ITR: High-Speed Distributed Wireless Communication Networks

ITR：高速分布式无线通信网络

• 批准号: 0085929
• 负责人: Bruce Hajek
• 金额: $ 181.42万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-15 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0085929&HistoricalAwards=false
• 关键词: ITR; Speed; Distributed; Wireless; Communication

The proposed research studies the design of agile wireless networks that accommodate timevariations in the communication channels, the information sources, and the network topology. The research will lead to design principles that, in addition to enabling more efficient use of the current cellular and PCS bands, will allow exploitation of frequency bands in the 10-100 GHz range to provide high-speed multimedia services for both indoor and outdoor applications. While the basic cellular paradigm of wireless access to a high-speed communication and computing backbone will be adhered to, nearly every other assumption in existing second-generation and projected third-generation cellular and PCS networks will be reexamined. Some of the significant differences from current designs are as follows. A dense network of base stations will provide connectivity despite the high path losses and sharp shadowing at higher frequency bands. Cells with well-defined boundaries may no longer exist, and mobile terminals will see a rapidly varying network topology. A variety of traffic classes, such as voice, data, and video, with diverse requirements regarding delay, loss, quality of reproduction, and number of potential receivers will be considered. Packetized transmission will be considered as a flexible means of supporting such multimedia applications so that current circuit-based cellular trunking is not applicable.A key element of the approach is to envision new applications and new overall system architec-tures. Modeling based on propagation studies and analysis of requirements for carried datastreams will be used both to continually revise the concept systems and to provide models for the design of algorithms for such things as joint implementation of source coding, channel estimation, interference suppression, routing and congestion control. The performance of the algorithms will be evaluated broadly, including aspects of implementation in VLSI as appropriate, and the results will lead to further revision and refinement of the overall system architecture. Many tradeoffs will be explored, such as the tradeoff_ between the performance of distributed soft detection and the network capacity needed to assemble the required information. The integrated research effort will be conducted by five overlapping research teams of University of Illinois faculty investigators and their students, organized around the following interdisciplinaryprojects:Concept Systems, Modeling, and Performance LimitsDesign Principles for Wireless Packet NetworksDesign for Time-Varying ChannelsJointly Optimized Source Coding, Channel Coding, and EstimationVLSI Algorithms, Architectures, and BoundsThe bulk of the requested funding will be used to support the students. Most of the faculty andstudents have adjacent offices within the Coordinated Science Laboratory, an environment carefully cultivated to promote intense interaction and collaboration. Regularly scheduled weekly meetings of the investigators are used to coordinate the research and identify opportunities for better integration of the design approach. An External Advisory Committee of key technical people from industry will help ensure that the research is focused on problems and issues likely to be important in the future. This proposal is to supplement NSF grant NSF CCR 79381 \An Integrated Exploration of Wireless Network Communication." That grant is funded at a level of $700K for three years beginning October 1, 1999, whereas the original funding request was for $2.5M over five years. Although the proposal was rated as highly competitive, the funding received covers only six students and no faculty time. Additional funding will greatly enhance our ability to achieve our research and educational goals. Keywords: Wireless networks, fading channels, multimedia communications

该研究旨在研究如何设计灵活的无线网络，以适应通信通道、信息源和网络拓扑结构的时变。这项研究将导致设计原则，除了能够更有效地使用当前的蜂窝和PCS频段外，还将允许利用10-100 GHz范围的频段，为室内和室外应用提供高速多媒体服务。虽然无线接入高速通信和计算主干的基本蜂窝范例将得到遵守，但现有的第二代和预计的第三代蜂窝和PCS网络中的几乎所有其他假设都将得到重新审查。与当前设计的一些显著差异如下所示。密集的基站网络将提供连接，尽管在较高频段存在高路径损耗和尖锐阴影。边界定义明确的小区可能不再存在，移动终端将看到快速变化的网络拓扑。将考虑各种流量类别，例如语音、数据和视频，对延迟、丢失、再现质量和潜在接收器数量具有不同的要求。分组传输将被认为是支持这种多媒体应用的一种灵活手段，因此当前基于电路的蜂窝集群不再适用。该方法的一个关键要素是展望新的应用和新的整体系统架构。基于传播研究和对承载数据流的需求分析的建模将用于不断修订概念系统，并为联合实施信源编码、信道估计、干扰抑制、路由和拥塞控制等方面的算法设计提供模型。将对算法的性能进行广泛的评估，包括适当地在VLSI中实现的方面，结果将导致对整个系统架构的进一步修订和改进。我们将探索许多权衡，例如分布式软检测的性能与收集所需信息所需的网络容量之间的权衡。综合研究工作将由伊利诺伊大学教师研究人员及其学生组成的五个重叠的研究团队进行，围绕以下跨学科项目进行组织：概念系统、建模和性能限制无线分组网络设计原则时变信道设计联合优化信源编码、信道编码和估计VLSI算法、体系结构和边界申请的大部分资金将用于支持学生。大多数教师和学生在协调科学实验室内都有毗邻的办公室，这个环境是精心培育的，以促进密切的互动和合作。调查人员每周定期举行一次会议，以协调研究并确定更好地整合设计方法的机会。由工业界关键技术人员组成的外部咨询委员会将有助于确保研究重点放在未来可能重要的问题和问题上。这项建议是对美国国家科学基金会CCR 79381“无线网络通信综合探索”拨款的补充。这笔拨款的水平是70万美元，从1999年10月1日开始的三年内，而最初的拨款申请是在五年内拨款250万美元。虽然这项提案被评为非常有竞争力，但收到的资金只涉及六名学生，没有教职员工的时间。额外的资金将极大地增强我们实现研究和教育目标的能力。关键词：无线网络、衰落通道、多媒体通信