An Integrated Exploration of Wireless Network Communication

研究了适应通信信道、信息源和网络拓扑结构时变的敏捷无线网络设计。该研究将带来设计原则，除了能够更有效地利用当前的蜂窝和PCS频段外，还将允许开发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。虽然高速通信和计算骨干的无线接入的基本蜂窝范式将被坚持，但几乎所有现有的第二代和预计的第三代蜂窝和PCS网络的其他假设都将被重新审视。与当前设计的一些显著差异如下。一个密集的基站网络将提供连接，尽管高路径损耗和高频段的尖锐阴影。边界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结构。各种流量类别，如语音、数据和视频，在延迟、丢失、再现质量和潜在接收方数量方面有不同的要求。整合的研究工作是由伊利诺伊大学教师调查人员及其学生组成的五个重叠的研究团队进行的，围绕以下跨学科项目组织：(1)概念系统，建模和性能限制，(2)无线分组网络设计原则，(3)时变信道设计，(4)联合优化源编码，信道编码和估计，以及(5)VLSI算法，架构和界限。调查人员正在运用他们在数字信号处理、通信系统、网络、电路设计和控制方面的专业知识。将应用多种方法，包括建模和仿真、自适应和通用算法方法的应用、利用天线阵列和极化进行分集和波束形成、代数编码技术、线性和非线性优化技术、信息论以及实验室实施和测量。

The research studies the design of agile wireless networks thataccommodate time variations in the communication channels, theinformation 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 andcomputing backbone will be adhered to, nearly every other assumptionin existing second-generation and projected third-generation cellularand PCS networks will be reexamined. Some of the significant differencesfrom current designs are as follows. A dense network of base stationswill provide connectivity despite the high path lossesand sharp shadowing at higher frequency bands. Cells withwell-defined boundaries may no longer exist, and mobile terminals willsee a rapidly varying network topology. A variety of traffic classes,such as voice, data, and video, with diverse requirements regardingdelay, loss, quality of reproduction, and number of potential receiverswill be considered.The integrated research effort is being conducted by five overlappingresearch teams of University of Illinois faculty investigators andtheir students, organized around the following interdisciplinary projects:(1) Concept Systems, Modeling, and Performance Limits,(2) Design Principles for Wireless Packet Networks,(3) Design for Time-Varying Channels,(4) Jointly Optimized Source Coding, Channel Coding, and Estimation, and(5) VLSI Algorithms, Architectures, and Bounds.The investigators are applying their expertise in digital signalprocessing, communication systems, networking, circuit design and control.A diverse array of methods will be applied, including modelingand simulation, application of adaptive and universal algorithmmethodologies, exploitation of antenna arrays and polarization fordiversity and beamforming, algebraic coding techniques, linear and nonlinearoptimization techniques, information theory, and laboratoryimplementation and measurement.