Multibeam high throughput satellite (MB-HTS) systems will play a key role in delivering broadband services to a large number of users with diverse Quality of Service (QoS) requirements. This paper focuses on MB-HTS where the same spectrum is re-used by all user links and, in particular, we propose a novel user scheduling design capable to provide guarantees in terms of individual QoS requirements while maximizing the system throughput. This is achieved by precoding to mitigate mutual interference. The combinatorial optimization structure requires an extremely high cost to obtain the global optimum even with a reduced number of users. We, therefore, propose a heuristic algorithm yielding a good local solution and tolerable computational complexity, applicable for large-scale networks. Numerical results demonstrate the effectiveness of our proposed algorithm on scheduling many users with better sum throughput than the other benchmarks. Besides, the QoS requirements for all scheduled users are guaranteed.
翻译:多波束高载量卫星(MB-HTS)系统将在向大量具有不同服务质量要求的用户提供宽带服务方面发挥关键作用,本文件侧重于相同频谱被所有用户链接重新使用的MB-HTS,特别是,我们建议采用新的用户排期设计,在最大程度实现系统吞吐量的同时,能够提供个人对QOS要求的保障。这是通过预先编码减少相互干扰实现的。组合优化结构需要极高的成本才能获得全球最佳服务,即使用户数量减少。因此,我们建议采用超常算法,产生良好的本地解决方案和可容忍的计算复杂性,适用于大型网络。数字结果表明,我们拟议的算法在将许多用户排入总量比其他基准要高的用户排入时具有效力。此外,还保证了所有预定用户对QS的要求。