Fiber To The Home: GPON Overview

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Presentation transcript:

Fiber To The Home: GPON Overview

Technology Glossary BPON: Broadband PON, expanded version of APON, supports robust video services: ATM based G683 EPON: Ethernet PON, using Ethernet for packet data - standards still unsettled: Ethernet based IEEE 802.3ah GPON: Gigabit PON using GEM: GPON Encapsulation Method GFP/ATM based G684 WDM PON: One wavelength per subscriber up to 10GigE FSAN: Full Service Access Network (FTTX) FTTB/C/Cab/H : Fiber-to-the Business/Curb/Cabinet/Home RfoG : radiofrequency over glass (instead of using coax). CATV: Cable Television or Community Access TV SMATV: satellite Master Antenna Television OLT: Optical Line Terminal ONT: Optical Network Terminator ONU: Optical Network Unit

FTTX services - Triple play Complete Voice Services Local/Long Distance Telephony features Internet based messaging (whatsapp, etc....) Basic & Advanced Data Services Broadband data Data/video convergence Home / SOHO networking Basic & Advanced Video Services Broadcast and premium channels directly from satellite or aerial (SMATV RFOG overlay) Pay Per View/Video on Demand(IPTV base) High Definition TV(IPTV or RFOG overlay) Web TV

Emergent technologies Access Yesterday: 3-5Mb/s (Internet / 1 SD) In 18-36 months: >30Mb/s (Internet + 2HD + PVR) Competitive Market offering: MDU MDU internal distribution Network using VDSL2 Point-to-point FTTP Gig E connection 30-100Mb/s to the subscribers Media converter “Today & Future” Point-to-point FTTx Gig E connection Copper or Coax 15-40Mb/s to the subscribers ADSL “Yesterday” 3-5 Mb/s to the subscribers

Different penetration of GPON

GPON Typical Topologies: One and Cascaded Splitters Connector or splice

No power required at nodes Active Ethernet Switching F1 F2 Ethernet Switch P2p or Ethernet over fiber GPON PON (Passive) Optical RFOG Transmitters IPTV RF

Complete PON Architecture RFOG optical transmitter EDFA (Erbium Doped Fiber Amplifier) (EDFA is not necessary within small plants) Video 1550 nm Voice & Data Voice/Data & Video OLT (Optical Line Terminal) Downstream 1490 nm 1490nm/1310nm, 1550nm Optical Couplers (WDM) ONT (Optical Network Terminal) Upstream 1310 nm 1x32 Or Cascade Optical Splitter 1310 nm 1490 nm Downstream Upstream Voice and Data >100Mbps 1550 nm Video >100 Mbps Bandwidths & Services Digital TV (Analog TV) SATELLITE IF 800 MHz 2350MHz 47 MHz

How is a ONT/ONU made? ONT Data Services Tv services (Optical Network Terminal) integrating WDM to divide data services from TV services Typical gpon ONU at customer WALLFIT customer socket Data Services Tv services Upstream Downstream Downstream 1310 nm 1490 nm 1550 nm Voice and Data >100Mbps Voice and Data >100Mbps Video Digital TV (Analog TV) SATELLITE IF 800 MHz 2350MHz 47 MHz

FTTX challenges FTTX: Analog signals need high power ORL and reflectances are critical Consider to dismit analogs TV overlay at 1550nm Distributing DTT and Satellite signals with best quality Releasing band for data services Short distances No need for EDFA amplifier! An optical TX serving up to 32 users Splitters in the field Well defined network, with 1:16 or 1:32 splitters Different wavelengths 1490nm (WWDM) Most common WL used (1310-1490-1550nm)