EARS: Achieving Spectrum Efficient Broadcast Under Cross-Technology Interference

EARS：在跨技术干扰下实现频谱高效广播

• 批准号: 1444021
• 负责人: Tian He
• 金额: $ 44.9万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1444021&HistoricalAwards=false
• 关键词: EARS; Achieving; Spectrum; Efficient; Broadcast

Wireless technologies have percolated into people's daily life for personal communication, mobile Internet surfing, global positioning, digital media broadcasting, and smart home automation. These technologies are deployed in environments ranging from well-controlled laboratories and residential houses to highly dynamic urban surroundings. This work aims at improving a range of wireless technologies so that information can be broadcast more reliably, quickly and cost-efficiently in highly crowded WiFi, Bluetooth and LTE environments. Research has shown that uncoordinated wireless coexistence in overlapping channels leads to severe inefficiency in spectrum utilization. Although a few coexistence designs have been done recently to deal with cross-technology interference (CTI), those studies focus primarily on improving spectrum utilization in unicast communication. Unlike in one-to-one unicast communication, network topological features in one-to-many broadcast communication significantly impact broadcast spectrum efficiency. With the increasing demand for broadcast support, the field is facing an urgent need to investigate broadcast spectrum efficiency in the context of wireless coexistence.This project conducts a systematic cross-layer study of broadcast under CTI, contributing novel designs across physical, data link, and network layers. The research topics include: 1) conducting extensive measurement studies to collect traces regarding cross-technology interference patterns in a wide range of environments; 2) building synthetic models to generalize instances of measure traces into a set of parameterized models that precisely characterize features of cross-technology interference; 3) empirically and theoretically modeling how uncontrolled CTI affects multiple wireless links simultaneously and proposing mitigation methods through network topology management; 4) delivering a spatial, temporal, and spectral CTI mapping device that exposures CTI information as a service to surrounding wireless ISM devices, so that these devices can seek white space opportunities in spatial, temporal and spectral domains for effective broadcast, and 5) supporting cross-technology broadcast by embedding side-channel information through cross-technology modulation. The broader impact of this work is amplified by (i) improving curriculum development with enhanced course projects; (ii) disseminating research results through high-profile tutorials and open-source sites; (iii) raising interest in technology among K-12 students and under-represented minority groups through open houses; and (iv) supporting talented female and minority PhD students to successfully accomplish their doctoral studies.

无线技术已经渗透到人们的日常生活中，包括个人通信、移动上网、全球定位、数字媒体广播、智能家居自动化等。这些技术部署在从控制良好的实验室和住宅到高度动态的城市环境等环境中。这项工作旨在改进一系列无线技术，以便在高度拥挤的 WiFi、蓝牙和 LTE 环境中更可靠、更快速、更经济高效地广播信息。研究表明，重叠信道中不协调的无线共存会导致频谱利用效率严重低下。尽管最近已经进行了一些共存设计来处理跨技术干扰（CTI），但这些研究主要集中在提高单播通信中的频谱利用率。与一对一单播通信不同，一对多广播通信中的网络拓扑特征显着影响广播频谱效率。随着对广播支持的需求不断增加，该领域迫切需要研究无线共存背景下的广播频谱效率。该项目对CTI下的广播进行了系统的跨层研究，在物理、数据链路、和网络层。研究主题包括：1）进行广泛的测量研究，收集各种环境中跨技术干扰模式的痕迹； 2) 构建综合模型，将测量轨迹实例概括为一组参数化模型，精确表征跨技术干扰的特征； 3）从经验和理论上对不受控的CTI如何同时影响多个无线链路进行建模，并通过网络拓扑管理提出缓解方法； 4) 提供空间、时间和频谱 CTI 映射设备，将 CTI 信息作为服务公开给周围的无线 ISM 设备，以便这些设备能够在空间、时间和频谱域中寻找空白机会以进行有效广播，以及 5) 支持通过跨技术调制嵌入边信道信息来进行跨技术广播。这项工作的更广泛影响通过以下方式得到放大：(i) 通过增强课程项目改进课程开发； (ii) 通过备受瞩目的教程和开源网站传播研究成果； (iii) 通过开放日提高 K-12 学生和代表性不足的少数群体对技术的兴趣； (iv) 支持有才华的女性和少数民族博士生成功完成博士学业。