기가인터넷시대 - HFC/DOCSIS 네트워크및기술진화전략 송영수이사 Cisco Systems, GSP CSA
AGENDA 1. 국내외 Broadband 가입자망고도화동향 2. DOCSIS 기술진화 (DOCSIS 3.1 중심으로 ) 3. SDN for Cable 4. DOCSIS3.1/CCAP Migration Plan 5. 시스코차세대 CMTS 솔루션전략 6. 요약 2
1. 국내외 Broadband 가입자망고도화동향
Cable Operator 의주요 Challenges More Video More Personal More Devices Speed competition Keep up with unprecedented bandwidth growth Pressure to reduce rack space and power Migrate to an all-digital / all-ip network with the existing infrastructure 4
해외 Broadband Access 망고도화동향 국가 Initiative 정부동향주요사업자동향 / 전략 미국 Giga 인터넷인프라구축 FCC 의 Giga City 서비스 Project 추진및 Funding/ 정책지원 Google, AT&T 및 Verizon FTTH 기반 300M~1G 급인터넷서비스지역확대중 LA 시에서 Giga-City Project RFI 진행 Time Warner 등 MSO : 경쟁이심한도시중심으로 HFC/DOCSIS3.0 을통한 300Mbps 서비스 Launch, 향후 D3.1 Upgrade 를통한전지역 1Giga 급확대계획 일본 유비쿼터스사회실현 UNS(Ubiquitous Network Society) 전략으로차세대네트워크기술, Communication, 안심 / 안전기술등중점연구개발중 NTT 의적극적인 FTTH 투자로전세계에서 FTTH 가가장많이보급된나라 (3600 만인터넷가입자중 2600 만 FTTH 가입자 ) J-COM(KDDI 와 Sumitomo JV) - 20 개의 SO 를보유하고있는일본최대 MSO 로, DCATV 410 만, 인터넷 (CM) 280 만가입자보유 ( 케이블방송약 50% 의시장점유 ) - KDDI 의 mobile 서비스를 J:Com 의가입자한테번들형태로제공 J:Com 전략 : FTTH 보다는케이블에대한확장투자로대처 - 2014 년 3 월 DOCSIS3.1 을겨냥한 NG CMTS RFP 공고를시작으로케이블망의중장기진화를시작 - 향후 4K/8K IP Video 트래픽 Demand 반영 5
미국 Broadband 제공속도전망 6
미국주요 ISP 사업자동향 GigaPower Austin 지역초기 300Mbps 에서 2014 년 8 월 1Gbps 로 Upgrade 21 개주요 Metro 지역 100 개대도시 ( 샌프란시스코, 시카고, LA, 애틀란타등 ) 서비스확대중 (2014 년 4 월 Plan 발표 ) Giga 인터넷 Kansas City 에서시작하여현재 3 개지역상용서비스, 9 개 Metro 지역 34 개도시로확대계획 - 1Gbps 급월 70$ 에제공 - Kansas City Network 구축 : 84M$ 소요 현재 16 개지역에서 Giga 인터넷제공 7
미국 MSO Giga 인터넷대응동향 HSD 가입자 11M 기존 HFC 망에서뉴욕 /LA/ 오스틴 / 텍사스지역에 300Mbps/20M 급서비스 ( 월 65$) 21015 년추가로 7 개도시에서비스확대계획 기존 HFC /D3.0 활용빠르고경제적인대응 (2014 년 10 월상용서비스 ) 2016 년까지전역으로확대계획 (HFC/D3.1 기술기반 ) 현재 150Mbps 서비스 2015 년말이후 HFC/D3.1 기반기가서비스확대 Plan 수요및수익성의불확실성으로 Ultra High Speed 서비스제공에부정적이었던미국주요 ISP 들이최근시장의 High BW 수요증가와 Google Fiber 등경쟁환경변화에따라 300M ~ 1Gbps 의인터넷서비스를확대하기시작 8
Broadband 가입자망고도화 MSO 의 Top Priority Cox CTO Outlines MSO s Tech Priorities Your Top Priority 는? Network transformation : 년내대부분지역 50M~100Mbps 제공, 기가인터넷서비스준비 All-digital project : DTA 최종 Test 단계, 2014 Q4 이후본격적디지털전환 (2016 년완료목표 ) Future-state video : Comcast X1 platform 활용방안포함 Future platform 검토중 Cox Business commercial sector Giga Internet 계획은? Top priority 임, Gigablast bland 로 Phoenix 지역에 1Giga 서비스 10 월출시 ($99/month, bundle 시 $69), LA 및 Omaha 지역 Next Launch 예정 초기 Phoenix 지역의경우 Green Field / MDU 를주 target 으로 1Giga 서비스추진 기술은 FTTH 과 HFC/DOCSIS 를병행, 궁극적으로는 HFC/DOCSIS3.1 Upgrade 을통해 2016 년까지전지역 Giga 인터넷서비스제공 Plan 4K and Ultra HD in Cox? 시장수요측면에서아직초기단계, Cox 는준비되어있으며시장측면에서의시기의문제임 WiFi deployment? Metro WiFi deployments 좋은반응, Metro WiFi 를 Gig Life 와연계해서비스지역확대예정. Home-as-a-hotspot 은현재검토중이며, Cox Business footprint 에 second SSID [service set identifier] 제공여부검토중 9
