Optical Burst Switching (OBS), which combines the merits of wavelength routing and optical packet switching while avoiding their defects, is focused on as a new data transmission and switching scheme to realize IP over WDM.

• 光突发交换结合了光电路交换和光分组交换两种交换技术的优点同时克服其缺点,是一种实现IP over WDM全光互联网的最有竞争力的交换技术。 但由于目前没有成熟的光缓存器件,在光域不能对突发进行随机存储,而FDL只能提供有限的时延。