mbps 100Mbps 1.25Gbps (2.5Gbps) 10Gbps 40Gbps 서비스 FTTH Wired-Wireless Converged 연대 ~ FDM: Frequency Division Multiplexing, TDM: Time Division Multiplexing, WDM: Wavelength Division Multiplexing, NG-PON: Next Generation Passive Optical Network, EPON: Ethernet PON, GPON: Gigabit Capable PON, FTTH: Fiber-To-The-Home, XG-PON: 10G GPON, TWDM-PON: Time and Wavelength Division Multiplexing PON, OFDMA-PON: Optical Frequency Division Multiplexing Access PON, SDP: Software Defined Photonics 9

10 10 광가입자기술수요 Mobile fronthaul/backhaul Cloud 기지국용광연결수요발생 Data Center Dater Center 내광연결을위해저가형광트랜시버수요발생 45% of respondents plan to use RU and with it the CPRI protocol for fronthaul, that is, fiber-connecting a group of RRHs from a baseband unit (Infonetics Research, ) CO consolidation 데이터센터규모 = 90km 2 광섬유길이 = 6,400km Rack 당용량 = 100TB 매일증설되는서버수 > 1,000 Typical reach is meters but trending toward meters for big data centers. The remaining 5% are long reach lengths spanning the data center or campus network from 400 meters to 1.5 km. 100G LR4 - $11,000(10km) 100G SR10- $1,500(100m) Business service application 10G EPON 및대용량 OLT(1T 급 ) 도입으로광역화수요발생 (KT) 대용량 OLT 40km 20km 10G 고분기 (1:128 ) 10G 10G Reach Extender

11 Tactile Internet Source: 5G-What Will It Be: The Tactile Internet, ICC

12 이동통신클라우드기지국발전전망 Source: Alcatel-Lucent, FSAN meeting

13 이동통신클라우드기지국발전전망 Source: Alcatel-Lucent, FSAN meeting

14 IDC 네트워킹발전전망 Source: Alcatel-Lucent, FSAN meeting

15 IDC 네트워킹발전전망 Source: Alcatel-Lucent, FSAN meeting

16 II. 기술동향 16

5 Gb/s, 10 Gb/s Tunable ONU 2 Port 8 λ 8 PtP WDM CEx 20km Tunable ONU 3 Tunable ONU 4 Port 1 λ 1 Up: 2.

17 NG-PON2 TWDM PON: 10G x 4ch/8ch. DS, 2.5G(10G) λ-tunable US WDM overlay(ptp WDM-PON): 1-10Gbps /ch TWDM-PON Port 1 λ 1 Tunable ONU 1 Port 2 λ 2 Down: 2.5 Gb/s, 10 Gb/s Tunable ONU 2 Port 8 λ 8 PtP WDM CEx 20km Tunable ONU 3 Tunable ONU 4 Port 1 λ 1 Up: 2.5 Gb/s, 10 Gb/s Tunable ONU 5 Port 2 λ 2 Tunable ONU N Port 40 λ 40 Key Requirements 2.5G/10G aggregate, 1 Gb/s per sub., 40 km passive reach, > 64 subs. Re-use of outside plant, coexistence Challenge: λ-tunable TX/RX ONU, wavelength management, load balancing and etc. Additional requirements are still under debate 17

ITU-T standard work related Fronthaul G.metro (Multichannel bi-directional DWDM applications with port agnostic singlechannel optical interfaces) 14.3, ITU-T SG15 approved to start G.

