用于无线数据中心网络的基于增强动态波束宽度选择的太赫兹MAC协议
Enhanced Dynamic Beamwidth Selection-based THz MAC Protocol for Wireless Data Center Networks
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- Atlantic Technological University（大西洋理工大学）
- Munster Technological University（芒斯特理工大学）
机构由 AI 辅助整理，请以论文原文为准。
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中文总结 AI 辅助
研究针对太赫兹无线通信中MAC协议因波束宽度固定存在性能权衡的问题，提出基于动态波束宽度选择的MAC协议DBS - ADAPT及增强版EDBS - ADAPT，通过调整波束宽度提升吞吐量，经评估其相比基线协议性能显著提升，更适用于无线数据中心环境。
中文摘要 AI 辅助
太赫兹无线通信为数据中心的传统有线链路提供了有前景的替代方案，能实现超高数据速率、低延迟和更高的可扩展性。但太赫兹信号存在高路径损耗，需使用定向天线，这带来了诸如聋点和同步等挑战，通常通过接收方发起的MAC协议解决。大多数现有太赫兹MAC协议使用固定波束宽度，存在关键性能权衡。为此提出了基于动态波束宽度选择的MAC协议DBS - ADAPT，根据节点间距离调整天线波束宽度以最大化吞吐量且不影响链路范围。还引入了增强版本EDBS - ADAPT，进一步减少波束宽度切换和控制开销。通过NS - 3太赫兹模块评估，结果表明DBS - ADAPT相比基线ADAPT - 3协议平均吞吐量提高达22%，延迟降低达10%。EDBS - ADAPT将波束宽度切换开销进一步降低95%，对可扩展和高性能无线数据中心环境更高效。
英文摘要
Terahertz (THz) wireless communication offers a promising alternative to traditional wired links in data centers (DCs), enabling ultra high data rates, low latency, and greater scalability. However, THz signals suffer from high path loss, necessitating the use of directional antennas (DAs). While DAs enhance signal strength, they introduce challenges such as deafness and synchronisation, typically addressed through receiver initiated MAC protocols. Most existing THz MAC protocols use fixed beamwidths, which results in a key performance trade off: narrow beams improve gain for long range links but reduce throughput for short distances due to increased alignment overhead, while wide beams benefit short links but degrade performance over longer distances. To overcome this limitation, we propose DBS-ADAPT, a dynamic beamwidth selection based MAC protocol that adjusts the antenna beamwidth according to the distance between nodes, maximising throughput without compromising link range. We also introduce an enhanced version, EDBS-ADAPT, which further reduces beamwidth switching and control overhead while preserving throughput gains. Both protocols are evaluated using the NS-3 THz module. Simulation results show that DBS-ADAPT improves average throughput by up to 22% and reduces delay up to 10% compared to the baseline ADAPT-3 protocol. EDBS-ADAPT further cuts beamwidth switching overhead by 95%, making it more efficient for scalable and high performance wireless DC environments.
