Network-Level and Content-Based Approaches to Diversity and Interference Management

本研究的总体科学目标是开发分布式物理层资源的最佳利用的理论和方法，以提供高吞吐量，混合流量，移动的，多媒体，无线通信网络的整体效率。这些资源包括功率、带宽、空间、服务质量（速率、保真度、延迟）和复杂性。用于设计和管理无线网络资源的现有方法对于处理对未来网络的预期需求是严重不足的，所述未来网络将需要向大量移动的订户递送高质量语音和多媒体服务。因此，在为网络吞吐量和灵活性的显著提高提供基础的同时，本研究开发的理论和方法为未来几代商业通信网络的发展提供了关键要素。分配、控制和减轻）的各种形式的干扰，这些干扰最终并严重地限制了无线网络性能。这些干扰包括时变多径、用户间干扰和网络外干扰。空间分集是无线网络中有效干扰管理的最重要机制之一，本研究强调以全球有效的方式使用这种形式的分集。目前正在研究若干具体和相互关联的研究主题。这些包括“虚拟阵列”的设计和开发，该虚拟阵列跨蜂窝边界组合联合收割机物理资源以增强整体网络性能，管理（即，干扰的控制和分配），以及在多媒体业务中创建和利用特定于内容的特性（主要通过空时编码），以增强整体网络吞吐量。总的来说，这些不同的问题提出了大量重要的研究挑战，并代表了非凡的机会，大大提高下一代无线网络的整体性能。这项研究所隐含的协议超越了传统OSI通信层次结构中的各个层，并涉及这些层之间的强交互。文森特·普尔，普林斯顿大学M。D. Trott，Arrayfield，Inc. G. W.沃内尔，马萨诸塞州理工学院A。Zakhor，加州大学伯克利分校

The overall scientific objective of this study is to develop theory and methodology for optimum utilization of distributed physical-layer resources to provide overall efficiency in high-throughput, mixed traffic, mobile, multimedia, wireless communication networks. These resources include power, bandwidth, space, quality of service (rate, fidelity, delay), and complexity. Existing methodologies for the design and management of wireless network resources are grossly inadequate for dealing with the demands projected for future networks that will need to deliver high-quality voice and multimedia services to large numbers of mobile subscribers. Thus, in providing a basis for significant improvement in network throughput and flexibility, the theory and methods developed under this study provide crucial elements for the development future generations of commercial communication networks.This research is focused on the development of algorithms for dynamic, network-level, and content-specific management (i.e., allocation, control and mitigation) of the various forms of interference that ultimately and severely limit wireless network performance. These include time-varying multipath, inter-user interference, and extra-network interference. Spatial diversity is among the most important mechanisms within wireless networks for effective interference management, and this investigation stresses use of this form of diversity in a globally efficient manner. Several specific and interrelated research themes are under study. These include the design and exploitation of "virtual arrays" that combine physical resources across cellular boundaries to enhance overall network performance, the management (i.e., the control and allocation) of interference, and the creation and exploitation of content-specific characteristics in multimedia traffic (primarily through space-time coding) for the enhancement of overall network throughput. Collectively, these diverse issues present a wealth of important research challenges and represent extraordinary opportunities to dramatically enhance the overall performance of next-generation wireless networks. The protocols implied by this research transcend individual layers in the traditional OSI communication hierarchy and involve strong interaction among these layers.Co-Principal Investigators:H. Vincent Poor, Princeton University M. D. Trott, Arraycomm, Inc. G. W. Wornell, Massachusetts Institute of Technology A. Zakhor, University of California, Berkeley