Method and device for repairing and enhancing cover performance of wireless sensor network

Abstract

The invention discloses a method and a device for repairing and enhancing the cover performance of a wireless sensor network, which relate to the field of wireless sensor networks. The method comprises steps: the optimal cover node set in the wireless sensor network is acquired based on an optimal node selection method for an irregular sensing region; according to attributes of each sensor node in the optimal cover node set and the sensing irregularity, the minimal connected cover set in the wireless sensor network is built; and based on the minimal connected cover set, a cover repairing and enhancing method based on connection is used for repairing a cover blind area and a redundant cover area in the wireless sensor network, and the cover performance of the wireless sensor network is improved. Energy is considered as a main factor, cover repairing is carried out based on signal transmission irregularity, sensing range irregularity of nodes in the network and cover connection in the network, and the purposes of saving the network energy, improving the network cover quality and prolong the effective service life of the network are achieved.

Description

technical field [0001] The present invention relates to the field of wireless sensor networks, in particular to a method and device for repairing and enhancing the coverage performance of wireless sensor networks. Background technique [0002] The wireless sensor network is composed of a large number of sensor nodes with perception, information processing and wireless communication capabilities. Its low cost, scalability, reliability, accuracy and ease of deployment make it widely used in different fields. Since sensor nodes are mainly powered by batteries, their energy has certain limitations. How to improve the coverage performance of wireless sensor networks in effective energy, in a more complex transmission environment, adapt to the diversity of application scenarios is a key issue for wireless sensor networks. Problems to be solved. The main task of wireless sensor network is to monitor the physical environment and forward the information sensed by nodes to other node...

AI Technical Summary

Problems solved by technology

Most of the research on sensor network coverage is based on the traditional omnidirectional sensing model, but in practice, the coverage performance of sensor networks will be affected by many factors. For example, due to the complexity of many application environments, the initial deployment of the network is mostly Using random deployment strategies such as throwing, throwing, spraying, etc., the distribution of nodes in the network is very random, which is easy to cause uneven distribution of nodes; coupled with the random distribution of sensing directions of directed sensor nodes, the sensing range is limited, so It is easier to form coverage holes and coverage overlaps in the perception area, which will affect the coverage performance of the network

In addition, in the case of a large number of network nodes, there are many factors affecting network coverage performance and the relationship is complex, making it difficult to optimize

In the above studies, only from the perspective of network coverage quality, the impact of wireless signal irregularities on network coverage and network connectivity is not considered.

For most sensing signals, if the wireless signal encounters obstacles during transmission, the power of the received signal will change, and there will be phenomena such as signal occlusion or loss, and it may also cause the reception of nodes in the network in different directions. There is a certain difference in the signal, and the wireless sensor network has irregularities in the propagation process

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