국내사업자별기가급인터넷서비스동향 10 월 20 일 500M/1G 서비스출시 - 1G/10G EPON for Fiber & UTP - G.hn for xdsl 10 월 30 일 500M/1G 서비스출시 - GPON for Fiber & UTP - 16 채널본딩 for HFC 2014 년 11 월 30 일 500M/1G 서비스 - EPON & 스위치 일부특등급 / 일등급아파트 - RF Overlay & EPON 일부 MSO HFC 기반 300Mbps 서비스 (DOCSIS 8 채널본딩 ) 통계 : 2015 년 1 월기준미래부통계자료참조 10
2. DOCSIS 기술진화
DOCSIS 기술진화 History CCAP DOCSIS 3.1 2013 년 10 월 29 일 Spec 발표 OFDM / LDPC 기술채택 DOCSIS 3.0 2006 년 8 월 4 일표준발표 Certification Waves since Q4, 2007 DS/US Channel Bonding, Bonded Multicast, IPv6, AES etc DOCSIS 2.0 2001 년 4 월표준발표 Certification Waves in 2002 HSD : DS 40Mbps / US Max 30Mbps DOCSIS 1.1 1999 년 4 월표준발표 Certification in 2001 QoS (UGS,UGS-AD,RTPS 등 ) Security (BPI+) DOCSIS 1.0 1997 년 3 월 26 일 DOCSIS1.0 표준발표 Certification in 1999 Data service Standard Specification on HFC Best effort services 12
DOCSIS 3.1 은? Answer: The latest Data Over Cable Service Interface Specifications CableLabs - release history of DOCSIS3.1 Spec I01 Released 10/29/13 I02 Released 03/20/14 I03 Released 06/10/14 I04 Released 12/18/14 PHY Spec : 242 page MAC and upper layer : 795 page 13
DOCSIS3.1 이추구하는목표는? DOCSIS 3.0 에머물지않는이유는? DOCSIS 3.0 도기가급속도까지확대가능 DOCSIS 3.1 은기존 single carrier QAM(SC-QAM) 보다더빠른속도구현및데이터전송효율이더높은기술 Goals 하향 10+ Gbps 구현 상향 2+ Gbps 구현 기존 DOCSIS 3.0, 2.0, & 1.1 과호환 Better spectral efficiency (more bits/hz) This will allow DOCSIS 3.1 to support services competitive with FTTH. Deployable in today s HFC networks! 14
HFC/DOCSIS 기술및최대제공속도 DOCSIS 3.1 Co-existence w/ D3.0 OFDM & OFDMA Improved FEC - LDPC Downstream Mod. to 4k QAM Upstream Mod to 1024 QAM HFC 주파수범위 / 데이터속도 65Mhz 100Mbps 85MHz - 400Mbps US 200MHz 1Gbps 750/870Mhz 1Gbps 1.2GHz 7Gbps 1.7GHz 10Gbps DS 15
SC-QAM vs. OFDM Concept One SC-QAM signal within one channel Multiple subcarriers within one channel One Channel One Channel OFDM fall off faster at band edges 16
Amplitude Amplitude OFDM: a graphical look Pilot PHY link channel Data (interleaved) Zero bit loaded Pilot Next codeword pointer (interleaved) Excluded subcarriers (zero power) Frequency 1.0 0.8 0.6 0.4 0.2 0-0.2-0.4 1/T Frequency The subcarrier spacing in DOCSIS 3.1 is 25 khz or 50 khz OFDM sub-carriers can be packed tightly without interfering with each other 17
주파수이용효율향상및 Plant Adaptation OFDM for upstream, downstream Robust operation, efficient use of spectrum Multiple narrow sub-carriers transmitted together in a block ( 하향 4K / 8K mode, 상향 2K / 4K mode) No more 6/8 MHz channel restrictions Enables plant adaptation Adjustment to channel conditions with 25-50 khz resolution Operation into band edge Easy expansion into available spectrum 주요응용분야 : 무선 LAN, Wibro, LTE 등 18
