波长交换光网络中路由波长分配技术

路由波长分配问题是在给定连接的情况下,为该请求分配适当的光路进行传输。在无波长转换能力的情况下,需要为光路在其传输的链路上分配相同的波长,这就是波长连续性问题。物理层的光损伤极大的限制了光网络的能力,因此需要可感知损伤的路由波长分配算法来保证传输的质量。对于不同的感知损伤的路由波长分配方式,相应地,有不同的控制平面结构。

Routing and Wavelength Assignment in Wavelength Switched Optical Network

In wavelength-switched networks, in the absence of wavelength converters each lightpath must be assigned the same wavelength on all the links it traverses. Such is known as the wavelength-continuity constraint. Given a set of connections, to set up lightpaths to accommodate the given traffic demand is called the Routing and Wave- length Assignment Problem. Physical-layer degra- dations can severely limit the capacity of optical networks, so routing and wavelength assignment algorithms are needed to minimize the effects. For different architectural approaches to impairment aware routing and wavelength assignment, there are some relative control plane architectures.