Design concepts for packet networks with auxiliary satellite channels

It is pointed out that the complementary characteristics of terrestrial networks and satellite packet systems provide the basis for new design concepts. Satellite packet transmission channels typically can provide more economical and higher capacity transmission than terrestrial channels, while imposing significantly larger propagation delays. The present investigation has the objective to explore some concepts for the synergistic use of both satellite and terrestrial channels in a packet network. The concept of packet networks with satellite overflow channels is extended to address mixed-media design concepts. A unified model is used to compare performance and identify basic design factors affecting performance. It is demonstrated that the key element in minimizing satellite channel delay is selecting a protocol which requires a minimum number of satellite channel transmissions for packet delivery.