Spectrum Efficiency 비교 Single carrier QAM Unused spectrum due to roll-off OFDM channels Smaller guard band No Roll Off Wide OFDM channel No unused spectrum 19
OFDM channels DS OFDM Channel Bandwidth - 24 MHz to 192 MHz in size - Example block size is 192 MHz ( 32x6 MHz, 24x8 MHz ) - For example, a 2x1 CM could be 384 MHz DS, 96 MHz US US DS FFT mode 2K 4K 4K 8K CH bandwidth (MHz) 10-96 6.4-96 24-192 24-192 Subcarrier spacing (khz) 50 25 50 25 Max number of subcarriers 1900 (74 <= k <= 1973) 3800 (148 <= k <= 3947) 3800 (148 <= k <= 3947) 7600 (296 <= k <= 7895) 20
LDPC FEC 에러복구기술 DOCSIS 3.1 uses a form of FEC known as LDPC LDPC = Low Density Parity Check LDPC 이론은 1960 년 Robert Gallager 가발표 Because of encoder and decoder complexity, it wasn t practical to implement LDPC until relatively recently More robust than Reed-Solomon FEC Provides up to 5~6 db gain compared to RS FEC 주요응용분야 : 10Gbase-T, 802.11n, 광통신, HDD 신호처리 21
DOCSIS 3.1 하향주파수범위 54 MHz 108 MHz 258 MHz 750 MHz 1002 MHz 1218 MHz 1794 MHz DOCSIS 3.1 하향주파수 : 258 MHz to 1218 MHz Optional 108 MHz lower end Optional 1794 MHz upper end 192 MHz-wide OFDM channels 최소 2 개까지지원할수있어야함 채널대역폭 : 24MHz ~ 192Mhz 22
DOCSIS 3.1 상향주파수범위 5 MHz 42 MHz 65 MHz 85 MHz 117 MHz 204 MHz 258 MHz DOCSIS 3.1 상향 : 5 MHz to 204 MHz - Also must support 5 MHz to 42 MHz, 5 MHz to 65 MHz, 5 MHz to 85 MHz, and 5 MHz to 117 MHz 96 MHz-wide OFDMA channel 최소 2 개까지지원할수있어야함 채널대역폭 : 6.4MHz ~ 96MHz 23
Downstream profiles Multiple downstream profiles could enable operators to leverage SNR/MER variation to improve system capacity Worst Case Average Case Best Case Example with four profiles: A: Worst (say, mostly 256-QAM) B: Average (say, mostly 1024-QAM) C: Better (say, mostly 2048-QAM) D: Best (say, mostly 4096-QAM) 24
DOCSIS3.1 의 SNR 대전송효율 4096 QAM 1024 QAM 256 QAM 64 QAM 29dB 35dB 42dB 예, 기존 HFC 환경변경없이, 하향 256 QAM 에서 1024QAM, 상향 16/32QAM 을 64QAM 으로 upgrade 가능 25
SC QAM to OFDM Targets Approximate Data rate for 6 MHz Channel Mbps RF Spectrum Required to support 1 Gbps (MHz) Modulation Bits/Sym MER SCQAM MER OFDM w/ LDPC QPSK 2 15 12 9 667 8QAM 3 18 15 14 444 16QAM 4 21 18 18 333 32QAM 5 24 21 24 255 64QAM 6 27 24 28 212 128QAM 7 30 27 33 182 256QAM 8 33 30 38 159 512QAM 9 36 33 42 141 1024QAM 10 39 36 49 122 2048QAM 11 42 39 54 111 4096QAM 12 45 42 59 102 8192QAM 13 48 45 64 94 16384QAM 14 51 48 69 87 Data Rates are +/- 10% for differences in overhead Docsis 3.0 standard for Upstream Upstream vs. Downstream and Reed Solomon vs. LPDC Docsis 3.0 standard for Downstream Docsis 3.1 proposed standard for both Upstream and Downstream 26
