A method for maximizing the monitoring frequency of an energy-harvesting wireless sensor network
A wireless sensor network and energy acquisition technology, which is applied in the field of energy acquisition wireless sensor network to maximize the monitoring frequency, and can solve the problems of limited energy, unsuitable, and unsuitable for long-term continuous monitoring applications.
Active Publication Date: 2020-11-24
NANCHANG INST OF TECH
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Problems solved by technology
At the same time, new problems have also emerged in the current energy-harvesting sensor network. This problem is based on the current battery-powered sensor network, the monitoring utility, monitoring coverage, node positioning, data transmission technology and protocol, and data collection technology. are not suitable for this kind of energy harvesting sensor network
At present, the most basic problem facing ecological environment monitoring is how to improve the monitoring perception utility under the condition that the monitoring node is connected and covers the monitored point, that is, how to solve the monitoring utility problem of the energy dynamic acquisition wireless sensor network based on the connectivity and coverage constraints.
[0003] However, at present, for the problem of monitoring utility, the problem of energy limitation is first considered, that is, the research is carried out around prolonging the life of monitoring nodes; secondly, when considering the coverage of monitoring nodes, intelligent optimization algorithms (such as genetic algorithm, particle swarm algorithm and other evolutionary algorithms) are also used. Algorithm) to optimize the transmission power of each monitoring node, to minimize the energy consumption of the monitoring nodes and prolong the life of the monitoring nodes under the condition of satisfying the monitoring coverage, so these studies are not suitable for the application field of long-term continuous monitoring
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[0031] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:
[0032] Step 1: Build an energy-harvesting wireless sensor monitoring network model. Such as figure 1 , by adding a virtual node Sr, establish a virtual source node connected to all monitored target nodes z i ,i=1,2,3...,m, and monitoring nodes (s i , i=1,2,3...,m) to establish a network model G(V,E); the monitored target node z is described below i ,z j , the subscripts i and j of its identifier z are in the range of 1, 2, 3,..., m; the monitoring node s described below i ,s j , the value range of the subscript i and j of the identifier symbol s is 1, 2, 3,..., n; the subscript i and j of the same type of nodes represent different nodes, that is, i≠j;
[0033] Suppose SE(s i ) means monitoring node s i The acquired energy value, EZ j (s i ) means monitoring node s i Monitor the monitored target node z once j Required energy value, ER j (s ...
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The invention discloses a method for maximizing the monitoring frequency of an energy-obtaining wireless sensor network, which includes the following steps: setting up a virtual source node, establishing a connection relationship between the virtual source node and a monitored target node, and predicting the acquisition of the monitoring node according to an exponentially weighted moving average. energy, set the link weights between monitoring network nodes based on energy acquisition; monitoring network topology decomposition, use node splitting operation for topology decomposition, and establish the decomposed monitoring network; according to the decomposed monitoring network, calculate the virtual source node to Receive the maximum energy flow path of the node and perform reverse operation on each path, subtract the energy value required for monitoring the nodes on the path; update the monitoring network link weight; repeat the above calculation until there is no maximum energy flow; count the maximum energy The number of paths is the target monitoring frequency. The invention improves the performance of network monitoring frequency and energy utilization rate, not only realizes the maximization of monitoring frequency, but also effectively improves the throughput of the monitoring network.
Description
technical field [0001] The invention relates to a method for maximizing the monitoring frequency of an energy harvesting wireless sensor network. Background technique [0002] With the development of wireless sensor network technology, scholars at home and abroad have carried out research on the application of wireless sensor network in the fields of ecological environment monitoring, industry and agriculture, and natural disasters. In these application areas, wireless sensor networks need to coordinate the monitoring of sensor nodes, receive and process the monitoring information. However, sensing is based on battery-powered wireless sensor networks. Due to the low cost and energy constraints of wireless sensor networks, the current monitoring performance cannot be effectively improved. In recent years, scholars at home and abroad have successively developed various wireless sensor energy harvesting technologies. With the emergence of this external environment energy harve...
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IPC IPC(8): H04W40/08H04W40/24H04W84/18
CPCH04Q2209/886H04W40/08H04W40/248H04W84/18Y02D30/70
Inventor 包学才邓承志李院民刘有珠刘祖涵樊棠怀汪胜前
Owner NANCHANG INST OF TECH