低空异构网络中的网络可用性增强：跨层设计视角
Network Availability Enhancement in Low-Altitude HetNets: A Cross-Layer Design Perspective
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中文总结 AI 辅助
针对低空异构网络中异构性引发的NA问题，本文提出跨层计算-通信资源互换方法，仿真显示其较传统方法更优，可有效提升高异构性下的网络可用性。
中文摘要 AI 辅助
本文提出一种计算-通信资源互换方法，以提升低空异构网络（LA-HetNets）中的网络可用性（NA）。此类网络中，极端异构性（多样移动性、混合延迟与混合传输）及跨区域流量引发的通信资源冲突与失衡，会降低可靠性并导致网络不可用。恢复NA需要额外通信资源，但动态跨区域调度受限，因此本地冗余计算资源成为降低通信资源开销的替代方案。尽管计算资源可解决媒体接入控制（MAC）层的不可靠性，物理（PHY）层功能仍依赖通信资源。因此，仅增加计算资源能否达到目标NA仍不明确，尤其在异构性更高的场景下。本文详细阐述了异构性对NA的影响，表明在高异构性下仅扩展计算资源无法满足目标NA，因为通信能力需求增加会导致NA急剧下降。为解决该问题，本文提出一种跨层优化方法，通过计算-通信资源互换同时应对MAC和PHY层的不可靠性。该方法利用计算资源减少处理延迟，同时确保MAC层可靠性，从而延长PHY层传输延迟并扩展通信资源。仿真结果表明，所提方法在高异构性下实现目标NA方面具有优越性，揭示计算-通信资源互换比传统资源开销 reduction 更能有效满足通信能力扩展需求。
英文摘要
This paper proposes a computing-communication resource interchange method to enhance network availability (NA) in low-altitude heterogeneous networks (LA-HetNets). In these networks, communication resource conflicts and imbalances, caused by extreme heterogeneity (diverse mobility, mixed delays, and hybrid transmission), and cross-regional traffic, reduce reliability and lead to unavailability. Restoring NA requires additional communication resources, yet dynamic cross-regional scheduling is limited, making locally redundant computing resources an alternative to reduce communication resource overhead. While computing resources address medium access control (MAC)-layer unreliability, physical (PHY)-layer functionalities still rely on communication resources. Thus, it remains unclear whether increasing computing resources alone can achieve target NA, especially under greater heterogeneity. We elaborate on the impact of heterogeneity on NA and show that expanding computing resources alone cannot meet target NA under high heterogeneity, as NA degrades sharply due to increased communication capability demands. To overcome this, we propose a cross-layer optimization method enabling computing-communication resource interchange to address both MAC- and PHY-layer unreliability. By reducing processing delays with computing resources while ensuring MAC-layer reliability, our method extends PHY-layer transmission delay and expands communication resources. Simulations demonstrate our approach's superiority in achieving target NA under greater heterogeneity, revealing that computing-communication resource interchange fulfills expanding communication capability demands more effectively than conventional resource overhead reduction.
发表机构
- Xidian University（西安电子科技大学）
- Queen’s University Belfast（贝尔法斯特女王大学）
机构由 AI 辅助整理，请以论文原文为准。
