Delay-Constrained Multihop Transmission in Wireless Networks: Interaction of Coding, Channel Access, and Routing

无线网络中的延迟约束多跳传输：编码、信道访问和路由的相互作用

• 批准号: 0515012
• 负责人: J Nicholas Laneman
• 金额: $ 48.47万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0515012&HistoricalAwards=false
• 关键词: Delay; Constrained; Multihop; Transmission; Wireless

Multihop transmission is increasingly being incorporated into modern wireless communication networks. These networks are central to our nation's future communications and monitoring infrastructures. Thebasic motivation for multihop is that transmissions occur over shorter distances -- and therefore with higher received signal strength -- via many intermediate nodes rather than over longer distances -- andtherefore with lower received signal strength -- between the source and destination of the information. However, multihop transmission involves complex interactions among channel coding at the physicallayer, distributed channel access at the link layer, and multihop routing at the network layer. These techniques have been studied largely in isolation by different communities, whereas this projectfocuses on their interaction, especially in delay-constrained scenarios.This research involves models for general wireless multihop networks, and develops tradeoffs for transmission along an individual routes of up to M + 1 nodes. Transmission between the end nodes can occur in a single hop, or up to M hops. Multihop transmission increases the received signal-to-noise ratio (SNR) at intermediate nodes; however, this observation does not take into account the important practical issues of power and bandwidth allocation, end-to-end delay, error propagation, or interference induced by other transmitters. Among other results, preliminary research indicates that the benefits of multihop are eroded by these issues, especially for high spectral efficiency, i.e., high data rates relative to the available bandwidth. The investigators take a comprehensive look at multihop transmission from the point of view of communication theory, mathematical networking, and networking practice, with the goal of offering solutions that will impact a major part of our society.

多跳传输越来越多地被并入现代无线通信网络中。 这些网络是我们国家未来通信和监控基础设施的核心。 多跳的基本动机是，传输发生在较短的距离上，因此具有较高的接收信号强度，通过许多中间节点，而不是在较长的距离上，因此具有较低的接收信号强度，在信息的源和目的地之间。 然而，多跳传输涉及复杂的相互作用之间的信道编码在物理层，分布式信道接入在链路层，和多跳路由在网络层。 这些技术已被研究主要是在隔离不同的社区，而本项目侧重于他们的互动，特别是在延迟约束scenaries.This研究涉及一般无线多跳网络的模型，并开发权衡传输沿着一个单独的路由多达M + 1个节点。端节点之间的传输可以发生在单跳或多达M跳中。多跳传输增加了接收到的信号噪声比（SNR）在中间节点，但是，这种观察没有考虑到重要的实际问题的功率和带宽分配，端到端的延迟，错误传播，或其他发射机引起的干扰。在其他结果中，初步研究表明，多跳的好处被这些问题侵蚀，特别是对于高频谱效率，即，相对于可用带宽的高数据速率。研究人员从通信理论、数学网络和网络实践的角度全面研究多跳传输，目标是提供将影响我们社会主要部分的解决方案。