A Mobile Data Collection Method for Wireless Sensor Networks Based on Tree Cluster Structure

Abstract

The invention relates to a wireless sensor network mobile data collecting method based on an arborescence cluster structure. The method comprises: based on the weighted spanning scheme, each node selects a maximum weighted node as a father node along the neighbor nodes in the jump range, after a tree is completed, a root node with the maximum weighted on each tree conducts Rendezvous Point (RP); based on a hop count and a flow current which are distanced from the root node, the segmentation is carried out on the tree, and the Sub-Rendezvous Point (SRP) in the tree is selected; the RP and the SRP are lingering collecting point of a mobile data collector (MDC), and the reselection, namely the tree recompleted, is conducted after a fixed period. Therefore, according to the wireless sensor network mobile data collecting method based on the arborescence cluster structure, equalizing network load is achieved, the node consumption is lowered, the hotspot problem is effectively alleviated, and the network life is prolonged.

Description

technical field [0001] The invention belongs to the field of wireless sensor networks. Specifically, the invention relates to a mobile data collection method based on a tree-like cluster structure in a wireless sensor network. Notify MDC for data collection. Background technique [0002] In recent years, more and more attention has been paid to data collection schemes using Mobile Elements (MEs), such as mobile sinks or mobile data collectors (MDCs), in wireless sensor networks (WSNs). In the process of WSN data collection using the mobile element ME, due to the frequent changes of the location of the ME, it can prevent the nodes around the ME from dying too quickly, and then achieve the purpose of balancing the load and alleviating the hotspot problem. However, the frequent change of the location of the ME will introduce the problem of increasing the overhead of the control packet for notifying each node of the latest location information of the ME. By clustering each nod...

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Problems solved by technology

[0016] The purpose of the present invention is to solve many problems and deficiencies existing in the existing mobile Sink data collection technology, and proposes a wireless sensor network mobile data collection method based on a tree-like cluster structure, wherein the parent node is mainly found locally through the node To form a tree, select a part of the data rendezvous point RP and sub-rendezvous point SRP in the tree, and associate other nodes with at least one rendezvous point, and the MDC will reach these rendezvous points to collect the data collected by each node, which can effectively balance the load. Reduce node energy consumption, alleviate hotspot problems, and increase network life

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