OBS中基于分割和波长转换的冲突解决机制

The contention resolution mechanism based on burst segmentation and wavelength convertion in OBS networks

提出了一种"先分割后波长转换"的冲突解决机制。当冲突发生时,首先对低优先级突发包进行分割;不冲突部分直接在事先预留的输出数据信道上处理,冲突部分通过WC转换到空闲的波长信道上。仿真结果表明,高优先级突发包的丢失率比低优先级的要低,并且各优先级突发包的丢失率随核心节点WC转换度的增加而降低。

A contention resolution mechanism is proposed. The idea of the mechanism is first segmented and then wavelength converted. When a collision occurs, the low priority burst is first segmented. The collision free parts are handled directly in the reserved output data channel. The collision parts are converted to free wavelength channel by the wavelength converter. The result of the simulation shows that the burst loss proba- bility of the high priority is much lower than that of the low priority ones, and the burst loss probability of dif- ferent priority decrease with increasing the conversion caoacitv of the core node wavelength converter.