纳米传感网通信建模及跨层协议优化设计

Nano Sensor Networks (NSNs), i.e., the interconnection of emerging nano-nodes are expected to expand the capabilities of traditional wireless sensor networks, promise new solutions for several applications in military, environmental and biomedical fields. However, traditional communication technologies are not suitable for NSNs mainly due to the physical constrains of nano-nodes and the peculiarities of communication channel in the terahertz band. In this project, the main features of NSNs, such as high node density, high path loss of terahertz channel, energy limitation and low capabilities of nano-nodes, are comprehensively taken into consideration to investigate the communication modeling and cross-layer protocol design for NSNs. The specific research problems to be studied include: 1) with high node density, present the 2D/3D interference models and the corresponding coverage probability models in the light of multi-ray propagation of terahertz signals; 2) design the error control mechanisms based on the information of channel states, coding mechanisms and energy states; 3) for ad hoc and centralized NSNs, propose contention-based and contention-free MAC protocols respectively; 4) design distance and energy-aware routing protocols. The outcomes of this project can not only complete the basic fundamentals of NSNs, also emphasize on the design of higher layer protocols. It has an important theoretical significance and will provide a guideline for the applications of NSNs.

由新兴的纳米节点组成的纳米传感网具有传统宏观无线传感网所不具备的潜能，在军事、环境、生物等领域具有非常重要的应用前景。然而，纳米节点的物理约束以及所采用太赫兹频段的通信特性导致现有的无线网络技术无法适用。本项目针对纳米网络中高节点密度的网络特性、高传输衰减的太赫兹信道特性、以及低能量供应和弱计算能力的节点硬件特性，拟进行纳米传感网的通信建模和跨层协议优化设计。具体研究内容包括：1）构建高节点密度下太赫兹信号多射线传播的二维和三维信号干扰模型和信号覆盖模型；2）设计基于信道状态、编码机制、能量状态等感知的差错预测、检测和重传技术；3）面向自组织和有中心的网络拓扑，分别设计太赫兹信道争用和无信道争用的MAC协议；4）设计基于距离和能量感知的路由协议。本项目的研究既可以完善纳米传感网的底层理论研究，又注重上层协议设计，将为纳米传感网的实际应用奠定基础，具有重要的理论意义和应用前景。

由新兴的纳米节点组成的纳米传感网具有传统宏观无线传感网所不具备的潜能，在军事、环境、生物等领域具有非常重要的应用前景。然而，纳米节点的物理约束和所使用太赫兹频段的信道特性导致现有的无线网络技术无法适用。本项目针对纳米网络中高节点密度的网络特性、高传输衰减的太赫兹信道特性、以及低能量供应和弱计算能力的节点硬件特性，进行了纳米传感网的信道建模和跨层协议优化设计。具体研究内容包括：1）构建高节点密度下太赫兹信号多射线传播的信号干扰模型和信号覆盖模型；2）设计基于信道状态、编码机制、能量状态等感知的差错预测、检测和重传技术；3）基于时隙分配的MAC协议和多波束按需功率分配的MAC协议；4）设计基于距离和能量感知的协作路由协议和多路反射增强路由协议。本项目的研究既可以完善纳米传感网的底层理论研究，又注重上层协议设计，将为纳米传感网的实际应用奠定基础，具有重要的理论意义和应用前景。