The invention discloses a
route exchange method suitable for a GEO / LEO double layered
constellation network. According to the method, a
system period is divided into equal-
duration time sections based on a dynamic boundary value; a GEO layer
satellite high in on-board
processing capacity is used for calculating the best
route and the second best
route for each LEO
satellite; in the processes of
information transmission and exchange, when loads of the LED satellites are large, the GEO
satellite shares part of low priority services in time for the LED satellites, and it is guaranteed that important information is reliably transmitted in real time; when link congestion, node ineffectiveness and other emergency conditions happen in the
satellite network, in order to avoid rerouting of the whole network, and the GEO satellite only calculates rerouting for affected routes; after link congestion is eliminated, the LED satellites recover route information in time before congestion in order to avoid link resource waste in the network. In the network that topology time varying happens, links are prone to congestion, on-board resources are limited, continuous high-load flows are prone to being generated, and nodes are prone to being ineffective at the
special period, the method can reduce
constellation system cost, shorten convergence time, save the on-board resources, increase the
utilization rate of the link resources, guarantee that important information is reliably transmitted in real time and improve invulnerability and robustness of the
satellite network.