bytes, , [GEN]. Document: ITU-T SG15 (Study Period ) Temporary Document GEN. Title: FTTH Handbook. Download as PDF, TXT or read online from Scribd .. FTTH Handbook 1 Introduction This handbook has been developed to provide an understanding of all the. [BLU 10] BLUETOOTH SIG I., , August [FTT 10b] FTTH, FTTH Handbook, Report, Fiber to the Home Council Europe,
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For the access of network technologies, there are normally two ways i. Fixed and the second is the Wireless way.
FTTH Quick Guide
Fiber to the Home or simply FTTH is a technology that uses optical fiber directly from the central point to the residential premises as shown in the following image. It provides uninterrupted high-speed internet service.
FTTH is the ultimate fiber access solution where each subscriber is connected to an optical fiber. The deployment options discussed in this tutorial are based on a complete optical fiber path from the Optical Line Termination OLT right to the subscriber premises. This choice facilitates high bandwidth services and content to each customer and ensures maximum bandwidth for future demands of new services.
Optical Fiber Method can be deployed in two ways: Active Method and Passive Method. The current mass FTTH deployment is based on the passive method. Refer the following image. Very high bit rate digital subscriber loop VDSL supports a maximum bit rate of 55 bps.
SHDSL stands for symmetric high bit rate digital subscriber line. The larger the diameter of the telephone, the longer the distance it could reach.
The transmission rate depends on the diameter of the telephone wire. Fiber offers a number of advantages over the previous technologies Copper.
FTTH – Quick Guide
The following table lists the advanced services that can be provided through FTTH along with their bandwidth. In GPON, the maximum differential fiber distance is 20 kms. Logical reach is defined as the maximum distance that can be covered for a particular transmission system, regardless of the optical budget.
The mean signal transfer delay is the average of the upstream and downstream delay values between reference points. This value is determined by measuring round-trip delay and then dividing by 2. GPON must accommodate services that require a maximum mean signal transfer delay of 1. Specifically, GPON system must have a maximum mean signal transfer delay time of less than1. PON 0210 may be either symmetrical or asymmetrical.
Physical reach is defined as the maximum physical distance that can be achieved for a particular transmission system.
In GPON, two options are defined for the physical reach: Service is defined as a network service required by the operators. Service is described by a name that is clearly recognized by everyone, regardless of whether it is a frame structure name or a hsndbook name.
GPON aims at transmission speeds greater than or equal to 1. The most important bit rate is 1. Vtth the split ratio is for GPON, the more economical it is from cost perspective.
FTTH Handbook – Fifth Edition – Gpondoctor
However, a larger split hanvbook implies greater optical power and bandwidth splitting, which creates the need for an increased power budget to support the physical reach. Split ratios of up to 1: However, anticipating the continued evolution of optical modules, the TC layer must consider handook ratios up fyth 1: Later on, the standard enhanced to cover Mbps.
Inthe FSAN group started the development of a gigabit speed standard, i. As shown in the above illustration, the ODN may be configured with one or multiple splitters with several cascades.
For this, it uses synchronized ctth at each end of the transmission line; resultantly, each signal appears on the line only a fraction of time in an alternating pattern. But, at the ONU, only the specific packet is processed, and the rest packets are discarded. It utilizes passive optical components. Besides, the fhth topology shown in the following illustration, PON can work in other topologies. For example — Bus or linear, distributed splitting, etc.
To break down the bandwidth hurdle of the access over twisted pair cables, it supports high-bandwidth transmission. The downstream transmission, i. PON system may be symmetrical or asymmetrical. PON and fiber infrastructure can also be used for supporting any one-way distributive service. For example — Video at a different wavelength. One of the basic requirements of an optical system is to provide components with sufficient capacity to extend the optical signal to the expected range.
There are three categories or classes of components, which are based on power and sensitivity. PON Core shell consists of two parts. In case, any one fiber out of these two fibers is cut the ONU can be accessed through other fiber.
Link protection is also known as link aggregationwhich can protect the link and the same time, it can aggregate the traffic as well. The optical network terminal ONTwhich is connected to 200 OLT at uplink side for service network interface, has many user-network interface 20100.
This combination of the two; together makes the ONT the most cost effective solution to provide GPON services to local and single-family, small, and medium nandbook. However, if a client on campus as students, hostels, schools, colleges, hospitals, or corporate offices, where there is already CAT-5 copper cable is laid, ONU can serve as a more appropriate solution.
The GPON ODN, consisting of a single mode optical fiber and cable; the optical fiber ribbon cables, splices, optical connectors, passive optical splitters and passive yandbook components are very passive. The ODN optical handbooi divide the single fiber into multiple fibers going to different buildings and individual homes. The splitters are designated as [n: It is the data transport scheme in the specified GPON transmission convergence layer. GEM provides a connection-oriented, variable-length framing mechanism for transport of data services over the passive optical network PON.
For downstream traffic ftthh, the traffic multiplexing functions are centralized in OLT. The traffic bearing entities within the ONU are granted upstream transmission opportunity or bandwidth allocation by the OLT. It is a recipient of upstream bandwidth allocations within the ONU. The bandwidth allocations to different Alloc-IDs are multiplexed in time as specified by fttth OLT in the bandwidth maps transmitted downstream.
It appears as a single entity for the purpose of upstream bandwidth assignment on the PON.
The downstream frame has a duration of microseconds and is bytes long, which corresponds to the downstream data rate of 2. In G-PON systems with the 1.
Each upstream frame contains a number of transmission bursts coming from one or more ONUs. Each upstream transmission burst contains an upstream physical layer overhead PLOu section and one or more bandwidth allocation intervals associated with the individual Alloc-IDs. The downstream GTC frame provides the common time reference for the PON and the common control signaling for the upstream. It has constant-size HEC-protected header. However, ftty avoids large overhead by allowing variable length frames.
GEM supports fragmentation and reassembly. GEM can fragment its payload. For example, Un-fragmented Ethernet frame as shown in the following ahndbook. Encryption blocks are aligned to the GTC frame. Constant length frames facilitate QoS for time-sensitive applications. It is usually located at the service provider, and the connected the DTE branches of the tree are called Optical Network Unit ONUlocated in the premises of the subscriber. The standardization process began when a new study group called Ethernet in the First Mile EFM was established in Novemberhaving as main objectives the study of Ethernet point-to-multipoint P2MP fiber with Ethernet copper.
Ethernet over point-to-point P2P fiber and over a network operating mechanism, Administration and Maintenance OAM to facilitate network operation and troubleshooting. A product by EFM Ethernet in the first mile. A PON fyth based on Ethernet. It simplifies system structure, decreases cost, and makes itself flexible to upgrade. Equipment venders focus on optimizing the function and practicability. Ethernet has proven over time to be the ideal transporter for IP traffic.
Accordingly, the IEEE EPON is currently a part of the Ethernet standard. Gbps, which is independent of the protocol, was not very popular within the IEEE Section five of IEEE It allows the exchange of IEEE However, the Ethernet point-to-point fiber offers the highest bandwidth at a reasonable handboook. Ethernet Point-to-multipoint fiber provides relatively high bandwidth at a lower cost.
The conclusion of the IEEE This standard allows service providers a variety of flexible and cost effective solutions for the provision of broadband Ethernet services in the access and the metro networks.
Any network topology defined in IEEE EFM technology allows different types of topologies to achieve maximum flexibility. These are defined by two wavelengths: It is the interface between PMD and the physical media. It describes the signals, the physical media, and the mechanical and electrical interfaces.