近年来 ,一方面 ,互联网业务量以每年翻两番的增长速率以“井喷”式增长 ,并将成为网络中的主导部分和电信业务供应商的主要收入来源。另一方面 ,光层联网技术的不断成熟使直接在 WDM层处理光信号、建立和动态分配光通道以及执行快速恢复与保护成为可能。新技术的不断开发和使用使得构建新一代光通信网成为可能。 In recent years, on the one hand, the volume of Internet traffic has grown at a “quadruplicate” rate of growth at an annual rate of quadrupling and will become the major source of revenue for the leading segments of the network and telecom service providers. On the other hand, the continued maturity of optical networking technology makes it possible to process optical signals directly at the WDM layer, establish and dynamically allocate optical channels and perform fast recovery and protection. The constant development and use of new technologies make it possible to build a new generation of optical communications networks.