Abstract
To improve the efficiency of on-board resources utilization, two joint power and bandwidth allocation schemes are proposed to optimize power and timeslot allocation for beam-hopping user downlinks of the smart gateway system. By decomposing the two-variable optimization problem into two single variable optimization problems, the joint optimization problem is solved effectively. Moreover, two novel algorithms are proposed to solve the two subproblems. Extensive simulation results demonstrate that the efficiency of resource utilization can be effectively improved with the joint power and bandwidth allocation schemes in contrast with conventional allocation scheme.
Highlights
To solve the problems that different space systems cooperate inconveniently due to being built separately, the space information network (SIN) is proposed
We propose two joint power and bandwidth allocation schemes based on the inter-cluster orthogonal frequency reuse, which consider channel conditions and the traffic demands of user beams
To mitigate the co-channel interference, new constraints are introduced to avoid the case that adjacent beams in different clusters work simultaneously in designing beam hopping pattern, which increases the complexity of timeslot allocation
Summary
To solve the problems that different space systems cooperate inconveniently due to being built separately, the space information network (SIN) is proposed. To utilize the bandwidth resources efficiently, three resource allocation schemes are proposed in Kyrgiazos et al.,[7] which consider the feeder uplink conditions and the traffic demands of user beams. All these schemes only consider the optimization of bandwidth resources, whereas the power resources are allocated uniformly among the user beams, the efficiency of power utilization is not improved effectively.
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