Adaptive Routing Strategy in Multi Layer Satellite Communication Networks

The characteristics of multi-coverage of multilayer satellite networks make sure of good validity and reliability of the space-based networks. Walker delta type constellation guarantees permanent inter satellite links between satellites in the same layer and provides nonpermanent inter orbit links, both of which make an autonomic satellite backbone. As a integrated services network, multiplayer satellite network has the ability of fulfilling the QoS needs of different services, including narrow band services and wideband ones, and provides services of different priorities. Adaptive routing behaves better than other routings, because distribution of subscribers must be considered in this strategy. Statistic model describes more precisely the traffic flow from global perspective, and can be used to analysis the relationship of routing delay and number of ISL and average distance of information transmission in LEO and MEO layers. Multilayer satellite network has less total path weight and percent of lost packets.