无线传感器网络链路统计特性研究与应用

无线传感器网络通信的动态、易损耗特性为可靠自组多跳的网络设计带来了很大的挑战。路由决策需要动态获取链路连通统计特性以获取传输可靠性。提出了一种无线传感器网络传输模型，以及—种实时链路质量预测机制；扩展NS2的功能，设计实现了一种无线传感器网络模拟平台；利用该软件提出了一种基于链路状态的定向扩散路由协议（LSBDD）；仿真实验运行结果评价了提出的链路质量预测机制的性能，证明了该网络模拟软件的有效可行性，并且验证了LSBDD的可靠性、能源有效性、以及可扩展性能。

Research and Application of Wireless Sensor Networks Link Statistical Characteristics

The dynamic and lossy nature of wireless sensor networks communication poses major challenges to reliable, self-organizing multi-hop networks designs. Link connectivity statistics should be captured dynamically, and be exploited by routing decisions to achieve reliability. A wireless sensor networks propagation model and a real-time link quality estimation scheme were proposed, and a practical wireless sensor networks simulation platform was designed. By using such platform, a reliable routing protocol called directed diffusion based on link state (LSBDD) was proposed. Simulation results evaluate the performance of the proposed estimation scheme, provide sound evidence for the proposed wireless sensor networks simulation platform, and demonstrate that LSBDD is energy-efficient, reliable and scalable.