Highly Efficient / High Quality Multimedia Delivery Techniques over Multi-Hop Wireless Networks

在第一年，我们首先对多跳无线网络的多路径路由协议进行了性能评估，并在笔记本Linux PC上进行了仿真和软件实现。然后，我们利用多台笔记本电脑搭建了实际的多跳无线网络试验台，并在校园进行了视频传输实验。具体有：(1)根据无线信道特性自适应切换传送路由的多径路由方法的仿真评估；(2)利用传送路由的接收功率来证明无线信道特性的多径路由方法的仿真评估；(3)KernelAODV的实现与修改，KernelAODV是一种运行在Linux上的开源多跳路由协议。(4)多台笔记本电脑构建的多跳无线网络视频内容分发实现实验。第二年，我们发表了一篇论文，在国内会议上做了一些报告，并继续对多跳无线网络的多径路由协议进行了评估。具体包括：(1)发表了多路径路由方法及其在多媒体内容分发中的应用；(2)用H.264/AVC代替H.263+进行多跳视频内容分发的实现评估；(3)模拟实际实现环境的多跳无线网络仿真评估；(4)视觉传感系统的原始原型实现。作为多路径路由协议和视频内容分发技术的应用。

In the first year, we firstly carried out performance evaluation by simulations and software implementations on notebook Linux PC about the multipath routing protocol for multi-hop wireless networks. Then, we built actual multi-hop wireless network testbed using multiple notebook PCs, and executed video delivery experiments in campus. Details are:(1)Simulation evaluations of the multipath routing method, that switches delivery routes adaptively according to wireless channel characteristics,(2)Simulation evaluations of the multipath routing method, that justifies wireless channel characteristics by using receiving powers of delivery routes,(3)Implementation and modification of KernelAODV, that is an open source multihop routing protocol operating on Linux, and(4)Implementation experiments of video content delivery over multi-hop wireless network built by multiple notebook PCs.In the second year, we published a paper, made some presentations at domestic conferences and continued evaluations about the multipath routing protocol for multi-hop wireless networks. Details are(1)Publication of a paper on the proposed multipath routing method and its application to multimedia content delivery,(2)Implementation evaluations of multi-hop video content delivery using H.264/AVC instead of H.263+,(3)Simulation evaluations of the multi-hop wireless network, that emulates actual implementation environment, and(4)Primitive prototype implementations of a visual sensing system, as an application of the proposed multipath routing protocol and video content delivery techniques.