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Computing over Space-Air-Ground Integrated Networks: Challenges and Opportunities
IEEE NETWORK ( IF 9.3 ) Pub Date : 2021-08-20 , DOI: 10.1109/mnet.011.2000567
Bodong Shang , Yang Yi , Lingjia Liu

Space-air-ground integrated networks (SAGINs) have gained significant attention and become a promising architecture for ubiquitous connectivity for SG-Advanced and 6G, enabling the integration of satellite networks, aerial networks, and terrestrial networks. This integration brings tremendous communication benefits, such as non-terrestrial networks, seamless global coverage, high flexibility, and augmented system capacity. Meanwhile, computing capability becomes an indispensable part of the SAGIN ecosystem. In SAGINs, limited and unbalanced computation and communication resources of different network segments make it challenging to provide strict quality-of-service (QoS) guarantees for specific traffic (e.g., delay-sensitive traffic and outage-sensitive traffic). To fully utilize available system resources in SAGINs, cooperative computing among different network segments is a promising technology. This article presents the fundamentals and applications of computing over SAGINs by introducing the system architecture and explaining the potential technical issues related to cooperative computing. Furthermore, the potential for cooperative computing over SAGINs is showcased with a preliminary performance evaluation. Finally, future research opportunities are discussed.

中文翻译:

天空地一体化网络计算:挑战与机遇

天地一体化网络(SAGINs)受到广泛关注,成为SG-Advanced和6G无处不在的连接架构,实现卫星网络、空中网络和地面网络的融合。这种集成带来了巨大的通信优势,例如非地面网络、无缝全球覆盖、高度灵活性和增强的系统容量。同时,计算能力成为 SAGIN 生态系统中不可或缺的一部分。在 SAGIN 中,不同网段的有限且不平衡的计算和通信资源使得为特定流量(例如,延迟敏感流量和中断敏感流量)提供严格的服务质量 (QoS) 保证具有挑战性。为了充分利用 SAGIN 中可用的系统资源,不同网段之间的协同计算是一种很有前途的技术。本文通过介绍系统架构并解释与协作计算相关的潜在技术问题,介绍了基于 SAGIN 的计算的基础知识和应用。此外,通过初步性能评估展示了在 SAGIN 上进行协作计算的潜力。最后,讨论了未来的研究机会。
更新日期:2021-08-24
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