The invention puts forward a
software defined networking-based air and space information network business forwarding method. Different types of businesses of an air and space information network are different in
service quality requirement for bandwidth, time
delay and
packet loss rates; a
software defined networking concept is introduced, a centralized
control mode is adopted, a control plane is separated from a data plane, and a business type-based tunnel control mechanism is built in a
core network of an air and space information
network topology; flow paths for different types of businesses are calculated in a plurality of tunnels according to reserved bandwidth, priority and tunnel business types Based on uploaded
message flow tuple matching information transmitted via a south interface, whether business are forwarded based on grouping or labels can be determined. Based on data plane node
stream state feedback information,
label paths are re-planned based on priority when network resources are not enough. The forwarding mechanism designed in the invention is flexible and takes a whole picture into consideration, and air and space information network businesses can be delivered efficiently.