MileGate GPON GPON Platform for Applications
GPON Platform for Applications Content Infrastructure Advantages MileGate integrated GPON MileGate OLT Units MileGate ONT Units MileGate
Infrastructure
FTTH / FTTB Infrastructure Point to Point CO Point to Multi-Point (AON) Active Node CO Point to Multi-Point (PON) Passive Optical splitter CO Optical fiber Optical fiber
GPON Architecture ACCES NETWORK Optical Line Termination (OLT) Packet Network 16-128 Subscribers Passive optical splitter SUBSCRIBER Typically up to 20 km (28 db) Advantages Lower costs for investments in Infrastructure due to passive splitters Disadvantages 3,000 5,000 Subscribers BACKBONE Optical fibre architecture can be used with PON only Later decision towards Point-to-point Advantages leads to further investments Lower costs for investments in Infrastructure due to passive splitters
Advantages
GPON Advantages Shared infrastructure translates to lower cost per customer Minimal number of optical transceivers Feeder fiber and transceiver costs divided by n customers Passive splitters translate to lower cost Can be installed anywhere No power needed Essentially unlimited MTBF Fiber data-rates can be upgraded as technology improves now 1.25Gbps, 2.5Gbps soon 10Gbps 20 km reach in case of 28 db optical budget
GPON Advantages High performance despite shared medium DBA: Dynamic Bandwitdh Allocation Rate limiting as demanded from the customer product GPON Encapsulation (GEM) supports multiple data types simultaneously Ethernet: natively supported TDM: natively supported or through circuit emulation service (CES) over IP / Ethernet ATM: natively supported, but unfavorable, as operators convert to Ethernet-/IP-Netze ONT Management and Control Interface (OMCI) 93% bandwidth efficiency As per standard, up to 8 classes of service
MileGate-integrated GPON
FTTH Passive Optical Network with MileGate and SUGP1 SUBSCRIBER Up to 160 GPON Ports per 8 HU Subrack (5120 subscribers / 1:32 split) METRO/REGIONAL NETWORK TV IPTV S S U E E G P1 N N 3 3 C O G E4 METRO Node Core Network Ethernet Internet Telephony POTS WLAN ACCESS NETWORK
V P V P V P V P V P FTTB connections with SUGP1 and MileGate 2011 Core Network S U G P 1 C O G E4 10/40 Gbps n x VDSL2 V P GPON MileGate 2011 with GPON interface
MileGate OLT Units
MileGate Integrated GPON OLT Card SUGP1 - Introduction SUGP1 is optimal for Fiber-to-the-Home (FTTH) and Fiber-to-the- Building (FTTB) applications SUGP1 8-port GPON interfaces acc. to ITU-T G.984 each with 2488 Mbps downstream / 1244 Mbps upstream Up to 64 ONUs/ONTs per GPON port SUGP1 satisfies the high demands on operation in street cabinets SUGP1 can be installed in following MileGate subracks MileGate 2510 MileGate 2310 MileGate 2200 Can be installed in combination with all other MileGate units
MileGate Integrated GPON OLT Card SUGP1 Services supported: 1:1 double-tagged and single-tagged N:1 double-tagged and single-tagged with logon (via PPPoE/DHCP) IGMP / Multicast Service functionality close to SUE12 and SUV11 boards Single slot unit with 1GbE and 10GbE backplane interfaces to the Core Units Management via MCST and UNEM Broadcom GPON chip is used
