Toward Optimal Selective Beam Allocation with Guaranteed Fairness for Multibeam Satellite Systems

With the increasing of traffic demand in satellite systems, it is essential to maximize the efficiency of resource utilization due to the expense and scarcity of on-board resources. In this paper, we propose a selective beam allocation algorithm with guaranteed fairness for multibeam satellite systems. The algorithm can achieve an acceptable trade-off between the maximum total capacity and the fairness among the spot-beams by allocating the basic power and bandwidth for low priority beams. In addition, the resources allocated for low priority beams can be adjusted flexibly by introducing a lower bound of the capacity. Extensive simulations evaluate the performance of the proposed algorithm. The results demonstrate that the total capacity of the proposed algorithm is 99% of water-filling algorithm. Furthermore, comparing with common selective beam allocation algorithm, the Jain Fairness index is improved by 20%.