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针对许多应用领域中被测对象变化缓慢,提出了广义时间同步的概念,详细分析了广义时间同步成立的条件以及数据重发次数对网络通信质量的影响,阐述了基于广义时间同步的无线传感器节点的休眠机制,并将该机制应用于温室无线监测网络.分析及实验结果表明:数据重发次数不小于4次时可以确保很好的通信质量,在相同时间内节点处于工作/休眠模式下的功耗约为发射/空闲模式下的1/10左右.
Aiming at the slow change of measured object in many fields of application, the concept of generalized time synchronization is proposed. The conditions of establishment of generalized time synchronization and the influence of data retransmission times on network communication quality are analyzed in detail. The wireless sensor nodes based on generalized time synchronization And the mechanism is applied to the greenhouse wireless monitoring network.The analysis and experimental results show that when the data retransmission times is not less than 4 times, good communication quality can be ensured, and when the node is in the working / dormancy mode at the same time The power consumption is about 1/10 in transmit / idle mode.