《A real time algorithm for bandwidth and time-slot assignment for rain faded DVB-RCS systems》.pdf

SPACOMM 2012 : The Fourth International Conference on Advances in Satellite and Space Communications A Real Time Algorithm for Bandwidth and Time-slot Assignment for Rain Faded DVB-RCS Systems Mohamed Al-mosawi, Rinat Khusainov, Boris Gremont School of Engineering, University of Portsmouth Portsmouth, UK {mohamed.al-mosawi, rinat.khusainov, boris.gremont}@port.ac.uk Abstract—Broadband satellite communication networks, oper- we look into resource allocation for DVB-RCS return links. ating at Ka band and above, play a vital role in today’s world- The difference is that here we have to work with MF-TDMA wide telecommunication infrastructure. The problem, however, frames instead of TDMA. is that rain can be the most dominant impairment factor for radio propagation at these frequencies. This paper, addresses The main contributions of this paper are as follows: bandwidth and time-slot allocation problem for rain faded DVB- We formulate the task of bandwidth allocation under rainy RCS satellite networks. We formulate the task as a combinatorial conditions mathematically as a combinatorial optimiza- optimization problem and propose a novel algorithm for dynamic tion problem. bandwidth and time allocation, which works with CRA type of traffic. The algorithm is evaluated using a MATLAB simulation We propose a low-cost allocation algorithm to solve it. with historical rain data for the UK. The main objective of the algorithm is to achieve a better bandwidth