Cluster-chain hybrid data transmission method for wireless sensor network

Abstract

The invention discloses a cluster-chain hybrid data transmission method for a wireless sensor network. The method comprises the following steps: (1) dividing the whole network into a multi-layer square structure for a network terminal; (2) establishing a data transmission system in each inner layer area by using a cluster transmission method; (3) establishing a data transmission system in each outer layer area by using a chain transmission method; and (4) transmitting the data from a cluster head node and a chain head node to the network terminal by using a multi-hop technology. According to the method, wireless data transmission technologies such as multi-level network division, the cluster transmission method, the chain transmission method, and multi-hop transmission are integrated, andcompared with traditional wireless network data transmission methods (LBECP, LEACH, TCAC, DSBCA and the like), the method has the advantages of low energy consumption and long service life.

Description

technical field [0001] The invention relates to a data transmission method, in particular to a cluster-chain hybrid data transmission method oriented to a wireless sensor network. Background technique [0002] In order to ensure the safety and operability of civil engineering structures, structural health monitoring systems are installed on many civil engineering projects. Traditional structural health monitoring systems use wires to transmit data. These systems have the following disadvantages: (1) expensive; (2) low installation efficiency; (3) signal transmission is susceptible to environmental and artificial interference; (4) sensor layout is not flexible . First of all, in the structural health monitoring system of large civil engineering structures, the distance between the sensor and the network terminal is usually long, so the cables connecting the sensor and the network terminal are costly; It accounts for 75% of the total time to establish a structural health mon...

AI Technical Summary

Problems solved by technology

Traditional structural health monitoring systems use wires to transmit data. These systems have the following disadvantages: (1) expensive; (2) low installation efficiency; (3) signal transmission is susceptible to environmental and artificial interference; (4) sensor layout is not flexible

However, most wireless sensor networks installed in civil engineering use traditional data transmission methods (LBECP, LEACH, TCAC, DSBCA, etc.), which cannot meet the low energy consumption and long life requirements of wireless sensor networks for civil engineering structural health monitoring.

[0003] In addition, the traditional wireless network data transmission method has high energy consumption and short life. For example, the LEACH method cannot adjust the data transmission system based on the remaining energy of the nodes during data transmission, and cannot save energy by optimizing the number and distribution of cluster heads; For the HEED method, in the process of selecting the cluster head, each node needs to continuously transmit fixed-length data to the adjacent nodes, resulting in high communication energy consumption; the chain method has the problem that the chain head cannot be changed and the service life is short; if the When the URCA method is applied to a large-scale wireless sensor network, the outermost cluster has a large scale, long intra-group communication distance, and high energy consumption; the task-balanced low-energy cluster method also has the problems of large external area size, heavy cluster head communication burden, and short life. ; The disadvantage of the UCR method is also the high energy consumption of communication, which is because each common node has to transmit and receive a large amount of information in each round in order to select the cluster head node

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