Proposal of optical Ethernet

May 17, 2021

Optical Ethernet technology is the integration and development of two mainstream communication technologies: the integration of optical network and Ethernet. It concentrates the advantages of Ethernet and optical networks, such as universal Ethernet applications, low prices, flexible networking, simple management, high reliability and large capacity of optical networks. The high speed and large capacity of optical Ethernet eliminate the bandwidth bottleneck existing between the local area network and the wide area network, and will become a single network structure that integrates voice, data and video in the future. Optical Ethernet technology is one of the mainstream technologies for building broadband metropolitan area optical networks.

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Nowadays, enterprises and operators want to reduce costs and increase revenue: (1) For enterprises, the e-commerce environment has brought opportunities for enterprises to meet customer needs and increase revenue. Enterprises can contact customers, partners and suppliers in real time through the network. However, although the demand of enterprises for the network is constantly increasing, the investment in the network has not increased synchronously. Enterprises want to spend less money to get more services, in order to maximize the cost savings of enterprises; (2) For operators, the current network construction mainly considers how to support the existing business while obtaining maximum profits. Problems such as access bandwidth bottlenecks, rate mismatches, and multi-protocol conversion of metropolitan area networks make it difficult for operators to provide the access rates required by enterprise users.

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The proposal of the concept of optical Ethernet solves the above-mentioned problems, and at the same time brings revolutionary changes to the construction of broadband metropolitan area networks. The current metropolitan area network is based on the SDH architecture. SDH was originally designed for low-speed, circuit-switched voice services, which guarantees good QoS performance and provides 50 ms of circuit protection switching time; the disadvantage is that SDH equipment is expensive, and it is not flexible and efficient when used for data services. Optical Ethernet is based on the currently widely used and mature Ethernet technology, and strengthens the functions of network management and traffic engineering to meet the data rate and transmission distance requirements of the metropolitan area network. After the operator constructs the optical metropolitan area Ethernet, it can directly provide an Ethernet port at the backbone layer to achieve a seamless connection with the local area network.

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