18 ITU-T standard work related Fronthaul G.metro (Multichannel bi-directional DWDM applications with port agnostic singlechannel optical interfaces) 14.3, ITU-T SG15 approved to start G.metro as a new work item with having lowcost metro application including Fronthaul 16.6, The recommendation will be published 14 Supporting members that are committing to contributing to the work item BT (UK), Huawei (China), Xtera (USA), Ericsson (Sweden), Italy, ETRI (Korea), Coriant (Germany), DT (Germany), Transmode (Sweden), ZTE (China), ADVA (UK), Softbank (Japan), China Unicom (China), Fiberhome (China) Rx 1 Tx 1 Rx 2 Tx 2 Rx N Tx N OD /OM MPI-S M for signals going MPI-R M for signals going DWDM network elements OADM OD /OM DWDM link R S S S R S S S Rx Tx Rx Tx Head-end R S S S R S for signals going S S for signals going Important Features Automatically adapt tail-end transmitter (TLD was supported strongly by multi companies in ITU-T SG15 Q.6) OD/OMs or OADMs are included in the link Up to 10Gb/s (channel spacing frequency spacing to be discussed) Rx Tx Rx Tx 18

19 Cloud BS Evolution Trend 19

20 Cloud BS Evolution Trend 20

21 Cloud BS Evolution Trend 21

22 DU 국내이동통신프론트홀구축현황 Current Status of Mobile Fronthaul Accommodating LTE-RU 32 ea using CPRI MUX & CWDM 8 SV COT CWDM Core Ring RT1 RT SV G 10G CPRI CPRI CPRI MUX MUX MUX CPRI MUX 2.5G 2.5G 2.5G 2.5G 2.5G 2.5G 2.5G RU1 RU2 2.5G RU3 RU4 Current: 1x2.5 Gbps/RU Future: Require (~30) Gbps /RU for LTE-A Rel. 10 spec Mobile Carriers prefer ring type COT-RT architecture with cost effective CWDM Employing 16 CWDM wavelengths in a unit ring configuration Requiring additional 1 wavelength for supervisory and control channel besides CPRI data channels Current commercial LTE services need one 2.5Gbps(CPRI Option 3) channel for 1 RU In the near future, approximately 30 Gbps optical transmission capacity will be necessary for LTE-A Rel. 10 Spec. Accommodating only 1 RU/unit ring 22 22

IF 다중화방식프론트홀 RU configuration (for 20 MHz LTE signal) Minimum required traffic handling capacity Required number of IF carrier 1 FA, 3 sectors, 4x4 MIMO 1 FA, 3 sectors, 8x8 MIMO 2 FAs, 3 sectors,

23 IF 다중화방식프론트홀 RU configuration (for 20 MHz LTE signal) Minimum required traffic handling capacity Required number of IF carrier 1 FA, 3 sectors, 4x4 MIMO 1 FA, 3 sectors, 8x8 MIMO 2 FAs, 3 sectors, 8x8 MIMO Gb/s Gb/s Gb/s 20 MHz IF carrier 12 ea 20 MHz IF carrier 24 ea 20 MHz IF carrier 48 ea 1. CPRI Line Rate = 30.72Mbps x 16 bit ADC/DAC x I/Q x 1FA x 3 Sector x 4 Antenna x 8B/10B coding = 14.74Gbps 2. CPRI Line Rate = 30.72Mbps x 16 bit ADC/DAC x I/Q x 1FA x 3 Sector x 8 Antenna x 8B/10B coding = 29.49Gbps 3. CPRI Line Rate = 30.72Mbps x 16 bit ADC/DAC x I/Q x 2FA x 3 Sector x 8 Antenna x 8B/10B coding = 58.98Gbps 23

24 III. 국내외 R&D 현황 24

25 25 국내 R&D 동향 -NG-PON2 연구목표 NG-PON2(TWDM-PON) 장비 OLT/ONU NG-PON2 용저가형 ( 어레이광모듈, 파장가변 ) 광트랜시버기술 NG-PON2 용 CMOS 포토닉스기반 TOSA/ROSA 기술 10G EPON Reach Extender 기술 10 Gb/s OFDMA-PON 용실시간광모뎀기술 개념

26 국내 R&D 동향 -NG-PON2 TWDM-PON OLT 용광트랜시버 (CFP 형 ) CMOS 포토닉스기반 AWG, 광검출기단일집적화기술 Array TIA/Driver CMOS Photonics (AWG+PD) 멀티채널고속전기신호인터페이스원천기술확보 실시간 OFDM 광모뎀구현기술 실시간전송성능감시 / 측정가 능 실시간전송변수의최적화를

