Datacast transmission architecture for DVB-S2 systems in railway scenarios

• Type: Article in International Conference Proceedings Book
• Date: 2008

Authors

Fausto Vieira (Author) FEUP; Vazquez Castro, M.Angeles (Author) Other; Jiang Lei (Author) Other

Conference proceedings International

Title: SPSC 2008

Pages: 1-5

Signal Processing for Space Communications, 2008. SPSC 2008. 10th International Workshop on

Rhodes, Greece, 6 a 8 de Outubro de 2008

Indexing

INSPEC

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

CORDIS: Technological sciences > Technology > Space technology > Satellite technology ; Technological sciences > Technology > Communication technology > Satellite-based mobile technology ; Technological sciences > Technology > Transport technology > Railway transport technology

Other information

Abstract (EN): Transmitting variable-length network layer (IP) packets over satellite links with fixed frame lengths (or lengths depending on the ACM transmission mode) requires (IP) encapsulation. For DVB-S links with fixed-size 188-byte TS packets, MPE and ULE encapsulations are available. DVB-S2 provides a compatibility mode to pack TS packets into the longer base band frames (BBFrames). Thus MPE and ULE are also available for S2, as well as a native generic stream encapsulation (GSE), avoiding the double overhead of TS and BBFrame encapsulation. The present paper gives a short overview on the available encapsulation protocols for DVB-S2, and then provides a mathematical efficiency calculation model for these encapsulations, in order to allow for performing theoretical efficiency simulations. Comparison graphs of the efficiency values are presented, using both the efficiency models and measurements from real satellite traffic.

Language: Portuguese

Type (Professor's evaluation): Scientific