NeTS-NBD: Cooperative Multi-Hop Wireless Communications and Networking: Joint Design of Error Control Coding, Medium Access, and Routing

协作多跳无线通信和网络：差错控制编码、介质接入和路由的联合设计蔡晓东多跳通信在许多新兴的无线网络中是有用的，例如ad hoc网络、传感器网络、mesh网络等。然而，当前的多跳通信方法在吞吐量、延迟、能量效率和鲁棒性方面不能提供令人满意的网络性能，当网络在具有复杂信道衰落和阴影的典型环境中操作时。这是由于几个主要问题：1）在网络层，当前的路由算法没有任何机制来科普无线信道中固有的衰落和阴影的有害影响，因为这些路由算法基于考虑路径损耗而不是衰落和阴影的无线信道的圆盘模型。2)在数据链路层和物理层，当前的传输方案没有适当地探索无线传输的广播性质以提高链路可靠性。3)由于缺乏跨网络、介质访问控制（MAC）和物理层的联合设计，因此难以优化网络性能。本计画旨在发展跨层合作通讯架构，以大幅提升多跳无线通讯的效能。具体而言，跨层设计框架提供了一个统一的方法，在网络，MAC和物理层，路由算法沿着与MAC方案确保节点的合作，而新的错误控制码（ECC）实现最大的编码和分集增益，使节点的合作。在这个项目中开发的通信和网络方法，预计将显着提高无线网络采用多跳通信的性能。

Cooperative Multi-Hop Wireless Communications and Networking: Joint Design of Error Control Coding, Medium Access, and RoutingAward 0626695Xiaodong CaiMulti-hop communication is instrumental in many emerging wireless networks such as ad hoc networks, sensor networks, mesh networks, etc. However, current multi-hop communication methods cannot provide satisfactory network performance in terms of throughput, latency, energy efficiency, and robustness, when the network operates in typical environments with complicated channel fading and shadowing. This is due to several major problems: 1) At the network layer, current routing algorithms do not have any mechanisms to cope with the detrimental effects of fading and shadowing inherent in wireless channels, since these routing algorithms are based upon a disk model for wireless channels that takes into account path loss, but not fading and shadowing. 2) At the data link and physical layers, current transmission schemes do not properly explore the broadcasting nature of wireless transmissions to improve link reliability. 3) The lack of a joint design across the network, medium access control (MAC), and physical layers renders it difficult to optimize network performance. This project aims to develop a framework of cross-layer cooperative communications to substantially improve the performance of multi-hop wireless communications. Specifically, the cross-layer design framework provides a unified approach across the network, MAC, and physical layers, where routing algorithms along with MAC schemes ensure node cooperation, while the novel error-control code (ECC) achieves maximum coding and diversity gain enabled by node cooperation. The communication and networking methods developed in this project are expected to significantly improve the performance of wireless networks employing multi-hop communication.