Transcoding: A new strategy for relay channels
Transcoding: A new strategy for relay channels
复制标题
转码：中继通道的新策略
DOI：
10.1109/allerton.2017.8262772
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Dennis Ogbe
中科院分区：
文献类型：
--
作者：
Chih;D. Love;Dennis Ogbe
中继信道是一个传统的信息论问题，在物联网等未来通信网络中有着重要的应用。在这项工作中，我们专注于最简单的中继模型：所谓的分离(或两跳)中继信道，其中源和目的地之间没有直接链路。前人的工作表明，对于该信道，译码转发(DF)中继策略是在块长度渐近的假设下实现容量的。然而，在本文中，我们感兴趣的是有限延迟机制，其中可以使用更简单的次优技术，如放大和转发(AF)，以避免在中继器处需要缓冲。我们提出了一种称为转码的新策略，它权衡了放大转发的低延迟优势和高速率、高延迟的解码转发方案。我们的结果表明，在有限延迟条件下，我们的简单、直观的转码方案优于传统的转码方案。
The relay channel is a traditional information-theoretic problem which has important applications in the Internet of Things (IoT) and other future communication networks. In this work, we focus on the simplest possible relaying model: the so-called separated (or two-hop) relay channel where there is no direct link between the source and the destination. Previous work has shown that for this channel, the decode-and-forward (DF) relaying strategy is capacity-achieving under the assumption of asymptotic block lengths. In this paper, however, we are interested in the finite-delay regime where simpler sub-optimal techniques like amplify-and-forward (AF) can be used to avoid the need for buffering at the relay. We present a new strategy called transcoding which presents a tradeoff between the low-latency advantages of amplify-and-forward and the high-rate, high-latency decode-and-forward scheme. Our results indicate that our simple, intuitive transcoding schemes outperform traditional relaying schemes in the finite-delay regime.
多跳中继：端到端延迟分析
影响因子：
10.4
作者：
A. Chaaban;A. Sezgin
通讯作者：
A. Sezgin