China's fiber-optic home in the power communication applications and development

Due to its advantages of large capacity, long distance and anti-electromagnetic interference, optical fiber communication is well adapted to the development of power communication today. In particular, optical fiber composite overhead ground wire (OPGW), combined with the high mechanical , high conductivity and good corrosion resistance of aluminum coated steel wire, effectively combines the overhead ground wire with the communication optical fiber and is therefore greatly affected by the power system industry The importance of, and gradually be promoted to use.

There are many types of fiber optic home architecture, there are two main types: one is the point-to-point topology, from the central office to each user with a fiber; the other is the use of point-to-multipoint topology of passive light Network (PON), with point-to-multipoint solutions that can significantly reduce the number of optical transceivers and fiber usage, and reduce the rack space required by the central office, with the cost advantage, has now become the mainstream.

Optical access equipment used in two main ways: one is deployed in the telecom operator's central office equipment, called Optical Line Terminal (OLT), the other is close to the client's equipment, called optical network unit (ONU). From the current development situation, fiber-optic home also involves a number of industries and categories, such as indoor fiber optic, engineering and application of the entire telecommunications industry and even the information industry are of strategic importance.

At present, in the optical fiber access field, the hot debate in the industry is that there are two technical solutions for passive optical networks: GPON and EPON. Simply put, the former multi-service support more powerful, more efficient transmission, suitable for all business operations era of high-end business customers and residential customers, but the cost is relatively high. EPON mainly for data transmission, the core advantage is the relatively low cost. At present, both technologies are commercially available in different application environments and can be described as unique. It is noteworthy that, no matter EPON or GPON, are in the 10G era. In the short term, 10G EPON has an advantage over 10G GPON, which is primarily a cost issue.

And many operators believe that the bandwidth is enough for the next few years. Therefore, the two PON hybrid era should also exist for some time. In fact, GPON and EPON are not much different from each other in the process of network construction and networking. They are just different technical choices of operators. At present, GPON's business capability is basically the same as that of EPON, and GPON can not do service access yet. In the future, in the 10G era, the two technologies are likely to converge. That is, the same hardware platform supports both 10G EPON and 10G GPON. Equipment manufacturers have begun to play down the difference between the two technologies.

Overall, in the absence of other epoch-making technologies, FTTH will be the ultimate goal of broadband access to telecom networks in the coming years or even decades. It will drive the development of a series of related industries and form a few One hundred billion or even one trillion yuan of market size. Therefore, FTTH is one of the core technology motivations for the telecommunications industry to maintain its sustainable development. It is also an important weapon for the telecommunications industry to promote social informatization.

Fiber Optic FTTH home is part of the plan. As the future backbone of the communication transmission system, the anti-interference and anti-electromagnetic properties of optical fiber cater to the future needs of large amount of human information and high precision, and the low price enables a wide range of optical fiber transmission media to be widely promoted .

However, relatively speaking, fiber to the home to achieve good popularity, there are many problems to be solved, such as transmitting and receiving side of the technology and hardware, as well as the speed of the transmission system can mention the speed of G bytes, but for Users, the large amount of information processing, need a better computer to deal with, therefore, the improvement of communication systems, but also to a certain extent, depend on the rapid development of computer technology.