26 26 국내 R&D 동향 -NG-PON2 TWDM-PON OLT 용광트랜시버 (CFP 형 ) CMOS 포토닉스기반 AWG, 광검출기단일집적화기술 Array TIA/Driver CMOS Photonics (AWG+PD) 멀티채널고속전기신호인터페이스원천기술확보 실시간 OFDM 광모뎀구현기술 실시간전송성능감시 / 측정가 능 실시간전송변수의최적화를 통한전송효율극대화 변수 물리계층최대전송대역폭 운용가능한서브캐리어수 U of Bang ore ( 영국 ) Real-time Gb/s 15 EA ETRI ( 한국 ) Gb/s 117 EA 비고 고정변조방식실시간모뎀기준세계최고수준 망자원의효율적활용극대화 10G EPON Reach Extender 기술 Wavelength Conversion 4ch COT 58 db Link Budget 제공가능 기존 10Gb/s WDM 정합을통 한전송링크용량확장 WDM/TDMA 기술을통한비즈 니스서비스망최적화가능 Legacy WDM Interconnection 변수 10Gb/s Burst-mode CDR (Fast locking) 4ch RT 10Gb/s Burst-mode Signal Detection IEEE802.3bk Extended ETRI 비고 E-PON 이득 dB 10Gb/s PBEx기술 거리 40km 80km 선점 채널 확장가능

27 27 국내 R&D 동향 -Photonic Integration 10Gbps Silicon Modulator [Modulator Layout] [Modulator Photo] 10Gbps Ge Photodiode [Photodiode Layout] [Photodiode Photo]

28 국내 R&D 동향 -OFDMA-PON 광 OFDM 변복조모뎀기술 multi carrier 변조 / 전송 M-QAM 초고속, 광대역전송가능기술 최대 100 Gb/s 상 / 하향전송 장거리전송 100 km 망자원의유연한활용가능 시간 / 주파수영역에서의자원할당 투명한서비스 경제성 고속 DSP를활용한구현 단순한광기술 (IM/DD) 활용 OFDM 변조부

28 28 국내 R&D 동향 -OFDMA-PON 광 OFDM 변복조모뎀기술 multi carrier 변조 / 전송 M-QAM 초고속, 광대역전송가능기술 최대 100 Gb/s 상 / 하향전송 장거리전송 100 km 망자원의유연한활용가능 시간 / 주파수영역에서의자원할당 투명한서비스 경제성 고속 DSP를활용한구현 단순한광기술 (IM/DD) 활용 OFDM 변조부 (ONU) EDFA PD RF amp. RF att. SMF 40km OFDM 복조부 (OLT) RF amp. 12 db RF att. DFB-LD 1X64 Splitter < 광 OFDM 모뎀전송성능시험환경구성도 > 21 db MAC_FPGA OFDM MAC 플랫폼 OFDM 4 GS/s DAC 모뎀 Tx OFDM 4 GS/s ADC 모뎀 Rx 광송신기 광수신기 PLL (CLK.) n-bit/symbol < 광 OFDM 모뎀시제품 > < 광 OFDM 모뎀 / 링크통합전송성능시험환경 >

29 29 국내 R&D 동향 -Reach Extender DWDM introduced in feeder span to increase link capacity - DWDM, CWDM, T-LD, RSOA injection locking, etc. Requirement for reach extender - Recovery an optical signal within existing ODN - Provide remote management using OMCI or user defined OAM - Control an upstream burst signal(reset or Reset-less needed) - Change upstream burst signal to continuous signal

Wavelength Converter 8-channel Extender 16-channel Extender

30 30 국내 R&D 동향 -Reach Extender GPON RE EPON RE 10G/1G EPON RE 2-channel Extender 16-channel Wavelength Converter 16-channel Wavelength Converter 8-channel Extender 16-channel Extender 4-channel Extender 10G/10G EPON RE 16-channel Extender 10G-EPON Extender Line card

31 국내 R&D 동향 -Reach Extender Items Maximum channel insertion loss (db) PR30 PMD Extended PMD (PR40) Bit-level OEO-based RE (ETRI) 29 33 58 Minimum range 0.5 m to 20 km 0.

