基于网络分割的无线传感器网络多信道MAC协议

无线传感器网络中，可用正交信道数目较少和噪声干扰问题制约着多信道MAC协议性能的提升，结合数据采集应用的特点，提出一种基于网络分割的多信道MAC协议。在最小化网络总干扰值的基础上，网络分割引入碰撞因子进一步优化子树结构、降低树内干扰。并利用基于图着色理论的分配策略为每棵子树分配一条高质量信道。仿真实验结果表明，该协议显著提高了网络吞吐量，并且大幅降低了传输延迟和分组丢失率。

Multi-channel MAC protocol based on networkpartitioning for wireless sensor networks

The limited amount of available orthogonal channels and noise interference are two major issues to constrain performances of multi-channel MAC protocols in wireless sensor networks (WSN). In conjunction with features of data gathering networks, a partitioning-based multi-channel MAC protocol was designed. Initially it partitioned network into several sub-trees with lower collision factor, without increasing the total value of interference around the whole network. Furthermore, it adopted a coarse-grained channel assignment strategy on basis of graph coloring theory, in order to ensure each sub-tree work on a relative optimal channel. Simulation results show that the proposed MAC protocol can significantly improve throughput and reduce end-to-end latency and packet loss.