為了提高無線傳感器的有效工作時間，在無線傳感器處于等待狀態時，令其休眠
是重要的一種降低功耗策略。分析已有的兩種無線傳感器分級休眠能耗模型的特點，指出這兩種模型是單部件無線傳感器分級休眠模型，它們不適用于多部件組成的無線傳感器。從而分析由雙部件組成的無線傳感器分級休眠能耗模型，推導了最小有效休眠時間公式，并指出了這個模型的改進之處。由已有的實驗數據計算可知，雙部件模型較單部件模型的最小有效休眠時間公式有較大的改進。
關鍵詞：無線傳感器網絡；節點；休眠；低功耗

Research on Sleep-state Transition Policy In Wireless Sensor Network Node
ZHENG Yuhuang, LI Di, YE Feng (School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou Guangdong, 510640)
[Abstract] In order to increase life time of wireless sensors, when wireless sensor is in waiting
mode, sleep mode is an important state for lower power consumption of wireless sensor. In this paper, two wireless sensor models of different sleep states and power consumption are analyzed. These models are classified in the single component wireless sensor model of different sleep states and these models are not suitable to the wireless sensor which is composed of more components. We consider double components wireless sensor model of different sleep states and power consumption model, deduce the minimum effective sleep time formula, and compare this model with the model above. From the experimental data, the minimum effective sleep time formula of double components wireless sensor is better than that of single components model of wireless sensor.
[Keywords] Wireless Sensor Network; Node; Sleep mode; Low-power