DESIGN AND IMPLEMENTATION OF FTTH NETWORK BASED ON GPON TECHNOLOGY

Fiber to the Home provides best transmission possibilities to conventional wired or wireless techniques. It offers advantages such as high bandwidth, immunity against interference, low cost & flexible designs, makes the telecom operators to choose FTTX networks. FTTH based on GPON technology is the most efficient method for FTTH implementation since it provides triple play, high splitting ratio, low CAPEX (Capital expenditure) and OPEX (Operational expenditure) , high speed transmission and so on. This design proves the allocation of maximum number of users for a multi dwelling buildings with tolerable power budget and cost. This design is also capable to incorporate future services like IPTV and provides dynamic allocation of bandwidth (DAB) according to the user requirements. INAS EMS software is used to show the active ports, diagnose the issues by fire alarm settings, physical / logical topological configuration support etc. after the network implementation. Keywords—Fiber to the Home (FTTH), Passive optical network (PON) , Optical network terminal (ONT), Optical line terminal (OLT), Gigabit Passive optical network (GPON). 1. INTRO DUCTIO N The requirement such as high bandwidth and capacity, high speed internet, HDTV, VoIP causes the thought for FTTX access networks. FTTH based on GPON technology is one of the techniques which can provide triple play services at a reasonable cost. It uses only passive equipment’s except at central office (CO) and at the customer premises. Now most of the telecom operators uses FTTH network based on GPON due to its flexibilities in handling extended technologies and services in future. For a GPON technology maximum of 128 uses can be included in a network with maximum reachability of 60 km and maximum distance between concecutive ONTs of 20 km as per G.984.6 ITU-T specification [8]. It uses tree topology to maximize the coverage with minimum network splits thus reducing optical power [7]. GPON uses 2.44 Gbps downstream with AES encryption and 1.24 Gbps upstream data transmission. Broadcasting or continuous transmission for downstream and TDM technique for upstream are used as transmission method. In this paper, the validation of proposed design is done on the basis of power budget and cost. The results shows that the received power levels falls within tolerable power budget and the consumed cost is low compared to other networks. INAS EMS software is used to check the connectivity’s , active ports location diagonisation of ONTs etc. The different profile configurations like ONU profile, VoIP profile ,DBA (Dynamic Bandwidth Allocation) profile are also done to have different services. This paper includes different sections like Components of GPON network, design, Implementation, testing results, and finally the conclusion. 2. COMPONENTS OF GPON FTTH NETWORK A Passive Optical Network (PON) is capable of having P2M (point to multipoint) network with passive components like optical splitter or coupler along the transmission section. It uses active components only at CO and at customer premises. It uses WDM to mix up video signals with the data and voice from OLT. The Figure.1 shows the basic FTTH Network. ISSN: 2347-971X (online) International Journal of Innovations in Scientific and ISSN: 2347-9728(print) Engineering Research (IJISER) www.ijiser.com 210 Vol 4 Issue 11 Nov 2017/101 Figure 1: FTTH Network [7] 2.1 Optical Line Terminal (OLT) It is the most important part of the network, where the electrical signal from the service provider’s equipment are converted into optical signals and given to the feeder network. The mode of transmission from ONT is broadcasting [8] from where it sends GEM frames through the GEM port with GEM port IDs It is capable of having Multi-service chassis for FTTx deployments, Supports a variety of service types, Non-blocking architecture with & Routing within distributed architecture, scalability and line rate performance, Full electrical and optical redundancy Outstanding scalability and line rate performance, Real-time network traffic monitoring and analysis .V8240 GPON OLT is used. Specifications are given in the table 1. Table 1: V8240 GPON OLT Specifications. 2.2 Optical Network Terminal (ONT) It is an active component used at customer premises which converts optical to electrical signals. ONU/ONT represents the single customer where they will get the triple play application. H640 series GPON ONT are used. It is capable of having carrier class VoIP telephony supporting both MGCP and SIP protocols, Flexible VLAN tagging support, QoS for traffic prioritization and bandwidth management, IGMP support for IPTV applications. Its specifications are given in table 2. Table 2: H640 Series GPON ONT 2.3 Splitter Splitters are used to physically split the fiber to number of fibers; to couple same or different information’s to N users. MxN planar splitters are used which is based on planar light wave circuit (PLC) technology and high precision alignment. MxN splitters can split or combine light from one or two fibers into N outgoing fibers uniformly over a wide spectral range with ultra-low insertion loss and low polarization dependent loss. With upto 64 output ports, these splitters are ideal for high density split applications like Fiber To The Home (FTTH) networks, FTTx Deployments Optical CATV Networks, CWDM and DWDM Systems, Passive Flash Memory 72 MB SDRAM 1 GB Dimensions (W x H x D) 17.1 x 12.2 x 11.2 in (434 x 310 x 285 mm) Switching Capacity 296Gbps Power Voltage AC type 100-240VAC, 50/60Hz DC type -48/60VDC Operating Temp 32 to 122°F (0 to 50°C) SIU (Subscriber Interface Unit) 10 slots NIU (Network Interface Unit) 2 slots SFU (Switching Fabric Unit) 2 slots Service Interface 4 10/100Base-TX ports (RJ45) 2 POTS ports (RJ11) 1 RF video port (F-connector) Uplink Interface 1 GPON port (SC/APC type) Operatin g Temp 32 to 104°F (0 to 40°C) Storage Temp -4 to 140°F (-20 to 60°C)