Concepts for CM Energy Management PHY Set-up DS Send US Send Wake-up Sleep On-Time Off-Time The CMTS could duty-cycle CMs. For example: 4 ms on, 196 ms off 2% duty cycle Idle 시간에 CM 은 "Energy Management 1x1 Mode" 로불리는 Low power 모드로동작 (1 개상향및하향채널로운용 ) CMs with traffic below a certain threshold could be placed in EM. CM hardware could be designed to reduce power. 27
초기 DOCSIS3.1 OFDM 운용예 Legacy digital video SC-QAM signals Legacy DOCSIS SC-QAM signals in excluded-subcarrier spectrum within OFDM channel OFDM OFDM One 192 MHz OFDM channel Excluded subcarriers ( nulling ) can be used to facilitate coexistence of an OFDM channel with legacy SC-QAM signals The OFDM subcarriers can be located in available spectrum Windowing can be used to sharpen the spectral edges of the OFDM signal Legacy DOCSIS SC-QAM and DOCSIS 3.1 OFDM can be bonded 28
DOCSIS 3.1 상 / 하향주파수운용예 OFDMA and legacy SC-QAM Legacy SC-QAM Digital Video OFDM OFDM OFDM (future) 5 MHz 258 MHz 750 MHz 870 MHz 1002 MHz 1218 MHz 85 MHz 105 MHz 192 MHz 192 MHz 192 MHz Upgrade split to 5-85 MHz upstream, 105 MHz to 1002 MHz (or 1218 MHz) downstream Legacy SC-QAM digital video in the 108 MHz to ~600 MHz spectrum Two 192 MHz wide OFDM signals from 618 MHz to 1002 MHz (optional third OFDM >1 GHz) Mix of OFDMA and legacy SC-QAM in upstream 29
Additional example spectrum options Downstream spectrum options: 1. Initially use 750/862/1002 MHz plant (6 Gbps) 2. Next step is 1218 MHz (7+ Gbps, amp upgrade) 3. Long-term is 1794 MHz (10+ Gbps, tap upgrade) Upstream spectrum options: 1. Initially use sub-split (42/65 MHz, 200 Mbps) 2. Next step is mid-split (85 MHz, 400 Mbps) 3. Long-term is high-split. (204 MHz, 1 Gbps) 30
Technology potential of DOCSIS 3.1 DOCSIS 3.0 DOCSIS 3.1 Initial Future Initial Future DS Range (MHz) 54* - 1002 108-1002 258-1218 504-1794 DS QAM Order 256 256 256-4096 256-16,384 # DS Channels 8 SC-QAM 24 SC-QAM 5 x 192 MHz 6 x 192 MHz DS Capacity 300 Mbps 1 Gbps 8 Gbps 10 Gbps US Range (MHz) 5-42 5-85 5-85 5-204 5-400 US QAM Order 64 64 256-4096 # US Channels 4 SC-QAM 12 SC-QAM 2 x 96 MHz 4 x 96 MHz US Capacity 100 Mbps 300 Mbps 400 Mbps 1 Gbps 2.5 Gbps *Note: In this example the downstream spectrum starts at 54 MHz, but DOCSIS 3.0 signals are carried above 108 MHz. 31
Backwards compatibility DOCSIS 3.1 단말은기존 SC-QAM 채널과 OFDM 채널을동시에지원 단말은하향 OFDM 과 SC-QAM 간본딩가능 DOCSIS 상향의 time division 특성으로기존 DOCSIS 와 OFDMA 간 Mux 가능 DOCSIS3.1 로의점진적인 Migration 가능 32
3. SDN for Cable