31 31 국내 R&D 동향 -Reach Extender Items Maximum channel insertion loss (db) PR30 PMD Extended PMD (PR40) Bit-level OEO-based RE (ETRI) Minimum range 0.5 m to 20 km 0.5 m to 40 km 0.5 m to 60 km Split ratios 1:32 1:64 1:128 Number of fibers 1/Port 1/Port 1/Multiple Ports Transmission Rate (Gb/s) x (# of WDM) Giga 인터넷 용량증대

32 EU FP 연구동향 EU FP C-3PO 연구동향 C-3PO (Colourless and Coolerless Components for low Power Optical networks, 20

32 32 EU FP 연구동향 EU FP C-3PO 연구동향 C-3PO (Colourless and Coolerless Components for low Power Optical networks, ~ , 2.60 million euro) Coordinator: University College Cork, National University of Ireland, Cork( 아일랜드 ) Participants: Polatis Ltd( 영국 ), Interuniversitair Micro-Electronica Centrum Vzw( 벨기에 ), Constelex Technology Enablers Ltd( 그리스 ), The Centre for Integrated Photonics Limited( 영국 ), Adva ag Optical Networking( 독일 ) 목표 : 고온안정성과비용 -/ 에너지 - 저감을위한 DWDM 기반 Photonic-integrated multi-wavelength laser source 개발 핵심기술 : Reflective Photonic Integrated Circuit, Low-power SiGe driver, DWDM channel generator linecard, Reflective TX array, Multi-degree reflective ROADM, Data-center interconnection Cooled photonics, Colored linecards C-3PO for IPoDWDM <C-3PO next-generation access network> As is <C-3PO system> To be

33 EU FP 연구동향 EU FP FOX-C 연구동향 FOX-C (Flexible Optical Cross-connect Nodes enabling next generation flexible optical networking, 2012.10.01.~2015.09.30., 3.

33 33 EU FP 연구동향 EU FP FOX-C 연구동향 FOX-C (Flexible Optical Cross-connect Nodes enabling next generation flexible optical networking, ~ , 3.64 million euro) Coordinator: Optronics Technologies A.B.E.T.E.( 그리스 ) Participants: Research and Education Lab. in Information Tech.( 그리스 ), University College Cork, National University of Ireland, Cork( 아일랜드 ), Finisar Israel Ltd( 이스라엘 ), W-ONE SYS SL( 스페인 ), The Hebrew University of Jerusalem( 이스라엘 ), Aston University( 영국 ), France Telecom SA( 프랑스 ), Karlsruher Institut Fuer Technologie( 독일 ) 목표 : Connectivity-demand 에따라스위칭노드에서 Automation 을통해네트워크환경 (link capacity, bandwidth, switching) 을설정 핵심기술 : Flexible transponder 기술, Flexible switching 기술, Multicarrier 시스템을위한 network planning 및 control plane 연구 <COMBO 프로젝트개념도 > < 스위치노드에서의링크용량계층화 >

34 EU FP 연구동향 EU FP ASTRON 연구동향 ASTRON (Adaptive Software defined Terabit transceiver for flexible Optical Networks, 2012.10.01.~2015.09.30., 4.61 million euro) Coordinator: Optronics Technologies A.

34 34 EU FP 연구동향 EU FP ASTRON 연구동향 ASTRON (Adaptive Software defined Terabit transceiver for flexible Optical Networks, ~ , 4.61 million euro) Coordinator: Optronics Technologies A.B.E.T.E.( 그리스 ) Participants: Research and Education Lab. in Information Tech.( 그리스 ), University College London( 영국 ), Enablence Switzerland AG( 스위스 ), Finisar Israel Ltd( 이스라엘 ), Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V( 독일 ), ECI Telecom LTD.( 이스라엘 ), Aifotec Fiberoptics GMBH( 독일 ), National Institute of Information and Communications Technology( 일본 ), Universita Delgli Studi Roma Tre( 이탈리아 ) 목적 : Adaptive-rate-transceivers 를이용하여, traffic-demand 에따라 optical path 및 bandwidth 를할당 핵심기술 : Bit-rate flexible optical transceiver, Photonic integrated chip, Optical OFDM/Nyquist WDM, Programmable modulation format, Programmable data rate, Programmable FEC Adaptive Optical Transmitter Adaptive Optical Receiver <Software-defined Terabit transceivers 를이용한 flexible optical network 구조 >

