Advances in Random Access Protocols for Satellite Communications

Gianluigi Liva (German Aerospace Center)

Abstract:
This talk provides a survey of recent developments in the area of random access protocols, with emphasis on satellite communications. A class of modern random access protocols (coded slotted Aloha) for collision channels is presented, showing how the theory of codes on graphs can be applied to analyze the performance. The limitations coming from the adoption of a collision model are briefly discussed. An example of a modified coded Aloha protocol, capable of improving the efficiency over actual (satellite) wireless links, is finally illustrated.