QoS保障的大规模超宽带多媒体传感网的生存期界限研究

Recently ultra wide band(UWB) multimedia sensor networks have drawn considerable attention. The key issue of wireless sensor networks is network lifetime, and multimedia sensor networks also need provide QoS guarantee. Furthermore, one of the characters of wireless sensor networks is very large number of sensor nodes, therefore it is necessary for us to study the QoS guarantee bound on lifetime of large-scale UWB multimedia sensor networks. This subject is focused on the QoS guarantee and the bound on lifetime of multimedia sensor network. It will study the bound of lifetime of UWB multimedia sensor network which has sigle QoS traffic class and multiple QoS traffic classes coexisted respectively. And the QoS guarantee bound of UWB multimedia sensor networks under limited memory capacity of nodes is also studied. Then, the QoS guarantee bound of heterogeneous UWB multimedia sensor network is studied. Furthermore, the lifetime bound of mobile UWB multimedia sensor network is studied. Finally, the network lifetime is simulated and validated using software. Lifetime results obtained from this subject will provide guidelines for deployment and protocol design of UWB multimedia sensor networks, and fasten the practical process of large-scale UWB multimedia sensor network.

超宽带多媒体传感网是当前的前沿研究热点，其研究才刚起步。无线传感网最关心的课题是生存期，多媒体传感网还需要提供QoS保障，而且无线传感网的特点之一是节点数量众多，因此需要研究QoS保障的大规模超宽带多媒体传感网的生存期界限。本项目根据多媒体传感网的QoS约束和生存期界限为主线，研究单一的QoS业务流以及多种不同QoS业务流共存的超宽带多媒体传感网的生存期界限；研究节点存储容量受限时的QoS保障的网络生存期界限；研究QoS保障的异质网络生存期界限；研究QoS保障的移动超宽带多媒体传感网的生存期界限；并使用仿真软件对网络生存期进行仿真和验证。本项目的研究，将为大规模超宽带多媒体传感网的部署和运行、以及协议设计等提供理论依据，从而加快大规模超宽带多媒体传感网的实用化进程。

本项目从超宽带通信网络的特性和QoS保障的大规模多媒体传感网的生存期模型出发，研究多种网络情形下的QoS保障的大规模多媒体传感网的生存期界。主要取得如下成果：.1） 分别推导得到AWGN信道下和频率选择性衰落信道下当多用户干扰相对于输出噪声能以高概率忽略不计时所需的IR-UWB信号渐近带宽以及IR-UWB通信网络误码率的闭式解。.2）分别得到了能刻画静态及移动多媒体传感网、超宽带多媒体传感网特性的生存期模型和通用的生存期定义。.3）提出了基于模糊控制的最优MAC接入方案、通过引入博弈论架构来实现QoS保障的MAC协议以及提出了高吞吐量低能耗的路由协议算法，并给出了QoS保障的静态超宽带无线传感器网络的生存期界限。.4）提出了基于认知-AODV 移动网络的低时延路由协议，并推导了生存期界限最大化的Sink节点移动优化模型以及给出了QoS保障的移动超宽带多媒体传感网的生存期界限。.5）分别得到了静态网络和移动网络在节点存储容量受限时的QoS保障的网络生存期下限。