Delaware Valley SCTE Comparing RF-over-Glass to HFC. Bill Dawson VP Business Development ARRIS Access & Transport bill.dawson@arrisi.

Transcription

1 Delaware Valley SCTE Comparing RF-over-Glass to HFC Bill Dawson VP Business Development ARRIS Access & Transport December 8, 2010

2 Agenda RFoG basics - what is RFoG? Why choose RFoG? Points of comparison with HFC - Outside Plant Architecture - Wavelengths - Downstream transmission - Upstream transmission - Bandwidth - Loss budget - Cost Factors Key devices similarities & differences RFoG End-of-Line Performance Compatibility & coexistence with other services Standards status ARRIS Confidential and Proprietary 2

3 RFoG Basics: -What is it? -Why use it? ARRIS Confidential and Proprietary 3

4 What is RF-over-Glass? RF-over-Glass (RFoG) delivers triple play CATV services through a PON style FTTH network infrastructure - Essentially HFC with fiber extending to the home/business - Fiber To The Home / Passive Optical Network - Coax portion of the network starts at the customer premise. - Traditional cable installation practices are leveraged Use existing CATV subsystems for Video, Data and Voice - RF headend optical transmission - Major difference is C-band transmitters (1550 nm) with EDFA s - CATV Headend & CPE Services Equipment - Same Video modulation as for HFC analog and digital QAM - DOCSIS/Packetcable delivers the data and VoIP services - Same Backoffice systems billing, provisioning, etc Outside plant has no bandwidth constraints Upstream split (5-42 MHz) is built into the CPE 750 MHz/870 MHz/1 GHz all work fine Outside plant fiber architecture mirrors EPON/GPON architecture RFoG leverages existing CATV subsystems with migration path for future FTTH/PON ARRIS Confidential & Proprietary 4

5 Why Choose RFoG Futureproof with bragging rights today - FTTH connectivity lets you claim parity with other FTTH technologies - Upgradeable to 1G/10G EPON without changing outside plant, simply changing electronics at the ends Design fundamentals are based on HFC technology. Transparent operation - Use existing headend and customer premise equipment. Lowest cost architecture for certain scenarios Low Outside Plant maintenance - No CLI or sweep and balance required Reduced powering costs via elimination of actives Compatible with Gigabit EPON overlay ARRIS Confidential & Proprietary 5

6 RFoG Architecture Comparison to HFC ARRIS Confidential and Proprietary 6

7 Traditional HFC compared to RFoG HFC System at 500 HHP Per Physical Node ~125 HHP Per Segment MHz/1 GHz Coax Segment Transmitter Receiver Node 5 MHz - 42 MHz

8 Traditional HFC compared to RFoG HFC System at 500 HHP Per Physical Node ~125 HHP Per Segment MHz/1 GHz Coax Segment Transmitter Receiver Node 5 MHz - 42 MHz RFoG System at 32 HHP Per Optical Segment 1 GHz Optical Amplifier Yellow devices are new 1550 nm RF STB DOCSIS CM/EMTA WDM Mux // Splitter RFoG CPE 1610 nm 5 MHz - 42 MHz ARRIS Confidential & Proprietary Still Fiber + Coax except fiber extends all the way to the home 32x Optical Splitter ~17 db loss both directions 1 32 HHP Use existing home wiring & CPE just like HFC 8

9 RFoG with Repeater Architecture 1550 nm // Splitter RFoG CPE 1610 nm or other 1 64 HHP 1550 nm 1 GHz HE WDM Mux OSP RFoG Repeater W D M W D M // Splitter RFoG CPE 1610 nm or other 1550 nm 1 64 HHP 5 MHz 42 MHz // Splitter RFoG CPE 1610 nm or other 1 64 HHP 1550 nm Field Repeater comparable to an HFC Node Benefits: -very long reach >60km -larger fan-out: 256 subscribers -reduces trunk fiber count -supports segmentation strategies // Splitter RFoG CPE 1610 nm or other 1 64 HHP ARRIS Confidential & Proprietary 9

