Collaborative 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: 1923803
• 负责人: Zixiang Xiong
• 金额: $ 25万
• 依托单位: Texas A&M Engineering Experiment Station
• 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=1923803&HistoricalAwards=false
• 关键词: Collaborative; 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.

随着通信向具有有限电池容量的移动的设备的转变，能量消耗变得越来越重要。与此同时，由于需要支持时间敏感服务（如视频）的激增，因此需要仔细控制数据传输延迟。从用户的角度来看，这些是影响移动的体验的主要因素：能耗（电池能用多久）、延迟（等待内容需要多长时间）。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做出了重大贡献。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，与空中交通（2%）相当。与此同时，共享无线介质的设备数量正在急剧增加。然而，在拥塞系统中对低延迟和低能耗的期望是冲突的。为了设计未来的通信系统，因此有必要了解拥塞系统中能量和延迟之间的基本权衡。从这一基本分析中获得的见解将用于联合设计新的通信软件和节能通信硬件，并将在无线测试平台上进行测试。该硬件可以用作未来无线通信设备的基础。 该项目将让包括夏威夷土著在内的代表性不足的少数民族参与本科生研究体验，以鼓励这些少数民族参与STEM领域。该项目旨在了解影响能量和延迟的因素，如要传输的数据的时间特性和信道的特性。为了从根本上理解这些因素，有必要分析延迟和能量的信息理论，同时考虑到系统的实际特征，包括网络和硬件。该项目建立在有限块长度通信信息理论的最新工作线上。基本上，如果块长度是无限的，如在传统的信息理论中，延迟也是无限的。因此，为了对延迟有更基本的理解，需要对有限块长度进行分析。然而，块长度不是延迟的直接指标。因此，有限块长度理论必须专门用于研究延迟和能量。初步结果表明，延迟影响能源消耗更强烈地比人们预期的带宽限制。该项目分四步研究延迟和能量之间的权衡。首先，它发展了与延迟和能量相关的基本信息理论。然后将其应用于多用户系统，其中频谱效率至关重要。在下一步中，它扩展模型与现实的硬件约束。在最后一步中，理论将在硬件测试平台上进行测试，并使用最先进的编码。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

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

On Energy-Delay Tradeoff in Uncoordinated MAC

• DOI: 10.1109/allerton58177.2023.10313356
• 发表时间: 2023-09
• 期刊: 2023 59th Annual Allerton Conference on Communication, Control, and Computing (Allerton)
• 作者: Yuming Han;Zixiang Xiong;Anders Høst-Madsen

Communication-efficient design of machine learning system for energy demand forecasting of electrical vehicles

电动汽车能源需求预测机器学习系统的通信高效设计

• 发表时间: 2023
• 期刊: 2023 Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC
• 作者: Jiacong Xu, Riley Kilfoyle