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arXiv 2602.04825cs.NI
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在6G低轨星座中的双连接性

On Dual Connectivity in 6G Leo Constellations

Institute of Information Science and Technologies (ISTI), CNR, Pisa(意大利国家研究委员会信息与科学技术研究所)

Achilles Machumilane, Alberto Gotta

AI总结:

本文提出了一种数学框架,用于计算在6G低轨星座中双连接性下的平均端到端数据包丢失率,通过马尔可夫链建模无线信道丢失过程,并利用数据包复制、切换或网络编码技术优化资源分配。

摘要:

双连接(DC)在5G演进中引起了广泛关注,通过利用两条路径的信道条件来提高吞吐量和可靠性。然而,当路径表现出不同的延迟时,例如在陆地和非陆地集成网络中具有多轨道拓扑结构或在拓扑变化频繁的低地球轨道(LEO)卫星星座中,具有不同仰角的网络中,流量交付可能会经历数据包重排或触发拥塞控制机制。此外,实时流量如果其到达超过播放阈值可能会出现数据包丢失。已经提出了不同的技术来解决这些问题,例如数据包复制、数据包切换和网络编码用于DC中的流量调度。然而,如果不准确设计,这些技术可能导致资源浪费、编码/解码延迟和计算开销,从而削弱DC的预期效益。本文提供了一个数学框架,用于计算在无线信道中典型的马尔可夫链建模的丢失过程中,结合数据包复制和数据包切换或在网络编码中使用DC时的平均端到端数据包丢失率。这些指标有助于推导具有完整底层丢失过程知识的最佳策略,以与通过机器学习算法学习的实证模型进行比较。

英文摘要:

Dual connectivity (DC) has garnered significant attention in 5G evolution, allowing for enhancing throughput and reliability by leveraging the channel conditions of two paths. However, when the paths exhibit different delays, such as in terrestrial and non-terrestrial integrated networks with multi-orbit topologies or in networks characterized by frequent topology changes, like Low Earth Orbit (LEO) satellite constellations with different elevation angles, traffic delivery may experience packet reordering or triggering congestion control mechanisms. Additionally, real-time traffic may experience packet drops if their arrival exceeds a play-out threshold. Different techniques have been proposed to address these issues, such as packet duplication, packet switching, and network coding for traffic scheduling in DC. However, if not accurately designed, these techniques can lead to resource waste, encoding/decoding delays, and computational overhead, undermining DC's intended benefits. This paper provides a mathematical framework for calculating the average end-to-end packet loss in case of a loss process modeled with a Discrete Markov Chain - typical of a wireless channel - when combining packet duplication and packet switching or when network coding is employed in DC. Such metrics help derive optimal policies with full knowledge of the underlying loss process to be compared to empirical models learned through Machine Learning algorithms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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