35 EU FP 연구동향 EU FP COCONUT 연구동향 COCONUT (COst-effective COhereNt Ultra-dense-WDM-PON for lambda-to-the-user access, 2012.11.01.~2015.10.31., 3.

35 35 EU FP 연구동향 EU FP COCONUT 연구동향 COCONUT (COst-effective COhereNt Ultra-dense-WDM-PON for lambda-to-the-user access, ~ , 3.97 million euro) Coordinator: Scuola Superiore di Studi Universitari e di Perfezionamento Sant'anna ( 이탈리아 ) Participants: Ericsson AB( 스웨덴 ), OPTRONICS Technologies A.B.E.T.E.( 그리스 ), III V LAB GIE( 프랑스 ), Promax Electronica S.L.( 스페인 ), British Telecommunications Public Limited Company( 영국 ), Uvibersitat Politecnica de Catalunya( 스페인 ), Research and Education Laboratory in Information Technologies( 그리스 ) 목표 : λ-to-the-user(1g-to-the-home + 10G-to-the-Antenna) 개념의 40G + Ultra Dense WDM 솔루션개발 10G mobile back-haul 핵심기술 : Coherent transmission 및 detection 기술, 고속 DSP 기술, 파장제어및스펙트럼관리기술, Polarization handling 및 OBI 저감기술연구 OLT ONU Time/wavelength assignment function

36 EU FP 연구동향 EU FP DISCUS 연구동향 DISCUS (The DIStributed Core for unlimited bandwidth supply for all Users and Services, 2012.11.01.~2015.10.31., 11.

36 36 EU FP 연구동향 EU FP DISCUS 연구동향 DISCUS (The DIStributed Core for unlimited bandwidth supply for all Users and Services, ~ , million euro) Coordinator: The College of The Holy & Undivided Trinity of Queen Elizabeth near Dublin( 아일랜드 ) Participants: Interuniversitair Micro-Electronica Centrum Vzw( 벨기에 ), University College Cork, National University of Ireland, Cork( 아일랜드 ), III V LAB( 프랑스 ), Polatis Ltd( 영국 ), Alcatel-Lucent Deutschland AG ( 독일 ), Telecom Italia S.P.A( 이탈리아 ), Coriant R&D GMBH( 독일 ), Atesio GMBH( 독일 ), Kungliga Tekniska Hoegskolan( 스웨덴 ), Aston University( 영국 ), Telefonica Investigacion y Desarrollo SA( 스페인 ) 목표 : Clean-state 접근법에의한 Common PHY Infrastructure 를갖는네트워크구조및대역폭자원의유연성제공연구 핵심기술 : Long-reach access 기술, Flat optical core(=oeo 및 Electronics 절감 ) 기술, 네트워크자원공유기술, 에너지 - 저감의유무선네트워크통합기술연구 <DISCUS architecture> <CO-metro network bypass>

37 EU FP 연구동향 EU FP COMBO 연구동향 COMBO (COnvergence of fixed and Mobile BrOadband access/aggregation networks, 2013.01.01.~2015.12.31., 11.

