Wireless sensor network data transmission method based on LEACH protocol

Abstract

The invention belongs to the technical field of a wireless sensor network system, and discloses a wireless sensor network data transmission method based on a LEACH protocol. By setting an energy threshold Va, a data transmission process is divided into whole-network cluster head election and in-cluster cluster head election; when energy is smaller than the energy threshold Va in all cluster heads, a whole-network election method is adopted, so that each node in a region has the chance to become a cluster head; and when energy is greater than the energy threshold Va in all the cluster heads, in-cluster election is carried out, new in-cluster cluster heads are selected according to constraint conditions of residual energy, a node density and a distance to an in-cluster mass center, a structure of a cluster is unchanged, and a non-cluster-head node is elected in the cluster to be used as a new cluster head. According to the invention, by an optimal cluster head rate of a wireless sensor network, all subsequent simulation experiments can be carried out, and various practice scenes can be more accurately and reliably simulated.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor network systems, and in particular relates to a data transmission method of a wireless sensor network based on the LEACH protocol. Background technique [0002] The wireless sensor network is an ad hoc network composed of a large number of sensor nodes through wireless transmission. The purpose is to sense, monitor, collect and process relevant environmental parameters in the area in real time, and finally send them to end users. The energy of nodes in wireless sensor networks is provided by batteries, and the survival time of nodes is limited by the capacity of batteries. Therefore, energy saving has always been a research hotspot in wireless sensor networks. Based on this, it is very important for wireless sensor networks to design high-efficiency and low-energy routing algorithms to prolong the lifetime of the network and improve the utilization of the network. The routing algorithm ba...

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Problems solved by technology

[0004] The algorithm of the LEACH routing protocol does not explain how the cluster head nodes are elected and allocated to ensure better transmission of network data information, which may cause the nodes selected as cluster heads to be concentrated in a local area, and the key path to the sink node The energy of the upper node is exhausted rapidly;

[0005] For each round of data transmission in the LEACH routing protocol algorithm, the entire network re-elects the cluster head. Some unnecessary cluster head elections in the entire network need to consume too much energy, and most of the battery energy may be wasted in the cluster. re-election of the head;

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