NR: Practical Strategies using Smart Antennas for Mobile Ad Hoc Networking

本计画将建立一个新颖的、跨学科的多层智慧型移动的自组织网路架构。一种智能天线系统使用具有数字信号处理能力的天线阵列，以自适应定向方式发射和接收，以减少干扰和提高吞吐量。 智能天线系统还具有响应于环境改变其方向性的能力。这个项目的主要贡献将是在实际的移动自组网系统的设计和仿真，利用智能天线。 特别是，这项研究工作将建立一个新的模型的MANET系统研究的基础上彻底的现实系统操作的多层建模。 虽然跨层优化已被考虑到跨更高级别的层（包括应用层），但很少有研究工作用于优化物理层以改进更高层的功能。 满足动态的服务质量（QoS）的要求，在移动自组网以及增加可扩展性，安全性和能源效率是公认的跨层MANET的设计问题，可以使拟议的研究。 在多输入多输出（MIMO）系统领域的许多理论发展提供了一个机会，以表征MANNETWORK，其中节点利用智能天线在两端的通信链路。 通过这个项目，将建立天线设计，天线放置，散射环境，和MIMO信道容量在实际系统中的MANET链路之间的关系。空时编码技术和波束形成策略将需要耦合，第一次，与动态邻居发现算法，以创建和维护ad-hoc链路在动态传播环境中。 在设计这些MANET链路时，将考虑到密集的城市环境和混合室内/室外环境所特有的用户密度、移动性和信道特性。最后，这个项目将开发新的路由算法，将考虑到独特的要求，并获得潜在的优势，通过使用智能天线。这一努力的目标将包括稳定的路由以及多个源之间的路由的最大共享，以提高计算效率和非对齐的定向路径，以减少干扰。

This project will establish a novel, interdisciplinary framework for multiple layers of smart antenna equipped mobile ad-hoc networks (MANETs). A smart antenna system uses an antenna array with a digital signal-processing capability to transmit and receive in an adaptive directional manner for reduced interference and higher throughput. A smart antenna system also has the ability to change its directionality in response to the environment. The main contribution of this project will be in the design and simulation of practical MANET systems making use of smart antennas. In particular, this research effort will build a new model for MANET system study based upon thorough multi-layer modeling of realistic system operation. While cross-layer optimizations have been considered across higher-level layers (including the application layer), little research effort has gone into optimizing the physical layer for improved higher layer functionality. Meeting dynamic Quality of Service (QoS) requirements in MANETs as well as increasing scalability, security, and energy efficiency are recognized cross-layer MANET design issues that can be enabled by the proposed research. Numerous theoretical developments in the area of Multiple-Input Multiple-Output (MIMO) systems provide an opportunity to characterize MANETs in which nodes make use of smart antennas at both ends of the communications link. Through this project, a relationship will be established between antenna designs, antenna placements, scattering environments, and MIMO channel capacities on MANET links in actual systems. Space-time coding techniques and beamforming strategies will need to be coupled, for the first time, with dynamic neighbor discovery algorithms to create and maintain ad-hoc links in a dynamic propagation environment. The user density, mobility, and channel characteristics unique to dense urban environments and hybrid indoor/outdoor environments will be taken into account when designing these MANET links. Finally, this project will develop novel routing algorithms that will consider the unique requirements imposed, and the potential advantages gained, by the use of smart antennas. The goals of this effort will include stable routes as well as maximal sharing of routes amongst multiple sources for increased computational efficiency and non-aligned directional paths for reduced interference.