On the Energy-Delay Tradeoff in Streaming Data: Finite Blocklength Analysis
On the Energy-Delay Tradeoff in Streaming Data: Finite Blocklength Analysis
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DOI：
10.1109/tit.2019.2954347
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发表时间：
2020-03
影响因子：
2.5
通讯作者：
Mirza Uzair Baig;Lei Yu;Zixiang Xiong;A. Høst-Madsen;Houqiang Li;Weiping Li
中科院分区：
文献类型：
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作者：
Mirza Uzair Baig;Lei Yu;Zixiang Xiong;A. Høst-Madsen;Houqiang Li;Weiping Li
本文研究了无线通信系统中使用有限块长理论的能量和延迟之间的基本权衡。我们首先假设数据以恒定的比特流到达，这些比特流被放入数据包并通过通信链路传输。我们的结果表明，根据能量的测量方式，一般能量取决于$\sqrt {d^{-1}}$或$\sqrt {d^{-1}\log {d}}$，其中$d$是延迟。这意味着能量随着延迟的增加而非常缓慢地减小。此外，为了接近能量的绝对最小值-1.59 dB，带宽必须非常迅速地增加，远远超过无限块长理论的预测。然后，我们考虑的情况下，数据到达随机分组，可以排队。我们设计了一个调度算法的基础上有限块长度理论和开发的能量延迟性能的界限。我们的结果再次表明，随着延迟的增加，能量下降得相当缓慢。
This paper investigates basic trade-offs between energy and delay in wireless communication systems using finite blocklength theory. We first assume that data arrive in constant stream of bits, which are put into packets and transmitted over a communications link. Our results show that depending on exactly how energy is measured, in general energy depends on $\sqrt {d^{-1}}$ or $\sqrt {d^{-1}\log {d}}$ , where $d$ is the delay. This means that the energy decreases quite slowly with increasing delay. Furthermore, to approach the absolute minimum of −1.59 dB on energy, bandwidth has to increase very rapidly, much more than what is predicted by infinite blocklength theory. We then consider the scenario when data arrive stochastically in packets and can be queued. We devise a scheduling algorithm based on finite blocklength theory and develop bounds for the energy-delay performance. Our results again show that the energy decreases quite slowly with increasing delay.