Grouped Packet Coding: A Method for Reliable Communication Over Fading Channels With Long Delays
Grouped Packet Coding: A Method for Reliable Communication Over Fading Channels With Long Delays
复制标题
DOI：
10.1109/joe.2018.2855498
复制
发表时间：
2019-10-01
影响因子：
4.1
通讯作者：
Stojanovic, Milica
中科院分区：
文献类型：
--
作者：
Ahmed, Rameez;Stojanovic, Milica
在本文中，我们研究了在半双工链路上可靠传输的自动重复请求（ARQ）。我们设计了一种基于分组分组编码（GPC）的方法，该方法将停止和等待（S&W） ARQ过程与随机线性分组编码和应用于编码分组的选择性确认相结合。我们这样做的目标是提高长延迟的低质量链路的吞吐量效率。这种链路在水声信道中尤其常见，其中误码率可能高达10(-3)，往返延迟可以以数千位为单位进行测量。为了量化所提出的S&W- gpc方法的优势，我们分析评估了其吞吐量效率，并将其与标准S&W方法的吞吐量效率以及全双工方法的基准效率进行了比较。我们的结果表明，S&W-GPC在长延迟的半双工链路上优于所有其他技术，在长延迟的全双工链路上优于无速率分组编码。我们给出了点对点链路和组播网络的结果。除了性能分析之外，我们还提供了优化系统设计的指导方针，其中包括对数据包大小、数据包编码和分组参数的明智选择。
In this paper, we investigate an automatic repeat request (ARQ) for reliable transmission over half-duplex links. We design a method based on grouped packet coding (GPC) that combines a stop-and-wait (S&W) ARQ procedure with random linear packet coding and selective acknowledgments applied to groups of coded packets. Our goal in doing so is to boost the throughput efficiency on poor-quality links with long delay. Such links are notably encountered in underwater acoustic channels, where the bit error rate may be as high as 10(-3) and round-trip delays can be measured in thousands of bits. To quantify the benefits of the proposed S&W-GPC method, we evaluate its throughput efficiency analytically and compare it with the throughput efficiency of standard S&W methods, as well as the benchmark efficiency of full-duplex methods. Our results show that S&W-GPC outperforms all other techniques on half-duplex links with long delay, as well as rateless packet coding on full-duplex links with long delay. We present results for a point-to-point link, as well as for a multicast network. In addition to the performance analysis, we offer guidelines for an optimal system design, which involves a judicious choice of the packet size, packet coding, and grouping parameters.