RPF protocol applied in optical burst switching ring network based on WDM

The invention provides a RPF protocol used in OBS loop network based on WDM. With this protocol, the transmission wavelength has no collision conflict; the source node has no data transmission conflict as well as on middle node, and the target node also has no data receive conflict. Wherein, the Class1 business is real-time with small time delay, the Class2 business is not real-time business and needs to try best. In RPF protocol, it releases the RPF before completing data transmission, and the RPF catch is dependent on business type. This invention provides better service to the Class1 business with lower missing packet rate and smaller time delay.