Datacast transmission architecture for DVB-S2 systems in railway scenarios

In this paper we address datacast transmission over the second generation digital video broadcasting via satellite (DVB-S2). In particular, two novel cross-layer architectures are proposed and justified for a railway scenario that allow unicast services in addition to broadcast and multicast services. The architectures allow for quality of service (QoS) provision via cross-layer adaptation of the packet-level codes in use. The architectures can implement the two different link layer encapsulation protocols already available in the DVB family of standards: multiple protocol encapsulation (MPE) and generic stream encapsulation (GSE).