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Abstract Optical Ethernet technology is now two main Communications technology : Construction of Broadband Optical Ethernet technology is the mainstream of metro optical networking technologies. This article describes the advantages of optical Ethernet, optical Ethernet in MAN applications studied, the last show can build optical Ethernet operation problems to be solved. Optical Ethernet technology is now two main communication technology integration and development: the integration of optical networks and Ethernet. It brings together the advantages of Ethernet and optical networks, such as Ethernet applications in general, low cost, flexible networking, and management simple and reliable optical networks, high-capacity. Optical Ethernet for high-speed, large capacity to eliminate the existence of the LAN and WAN bandwidth bottleneck between, will be the future integration of voice, data and video of a single network structure. Construction of Broadband Optical Ethernet technology is the mainstream of metro optical networking technologies. 1, the proposed optical Ethernet Today, enterprises and operators seek to reduce costs and increase revenue: (1) of the enterprise, e-commerce environment, enterprises will be to meet customer demand and increase revenue opportunities. Businesses to contact customers through the network in real time, Cooperation Partners and suppliers. However, while demand for enterprise networks continue to increase, but investment in the network are not simultaneously increased. Enterprises would like to spend less money for more services to maximize cost savings of enterprises; (2) For operators, the current network is primarily to consider is how to support the existing business to maximize profits while . MAN of the access bandwidth bottleneck, the rate does not match, and multi-protocol conversion and other issues make it difficult for operators to provide business users demand access rate. Put forward the concept of optical Ethernet solve these problems, but also to broadband metropolitan area network brought a revolutionary change. MAN is based on the current SDH architecture. SDH was originally slow-oriented, circuit-switched voice services and designed to ensure good QoS performance of the circuit to provide 50ms protection switching time; drawback is that SDH equipment is expensive and not flexible enough for the data business, efficiency is low. The application of optical Ethernet is very common based on the current maturity of the technology of Ethernet technology, and network management and traffic engineering aspects of the functions were strengthened in order to meet the MAN on the data rate and distance requirements. When the construction of light metro Ethernet carriers, you can directly in the backbone layer provides Ethernet port, to achieve seamless connectivity with the LAN. 2, the advantage of optical Ethernet Ethernet technology is proposed in 1970 by Xerox Corporation, initially through the coaxial cable allows users to share the 10Mbit / s bandwidths. Later, Ethernet quickly developed to pass through the unshielded twisted pair, and use the switch to provide 10Mbit / s leased line connection. Today, switched Ethernet can be 100Mbit / s of dedicated bandwidth is delivered to the desktop, and soon will achieve gigabit (Gbit / s) to the user. For fast, cheap, easy to use, this "plug and play" technology has become more than 90% of enterprise local area network (LAN) standard technology. Whether special network or public network, can be applied to optical Ethernet. It can be configured for point to point, mesh or ring topology, can be used in LAN, MAN and WAN. Application of the advantages of optical Ethernet technology are: (1) lifted its bandwidth bottlenecks inherent optical Ethernet format and speed of transmission end-to-LAN services, do not perform the conversion, do not need lower rates, thus breaking the presence in the LAN and WAN gateway bandwidth bottleneck. (2) optical Ethernet technology, high reliability has been proven in the LAN over Ethernet robustness and in the MAN, WAN in the well-known advantages of optical fiber transmission combination, can provide levels of availability 5 9 . EthernetoverRPR (EoRPR) can ensure that catastrophic failure occurs 50ms protection switching time. (3) Once in safe and good fiber-optic Ethernet network, end-user Ethernet data frames to be packaged together to protect the transmission of data and operational data stream with other users isolation. (4) better scalability and bandwidth as traffic has increased, progress in Ethernet technology standards to a higher rate, but it also maintains compatibility with existing network infrastructure. (5) low price as the current Ethernet port in the enterprise and campus network have been widely used, its hardware cost is very low, very mature technology, which greatly reduces the operator's network construction costs. If the price of Gigabit Ethernet ports only ATM and SDH port 1 / 4, while the upcoming 10Gbit / s Ethernet port SDH port price of about 1 / 7. (6) network, the traditional telecommunications network and efficient use of complex multi-layer structure (such as IPoverATM, IPoverSONET and IPoverDWDM, etc.), the disadvantage of this architecture: on the one hand, ATM and SDH equipment is very expensive, increasing operator costs; on the other hand, when the data transfer between LAN and WAN, the need to Router Complex protocol conversion, it will increase the network overhead, lower transmission efficiency, and also brought delays and jitter. Optical Ethernet is the end of the Ethernet LAN and WAN data transmission between the need for protocol conversion, it can greatly improve the transmission efficiency. (7) Ethernet interoperability light is already defined common technology, which enables multi-vendor equipment in the LAN, MAN and WAN in interoperability will help end compatible. (8) Optical Ethernet bandwidth management can be implemented on a packet-level bandwidth management, without having to specify a particular port. Operators can assign different according to different business bandwidth, from 1 to 1000Mbit / s adjustable (to 1Mbit / s increments). Enterprise Ethernet port can be replaced with a single 10/100/1000Mbit/s E1 or E3 rate of multiple WAN connections. (9) new business opportunities for optical Ethernet can provide two types of important business: operators directly to end users and operators to provide services to other operators in the business. 3, Optical Ethernet in the MAN (1) MAN problems Now access means the user can choose to essentially all copper-based access methods, rates ranged from kbit / s and Mbit / s later, it has been unable to meet growing customer demand. In the individual user, the user has not only satisfied with a slow Internet We are high quality suppliers, our products such as China Mini Twinkling Laser , China Party Laser Lights for oversee buyer. To know more, please visits Laser Light Projector.
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