Multi-Satellite Cooperative Load-Balancing Scheme Based on Dynamic Beam Coverage for LEO Beam Hopping Systems

IF 4.6 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS IEEE Wireless Communications Letters Pub Date : 2024-08-30 DOI:10.1109/LWC.2024.3452115

Xiaoyan Zhao;Cheng Wang;Songsong Cai;Ruoqi Chen;Jiarui Wen;Lexi Xu;Weidong Wang

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Abstract

Due to the time-varying and non-uniform terrestrial traffic requirements, efficiently utilizing limited satellite resources to match non-uniform traffic demands brings challenges for Low Earth Orbit (LEO) beam-hopping (BH) technology. Existing LEO BH systems typically assume the fixed beam coverage sizes, potentially leading to resource congestion or wastage. In this letter, we present a novel multi-satellite collaborative two-dimensional load-balancing beam-hopping scheme based on dynamic beam coverage (MSDBC-BH), which encompasses both inter-beam load balancing and inter-satellite load balancing. This letter proposes the dynamic beam coverage design to achieve effective inter-beam load balancing. Additionally, a cell-satellite assignment scheme based on a game-matching algorithm is introduced to satisfy inter-satellite load balancing. Simulation results illustrate that the proposed MSDBC-BH effectively addresses the load imbalance among satellites and improves system throughput.

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基于低地轨道波束跳转系统动态波束覆盖的多卫星合作负载平衡方案

由于地面流量需求时变且不均匀，如何有效利用有限的卫星资源来满足不均匀的流量需求给低地轨道（LEO）波束跳频（BH）技术带来了挑战。现有的低地轨道跳束系统通常假定波束覆盖范围大小固定不变，这有可能导致资源拥塞或浪费。在这封信中，我们提出了一种基于动态波束覆盖的新型多卫星协作二维负载平衡跳束方案（MSDBC-BH），其中包括波束间负载平衡和卫星间负载平衡。本文提出了动态波束覆盖设计，以实现有效的波束间负载平衡。此外，还介绍了一种基于博弈匹配算法的小区-卫星分配方案，以满足卫星间负载平衡。仿真结果表明，所提出的 MSDBC-BH 能有效解决卫星间负载不平衡问题，提高系统吞吐量。

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来源期刊

IEEE Wireless Communications Letters Engineering-Electrical and Electronic Engineering

CiteScore

12.30

自引率

6.30%

发文量

481

期刊介绍： IEEE Wireless Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of wireless communications. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of wireless communication systems.