Low power consumption method of wireless sensor network and wireless sensor node

Abstract

The invention relates to a low power consumption method of a wireless sensor network and a wireless sensor node. In the method, the wireless sensor node comprises a processor, an FPGA (field programmable gate array) chip, a first radio-frequency circuit and a second radio-frequency circuit, wherein the processor is electrically connected with the FPGA chip; and the first radio-frequency circuit and the second radio-frequency circuit are electrically connected with the FPGA chip respectively. The frequency range of the first radio-frequency circuit is different from that of the second radio-frequency circuit, namely that the first radio-frequency circuit is specially used for transmitting data, and the second radio-frequency circuit is specially used for synchronizing the nodes of the wireless sensor network and transmitting an acknowledgement frame; and the information transmitted by the first radio-frequency circuit and the second radio-frequency circuit does not conflict with each other. In the invention, by working in double frequency ranges, the nodes of the wireless sensor network are synchronized, the data conflict is reduced, the data transmission is efficient, and the power consumption of the nodes is reduced.

Description

technical field [0001] The invention relates to wireless sensor network technology, in particular to a wireless sensor network low power consumption method and sensor nodes. Background technique [0002] With the vigorous development of the Internet of Things in the past two years, the wireless sensor network technology as the perception layer of the Internet of Things has also received great attention. Wireless Sensor Networks (WSN) is currently attracting international attention and involves multiple disciplines. A cutting-edge hot research field with a high degree of intersection and knowledge integration. Wireless sensor networks can obtain objective physical information and have very broad application prospects. They can be used in military defense, industrial and agricultural control, urban management, biomedicine, environmental detection, emergency rescue and disaster relief, remote control of dangerous areas and other fields. It has attracted great attention from ac...

AI Technical Summary

Problems solved by technology

[0003] The nodes of the wireless sensor network often need to be scattered in the wild, and form an ad-hoc network between the nodes. It is not realistic for the nodes to be continuously powered or to change the battery frequently. Generally, the battery is used for power supply, and the network life lasts for several years, which requires frequent nodes. Sleep, the traditional method generally uses software protocols to achieve synchronization between nodes, such as TDMA, TMAC and other protocols, which often require high clock accuracy. If there are multi-hop routes in the network, synchronization will be very complicated

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