用于传感器网络的高效分时洪泛时钟同步协议

High energy efficient clock synchronization protocol for sensor networks using time division flooding

针对在基于传统的洪泛机制的同步协议中,节点由于无法预测数据包的到达时间需要长时间处于监听状态而造成能源效率降低的问题,提出了一种可与大多数传感器网络MAC协议协同工作的全网同步协议,采用了全新的分时洪泛机制,动态给节点分配独一的发送和接收时隙,极大地降低了空闲监听时间。仿真结果表明其达到了很高的能源利用率,并能有效缩短收敛时间、减小频偏校正误差。

In most synchronization protocols that based on classic flooding scheme, the arrival time of packets couldn＇t be predicted, so nodes had to keep monitoring the channel. Therefore, idle listening was quite serious which leaded to low energy efficiency. A novel synchronization protocol focusing on reducing idle listening was proposed, where time division flooding scheme was adopted to spread messages. Unique transmitting and receiving slots would be assigned to each individual in localized and distributed way. Higher energy efficiency, lower clock compensation error and faster convergence speed could be achieved, as shown in the simulations. Furthermore, it could be easily modified to co-work with plenty of MAC protocols.