Abstract
The movable spot-beam antenna of satellite can adjust its pointing flexibly, so it can meet the on-demand coverage need for the ground area. On the other hand, the Ka band is more and more utilized in the satellite communication system with the increasing demand of multi-media data business from users. However, the Ka band is susceptible to rain attenuation. In this paper, a kind of movable spot-beam schedule algorithm for resisting rain attenuation in satellite networks (MSBSA-RRA) is proposed for the adverse effects of rain attenuation on the communication performance of Ka-band. MSBSA-RRA establishes the optimal model of spot-beam antenna scheduling by using the optimization theory. Two kinds of users are set up in this paper, which are special users and ordinary users. The priority for special users is higher and its service quality needs to be guaranteed underlying. The attenuation margin factor is introduced in the optimization model, so the spot-beam antenna can give priority to special users under rainfall conditions. The optimization model is solved by classifying the spot-beam scheduling problem as the maximum weight perfect matching problem of bipartite graph. The performance of MSBSA-RRA is simulated and analyzed in this paper. Simulation results show that MSBSA-RRA can effectively reduce the drop call rate in the rainfall condition. Meanwhile, the influence of the attenuation margin factor on the performance of special users and ordinary users is also analyzed in this paper. It can be seen from the simulation results that the value of attenuation has a very important influence on the performance of MSBSA-RRA.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (No. 61271281, No. 91438205) and Equipment Development Foundation of China (No. 9140A21010115HT05003).
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Wang, H. et al. (2017). A Movable Spot-Beam Scheduling Optimization Algorithm for Satellite Communication System with Resistance to Rain Attenuation. In: Yu, Q. (eds) Space Information Networks. SINC 2016. Communications in Computer and Information Science, vol 688. Springer, Singapore. https://doi.org/10.1007/978-981-10-4403-8_16
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DOI: https://doi.org/10.1007/978-981-10-4403-8_16
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