Current model for operations and management OSS App1 OSS App2 Script based app Applications complexity complexity complexity Management Platforms High Opex Low resource usage efficiency Low Service Deployment Velocity SNMP Server IPDR Telnet/SSH PCMM Network Platforms HFC CM CPE 34
SDN architecture for cable 35
CCAP 분석예 : Topology View & RF 채널부하율 Description: 포트또는각슬롯의모든 RF 채널에대한실시간 View 제공. 색깔로부하율반영. Value : 모든 RF 채널에대한실시간상태정보제공. 부하율이높은채널에대한실시간파악 36
응용예 : Bonding Groups Built on Demand Cisco Apps Customer Apps ISV Apps Open Src Apps 1 Modems advertise capabilities 4, 8,16, 24, 32 channels REST OSGI Cisco Advanced Functions Core Functionality More Coming 3 SDN Application builds the necessary bonding groups for the modem capabilities 2 SDN Application receives the capabilities from the modem onepk OpenFlow Cisco SDN Controller More Coming 4 4 SDN Application then monitors frequency utilization and builds more bonding groups and load balances the modems across multiple 4, 8, 16 channel modems 8 16 24 5 ~6,000 lines of configuration eliminated 37
응용예 :D3.1 OFDM/OFDMA Profile Manager 1218 f B C D A Description OFDM has 1000 s of subcarriers whose modulation needs to be determined. Profiles allow 1026 834 A B A B C D Customer Value Very High 30% to 50% plant efficiency can be achieved with proper profile management. 642 450 A B C D A B C A B C D D Cisco Value Very High Cisco invented profiles for D3.1. This is a critical part of Cisco being a leader with D3.1. Provides product differentiation. 258 204 5 Upstream 2 x 96 MHz channels t Definition High Cisco wrote the book. We have multiple white pape rs, presentations, and SMEs. Applicable to downstre am and upstream directions. 38
SDN: How Many OFDM Subcarriers Need Managing? 7680 subcarriers per 192 MHz block @ 25 KHz x 4 profiles per DS port x 5 blocks per full spectrum = 153,600 sub-carriers per CMTS port 153,600 sub-carriers per CMTS port x 56 ports/cmts = 8.6 million subcarriers per CMTS! Every sub-carrier modulation choice is a result of a test and measure operation. 39
4. DOCSIS3.1/CCAP Migration Plan
Migration to all IP Services 41
DOCSIS3.1 규격상용화일정전망 2014 년 12 월 : 1 st IOP 진행 2015 년 1 월 : 2 nd IOP 진행 2015 년 Q2 부터 DOCSIS 3.1 CM/GW 인증계획 D3.1 Chipset 개발벤더 : Broadcom, Intel and STMicroelectronics 42
Leverage Existing Cable Access Infrastructure Deliver Gigabit Tier Across ubr10k Footprint 1Gb Services over ubr10k with up to 24/32 channel modems Broad, cost effective, rapid deployment feasible Converge VOD & Data Reduce rack space, power & cooling 43
Delivering CCAP with High Performance cbr-8 Unmatched Density 10x the bandwidth of existing CMTS platforms Reduce hub space & power by up to 50% Ground-up design for DOCSIS 3.1 Scaling to 10Gbps DS & 2Gbps US per Service Group Convergence of all Broadcast and Narrowcast services 44
