An Improved Dynamic Bandwidth Allocation Scheme Based on Traffic Prediction for DVB-RCS Systems

Recently, IP satellite networks are gaining a considerable interest to deliver high bandwidth services to nation-wide areas. Satellite bandwidth is a very valuable resource, hence it must be carefully shared among users. Moreover, IP traffic is inherently a bursty traffic, hence a dynamic allocation is needed. However, some difficulties still exist to implement such a method on geostationary satellite networks, since allocation delays have a negative impact on Quality of Service provisioning. The main problem arises from the high delay between the traffic start and the actual bandwidth allocation. To overcome this problem, a prediction of the resource needs has to be considered. The proposed technique takes advantage of a proper statistical traffic modeling to make a prediction of the needed bandwidth. Moreover, requests take into account the DiffServ traffic class in order to maintain a QoS priority among different users.