Subgrouping‐based multicast transmission over high‐throughput satellite systems with beam cooperation,International Journal of Satellite Communications and Networking

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Subgrouping‐based multicast transmission over high‐throughput satellite systems with beam cooperation
International Journal of Satellite Communications and Networking ( IF 0.9 ) Pub Date : 2020-04-27 , DOI: 10.1002/sat.1347
Shuo Zhang ₁ , Mingchuan Yang ₁ , Yuming Wei ₁ , Qing Guo ₁

Affiliation

This paper investigates the multicast transmission for multicast services in high‐throughput satellite (HTS) systems. Considering the multibeam multicast feature of HTSs, cooperative transmission among beams is involved in to improve the efficiency of the multicast transmission. Since the multicast transmission rate depends on the worst user channel state, all the users experience an unreasonably low rate. In this situation, subgrouping techniques are employed to increase transmission rates of users. A subgrouping‐based multicast transmission problem aiming at maximizing the lowest transmission rate of the users is studied to guarantee fairness among users. We formulate the problem as a max–min optimization problem and propose two low‐complex subgrouping algorithms for this problem. Additionally, we also consider multicasting in a single beam and devise a two‐layer transmission scheme for it. In the performance evaluation part, besides the impact of parameters on subgrouping performance, we analyze the performance and the computational complexity of the proposed algorithms. The results indicate that the two subgrouping algorithms can achieve favorable performance with low complexity.

中文翻译：

具有波束协作的高吞吐量卫星系统上基于分组的多播传输

本文研究了高吞吐量卫星（HTS）系统中用于多播服务的多播传输。考虑到HTS的多波束多播特性，涉及波束之间的协作传输以提高多播传输的效率。由于多播传输速率取决于最坏的用户通道状态，因此所有用户的速率均会过低。在这种情况下，采用分组技术来增加用户的传输速率。研究了基于分组的多播传输问题，旨在最大程度地降低用户的最低传输速率，以确保用户之间的公平性。我们将该问题表述为最大-最小优化问题，并针对该问题提出了两种低复杂度的分组算法。另外，我们还考虑在单波束中组播，并为此设计一种两层传输方案。在性能评估部分，除了参数对分组性能的影响外，我们还分析了所提算法的性能和计算复杂度。结果表明，两种分组算法都能以较低的复杂度实现良好的性能。

更新日期：2020-04-27

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