중장기 D3.1 & CCAP migration plan 예 - Comcast Source : Comcast [ 현재 DOCSIS 3.0] 하향 LD 채널확장 : 1~24/32 상향 LD 채널확장 : 1~4 [DOCSIS3.1 CM 상용화시 ] D3.1 CM 을기존 DOCSIS3.0 DS/US 에도입 [DOCSIS3.1/CCAP CMTS 상용화시 ] 1 단계 : 기존 Spectrum 에하 / 상향 OFDM/OFDMA 적용 2 단계 : 상향 ~200MHz 확대, 하향 1.x GHz 까지 HFC Plant upgrade 및 D3.1 CM 확대 45
5. 시스코차세대 CMTS 전략
Cisco Portfolio Strategy Products End to End Technology and Connectivity Applications SDN Applications Suite RF Plant Management Video over IP Path Optimization Wholesaling, VPN Management Cisco Evolved Services Platform Orchestration OpenStack (external) Cisco Controller (XNC, ODL) eqam RFGW-1 RFGW-10 CMTS ubr10k HFC - Installed Base - Upgrades NG-CMTS cbr8 - New Installs - Converged Hub CCAP-Core ubr10k, cbr8 RPHY SHELF NFV vcmts, vccap RPHY NODE FTTx OLT ME 4600 ONT SFU, RGW, NTA, umsan Classic HFC Cisco Evolved Programmable Network - Small Hub - Linear Fiber - Deep Fiber - Digital Fiber - High SLA Commercial - Select Residential 47
cbr-8 Chassis: Better Today, Better Tomorrow I-CMTS CCAP 설계 - 13RU, 10-slot mid-plane chassis with integrated N+1 RF Switch 샤시당서비스그룹지원용량 : 64 SG s (I-CMTS) 샤시당총 narrowcast QAM 지원용량 : 6,144 at FCS 8x16 RF Linecards SG 당총하향 BW 용량 : 4 Gbps CCAP+ : Converge all services to Hub in a Box 8x10 GE WAN ports; 160+ Gbps forwarding (at FCS) Backplane scalable 1+ Tbps cbr-8 is the 1 st and only platform on the market designed ground up for DOCSIS 3.1 48
Cisco cbr-8 Line Card: Delivers True CCAP, D3.1 and more Linecard cbr8 Downstream PHY module 8 DS ports per line card (4 DS port per module x 2 modules per line card) Field replaceable and field upgradeable to DOCSIS 3.1 DS PHY modules with simple dropin upgrade (only 3 screws required) Upstream PHY modules 16 US ports per line card Field replaceable and field upgradeable to DOCSIS 3.1 US PHY modules with simple drop-in upgrade (only 4 screws required) 49
cbr-8 Chassis Overview Chassis 13RU, 10-slot mid-plane design 8 Universal Subscriber Side slots (HFC, R-Phy, RFoG, etc) Backplane scalable to 2 Tbps RF Line Cards 8 DS ports + 16 US ports per card (8x16) Initial DOCSIS BW: 768 DS x 96US per LC (96 DS post FCS) Slots capable of 120+ Gbps bidirectional N+1 redundancy with integrated RF Switch Supervisor Cards Integrated QFP, RP Integrated backhaul capacity: 8x10 Gbps 1+1 redundancy Backhaul Cards (Optional - Future) Dedicated cards for WAN backhaul if required 1+1 redundancy Power Supplies ~9KW, typical D3.0 load 6 KW (max capacity, facilities requirement) 4+1 DC modules with 1+1 power rails 3+1/3+3 AC modules Cooling Front-to-back Air intake on card faceplate 50
