Improved algorithm for reducing power consumption of wireless sensor network node of farmland soil moisture content monitoring system based on RPL

Abstract

The invention discloses an improved algorithm for reducing power consumption of a wireless sensor network node of a farmland soil moisture content monitoring system based on an RPL. The improved algorithm comprises the following steps: a, judging whether node transmission is normal or not, performing a step b if the node transmission is normal, and performing a step d if the node transmission is not normal; b, controlling adjacent two times of data string transmission of the node at a transmission interval I, if transmission is normal, setting that the transmission interval I in the next time is 2 times of the value of the current transmission interval I, and if the value of the I reaches the maximal interval I<max>, keeping the value of the I constant as I<max>; if an exception occurs in normal transmission, setting the transmission interval I to the minimal interval I<min> and performing a step c; c, sending C<value> pieces of data at the minimal interval I<min> by the node at first, performing the step b if the node transmission is normal, or else, performing the step d; d, carrying out subsequent transmission between mth data string transmission and m+1th data string transmission of the node at an interval I (m); and e, performing the step b if sending is in a normal mode in the step d, or else, performing the step d. The improved algorithm disclosed by the invention is capable of reducing the sending frequency of the node in the system, reducing the power consumption of the node and increasing the use efficiency.

Description

technical field [0001] The invention belongs to the technical field of agricultural monitoring, and in particular relates to an improved algorithm for controlling power consumption of wireless sensor network nodes in a farmland moisture monitoring system. Background technique [0002] The wireless sensor network of the farmland moisture monitoring system has the following characteristics: (1) Large scale, due to the vast area of ​​farmland, the required sensor nodes may reach hundreds or even thousands. (2) The spacing is large, the distance between adjacent nodes is usually more than 50-100m, and the node density is small. (3) In order to reduce costs, less redundant deployment is required. (4) The topological structure is stable, and most of them are deployed in a grid-like matrix structure, using a star or chain structure, and single-hop or multi-hop transmission. Nodes usually do not need to be moved or increased or decreased after deployment. (5) Periodic active data...

AI Technical Summary

Problems solved by technology

If the nodes are in the normal mode for a long time, the number of transmissions between nodes will be 2 x Exponentially decreasing, if there is a sudden abnormality, it cannot be found and taken measures immediately, which will lead to problems such as the loss of related nodes or the confusion of parent-child node relationships

On the other hand, if there is an abnormality between nodes (such as reconfiguring the network), the nodes will send information frequently for a long time, resulting in excessive energy consumption of the nodes, which is not conducive to the long-term use of the nodes

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