Understanding GPON By Adnan Umar

Objectives At the end of this module participants will be able to: List the benefits of FTTH Understand the PON Understand the GPON architecture Describe the key features of GPON

Copper Based Access Networks Optimized for a single service Can support data rates 20+Mbps Future demand for next generation services is 40+Mbps

Source:

Think of a technology --- having Unlimited bandwidth Future proof Long distance coverage Can support bandwidth hungry multimedia services over IP i.e. VOIP, HDTV, VOD, access to HSI etc. involving (voice + video + data) All services via bundle offering

FTTH 100 % fiber in AN

FTTH? Old networks, optimized for voice 24 kbps - 1.5 Mbps Copper Fiber // CO/HE CO/HE // Old networks, optimized for voice 24 kbps - 1.5 Mbps 19 Mbps - 1 Gbps + Optical networks, optimized for voice, video and data CO/HE //

“An OAN in which the ONU is on or within the customer’s premise.” FTTH – 100% Fiber Network “An OAN in which the ONU is on or within the customer’s premise.” OAN: Optical Access Network ONU: Optical Network Unit (CPE) OLT: Optical Line Termination CO/HE // ONU OLT OAN Source: www.ftthcouncil.org

FTTH Active Network OLT // ONU // // Processing (powered)

FTTH Passive Optical Network OLT // // // // // // Optical splitter 1x16 (1x2, 1x8) 1x32 (1x4, 1x8)

Hybrid Networks Processing (powered) OLT // // Optical splitter

FTTH network realizations Active networks Subscribers have a dedicated fiber optic strand May use active (powered) nodes to manage signal distribution All passive network Shares fiber optic strands for a portion of the networks distribution Uses optical splitters to separate and aggregate the signal Power required only at the ends Hybrid networks Literal combination of an Active and a PON architecture

FTTH Standards

FTTH - STANDARDS ITU-T G.983 APON (ATM Passive Optical Network). First Passive optical network standard. Used primarily for business applications was based on ATM (Asynchronous Transfer Mode) Initial offering 155.52 Mbps Downstream, 155.52 Mbps upstream. BPON (Broadband PON) Standard based on APON architecture. It adds support for WDM, dynamic and higher upstream bandwidth allocation.

FTTH – STANDARDS -cont ITU-T G.984 GPON (Gigabit PON) An evolution of the BPON standard. Supports higher rates, Enhanced security, GPON uses IP-based protocols to transfer data.

FTTH – STANDARDS-cont IEEE 802.3ah - 1.25 Gbps Symmetrical. EPON or GEPON (Ethernet PON) is an IEEE/EFM standard for using Ethernet for packet data. There are currently over 15 million installed EPON ports. EPON uses IP-based protocol to transfer data. - 1.25 Gbps Symmetrical.