arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1703.08985cs.NIcs.ITmath.IT
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5G mmWave网络中的TCP:链路级重传和MP-TCP

TCP in 5G mmWave Networks: Link Level Retransmissions and MP-TCP

Michele Polese, Rittwik Jana, Michele Zorzi

摘要:

mmWave通信是未来5G移动网络的基石之一,其特征在于同时具有潜在的数千兆容量和非常动态的信道,对阻塞敏感,接收信号质量的大幅波动,以及可能的突然链路中断。虽然在文献中已经彻底研究了解决这些问题的物理和MAC层方案的性能,但毫米波链路和传输层协议(如TCP)之间的复杂交互仍然相对未被探索。本文使用ns-3 mmWave模块及其基于纽约市实际测量的信道模型,分析Linux TCP/IP堆栈的性能(i)有和没有链路层重传,表明它们是在mmWave链路上达到高TCP吞吐量的基础,(ii)在多个LTE和mmWave链路上使用多路径TCP(MP-TCP),示出了在不同条件下哪些是次级路径和拥塞控制算法的吞吐量最优组合。

英文摘要:

MmWave communications, one of the cornerstones of future 5G mobile networks, are characterized at the same time by a potential multi-gigabit capacity and by a very dynamic channel, sensitive to blockage, wide fluctuations in the received signal quality, and possibly also sudden link disruption. While the performance of physical and MAC layer schemes that address these issues has been thoroughly investigated in the literature, the complex interactions between mmWave links and transport layer protocols such as TCP are still relatively unexplored. This paper uses the ns-3 mmWave module, with its channel model based on real measurements in New York City, to analyze the performance of the Linux TCP/IP stack (i) with and without link-layer retransmissions, showing that they are fundamental to reach a high TCP throughput on mmWave links and (ii) with Multipath TCP (MP-TCP) over multiple LTE and mmWave links, illustrating which are the throughput-optimal combinations of secondary paths and congestion control algorithms in different conditions.

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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