10 RFoG ONU Reference Diagram R-ONU Downstream receiver 1550 nm W D M up nm Upstream transmitter Diplexer H L RF signals on coax into home End of fiber optic distribution plant Power control Signal detector Upstream Burst Control ARRIS Confidential & Proprietary 10

11 Illustrating Ideal CWDM/DWDM Profiles and Insertion Loss of 20 km of standard SMF Fiber (db) Illustrating Ideal CWDM/DWDM Profiles and Insertion Loss of 20 km of standard SMF Fiber Illustrating Ideal CWDM/DWDM Profiles and Insertion Loss of 20 km of standard SMF Fiber (db) (db) 11 Wavelengths ITU G.695 CWDM Wavelength Plan Traditional HFC Forward & Reverse RFoG RFoG Tx s Downstream Upstream Optical 1431 Wavelength (nm) Low Dispersion Optical Wavelength (nm) DWDM Optical Wavelength (nm) Water Peak

12 Downstream Transmission Downstream transmission must be in C-Band (1550 nm region) because optical amplification is necessary to overcome the splitter loss. - EDFA s function only in C-Band Splitter loss typically 17.5 db (32x) Transmission line losses db per 100ft for coax (need RF amplifier cascades!) db per km for fiber (typically NO amplifiers in the field) Footer 2 Footer 1 12

13 Upstream Transmission Upstream transmission must be burst mode to limit noise & prevent possible optical collisions Wavelength not critical, except 1610nm was chosen for compatibility with EPON/GPON service on same fiber. 1310nm is also possible and is often requested due to lower cost but prevents future EPON coexistence. Footer 2 Footer 1 13

14 Bandwidth Fiber bandwidth is many GHz so network bandwidth is limited only by the electronics attached to it. On the fiber, downstream and upstream are separate wavelengths - equivalent to independent transmission paths - symmetrical bandwidth (e.g. 1 GHz each direction) is possible on the fiber part, but is limited by 42/54 spectrum split on the in-home coax. This split is hardwired into the RFoG ONU. Other splits are possible, such as 85/105 MHz. Footer 2 Footer 1 14

15 Loss Budget - Downstream 1550 nm downstream optical transmitter Optical amplification and spitting as required How much headroom do you need?... W D M splitter or taps... R-ONU R-ONU RF on coax RF on coax nm upstream optical receiver Start of fiber optic distribution plant System specified distance (D) and loss budget (L) End of fiber optic distribution plant Optical Hub (start of FTTH system) Optical Distribution Network (ODN) Home dbm Launch Limited by SBS 5 db for 20km 17.5 db > -6 dbm req d ARRIS Confidential & Proprietary 15

16 Loss Budget - Upstream 1550 nm downstream optical transmitter Optical amplification and spitting as required How much headroom do you need?... W D M splitter or taps... R-ONU R-ONU RF on coax RF on coax nm upstream optical receiver Start of fiber optic distribution plant System specified distance (D) and loss budget (L) End of fiber optic distribution plant Optical Hub (start of FTTH system) Optical Distribution Network (ODN) Home > -26 dbm req d ~2 db db 3 dbm 7 Launch ARRIS Confidential & Proprietary 16

17 Loss Budget/Headroom Summary Downstream Upstream Launch Launch Approximate values, connector & splice losses not included Conclusions - Use highest possible downstream launch power - Upstream may be limiting if 1310nm is used instead of 1610nm Footer 2 Footer 1 17

18 RFoG Cost per Sub vs HHP ARRIS Confidential & Proprietary 18

19 Cost Dependencies Density homes passed per mile Penetration Aerial vs Underground Oversubscription policy Construction practice connectors or fusion splices ARRIS Confidential and Proprietary 19

20 RFoG End of Line Performance Launch Power Distance Split Rx Power CNR CTB CSO dbm km dbm db db db 18 dbm 20 km typical 18 dbm 20 km worst case The RFoG ONU is End-of-Line No RF Amplifier Cascade Essentially Node+0 Footer 2 Footer 1 20

21 Key Devices Footer 2 Footer 1 21

22 CHP Max5000 Headend Optics for RFoG CORWave II Transmitter CHP-GMOD Externally Modulated Transmitter dbm SBS CHP-EDFA Up to 8 Ports dbm SBS Multi l, low cost ARRIS Confidential and Proprietary 22

