Abstract: Wireless sensor nodes are often powered by batteries. Because batteries can only store li- mited energy, the network is destined to have a short lifespan. Therefore, maximizing the service life of sensor devices is an important research direction and topic. In this exploration and research on energy saving of wireless sensor network, energy collection and management strategies are analyzed. Energy collection mainly collects environmental energy, such as solar energy, and realizes energy storage through super capacitor. The energy management mainly makes the sensor nodes in the energy neutral region through the energy budget. In order to reduce the energy consumption of wireless sensor nodes, ultra-low power is adopted to wake up the receiver to continuously listen to the channel under the condition of low power consumption to reduce the power consumption related to communication. The star Asynchronous MAC protocol and ultra low power wake up receiver can be used in combination to improve the energy efficiency of sensor networks. The experimental results show that compared with the traditional scheme, this scheme has great improvement in energy efficiency, power consumption and throughput.

Key words: sensor, wireless sensor network, energy management, energy harvesting, low energy