Multimedia LEO satellite networks will play an important role in providing truly global coverage required by mobile personal communication services. Due to the high mobility inherent to LEO systems, a number of challenging technical problems arise. The first contribution of this work is to propose a realistic mobility model, taking into account the rotation of the Earth, which was systematically ignored in the literature. Our second contribution is a novel resource reservation strategy, termed sequential probabilistic resource reservation (SPR), specifically designed to minimize connection interruption due to handoffs. Finally, we propose a novel connection admission control (CAC) algorithm, differentiating real-time and non-real-time services. Performance results obtained by simulation show that the novel mobility model is essential for a realistic network performance evaluation and that the novel SPR strategy offers low handoff blocking probability for both service classes and low new call blocking probability for non-real-time connections.
['Hoang Nam Nguyen', 'Stephan Olariu', 'Petia Todorova']
A novel mobility model and resource reservation strategy for multimedia LEO satellite networks