23 CORWave II Full Spectrum Multi Wavelength Forward Transmitters The latest addition to ARRIS s extensive line of CORWave multi wavelength transmitters 4 to 16 optimized DWDM wavelengths in the forward path on one fiber Supports MHz Reach 65 km 4l, 45km 8l Full Spectrum: single transmitter delivers broadcast and narrowcast RF signals for full spectrum on each l Ideal for segmentation 1 RU package integrated into the CHP management platform Integrated with CORView element management system ARRIS Confidential and Proprietary 23

24 Multiport Optical Amplifier Use 1 port per 32 HHP ARRIS Confidential and Proprietary 24

25 CHP Max5000 Enhanced Return Path Receiver Modules Input Power to -10 dbm - standard HFC Rx typically -12 dbm sensitivity Improved EIN performance (Equivalent Input Noise) - <1.5 pa/ Hz (85 MHz bandwidth) standard HFC typically 8 Increased gain over standard 2RRX (6dB) Front Panel RF Test Point Front Panel RF Gain Adjust - 0 to 31.5 db in 0.5 db steps Front Panel Visual Indicators - Module Status - RxA/RxB Status Squelch function - Reduces noise addition when combining multiple receivers to a CMTS upstream port - an RFoG specific benefit ARRIS Confidential & Proprietary 25

26 NPR (db) Benefit of Low Noise Receiver 45.0 RFoG Upstream NPR Performance: 23dB Link Budget 40.0 EIN: 8.0 EIN: QAM RFoG ONU RF Input Level (dbmv/6 MHz) 64 QAM reference has 6 db headroom above 27 db CNR / 10-6 BER ARRIS Confidential & Proprietary 26

27 NPR (db) Benefit of Low Noise Receiver 40.0 RFoG Upstream NPR Performance: 26dB Link Budget EIN: 8.0 EIN: QAM RFoG ONU RF Input Level (dbmv/6 MHz) 64 QAM reference has 6 db headroom above 27 db CNR / 10-6 BER ARRIS Confidential & Proprietary 27

28 NPR (db) Benefit of Low Noise Receiver 40.0 RFoG Upstream NPR Performance: 28dB Link Budget EIN: 8.0 EIN: QAM RFoG ONU RF Input Level (dbmv/6 MHz) 64 QAM reference has 6 db headroom above 27 db CNR / 10-6 BER ARRIS Confidential & Proprietary 28

29 RFoG Return Path Performance ARRIS Confidential and Proprietary 12/9/

30 FTTMax 1000 RFoG ONU Optical Input LED Indicator Return Transmitter Active LED DC Power LED Optical Output To PON ONU RF Output/Input Optical Input 12 VDC Input 30

31 RFoG ONU Key Features Best described as a mini node located at the subscriber location. Includes an optical multiplexer on the input to separate downstream and upstream wavelengths. Optical multiplexer upgrade port can also be used to pass through unused wavelengths. Downstream analog video receiver is utilized to convert optical signals to RF, provides a modest amount of gain and tilt compensation, and delivers those signals through a diplex filter to the coaxial network. Typical minimum input level is -6 dbm for acceptable CNR. Upstream signals from the CM, e-mta, STB, DSG, etc pass through the diplex filter to an upstream analog laser (FP, DFB, or CWDM). - Typical transmit level is +3 dbm. - Upstream supports burst mode detection. If RF signals are present, above a certain threshold in the upstream, the laser is turned on for transmission. If no RF signals are present (or are below defined threshold) the laser is turned off. Power typically provided via a 12VDC dedicated connection or through RF port. Hardened to operate over outside plant temperatures. ARRIS Confidential & Proprietary 31

