Collaborate Research: Delay and Energy: Design Tradeoffs in Spectrally Efficient Systems

合作研究：延迟和能量：频谱效率系统的设计权衡

• 批准号: 1923751
• 负责人: Anders Host-Madsen
• 金额: $ 49.95万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1923751&HistoricalAwards=false
• 关键词: Collaborate; Research; Delay; Energy; Design

Energy consumption has become of increasing importance by the transition in communications to mobile devices with limited battery capacity. At the same time, data transmission delay needs to be carefully controlled due to the need to support the proliferation of time-sensitive services, such as video. Seen from a user perspective, these are the main things that affect the mobile experience: energy consumption (how long does the battery last), delay (how long to wait for content). From a societal perspective, wireless communications contribute significantly to global energy consumption and carbon dioxide emissions. An estimate is that currently 0.5-1% of global carbon dioxide emissions is due directly to wireless communications, comparable to that of air traffic (2%). At the same time, the number of devices that share the wireless medium is increasing dramatically. Yet, the desire for low delay and low energy consumption in congested systems conflict. In order to design future communication systems, it is therefore necessary to understand the fundamental tradeoff between energy and delay in congested systems. The insights from this fundamental analysis will be used to jointly design new communications software and energy efficient communication hardware, which will be tested in a wireless testbed. This hardware can be used as a basis for future wireless communication devices. The project will involve underrepresented minorities, including native Hawaiians, in undergraduate research experiences to encourage the participation of these minorities in the STEM field.The project aims to understand the factors that influence energy and delay such as the time characteristics of data to be transmitted and the characteristics of the channel. To obtain a fundamental understanding of these factors, it is necessary to analyze the information theory underlying delay and energy, taking into account realistic features of the systems, including networking and hardware. The project builds on the recent line of work in information theory on finite block length communications. Basically, if the block length is infinite, as in traditional information theory, the delay is also infinite. Therefore, in order to reach a more fundamental understanding of delay, finite block length analysis is needed. However, block length is not a direct indicator of delay. Therefore, finite block length theory has to be developed specifically for investigating delay and energy. Preliminary results show that delay affects energy consumption much more strongly than one would expect from bandwidth constraints alone. This project studies the tradeoff between delay and energy in four steps. First it develops the basic information theory relating delay and energy. It then applies this to multiuser systems, where spectral efficiency is essential. In the next step, it extends the models with realistic hardware constraints. In the final step, the theory is tested on a hardware testbed with state-of-the-art coding.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

通过通信到电池容量有限的移动设备的过渡，能源消耗变得越来越重要。同时，由于需要支持时间敏感服务（例如视频）的扩散，因此需要仔细控制数据传输延迟。从用户的角度看，这些是影响移动体验的主要因素：能源消耗（电池持续多长时间），延迟（等待内容多长时间）。从社会的角度来看，无线通信对全球能源消耗和二氧化碳排放产生了重大贡献。据估计，目前，全球二氧化碳排放量的0.5-1％直接归因于无线通信，与空中流量相当（2％）。同时，共享无线介质的设备数量正在急剧增加。然而，对拥挤系统冲突的低延迟和低能消耗的渴望。因此，为了设计未来的通信系统，有必要了解能量与拥挤系统延迟之间的基本权衡。此基本分析的见解将用于共同设计新的通信软件和能源有效的通信硬件，该软件将在无线测试台上进行测试。该硬件可以用作将来无线通信设备的基础。 该项目将涉及代表性不足的少数民族，包括夏威夷原住民的本科研究经验，以鼓励这些少数群体参与STEM领域。该项目旨在了解影响能量和延迟的因素，例如要传播数据的时间特征以及通道的特征。为了获得对这些因素的基本理解，有必要考虑到系统的现实特征，包括网络和硬件。该项目基于有关有限块长度通信的信息理论的最新工作。基本上，如果块长度是无限的，如传统信息理论中，延迟也是无限的。因此，为了对延迟有更基本的了解，需要有限的块长度分析。但是，块长度不是延迟的直接指标。因此，必须专门为研究延迟和能量而开发有限的块长度理论。初步结果表明，延迟对能源消耗的影响比仅带宽限制因素所期望的要严重得多。该项目研究了四个步骤延迟与能源之间的权衡。首先，它发展了基本信息理论，与延迟和能量有关。然后，它将其应用于多源系统，那里的光谱效率是必不可少的。在下一步中，它将使用逼真的硬件约束扩展模型。在最后一步中，该理论在具有最新编码的硬件测试中进行了测试。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响评估标准通过评估来支持的。

项目成果

Leveraging discrete modulation and liquid metal antennas for interference reduction

• DOI: 10.1186/s13638-021-02019-w
• 发表时间: 2021-07-15
• 期刊: EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
• 影响因子: 2.6
• 作者: Baig, Mirza Uzair;Elassy, Kareem S.;Nosratinia, Aria
• 通讯作者: Nosratinia, Aria

Latency-Energy Tradeoff with Realistic Hardware Models

与现实硬件模型的延迟-能量权衡

• 发表时间: 2020
• 期刊: International Symposium on Information Theory and its Applications
• 作者: Host-Madsen, A.;Whitcomb, N.;Weldon, J.;Xiong, Z.
• 通讯作者: Xiong, Z.

Compress-and-Forward Via Multilevel Coding and Trellis Coded Quantization

• DOI: 10.1109/lcomm.2020.3048620
• 发表时间: 2021-04
• 期刊: IEEE Communications Letters
• 作者: Heping Wan;A. Høst-Madsen;Aria Nosratinia

On the Energy-Delay Tradeoff in Streaming Data: Finite Blocklength Analysis

• DOI: 10.1109/tit.2019.2954347
• 发表时间: 2020-03
• 期刊: IEEE Transactions on Information Theory
• 影响因子: 2.5
• 作者: Mirza Uzair Baig;Lei Yu;Zixiang Xiong;A. Høst-Madsen;Houqiang Li;Weiping Li