MileGate 40G-Uplink Core Unit COGE4 COGE4 40 GbE / 10 GbE Netzwork-Interfaces 2 x optical 40GbE (QSFP) oder 10GbE (QSFP) 3 x optical GbE/10GbE (SFP/SFP) Management-Interface 1x electrical 10/100/1000 Mbps (RJ45) Synch I/Os (2MHz) Input for the reference clock Single-slot Unit for MileGate 2310 and MileGate 2510 1GbE and 10GbE Backplane-Interfaces 1:1 COGE4 Equipment Protection via 40G-Connection HW-ready for Synchronous Ethernet for all Ethernet-Frontports HW-ready for IEEE 1588v2 (PTP) for all Ethernet-Frontports (Use case mobile backhaul) Uplink MPLS-Support with later SW Upgrade
MileGate Integrated XG-GPON OLT Card SUGP2 Single slot unit for MileGate 2510 and 2310 4-port XG-GPON interfaces acc. to ITU-T G.987 Each with 10 Gbit/s downstream / 2.5 Gbit/s upstream or 10 Gbit/s downstream / 10 Gbit/s upstream Up to 128 ONUs/ONTs per XG-GPON port 10GbE backplane interface XG-GPON chip Broadcom or PMC-Sierra No commercial chipsets available yet
MileGate ONT Units
MileGate GPON ONTs Sample CPE Genexis Element G-1030 Live! Titanium Element G-1030 GbE Network Termination ONT 1 port GbE (RJ45, 10/100/1000 auto MDI/MDIx) According to ITU-T G.984 GPON (maximum 2,5 Gbit/s downstreams / 1,25 Gbit/s upstreams) Triple-Play Multi-Service: High-Speed Internet Voice IP Multicast TV Can be extended with Hybrid Live! Titanium Home Gateway Module (optional) 4x GbE, 2x FXS, WLAN IEEE 802.11b/g/n (2.4 GHz), 2x USB Variant with CATV interface (RF overlay) available (Genexis Element G-1034) Implementation according to BBF TR-142 issue 2 BBF certified
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GPON Technology
GPON ODN MDF Splitter OLT ODN Class A = 21 db B = 26 db B = 29 db C = 31 db Assumptions 0.5 db/km 0.5 db/connector 250 200 150 100 50 0 10 km 15 km 20 km Class A Class B Class B Class C
Optical Splitters Product Line Specifications 1 x 4 1 x 8 1 x 16 1x 32 1 x 64 Premium Grade Maximum Inseration Loss (db) 6.7 9.8 13.0 16.0 19.6 Uniformity (db) < 0.6 < 0.7 < 0.7 < 1.0 < 1.4 A Grade Maximum Inseration Loss (db) 7.0 10.0 13.2 16.2 19.8 Uniformity (db) < 0.6 < 0.8 < 1.0 < 1.2 < 1.5 General Operating Specifications Operating Wavelength (nm) 1250 1650 Maximum PDL(1) (db) < 0,15 < 0.2 < 0.25 Return Loss (db) > 55 Operating Temperature ( C) -40 to 85 Storage Temperature ( C) -40 to 85 (1) Measured at room temperature in 1310nm and 1550nm
Budget Calculation LB = PS - PO LB = Link Budget PS = Sensitivity PO = Output Power Example: GPON 1310nm Power: 0dbm Single-mode fiber Sensitivity: -23dbm } Link Budget: 23db
Typical Range Calculation R B = L B - SIL - 0.35 2 Assume: Optical loss = 0.35 db/km Connector Loss = 2dB Splitter Insertion Loss 1X32 = 17dB } Range Budget: ~11Km http://www.evertz.com/tools/optical-power-budget-calculator
Overview ONT Activation ONT Discovery OLT recognizes arrival of an ONT OLT discovers the Serial Number OLT assigns ONT_id to ONT ONU ID: between 0 253 for ONU (254 for broadcast) ONT Ranging OLT measures arrival phase OLT provides equalization delay ONT adjusts TX phase Services can be provisioned
ONT Ranging Upstream traffic is TDMA (time division multiple access) Were all ONUs equidistant, and were all to have a common clock then each would simply transmit in its assigned timeslot But otherwise the signals will overlap To eliminate overlap guard times left between timeslots each ONU transmits with the proper delay to avoid overlap delay computed during a ranging process
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