可变带宽光网络：提出、优势和关键技术

新型互联网业务迅速发展。使网络流量急剧增长，推动了对光通信容量的需求。同时，新型的互联网应用对带宽的需求具有不可预测性。这两方面因素驱动光网络朝着灵活、动态、高效的方向发展。可变带宽光网络可以在收发端根据传输距离、链路质量、业务需求动态调整传输速率、调制格式以匹配网络实际需求，提高了网络灵活性和网络生存性。可变带宽光网络关键技术包括可变带宽可重构光分插复用器、可变带宽收发机技术、可变带宽的电层技术和可变带宽管控层技术。

Variable Bandwidth Optical Network： Beginning,Advantages and Key technologies

New Internet business developed rapidly, make the network traffic increase sharply, driving the demand for optical communication capacity. At the same time, New Internet applications demand for bandwidth is unpredictability. These two factors drive optical network development in the direction of flexible, dynamic and efficient. Variable bandwidth optical networks can be according to the transmission distance, link quality and business demand dynamically to adjust the transmission rate, modulation format to match the network actual demand, improve the flexibility and network survivability. Key technologies of variable bandwidth optical networks include variable bandwidth reconfigurable optical add/drop multiplexer, variable bandwidth transceiver technology, variable bandwidth electric layer technologies and variable bandwidth control layer technologies.