32 FTTMax 1000 RFoG ONU (Optical Network Unit) Advanced, bi-directional, interactive RF services over an optical network. Optional optical l pass through port to connect EPON ONU for ultra-premium data services ± 6.5 nm optical downstream (with PON upgrade port), 0 to -6 dbm optical input Optical AGC maintains RF output levels over range of optical inputs 1 GHz RF bandwidth, 17dBmV RF Output level, 3dB operational tilt. 42/54 MHz Frequency Split, other splits available on request 1610nm CWDM Optical Upstream, +3dBm optical output. 1310nm FP/DFB laser upstream also available Gated RF return path to suppress noise from subscriber location SC/APC Optical Connectors, F style RF connectors 12VDC powering - Via dedicated F port or RF F port < 4 watts power consumption ARRIS Confidential & Proprietary 32

33 Trans Max Hardened Field Hub RFoG Extended Reach/Transition Node Supports RFoG architectures featuring limited trunk fiber or long distances. Leverages widely deployed OM4100 platform New, plug-in optical modules including: EDFA s Ultra Low Noise Return Path Receivers Optical passive modules Platform supports Segmentation multi-wavelength HFC + Gigabit EPON RFoG + Gigabit EPON RFoG Repeater Architectures feature Hardened EDFA Modules 8x Analog Return Receivers 2 channel Digital Return Optical Multiplexing Modules ARRIS Confidential & Proprietary 33

34 Compare to traditional HFC Node Node becomes a Multi-purpose outdoor platform QAM Overlay Architecture Support Multi-Wavelength Optical Architectures RFoG Repeater Gigabit EPON Repeater Available function modules - - EDFA Modules - Analog Return Receivers - Digital Return Transmitters - Optical Multiplexing Modules - DOCSIS Management 34 ARRIS Confidential and Proprietary 12/9/2010

35 RFoG Repeater TransMax TM4100 FIBER STUB #1 EDFA 23dBm 1X8 Splitter Quad Rx 8 Way Optical Passive Module 1611 nm 1550 nm 1611 nm 1550 nm 2:1 Digital Tx Return Config nm 1550 nm 1611 nm 1550 nm FIBER STUB #2 DOCSIS Transponder Quad Rx EMS RX 1611 nm 1550 nm 1611 nm 1550 nm 1611 nm 1550 nm 1611 nm 1550 nm ARRIS Confidential & Proprietary 35

36 Compatibility & Coexistence ARRIS Confidential and Proprietary 36

37 Gigabit EPON Architecture Optical Distribution Network (ODN) ~20 km (Typically 1:32 Customers) ODN ~10 km (Typically 1:64 Customers) ONU ONU Headend // 1550 nm Broadcast Video (if used) 1490 nm Data Traffic ONU ONU ONU ONU Routers OLT 1310 nm Data Traffic // // ONU ONU Splitters may be in one place or distributed Split ratio is function of optical budget for both RFoG and EPON // Optional Extender stretches reach Optical splitter (1x2, 1x4, 1x8, 1x16,or 1x32) ONU // ONU ONU ONU ARRIS Confidential & Proprietary 37

38 RFoG / HFC / EPON Coexistence EPON 10G Upstream nm 1G Upstream nm 1G Downstream nm PON RF Video Overlay 1550 nm 10G Downstream /+3 nm RFoG HFC Alternate RFoG Upstream 1310 HFC Downstream CORWave 4 ls ~1291 nm Note potential conflict (no conflict w/ 1610 RFoG Upstream) Wavelength nm Primary RFoG Upstream 1610 nm HFC Upstream => choice of 8 CWDM ls 1471 through 1610 nm -or- 4 ls within 1471 CWDM filter bandwidth 26

39 Together RFoG provides - Video in a native manner - DOCSIS VoIP EPON provides - Gigabit Symmetrical High Speed Data All with small headend footprint ARRIS Confidential & Proprietary 39

40 Standards ARRIS Confidential and Proprietary 40

41 SCTE Standards Standard is SP910 - SCTE Interface Practices Subcommittee Working Group 5 (IPS-WG5) - Intention to align fiber plant architecture with IEEE 802.3ah Gigabit EPON Separated into 2 phases in order to pass a Phase 1 basic system Phase 1 passed reconsideration ballot Completion of the standards process considered imminent ARRIS Confidential and Proprietary 41

42 Where does RFoG take us? Footer 2 Footer 1 42

43 Questions? Footer 2 Footer 1 43

44 Thank You (203)