Radzik, José and Vidal, Oriol and Pradas, David and Bousquet, Michel and Vazquez Castro, Maria Angeles Performance of Hybrid Satellite-WiMAX networks based on DVB-S2/RCS satellite systems for rural and remote areas. (2009) In: ICSSC : 27th AIAA International Communications Satellite Conference, 01-04 June 2009, Edinburgh, United Kingdom.
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Internet services can be efficiently provided in rural areas using hybrid architectures for the access network. Our proposal relies on WiMAX technology for last mile access and satellite backhauling for Internet connectivity. The satellite link uses ETSI standardized air interface: DVB-S2 on the forward link, DVB-RCS on the return link. The application scenario is dedicated to communications in the Amazonian region where many villages are scattered along the Amazon river. The satellite uses Ku or Ka band frequencies. The paper addresses the design problems raised by this difficult propagation/topographical environment. As deep fades can be experienced, Fade Mitigation Techniques are activated. We describe the way physical and access layers are impacted by FMTs. Then cross-layer mechanisms are introduced to adapt network upper layers behavior to the capacity changes on the satellite link. The control load mechanisms are illustrated on the basis of the VoIP service. VoIP codec rate on user side is controlled by the Network Control Center in order to match the satellite link capacity drops due to physical layer adaptation to channel conditions. Realistic modeling is considered for both the hybrid architecture and the satellite channel.
|Item Type:||Conference or Workshop Item (Paper)|
|Audience (conference):||International conference proceedings|
|Institution:|| Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE|
Other partners > Universitat Autònoma de Barcelona - UAB (SPAIN)
Département d'Electronique, Optronique et Signal - DEOS (Toulouse, France) - Signal, Communication, Antenne et Navigation - SCAN
|Deposited By:||José Radzik|
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