37 37 EU FP 연구동향 EU FP COMBO 연구동향 COMBO (COnvergence of fixed and Mobile BrOadband access/aggregation networks, ~ , million euro) Coordinator: JCP-Consult SAS ( 프랑스 ) Participants: DOCOMO Communications Lab. EU GMBH( 독일 ), France Telecom SA( 프랑스 ), Centre Tecnologic de Telecommunicacions de Catalunya( 스페인 ), Adva Ag Optical Networking( 독일 ), Fon Wireless Ltd( 영국 ), Aitia International Informatikai Zartkoruen Mukodo RT( 헝가리 ), Telefonica Investigacion y Desarrollo SA( 스페인 ), Deutsche Telekom AG( 독일 ), Adva Optical Networking Limited( 영국 ), Lunds Universitet( 스웨덴 ), Alcatel-Lucent Italia S.P.A.( 이탈리아 ), Ericsson AB( 스웨덴 ), Budapesti Muszaki es Gazdasagtudomanyi Egyetem( 헝가리 ), Institut Mines-Telecom( 프랑스 ), Politecnico di Milano( 이탈리아 ), Telnet Redes Inteligentes SA( 스페인 ) 목표 : QoE 향상및비용 -/ 에너지 - 저감을제공하는 Multi-operator FMC 기술 핵심기술 : 네트워크플랫폼제어기술, 네트워크동기기술, 무선셀핸드오버지원기술, 유무선자원통합제어기술연구 <COMBO project concept> <COMBO technical approach>

38 38 IV. NG-PON3 전망 3 전망및 후보기

39 39 광가입자망기술표준화 NG-PON2 표준제정완료에따라후속기술에대한기술백서작성 15 년하반기착수예정 백서작업에이어후속기술 ( 가칭 NG-PON3) 에대한표준화착수 ( 16 년하반기 ~ 17 년상반기 )

40 NG-PON3 필요성 - 표준화관점 Joint ITU/IEEE Workshop on Ethernet(Sept. 2012) 40

41 NG-PON3 요구사항 Optical access being residential users dominated is more driven by Higher performance Lower OPEX, Lower cost Higher speed (with higher bandwidth) Longer reach Lower power consumption

41 41 NG-PON3 요구사항 Optical access being residential users dominated is more driven by Higher performance Lower OPEX, Lower cost Higher speed (with higher bandwidth) Longer reach Lower power consumption NG-PON3 will be introduced: Wavelength flexibility appears as a limiting factor for deployment To simply wavelength spectrum allocation (co-existence) To achieve a green efficiency (NG-PON3 could be developed due to strict power consumption figures) To achieve versatile customer (high rate and low cost ONU) Source: Post NG-PON2 : Can the spectrum be exploited more intensively in PON s?, OFC workshop on NG access, OTh3A.7, OFC 2013 is working on FDM PON with Photonics Silicon devices to enlighten the future of PON: Only 2 wavelength (one Up and one Down) Co-existence of high and low bit rate ONUs

42 42 Key Elements for NG-PON3 Transmitter at OLT Monolithic / Hybrid Photonics Integrated Circuit (PIC) / CMOS / Array Optics Novel packaging Provides small size and power consumption, cost advantage Dispersion and non-linearity in fiber is no longer negligible at higher line rate Receiver at ONU Monolithic / Hybrid Photonics Integrated Circuit (PIC) / CMOS / Array Optics Increased sensitivity with PON BW EDC needed APD and power control are already used in 10G PON High-speed FEC is unavoidable -> latency High-speed RF electronics increase complexity, power and cost. Other remedies Use optical amplifier to improve sensitivity Is it worth the complexity to go to coherent transceiver techniques?

43 43 맺음말 NG-PON2 표준화는 15년상반기에완료예정이며, 시장형성전망액세스망은고속화, 광역화, 유무선융합방향으로기술의진화이동통신의유선구간 ( 프론트홀 ) 을수용하는통합플랫폼으로진화 OLT와 DU의통합플랫폼 Legacy PON 수용하는하이브리드플랫폼 SDN 기반액세스망기술로진화 망신뢰도를높이기위한가상화, 지능화, 유연화 CapEx, OpEx 절감

FTTH 기술발표

FTTH 기술발표 2 3 xdsl /UTP FTTH / 2002 2005 2010 2 Mbps 6 Mbps 100Mbps * 10 Mbps 45Mbps 155Mbps FTTO / FTTD / Digital (DBS) 53Mbps/4km LMDS ADSL : Asymmetric Digital Subscriber Line HDSL : High speed Digital Subscriber