Connectivity options for Integrated & Distributed RF Line Card PICs MCX connectors N+1 with integrated RF Switch Integrated analog optics (future) Remote PHY (future) Supervisor PICs 8x10 GE ports Backhaul Card PICs (Optional Future) 10/100 GE ports if required Power Connections 4+1 DC or 3+1/3+3 AC Cooling Exhaust fans 5 Field Replaceable modules 51
XFP Optics Migration into cbr-8 The XFP transmitter can be used in either the Prisma II XD or the 1RU chassis Today RF Optical Tomorrow Initially, the cbr-8 will feed the optics platform with RF The Optical Physical Interface Card (PIC) will eliminate the need for an external chassis The XFP will plug directly into the cbr-8, providing a direct link to the node RF Optical Optical 52
cbr-8 Software Architecture Intelligence, Elastic and Resilient IOS XE Middleware Chassis Manager IOSd (Active) Forwarding Manager Kernel Control Messaging Supervisor Interface Manager Cable Line Card QFP Data Plane Next generation, retains advantages of IOS and adds modularity, resiliency, restartability and patchability IOS XE = IOS + IOS XE Middleware + Platform Software Software feature richness and velocity Full IOS-XE feature parity (MPLS, VPN, L3) Full DOCSIS feature set (VDOC, BSOD, etc.) L2 DOCSIS CA Forwarding Manager US Scheduler MPEG Transport Interface Manager PHY MAC PHY Service Velocity through SDN functionality Operational Consistency - same look and feel as IOS Router Kernel Line Card Software MAC and PHY Complex 53
cbr-8: Reimagining the CMTS SDN and NFV Ready SDN Application Suite SDN Orchestration Operational Simplicity with SDN Service Velocity with NFV Hub Consolidation with Remote-P HY and SDN/NFV Massive Scalability 1+ Tbps Backplane Highest Density per RU 6000+ DS channels, 56 to 64 S Gs with full 3.0, 3.1 & Video Unmatched Software Resiliency Software Process Restart Hitless Upgrades Zero Packet Loss Failure Recovery Performance with Intelligence 200Gbps QFP Forwarding High Performance Control Plane Rich Feature Set including Cable and Cisco Layer 3+ features! 54
6. 요약
Summary 주요국가의정부 / 사업자브로드밴드가입자네트워크고도화및기가인터넷인프라추진 DOCSIS 기술진화및 D3.1 주요이점 - DOCSIS3.0에서하향 1Gbps 지원가능 - DOCSIS3.1에서첨단 OFDM 변복조 & LDCP 에러정정기술채택 - 기존 HFC Plant의변경없이도데이터전송품질및속도향상, HFC Plant 확장시하향 10G/ 상향 1G 구현 DOCSIS3.1/CCAP 일정및 Migration 전략 - CableLabs 에서 2015 년 Q2 이후 DOCSIS3.1 Certificate 시작예정 - Comcast, Cox 등주요 MSO DOCSIS3.1/CCAP 도입 Planning 중 차세대 CMTS cbr-8 은케이블사업자의향후혁신적인서비스진화및가입자망경쟁력을높이기위한 Full DOCSIS3.1, CCAP 및 SDN 기반 Platform "There isn't anything we cannot do with HFC networks that we can do with fiber. -- Salinger, VP Comcast 56
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