Multi-beam satellite systems at Ka Band can provide broadband high capacity access to interactive multimedia services with a good compromise between complexity and cost. It is also well known that the traffic profile tends to be asymmetric from the user point of view, with dynamic behaviour increasing daily and higher levels of QoS being demanded.
For this reason, means to increase system efficiency in support of the demanding dynamic traffic conditions are a key aspect to increasing system competitiveness whilst keeping its quality. On the other hand, the DVB-S2 standard is recognized as providing adaptability to propagation conditions, supporting higher transmission efficiency and dedicating more resources (bandwidth and/or power) to the users able to use them.
In order to cope with this situation, the present project is intended to investigate a solution based on beam hopping techniques, consisting of the illumination of only a subset of the satellite beams through an appropriately designed beam illumination pattern.
The challenge is to satisfy as close as possible the beam traffic requests, maximizing revenues through provision of high capacity in those areas of the coverage region with high demand, and minimizing the amount of resources dedicated to low loaded regions.
As such, the focus of this activity is to fulfil the following objectives:
Expected Main Benefits
The beam hopping techniques provide the system with greater flexibility in accommodating irregular and time variant traffic requests across the coverage region. To cope with high system efficiency, operators agree in indicating flexibility as the key requirement for a satellite system targeting interactive service provision, as it allows for sustaining the inherent large uncertainty in the broadband communication market evolution.
Indra EspacioDLRMDAUniversitat Autonòma de Barcelona