Air-space network distributed routing method based on Qos guarantee

The invention provides an air-space network distributed routing method based on Qos (Quality of Service) guarantee, wherein the method comprises the following steps that: large elliptical orbit satellites are divided into a series of time slices according to a period to obtain a connectivity relationship and propagation time delay among the large elliptical satellites of each time slice; the largeelliptical orbit satellites master the visibility and propagation delay from all air nodes of the whole network to the large elliptical orbit satellites; the large elliptical orbit satellites establish a corresponding network topological graph for each type of priority service; and the air nodes obtain the network topological graph of each priority service and calculates the most appropriate path, and when a certain priority service is reached, the large elliptical orbit satellites calculate the next hop node for the priority service by using the network topological graph corresponding to thepriority service and usin