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.

随着通信向电池容量有限的移动设备的转变，能源消耗变得越来越重要。同时，由于需要支持视频等时间敏感服务的激增，因此需要仔细控制数据传输延迟。从用户的角度来看，影响移动体验的主要因素有：能耗（电池能持续多长时间）、延迟（等待内容多长时间）。从社会角度来看，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，与空中交通的排放量 (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，在拥塞系统中低延迟和低能耗的愿望是相互冲突的。因此，为了设计未来的通信系统，有必要了解拥塞系统中能量和延迟之间的基本权衡。这一基本分析的见解将用于联合设计新的通信软件和节能通信硬件，并在无线测试台上进行测试。该硬件可用作未来无线通信设备的基础。 该项目将让包括夏威夷原住民在内的少数族裔参与本科生研究经历，以鼓励这些少数族裔参与 STEM 领域。该项目旨在了解影响能量和延迟的因素，例如要传输的数据的时间特征和渠道的特点。为了对这些因素有一个基本的了解，有必要分析延迟和能量背后的信息论，同时考虑系统的实际特征，包括网络和硬件。该项目建立在最近关于有限块长度通信的信息论工作的基础上。基本上，如果块长度是无限的，如传统信息论中那样，则延迟也是无限的。因此，为了对延迟有更基本的理解，需要进行有限块长度分析。然而，块长度并不是延迟的直接指标。因此，必须专门开发有限块长度理论来研究延迟和能量。初步结果表明，延迟对能耗的影响比仅根据带宽限制所预期的要大得多。该项目分四个步骤研究延迟和能量之间的权衡。首先，它发展了有关延迟和能量的基本信息理论。然后将其应用于频谱效率至关重要的多用户系统。下一步，它将用实际的硬件约束来扩展模型。最后一步，该理论在具有最先进编码的硬件测试台上进行测试。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点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

关于流数据中的能量延迟权衡：有限块长度分析

• 发表时间: 2019-12
• 期刊: IEEE transactions on information theory
• 影响因子: 2.5
• 作者: Baig, Mirza;Yu, Lei;Xiong, Zixiang;Høst;Li, Houqiang;and Li, Weiping
• 通讯作者: and Li, Weiping

PIDNet: A Real-time Semantic Segmentation Network Inspired by PID Controllers

PIDNet：受 PID 控制器启发的实时语义分割网络

• DOI: 10.1109/cvpr52729.2023.01871
• 发表时间: 2022-06-04
• 期刊: 2023 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)
• 作者: Jiacong Xu;Zixiang Xiong;S. Bhattacharyya
• 通讯作者: S. Bhattacharyya

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: 2023-11
• 期刊: 2023 Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC
• 作者: Jiacong Xu; Riley Kilfoyle
• 通讯作者: Riley Kilfoyle

On energy-delay tradeoff in uncoordinated MAC

不协调MAC中的能量延迟权衡

• 发表时间: 2023-10
• 期刊: Proc. 2023 Allterton conference
• 作者: Yuming Han; Zixiang Xiong
• 通讯作者: Zixiang Xiong