NeTS: Small: Towards Real-Time Video Streaming in the Internet of Underwater Things

NetS：小型：迈向水下物联网中的实时视频流

• 批准号: 1503609
• 负责人: Tommaso Melodia
• 金额: $ 30万
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-10-01 至 2018-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1503609&HistoricalAwards=false
• 关键词: NeTS; Small; Towards; Real; Time

The prospect of an 'Underwater Internet' has raised significant interest among the general public because of its potential in facilitating many commercial, scientific, and military activities at sea. Still, in spite of the increased attention by the research community in the last few years, underwater networks are still in their infancy. Current state-of-the-art underwater acoustic technology can support mostly point-to-point, low-data-rate, and delay-tolerant applications. This project is attempting to advance the state of the art in underwater networking by investigating two fundamental issues. First, it is developing technology to communicate over short-range links at higher transmission rates than available today. Second, it is developing technology to integrate the newly-designed acoustic communication technology with the Internet to guarantee interoperability with existing networks. The new capabilities will be demonstrated by focusing on video streaming application scenarios for underwater surveillance. The project will integrate research and education by establishing cross-listed graduate/undergraduate courses on acoustic networking and its applications, activities to reach out to underrepresented communities, and pursuit of technology transfer activities in this field.The project proposes a paradigm shift in how information is carried over short-range acoustic links, by developing novel carrierless transmission and multiple access techniques. Short, properly designed/shaped pulses are transmitted in the ultrasonic spectral regime following an adaptive time-hopping pattern with a superimposed spreading code of variable length. The effect is nearly seamless physical/MAC layer integration, and potential for highest data rate communication by properly optimized spreading sequences. Secondary -yet important- benefits of the proposed approach are low cost and weight oscillator-free transducers and excellent receiver interference suppressing capabilities. Integration with the Internet is being pursued by means of an adaptation layer that acts as an interface between higher-layer protocols and the underwater links by performing header compression, packet fragmentation, and creation of a virtual common broadcast space.

“水下互联网”的前景引起了公众的极大兴趣，因为它具有促进海上许多商业、科学和军事活动的潜力。尽管如此，尽管过去几年研究界越来越关注，但水下网络仍处于起步阶段。当前最先进的水声技术可以支持大多数点对点、低数据速率和延迟容忍的应用。该项目试图通过研究两个基本问题来推进水下网络的最新技术。首先，它正在开发以比目前更高的传输速率通过短距离链路进行通信的技术。其次，正在开发将新设计的声学通信技术与互联网集成的技术，以保证与现有网络的互操作性。新功能将通过重点关注水下监控的视频流应用场景来展示。该项目将通过建立关于声学网络及其应用的交叉列出的研究生/本科生课程、接触代表性不足的社区的活动以及追求该领域的技术转让活动来整合研究和教育。该项目提出了信息如何传递的范式转变。通过开发新颖的无载波传输和多址技术，在短距离声学链路上进行传输。短的、正确设计/整形的脉冲在超声频谱范围内按照自适应跳时模式和可变长度的叠加扩频码进行传输。其效果是几乎无缝的物理/MAC 层集成，并且通过适当优化的扩展序列实现最高数据速率通信的潜力。所提出的方法的次要但重要的好处是低成本和重量轻的无振荡器传感器以及出色的接收器干扰抑制能力。通过适配层来实现与互联网的集成，该适配层通过执行报头压缩、数据包分段和创建虚拟公共广播空间，充当高层协议和水下链路之间的接口。